genshi/genshi-test: genshi/path.py annotate

annotate genshi/path.py @ 586:5413c9d95db1

Fixes for nonlocal variable access in code blocks, as well as nested function and class definitions.

author	cmlenz
date	Wed, 08 Aug 2007 22:21:21 +0000
parents	cccb6c748609
children	aa5762c7b7f1 f0bb2c5ea0ff

rev	line source
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	1 # -- coding: utf-8 --
821114ec4f69 Initial import. cmlenz parents: diff changeset	2 #
66 822089ae65ce Switch copyright to Edgewall and URLs to markup.edgewall.org. cmlenz parents: 61 diff changeset	3 # Copyright (C) 2006 Edgewall Software
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	4 # All rights reserved.
821114ec4f69 Initial import. cmlenz parents: diff changeset	5 #
821114ec4f69 Initial import. cmlenz parents: diff changeset	6 # This software is licensed as described in the file COPYING, which
821114ec4f69 Initial import. cmlenz parents: diff changeset	7 # you should have received as part of this distribution. The terms
230 24757b771651 Renamed Markup to Genshi in repository. cmlenz parents: 228 diff changeset	8 # are also available at http://genshi.edgewall.org/wiki/License.
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	9 #
821114ec4f69 Initial import. cmlenz parents: diff changeset	10 # This software consists of voluntary contributions made by many
821114ec4f69 Initial import. cmlenz parents: diff changeset	11 # individuals. For the exact contribution history, see the revision
230 24757b771651 Renamed Markup to Genshi in repository. cmlenz parents: 228 diff changeset	12 # history and logs, available at http://genshi.edgewall.org/log/.
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	13
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	14 """Basic support for evaluating XPath expressions against streams.
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	15
230 24757b771651 Renamed Markup to Genshi in repository. cmlenz parents: 228 diff changeset	16 >>> from genshi.input import XML
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	17 >>> doc = XML('''<doc>
516 0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	18 ... <items count="4">
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	19 ... <item status="new">
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	20 ... <summary>Foo</summary>
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	21 ... </item>
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	22 ... <item status="closed">
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	23 ... <summary>Bar</summary>
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	24 ... </item>
516 0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	25 ... <item status="closed" resolution="invalid">
0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	26 ... <summary>Baz</summary>
0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	27 ... </item>
0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	28 ... <item status="closed" resolution="fixed">
0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	29 ... <summary>Waz</summary>
0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	30 ... </item>
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	31 ... </items>
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	32 ... </doc>''')
516 0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	33 >>> print doc.select('items/item[@status="closed" and '
0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	34 ... '(@resolution="invalid" or not(@resolution))]/summary/text()')
0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	35 BarBaz
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	36
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	37 Because the XPath engine operates on markup streams (as opposed to tree
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	38 structures), it only implements a subset of the full XPath 1.0 language.
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	39 """
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	40
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	41 from math import ceil, floor
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	42 import re
821114ec4f69 Initial import. cmlenz parents: diff changeset	43
230 24757b771651 Renamed Markup to Genshi in repository. cmlenz parents: 228 diff changeset	44 from genshi.core import Stream, Attrs, Namespace, QName
24757b771651 Renamed Markup to Genshi in repository. cmlenz parents: 228 diff changeset	45 from genshi.core import START, END, TEXT, COMMENT, PI
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	46
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	47 __all__ = ['Path', 'PathSyntaxError']
425 5b248708bbed Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	48 __docformat__ = 'restructuredtext en'
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	49
821114ec4f69 Initial import. cmlenz parents: diff changeset	50
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	51 class Axis(object):
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	52 """Defines constants for the various supported XPath axes."""
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	53
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	54 ATTRIBUTE = 'attribute'
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	55 CHILD = 'child'
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	56 DESCENDANT = 'descendant'
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	57 DESCENDANT_OR_SELF = 'descendant-or-self'
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	58 SELF = 'self'
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	59
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	60 def forname(cls, name):
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	61 """Return the axis constant for the given name, or `None` if no such
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	62 axis was defined.
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	63 """
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	64 return getattr(cls, name.upper().replace('-', '_'), None)
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	65 forname = classmethod(forname)
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	66
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	67
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	68 ATTRIBUTE = Axis.ATTRIBUTE
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	69 CHILD = Axis.CHILD
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	70 DESCENDANT = Axis.DESCENDANT
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	71 DESCENDANT_OR_SELF = Axis.DESCENDANT_OR_SELF
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	72 SELF = Axis.SELF
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	73
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	74
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	75 class Path(object):
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	76 """Implements basic XPath support on streams.
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	77
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	78 Instances of this class represent a "compiled" XPath expression, and provide
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	79 methods for testing the path against a stream, as well as extracting a
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	80 substream matching that path.
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	81 """
821114ec4f69 Initial import. cmlenz parents: diff changeset	82
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	83 def __init__(self, text, filename=None, lineno=-1):
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	84 """Create the path object from a string.
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	85
425 5b248708bbed Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	86 :param text: the path expression
498 5b42b341185a A couple of minor doc refinements. cmlenz parents: 425 diff changeset	87 :param filename: the name of the file in which the path expression was
5b42b341185a A couple of minor doc refinements. cmlenz parents: 425 diff changeset	88 found (used in error messages)
5b42b341185a A couple of minor doc refinements. cmlenz parents: 425 diff changeset	89 :param lineno: the line on which the expression was found
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	90 """
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	91 self.source = text
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	92 self.paths = PathParser(text, filename, lineno).parse()
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	93
821114ec4f69 Initial import. cmlenz parents: diff changeset	94 def __repr__(self):
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	95 paths = []
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	96 for path in self.paths:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	97 steps = []
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	98 for axis, nodetest, predicates in path:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	99 steps.append('%s::%s' % (axis, nodetest))
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	100 for predicate in predicates:
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	101 steps[-1] += '[%s]' % predicate
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	102 paths.append('/'.join(steps))
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	103 return '<%s "%s">' % (self.__class__.__name__, '\|'.join(paths))
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	104
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	105 def select(self, stream, namespaces=None, variables=None):
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	106 """Returns a substream of the given stream that matches the path.
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	107
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	108 If there are no matches, this method returns an empty stream.
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	109
230 24757b771651 Renamed Markup to Genshi in repository. cmlenz parents: 228 diff changeset	110 >>> from genshi.input import XML
33 0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	111 >>> xml = XML('<root><elem><child>Text</child></elem></root>')
61 33c2702cf6da Use a different namespace than Kid uses. cmlenz parents: 38 diff changeset	112
216 0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	113 >>> print Path('.//child').select(xml)
33 0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	114 <child>Text</child>
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	115
216 0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	116 >>> print Path('.//child/text()').select(xml)
33 0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	117 Text
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	118
425 5b248708bbed Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	119 :param stream: the stream to select from
5b248708bbed Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	120 :param namespaces: (optional) a mapping of namespace prefixes to URIs
5b248708bbed Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	121 :param variables: (optional) a mapping of variable names to values
5b248708bbed Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	122 :return: the substream matching the path, or an empty stream
498 5b42b341185a A couple of minor doc refinements. cmlenz parents: 425 diff changeset	123 :rtype: `Stream`
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	124 """
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	125 if namespaces is None:
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	126 namespaces = {}
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	127 if variables is None:
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	128 variables = {}
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	129 stream = iter(stream)
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	130 def _generate():
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	131 test = self.test()
305 6e6950ac0e56 Various performance-oriented tweaks. cmlenz parents: 282 diff changeset	132 for event in stream:
6e6950ac0e56 Various performance-oriented tweaks. cmlenz parents: 282 diff changeset	133 result = test(event, namespaces, variables)
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	134 if result is True:
305 6e6950ac0e56 Various performance-oriented tweaks. cmlenz parents: 282 diff changeset	135 yield event
330 1dbeaef463e7 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	136 if event[0] is START:
1dbeaef463e7 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	137 depth = 1
1dbeaef463e7 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	138 while depth > 0:
1dbeaef463e7 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	139 subevent = stream.next()
1dbeaef463e7 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	140 if subevent[0] is START:
1dbeaef463e7 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	141 depth += 1
1dbeaef463e7 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	142 elif subevent[0] is END:
1dbeaef463e7 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	143 depth -= 1
1dbeaef463e7 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	144 yield subevent
1dbeaef463e7 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	145 test(subevent, namespaces, variables,
1dbeaef463e7 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	146 updateonly=True)
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	147 elif result:
821114ec4f69 Initial import. cmlenz parents: diff changeset	148 yield result
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	149 return Stream(_generate())
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	150
38 fec9f4897415 Fix for #2 (incorrect context node in path expressions). Still some paths that produce incorrect results, but the common case seems to work now. cmlenz parents: 37 diff changeset	151 def test(self, ignore_context=False):
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	152 """Returns a function that can be used to track whether the path matches
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	153 a specific stream event.
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	154
425 5b248708bbed Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	155 The function returned expects the positional arguments ``event``,
5b248708bbed Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	156 ``namespaces`` and ``variables``. The first is a stream event, while the
305 6e6950ac0e56 Various performance-oriented tweaks. cmlenz parents: 282 diff changeset	157 latter two are a mapping of namespace prefixes to URIs, and a mapping
306 3425c26d2c09 Minor optimization for XPath evaluation. cmlenz parents: 305 diff changeset	158 of variable names to values, respectively. In addition, the function
425 5b248708bbed Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	159 accepts an ``updateonly`` keyword argument that default to ``False``. If
5b248708bbed Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	160 it is set to ``True``, the function only updates its internal state,
306 3425c26d2c09 Minor optimization for XPath evaluation. cmlenz parents: 305 diff changeset	161 but does not perform any tests or return a result.
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	162
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	163 If the path matches the event, the function returns the match (for
425 5b248708bbed Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	164 example, a `START` or `TEXT` event.) Otherwise, it returns ``None``.
33 0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	165
230 24757b771651 Renamed Markup to Genshi in repository. cmlenz parents: 228 diff changeset	166 >>> from genshi.input import XML
33 0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	167 >>> xml = XML('<root><elem><child id="1"/></elem><child id="2"/></root>')
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	168 >>> test = Path('child').test()
305 6e6950ac0e56 Various performance-oriented tweaks. cmlenz parents: 282 diff changeset	169 >>> for event in xml:
6e6950ac0e56 Various performance-oriented tweaks. cmlenz parents: 282 diff changeset	170 ... if test(event, {}, {}):
386 921c873c2f0e Unit test fixes for Python 2.3. cmlenz parents: 384 diff changeset	171 ... print event[0], repr(event[1])
921c873c2f0e Unit test fixes for Python 2.3. cmlenz parents: 384 diff changeset	172 START (QName(u'child'), Attrs([(QName(u'id'), u'2')]))
498 5b42b341185a A couple of minor doc refinements. cmlenz parents: 425 diff changeset	173
5b42b341185a A couple of minor doc refinements. cmlenz parents: 425 diff changeset	174 :param ignore_context: if `True`, the path is interpreted like a pattern
5b42b341185a A couple of minor doc refinements. cmlenz parents: 425 diff changeset	175 in XSLT, meaning for example that it will match
5b42b341185a A couple of minor doc refinements. cmlenz parents: 425 diff changeset	176 at any depth
5b42b341185a A couple of minor doc refinements. cmlenz parents: 425 diff changeset	177 :return: a function that can be used to test individual events in a
5b42b341185a A couple of minor doc refinements. cmlenz parents: 425 diff changeset	178 stream against the path
5b42b341185a A couple of minor doc refinements. cmlenz parents: 425 diff changeset	179 :rtype: ``function``
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	180 """
333 b70563ade748 Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	181 paths = [(p, len(p), [0], [], [0] * len(p)) for p in [
b70563ade748 Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	182 (ignore_context and [_DOTSLASHSLASH] or []) + p for p in self.paths
b70563ade748 Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	183 ]]
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	184
306 3425c26d2c09 Minor optimization for XPath evaluation. cmlenz parents: 305 diff changeset	185 def _test(event, namespaces, variables, updateonly=False):
330 1dbeaef463e7 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	186 kind, data, pos = event[:3]
259 6f11ad260890 Fix bug in evaluating XPath expressions using the union operator `\|`, which caused any path but the first to get out of sync with the event stream, and the whole thing returning too few results. cmlenz parents: 250 diff changeset	187 retval = None
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	188 for steps, size, cursors, cutoff, counter in paths:
216 0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	189 # Manage the stack that tells us "where we are" in the stream
211 0a14c2a06be3 Fix another regression introduced in [258]: some kinds of cascaded match templates were broken, for example in the TurboGears example app. cmlenz parents: 179 diff changeset	190 if kind is END:
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	191 if cursors:
f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	192 cursors.pop()
211 0a14c2a06be3 Fix another regression introduced in [258]: some kinds of cascaded match templates were broken, for example in the TurboGears example app. cmlenz parents: 179 diff changeset	193 continue
223 861105f3afe3 Fix typo introduced in [272]. cmlenz parents: 217 diff changeset	194 elif kind is START:
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	195 cursors.append(cursors and cursors[-1] or 0)
259 6f11ad260890 Fix bug in evaluating XPath expressions using the union operator `\|`, which caused any path but the first to get out of sync with the event stream, and the whole thing returning too few results. cmlenz parents: 250 diff changeset	196
306 3425c26d2c09 Minor optimization for XPath evaluation. cmlenz parents: 305 diff changeset	197 if updateonly or retval or not cursors:
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	198 continue
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	199 cursor = cursors[-1]
f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	200 depth = len(cursors)
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	201
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	202 if cutoff and depth + int(kind is not START) > cutoff[0]:
216 0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	203 continue
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	204
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	205 ctxtnode = not ignore_context and kind is START \
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	206 and depth == 2
259 6f11ad260890 Fix bug in evaluating XPath expressions using the union operator `\|`, which caused any path but the first to get out of sync with the event stream, and the whole thing returning too few results. cmlenz parents: 250 diff changeset	207 matched = None
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	208 while 1:
216 0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	209 # Fetch the next location step
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	210 axis, nodetest, predicates = steps[cursor]
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	211
216 0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	212 # If this is the start event for the context node, and the
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	213 # axis of the location step doesn't include the current
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	214 # element, skip the test
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	215 if ctxtnode and (axis is CHILD or axis is DESCENDANT):
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	216 break
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	217
216 0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	218 # Is this the last step of the location path?
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	219 last_step = cursor + 1 == size
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	220
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	221 # Perform the actual node test
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	222 matched = nodetest(kind, data, pos, namespaces, variables)
216 0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	223
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	224 # The node test matched
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	225 if matched:
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	226
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	227 # Check all the predicates for this step
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	228 if predicates:
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	229 for predicate in predicates:
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	230 pretval = predicate(kind, data, pos, namespaces,
f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	231 variables)
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	232 if type(pretval) is float: # FIXME <- need to
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	233 # check this for
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	234 # other types that
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	235 # can be coerced to
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	236 # float
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	237 counter[cursor] += 1
f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	238 if counter[cursor] != int(pretval):
f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	239 pretval = False
f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	240 if not pretval:
216 0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	241 matched = None
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	242 break
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	243
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	244 # Both the node test and the predicates matched
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	245 if matched:
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	246 if last_step:
217 d8b195b22a44 Fix `py:match` directive which would screw up in some scenarios due to incorrect handling of the substream. Closes #49. cmlenz parents: 216 diff changeset	247 if not ctxtnode or kind is not START \
d8b195b22a44 Fix `py:match` directive which would screw up in some scenarios due to incorrect handling of the substream. Closes #49. cmlenz parents: 216 diff changeset	248 or axis is ATTRIBUTE or axis is SELF:
216 0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	249 retval = matched
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	250 elif not ctxtnode or axis is SELF \
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	251 or axis is DESCENDANT_OR_SELF:
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	252 cursor += 1
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	253 cursors[-1] = cursor
216 0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	254 cutoff[:] = []
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	255
333 b70563ade748 Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	256 if kind is START:
b70563ade748 Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	257 if last_step and not (axis is DESCENDANT or
b70563ade748 Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	258 axis is DESCENDANT_OR_SELF):
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	259 cutoff[:] = [depth]
216 0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	260
333 b70563ade748 Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	261 elif steps[cursor][0] is ATTRIBUTE:
216 0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	262 # If the axis of the next location step is the
363 caf7b68ab5dc Parse template includes at parse time to avoid some runtime overhead. cmlenz parents: 333 diff changeset	263 # attribute axis, we need to move on to processing
caf7b68ab5dc Parse template includes at parse time to avoid some runtime overhead. cmlenz parents: 333 diff changeset	264 # that step without waiting for the next markup
caf7b68ab5dc Parse template includes at parse time to avoid some runtime overhead. cmlenz parents: 333 diff changeset	265 # event
216 0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	266 continue
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	267
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	268 # We're done with this step if it's the last step or the
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	269 # axis isn't "self"
384 1596045ff0f3 Fix for infinite loop in XPath test. Closes #82. cmlenz parents: 364 diff changeset	270 if not matched or last_step or not (
1596045ff0f3 Fix for infinite loop in XPath test. Closes #82. cmlenz parents: 364 diff changeset	271 axis is SELF or axis is DESCENDANT_OR_SELF):
216 0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	272 break
0a01371cecbc Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	273
333 b70563ade748 Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	274 if (retval or not matched) and kind is START and \
b70563ade748 Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	275 not (axis is DESCENDANT or axis is DESCENDANT_OR_SELF):
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	276 # If this step is not a closure, it cannot be matched until
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	277 # the current element is closed... so we need to move the
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	278 # cursor back to the previous closure and retest that
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	279 # against the current element
333 b70563ade748 Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	280 backsteps = [(i, k, d, p) for i, (k, d, p)
b70563ade748 Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	281 in enumerate(steps[:cursor])
215 e92135672812 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	282 if k is DESCENDANT or k is DESCENDANT_OR_SELF]
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	283 backsteps.reverse()
333 b70563ade748 Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	284 for cursor, axis, nodetest, predicates in backsteps:
b70563ade748 Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	285 if nodetest(kind, data, pos, namespaces, variables):
b70563ade748 Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	286 cutoff[:] = []
b70563ade748 Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	287 break
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	288 cursors[-1] = cursor
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	289
259 6f11ad260890 Fix bug in evaluating XPath expressions using the union operator `\|`, which caused any path but the first to get out of sync with the event stream, and the whole thing returning too few results. cmlenz parents: 250 diff changeset	290 return retval
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	291
821114ec4f69 Initial import. cmlenz parents: diff changeset	292 return _test
821114ec4f69 Initial import. cmlenz parents: diff changeset	293
821114ec4f69 Initial import. cmlenz parents: diff changeset	294
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	295 class PathSyntaxError(Exception):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	296 """Exception raised when an XPath expression is syntactically incorrect."""
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	297
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	298 def __init__(self, message, filename=None, lineno=-1, offset=-1):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	299 if filename:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	300 message = '%s (%s, line %d)' % (message, filename, lineno)
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	301 Exception.__init__(self, message)
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	302 self.filename = filename
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	303 self.lineno = lineno
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	304 self.offset = offset
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	305
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	306
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	307 class PathParser(object):
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	308 """Tokenizes and parses an XPath expression."""
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	309
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	310 _QUOTES = (("'", "'"), ('"', '"'))
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	311 _TOKENS = ('::', ':', '..', '.', '//', '/', '[', ']', '()', '(', ')', '@',
179 a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	312 '=', '!=', '!', '\|', ',', '>=', '>', '<=', '<', '$')
163 9df6f057efd3 Support for XPath number literals including decimal places. cmlenz parents: 162 diff changeset	313 _tokenize = re.compile('("[^"]")\|(\'[^\']\')\|((?:\d+)?\.\d+)\|(%s)\|([^%s\s]+)\|\s+' % (
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	314 '\|'.join([re.escape(t) for t in _TOKENS]),
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	315 ''.join([re.escape(t[0]) for t in _TOKENS]))).findall
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	316
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	317 def __init__(self, text, filename=None, lineno=-1):
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	318 self.filename = filename
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	319 self.lineno = lineno
163 9df6f057efd3 Support for XPath number literals including decimal places. cmlenz parents: 162 diff changeset	320 self.tokens = filter(None, [dqstr or sqstr or number or token or name
9df6f057efd3 Support for XPath number literals including decimal places. cmlenz parents: 162 diff changeset	321 for dqstr, sqstr, number, token, name in
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	322 self._tokenize(text)])
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	323 self.pos = 0
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	324
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	325 # Tokenizer
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	326
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	327 at_end = property(lambda self: self.pos == len(self.tokens) - 1)
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	328 cur_token = property(lambda self: self.tokens[self.pos])
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	329
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	330 def next_token(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	331 self.pos += 1
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	332 return self.tokens[self.pos]
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	333
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	334 def peek_token(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	335 if not self.at_end:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	336 return self.tokens[self.pos + 1]
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	337 return None
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	338
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	339 # Recursive descent parser
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	340
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	341 def parse(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	342 """Parses the XPath expression and returns a list of location path
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	343 tests.
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	344
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	345 For union expressions (such as `*\|text()`), this function returns one
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	346 test for each operand in the union. For patch expressions that don't
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	347 use the union operator, the function always returns a list of size 1.
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	348
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	349 Each path test in turn is a sequence of tests that correspond to the
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	350 location steps, each tuples of the form `(axis, testfunc, predicates)`
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	351 """
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	352 paths = [self._location_path()]
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	353 while self.cur_token == '\|':
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	354 self.next_token()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	355 paths.append(self._location_path())
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	356 if not self.at_end:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	357 raise PathSyntaxError('Unexpected token %r after end of expression'
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	358 % self.cur_token, self.filename, self.lineno)
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	359 return paths
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	360
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	361 def _location_path(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	362 steps = []
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	363 while True:
215 e92135672812 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	364 if self.cur_token.startswith('/'):
e92135672812 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	365 if self.cur_token == '//':
e92135672812 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	366 steps.append((DESCENDANT_OR_SELF, NodeTest(), []))
e92135672812 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	367 elif not steps:
e92135672812 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	368 raise PathSyntaxError('Absolute location paths not '
e92135672812 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	369 'supported', self.filename,
e92135672812 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	370 self.lineno)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	371 self.next_token()
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	372
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	373 axis, nodetest, predicates = self._location_step()
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	374 if not axis:
145 56d534eb53f9 * Fix error in expression evaluation when the expression evaluates to an iterable that does not produce event tuples. cmlenz parents: 139 diff changeset	375 axis = CHILD
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	376 steps.append((axis, nodetest, predicates))
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	377
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	378 if self.at_end or not self.cur_token.startswith('/'):
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	379 break
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	380
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	381 return steps
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	382
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	383 def _location_step(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	384 if self.cur_token == '@':
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	385 axis = ATTRIBUTE
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	386 self.next_token()
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	387 elif self.cur_token == '.':
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	388 axis = SELF
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	389 elif self.cur_token == '..':
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	390 raise PathSyntaxError('Unsupported axis "parent"', self.filename,
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	391 self.lineno)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	392 elif self.peek_token() == '::':
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	393 axis = Axis.forname(self.cur_token)
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	394 if axis is None:
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	395 raise PathSyntaxError('Unsupport axis "%s"' % axis,
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	396 self.filename, self.lineno)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	397 self.next_token()
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	398 self.next_token()
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	399 else:
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	400 axis = None
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	401 nodetest = self._node_test(axis or CHILD)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	402 predicates = []
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	403 while self.cur_token == '[':
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	404 predicates.append(self._predicate())
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	405 return axis, nodetest, predicates
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	406
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	407 def _node_test(self, axis=None):
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	408 test = prefix = None
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	409 next_token = self.peek_token()
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	410 if next_token in ('(', '()'): # Node type test
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	411 test = self._node_type()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	412
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	413 elif next_token == ':': # Namespace prefix
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	414 prefix = self.cur_token
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	415 self.next_token()
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	416 localname = self.next_token()
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	417 if localname == '*':
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	418 test = QualifiedPrincipalTypeTest(axis, prefix)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	419 else:
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	420 test = QualifiedNameTest(axis, prefix, localname)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	421
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	422 else: # Name test
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	423 if self.cur_token == '*':
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	424 test = PrincipalTypeTest(axis)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	425 elif self.cur_token == '.':
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	426 test = NodeTest()
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	427 else:
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	428 test = LocalNameTest(axis, self.cur_token)
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	429
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	430 if not self.at_end:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	431 self.next_token()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	432 return test
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	433
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	434 def _node_type(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	435 name = self.cur_token
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	436 self.next_token()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	437
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	438 args = []
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	439 if self.cur_token != '()':
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	440 # The processing-instruction() function optionally accepts the
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	441 # name of the PI as argument, which must be a literal string
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	442 self.next_token() # (
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	443 if self.cur_token != ')':
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	444 string = self.cur_token
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	445 if (string[0], string[-1]) in self._QUOTES:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	446 string = string[1:-1]
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	447 args.append(string)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	448
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	449 cls = _nodetest_map.get(name)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	450 if not cls:
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	451 raise PathSyntaxError('%s() not allowed here' % name, self.filename,
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	452 self.lineno)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	453 return cls(*args)
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	454
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	455 def _predicate(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	456 assert self.cur_token == '['
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	457 self.next_token()
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	458 expr = self._or_expr()
121 22a7080ed242 Added support for the XPath functions `name()`, `namespace-uri()`, `local-name()`, and `not()`. cmlenz parents: 114 diff changeset	459 if self.cur_token != ']':
22a7080ed242 Added support for the XPath functions `name()`, `namespace-uri()`, `local-name()`, and `not()`. cmlenz parents: 114 diff changeset	460 raise PathSyntaxError('Expected "]" to close predicate, '
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	461 'but found "%s"' % self.cur_token,
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	462 self.filename, self.lineno)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	463 if not self.at_end:
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	464 self.next_token()
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	465 return expr
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	466
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	467 def _or_expr(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	468 expr = self._and_expr()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	469 while self.cur_token == 'or':
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	470 self.next_token()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	471 expr = OrOperator(expr, self._and_expr())
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	472 return expr
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	473
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	474 def _and_expr(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	475 expr = self._equality_expr()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	476 while self.cur_token == 'and':
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	477 self.next_token()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	478 expr = AndOperator(expr, self._equality_expr())
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	479 return expr
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	480
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	481 def _equality_expr(self):
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	482 expr = self._relational_expr()
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	483 while self.cur_token in ('=', '!='):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	484 op = _operator_map[self.cur_token]
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	485 self.next_token()
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	486 expr = op(expr, self._relational_expr())
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	487 return expr
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	488
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	489 def _relational_expr(self):
516 0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	490 expr = self._sub_expr()
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	491 while self.cur_token in ('>', '>=', '<', '>='):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	492 op = _operator_map[self.cur_token]
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	493 self.next_token()
516 0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	494 expr = op(expr, self._sub_expr())
0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	495 return expr
0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	496
0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	497 def _sub_expr(self):
0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	498 token = self.cur_token
0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	499 if token != '(':
0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	500 return self._primary_expr()
0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	501 self.next_token()
0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	502 expr = self._or_expr()
0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	503 if self.cur_token != ')':
0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	504 raise PathSyntaxError('Expected ")" to close sub-expression, '
0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	505 'but found "%s"' % self.cur_token,
0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	506 self.filename, self.lineno)
0e5a25f1b83d Implemented XPath sub-expressions. athomas parents: 498 diff changeset	507 self.next_token()
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	508 return expr
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	509
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	510 def _primary_expr(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	511 token = self.cur_token
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	512 if len(token) > 1 and (token[0], token[-1]) in self._QUOTES:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	513 self.next_token()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	514 return StringLiteral(token[1:-1])
163 9df6f057efd3 Support for XPath number literals including decimal places. cmlenz parents: 162 diff changeset	515 elif token[0].isdigit() or token[0] == '.':
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	516 self.next_token()
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	517 return NumberLiteral(as_float(token))
179 a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	518 elif token == '$':
a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	519 token = self.next_token()
a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	520 self.next_token()
a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	521 return VariableReference(token)
121 22a7080ed242 Added support for the XPath functions `name()`, `namespace-uri()`, `local-name()`, and `not()`. cmlenz parents: 114 diff changeset	522 elif not self.at_end and self.peek_token().startswith('('):
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	523 return self._function_call()
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	524 else:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	525 axis = None
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	526 if token == '@':
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	527 axis = ATTRIBUTE
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	528 self.next_token()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	529 return self._node_test(axis)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	530
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	531 def _function_call(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	532 name = self.cur_token
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	533 if self.next_token() == '()':
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	534 args = []
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	535 else:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	536 assert self.cur_token == '('
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	537 self.next_token()
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	538 args = [self._or_expr()]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	539 while self.cur_token == ',':
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	540 self.next_token()
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	541 args.append(self._or_expr())
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	542 if not self.cur_token == ')':
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	543 raise PathSyntaxError('Expected ")" to close function argument '
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	544 'list, but found "%s"' % self.cur_token,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	545 self.filename, self.lineno)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	546 self.next_token()
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	547 cls = _function_map.get(name)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	548 if not cls:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	549 raise PathSyntaxError('Unsupported function "%s"' % name,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	550 self.filename, self.lineno)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	551 return cls(*args)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	552
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	553
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	554 # Type coercion
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	555
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	556 def as_scalar(value):
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	557 """Convert value to a scalar. If a single element Attrs() object is passed
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	558 the value of the single attribute will be returned."""
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	559 if isinstance(value, Attrs):
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	560 assert len(value) == 1
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	561 return value[0][1]
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	562 else:
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	563 return value
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	564
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	565 def as_float(value):
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	566 # FIXME - if value is a bool it will be coerced to 0.0 and consequently
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	567 # compared as a float. This is probably not ideal.
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	568 return float(as_scalar(value))
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	569
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	570 def as_long(value):
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	571 return long(as_scalar(value))
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	572
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	573 def as_string(value):
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	574 value = as_scalar(value)
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	575 if value is False:
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	576 return u''
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	577 return unicode(value)
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	578
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	579 def as_bool(value):
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	580 return bool(as_scalar(value))
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	581
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	582
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	583 # Node tests
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	584
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	585 class PrincipalTypeTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	586 """Node test that matches any event with the given principal type."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	587 __slots__ = ['principal_type']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	588 def __init__(self, principal_type):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	589 self.principal_type = principal_type
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	590 def __call__(self, kind, data, pos, namespaces, variables):
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	591 if kind is START:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	592 if self.principal_type is ATTRIBUTE:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	593 return data[1] or None
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	594 else:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	595 return True
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	596 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	597 return '*'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	598
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	599 class QualifiedPrincipalTypeTest(object):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	600 """Node test that matches any event with the given principal type in a
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	601 specific namespace."""
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	602 __slots__ = ['principal_type', 'prefix']
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	603 def __init__(self, principal_type, prefix):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	604 self.principal_type = principal_type
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	605 self.prefix = prefix
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	606 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	607 namespace = Namespace(namespaces.get(self.prefix))
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	608 if kind is START:
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	609 if self.principal_type is ATTRIBUTE and data[1]:
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	610 return Attrs([(name, value) for name, value in data[1]
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	611 if name in namespace]) or None
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	612 else:
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	613 return data[0] in namespace
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	614 def __repr__(self):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	615 return '%s:*' % self.prefix
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	616
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	617 class LocalNameTest(object):
364 41d6eb7885ec Fix for #77: match templates were matching their own output. cmlenz parents: 363 diff changeset	618 """Node test that matches any event with the given principal type and
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	619 local name.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	620 """
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	621 __slots__ = ['principal_type', 'name']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	622 def __init__(self, principal_type, name):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	623 self.principal_type = principal_type
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	624 self.name = name
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	625 def __call__(self, kind, data, pos, namespaces, variables):
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	626 if kind is START:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	627 if self.principal_type is ATTRIBUTE and self.name in data[1]:
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	628 return Attrs([(self.name, data[1].get(self.name))])
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	629 else:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	630 return data[0].localname == self.name
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	631 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	632 return self.name
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	633
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	634 class QualifiedNameTest(object):
364 41d6eb7885ec Fix for #77: match templates were matching their own output. cmlenz parents: 363 diff changeset	635 """Node test that matches any event with the given principal type and
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	636 qualified name.
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	637 """
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	638 __slots__ = ['principal_type', 'prefix', 'name']
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	639 def __init__(self, principal_type, prefix, name):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	640 self.principal_type = principal_type
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	641 self.prefix = prefix
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	642 self.name = name
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	643 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	644 qname = QName('%s}%s' % (namespaces.get(self.prefix), self.name))
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	645 if kind is START:
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	646 if self.principal_type is ATTRIBUTE and qname in data[1]:
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	647 return Attrs([(self.name, data[1].get(self.name))])
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	648 else:
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	649 return data[0] == qname
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	650 def __repr__(self):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	651 return '%s:%s' % (self.prefix, self.name)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	652
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	653 class CommentNodeTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	654 """Node test that matches any comment events."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	655 __slots__ = []
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	656 def __call__(self, kind, data, pos, namespaces, variables):
330 1dbeaef463e7 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	657 return kind is COMMENT
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	658 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	659 return 'comment()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	660
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	661 class NodeTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	662 """Node test that matches any node."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	663 __slots__ = []
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	664 def __call__(self, kind, data, pos, namespaces, variables):
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	665 if kind is START:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	666 return True
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	667 return kind, data, pos
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	668 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	669 return 'node()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	670
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	671 class ProcessingInstructionNodeTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	672 """Node test that matches any processing instruction event."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	673 __slots__ = ['target']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	674 def __init__(self, target=None):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	675 self.target = target
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	676 def __call__(self, kind, data, pos, namespaces, variables):
330 1dbeaef463e7 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	677 return kind is PI and (not self.target or data[0] == self.target)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	678 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	679 arg = ''
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	680 if self.target:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	681 arg = '"' + self.target + '"'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	682 return 'processing-instruction(%s)' % arg
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	683
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	684 class TextNodeTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	685 """Node test that matches any text event."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	686 __slots__ = []
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	687 def __call__(self, kind, data, pos, namespaces, variables):
330 1dbeaef463e7 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	688 return kind is TEXT
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	689 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	690 return 'text()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	691
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	692 _nodetest_map = {'comment': CommentNodeTest, 'node': NodeTest,
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	693 'processing-instruction': ProcessingInstructionNodeTest,
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	694 'text': TextNodeTest}
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	695
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	696 # Functions
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	697
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	698 class Function(object):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	699 """Base class for function nodes in XPath expressions."""
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	700
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	701 class BooleanFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	702 """The `boolean` function, which converts its argument to a boolean
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	703 value.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	704 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	705 __slots__ = ['expr']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	706 def __init__(self, expr):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	707 self.expr = expr
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	708 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	709 val = self.expr(kind, data, pos, namespaces, variables)
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	710 return as_bool(val)
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	711 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	712 return 'boolean(%r)' % self.expr
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	713
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	714 class CeilingFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	715 """The `ceiling` function, which returns the nearest lower integer number
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	716 for the given number.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	717 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	718 __slots__ = ['number']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	719 def __init__(self, number):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	720 self.number = number
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	721 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	722 number = self.number(kind, data, pos, namespaces, variables)
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	723 return ceil(as_float(number))
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	724 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	725 return 'ceiling(%r)' % self.number
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	726
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	727 class ConcatFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	728 """The `concat` function, which concatenates (joins) the variable number of
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	729 strings it gets as arguments.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	730 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	731 __slots__ = ['exprs']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	732 def __init__(self, *exprs):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	733 self.exprs = exprs
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	734 def __call__(self, kind, data, pos, namespaces, variables):
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	735 strings = []
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	736 for item in [expr(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	737 for expr in self.exprs]:
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	738 strings.append(as_string(item))
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	739 return u''.join(strings)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	740 def __repr__(self):
169 ce0bfdff334c Fix syntax error in `path` module. cmlenz parents: 164 diff changeset	741 return 'concat(%s)' % ', '.join([repr(expr) for expr in self.exprs])
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	742
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	743 class ContainsFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	744 """The `contains` function, which returns whether a string contains a given
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	745 substring.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	746 """
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	747 __slots__ = ['string1', 'string2']
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	748 def __init__(self, string1, string2):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	749 self.string1 = string1
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	750 self.string2 = string2
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	751 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	752 string1 = self.string1(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	753 string2 = self.string2(kind, data, pos, namespaces, variables)
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	754 return as_string(string2) in as_string(string1)
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	755 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	756 return 'contains(%r, %r)' % (self.string1, self.string2)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	757
534 cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	758 class MatchesFunction(Function):
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	759 """The `matches` function, which returns whether a string matches a regular
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	760 expression.
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	761 """
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	762 __slots__ = ['string1', 'string2']
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	763 flag_mapping = {'s': re.S, 'm': re.M, 'i': re.I, 'x': re.X}
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	764
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	765 def __init__(self, string1, string2, flags=''):
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	766 self.string1 = string1
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	767 self.string2 = string2
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	768 self.flags = self._map_flags(flags)
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	769 def __call__(self, kind, data, pos, namespaces, variables):
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	770 string1 = as_string(self.string1(kind, data, pos, namespaces, variables))
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	771 string2 = as_string(self.string2(kind, data, pos, namespaces, variables))
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	772 return re.search(string2, string1, self.flags)
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	773 def _map_flags(self, flags):
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	774 return reduce(lambda a, b: a \| b,
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	775 [self.flag_map[flag] for flag in flags], re.U)
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	776 def __repr__(self):
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	777 return 'contains(%r, %r)' % (self.string1, self.string2)
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	778
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	779 class FalseFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	780 """The `false` function, which always returns the boolean `false` value."""
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	781 __slots__ = []
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	782 def __call__(self, kind, data, pos, namespaces, variables):
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	783 return False
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	784 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	785 return 'false()'
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	786
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	787 class FloorFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	788 """The `ceiling` function, which returns the nearest higher integer number
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	789 for the given number.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	790 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	791 __slots__ = ['number']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	792 def __init__(self, number):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	793 self.number = number
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	794 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	795 number = self.number(kind, data, pos, namespaces, variables)
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	796 return floor(as_float(number))
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	797 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	798 return 'floor(%r)' % self.number
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	799
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	800 class LocalNameFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	801 """The `local-name` function, which returns the local name of the current
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	802 element.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	803 """
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	804 __slots__ = []
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	805 def __call__(self, kind, data, pos, namespaces, variables):
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	806 if kind is START:
234 4501f2fef82f * Minor simplification of XPath engine. cmlenz parents: 230 diff changeset	807 return data[0].localname
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	808 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	809 return 'local-name()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	810
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	811 class NameFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	812 """The `name` function, which returns the qualified name of the current
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	813 element.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	814 """
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	815 __slots__ = []
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	816 def __call__(self, kind, data, pos, namespaces, variables):
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	817 if kind is START:
234 4501f2fef82f * Minor simplification of XPath engine. cmlenz parents: 230 diff changeset	818 return data[0]
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	819 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	820 return 'name()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	821
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	822 class NamespaceUriFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	823 """The `namespace-uri` function, which returns the namespace URI of the
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	824 current element.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	825 """
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	826 __slots__ = []
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	827 def __call__(self, kind, data, pos, namespaces, variables):
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	828 if kind is START:
234 4501f2fef82f * Minor simplification of XPath engine. cmlenz parents: 230 diff changeset	829 return data[0].namespace
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	830 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	831 return 'namespace-uri()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	832
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	833 class NotFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	834 """The `not` function, which returns the negated boolean value of its
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	835 argument.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	836 """
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	837 __slots__ = ['expr']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	838 def __init__(self, expr):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	839 self.expr = expr
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	840 def __call__(self, kind, data, pos, namespaces, variables):
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	841 return not as_bool(self.expr(kind, data, pos, namespaces, variables))
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	842 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	843 return 'not(%s)' % self.expr
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	844
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	845 class NormalizeSpaceFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	846 """The `normalize-space` function, which removes leading and trailing
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	847 whitespace in the given string, and replaces multiple adjacent whitespace
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	848 characters inside the string with a single space.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	849 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	850 __slots__ = ['expr']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	851 _normalize = re.compile(r'\s{2,}').sub
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	852 def __init__(self, expr):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	853 self.expr = expr
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	854 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	855 string = self.expr(kind, data, pos, namespaces, variables)
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	856 return self._normalize(' ', as_string(string).strip())
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	857 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	858 return 'normalize-space(%s)' % repr(self.expr)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	859
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	860 class NumberFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	861 """The `number` function that converts its argument to a number."""
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	862 __slots__ = ['expr']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	863 def __init__(self, expr):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	864 self.expr = expr
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	865 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	866 val = self.expr(kind, data, pos, namespaces, variables)
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	867 return as_float(val)
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	868 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	869 return 'number(%r)' % self.expr
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	870
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	871 class RoundFunction(Function):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	872 """The `round` function, which returns the nearest integer number for the
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	873 given number.
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	874 """
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	875 __slots__ = ['number']
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	876 def __init__(self, number):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	877 self.number = number
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	878 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	879 number = self.number(kind, data, pos, namespaces, variables)
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	880 return round(as_float(number))
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	881 def __repr__(self):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	882 return 'round(%r)' % self.number
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	883
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	884 class StartsWithFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	885 """The `starts-with` function that returns whether one string starts with
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	886 a given substring.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	887 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	888 __slots__ = ['string1', 'string2']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	889 def __init__(self, string1, string2):
282 db5bdeca9192 Fix `starts-with()` XPath function so that it actually compares the two strings. Closes #61. cmlenz parents: 259 diff changeset	890 self.string1 = string1
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	891 self.string2 = string2
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	892 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	893 string1 = self.string1(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	894 string2 = self.string2(kind, data, pos, namespaces, variables)
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	895 return as_string(string1).startswith(as_string(string2))
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	896 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	897 return 'starts-with(%r, %r)' % (self.string1, self.string2)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	898
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	899 class StringLengthFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	900 """The `string-length` function that returns the length of the given
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	901 string.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	902 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	903 __slots__ = ['expr']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	904 def __init__(self, expr):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	905 self.expr = expr
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	906 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	907 string = self.expr(kind, data, pos, namespaces, variables)
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	908 return len(as_string(string))
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	909 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	910 return 'string-length(%r)' % self.expr
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	911
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	912 class SubstringFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	913 """The `substring` function that returns the part of a string that starts
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	914 at the given offset, and optionally limited to the given length.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	915 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	916 __slots__ = ['string', 'start', 'length']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	917 def __init__(self, string, start, length=None):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	918 self.string = string
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	919 self.start = start
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	920 self.length = length
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	921 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	922 string = self.string(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	923 start = self.start(kind, data, pos, namespaces, variables)
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	924 length = 0
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	925 if self.length is not None:
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	926 length = self.length(kind, data, pos, namespaces, variables)
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	927 return string[as_long(start):len(as_string(string)) - as_long(length)]
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	928 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	929 if self.length is not None:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	930 return 'substring(%r, %r, %r)' % (self.string, self.start,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	931 self.length)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	932 else:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	933 return 'substring(%r, %r)' % (self.string, self.start)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	934
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	935 class SubstringAfterFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	936 """The `substring-after` function that returns the part of a string that
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	937 is found after the given substring.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	938 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	939 __slots__ = ['string1', 'string2']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	940 def __init__(self, string1, string2):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	941 self.string1 = string1
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	942 self.string2 = string2
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	943 def __call__(self, kind, data, pos, namespaces, variables):
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	944 string1 = as_string(self.string1(kind, data, pos, namespaces, variables))
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	945 string2 = as_string(self.string2(kind, data, pos, namespaces, variables))
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	946 index = string1.find(string2)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	947 if index >= 0:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	948 return string1[index + len(string2):]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	949 return u''
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	950 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	951 return 'substring-after(%r, %r)' % (self.string1, self.string2)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	952
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	953 class SubstringBeforeFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	954 """The `substring-before` function that returns the part of a string that
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	955 is found before the given substring.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	956 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	957 __slots__ = ['string1', 'string2']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	958 def __init__(self, string1, string2):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	959 self.string1 = string1
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	960 self.string2 = string2
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	961 def __call__(self, kind, data, pos, namespaces, variables):
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	962 string1 = as_string(self.string1(kind, data, pos, namespaces, variables))
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	963 string2 = as_string(self.string2(kind, data, pos, namespaces, variables))
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	964 index = string1.find(string2)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	965 if index >= 0:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	966 return string1[:index]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	967 return u''
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	968 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	969 return 'substring-after(%r, %r)' % (self.string1, self.string2)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	970
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	971 class TranslateFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	972 """The `translate` function that translates a set of characters in a
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	973 string to target set of characters.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	974 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	975 __slots__ = ['string', 'fromchars', 'tochars']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	976 def __init__(self, string, fromchars, tochars):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	977 self.string = string
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	978 self.fromchars = fromchars
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	979 self.tochars = tochars
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	980 def __call__(self, kind, data, pos, namespaces, variables):
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	981 string = as_string(self.string(kind, data, pos, namespaces, variables))
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	982 fromchars = as_string(self.fromchars(kind, data, pos, namespaces, variables))
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	983 tochars = as_string(self.tochars(kind, data, pos, namespaces, variables))
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	984 table = dict(zip([ord(c) for c in fromchars],
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	985 [ord(c) for c in tochars]))
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	986 return string.translate(table)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	987 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	988 return 'translate(%r, %r, %r)' % (self.string, self.fromchars,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	989 self.tochars)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	990
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	991 class TrueFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	992 """The `true` function, which always returns the boolean `true` value."""
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	993 __slots__ = []
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	994 def __call__(self, kind, data, pos, namespaces, variables):
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	995 return True
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	996 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	997 return 'true()'
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	998
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	999 _function_map = {'boolean': BooleanFunction, 'ceiling': CeilingFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	1000 'concat': ConcatFunction, 'contains': ContainsFunction,
534 cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	1001 'matches': MatchesFunction, 'false': FalseFunction, 'floor':
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	1002 FloorFunction, 'local-name': LocalNameFunction, 'name':
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	1003 NameFunction, 'namespace-uri': NamespaceUriFunction,
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	1004 'normalize-space': NormalizeSpaceFunction, 'not': NotFunction,
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1005 'number': NumberFunction, 'round': RoundFunction,
534 cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	1006 'starts-with': StartsWithFunction, 'string-length':
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	1007 StringLengthFunction, 'substring': SubstringFunction,
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	1008 'substring-after': SubstringAfterFunction, 'substring-before':
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	1009 SubstringBeforeFunction, 'translate': TranslateFunction,
cccb6c748609 Add XPath `matches()` function which, of course, supports the Python regular athomas parents: 518 diff changeset	1010 'true': TrueFunction}
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1011
179 a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	1012 # Literals & Variables
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1013
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	1014 class Literal(object):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	1015 """Abstract base class for literal nodes."""
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	1016
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	1017 class StringLiteral(Literal):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1018 """A string literal node."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1019 __slots__ = ['text']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1020 def __init__(self, text):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1021 self.text = text
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1022 def __call__(self, kind, data, pos, namespaces, variables):
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	1023 return self.text
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1024 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1025 return '"%s"' % self.text
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1026
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	1027 class NumberLiteral(Literal):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1028 """A number literal node."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1029 __slots__ = ['number']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1030 def __init__(self, number):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1031 self.number = number
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1032 def __call__(self, kind, data, pos, namespaces, variables):
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	1033 return self.number
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1034 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1035 return str(self.number)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1036
179 a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	1037 class VariableReference(Literal):
a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	1038 """A variable reference node."""
a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	1039 __slots__ = ['name']
a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	1040 def __init__(self, name):
a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	1041 self.name = name
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1042 def __call__(self, kind, data, pos, namespaces, variables):
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	1043 return variables.get(self.name)
179 a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	1044 def __repr__(self):
215 e92135672812 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	1045 return str(self.name)
179 a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	1046
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1047 # Operators
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1048
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1049 class AndOperator(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1050 """The boolean operator `and`."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1051 __slots__ = ['lval', 'rval']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1052 def __init__(self, lval, rval):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1053 self.lval = lval
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1054 self.rval = rval
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1055 def __call__(self, kind, data, pos, namespaces, variables):
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	1056 lval = as_bool(self.lval(kind, data, pos, namespaces, variables))
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1057 if not lval:
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1058 return False
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1059 rval = self.rval(kind, data, pos, namespaces, variables)
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	1060 return as_bool(rval)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1061 def __repr__(self):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1062 return '%s and %s' % (self.lval, self.rval)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1063
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1064 class EqualsOperator(object):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1065 """The equality operator `=`."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1066 __slots__ = ['lval', 'rval']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1067 def __init__(self, lval, rval):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1068 self.lval = lval
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1069 self.rval = rval
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1070 def __call__(self, kind, data, pos, namespaces, variables):
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	1071 lval = as_scalar(self.lval(kind, data, pos, namespaces, variables))
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	1072 rval = as_scalar(self.rval(kind, data, pos, namespaces, variables))
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1073 return lval == rval
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1074 def __repr__(self):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1075 return '%s=%s' % (self.lval, self.rval)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1076
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1077 class NotEqualsOperator(object):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1078 """The equality operator `!=`."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1079 __slots__ = ['lval', 'rval']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1080 def __init__(self, lval, rval):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1081 self.lval = lval
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1082 self.rval = rval
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1083 def __call__(self, kind, data, pos, namespaces, variables):
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	1084 lval = as_scalar(self.lval(kind, data, pos, namespaces, variables))
97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	1085 rval = as_scalar(self.rval(kind, data, pos, namespaces, variables))
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1086 return lval != rval
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1087 def __repr__(self):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1088 return '%s!=%s' % (self.lval, self.rval)
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1089
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1090 class OrOperator(object):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1091 """The boolean operator `or`."""
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1092 __slots__ = ['lval', 'rval']
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1093 def __init__(self, lval, rval):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1094 self.lval = lval
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1095 self.rval = rval
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1096 def __call__(self, kind, data, pos, namespaces, variables):
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	1097 lval = as_bool(self.lval(kind, data, pos, namespaces, variables))
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1098 if lval:
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1099 return True
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1100 rval = self.rval(kind, data, pos, namespaces, variables)
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	1101 return as_bool(rval)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1102 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1103 return '%s or %s' % (self.lval, self.rval)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1104
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1105 class GreaterThanOperator(object):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1106 """The relational operator `>` (greater than)."""
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1107 __slots__ = ['lval', 'rval']
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1108 def __init__(self, lval, rval):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1109 self.lval = lval
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1110 self.rval = rval
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1111 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1112 lval = self.lval(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1113 rval = self.rval(kind, data, pos, namespaces, variables)
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	1114 return as_float(lval) > as_float(rval)
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1115 def __repr__(self):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1116 return '%s>%s' % (self.lval, self.rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1117
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1118 class GreaterThanOrEqualOperator(object):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1119 """The relational operator `>=` (greater than or equal)."""
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1120 __slots__ = ['lval', 'rval']
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1121 def __init__(self, lval, rval):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1122 self.lval = lval
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1123 self.rval = rval
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1124 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1125 lval = self.lval(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1126 rval = self.rval(kind, data, pos, namespaces, variables)
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	1127 return as_float(lval) >= as_float(rval)
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1128 def __repr__(self):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1129 return '%s>=%s' % (self.lval, self.rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1130
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1131 class LessThanOperator(object):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1132 """The relational operator `<` (less than)."""
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1133 __slots__ = ['lval', 'rval']
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1134 def __init__(self, lval, rval):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1135 self.lval = lval
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1136 self.rval = rval
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1137 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1138 lval = self.lval(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1139 rval = self.rval(kind, data, pos, namespaces, variables)
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	1140 return as_float(lval) < as_float(rval)
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1141 def __repr__(self):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1142 return '%s<%s' % (self.lval, self.rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1143
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1144 class LessThanOrEqualOperator(object):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1145 """The relational operator `<=` (less than or equal)."""
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1146 __slots__ = ['lval', 'rval']
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1147 def __init__(self, lval, rval):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1148 self.lval = lval
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1149 self.rval = rval
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1150 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1151 lval = self.lval(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1152 rval = self.rval(kind, data, pos, namespaces, variables)
518 97cdadc17e20 Attributes selected with an XPath are now returned as an `Attrs()` object in athomas parents: 516 diff changeset	1153 return as_float(lval) <= as_float(rval)
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1154 def __repr__(self):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1155 return '%s<=%s' % (self.lval, self.rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1156
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1157 _operator_map = {'=': EqualsOperator, '!=': NotEqualsOperator,
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1158 '>': GreaterThanOperator, '>=': GreaterThanOrEqualOperator,
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1159 '<': LessThanOperator, '>=': LessThanOrEqualOperator}
333 b70563ade748 Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	1160
b70563ade748 Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	1161
b70563ade748 Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	1162 _DOTSLASHSLASH = (DESCENDANT_OR_SELF, PrincipalTypeTest(None), ())

Mercurial > genshi > genshi-test

annotate genshi/path.py @ 586:5413c9d95db1