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

annotate genshi/path.py @ 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.

author	cmlenz
date	Fri, 22 Sep 2006 11:40:24 +0000
parents	8fc0abce0801
children	db5bdeca9192

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>
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	18 ... <items count="2">
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>
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	25 ... </items>
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	26 ... </doc>''')
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	27 >>> print doc.select('items/item[@status="closed"]/summary/text()')
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	28 Bar
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	29
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	30 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	31 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	32 """
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	33
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	34 from math import ceil, floor
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	35 import re
821114ec4f69 Initial import. cmlenz parents: diff changeset	36
230 24757b771651 Renamed Markup to Genshi in repository. cmlenz parents: 228 diff changeset	37 from genshi.core import Stream, Attrs, Namespace, QName
24757b771651 Renamed Markup to Genshi in repository. cmlenz parents: 228 diff changeset	38 from genshi.core import START, END, TEXT, COMMENT, PI
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	39
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	40 __all__ = ['Path', 'PathSyntaxError']
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	41
821114ec4f69 Initial import. cmlenz parents: diff changeset	42
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	43 class Axis(object):
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	44 """Defines constants for the various supported XPath axes."""
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	45
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	46 ATTRIBUTE = 'attribute'
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	47 CHILD = 'child'
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	48 DESCENDANT = 'descendant'
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	49 DESCENDANT_OR_SELF = 'descendant-or-self'
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	50 SELF = 'self'
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	51
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	52 def forname(cls, name):
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	53 """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	54 axis was defined.
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	55 """
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	56 return getattr(cls, name.upper().replace('-', '_'), None)
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	57 forname = classmethod(forname)
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	58
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 ATTRIBUTE = Axis.ATTRIBUTE
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	61 CHILD = Axis.CHILD
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	62 DESCENDANT = Axis.DESCENDANT
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	63 DESCENDANT_OR_SELF = Axis.DESCENDANT_OR_SELF
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	64 SELF = Axis.SELF
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	65
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	66
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	67 class Path(object):
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	68 """Implements basic XPath support on streams.
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	69
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	70 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	71 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	72 substream matching that path.
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	73 """
821114ec4f69 Initial import. cmlenz parents: diff changeset	74
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	75 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	76 """Create the path object from a string.
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	77
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	78 @param text: the path expression
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	79 """
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	80 self.source = text
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	81 self.paths = PathParser(text, filename, lineno).parse()
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	82
821114ec4f69 Initial import. cmlenz parents: diff changeset	83 def __repr__(self):
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	84 paths = []
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	85 for path in self.paths:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	86 steps = []
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	87 for axis, nodetest, predicates in path:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	88 steps.append('%s::%s' % (axis, nodetest))
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	89 for predicate in predicates:
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	90 steps[-1] += '[%s]' % predicate
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	91 paths.append('/'.join(steps))
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	92 return '<%s "%s">' % (self.__class__.__name__, '\|'.join(paths))
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	93
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	94 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	95 """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	96
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	97 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	98
230 24757b771651 Renamed Markup to Genshi in repository. cmlenz parents: 228 diff changeset	99 >>> from genshi.input import XML
33 0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	100 >>> xml = XML('<root><elem><child>Text</child></elem></root>')
61 33c2702cf6da Use a different namespace than Kid uses. cmlenz parents: 38 diff changeset	101
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	102 >>> print Path('.//child').select(xml)
33 0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	103 <child>Text</child>
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	104
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	105 >>> print Path('.//child/text()').select(xml)
33 0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	106 Text
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	107
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	108 @param stream: the stream to select from
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	109 @param namespaces: (optional) a mapping of namespace prefixes to URIs
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	110 @param variables: (optional) a mapping of variable names to values
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	111 @return: the substream matching the path, or an empty stream
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	112 """
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	113 if namespaces is None:
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	114 namespaces = {}
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	115 if variables is None:
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	116 variables = {}
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	117 stream = iter(stream)
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	118 def _generate():
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	119 test = self.test()
821114ec4f69 Initial import. cmlenz parents: diff changeset	120 for kind, data, pos in stream:
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	121 result = test(kind, data, pos, namespaces, variables)
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	122 if result is True:
821114ec4f69 Initial import. cmlenz parents: diff changeset	123 yield kind, data, pos
821114ec4f69 Initial import. cmlenz parents: diff changeset	124 depth = 1
821114ec4f69 Initial import. cmlenz parents: diff changeset	125 while depth > 0:
73 b0fd16111f2e Some more performance tweaks. cmlenz parents: 70 diff changeset	126 subkind, subdata, subpos = stream.next()
b0fd16111f2e Some more performance tweaks. cmlenz parents: 70 diff changeset	127 if subkind is START:
b0fd16111f2e Some more performance tweaks. cmlenz parents: 70 diff changeset	128 depth += 1
b0fd16111f2e Some more performance tweaks. cmlenz parents: 70 diff changeset	129 elif subkind is END:
b0fd16111f2e Some more performance tweaks. cmlenz parents: 70 diff changeset	130 depth -= 1
b0fd16111f2e Some more performance tweaks. cmlenz parents: 70 diff changeset	131 yield subkind, subdata, subpos
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	132 test(subkind, subdata, subpos, namespaces, variables)
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	133 elif result:
821114ec4f69 Initial import. cmlenz parents: diff changeset	134 yield result
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	135 return Stream(_generate())
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	136
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	137 def test(self, ignore_context=False):
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	138 """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	139 a specific stream event.
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	140
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	141 The function returned expects the positional arguments `kind`, `data`,
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	142 `pos` (basically an unpacked stream event), as well as `namespaces`
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	143 and `variables`. The latter two are a mapping of namespace prefixes to
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	144 URIs, and a mapping of variable names to values, respectively.
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	145
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	146 If the path matches the event, the function returns the match (for
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	147 example, a `START` or `TEXT` event.) Otherwise, it returns `None`.
33 0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	148
230 24757b771651 Renamed Markup to Genshi in repository. cmlenz parents: 228 diff changeset	149 >>> from genshi.input import XML
33 0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	150 >>> xml = XML('<root><elem><child id="1"/></elem><child id="2"/></root>')
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	151 >>> test = Path('child').test()
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	152 >>> for kind, data, pos in xml:
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	153 ... if test(kind, data, pos, {}, {}):
33 0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	154 ... print kind, data
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	155 START (u'child', [(u'id', u'2')])
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	156 """
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	157 paths = [(p, len(p), [0], [], [0] * len(p)) for p in self.paths]
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	158
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	159 def _test(kind, data, pos, namespaces, variables):
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	160 retval = None
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	161 for steps, size, cursors, cutoff, counter in paths:
f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	162
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	163 # 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	164 if kind is END:
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	165 if cursors:
f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	166 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	167 continue
223 861105f3afe3 Fix typo introduced in [272]. cmlenz parents: 217 diff changeset	168 elif kind is START:
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	169 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	170
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	171 if retval or not cursors:
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	172 continue
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	173 cursor = cursors[-1]
f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	174 depth = len(cursors)
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	175
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	176 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	177 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	178
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	179 ctxtnode = not ignore_context and kind is START \
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	180 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	181 matched = None
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	182 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	183 # Fetch the next location step
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	184 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	185
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	186 # 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	187 # 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	188 # 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	189 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	190 break
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	191
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	192 # 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	193 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	194
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	195 # Perform the actual node test
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	196 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	197
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	198 # 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	199 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	200
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	201 # 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	202 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	203 for predicate in predicates:
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	204 pretval = predicate(kind, data, pos, namespaces,
f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	205 variables)
f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	206 if type(pretval) is float:
f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	207 counter[cursor] += 1
f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	208 if counter[cursor] != int(pretval):
f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	209 pretval = False
f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	210 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	211 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	212 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	213
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 # 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	215 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	216 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	217 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	218 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	219 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	220 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	221 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	222 cursor += 1
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	223 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	224 cutoff[:] = []
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	225
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	226 elif not ignore_context and kind is START:
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	227 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	228
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 if last_step and not ignore_context and kind is START:
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	230 if (axis is not DESCENDANT and
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	231 axis is not DESCENDANT_OR_SELF):
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	232 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	233
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	234 if kind is START and not last_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	235 next_axis = steps[cursor][0]
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	236 if next_axis is ATTRIBUTE:
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	237 # If the axis of the next location step is 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	238 # attribute axis, we need to move on to processing
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	239 # that step without waiting for the next markup
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	240 # event
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 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	242
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 # 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	244 # axis isn't "self"
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	245 if last_step or (axis is not SELF and
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	246 axis is not 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	247 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	248
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 if kind is START and axis is not DESCENDANT \
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 and axis is not DESCENDANT_OR_SELF:
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	251 # 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	252 # 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	253 # cursor back to the previous closure and retest that
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	254 # against the current element
215 e92135672812 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	255 backsteps = [(k, d, p) for k, d, p in steps[:cursor]
e92135672812 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	256 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	257 backsteps.reverse()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	258 for axis, nodetest, predicates in backsteps:
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	259 matched = nodetest(kind, data, pos, namespaces,
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	260 variables)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	261 if not matched:
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	262 cursor -= 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	263 cutoff[:] = []
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	264 break
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	265 cursors[-1] = cursor
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	266
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	267 return retval
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	268
821114ec4f69 Initial import. cmlenz parents: diff changeset	269 return _test
821114ec4f69 Initial import. cmlenz parents: diff changeset	270
821114ec4f69 Initial import. cmlenz parents: diff changeset	271
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	272 class PathSyntaxError(Exception):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	273 """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	274
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	275 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	276 if filename:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	277 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	278 Exception.__init__(self, message)
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	279 self.filename = filename
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	280 self.lineno = lineno
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	281 self.offset = offset
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	282
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	283
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	284 class PathParser(object):
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	285 """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	286
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	287 _QUOTES = (("'", "'"), ('"', '"'))
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	288 _TOKENS = ('::', ':', '..', '.', '//', '/', '[', ']', '()', '(', ')', '@',
179 a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	289 '=', '!=', '!', '\|', ',', '>=', '>', '<=', '<', '$')
163 9df6f057efd3 Support for XPath number literals including decimal places. cmlenz parents: 162 diff changeset	290 _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	291 '\|'.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	292 ''.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	293
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	294 def __init__(self, text, filename=None, lineno=-1):
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	295 self.filename = filename
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	296 self.lineno = lineno
163 9df6f057efd3 Support for XPath number literals including decimal places. cmlenz parents: 162 diff changeset	297 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	298 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	299 self._tokenize(text)])
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	300 self.pos = 0
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	301
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	302 # Tokenizer
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	303
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	304 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	305 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	306
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	307 def next_token(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	308 self.pos += 1
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	309 return self.tokens[self.pos]
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	310
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	311 def peek_token(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	312 if not self.at_end:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	313 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	314 return None
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	315
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	316 # Recursive descent parser
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	317
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	318 def parse(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	319 """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	320 tests.
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	321
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	322 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	323 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	324 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	325
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	326 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	327 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	328 """
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	329 paths = [self._location_path()]
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	330 while self.cur_token == '\|':
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	331 self.next_token()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	332 paths.append(self._location_path())
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	333 if not self.at_end:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	334 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	335 % 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	336 return paths
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	337
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	338 def _location_path(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	339 steps = []
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	340 while True:
215 e92135672812 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	341 if self.cur_token.startswith('/'):
e92135672812 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	342 if self.cur_token == '//':
e92135672812 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	343 steps.append((DESCENDANT_OR_SELF, NodeTest(), []))
e92135672812 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	344 elif not steps:
e92135672812 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	345 raise PathSyntaxError('Absolute location paths not '
e92135672812 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	346 'supported', self.filename,
e92135672812 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	347 self.lineno)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	348 self.next_token()
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	349
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	350 axis, nodetest, predicates = self._location_step()
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	351 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	352 axis = CHILD
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	353 steps.append((axis, nodetest, predicates))
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	354
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	355 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	356 break
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	357
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	358 return steps
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	359
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	360 def _location_step(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	361 if self.cur_token == '@':
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	362 axis = ATTRIBUTE
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	363 self.next_token()
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	364 elif self.cur_token == '.':
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	365 axis = SELF
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	366 elif self.cur_token == '..':
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	367 raise PathSyntaxError('Unsupported axis "parent"', self.filename,
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	368 self.lineno)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	369 elif self.peek_token() == '::':
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	370 axis = Axis.forname(self.cur_token)
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	371 if axis is None:
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	372 raise PathSyntaxError('Unsupport axis "%s"' % axis,
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	373 self.filename, self.lineno)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	374 self.next_token()
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	375 self.next_token()
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	376 else:
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	377 axis = None
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	378 nodetest = self._node_test(axis or CHILD)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	379 predicates = []
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	380 while self.cur_token == '[':
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	381 predicates.append(self._predicate())
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	382 return axis, nodetest, predicates
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	383
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	384 def _node_test(self, axis=None):
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	385 test = prefix = None
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	386 next_token = self.peek_token()
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	387 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	388 test = self._node_type()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	389
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	390 elif next_token == ':': # Namespace prefix
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	391 prefix = self.cur_token
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	392 self.next_token()
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	393 localname = self.next_token()
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	394 if localname == '*':
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	395 test = QualifiedPrincipalTypeTest(axis, prefix)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	396 else:
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	397 test = QualifiedNameTest(axis, prefix, localname)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	398
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	399 else: # Name test
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	400 if self.cur_token == '*':
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	401 test = PrincipalTypeTest(axis)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	402 elif self.cur_token == '.':
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	403 test = NodeTest()
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	404 else:
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	405 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	406
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	407 if not self.at_end:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	408 self.next_token()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	409 return test
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	410
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	411 def _node_type(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	412 name = self.cur_token
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	413 self.next_token()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	414
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	415 args = []
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	416 if self.cur_token != '()':
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	417 # The processing-instruction() function optionally accepts the
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	418 # name of the PI as argument, which must be a literal string
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	419 self.next_token() # (
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	420 if self.cur_token != ')':
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	421 string = self.cur_token
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	422 if (string[0], string[-1]) in self._QUOTES:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	423 string = string[1:-1]
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	424 args.append(string)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	425
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	426 cls = _nodetest_map.get(name)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	427 if not cls:
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	428 raise PathSyntaxError('%s() not allowed here' % name, self.filename,
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	429 self.lineno)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	430 return cls(*args)
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	431
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	432 def _predicate(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	433 assert self.cur_token == '['
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	434 self.next_token()
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	435 expr = self._or_expr()
121 22a7080ed242 Added support for the XPath functions `name()`, `namespace-uri()`, `local-name()`, and `not()`. cmlenz parents: 114 diff changeset	436 if self.cur_token != ']':
22a7080ed242 Added support for the XPath functions `name()`, `namespace-uri()`, `local-name()`, and `not()`. cmlenz parents: 114 diff changeset	437 raise PathSyntaxError('Expected "]" to close predicate, '
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	438 'but found "%s"' % self.cur_token,
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	439 self.filename, self.lineno)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	440 if not self.at_end:
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	441 self.next_token()
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	442 return expr
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	443
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	444 def _or_expr(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	445 expr = self._and_expr()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	446 while self.cur_token == 'or':
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	447 self.next_token()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	448 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	449 return expr
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	450
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	451 def _and_expr(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	452 expr = self._equality_expr()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	453 while self.cur_token == 'and':
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	454 self.next_token()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	455 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	456 return expr
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	457
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	458 def _equality_expr(self):
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	459 expr = self._relational_expr()
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	460 while self.cur_token in ('=', '!='):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	461 op = _operator_map[self.cur_token]
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	462 self.next_token()
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	463 expr = op(expr, self._relational_expr())
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	464 return expr
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	465
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	466 def _relational_expr(self):
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	467 expr = self._primary_expr()
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	468 while self.cur_token in ('>', '>=', '<', '>='):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	469 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	470 self.next_token()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	471 expr = op(expr, self._primary_expr())
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 _primary_expr(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	475 token = self.cur_token
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	476 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	477 self.next_token()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	478 return StringLiteral(token[1:-1])
163 9df6f057efd3 Support for XPath number literals including decimal places. cmlenz parents: 162 diff changeset	479 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	480 self.next_token()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	481 return NumberLiteral(float(token))
179 a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	482 elif token == '$':
a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	483 token = self.next_token()
a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	484 self.next_token()
a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	485 return VariableReference(token)
121 22a7080ed242 Added support for the XPath functions `name()`, `namespace-uri()`, `local-name()`, and `not()`. cmlenz parents: 114 diff changeset	486 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	487 return self._function_call()
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	488 else:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	489 axis = None
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	490 if token == '@':
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	491 axis = ATTRIBUTE
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	492 self.next_token()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	493 return self._node_test(axis)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	494
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	495 def _function_call(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	496 name = self.cur_token
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	497 if self.next_token() == '()':
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	498 args = []
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	499 else:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	500 assert self.cur_token == '('
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	501 self.next_token()
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	502 args = [self._or_expr()]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	503 while self.cur_token == ',':
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	504 self.next_token()
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	505 args.append(self._or_expr())
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	506 if not self.cur_token == ')':
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	507 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	508 '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	509 self.filename, self.lineno)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	510 self.next_token()
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	511 cls = _function_map.get(name)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	512 if not cls:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	513 raise PathSyntaxError('Unsupported function "%s"' % name,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	514 self.filename, self.lineno)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	515 return cls(*args)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	516
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	517
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	518 # Node tests
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	519
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	520 class PrincipalTypeTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	521 """Node test that matches any event with the given principal type."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	522 __slots__ = ['principal_type']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	523 def __init__(self, principal_type):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	524 self.principal_type = principal_type
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	525 def __call__(self, kind, data, pos, namespaces, variables):
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	526 if kind is START:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	527 if self.principal_type is ATTRIBUTE:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	528 return data[1] or None
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	529 else:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	530 return True
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	531 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	532 return '*'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	533
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	534 class QualifiedPrincipalTypeTest(object):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	535 """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	536 specific namespace."""
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	537 __slots__ = ['principal_type', 'prefix']
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	538 def __init__(self, principal_type, prefix):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	539 self.principal_type = principal_type
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	540 self.prefix = prefix
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	541 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	542 namespace = Namespace(namespaces.get(self.prefix))
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	543 if kind is START:
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	544 if self.principal_type is ATTRIBUTE and data[1]:
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	545 return Attrs([(name, value) for name, value in data[1]
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	546 if name in namespace]) or None
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	547 else:
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	548 return data[0] in namespace
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	549 def __repr__(self):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	550 return '%s:*' % self.prefix
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	551
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	552 class LocalNameTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	553 """Node test that matches any event with the given prinipal type and
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	554 local name.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	555 """
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	556 __slots__ = ['principal_type', 'name']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	557 def __init__(self, principal_type, name):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	558 self.principal_type = principal_type
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	559 self.name = name
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	560 def __call__(self, kind, data, pos, namespaces, variables):
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	561 if kind is START:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	562 if self.principal_type is ATTRIBUTE and self.name in data[1]:
234 4501f2fef82f * Minor simplification of XPath engine. cmlenz parents: 230 diff changeset	563 return data[1].get(self.name)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	564 else:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	565 return data[0].localname == self.name
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	566 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	567 return self.name
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	568
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	569 class QualifiedNameTest(object):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	570 """Node test that matches any event with the given prinipal type and
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	571 qualified name.
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	572 """
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	573 __slots__ = ['principal_type', 'prefix', 'name']
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	574 def __init__(self, principal_type, prefix, name):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	575 self.principal_type = principal_type
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	576 self.prefix = prefix
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	577 self.name = name
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	578 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	579 qname = QName('%s}%s' % (namespaces.get(self.prefix), self.name))
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	580 if kind is START:
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	581 if self.principal_type is ATTRIBUTE and qname in data[1]:
234 4501f2fef82f * Minor simplification of XPath engine. cmlenz parents: 230 diff changeset	582 return data[1].get(qname)
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	583 else:
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	584 return data[0] == qname
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	585 def __repr__(self):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	586 return '%s:%s' % (self.prefix, self.name)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	587
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	588 class CommentNodeTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	589 """Node test that matches any comment events."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	590 __slots__ = []
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	591 def __call__(self, kind, data, pos, namespaces, variables):
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	592 return kind is COMMENT and (kind, data, pos)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	593 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	594 return 'comment()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	595
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	596 class NodeTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	597 """Node test that matches any node."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	598 __slots__ = []
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	599 def __call__(self, kind, data, pos, namespaces, variables):
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	600 if kind is START:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	601 return True
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	602 return kind, data, pos
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	603 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	604 return 'node()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	605
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	606 class ProcessingInstructionNodeTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	607 """Node test that matches any processing instruction event."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	608 __slots__ = ['target']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	609 def __init__(self, target=None):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	610 self.target = target
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	611 def __call__(self, kind, data, pos, namespaces, variables):
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	612 if kind is PI and (not self.target or data[0] == self.target):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	613 return (kind, data, pos)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	614 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	615 arg = ''
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	616 if self.target:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	617 arg = '"' + self.target + '"'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	618 return 'processing-instruction(%s)' % arg
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	619
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	620 class TextNodeTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	621 """Node test that matches any text event."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	622 __slots__ = []
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	623 def __call__(self, kind, data, pos, namespaces, variables):
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	624 return kind is TEXT and (kind, data, pos)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	625 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	626 return 'text()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	627
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	628 _nodetest_map = {'comment': CommentNodeTest, 'node': NodeTest,
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	629 'processing-instruction': ProcessingInstructionNodeTest,
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	630 'text': TextNodeTest}
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	631
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	632 # Functions
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	633
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	634 class Function(object):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	635 """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	636
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	637 class BooleanFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	638 """The `boolean` function, which converts its argument to a boolean
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	639 value.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	640 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	641 __slots__ = ['expr']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	642 def __init__(self, expr):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	643 self.expr = expr
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	644 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	645 val = self.expr(kind, data, pos, namespaces, variables)
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	646 return bool(val)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	647 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	648 return 'boolean(%r)' % self.expr
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	649
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	650 class CeilingFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	651 """The `ceiling` function, which returns the nearest lower integer number
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	652 for the given number.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	653 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	654 __slots__ = ['number']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	655 def __init__(self, number):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	656 self.number = number
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	657 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	658 number = self.number(kind, data, pos, namespaces, variables)
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	659 return ceil(float(number))
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	660 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	661 return 'ceiling(%r)' % self.number
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	662
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	663 class ConcatFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	664 """The `concat` function, which concatenates (joins) the variable number of
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	665 strings it gets as arguments.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	666 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	667 __slots__ = ['exprs']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	668 def __init__(self, *exprs):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	669 self.exprs = exprs
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	670 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	671 strings = []
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	672 for item in [expr(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	673 for expr in self.exprs]:
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	674 strings.append(item)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	675 return u''.join(strings)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	676 def __repr__(self):
169 ce0bfdff334c Fix syntax error in `path` module. cmlenz parents: 164 diff changeset	677 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	678
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	679 class ContainsFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	680 """The `contains` function, which returns whether a string contains a given
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	681 substring.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	682 """
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	683 __slots__ = ['string1', 'string2']
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	684 def __init__(self, string1, string2):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	685 self.string1 = string1
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	686 self.string2 = string2
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	687 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	688 string1 = self.string1(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	689 string2 = 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	690 return string2 in string1
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	691 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	692 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	693
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	694 class FalseFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	695 """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	696 __slots__ = []
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	697 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	698 return False
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	699 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	700 return 'false()'
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	701
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	702 class FloorFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	703 """The `ceiling` function, which returns the nearest higher integer number
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	704 for the given number.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	705 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	706 __slots__ = ['number']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	707 def __init__(self, number):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	708 self.number = number
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	709 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	710 number = self.number(kind, data, pos, namespaces, variables)
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	711 return floor(float(number))
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	712 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	713 return 'floor(%r)' % self.number
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	714
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	715 class LocalNameFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	716 """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	717 element.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	718 """
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	719 __slots__ = []
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	720 def __call__(self, kind, data, pos, namespaces, variables):
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	721 if kind is START:
234 4501f2fef82f * Minor simplification of XPath engine. cmlenz parents: 230 diff changeset	722 return data[0].localname
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	723 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	724 return 'local-name()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	725
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	726 class NameFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	727 """The `name` function, which returns the qualified name of the current
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	728 element.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	729 """
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	730 __slots__ = []
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	731 def __call__(self, kind, data, pos, namespaces, variables):
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	732 if kind is START:
234 4501f2fef82f * Minor simplification of XPath engine. cmlenz parents: 230 diff changeset	733 return data[0]
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	734 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	735 return 'name()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	736
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	737 class NamespaceUriFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	738 """The `namespace-uri` function, which returns the namespace URI of the
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	739 current element.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	740 """
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	741 __slots__ = []
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	742 def __call__(self, kind, data, pos, namespaces, variables):
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	743 if kind is START:
234 4501f2fef82f * Minor simplification of XPath engine. cmlenz parents: 230 diff changeset	744 return data[0].namespace
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	745 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	746 return 'namespace-uri()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	747
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	748 class NotFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	749 """The `not` function, which returns the negated boolean value of its
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	750 argument.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	751 """
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	752 __slots__ = ['expr']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	753 def __init__(self, expr):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	754 self.expr = expr
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	755 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	756 return not self.expr(kind, data, pos, namespaces, variables)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	757 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	758 return 'not(%s)' % self.expr
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	759
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	760 class NormalizeSpaceFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	761 """The `normalize-space` function, which removes leading and trailing
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	762 whitespace in the given string, and replaces multiple adjacent whitespace
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	763 characters inside the string with a single space.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	764 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	765 __slots__ = ['expr']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	766 _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	767 def __init__(self, expr):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	768 self.expr = expr
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	769 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	770 string = self.expr(kind, data, pos, namespaces, variables)
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	771 return self._normalize(' ', string.strip())
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	772 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	773 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	774
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	775 class NumberFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	776 """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	777 __slots__ = ['expr']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	778 def __init__(self, expr):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	779 self.expr = expr
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	780 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	781 val = self.expr(kind, data, pos, namespaces, variables)
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	782 return float(val)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	783 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	784 return 'number(%r)' % self.expr
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	785
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	786 class RoundFunction(Function):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	787 """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	788 given number.
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	789 """
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	790 __slots__ = ['number']
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	791 def __init__(self, number):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	792 self.number = number
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	793 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	794 number = self.number(kind, data, pos, namespaces, variables)
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	795 return round(float(number))
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	796 def __repr__(self):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	797 return 'round(%r)' % self.number
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	798
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	799 class StartsWithFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	800 """The `starts-with` function that returns whether one string starts with
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	801 a given substring.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	802 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	803 __slots__ = ['string1', 'string2']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	804 def __init__(self, string1, string2):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	805 self.string1 = string2
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	806 self.string2 = string2
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	807 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	808 string1 = self.string1(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	809 string2 = 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	810 return string1.startswith(string2)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	811 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	812 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	813
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	814 class StringLengthFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	815 """The `string-length` function that returns the length of the given
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	816 string.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	817 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	818 __slots__ = ['expr']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	819 def __init__(self, expr):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	820 self.expr = expr
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	821 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	822 string = self.expr(kind, data, pos, namespaces, variables)
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	823 return len(string)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	824 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	825 return 'string-length(%r)' % self.expr
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	826
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	827 class SubstringFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	828 """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	829 at the given offset, and optionally limited to the given length.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	830 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	831 __slots__ = ['string', 'start', 'length']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	832 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	833 self.string = string
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	834 self.start = start
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	835 self.length = length
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	836 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	837 string = self.string(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	838 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	839 length = 0
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	840 if self.length is not None:
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	841 length = self.length(kind, data, pos, namespaces, variables)
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	842 return string[int(start):len(string) - int(length)]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	843 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	844 if self.length is not None:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	845 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	846 self.length)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	847 else:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	848 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	849
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	850 class SubstringAfterFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	851 """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	852 is found after the given substring.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	853 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	854 __slots__ = ['string1', 'string2']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	855 def __init__(self, string1, string2):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	856 self.string1 = string1
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	857 self.string2 = string2
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	858 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	859 string1 = self.string1(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	860 string2 = 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	861 index = string1.find(string2)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	862 if index >= 0:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	863 return string1[index + len(string2):]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	864 return u''
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	865 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	866 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	867
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	868 class SubstringBeforeFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	869 """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	870 is found before the given substring.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	871 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	872 __slots__ = ['string1', 'string2']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	873 def __init__(self, string1, string2):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	874 self.string1 = string1
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	875 self.string2 = string2
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	876 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	877 string1 = self.string1(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	878 string2 = 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	879 index = string1.find(string2)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	880 if index >= 0:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	881 return string1[:index]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	882 return u''
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	883 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	884 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	885
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	886 class TranslateFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	887 """The `translate` function that translates a set of characters in a
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	888 string to target set of characters.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	889 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	890 __slots__ = ['string', 'fromchars', 'tochars']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	891 def __init__(self, string, fromchars, tochars):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	892 self.string = string
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	893 self.fromchars = fromchars
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	894 self.tochars = tochars
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	895 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	896 string = self.string(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	897 fromchars = self.fromchars(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	898 tochars = 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	899 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	900 [ord(c) for c in tochars]))
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	901 return string.translate(table)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	902 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	903 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	904 self.tochars)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	905
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	906 class TrueFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	907 """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	908 __slots__ = []
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	909 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	910 return True
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	911 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	912 return 'true()'
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	913
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	914 _function_map = {'boolean': BooleanFunction, 'ceiling': CeilingFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	915 'concat': ConcatFunction, 'contains': ContainsFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	916 'false': FalseFunction, 'floor': FloorFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	917 'local-name': LocalNameFunction, 'name': NameFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	918 'namespace-uri': NamespaceUriFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	919 'normalize-space': NormalizeSpaceFunction, 'not': NotFunction,
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	920 'number': NumberFunction, 'round': RoundFunction,
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	921 'starts-with': StartsWithFunction,
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	922 'string-length': StringLengthFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	923 'substring': SubstringFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	924 'substring-after': SubstringAfterFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	925 'substring-before': SubstringBeforeFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	926 'translate': TranslateFunction, 'true': TrueFunction}
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	927
179 a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	928 # Literals & Variables
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	929
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	930 class Literal(object):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	931 """Abstract base class for literal nodes."""
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	932
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	933 class StringLiteral(Literal):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	934 """A string literal node."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	935 __slots__ = ['text']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	936 def __init__(self, text):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	937 self.text = text
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	938 def __call__(self, kind, data, pos, namespaces, variables):
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	939 return self.text
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	940 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	941 return '"%s"' % self.text
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	942
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	943 class NumberLiteral(Literal):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	944 """A number literal node."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	945 __slots__ = ['number']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	946 def __init__(self, number):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	947 self.number = number
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	948 def __call__(self, kind, data, pos, namespaces, variables):
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	949 return self.number
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	950 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	951 return str(self.number)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	952
179 a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	953 class VariableReference(Literal):
a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	954 """A variable reference node."""
a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	955 __slots__ = ['name']
a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	956 def __init__(self, name):
a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	957 self.name = name
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	958 def __call__(self, kind, data, pos, namespaces, variables):
228 f79b20a50919 Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	959 return variables.get(self.name)
179 a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	960 def __repr__(self):
215 e92135672812 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	961 return str(self.name)
179 a2e0a7986d19 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	962
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	963 # Operators
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	964
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	965 class AndOperator(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	966 """The boolean operator `and`."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	967 __slots__ = ['lval', 'rval']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	968 def __init__(self, lval, rval):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	969 self.lval = lval
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	970 self.rval = rval
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	971 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	972 lval = self.lval(kind, data, pos, namespaces, variables)
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	973 if not lval:
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	974 return False
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	975 rval = self.rval(kind, data, pos, namespaces, variables)
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	976 return bool(rval)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	977 def __repr__(self):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	978 return '%s and %s' % (self.lval, self.rval)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	979
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	980 class EqualsOperator(object):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	981 """The equality operator `=`."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	982 __slots__ = ['lval', 'rval']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	983 def __init__(self, lval, rval):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	984 self.lval = lval
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	985 self.rval = rval
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	986 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	987 lval = self.lval(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	988 rval = self.rval(kind, data, pos, namespaces, variables)
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	989 return lval == rval
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	990 def __repr__(self):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	991 return '%s=%s' % (self.lval, self.rval)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	992
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	993 class NotEqualsOperator(object):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	994 """The equality operator `!=`."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	995 __slots__ = ['lval', 'rval']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	996 def __init__(self, lval, rval):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	997 self.lval = lval
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	998 self.rval = rval
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	999 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1000 lval = self.lval(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1001 rval = self.rval(kind, data, pos, namespaces, variables)
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1002 return lval != rval
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1003 def __repr__(self):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1004 return '%s!=%s' % (self.lval, self.rval)
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1005
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1006 class OrOperator(object):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1007 """The boolean operator `or`."""
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1008 __slots__ = ['lval', 'rval']
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1009 def __init__(self, lval, rval):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1010 self.lval = lval
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1011 self.rval = rval
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1012 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1013 lval = self.lval(kind, data, pos, namespaces, variables)
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1014 if lval:
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1015 return True
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1016 rval = self.rval(kind, data, pos, namespaces, variables)
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1017 return bool(rval)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1018 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1019 return '%s or %s' % (self.lval, self.rval)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1020
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1021 class GreaterThanOperator(object):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1022 """The relational operator `>` (greater than)."""
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1023 __slots__ = ['lval', 'rval']
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1024 def __init__(self, lval, rval):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1025 self.lval = lval
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1026 self.rval = rval
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1027 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1028 lval = self.lval(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1029 rval = self.rval(kind, data, pos, namespaces, variables)
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1030 return float(lval) > float(rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1031 def __repr__(self):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1032 return '%s>%s' % (self.lval, self.rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1033
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1034 class GreaterThanOrEqualOperator(object):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1035 """The relational operator `>=` (greater than or equal)."""
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1036 __slots__ = ['lval', 'rval']
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1037 def __init__(self, lval, rval):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1038 self.lval = lval
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1039 self.rval = rval
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1040 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1041 lval = self.lval(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1042 rval = self.rval(kind, data, pos, namespaces, variables)
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1043 return float(lval) >= float(rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1044 def __repr__(self):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1045 return '%s>=%s' % (self.lval, self.rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1046
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1047 class LessThanOperator(object):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1048 """The relational operator `<` (less than)."""
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1049 __slots__ = ['lval', 'rval']
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1050 def __init__(self, lval, rval):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1051 self.lval = lval
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1052 self.rval = rval
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1053 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1054 lval = self.lval(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1055 rval = self.rval(kind, data, pos, namespaces, variables)
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1056 return float(lval) < float(rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1057 def __repr__(self):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1058 return '%s<%s' % (self.lval, self.rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1059
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1060 class LessThanOrEqualOperator(object):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1061 """The relational operator `<=` (less than or equal)."""
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1062 __slots__ = ['lval', 'rval']
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1063 def __init__(self, lval, rval):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1064 self.lval = lval
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1065 self.rval = rval
224 e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1066 def __call__(self, kind, data, pos, namespaces, variables):
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1067 lval = self.lval(kind, data, pos, namespaces, variables)
e4dad1145f84 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1068 rval = self.rval(kind, data, pos, namespaces, variables)
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1069 return float(lval) <= float(rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1070 def __repr__(self):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1071 return '%s<=%s' % (self.lval, self.rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1072
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1073 _operator_map = {'=': EqualsOperator, '!=': NotEqualsOperator,
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1074 '>': GreaterThanOperator, '>=': GreaterThanOrEqualOperator,
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1075 '<': LessThanOperator, '>=': LessThanOrEqualOperator}

Mercurial > genshi > genshi-test

annotate genshi/path.py @ 259:6f11ad260890