genshi/mirror: genshi/path.py annotate

annotate genshi/path.py @ 425:073640758a42 trunk

Try to use proper reStructuredText for docstrings throughout.

author	cmlenz
date	Thu, 22 Mar 2007 12:45:18 +0000
parents	c66370dfc41b
children	700e7b47bf2b

rev	line source
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	1 # -- coding: utf-8 --
5479aae32f5a Initial import. cmlenz parents: diff changeset	2 #
66 59eb24184e9c Switch copyright to Edgewall and URLs to markup.edgewall.org. cmlenz parents: 61 diff changeset	3 # Copyright (C) 2006 Edgewall Software
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	4 # All rights reserved.
5479aae32f5a Initial import. cmlenz parents: diff changeset	5 #
5479aae32f5a Initial import. cmlenz parents: diff changeset	6 # This software is licensed as described in the file COPYING, which
5479aae32f5a Initial import. cmlenz parents: diff changeset	7 # you should have received as part of this distribution. The terms
230 84168828b074 Renamed Markup to Genshi in repository. cmlenz parents: 228 diff changeset	8 # are also available at http://genshi.edgewall.org/wiki/License.
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	9 #
5479aae32f5a Initial import. cmlenz parents: diff changeset	10 # This software consists of voluntary contributions made by many
5479aae32f5a Initial import. cmlenz parents: diff changeset	11 # individuals. For the exact contribution history, see the revision
230 84168828b074 Renamed Markup to Genshi in repository. cmlenz parents: 228 diff changeset	12 # history and logs, available at http://genshi.edgewall.org/log/.
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	13
111 2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	14 """Basic support for evaluating XPath expressions against streams.
2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	15
230 84168828b074 Renamed Markup to Genshi in repository. cmlenz parents: 228 diff changeset	16 >>> from genshi.input import XML
111 2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	17 >>> doc = XML('''<doc>
2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	18 ... <items count="2">
2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	19 ... <item status="new">
2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	20 ... <summary>Foo</summary>
2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	21 ... </item>
2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	22 ... <item status="closed">
2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	23 ... <summary>Bar</summary>
2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	24 ... </item>
2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	25 ... </items>
2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	26 ... </doc>''')
2368c3becc52 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()')
2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	28 Bar
2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	29
2368c3becc52 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
2368c3becc52 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.
2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	32 """
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	33
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	34 from math import ceil, floor
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	35 import re
5479aae32f5a Initial import. cmlenz parents: diff changeset	36
230 84168828b074 Renamed Markup to Genshi in repository. cmlenz parents: 228 diff changeset	37 from genshi.core import Stream, Attrs, Namespace, QName
84168828b074 Renamed Markup to Genshi in repository. cmlenz parents: 228 diff changeset	38 from genshi.core import START, END, TEXT, COMMENT, PI
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	39
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	40 __all__ = ['Path', 'PathSyntaxError']
425 073640758a42 Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	41 __docformat__ = 'restructuredtext en'
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	42
5479aae32f5a Initial import. cmlenz parents: diff changeset	43
114 4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	44 class Axis(object):
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	45 """Defines constants for the various supported XPath axes."""
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	46
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	47 ATTRIBUTE = 'attribute'
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	48 CHILD = 'child'
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	49 DESCENDANT = 'descendant'
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	50 DESCENDANT_OR_SELF = 'descendant-or-self'
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	51 SELF = 'self'
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	52
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	53 def forname(cls, name):
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	54 """Return the axis constant for the given name, or `None` if no such
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	55 axis was defined.
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	56 """
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	57 return getattr(cls, name.upper().replace('-', '_'), None)
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	58 forname = classmethod(forname)
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	59
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	60
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	61 ATTRIBUTE = Axis.ATTRIBUTE
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	62 CHILD = Axis.CHILD
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	63 DESCENDANT = Axis.DESCENDANT
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	64 DESCENDANT_OR_SELF = Axis.DESCENDANT_OR_SELF
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	65 SELF = Axis.SELF
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	66
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	67
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	68 class Path(object):
26 3c1a022be04c * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	69 """Implements basic XPath support on streams.
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	70
26 3c1a022be04c * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	71 Instances of this class represent a "compiled" XPath expression, and provide
3c1a022be04c * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	72 methods for testing the path against a stream, as well as extracting a
3c1a022be04c * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	73 substream matching that path.
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	74 """
5479aae32f5a Initial import. cmlenz parents: diff changeset	75
139 8332287b5508 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	76 def __init__(self, text, filename=None, lineno=-1):
26 3c1a022be04c * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	77 """Create the path object from a string.
3c1a022be04c * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	78
425 073640758a42 Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	79 :param text: the path expression
26 3c1a022be04c * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	80 """
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	81 self.source = text
139 8332287b5508 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	82 self.paths = PathParser(text, filename, lineno).parse()
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	83
5479aae32f5a Initial import. cmlenz parents: diff changeset	84 def __repr__(self):
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	85 paths = []
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	86 for path in self.paths:
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	87 steps = []
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	88 for axis, nodetest, predicates in path:
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	89 steps.append('%s::%s' % (axis, nodetest))
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	90 for predicate in predicates:
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	91 steps[-1] += '[%s]' % predicate
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	92 paths.append('/'.join(steps))
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	93 return '<%s "%s">' % (self.__class__.__name__, '\|'.join(paths))
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	94
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	95 def select(self, stream, namespaces=None, variables=None):
26 3c1a022be04c * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	96 """Returns a substream of the given stream that matches the path.
3c1a022be04c * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	97
3c1a022be04c * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	98 If there are no matches, this method returns an empty stream.
3c1a022be04c * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	99
230 84168828b074 Renamed Markup to Genshi in repository. cmlenz parents: 228 diff changeset	100 >>> from genshi.input import XML
33 1fdb7054fb42 Add doctests for path module. cmlenz parents: 27 diff changeset	101 >>> xml = XML('<root><elem><child>Text</child></elem></root>')
61 448792ab1303 Use a different namespace than Kid uses. cmlenz parents: 38 diff changeset	102
216 636fe6766b4d 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	103 >>> print Path('.//child').select(xml)
33 1fdb7054fb42 Add doctests for path module. cmlenz parents: 27 diff changeset	104 <child>Text</child>
1fdb7054fb42 Add doctests for path module. cmlenz parents: 27 diff changeset	105
216 636fe6766b4d 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	106 >>> print Path('.//child/text()').select(xml)
33 1fdb7054fb42 Add doctests for path module. cmlenz parents: 27 diff changeset	107 Text
1fdb7054fb42 Add doctests for path module. cmlenz parents: 27 diff changeset	108
425 073640758a42 Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	109 :param stream: the stream to select from
073640758a42 Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	110 :param namespaces: (optional) a mapping of namespace prefixes to URIs
073640758a42 Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	111 :param variables: (optional) a mapping of variable names to values
073640758a42 Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	112 :return: the substream matching the path, or an empty stream
26 3c1a022be04c * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	113 """
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	114 if namespaces is None:
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	115 namespaces = {}
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	116 if variables is None:
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	117 variables = {}
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	118 stream = iter(stream)
26 3c1a022be04c * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	119 def _generate():
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	120 test = self.test()
305 60111a041e7c Various performance-oriented tweaks. cmlenz parents: 282 diff changeset	121 for event in stream:
60111a041e7c Various performance-oriented tweaks. cmlenz parents: 282 diff changeset	122 result = test(event, namespaces, variables)
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	123 if result is True:
305 60111a041e7c Various performance-oriented tweaks. cmlenz parents: 282 diff changeset	124 yield event
330 3e749eaa3100 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	125 if event[0] is START:
3e749eaa3100 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	126 depth = 1
3e749eaa3100 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	127 while depth > 0:
3e749eaa3100 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	128 subevent = stream.next()
3e749eaa3100 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	129 if subevent[0] is START:
3e749eaa3100 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	130 depth += 1
3e749eaa3100 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	131 elif subevent[0] is END:
3e749eaa3100 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	132 depth -= 1
3e749eaa3100 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	133 yield subevent
3e749eaa3100 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	134 test(subevent, namespaces, variables,
3e749eaa3100 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	135 updateonly=True)
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	136 elif result:
5479aae32f5a Initial import. cmlenz parents: diff changeset	137 yield result
26 3c1a022be04c * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	138 return Stream(_generate())
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	139
38 ee669cb9cccc 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	140 def test(self, ignore_context=False):
26 3c1a022be04c * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	141 """Returns a function that can be used to track whether the path matches
3c1a022be04c * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	142 a specific stream event.
3c1a022be04c * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	143
425 073640758a42 Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	144 The function returned expects the positional arguments ``event``,
073640758a42 Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	145 ``namespaces`` and ``variables``. The first is a stream event, while the
305 60111a041e7c Various performance-oriented tweaks. cmlenz parents: 282 diff changeset	146 latter two are a mapping of namespace prefixes to URIs, and a mapping
306 095a754f95a8 Minor optimization for XPath evaluation. cmlenz parents: 305 diff changeset	147 of variable names to values, respectively. In addition, the function
425 073640758a42 Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	148 accepts an ``updateonly`` keyword argument that default to ``False``. If
073640758a42 Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	149 it is set to ``True``, the function only updates its internal state,
306 095a754f95a8 Minor optimization for XPath evaluation. cmlenz parents: 305 diff changeset	150 but does not perform any tests or return a result.
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	151
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	152 If the path matches the event, the function returns the match (for
425 073640758a42 Try to use proper reStructuredText for docstrings throughout. cmlenz parents: 386 diff changeset	153 example, a `START` or `TEXT` event.) Otherwise, it returns ``None``.
33 1fdb7054fb42 Add doctests for path module. cmlenz parents: 27 diff changeset	154
230 84168828b074 Renamed Markup to Genshi in repository. cmlenz parents: 228 diff changeset	155 >>> from genshi.input import XML
33 1fdb7054fb42 Add doctests for path module. cmlenz parents: 27 diff changeset	156 >>> xml = XML('<root><elem><child id="1"/></elem><child id="2"/></root>')
1fdb7054fb42 Add doctests for path module. cmlenz parents: 27 diff changeset	157 >>> test = Path('child').test()
305 60111a041e7c Various performance-oriented tweaks. cmlenz parents: 282 diff changeset	158 >>> for event in xml:
60111a041e7c Various performance-oriented tweaks. cmlenz parents: 282 diff changeset	159 ... if test(event, {}, {}):
386 c66370dfc41b Unit test fixes for Python 2.3. cmlenz parents: 384 diff changeset	160 ... print event[0], repr(event[1])
c66370dfc41b Unit test fixes for Python 2.3. cmlenz parents: 384 diff changeset	161 START (QName(u'child'), Attrs([(QName(u'id'), u'2')]))
26 3c1a022be04c * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	162 """
333 e5ba8c5a30fe Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	163 paths = [(p, len(p), [0], [], [0] * len(p)) for p in [
e5ba8c5a30fe Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	164 (ignore_context and [_DOTSLASHSLASH] or []) + p for p in self.paths
e5ba8c5a30fe Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	165 ]]
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	166
306 095a754f95a8 Minor optimization for XPath evaluation. cmlenz parents: 305 diff changeset	167 def _test(event, namespaces, variables, updateonly=False):
330 3e749eaa3100 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	168 kind, data, pos = event[:3]
259 fe8dbe9066c1 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	169 retval = None
228 a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	170 for steps, size, cursors, cutoff, counter in paths:
216 636fe6766b4d 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	171 # Manage the stack that tells us "where we are" in the stream
211 e5151983df0d 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	172 if kind is END:
228 a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	173 if cursors:
a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	174 cursors.pop()
211 e5151983df0d 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	175 continue
223 9c199fcb9f31 Fix typo introduced in [272]. cmlenz parents: 217 diff changeset	176 elif kind is START:
228 a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	177 cursors.append(cursors and cursors[-1] or 0)
259 fe8dbe9066c1 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	178
306 095a754f95a8 Minor optimization for XPath evaluation. cmlenz parents: 305 diff changeset	179 if updateonly or retval or not cursors:
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	180 continue
228 a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	181 cursor = cursors[-1]
a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	182 depth = len(cursors)
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	183
228 a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	184 if cutoff and depth + int(kind is not START) > cutoff[0]:
216 636fe6766b4d 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	185 continue
636fe6766b4d 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
636fe6766b4d 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 ctxtnode = not ignore_context and kind is START \
228 a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	188 and depth == 2
259 fe8dbe9066c1 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	189 matched = None
111 2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	190 while 1:
216 636fe6766b4d 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	191 # Fetch the next location step
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	192 axis, nodetest, predicates = steps[cursor]
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	193
216 636fe6766b4d 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 # If this is the start event for the context node, and the
636fe6766b4d 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 # axis of the location step doesn't include the current
636fe6766b4d 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	196 # element, skip the test
636fe6766b4d 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 if ctxtnode and (axis is CHILD or axis is DESCENDANT):
111 2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	198 break
2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	199
216 636fe6766b4d 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 # Is this the last step of the location path?
636fe6766b4d 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 last_step = cursor + 1 == size
636fe6766b4d 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
636fe6766b4d 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 # Perform the actual node test
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	204 matched = nodetest(kind, data, pos, namespaces, variables)
216 636fe6766b4d Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	205
636fe6766b4d 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	206 # The node test matched
636fe6766b4d 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	207 if matched:
636fe6766b4d 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	208
636fe6766b4d Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	209 # Check all the predicates for this step
636fe6766b4d 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	210 if predicates:
636fe6766b4d 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 for predicate in predicates:
228 a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	212 pretval = predicate(kind, data, pos, namespaces,
a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	213 variables)
a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	214 if type(pretval) is float:
a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	215 counter[cursor] += 1
a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	216 if counter[cursor] != int(pretval):
a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	217 pretval = False
a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	218 if not pretval:
216 636fe6766b4d 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 matched = None
636fe6766b4d 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 break
636fe6766b4d 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
636fe6766b4d 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 # Both the node test and the predicates matched
636fe6766b4d Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	223 if matched:
636fe6766b4d 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 if last_step:
217 f150cff4da18 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	225 if not ctxtnode or kind is not START \
f150cff4da18 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	226 or axis is ATTRIBUTE or axis is SELF:
216 636fe6766b4d Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	227 retval = matched
636fe6766b4d 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 elif not ctxtnode or axis is SELF \
636fe6766b4d 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 or axis is DESCENDANT_OR_SELF:
636fe6766b4d 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 cursor += 1
228 a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	231 cursors[-1] = cursor
216 636fe6766b4d 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	232 cutoff[:] = []
228 a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	233
333 e5ba8c5a30fe Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	234 if kind is START:
e5ba8c5a30fe Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	235 if last_step and not (axis is DESCENDANT or
e5ba8c5a30fe Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	236 axis is DESCENDANT_OR_SELF):
228 a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	237 cutoff[:] = [depth]
216 636fe6766b4d 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
333 e5ba8c5a30fe Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	239 elif steps[cursor][0] is ATTRIBUTE:
216 636fe6766b4d 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 # If the axis of the next location step is the
363 37e4b4bb0b53 Parse template includes at parse time to avoid some runtime overhead. cmlenz parents: 333 diff changeset	241 # attribute axis, we need to move on to processing
37e4b4bb0b53 Parse template includes at parse time to avoid some runtime overhead. cmlenz parents: 333 diff changeset	242 # that step without waiting for the next markup
37e4b4bb0b53 Parse template includes at parse time to avoid some runtime overhead. cmlenz parents: 333 diff changeset	243 # event
216 636fe6766b4d 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 continue
636fe6766b4d Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	245
636fe6766b4d Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	246 # We're done with this step if it's the last step or the
636fe6766b4d 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 # axis isn't "self"
384 5b6e4335ee21 Fix for infinite loop in XPath test. Closes #82. cmlenz parents: 364 diff changeset	248 if not matched or last_step or not (
5b6e4335ee21 Fix for infinite loop in XPath test. Closes #82. cmlenz parents: 364 diff changeset	249 axis is SELF or axis is DESCENDANT_OR_SELF):
216 636fe6766b4d 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 break
636fe6766b4d Many fixes to XPath evaluation. Among other things, this should get rid of the bug that attributes were getting ?pulled up? by `py:match` directives using `py:attrs="select('@')"` (see #50). cmlenz* parents: 215 diff changeset	251
333 e5ba8c5a30fe Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	252 if (retval or not matched) and kind is START and \
e5ba8c5a30fe Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	253 not (axis is DESCENDANT or axis is DESCENDANT_OR_SELF):
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	254 # If this step is not a closure, it cannot be matched until
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	255 # the current element is closed... so we need to move the
114 4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	256 # cursor back to the previous closure and retest that
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	257 # against the current element
333 e5ba8c5a30fe Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	258 backsteps = [(i, k, d, p) for i, (k, d, p)
e5ba8c5a30fe Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	259 in enumerate(steps[:cursor])
215 94120e6b0ce4 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	260 if k is DESCENDANT or k is DESCENDANT_OR_SELF]
111 2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	261 backsteps.reverse()
333 e5ba8c5a30fe Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	262 for cursor, axis, nodetest, predicates in backsteps:
e5ba8c5a30fe Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	263 if nodetest(kind, data, pos, namespaces, variables):
e5ba8c5a30fe Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	264 cutoff[:] = []
e5ba8c5a30fe Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	265 break
228 a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	266 cursors[-1] = cursor
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	267
259 fe8dbe9066c1 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	268 return retval
1 5479aae32f5a Initial import. cmlenz parents: diff changeset	269
5479aae32f5a Initial import. cmlenz parents: diff changeset	270 return _test
5479aae32f5a Initial import. cmlenz parents: diff changeset	271
5479aae32f5a Initial import. cmlenz parents: diff changeset	272
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	273 class PathSyntaxError(Exception):
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	274 """Exception raised when an XPath expression is syntactically incorrect."""
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	275
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	276 def __init__(self, message, filename=None, lineno=-1, offset=-1):
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	277 if filename:
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	278 message = '%s (%s, line %d)' % (message, filename, lineno)
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	279 Exception.__init__(self, message)
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	280 self.filename = filename
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	281 self.lineno = lineno
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	282 self.offset = offset
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	283
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	284
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	285 class PathParser(object):
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	286 """Tokenizes and parses an XPath expression."""
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	287
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	288 _QUOTES = (("'", "'"), ('"', '"'))
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	289 _TOKENS = ('::', ':', '..', '.', '//', '/', '[', ']', '()', '(', ')', '@',
179 13909179e5e1 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	290 '=', '!=', '!', '\|', ',', '>=', '>', '<=', '<', '$')
163 9c023c395e44 Support for XPath number literals including decimal places. cmlenz parents: 162 diff changeset	291 _tokenize = re.compile('("[^"]")\|(\'[^\']\')\|((?:\d+)?\.\d+)\|(%s)\|([^%s\s]+)\|\s+' % (
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	292 '\|'.join([re.escape(t) for t in _TOKENS]),
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	293 ''.join([re.escape(t[0]) for t in _TOKENS]))).findall
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	294
139 8332287b5508 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	295 def __init__(self, text, filename=None, lineno=-1):
8332287b5508 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	296 self.filename = filename
8332287b5508 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	297 self.lineno = lineno
163 9c023c395e44 Support for XPath number literals including decimal places. cmlenz parents: 162 diff changeset	298 self.tokens = filter(None, [dqstr or sqstr or number or token or name
9c023c395e44 Support for XPath number literals including decimal places. cmlenz parents: 162 diff changeset	299 for dqstr, sqstr, number, token, name in
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	300 self._tokenize(text)])
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	301 self.pos = 0
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	302
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	303 # Tokenizer
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	304
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	305 at_end = property(lambda self: self.pos == len(self.tokens) - 1)
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	306 cur_token = property(lambda self: self.tokens[self.pos])
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	307
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	308 def next_token(self):
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	309 self.pos += 1
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	310 return self.tokens[self.pos]
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	311
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	312 def peek_token(self):
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	313 if not self.at_end:
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	314 return self.tokens[self.pos + 1]
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	315 return None
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	316
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	317 # Recursive descent parser
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	318
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	319 def parse(self):
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	320 """Parses the XPath expression and returns a list of location path
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	321 tests.
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	322
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	323 For union expressions (such as `*\|text()`), this function returns one
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	324 test for each operand in the union. For patch expressions that don't
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	325 use the union operator, the function always returns a list of size 1.
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	326
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	327 Each path test in turn is a sequence of tests that correspond to the
111 2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	328 location steps, each tuples of the form `(axis, testfunc, predicates)`
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	329 """
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	330 paths = [self._location_path()]
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	331 while self.cur_token == '\|':
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	332 self.next_token()
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	333 paths.append(self._location_path())
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	334 if not self.at_end:
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	335 raise PathSyntaxError('Unexpected token %r after end of expression'
139 8332287b5508 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	336 % self.cur_token, self.filename, self.lineno)
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	337 return paths
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	338
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	339 def _location_path(self):
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	340 steps = []
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	341 while True:
215 94120e6b0ce4 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	342 if self.cur_token.startswith('/'):
94120e6b0ce4 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	343 if self.cur_token == '//':
94120e6b0ce4 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	344 steps.append((DESCENDANT_OR_SELF, NodeTest(), []))
94120e6b0ce4 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	345 elif not steps:
94120e6b0ce4 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	346 raise PathSyntaxError('Absolute location paths not '
94120e6b0ce4 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	347 'supported', self.filename,
94120e6b0ce4 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	348 self.lineno)
111 2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	349 self.next_token()
2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	350
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	351 axis, nodetest, predicates = self._location_step()
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	352 if not axis:
145 47bbd9d2a5af * Fix error in expression evaluation when the expression evaluates to an iterable that does not produce event tuples. cmlenz parents: 139 diff changeset	353 axis = CHILD
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	354 steps.append((axis, nodetest, predicates))
111 2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	355
2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	356 if self.at_end or not self.cur_token.startswith('/'):
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	357 break
111 2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	358
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	359 return steps
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	360
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	361 def _location_step(self):
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	362 if self.cur_token == '@':
114 4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	363 axis = ATTRIBUTE
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	364 self.next_token()
111 2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	365 elif self.cur_token == '.':
114 4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	366 axis = SELF
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	367 elif self.cur_token == '..':
139 8332287b5508 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	368 raise PathSyntaxError('Unsupported axis "parent"', self.filename,
8332287b5508 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	369 self.lineno)
111 2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	370 elif self.peek_token() == '::':
114 4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	371 axis = Axis.forname(self.cur_token)
4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	372 if axis is None:
139 8332287b5508 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	373 raise PathSyntaxError('Unsupport axis "%s"' % axis,
8332287b5508 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	374 self.filename, self.lineno)
111 2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	375 self.next_token()
2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	376 self.next_token()
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	377 else:
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	378 axis = None
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	379 nodetest = self._node_test(axis or CHILD)
111 2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	380 predicates = []
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	381 while self.cur_token == '[':
111 2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	382 predicates.append(self._predicate())
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	383 return axis, nodetest, predicates
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	384
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	385 def _node_test(self, axis=None):
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	386 test = prefix = None
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	387 next_token = self.peek_token()
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	388 if next_token in ('(', '()'): # Node type test
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	389 test = self._node_type()
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	390
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	391 elif next_token == ':': # Namespace prefix
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	392 prefix = self.cur_token
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	393 self.next_token()
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	394 localname = self.next_token()
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	395 if localname == '*':
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	396 test = QualifiedPrincipalTypeTest(axis, prefix)
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	397 else:
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	398 test = QualifiedNameTest(axis, prefix, localname)
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	399
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	400 else: # Name test
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	401 if self.cur_token == '*':
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	402 test = PrincipalTypeTest(axis)
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	403 elif self.cur_token == '.':
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	404 test = NodeTest()
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	405 else:
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	406 test = LocalNameTest(axis, self.cur_token)
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	407
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	408 if not self.at_end:
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	409 self.next_token()
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	410 return test
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	411
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	412 def _node_type(self):
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	413 name = self.cur_token
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	414 self.next_token()
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	415
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	416 args = []
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	417 if self.cur_token != '()':
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	418 # The processing-instruction() function optionally accepts the
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	419 # name of the PI as argument, which must be a literal string
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	420 self.next_token() # (
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	421 if self.cur_token != ')':
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	422 string = self.cur_token
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	423 if (string[0], string[-1]) in self._QUOTES:
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	424 string = string[1:-1]
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	425 args.append(string)
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	426
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	427 cls = _nodetest_map.get(name)
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	428 if not cls:
139 8332287b5508 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	429 raise PathSyntaxError('%s() not allowed here' % name, self.filename,
8332287b5508 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	430 self.lineno)
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	431 return cls(*args)
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	432
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	433 def _predicate(self):
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	434 assert self.cur_token == '['
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	435 self.next_token()
111 2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	436 expr = self._or_expr()
121 062e51ad7b19 Added support for the XPath functions `name()`, `namespace-uri()`, `local-name()`, and `not()`. cmlenz parents: 114 diff changeset	437 if self.cur_token != ']':
062e51ad7b19 Added support for the XPath functions `name()`, `namespace-uri()`, `local-name()`, and `not()`. cmlenz parents: 114 diff changeset	438 raise PathSyntaxError('Expected "]" to close predicate, '
139 8332287b5508 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	439 'but found "%s"' % self.cur_token,
8332287b5508 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	440 self.filename, self.lineno)
111 2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	441 if not self.at_end:
2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	442 self.next_token()
2368c3becc52 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	443 return expr
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	444
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	445 def _or_expr(self):
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	446 expr = self._and_expr()
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	447 while self.cur_token == 'or':
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	448 self.next_token()
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	449 expr = OrOperator(expr, self._and_expr())
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	450 return expr
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	451
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	452 def _and_expr(self):
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	453 expr = self._equality_expr()
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	454 while self.cur_token == 'and':
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	455 self.next_token()
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	456 expr = AndOperator(expr, self._equality_expr())
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	457 return expr
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	458
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	459 def _equality_expr(self):
162 456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	460 expr = self._relational_expr()
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	461 while self.cur_token in ('=', '!='):
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	462 op = _operator_map[self.cur_token]
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	463 self.next_token()
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	464 expr = op(expr, self._relational_expr())
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	465 return expr
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	466
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	467 def _relational_expr(self):
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	468 expr = self._primary_expr()
162 456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	469 while self.cur_token in ('>', '>=', '<', '>='):
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	470 op = _operator_map[self.cur_token]
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	471 self.next_token()
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	472 expr = op(expr, self._primary_expr())
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	473 return expr
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	474
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	475 def _primary_expr(self):
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	476 token = self.cur_token
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	477 if len(token) > 1 and (token[0], token[-1]) in self._QUOTES:
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	478 self.next_token()
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	479 return StringLiteral(token[1:-1])
163 9c023c395e44 Support for XPath number literals including decimal places. cmlenz parents: 162 diff changeset	480 elif token[0].isdigit() or token[0] == '.':
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	481 self.next_token()
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	482 return NumberLiteral(float(token))
179 13909179e5e1 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	483 elif token == '$':
13909179e5e1 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	484 token = self.next_token()
13909179e5e1 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	485 self.next_token()
13909179e5e1 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	486 return VariableReference(token)
121 062e51ad7b19 Added support for the XPath functions `name()`, `namespace-uri()`, `local-name()`, and `not()`. cmlenz parents: 114 diff changeset	487 elif not self.at_end and self.peek_token().startswith('('):
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	488 return self._function_call()
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	489 else:
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	490 axis = None
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	491 if token == '@':
114 4c4e81d12649 Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	492 axis = ATTRIBUTE
106 f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	493 self.next_token()
f9473bdc93b2 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	494 return self._node_test(axis)
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	495
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	496 def _function_call(self):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	497 name = self.cur_token
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	498 if self.next_token() == '()':
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	499 args = []
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	500 else:
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	501 assert self.cur_token == '('
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	502 self.next_token()
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	503 args = [self._or_expr()]
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	504 while self.cur_token == ',':
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	505 self.next_token()
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	506 args.append(self._or_expr())
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	507 if not self.cur_token == ')':
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	508 raise PathSyntaxError('Expected ")" to close function argument '
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	509 'list, but found "%s"' % self.cur_token,
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	510 self.filename, self.lineno)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	511 self.next_token()
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	512 cls = _function_map.get(name)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	513 if not cls:
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	514 raise PathSyntaxError('Unsupported function "%s"' % name,
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	515 self.filename, self.lineno)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	516 return cls(*args)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	517
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	518
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	519 # Node tests
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	520
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	521 class PrincipalTypeTest(object):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	522 """Node test that matches any event with the given principal type."""
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	523 __slots__ = ['principal_type']
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	524 def __init__(self, principal_type):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	525 self.principal_type = principal_type
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	526 def __call__(self, kind, data, pos, namespaces, variables):
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	527 if kind is START:
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	528 if self.principal_type is ATTRIBUTE:
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	529 return data[1] or None
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	530 else:
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	531 return True
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	532 def __repr__(self):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	533 return '*'
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	534
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	535 class QualifiedPrincipalTypeTest(object):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	536 """Node test that matches any event with the given principal type in a
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	537 specific namespace."""
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	538 __slots__ = ['principal_type', 'prefix']
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	539 def __init__(self, principal_type, prefix):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	540 self.principal_type = principal_type
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	541 self.prefix = prefix
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	542 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	543 namespace = Namespace(namespaces.get(self.prefix))
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	544 if kind is START:
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	545 if self.principal_type is ATTRIBUTE and data[1]:
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	546 return Attrs([(name, value) for name, value in data[1]
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	547 if name in namespace]) or None
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	548 else:
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	549 return data[0] in namespace
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	550 def __repr__(self):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	551 return '%s:*' % self.prefix
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	552
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	553 class LocalNameTest(object):
364 7dabedbb53fb Fix for #77: match templates were matching their own output. cmlenz parents: 363 diff changeset	554 """Node test that matches any event with the given principal type and
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	555 local name.
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	556 """
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	557 __slots__ = ['principal_type', 'name']
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	558 def __init__(self, principal_type, name):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	559 self.principal_type = principal_type
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	560 self.name = name
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	561 def __call__(self, kind, data, pos, namespaces, variables):
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	562 if kind is START:
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	563 if self.principal_type is ATTRIBUTE and self.name in data[1]:
234 39c424b80edd * Minor simplification of XPath engine. cmlenz parents: 230 diff changeset	564 return data[1].get(self.name)
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	565 else:
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	566 return data[0].localname == self.name
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	567 def __repr__(self):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	568 return self.name
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	569
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	570 class QualifiedNameTest(object):
364 7dabedbb53fb Fix for #77: match templates were matching their own output. cmlenz parents: 363 diff changeset	571 """Node test that matches any event with the given principal type and
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	572 qualified name.
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	573 """
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	574 __slots__ = ['principal_type', 'prefix', 'name']
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	575 def __init__(self, principal_type, prefix, name):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	576 self.principal_type = principal_type
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	577 self.prefix = prefix
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	578 self.name = name
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	579 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	580 qname = QName('%s}%s' % (namespaces.get(self.prefix), self.name))
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	581 if kind is START:
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	582 if self.principal_type is ATTRIBUTE and qname in data[1]:
234 39c424b80edd * Minor simplification of XPath engine. cmlenz parents: 230 diff changeset	583 return data[1].get(qname)
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	584 else:
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	585 return data[0] == qname
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	586 def __repr__(self):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	587 return '%s:%s' % (self.prefix, self.name)
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	588
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	589 class CommentNodeTest(object):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	590 """Node test that matches any comment events."""
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	591 __slots__ = []
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	592 def __call__(self, kind, data, pos, namespaces, variables):
330 3e749eaa3100 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	593 return kind is COMMENT
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	594 def __repr__(self):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	595 return 'comment()'
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	596
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	597 class NodeTest(object):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	598 """Node test that matches any node."""
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	599 __slots__ = []
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	600 def __call__(self, kind, data, pos, namespaces, variables):
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	601 if kind is START:
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	602 return True
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	603 return kind, data, pos
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	604 def __repr__(self):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	605 return 'node()'
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	606
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	607 class ProcessingInstructionNodeTest(object):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	608 """Node test that matches any processing instruction event."""
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	609 __slots__ = ['target']
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	610 def __init__(self, target=None):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	611 self.target = target
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	612 def __call__(self, kind, data, pos, namespaces, variables):
330 3e749eaa3100 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	613 return kind is PI and (not self.target or data[0] == self.target)
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	614 def __repr__(self):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	615 arg = ''
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	616 if self.target:
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	617 arg = '"' + self.target + '"'
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	618 return 'processing-instruction(%s)' % arg
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	619
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	620 class TextNodeTest(object):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	621 """Node test that matches any text event."""
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	622 __slots__ = []
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	623 def __call__(self, kind, data, pos, namespaces, variables):
330 3e749eaa3100 XPath tests should never return event tuples, just values or booleans. cmlenz parents: 326 diff changeset	624 return kind is TEXT
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	625 def __repr__(self):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	626 return 'text()'
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	627
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	628 _nodetest_map = {'comment': CommentNodeTest, 'node': NodeTest,
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	629 'processing-instruction': ProcessingInstructionNodeTest,
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	630 'text': TextNodeTest}
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	631
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	632 # Functions
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	633
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	634 class Function(object):
9a5aedda1099 * 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."""
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	636
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	637 class BooleanFunction(Function):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	638 """The `boolean` function, which converts its argument to a boolean
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	639 value.
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	640 """
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	641 __slots__ = ['expr']
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	642 def __init__(self, expr):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	643 self.expr = expr
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	644 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	645 val = self.expr(kind, data, pos, namespaces, variables)
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	646 return bool(val)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	647 def __repr__(self):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	648 return 'boolean(%r)' % self.expr
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	649
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	650 class CeilingFunction(Function):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	651 """The `ceiling` function, which returns the nearest lower integer number
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	652 for the given number.
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	653 """
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	654 __slots__ = ['number']
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	655 def __init__(self, number):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	656 self.number = number
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	657 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	658 number = self.number(kind, data, pos, namespaces, variables)
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	659 return ceil(float(number))
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	660 def __repr__(self):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	661 return 'ceiling(%r)' % self.number
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	662
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	663 class ConcatFunction(Function):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	664 """The `concat` function, which concatenates (joins) the variable number of
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	665 strings it gets as arguments.
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	666 """
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	667 __slots__ = ['exprs']
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	668 def __init__(self, *exprs):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	669 self.exprs = exprs
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	670 def __call__(self, kind, data, pos, namespaces, variables):
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	671 strings = []
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	672 for item in [expr(kind, data, pos, namespaces, variables)
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	673 for expr in self.exprs]:
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	674 strings.append(item)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	675 return u''.join(strings)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	676 def __repr__(self):
169 dc6676d3b697 Fix syntax error in `path` module. cmlenz parents: 164 diff changeset	677 return 'concat(%s)' % ', '.join([repr(expr) for expr in self.exprs])
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	678
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	679 class ContainsFunction(Function):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	680 """The `contains` function, which returns whether a string contains a given
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	681 substring.
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	682 """
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	683 __slots__ = ['string1', 'string2']
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	684 def __init__(self, string1, string2):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	685 self.string1 = string1
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	686 self.string2 = string2
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	687 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	688 string1 = self.string1(kind, data, pos, namespaces, variables)
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	689 string2 = self.string2(kind, data, pos, namespaces, variables)
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	690 return string2 in string1
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	691 def __repr__(self):
9a5aedda1099 * 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)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	693
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	694 class FalseFunction(Function):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	695 """The `false` function, which always returns the boolean `false` value."""
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	696 __slots__ = []
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	697 def __call__(self, kind, data, pos, namespaces, variables):
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	698 return False
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	699 def __repr__(self):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	700 return 'false()'
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	701
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	702 class FloorFunction(Function):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	703 """The `ceiling` function, which returns the nearest higher integer number
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	704 for the given number.
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	705 """
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	706 __slots__ = ['number']
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	707 def __init__(self, number):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	708 self.number = number
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	709 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	710 number = self.number(kind, data, pos, namespaces, variables)
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	711 return floor(float(number))
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	712 def __repr__(self):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	713 return 'floor(%r)' % self.number
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	714
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	715 class LocalNameFunction(Function):
161 7b1f07496bf7 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
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	717 element.
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	718 """
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	719 __slots__ = []
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	720 def __call__(self, kind, data, pos, namespaces, variables):
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	721 if kind is START:
234 39c424b80edd * Minor simplification of XPath engine. cmlenz parents: 230 diff changeset	722 return data[0].localname
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	723 def __repr__(self):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	724 return 'local-name()'
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	725
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	726 class NameFunction(Function):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	727 """The `name` function, which returns the qualified name of the current
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	728 element.
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	729 """
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	730 __slots__ = []
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	731 def __call__(self, kind, data, pos, namespaces, variables):
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	732 if kind is START:
234 39c424b80edd * Minor simplification of XPath engine. cmlenz parents: 230 diff changeset	733 return data[0]
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	734 def __repr__(self):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	735 return 'name()'
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	736
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	737 class NamespaceUriFunction(Function):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	738 """The `namespace-uri` function, which returns the namespace URI of the
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	739 current element.
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	740 """
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	741 __slots__ = []
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	742 def __call__(self, kind, data, pos, namespaces, variables):
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	743 if kind is START:
234 39c424b80edd * Minor simplification of XPath engine. cmlenz parents: 230 diff changeset	744 return data[0].namespace
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	745 def __repr__(self):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	746 return 'namespace-uri()'
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	747
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	748 class NotFunction(Function):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	749 """The `not` function, which returns the negated boolean value of its
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	750 argument.
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	751 """
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	752 __slots__ = ['expr']
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	753 def __init__(self, expr):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	754 self.expr = expr
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	755 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	756 return not self.expr(kind, data, pos, namespaces, variables)
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	757 def __repr__(self):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	758 return 'not(%s)' % self.expr
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	759
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	760 class NormalizeSpaceFunction(Function):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	761 """The `normalize-space` function, which removes leading and trailing
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	762 whitespace in the given string, and replaces multiple adjacent whitespace
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	763 characters inside the string with a single space.
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	764 """
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	765 __slots__ = ['expr']
9a5aedda1099 * 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
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	767 def __init__(self, expr):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	768 self.expr = expr
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	769 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	770 string = self.expr(kind, data, pos, namespaces, variables)
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	771 return self._normalize(' ', string.strip())
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	772 def __repr__(self):
9a5aedda1099 * 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)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	774
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	775 class NumberFunction(Function):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	776 """The `number` function that converts its argument to a number."""
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	777 __slots__ = ['expr']
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	778 def __init__(self, expr):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	779 self.expr = expr
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	780 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	781 val = self.expr(kind, data, pos, namespaces, variables)
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	782 return float(val)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	783 def __repr__(self):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	784 return 'number(%r)' % self.expr
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	785
162 456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	786 class RoundFunction(Function):
456039594db9 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
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	788 given number.
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	789 """
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	790 __slots__ = ['number']
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	791 def __init__(self, number):
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	792 self.number = number
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	793 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	794 number = self.number(kind, data, pos, namespaces, variables)
162 456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	795 return round(float(number))
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	796 def __repr__(self):
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	797 return 'round(%r)' % self.number
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	798
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	799 class StartsWithFunction(Function):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	800 """The `starts-with` function that returns whether one string starts with
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	801 a given substring.
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	802 """
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	803 __slots__ = ['string1', 'string2']
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	804 def __init__(self, string1, string2):
282 24b3cbbc1b1b Fix `starts-with()` XPath function so that it actually compares the two strings. Closes #61. cmlenz parents: 259 diff changeset	805 self.string1 = string1
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	806 self.string2 = string2
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	807 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	808 string1 = self.string1(kind, data, pos, namespaces, variables)
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	809 string2 = self.string2(kind, data, pos, namespaces, variables)
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	810 return string1.startswith(string2)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	811 def __repr__(self):
9a5aedda1099 * 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)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	813
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	814 class StringLengthFunction(Function):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	815 """The `string-length` function that returns the length of the given
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	816 string.
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	817 """
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	818 __slots__ = ['expr']
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	819 def __init__(self, expr):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	820 self.expr = expr
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	821 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	822 string = self.expr(kind, data, pos, namespaces, variables)
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	823 return len(string)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	824 def __repr__(self):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	825 return 'string-length(%r)' % self.expr
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	826
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	827 class SubstringFunction(Function):
161 7b1f07496bf7 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
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	829 at the given offset, and optionally limited to the given length.
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	830 """
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	831 __slots__ = ['string', 'start', 'length']
9a5aedda1099 * 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):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	833 self.string = string
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	834 self.start = start
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	835 self.length = length
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	836 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	837 string = self.string(kind, data, pos, namespaces, variables)
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	838 start = self.start(kind, data, pos, namespaces, variables)
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	839 length = 0
9a5aedda1099 * 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 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	841 length = self.length(kind, data, pos, namespaces, variables)
155 9a5aedda1099 * 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)]
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	843 def __repr__(self):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	844 if self.length is not None:
9a5aedda1099 * 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,
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	846 self.length)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	847 else:
9a5aedda1099 * 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)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	849
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	850 class SubstringAfterFunction(Function):
161 7b1f07496bf7 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
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	852 is found after the given substring.
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	853 """
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	854 __slots__ = ['string1', 'string2']
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	855 def __init__(self, string1, string2):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	856 self.string1 = string1
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	857 self.string2 = string2
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	858 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	859 string1 = self.string1(kind, data, pos, namespaces, variables)
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	860 string2 = self.string2(kind, data, pos, namespaces, variables)
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	861 index = string1.find(string2)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	862 if index >= 0:
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	863 return string1[index + len(string2):]
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	864 return u''
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	865 def __repr__(self):
9a5aedda1099 * 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)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	867
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	868 class SubstringBeforeFunction(Function):
161 7b1f07496bf7 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
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	870 is found before the given substring.
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	871 """
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	872 __slots__ = ['string1', 'string2']
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	873 def __init__(self, string1, string2):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	874 self.string1 = string1
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	875 self.string2 = string2
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	876 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	877 string1 = self.string1(kind, data, pos, namespaces, variables)
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	878 string2 = self.string2(kind, data, pos, namespaces, variables)
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	879 index = string1.find(string2)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	880 if index >= 0:
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	881 return string1[:index]
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	882 return u''
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	883 def __repr__(self):
9a5aedda1099 * 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)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	885
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	886 class TranslateFunction(Function):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	887 """The `translate` function that translates a set of characters in a
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	888 string to target set of characters.
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	889 """
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	890 __slots__ = ['string', 'fromchars', 'tochars']
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	891 def __init__(self, string, fromchars, tochars):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	892 self.string = string
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	893 self.fromchars = fromchars
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	894 self.tochars = tochars
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	895 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	896 string = self.string(kind, data, pos, namespaces, variables)
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	897 fromchars = self.fromchars(kind, data, pos, namespaces, variables)
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	898 tochars = self.tochars(kind, data, pos, namespaces, variables)
155 9a5aedda1099 * 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],
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	900 [ord(c) for c in tochars]))
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	901 return string.translate(table)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	902 def __repr__(self):
9a5aedda1099 * 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,
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	904 self.tochars)
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	905
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	906 class TrueFunction(Function):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	907 """The `true` function, which always returns the boolean `true` value."""
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	908 __slots__ = []
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	909 def __call__(self, kind, data, pos, namespaces, variables):
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	910 return True
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	911 def __repr__(self):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	912 return 'true()'
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	913
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	914 _function_map = {'boolean': BooleanFunction, 'ceiling': CeilingFunction,
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	915 'concat': ConcatFunction, 'contains': ContainsFunction,
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	916 'false': FalseFunction, 'floor': FloorFunction,
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	917 'local-name': LocalNameFunction, 'name': NameFunction,
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	918 'namespace-uri': NamespaceUriFunction,
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	919 'normalize-space': NormalizeSpaceFunction, 'not': NotFunction,
162 456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	920 'number': NumberFunction, 'round': RoundFunction,
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	921 'starts-with': StartsWithFunction,
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	922 'string-length': StringLengthFunction,
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	923 'substring': SubstringFunction,
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	924 'substring-after': SubstringAfterFunction,
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	925 'substring-before': SubstringBeforeFunction,
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	926 'translate': TranslateFunction, 'true': TrueFunction}
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	927
179 13909179e5e1 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	928 # Literals & Variables
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	929
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	930 class Literal(object):
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	931 """Abstract base class for literal nodes."""
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	932
9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	933 class StringLiteral(Literal):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	934 """A string literal node."""
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	935 __slots__ = ['text']
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	936 def __init__(self, text):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	937 self.text = text
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	938 def __call__(self, kind, data, pos, namespaces, variables):
228 a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	939 return self.text
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	940 def __repr__(self):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	941 return '"%s"' % self.text
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	942
155 9a5aedda1099 * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	943 class NumberLiteral(Literal):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	944 """A number literal node."""
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	945 __slots__ = ['number']
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	946 def __init__(self, number):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	947 self.number = number
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	948 def __call__(self, kind, data, pos, namespaces, variables):
228 a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	949 return self.number
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	950 def __repr__(self):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	951 return str(self.number)
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	952
179 13909179e5e1 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	953 class VariableReference(Literal):
13909179e5e1 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	954 """A variable reference node."""
13909179e5e1 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	955 __slots__ = ['name']
13909179e5e1 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	956 def __init__(self, name):
13909179e5e1 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	957 self.name = name
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	958 def __call__(self, kind, data, pos, namespaces, variables):
228 a5b38b459cbb Add support for position predicates in XPath expressions. cmlenz parents: 224 diff changeset	959 return variables.get(self.name)
179 13909179e5e1 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	960 def __repr__(self):
215 94120e6b0ce4 A couple of minor XPath fixes. cmlenz parents: 211 diff changeset	961 return str(self.name)
179 13909179e5e1 Implemented support for XPath variables in predicates (#31). cmlenz parents: 169 diff changeset	962
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	963 # Operators
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	964
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	965 class AndOperator(object):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	966 """The boolean operator `and`."""
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	967 __slots__ = ['lval', 'rval']
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	968 def __init__(self, lval, rval):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	969 self.lval = lval
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	970 self.rval = rval
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	971 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	972 lval = self.lval(kind, data, pos, namespaces, variables)
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	973 if not lval:
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	974 return False
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	975 rval = self.rval(kind, data, pos, namespaces, variables)
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	976 return bool(rval)
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	977 def __repr__(self):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	978 return '%s and %s' % (self.lval, self.rval)
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	979
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	980 class EqualsOperator(object):
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	981 """The equality operator `=`."""
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	982 __slots__ = ['lval', 'rval']
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	983 def __init__(self, lval, rval):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	984 self.lval = lval
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	985 self.rval = rval
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	986 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	987 lval = self.lval(kind, data, pos, namespaces, variables)
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	988 rval = self.rval(kind, data, pos, namespaces, variables)
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	989 return lval == rval
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	990 def __repr__(self):
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	991 return '%s=%s' % (self.lval, self.rval)
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	992
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	993 class NotEqualsOperator(object):
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	994 """The equality operator `!=`."""
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	995 __slots__ = ['lval', 'rval']
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	996 def __init__(self, lval, rval):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	997 self.lval = lval
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	998 self.rval = rval
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	999 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1000 lval = self.lval(kind, data, pos, namespaces, variables)
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1001 rval = self.rval(kind, data, pos, namespaces, variables)
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1002 return lval != rval
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1003 def __repr__(self):
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1004 return '%s!=%s' % (self.lval, self.rval)
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1005
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1006 class OrOperator(object):
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1007 """The boolean operator `or`."""
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1008 __slots__ = ['lval', 'rval']
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1009 def __init__(self, lval, rval):
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1010 self.lval = lval
7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1011 self.rval = rval
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1012 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1013 lval = self.lval(kind, data, pos, namespaces, variables)
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1014 if lval:
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1015 return True
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1016 rval = self.rval(kind, data, pos, namespaces, variables)
161 7b1f07496bf7 Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	1017 return bool(rval)
137 ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1018 def __repr__(self):
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1019 return '%s or %s' % (self.lval, self.rval)
ac0bc4a6aeba Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	1020
162 456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1021 class GreaterThanOperator(object):
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1022 """The relational operator `>` (greater than)."""
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1023 __slots__ = ['lval', 'rval']
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1024 def __init__(self, lval, rval):
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1025 self.lval = lval
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1026 self.rval = rval
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1027 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1028 lval = self.lval(kind, data, pos, namespaces, variables)
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1029 rval = self.rval(kind, data, pos, namespaces, variables)
162 456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1030 return float(lval) > float(rval)
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1031 def __repr__(self):
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1032 return '%s>%s' % (self.lval, self.rval)
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1033
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1034 class GreaterThanOrEqualOperator(object):
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1035 """The relational operator `>=` (greater than or equal)."""
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1036 __slots__ = ['lval', 'rval']
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1037 def __init__(self, lval, rval):
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1038 self.lval = lval
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1039 self.rval = rval
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1040 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1041 lval = self.lval(kind, data, pos, namespaces, variables)
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1042 rval = self.rval(kind, data, pos, namespaces, variables)
162 456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1043 return float(lval) >= float(rval)
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1044 def __repr__(self):
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1045 return '%s>=%s' % (self.lval, self.rval)
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1046
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1047 class LessThanOperator(object):
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1048 """The relational operator `<` (less than)."""
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1049 __slots__ = ['lval', 'rval']
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1050 def __init__(self, lval, rval):
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1051 self.lval = lval
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1052 self.rval = rval
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1053 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1054 lval = self.lval(kind, data, pos, namespaces, variables)
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1055 rval = self.rval(kind, data, pos, namespaces, variables)
162 456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1056 return float(lval) < float(rval)
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1057 def __repr__(self):
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1058 return '%s<%s' % (self.lval, self.rval)
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1059
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1060 class LessThanOrEqualOperator(object):
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1061 """The relational operator `<=` (less than or equal)."""
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1062 __slots__ = ['lval', 'rval']
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1063 def __init__(self, lval, rval):
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1064 self.lval = lval
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1065 self.rval = rval
224 90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1066 def __call__(self, kind, data, pos, namespaces, variables):
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1067 lval = self.lval(kind, data, pos, namespaces, variables)
90d62225f411 Implement support for namespace prefixes in XPath expressions. cmlenz parents: 223 diff changeset	1068 rval = self.rval(kind, data, pos, namespaces, variables)
162 456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1069 return float(lval) <= float(rval)
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1070 def __repr__(self):
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1071 return '%s<=%s' % (self.lval, self.rval)
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1072
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1073 _operator_map = {'=': EqualsOperator, '!=': NotEqualsOperator,
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1074 '>': GreaterThanOperator, '>=': GreaterThanOrEqualOperator,
456039594db9 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1075 '<': LessThanOperator, '>=': LessThanOrEqualOperator}
333 e5ba8c5a30fe Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	1076
e5ba8c5a30fe Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	1077
e5ba8c5a30fe Fix XPath traversal in match templates. Previously, `div/p` would be treated the same as `div//p`, i.e. it would match all descendants and not just the immediate children. cmlenz parents: 330 diff changeset	1078 _DOTSLASHSLASH = (DESCENDANT_OR_SELF, PrincipalTypeTest(None), ())

Mercurial > genshi > mirror

annotate genshi/path.py @ 425:073640758a42 trunk