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

annotate markup/path.py @ 161:a25f9fc5787d

Various docstring additions and other cosmetic changes.

author	cmlenz
date	Wed, 16 Aug 2006 22:32:31 +0000
parents	cc707c5873f3
children	f767cf98e3e3

rev	line source
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	1 # -- coding: utf-8 --
821114ec4f69 Initial import. cmlenz parents: diff changeset	2 #
66 822089ae65ce Switch copyright to Edgewall and URLs to markup.edgewall.org. cmlenz parents: 61 diff changeset	3 # Copyright (C) 2006 Edgewall Software
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	4 # All rights reserved.
821114ec4f69 Initial import. cmlenz parents: diff changeset	5 #
821114ec4f69 Initial import. cmlenz parents: diff changeset	6 # This software is licensed as described in the file COPYING, which
821114ec4f69 Initial import. cmlenz parents: diff changeset	7 # you should have received as part of this distribution. The terms
66 822089ae65ce Switch copyright to Edgewall and URLs to markup.edgewall.org. cmlenz parents: 61 diff changeset	8 # are also available at http://markup.edgewall.org/wiki/License.
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	9 #
821114ec4f69 Initial import. cmlenz parents: diff changeset	10 # This software consists of voluntary contributions made by many
821114ec4f69 Initial import. cmlenz parents: diff changeset	11 # individuals. For the exact contribution history, see the revision
66 822089ae65ce Switch copyright to Edgewall and URLs to markup.edgewall.org. cmlenz parents: 61 diff changeset	12 # history and logs, available at http://markup.edgewall.org/log/.
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	13
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	14 """Basic support for evaluating XPath expressions against streams.
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	15
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	16 >>> from markup.input import XML
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	17 >>> doc = XML('''<doc>
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	18 ... <items count="2">
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	19 ... <item status="new">
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	20 ... <summary>Foo</summary>
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	21 ... </item>
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	22 ... <item status="closed">
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	23 ... <summary>Bar</summary>
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	24 ... </item>
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	25 ... </items>
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	26 ... </doc>''')
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	27 >>> print doc.select('items/item[@status="closed"]/summary/text()')
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	28 Bar
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	29
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	30 Because the XPath engine operates on markup streams (as opposed to tree
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	31 structures), it only implements a subset of the full XPath 1.0 language.
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	32 """
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	33
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	34 from math import ceil, floor
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	35 import re
821114ec4f69 Initial import. cmlenz parents: diff changeset	36
145 56d534eb53f9 * Fix error in expression evaluation when the expression evaluates to an iterable that does not produce event tuples. cmlenz parents: 139 diff changeset	37 from markup.core import Stream, START, END, TEXT, COMMENT, PI
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	38
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	39 __all__ = ['Path', 'PathSyntaxError']
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	40
821114ec4f69 Initial import. cmlenz parents: diff changeset	41
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	42 class Axis(object):
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	43 """Defines constants for the various supported XPath axes."""
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	44
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	45 ATTRIBUTE = 'attribute'
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	46 CHILD = 'child'
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	47 DESCENDANT = 'descendant'
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	48 DESCENDANT_OR_SELF = 'descendant-or-self'
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	49 NAMESPACE = 'namespace'
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	50 SELF = 'self'
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	51
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	52 def forname(cls, name):
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	53 """Return the axis constant for the given name, or `None` if no such
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	54 axis was defined.
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	55 """
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	56 return getattr(cls, name.upper().replace('-', '_'), None)
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	57 forname = classmethod(forname)
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	58
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	59
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	60 ATTRIBUTE = Axis.ATTRIBUTE
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	61 CHILD = Axis.CHILD
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	62 DESCENDANT = Axis.DESCENDANT
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	63 DESCENDANT_OR_SELF = Axis.DESCENDANT_OR_SELF
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	64 NAMESPACE = Axis.NAMESPACE
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	65 SELF = Axis.SELF
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	66
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	67
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	68 class Path(object):
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	69 """Implements basic XPath support on streams.
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	70
26 039fc5b87405 * 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
039fc5b87405 * 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
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	73 substream matching that path.
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	74 """
821114ec4f69 Initial import. cmlenz parents: diff changeset	75
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	76 def __init__(self, text, filename=None, lineno=-1):
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	77 """Create the path object from a string.
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	78
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	79 @param text: the path expression
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	80 """
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	81 self.source = text
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	82 self.paths = PathParser(text, filename, lineno).parse()
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	83
821114ec4f69 Initial import. cmlenz parents: diff changeset	84 def __repr__(self):
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	85 paths = []
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	86 for path in self.paths:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	87 steps = []
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	88 for axis, nodetest, predicates in path:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	89 steps.append('%s::%s' % (axis, nodetest))
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	90 for predicate in predicates:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	91 steps.append('[%s]' % predicate)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	92 paths.append('/'.join(steps))
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	93 return '<%s "%s">' % (self.__class__.__name__, '\|'.join(paths))
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	94
821114ec4f69 Initial import. cmlenz parents: diff changeset	95 def select(self, stream):
26 039fc5b87405 * 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.
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	97
039fc5b87405 * 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.
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	99
33 0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	100 >>> from markup.input import XML
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	101 >>> xml = XML('<root><elem><child>Text</child></elem></root>')
61 33c2702cf6da Use a different namespace than Kid uses. cmlenz parents: 38 diff changeset	102
33 0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	103 >>> print Path('child').select(xml)
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	104 <child>Text</child>
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	105
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	106 >>> print Path('child/text()').select(xml)
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	107 Text
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	108
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	109 @param stream: the stream to select from
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	110 @return: the substream matching the path, or an empty stream
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	111 """
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	112 stream = iter(stream)
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	113 def _generate():
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	114 test = self.test()
821114ec4f69 Initial import. cmlenz parents: diff changeset	115 for kind, data, pos in stream:
821114ec4f69 Initial import. cmlenz parents: diff changeset	116 result = test(kind, data, pos)
821114ec4f69 Initial import. cmlenz parents: diff changeset	117 if result is True:
821114ec4f69 Initial import. cmlenz parents: diff changeset	118 yield kind, data, pos
821114ec4f69 Initial import. cmlenz parents: diff changeset	119 depth = 1
821114ec4f69 Initial import. cmlenz parents: diff changeset	120 while depth > 0:
73 b0fd16111f2e Some more performance tweaks. cmlenz parents: 70 diff changeset	121 subkind, subdata, subpos = stream.next()
b0fd16111f2e Some more performance tweaks. cmlenz parents: 70 diff changeset	122 if subkind is START:
b0fd16111f2e Some more performance tweaks. cmlenz parents: 70 diff changeset	123 depth += 1
b0fd16111f2e Some more performance tweaks. cmlenz parents: 70 diff changeset	124 elif subkind is END:
b0fd16111f2e Some more performance tweaks. cmlenz parents: 70 diff changeset	125 depth -= 1
b0fd16111f2e Some more performance tweaks. cmlenz parents: 70 diff changeset	126 yield subkind, subdata, subpos
b0fd16111f2e Some more performance tweaks. cmlenz parents: 70 diff changeset	127 test(subkind, subdata, subpos)
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	128 elif result:
821114ec4f69 Initial import. cmlenz parents: diff changeset	129 yield result
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	130 return Stream(_generate())
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	131
38 fec9f4897415 Fix for #2 (incorrect context node in path expressions). Still some paths that produce incorrect results, but the common case seems to work now. cmlenz parents: 37 diff changeset	132 def test(self, ignore_context=False):
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	133 """Returns a function that can be used to track whether the path matches
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	134 a specific stream event.
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	135
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	136 The function returned expects the positional arguments `kind`, `data`,
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	137 and `pos`, i.e. basically an unpacked stream event. If the path matches
039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	138 the event, the function returns the match (for example, a `START` or
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	139 `TEXT` event.) Otherwise, it returns `None`.
33 0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	140
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	141 >>> from markup.input import XML
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	142 >>> xml = XML('<root><elem><child id="1"/></elem><child id="2"/></root>')
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	143 >>> test = Path('child').test()
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	144 >>> for kind, data, pos in xml:
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	145 ... if test(kind, data, pos):
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	146 ... print kind, data
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	147 START (u'child', [(u'id', u'1')])
0e1fc0211416 Add doctests for path module. cmlenz parents: 27 diff changeset	148 START (u'child', [(u'id', u'2')])
26 039fc5b87405 * Split out the XPath tests into a separate `unittest`-based file. cmlenz parents: 25 diff changeset	149 """
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	150 paths = [(steps, len(steps), [0]) for steps in self.paths]
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	151
821114ec4f69 Initial import. cmlenz parents: diff changeset	152 def _test(kind, data, pos):
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	153 for steps, size, stack in paths:
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	154 if not stack:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	155 continue
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	156 cursor = stack[-1]
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	157
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	158 if kind is END:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	159 stack.pop()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	160 continue
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	161 elif kind is START:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	162 stack.append(cursor)
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	163
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	164 while 1:
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	165 axis, nodetest, predicates = steps[cursor]
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	166
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	167 matched = nodetest(kind, data, pos)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	168 if matched and predicates:
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	169 for predicate in predicates:
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	170 if not predicate(kind, data, pos):
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	171 matched = None
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	172 break
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	173
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	174 if matched:
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	175 if cursor + 1 == size: # the last location step
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	176 if ignore_context or \
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	177 kind is not START or \
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	178 axis in (ATTRIBUTE, NAMESPACE, SELF) or \
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	179 len(stack) > 2:
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	180 return matched
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	181 else:
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	182 cursor += 1
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	183 stack[-1] = cursor
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	184
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	185 if axis is not SELF:
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	186 break
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	187
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	188 if not matched and kind is START \
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	189 and axis not in (DESCENDANT, DESCENDANT_OR_SELF):
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	190 # If this step is not a closure, it cannot be matched until
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	191 # the current element is closed... so we need to move the
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	192 # cursor back to the previous closure and retest that
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	193 # against the current element
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	194 backsteps = [step for step in steps[:cursor]
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	195 if step[0] in (DESCENDANT, DESCENDANT_OR_SELF)]
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	196 backsteps.reverse()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	197 for axis, nodetest, predicates in backsteps:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	198 matched = nodetest(kind, data, pos)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	199 if not matched:
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	200 cursor -= 1
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	201 break
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	202 stack[-1] = cursor
1 821114ec4f69 Initial import. cmlenz parents: diff changeset	203
821114ec4f69 Initial import. cmlenz parents: diff changeset	204 return None
821114ec4f69 Initial import. cmlenz parents: diff changeset	205
821114ec4f69 Initial import. cmlenz parents: diff changeset	206 return _test
821114ec4f69 Initial import. cmlenz parents: diff changeset	207
821114ec4f69 Initial import. cmlenz parents: diff changeset	208
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	209 class PathSyntaxError(Exception):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	210 """Exception raised when an XPath expression is syntactically incorrect."""
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	211
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	212 def __init__(self, message, filename=None, lineno=-1, offset=-1):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	213 if filename:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	214 message = '%s (%s, line %d)' % (message, filename, lineno)
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	215 Exception.__init__(self, message)
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	216 self.filename = filename
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	217 self.lineno = lineno
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	218 self.offset = offset
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	219
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	220
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	221 class PathParser(object):
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	222 """Tokenizes and parses an XPath expression."""
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	223
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	224 _QUOTES = (("'", "'"), ('"', '"'))
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	225 _TOKENS = ('::', ':', '..', '.', '//', '/', '[', ']', '()', '(', ')', '@',
121 22a7080ed242 Added support for the XPath functions `name()`, `namespace-uri()`, `local-name()`, and `not()`. cmlenz parents: 114 diff changeset	226 '=', '!=', '!', '\|', ',')
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	227 _tokenize = re.compile('("[^"]")\|(\'[^\']\')\|(%s)\|([^%s\s]+)\|\s+' % (
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	228 '\|'.join([re.escape(t) for t in _TOKENS]),
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	229 ''.join([re.escape(t[0]) for t in _TOKENS]))).findall
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	230
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	231 def __init__(self, text, filename=None, lineno=-1):
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	232 self.filename = filename
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	233 self.lineno = lineno
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	234 self.tokens = filter(None, [a or b or c or d for a, b, c, d in
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	235 self._tokenize(text)])
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	236 self.pos = 0
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	237
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	238 # Tokenizer
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	239
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	240 at_end = property(lambda self: self.pos == len(self.tokens) - 1)
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	241 cur_token = property(lambda self: self.tokens[self.pos])
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	242
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	243 def next_token(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	244 self.pos += 1
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	245 return self.tokens[self.pos]
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	246
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	247 def peek_token(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	248 if not self.at_end:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	249 return self.tokens[self.pos + 1]
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	250 return None
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	251
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	252 # Recursive descent parser
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	253
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	254 def parse(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	255 """Parses the XPath expression and returns a list of location path
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	256 tests.
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	257
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	258 For union expressions (such as `*\|text()`), this function returns one
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	259 test for each operand in the union. For patch expressions that don't
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	260 use the union operator, the function always returns a list of size 1.
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	261
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	262 Each path test in turn is a sequence of tests that correspond to the
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	263 location steps, each tuples of the form `(axis, testfunc, predicates)`
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	264 """
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	265 paths = [self._location_path()]
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	266 while self.cur_token == '\|':
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	267 self.next_token()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	268 paths.append(self._location_path())
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	269 if not self.at_end:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	270 raise PathSyntaxError('Unexpected token %r after end of expression'
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	271 % self.cur_token, self.filename, self.lineno)
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	272 return paths
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	273
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	274 def _location_path(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	275 steps = []
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	276 while True:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	277 if self.cur_token == '//':
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	278 steps.append((DESCENDANT_OR_SELF, NodeTest(), []))
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	279 self.next_token()
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	280 elif self.cur_token == '/' and not steps:
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	281 raise PathSyntaxError('Absolute location paths not supported',
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	282 self.filename, self.lineno)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	283
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	284 axis, nodetest, predicates = self._location_step()
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	285 if not axis:
145 56d534eb53f9 * Fix error in expression evaluation when the expression evaluates to an iterable that does not produce event tuples. cmlenz parents: 139 diff changeset	286 axis = CHILD
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	287 steps.append((axis, nodetest, predicates))
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	288
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	289 if self.at_end or not self.cur_token.startswith('/'):
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	290 break
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	291 self.next_token()
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	292
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	293 return steps
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	294
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	295 def _location_step(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	296 if self.cur_token == '@':
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	297 axis = ATTRIBUTE
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	298 self.next_token()
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	299 elif self.cur_token == '.':
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	300 axis = SELF
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	301 elif self.cur_token == '..':
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	302 raise PathSyntaxError('Unsupported axis "parent"', self.filename,
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	303 self.lineno)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	304 elif self.peek_token() == '::':
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	305 axis = Axis.forname(self.cur_token)
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	306 if axis is None:
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	307 raise PathSyntaxError('Unsupport axis "%s"' % axis,
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	308 self.filename, self.lineno)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	309 self.next_token()
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	310 self.next_token()
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	311 else:
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	312 axis = None
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	313 nodetest = self._node_test(axis or CHILD)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	314 predicates = []
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	315 while self.cur_token == '[':
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	316 predicates.append(self._predicate())
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	317 return axis, nodetest, predicates
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	318
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	319 def _node_test(self, axis=None):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	320 test = None
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	321 if self.peek_token() in ('(', '()'): # Node type test
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	322 test = self._node_type()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	323
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	324 else: # Name test
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	325 if self.cur_token == '*':
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	326 test = PrincipalTypeTest(axis)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	327 elif self.cur_token == '.':
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	328 test = NodeTest()
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	329 else:
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	330 test = LocalNameTest(axis, self.cur_token)
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	331
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	332 if not self.at_end:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	333 self.next_token()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	334 return test
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	335
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	336 def _node_type(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	337 name = self.cur_token
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	338 self.next_token()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	339
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	340 args = []
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	341 if self.cur_token != '()':
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	342 # The processing-instruction() function optionally accepts the
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	343 # name of the PI as argument, which must be a literal string
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	344 self.next_token() # (
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	345 if self.cur_token != ')':
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	346 string = self.cur_token
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	347 if (string[0], string[-1]) in self._QUOTES:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	348 string = string[1:-1]
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	349 args.append(string)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	350
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	351 cls = _nodetest_map.get(name)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	352 if not cls:
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	353 raise PathSyntaxError('%s() not allowed here' % name, self.filename,
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	354 self.lineno)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	355 return cls(*args)
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	356
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	357 def _predicate(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	358 assert self.cur_token == '['
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	359 self.next_token()
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	360 expr = self._or_expr()
121 22a7080ed242 Added support for the XPath functions `name()`, `namespace-uri()`, `local-name()`, and `not()`. cmlenz parents: 114 diff changeset	361 if self.cur_token != ']':
22a7080ed242 Added support for the XPath functions `name()`, `namespace-uri()`, `local-name()`, and `not()`. cmlenz parents: 114 diff changeset	362 raise PathSyntaxError('Expected "]" to close predicate, '
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	363 'but found "%s"' % self.cur_token,
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	364 self.filename, self.lineno)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	365 if not self.at_end:
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	366 self.next_token()
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	367 return expr
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	368
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	369 def _or_expr(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	370 expr = self._and_expr()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	371 while self.cur_token == 'or':
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	372 self.next_token()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	373 expr = OrOperator(expr, self._and_expr())
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	374 return expr
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	375
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	376 def _and_expr(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	377 expr = self._equality_expr()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	378 while self.cur_token == 'and':
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	379 self.next_token()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	380 expr = AndOperator(expr, self._equality_expr())
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	381 return expr
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	382
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	383 def _equality_expr(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	384 expr = self._primary_expr()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	385 while self.cur_token in ('=', '!='):
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	386 op = _operator_map.get(self.cur_token)
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	387 self.next_token()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	388 expr = op(expr, self._primary_expr())
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	389 return expr
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	390
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	391 def _primary_expr(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	392 token = self.cur_token
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	393 if len(token) > 1 and (token[0], token[-1]) in self._QUOTES:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	394 self.next_token()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	395 return StringLiteral(token[1:-1])
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	396 elif token[0].isdigit():
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	397 self.next_token()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	398 return NumberLiteral(float(token))
121 22a7080ed242 Added support for the XPath functions `name()`, `namespace-uri()`, `local-name()`, and `not()`. cmlenz parents: 114 diff changeset	399 elif not self.at_end and self.peek_token().startswith('('):
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	400 return self._function_call()
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	401 else:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	402 axis = None
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	403 if token == '@':
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	404 axis = ATTRIBUTE
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	405 self.next_token()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	406 return self._node_test(axis)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	407
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	408 def _function_call(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	409 name = self.cur_token
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	410 if self.next_token() == '()':
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	411 args = []
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	412 else:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	413 assert self.cur_token == '('
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	414 self.next_token()
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	415 args = [self._or_expr()]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	416 while self.cur_token == ',':
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	417 self.next_token()
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	418 args.append(self._or_expr())
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	419 if not self.cur_token == ')':
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	420 raise PathSyntaxError('Expected ")" to close function argument '
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	421 'list, but found "%s"' % self.cur_token,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	422 self.filename, self.lineno)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	423 self.next_token()
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	424 cls = _function_map.get(name)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	425 if not cls:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	426 raise PathSyntaxError('Unsupported function "%s"' % name,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	427 self.filename, self.lineno)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	428 return cls(*args)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	429
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	430
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	431 # Node tests
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	432
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	433 class PrincipalTypeTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	434 """Node test that matches any event with the given principal type."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	435 __slots__ = ['principal_type']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	436 def __init__(self, principal_type):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	437 self.principal_type = principal_type
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	438 def __call__(self, kind, data, pos):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	439 if kind is START:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	440 if self.principal_type is ATTRIBUTE:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	441 return data[1] or None
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	442 else:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	443 return True
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	444 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	445 return '*'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	446
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	447 class LocalNameTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	448 """Node test that matches any event with the given prinipal type and
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	449 local name.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	450 """
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	451 __slots__ = ['principal_type', 'name']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	452 def __init__(self, principal_type, name):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	453 self.principal_type = principal_type
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	454 self.name = name
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	455 def __call__(self, kind, data, pos):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	456 if kind is START:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	457 if self.principal_type is ATTRIBUTE and self.name in data[1]:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	458 return TEXT, data[1].get(self.name), pos
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	459 else:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	460 return data[0].localname == self.name
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	461 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	462 return self.name
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	463
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	464 class CommentNodeTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	465 """Node test that matches any comment events."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	466 __slots__ = []
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	467 def __call__(self, kind, data, pos):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	468 return kind is COMMENT and (kind, data, pos)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	469 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	470 return 'comment()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	471
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	472 class NodeTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	473 """Node test that matches any node."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	474 __slots__ = []
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	475 def __call__(self, kind, data, pos):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	476 if kind is START:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	477 return True
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	478 return kind, data, pos
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	479 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	480 return 'node()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	481
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	482 class ProcessingInstructionNodeTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	483 """Node test that matches any processing instruction event."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	484 __slots__ = ['target']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	485 def __init__(self, target=None):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	486 self.target = target
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	487 def __call__(self, kind, data, pos):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	488 if kind is PI and (not self.target or data[0] == self.target):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	489 return (kind, data, pos)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	490 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	491 arg = ''
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	492 if self.target:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	493 arg = '"' + self.target + '"'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	494 return 'processing-instruction(%s)' % arg
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	495
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	496 class TextNodeTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	497 """Node test that matches any text event."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	498 __slots__ = []
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	499 def __call__(self, kind, data, pos):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	500 return kind is TEXT and (kind, data, pos)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	501 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	502 return 'text()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	503
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	504 _nodetest_map = {'comment': CommentNodeTest, 'node': NodeTest,
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	505 'processing-instruction': ProcessingInstructionNodeTest,
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	506 'text': TextNodeTest}
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	507
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	508 # Functions
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	509
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	510 class Function(object):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	511 """Base class for function nodes in XPath expressions."""
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	512
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	513 class BooleanFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	514 """The `boolean` function, which converts its argument to a boolean
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	515 value.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	516 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	517 __slots__ = ['expr']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	518 def __init__(self, expr):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	519 self.expr = expr
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	520 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	521 val = self.expr(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	522 if type(val) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	523 val = val[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	524 return bool(val)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	525 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	526 return 'boolean(%r)' % self.expr
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	527
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	528 class CeilingFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	529 """The `ceiling` function, which returns the nearest lower integer number
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	530 for the given number.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	531 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	532 __slots__ = ['number']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	533 def __init__(self, number):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	534 self.number = number
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	535 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	536 number = self.number(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	537 if type(number) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	538 number = number[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	539 return ceil(float(number))
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	540 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	541 return 'ceiling(%r)' % self.number
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	542
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	543 class ConcatFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	544 """The `concat` function, which concatenates (joins) the variable number of
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	545 strings it gets as arguments.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	546 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	547 __slots__ = ['exprs']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	548 def __init__(self, *exprs):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	549 self.exprs = exprs
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	550 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	551 strings = []
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	552 for item in [expr(kind, data, pos) for expr in self.exprs]:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	553 if type(item) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	554 assert item[0] is TEXT
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	555 item = item[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	556 strings.append(item)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	557 return u''.join(strings)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	558 def __repr__(self):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	559 return 'concat(%s)' % [repr(expr for expr in self.exprs)]
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	560
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	561 class ContainsFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	562 """The `contains` function, which returns whether a string contains a given
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	563 substring.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	564 """
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	565 __slots__ = ['string1', 'string2']
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	566 def __init__(self, string1, string2):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	567 self.string1 = string1
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	568 self.string2 = string2
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	569 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	570 string1 = self.string1(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	571 if type(string1) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	572 string1 = string1[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	573 string2 = self.string2(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	574 if type(string2) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	575 string2 = string2[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	576 return string2 in string1
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	577 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	578 return 'contains(%r, %r)' % (self.string1, self.string2)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	579
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	580 class FalseFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	581 """The `false` function, which always returns the boolean `false` value."""
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	582 __slots__ = []
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	583 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	584 return False
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	585 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	586 return 'false()'
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	587
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	588 class FloorFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	589 """The `ceiling` function, which returns the nearest higher integer number
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	590 for the given number.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	591 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	592 __slots__ = ['number']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	593 def __init__(self, number):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	594 self.number = number
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	595 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	596 number = self.number(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	597 if type(number) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	598 number = number[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	599 return floor(float(number))
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	600 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	601 return 'floor(%r)' % self.number
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	602
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	603 class LocalNameFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	604 """The `local-name` function, which returns the local name of the current
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	605 element.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	606 """
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	607 __slots__ = []
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	608 def __call__(self, kind, data, pos):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	609 if kind is START:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	610 return TEXT, data[0].localname, pos
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	611 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	612 return 'local-name()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	613
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	614 class NameFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	615 """The `name` function, which returns the qualified name of the current
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	616 element.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	617 """
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	618 __slots__ = []
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	619 def __call__(self, kind, data, pos):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	620 if kind is START:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	621 return TEXT, data[0], pos
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	622 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	623 return 'name()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	624
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	625 class NamespaceUriFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	626 """The `namespace-uri` function, which returns the namespace URI of the
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	627 current element.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	628 """
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	629 __slots__ = []
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	630 def __call__(self, kind, data, pos):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	631 if kind is START:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	632 return TEXT, data[0].namespace, pos
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	633 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	634 return 'namespace-uri()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	635
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	636 class NotFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	637 """The `not` function, which returns the negated boolean value of its
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	638 argument.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	639 """
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	640 __slots__ = ['expr']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	641 def __init__(self, expr):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	642 self.expr = expr
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	643 def __call__(self, kind, data, pos):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	644 return not self.expr(kind, data, pos)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	645 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	646 return 'not(%s)' % self.expr
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	647
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	648 class NormalizeSpaceFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	649 """The `normalize-space` function, which removes leading and trailing
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	650 whitespace in the given string, and replaces multiple adjacent whitespace
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	651 characters inside the string with a single space.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	652 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	653 __slots__ = ['expr']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	654 _normalize = re.compile(r'\s{2,}').sub
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	655 def __init__(self, expr):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	656 self.expr = expr
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	657 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	658 string = self.expr(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	659 if type(string) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	660 string = string[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	661 return self._normalize(' ', string.strip())
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	662 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	663 return 'normalize-space(%s)' % repr(self.expr)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	664
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	665 class NumberFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	666 """The `number` function that converts its argument to a number."""
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	667 __slots__ = ['expr']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	668 def __init__(self, expr):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	669 self.expr = expr
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	670 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	671 val = self.expr(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	672 if type(val) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	673 val = val[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	674 return float(val)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	675 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	676 return 'number(%r)' % self.expr
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	677
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	678 class StartsWithFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	679 """The `starts-with` function that returns whether one string starts with
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	680 a given substring.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	681 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	682 __slots__ = ['string1', 'string2']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	683 def __init__(self, string1, string2):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	684 self.string1 = string2
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	685 self.string2 = string2
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	686 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	687 string1 = self.string1(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	688 if type(string1) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	689 string1 = string1[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	690 string2 = self.string2(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	691 if type(string2) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	692 string2 = string2[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	693 return string1.startswith(string2)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	694 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	695 return 'starts-with(%r, %r)' % (self.string1, self.string2)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	696
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	697 class StringLengthFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	698 """The `string-length` function that returns the length of the given
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	699 string.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	700 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	701 __slots__ = ['expr']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	702 def __init__(self, expr):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	703 self.expr = expr
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	704 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	705 string = self.expr(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	706 if type(string) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	707 string = string[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	708 return len(string)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	709 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	710 return 'string-length(%r)' % self.expr
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	711
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	712 class SubstringFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	713 """The `substring` function that returns the part of a string that starts
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	714 at the given offset, and optionally limited to the given length.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	715 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	716 __slots__ = ['string', 'start', 'length']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	717 def __init__(self, string, start, length=None):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	718 self.string = string
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	719 self.start = start
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	720 self.length = length
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	721 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	722 string = self.string(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	723 if type(string) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	724 string = string[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	725 start = self.start(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	726 if type(start) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	727 start = start[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	728 length = 0
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	729 if self.length is not None:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	730 length = self.length(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	731 if type(length) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	732 length = length[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	733 return string[int(start):len(string) - int(length)]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	734 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	735 if self.length is not None:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	736 return 'substring(%r, %r, %r)' % (self.string, self.start,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	737 self.length)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	738 else:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	739 return 'substring(%r, %r)' % (self.string, self.start)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	740
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	741 class SubstringAfterFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	742 """The `substring-after` function that returns the part of a string that
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	743 is found after the given substring.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	744 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	745 __slots__ = ['string1', 'string2']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	746 def __init__(self, string1, string2):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	747 self.string1 = string1
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	748 self.string2 = string2
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	749 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	750 string1 = self.string1(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	751 if type(string1) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	752 string1 = string1[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	753 string2 = self.string2(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	754 if type(string2) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	755 string2 = string2[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	756 index = string1.find(string2)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	757 if index >= 0:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	758 return string1[index + len(string2):]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	759 return u''
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	760 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	761 return 'substring-after(%r, %r)' % (self.string1, self.string2)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	762
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	763 class SubstringBeforeFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	764 """The `substring-before` function that returns the part of a string that
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	765 is found before the given substring.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	766 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	767 __slots__ = ['string1', 'string2']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	768 def __init__(self, string1, string2):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	769 self.string1 = string1
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	770 self.string2 = string2
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	771 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	772 string1 = self.string1(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	773 if type(string1) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	774 string1 = string1[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	775 string2 = self.string2(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	776 if type(string2) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	777 string2 = string2[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	778 index = string1.find(string2)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	779 if index >= 0:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	780 return string1[:index]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	781 return u''
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	782 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	783 return 'substring-after(%r, %r)' % (self.string1, self.string2)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	784
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	785 class TranslateFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	786 """The `translate` function that translates a set of characters in a
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	787 string to target set of characters.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	788 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	789 __slots__ = ['string', 'fromchars', 'tochars']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	790 def __init__(self, string, fromchars, tochars):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	791 self.string = string
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	792 self.fromchars = fromchars
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	793 self.tochars = tochars
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	794 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	795 string = self.string(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	796 if type(string) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	797 string = string[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	798 fromchars = self.fromchars(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	799 if type(fromchars) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	800 fromchars = fromchars[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	801 tochars = self.tochars(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	802 if type(tochars) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	803 tochars = tochars[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	804 table = dict(zip([ord(c) for c in fromchars],
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	805 [ord(c) for c in tochars]))
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	806 return string.translate(table)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	807 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	808 return 'translate(%r, %r, %r)' % (self.string, self.fromchars,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	809 self.tochars)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	810
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	811 class TrueFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	812 """The `true` function, which always returns the boolean `true` value."""
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	813 __slots__ = []
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	814 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	815 return True
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	816 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	817 return 'true()'
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	818
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	819 _function_map = {'boolean': BooleanFunction, 'ceiling': CeilingFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	820 'concat': ConcatFunction, 'contains': ContainsFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	821 'false': FalseFunction, 'floor': FloorFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	822 'local-name': LocalNameFunction, 'name': NameFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	823 'namespace-uri': NamespaceUriFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	824 'normalize-space': NormalizeSpaceFunction, 'not': NotFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	825 'number': NumberFunction, 'starts-with': StartsWithFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	826 'string-length': StringLengthFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	827 'substring': SubstringFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	828 'substring-after': SubstringAfterFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	829 'substring-before': SubstringBeforeFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	830 'translate': TranslateFunction, 'true': TrueFunction}
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	831
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	832 # Literals
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	833
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	834 class Literal(object):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	835 """Abstract base class for literal nodes."""
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	836
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	837 class StringLiteral(Literal):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	838 """A string literal node."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	839 __slots__ = ['text']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	840 def __init__(self, text):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	841 self.text = text
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	842 def __call__(self, kind, data, pos):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	843 return TEXT, self.text, (None, -1, -1)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	844 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	845 return '"%s"' % self.text
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	846
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	847 class NumberLiteral(Literal):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	848 """A number literal node."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	849 __slots__ = ['number']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	850 def __init__(self, number):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	851 self.number = number
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	852 def __call__(self, kind, data, pos):
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	853 return TEXT, self.number, (None, -1, -1)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	854 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	855 return str(self.number)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	856
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	857 # Operators
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	858
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	859 class AndOperator(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	860 """The boolean operator `and`."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	861 __slots__ = ['lval', 'rval']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	862 def __init__(self, lval, rval):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	863 self.lval = lval
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	864 self.rval = rval
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	865 def __call__(self, kind, data, pos):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	866 lval = self.lval(kind, data, pos)
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	867 if type(lval) is tuple:
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	868 lval = lval[1]
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	869 if not lval:
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	870 return False
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	871 rval = self.rval(kind, data, pos)
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	872 if type(rval) is tuple:
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	873 rval = rval[1]
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	874 return bool(rval)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	875 def __repr__(self):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	876 return '%s and %s' % (self.lval, self.rval)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	877
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	878 class EqualsOperator(object):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	879 """The equality operator `=`."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	880 __slots__ = ['lval', 'rval']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	881 def __init__(self, lval, rval):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	882 self.lval = lval
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	883 self.rval = rval
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	884 def __call__(self, kind, data, pos):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	885 lval = self.lval(kind, data, pos)
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	886 if type(lval) is tuple:
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	887 lval = lval[1]
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	888 rval = self.rval(kind, data, pos)
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	889 if type(rval) is tuple:
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	890 rval = rval[1]
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	891 return lval == rval
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	892 def __repr__(self):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	893 return '%s=%s' % (self.lval, self.rval)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	894
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	895 class NotEqualsOperator(object):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	896 """The equality operator `!=`."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	897 __slots__ = ['lval', 'rval']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	898 def __init__(self, lval, rval):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	899 self.lval = lval
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	900 self.rval = rval
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	901 def __call__(self, kind, data, pos):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	902 lval = self.lval(kind, data, pos)
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	903 if type(lval) is tuple:
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	904 lval = lval[1]
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	905 rval = self.rval(kind, data, pos)
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	906 if type(rval) is tuple:
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	907 rval = rval[1]
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	908 return lval != rval
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	909 def __repr__(self):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	910 return '%s!=%s' % (self.lval, self.rval)
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	911
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	912 class OrOperator(object):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	913 """The boolean operator `or`."""
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	914 __slots__ = ['lval', 'rval']
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	915 def __init__(self, lval, rval):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	916 self.lval = lval
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	917 self.rval = rval
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	918 def __call__(self, kind, data, pos):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	919 lval = self.lval(kind, data, pos)
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	920 if type(lval) is tuple:
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	921 lval = lval[1]
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	922 if lval:
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	923 return True
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	924 rval = self.rval(kind, data, pos)
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	925 if type(rval) is tuple:
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	926 rval = rval[1]
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	927 return bool(rval)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	928 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	929 return '%s or %s' % (self.lval, self.rval)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	930
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	931 _operator_map = {'=': EqualsOperator, '!=': NotEqualsOperator}

Mercurial > genshi > genshi-test

annotate markup/path.py @ 161:a25f9fc5787d