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

annotate markup/path.py @ 169:ce0bfdff334c

Fix syntax error in `path` module.

author	cmlenz
date	Fri, 18 Aug 2006 11:37:40 +0000
parents	110f90a0637c
children	a2e0a7986d19

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 = ('::', ':', '..', '.', '//', '/', '[', ']', '()', '(', ')', '@',
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	226 '=', '!=', '!', '\|', ',', '>=', '>', '<=', '<')
163 9df6f057efd3 Support for XPath number literals including decimal places. cmlenz parents: 162 diff changeset	227 _tokenize = re.compile('("[^"]")\|(\'[^\']\')\|((?:\d+)?\.\d+)\|(%s)\|([^%s\s]+)\|\s+' % (
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	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
163 9df6f057efd3 Support for XPath number literals including decimal places. cmlenz parents: 162 diff changeset	234 self.tokens = filter(None, [dqstr or sqstr or number or token or name
9df6f057efd3 Support for XPath number literals including decimal places. cmlenz parents: 162 diff changeset	235 for dqstr, sqstr, number, token, name in
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	236 self._tokenize(text)])
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	237 self.pos = 0
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	238
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	239 # Tokenizer
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	240
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	241 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	242 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	243
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	244 def next_token(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	245 self.pos += 1
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	246 return self.tokens[self.pos]
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	247
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	248 def peek_token(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	249 if not self.at_end:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	250 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	251 return None
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	252
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	253 # Recursive descent parser
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	254
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	255 def parse(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	256 """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	257 tests.
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	258
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	259 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	260 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	261 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	262
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	263 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	264 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	265 """
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	266 paths = [self._location_path()]
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	267 while self.cur_token == '\|':
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	268 self.next_token()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	269 paths.append(self._location_path())
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	270 if not self.at_end:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	271 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	272 % 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	273 return paths
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	274
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	275 def _location_path(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	276 steps = []
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	277 while True:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	278 if self.cur_token == '//':
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	279 steps.append((DESCENDANT_OR_SELF, NodeTest(), []))
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	280 self.next_token()
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	281 elif self.cur_token == '/' and not steps:
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	282 raise PathSyntaxError('Absolute location paths not supported',
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	283 self.filename, self.lineno)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	284
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	285 axis, nodetest, predicates = self._location_step()
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	286 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	287 axis = CHILD
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	288 steps.append((axis, nodetest, predicates))
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	289
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	290 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	291 break
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	292 self.next_token()
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	293
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	294 return steps
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	295
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	296 def _location_step(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	297 if self.cur_token == '@':
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	298 axis = ATTRIBUTE
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	299 self.next_token()
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	300 elif self.cur_token == '.':
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	301 axis = SELF
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	302 elif self.cur_token == '..':
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	303 raise PathSyntaxError('Unsupported axis "parent"', self.filename,
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	304 self.lineno)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	305 elif self.peek_token() == '::':
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	306 axis = Axis.forname(self.cur_token)
8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	307 if axis is None:
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	308 raise PathSyntaxError('Unsupport axis "%s"' % axis,
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	309 self.filename, self.lineno)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	310 self.next_token()
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	311 self.next_token()
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	312 else:
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	313 axis = None
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	314 nodetest = self._node_test(axis or CHILD)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	315 predicates = []
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	316 while self.cur_token == '[':
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	317 predicates.append(self._predicate())
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	318 return axis, nodetest, predicates
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	319
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	320 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	321 test = None
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	322 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	323 test = self._node_type()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	324
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	325 else: # Name test
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	326 if self.cur_token == '*':
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	327 test = PrincipalTypeTest(axis)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	328 elif self.cur_token == '.':
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	329 test = NodeTest()
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	330 else:
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	331 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	332
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	333 if not self.at_end:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	334 self.next_token()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	335 return test
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	336
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	337 def _node_type(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	338 name = self.cur_token
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	339 self.next_token()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	340
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	341 args = []
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	342 if self.cur_token != '()':
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	343 # The processing-instruction() function optionally accepts the
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	344 # name of the PI as argument, which must be a literal string
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	345 self.next_token() # (
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	346 if self.cur_token != ')':
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	347 string = self.cur_token
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	348 if (string[0], string[-1]) in self._QUOTES:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	349 string = string[1:-1]
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	350 args.append(string)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	351
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	352 cls = _nodetest_map.get(name)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	353 if not cls:
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	354 raise PathSyntaxError('%s() not allowed here' % name, self.filename,
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	355 self.lineno)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	356 return cls(*args)
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	357
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	358 def _predicate(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	359 assert self.cur_token == '['
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	360 self.next_token()
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	361 expr = self._or_expr()
164 110f90a0637c Report error when position predicates are used in XPath expressions (which is NYI). cmlenz parents: 163 diff changeset	362 if isinstance(expr, NumberLiteral):
110f90a0637c Report error when position predicates are used in XPath expressions (which is NYI). cmlenz parents: 163 diff changeset	363 raise PathSyntaxError('Position predicates not yet supported')
121 22a7080ed242 Added support for the XPath functions `name()`, `namespace-uri()`, `local-name()`, and `not()`. cmlenz parents: 114 diff changeset	364 if self.cur_token != ']':
22a7080ed242 Added support for the XPath functions `name()`, `namespace-uri()`, `local-name()`, and `not()`. cmlenz parents: 114 diff changeset	365 raise PathSyntaxError('Expected "]" to close predicate, '
139 54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	366 'but found "%s"' % self.cur_token,
54131cbb91a5 Implement position reporting for XPath syntax errors. Closes #20. cmlenz parents: 137 diff changeset	367 self.filename, self.lineno)
111 8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	368 if not self.at_end:
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	369 self.next_token()
8a4d9064f363 Some fixes and more unit tests for the XPath engine. cmlenz parents: 106 diff changeset	370 return expr
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	371
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	372 def _or_expr(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	373 expr = self._and_expr()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	374 while self.cur_token == 'or':
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	375 self.next_token()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	376 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	377 return expr
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	378
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	379 def _and_expr(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	380 expr = self._equality_expr()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	381 while self.cur_token == 'and':
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	382 self.next_token()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	383 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	384 return expr
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	385
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	386 def _equality_expr(self):
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	387 expr = self._relational_expr()
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	388 while self.cur_token in ('=', '!='):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	389 op = _operator_map[self.cur_token]
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	390 self.next_token()
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	391 expr = op(expr, self._relational_expr())
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	392 return expr
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	393
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	394 def _relational_expr(self):
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	395 expr = self._primary_expr()
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	396 while self.cur_token in ('>', '>=', '<', '>='):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	397 op = _operator_map[self.cur_token]
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	398 self.next_token()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	399 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	400 return expr
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	401
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	402 def _primary_expr(self):
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	403 token = self.cur_token
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	404 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	405 self.next_token()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	406 return StringLiteral(token[1:-1])
163 9df6f057efd3 Support for XPath number literals including decimal places. cmlenz parents: 162 diff changeset	407 elif token[0].isdigit() or token[0] == '.':
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	408 self.next_token()
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	409 return NumberLiteral(float(token))
121 22a7080ed242 Added support for the XPath functions `name()`, `namespace-uri()`, `local-name()`, and `not()`. cmlenz parents: 114 diff changeset	410 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	411 return self._function_call()
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	412 else:
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	413 axis = None
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	414 if token == '@':
114 8f53c3ad385c Use constants for axes in XPath engine. cmlenz parents: 111 diff changeset	415 axis = ATTRIBUTE
106 61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	416 self.next_token()
61fa4cadb766 Complete rewrite of the XPath parsing, which was a mess before. Closes #19. cmlenz parents: 77 diff changeset	417 return self._node_test(axis)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	418
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	419 def _function_call(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	420 name = self.cur_token
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	421 if self.next_token() == '()':
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	422 args = []
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	423 else:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	424 assert self.cur_token == '('
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	425 self.next_token()
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	426 args = [self._or_expr()]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	427 while self.cur_token == ',':
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	428 self.next_token()
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	429 args.append(self._or_expr())
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	430 if not self.cur_token == ')':
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	431 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	432 '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	433 self.filename, self.lineno)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	434 self.next_token()
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	435 cls = _function_map.get(name)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	436 if not cls:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	437 raise PathSyntaxError('Unsupported function "%s"' % name,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	438 self.filename, self.lineno)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	439 return cls(*args)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	440
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	441
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	442 # Node tests
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	443
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	444 class PrincipalTypeTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	445 """Node test that matches any event with the given principal type."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	446 __slots__ = ['principal_type']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	447 def __init__(self, principal_type):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	448 self.principal_type = principal_type
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	449 def __call__(self, kind, data, pos):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	450 if kind is START:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	451 if self.principal_type is ATTRIBUTE:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	452 return data[1] or None
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	453 else:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	454 return True
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	455 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	456 return '*'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	457
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	458 class LocalNameTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	459 """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	460 local name.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	461 """
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	462 __slots__ = ['principal_type', 'name']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	463 def __init__(self, principal_type, name):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	464 self.principal_type = principal_type
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	465 self.name = name
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	466 def __call__(self, kind, data, pos):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	467 if kind is START:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	468 if self.principal_type is ATTRIBUTE and self.name in data[1]:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	469 return TEXT, data[1].get(self.name), pos
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	470 else:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	471 return data[0].localname == self.name
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	472 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	473 return self.name
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	474
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	475 class CommentNodeTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	476 """Node test that matches any comment events."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	477 __slots__ = []
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	478 def __call__(self, kind, data, pos):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	479 return kind is COMMENT and (kind, data, pos)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	480 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	481 return 'comment()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	482
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	483 class NodeTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	484 """Node test that matches any node."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	485 __slots__ = []
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	486 def __call__(self, kind, data, pos):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	487 if kind is START:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	488 return True
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 return 'node()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	492
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	493 class ProcessingInstructionNodeTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	494 """Node test that matches any processing instruction event."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	495 __slots__ = ['target']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	496 def __init__(self, target=None):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	497 self.target = target
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	498 def __call__(self, kind, data, pos):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	499 if kind is PI and (not self.target or data[0] == self.target):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	500 return (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 arg = ''
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	503 if self.target:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	504 arg = '"' + self.target + '"'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	505 return 'processing-instruction(%s)' % arg
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	506
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	507 class TextNodeTest(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	508 """Node test that matches any text event."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	509 __slots__ = []
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	510 def __call__(self, kind, data, pos):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	511 return kind is TEXT and (kind, data, pos)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	512 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	513 return 'text()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	514
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	515 _nodetest_map = {'comment': CommentNodeTest, 'node': NodeTest,
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	516 'processing-instruction': ProcessingInstructionNodeTest,
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	517 'text': TextNodeTest}
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	518
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	519 # Functions
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	520
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	521 class Function(object):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	522 """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	523
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	524 class BooleanFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	525 """The `boolean` function, which converts its argument to a boolean
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	526 value.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	527 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	528 __slots__ = ['expr']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	529 def __init__(self, expr):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	530 self.expr = expr
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	531 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	532 val = self.expr(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	533 if type(val) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	534 val = val[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	535 return bool(val)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	536 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	537 return 'boolean(%r)' % self.expr
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	538
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	539 class CeilingFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	540 """The `ceiling` function, which returns the nearest lower integer number
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	541 for the given number.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	542 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	543 __slots__ = ['number']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	544 def __init__(self, number):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	545 self.number = number
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	546 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	547 number = self.number(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	548 if type(number) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	549 number = number[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	550 return ceil(float(number))
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	551 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	552 return 'ceiling(%r)' % self.number
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	553
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	554 class ConcatFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	555 """The `concat` function, which concatenates (joins) the variable number of
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	556 strings it gets as arguments.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	557 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	558 __slots__ = ['exprs']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	559 def __init__(self, *exprs):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	560 self.exprs = exprs
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	561 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	562 strings = []
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	563 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	564 if type(item) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	565 assert item[0] is TEXT
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	566 item = item[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	567 strings.append(item)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	568 return u''.join(strings)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	569 def __repr__(self):
169 ce0bfdff334c Fix syntax error in `path` module. cmlenz parents: 164 diff changeset	570 return 'concat(%s)' % ', '.join([repr(expr) for expr in self.exprs])
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	571
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	572 class ContainsFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	573 """The `contains` function, which returns whether a string contains a given
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	574 substring.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	575 """
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	576 __slots__ = ['string1', 'string2']
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	577 def __init__(self, string1, string2):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	578 self.string1 = string1
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	579 self.string2 = string2
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	580 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	581 string1 = self.string1(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	582 if type(string1) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	583 string1 = string1[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	584 string2 = self.string2(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	585 if type(string2) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	586 string2 = string2[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	587 return string2 in string1
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	588 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	589 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	590
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	591 class FalseFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	592 """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	593 __slots__ = []
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	594 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	595 return False
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	596 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	597 return 'false()'
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	598
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	599 class FloorFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	600 """The `ceiling` function, which returns the nearest higher integer number
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	601 for the given number.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	602 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	603 __slots__ = ['number']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	604 def __init__(self, number):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	605 self.number = number
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	606 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	607 number = self.number(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	608 if type(number) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	609 number = number[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	610 return floor(float(number))
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	611 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	612 return 'floor(%r)' % self.number
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	613
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	614 class LocalNameFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	615 """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	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].localname, 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 'local-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 NameFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	626 """The `name` function, which returns the qualified name of the current
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	627 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], 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 'name()'
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 NamespaceUriFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	637 """The `namespace-uri` function, which returns the namespace URI of the
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	638 current element.
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__ = []
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	641 def __call__(self, kind, data, pos):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	642 if kind is START:
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	643 return TEXT, data[0].namespace, pos
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	644 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	645 return 'namespace-uri()'
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	646
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	647 class NotFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	648 """The `not` function, which returns the negated boolean value of its
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	649 argument.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	650 """
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	651 __slots__ = ['expr']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	652 def __init__(self, expr):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	653 self.expr = expr
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	654 def __call__(self, kind, data, pos):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	655 return not self.expr(kind, data, pos)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	656 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	657 return 'not(%s)' % self.expr
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	658
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	659 class NormalizeSpaceFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	660 """The `normalize-space` function, which removes leading and trailing
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	661 whitespace in the given string, and replaces multiple adjacent whitespace
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	662 characters inside the string with a single space.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	663 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	664 __slots__ = ['expr']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	665 _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	666 def __init__(self, expr):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	667 self.expr = expr
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	668 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	669 string = self.expr(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	670 if type(string) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	671 string = string[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	672 return self._normalize(' ', string.strip())
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	673 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	674 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	675
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	676 class NumberFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	677 """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	678 __slots__ = ['expr']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	679 def __init__(self, expr):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	680 self.expr = expr
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	681 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	682 val = self.expr(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	683 if type(val) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	684 val = val[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	685 return float(val)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	686 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	687 return 'number(%r)' % self.expr
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	688
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	689 class RoundFunction(Function):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	690 """The `round` function, which returns the nearest integer number for the
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	691 given number.
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	692 """
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	693 __slots__ = ['number']
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	694 def __init__(self, number):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	695 self.number = number
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	696 def __call__(self, kind, data, pos):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	697 number = self.number(kind, data, pos)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	698 if type(number) is tuple:
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	699 number = number[1]
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	700 return round(float(number))
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	701 def __repr__(self):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	702 return 'round(%r)' % self.number
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	703
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	704 class StartsWithFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	705 """The `starts-with` function that returns whether one string starts with
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	706 a given substring.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	707 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	708 __slots__ = ['string1', 'string2']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	709 def __init__(self, string1, string2):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	710 self.string1 = string2
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	711 self.string2 = string2
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	712 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	713 string1 = self.string1(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	714 if type(string1) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	715 string1 = string1[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	716 string2 = self.string2(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	717 if type(string2) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	718 string2 = string2[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	719 return string1.startswith(string2)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	720 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	721 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	722
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	723 class StringLengthFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	724 """The `string-length` function that returns the length of the given
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	725 string.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	726 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	727 __slots__ = ['expr']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	728 def __init__(self, expr):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	729 self.expr = expr
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	730 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	731 string = self.expr(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	732 if type(string) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	733 string = string[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	734 return len(string)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	735 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	736 return 'string-length(%r)' % self.expr
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	737
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	738 class SubstringFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	739 """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	740 at the given offset, and optionally limited to the given length.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	741 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	742 __slots__ = ['string', 'start', 'length']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	743 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	744 self.string = string
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	745 self.start = start
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	746 self.length = length
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	747 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	748 string = self.string(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	749 if type(string) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	750 string = string[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	751 start = self.start(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	752 if type(start) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	753 start = start[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	754 length = 0
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	755 if self.length is not None:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	756 length = self.length(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	757 if type(length) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	758 length = length[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	759 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	760 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	761 if self.length is not None:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	762 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	763 self.length)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	764 else:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	765 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	766
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	767 class SubstringAfterFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	768 """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	769 is found after the given substring.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	770 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	771 __slots__ = ['string1', 'string2']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	772 def __init__(self, string1, string2):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	773 self.string1 = string1
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	774 self.string2 = string2
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	775 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	776 string1 = self.string1(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	777 if type(string1) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	778 string1 = string1[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	779 string2 = self.string2(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	780 if type(string2) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	781 string2 = string2[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	782 index = string1.find(string2)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	783 if index >= 0:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	784 return string1[index + len(string2):]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	785 return u''
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	786 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	787 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	788
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	789 class SubstringBeforeFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	790 """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	791 is found before the given substring.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	792 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	793 __slots__ = ['string1', 'string2']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	794 def __init__(self, string1, string2):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	795 self.string1 = string1
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	796 self.string2 = string2
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	797 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	798 string1 = self.string1(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	799 if type(string1) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	800 string1 = string1[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	801 string2 = self.string2(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	802 if type(string2) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	803 string2 = string2[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	804 index = string1.find(string2)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	805 if index >= 0:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	806 return string1[:index]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	807 return u''
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	808 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	809 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	810
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	811 class TranslateFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	812 """The `translate` function that translates a set of characters in a
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	813 string to target set of characters.
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	814 """
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	815 __slots__ = ['string', 'fromchars', 'tochars']
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	816 def __init__(self, string, fromchars, tochars):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	817 self.string = string
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	818 self.fromchars = fromchars
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	819 self.tochars = tochars
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	820 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	821 string = self.string(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	822 if type(string) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	823 string = string[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	824 fromchars = self.fromchars(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	825 if type(fromchars) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	826 fromchars = fromchars[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	827 tochars = self.tochars(kind, data, pos)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	828 if type(tochars) is tuple:
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	829 tochars = tochars[1]
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	830 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	831 [ord(c) for c in tochars]))
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	832 return string.translate(table)
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	833 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	834 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	835 self.tochars)
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 TrueFunction(Function):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	838 """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	839 __slots__ = []
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	840 def __call__(self, kind, data, pos):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	841 return True
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	842 def __repr__(self):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	843 return 'true()'
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	844
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	845 _function_map = {'boolean': BooleanFunction, 'ceiling': CeilingFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	846 'concat': ConcatFunction, 'contains': ContainsFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	847 'false': FalseFunction, 'floor': FloorFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	848 'local-name': LocalNameFunction, 'name': NameFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	849 'namespace-uri': NamespaceUriFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	850 'normalize-space': NormalizeSpaceFunction, 'not': NotFunction,
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	851 'number': NumberFunction, 'round': RoundFunction,
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	852 'starts-with': StartsWithFunction,
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	853 'string-length': StringLengthFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	854 'substring': SubstringFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	855 'substring-after': SubstringAfterFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	856 'substring-before': SubstringBeforeFunction,
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	857 'translate': TranslateFunction, 'true': TrueFunction}
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	858
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	859 # Literals
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	860
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	861 class Literal(object):
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	862 """Abstract base class for literal nodes."""
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	863
50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	864 class StringLiteral(Literal):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	865 """A string literal node."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	866 __slots__ = ['text']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	867 def __init__(self, text):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	868 self.text = text
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	869 def __call__(self, kind, data, pos):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	870 return TEXT, self.text, (None, -1, -1)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	871 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	872 return '"%s"' % self.text
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	873
155 50d4b08017df * String literals in XPath expressions that contains spaces are now tokenizes correctly. cmlenz parents: 145 diff changeset	874 class NumberLiteral(Literal):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	875 """A number literal node."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	876 __slots__ = ['number']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	877 def __init__(self, number):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	878 self.number = number
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	879 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	880 return TEXT, self.number, (None, -1, -1)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	881 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	882 return str(self.number)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	883
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	884 # Operators
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	885
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	886 class AndOperator(object):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	887 """The boolean operator `and`."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	888 __slots__ = ['lval', 'rval']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	889 def __init__(self, lval, rval):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	890 self.lval = lval
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	891 self.rval = rval
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	892 def __call__(self, kind, data, pos):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	893 lval = self.lval(kind, data, pos)
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	894 if type(lval) is tuple:
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	895 lval = lval[1]
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	896 if not lval:
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	897 return False
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	898 rval = self.rval(kind, data, pos)
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	899 if type(rval) is tuple:
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	900 rval = rval[1]
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	901 return bool(rval)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	902 def __repr__(self):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	903 return '%s and %s' % (self.lval, self.rval)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	904
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	905 class EqualsOperator(object):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	906 """The equality operator `=`."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	907 __slots__ = ['lval', 'rval']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	908 def __init__(self, lval, rval):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	909 self.lval = lval
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	910 self.rval = rval
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	911 def __call__(self, kind, data, pos):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	912 lval = self.lval(kind, data, pos)
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	913 if type(lval) is tuple:
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	914 lval = lval[1]
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	915 rval = self.rval(kind, data, pos)
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	916 if type(rval) is tuple:
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	917 rval = rval[1]
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	918 return lval == rval
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	919 def __repr__(self):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	920 return '%s=%s' % (self.lval, self.rval)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	921
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	922 class NotEqualsOperator(object):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	923 """The equality operator `!=`."""
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	924 __slots__ = ['lval', 'rval']
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	925 def __init__(self, lval, rval):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	926 self.lval = lval
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	927 self.rval = rval
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	928 def __call__(self, kind, data, pos):
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	929 lval = self.lval(kind, data, pos)
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	930 if type(lval) is tuple:
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	931 lval = lval[1]
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	932 rval = self.rval(kind, data, pos)
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	933 if type(rval) is tuple:
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	934 rval = rval[1]
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	935 return lval != rval
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	936 def __repr__(self):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	937 return '%s!=%s' % (self.lval, self.rval)
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	938
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	939 class OrOperator(object):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	940 """The boolean operator `or`."""
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	941 __slots__ = ['lval', 'rval']
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	942 def __init__(self, lval, rval):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	943 self.lval = lval
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	944 self.rval = rval
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	945 def __call__(self, kind, data, pos):
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	946 lval = self.lval(kind, data, pos)
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	947 if type(lval) is tuple:
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	948 lval = lval[1]
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	949 if lval:
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	950 return True
161 a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	951 rval = self.rval(kind, data, pos)
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	952 if type(rval) is tuple:
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	953 rval = rval[1]
a25f9fc5787d Various docstring additions and other cosmetic changes. cmlenz parents: 156 diff changeset	954 return bool(rval)
137 38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	955 def __repr__(self):
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	956 return '%s or %s' % (self.lval, self.rval)
38ddb21b6fa4 Further cleanup of XPath engine. cmlenz parents: 122 diff changeset	957
162 f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	958 class GreaterThanOperator(object):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	959 """The relational operator `>` (greater than)."""
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	960 __slots__ = ['lval', 'rval']
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	961 def __init__(self, lval, rval):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	962 self.lval = lval
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	963 self.rval = rval
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	964 def __call__(self, kind, data, pos):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	965 lval = self.lval(kind, data, pos)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	966 if type(lval) is tuple:
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	967 lval = lval[1]
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	968 rval = self.rval(kind, data, pos)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	969 if type(rval) is tuple:
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	970 rval = rval[1]
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	971 return float(lval) > float(rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	972 def __repr__(self):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	973 return '%s>%s' % (self.lval, self.rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	974
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	975 class GreaterThanOperator(object):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	976 """The relational operator `>` (greater than)."""
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	977 __slots__ = ['lval', 'rval']
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	978 def __init__(self, lval, rval):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	979 self.lval = lval
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	980 self.rval = rval
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	981 def __call__(self, kind, data, pos):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	982 lval = self.lval(kind, data, pos)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	983 if type(lval) is tuple:
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	984 lval = lval[1]
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	985 rval = self.rval(kind, data, pos)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	986 if type(rval) is tuple:
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	987 rval = rval[1]
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	988 return float(lval) > float(rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	989 def __repr__(self):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	990 return '%s>%s' % (self.lval, self.rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	991
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	992 class GreaterThanOrEqualOperator(object):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	993 """The relational operator `>=` (greater than or equal)."""
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	994 __slots__ = ['lval', 'rval']
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	995 def __init__(self, lval, rval):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	996 self.lval = lval
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	997 self.rval = rval
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	998 def __call__(self, kind, data, pos):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	999 lval = self.lval(kind, data, pos)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1000 if type(lval) is tuple:
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1001 lval = lval[1]
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1002 rval = self.rval(kind, data, pos)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1003 if type(rval) is tuple:
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1004 rval = rval[1]
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1005 return float(lval) >= float(rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1006 def __repr__(self):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1007 return '%s>=%s' % (self.lval, self.rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1008
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1009 class LessThanOperator(object):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1010 """The relational operator `<` (less than)."""
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1011 __slots__ = ['lval', 'rval']
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1012 def __init__(self, lval, rval):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1013 self.lval = lval
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1014 self.rval = rval
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1015 def __call__(self, kind, data, pos):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1016 lval = self.lval(kind, data, pos)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1017 if type(lval) is tuple:
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1018 lval = lval[1]
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1019 rval = self.rval(kind, data, pos)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1020 if type(rval) is tuple:
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1021 rval = rval[1]
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1022 return float(lval) < float(rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1023 def __repr__(self):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1024 return '%s<%s' % (self.lval, self.rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1025
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1026 class LessThanOrEqualOperator(object):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1027 """The relational operator `<=` (less than or equal)."""
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1028 __slots__ = ['lval', 'rval']
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1029 def __init__(self, lval, rval):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1030 self.lval = lval
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1031 self.rval = rval
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1032 def __call__(self, kind, data, pos):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1033 lval = self.lval(kind, data, pos)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1034 if type(lval) is tuple:
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1035 lval = lval[1]
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1036 rval = self.rval(kind, data, pos)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1037 if type(rval) is tuple:
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1038 rval = rval[1]
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1039 return float(lval) <= float(rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1040 def __repr__(self):
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1041 return '%s<=%s' % (self.lval, self.rval)
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1042
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1043 _operator_map = {'=': EqualsOperator, '!=': NotEqualsOperator,
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1044 '>': GreaterThanOperator, '>=': GreaterThanOrEqualOperator,
f767cf98e3e3 Implement the XPath relational operators and the `round()` function. cmlenz parents: 161 diff changeset	1045 '<': LessThanOperator, '>=': LessThanOrEqualOperator}

Mercurial > genshi > genshi-test

annotate markup/path.py @ 169:ce0bfdff334c