Mercurial > p > roundup > code
comparison roundup/cgi/TAL/TALParser.py @ 1049:b9988e118055
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| author | Richard Jones <richard@users.sourceforge.net> |
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| date | Thu, 05 Sep 2002 00:37:09 +0000 |
| parents | |
| children | fc52d57c6c3e |
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| 1048:1250251f2793 | 1049:b9988e118055 |
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| 1 ############################################################################## | |
| 2 # | |
| 3 # Copyright (c) 2001, 2002 Zope Corporation and Contributors. | |
| 4 # All Rights Reserved. | |
| 5 # | |
| 6 # This software is subject to the provisions of the Zope Public License, | |
| 7 # Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution. | |
| 8 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED | |
| 9 # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| 10 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS | |
| 11 # FOR A PARTICULAR PURPOSE | |
| 12 # | |
| 13 ############################################################################## | |
| 14 """ | |
| 15 Parse XML and compile to TALInterpreter intermediate code. | |
| 16 """ | |
| 17 | |
| 18 import string | |
| 19 from XMLParser import XMLParser | |
| 20 from TALDefs import * | |
| 21 from TALGenerator import TALGenerator | |
| 22 | |
| 23 class TALParser(XMLParser): | |
| 24 | |
| 25 ordered_attributes = 1 | |
| 26 | |
| 27 def __init__(self, gen=None): # Override | |
| 28 XMLParser.__init__(self) | |
| 29 if gen is None: | |
| 30 gen = TALGenerator() | |
| 31 self.gen = gen | |
| 32 self.nsStack = [] | |
| 33 self.nsDict = {XML_NS: 'xml'} | |
| 34 self.nsNew = [] | |
| 35 | |
| 36 def getCode(self): | |
| 37 return self.gen.getCode() | |
| 38 | |
| 39 def getWarnings(self): | |
| 40 return () | |
| 41 | |
| 42 def StartNamespaceDeclHandler(self, prefix, uri): | |
| 43 self.nsStack.append(self.nsDict.copy()) | |
| 44 self.nsDict[uri] = prefix | |
| 45 self.nsNew.append((prefix, uri)) | |
| 46 | |
| 47 def EndNamespaceDeclHandler(self, prefix): | |
| 48 self.nsDict = self.nsStack.pop() | |
| 49 | |
| 50 def StartElementHandler(self, name, attrs): | |
| 51 if self.ordered_attributes: | |
| 52 # attrs is a list of alternating names and values | |
| 53 attrlist = [] | |
| 54 for i in range(0, len(attrs), 2): | |
| 55 key = attrs[i] | |
| 56 value = attrs[i+1] | |
| 57 attrlist.append((key, value)) | |
| 58 else: | |
| 59 # attrs is a dict of {name: value} | |
| 60 attrlist = attrs.items() | |
| 61 attrlist.sort() # For definiteness | |
| 62 name, attrlist, taldict, metaldict = self.process_ns(name, attrlist) | |
| 63 attrlist = self.xmlnsattrs() + attrlist | |
| 64 self.gen.emitStartElement(name, attrlist, taldict, metaldict) | |
| 65 | |
| 66 def process_ns(self, name, attrlist): | |
| 67 taldict = {} | |
| 68 metaldict = {} | |
| 69 fixedattrlist = [] | |
| 70 name, namebase, namens = self.fixname(name) | |
| 71 for key, value in attrlist: | |
| 72 key, keybase, keyns = self.fixname(key) | |
| 73 ns = keyns or namens # default to tag namespace | |
| 74 item = key, value | |
| 75 if ns == 'metal': | |
| 76 metaldict[keybase] = value | |
| 77 item = item + ("metal",) | |
| 78 elif ns == 'tal': | |
| 79 taldict[keybase] = value | |
| 80 item = item + ("tal",) | |
| 81 fixedattrlist.append(item) | |
| 82 if namens in ('metal', 'tal'): | |
| 83 taldict['tal tag'] = namens | |
| 84 return name, fixedattrlist, taldict, metaldict | |
| 85 | |
| 86 def xmlnsattrs(self): | |
| 87 newlist = [] | |
| 88 for prefix, uri in self.nsNew: | |
| 89 if prefix: | |
| 90 key = "xmlns:" + prefix | |
| 91 else: | |
| 92 key = "xmlns" | |
| 93 if uri in (ZOPE_METAL_NS, ZOPE_TAL_NS): | |
| 94 item = (key, uri, "xmlns") | |
| 95 else: | |
| 96 item = (key, uri) | |
| 97 newlist.append(item) | |
| 98 self.nsNew = [] | |
| 99 return newlist | |
| 100 | |
| 101 def fixname(self, name): | |
| 102 if ' ' in name: | |
| 103 uri, name = string.split(name, ' ') | |
| 104 prefix = self.nsDict[uri] | |
| 105 prefixed = name | |
| 106 if prefix: | |
| 107 prefixed = "%s:%s" % (prefix, name) | |
| 108 ns = 'x' | |
| 109 if uri == ZOPE_TAL_NS: | |
| 110 ns = 'tal' | |
| 111 elif uri == ZOPE_METAL_NS: | |
| 112 ns = 'metal' | |
| 113 return (prefixed, name, ns) | |
| 114 return (name, name, None) | |
| 115 | |
| 116 def EndElementHandler(self, name): | |
| 117 name = self.fixname(name)[0] | |
| 118 self.gen.emitEndElement(name) | |
| 119 | |
| 120 def DefaultHandler(self, text): | |
| 121 self.gen.emitRawText(text) | |
| 122 | |
| 123 def test(): | |
| 124 import sys | |
| 125 p = TALParser() | |
| 126 file = "tests/input/test01.xml" | |
| 127 if sys.argv[1:]: | |
| 128 file = sys.argv[1] | |
| 129 p.parseFile(file) | |
| 130 program, macros = p.getCode() | |
| 131 from TALInterpreter import TALInterpreter | |
| 132 from DummyEngine import DummyEngine | |
| 133 engine = DummyEngine(macros) | |
| 134 TALInterpreter(program, macros, engine, sys.stdout, wrap=0)() | |
| 135 | |
| 136 if __name__ == "__main__": | |
| 137 test() |