Mercurial > p > roundup > code
annotate roundup/cgi/TAL/TALDefs.py @ 4117:4d1fa6e1fe8c 1.4.8
release stuff
| author | Richard Jones <richard@users.sourceforge.net> |
|---|---|
| date | Wed, 18 Mar 2009 03:39:58 +0000 |
| parents | 8c2402a78bb0 |
| children | 63868084b8bb |
| rev | line source |
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| 1049 | 1 ############################################################################## |
| 2 # | |
| 3 # Copyright (c) 2001, 2002 Zope Corporation and Contributors. | |
| 4 # All Rights Reserved. | |
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5 # |
| 1049 | 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 | |
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11 # FOR A PARTICULAR PURPOSE. |
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12 # |
| 1049 | 13 ############################################################################## |
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14 # Modifications for Roundup: |
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15 # 1. commented out ITALES references |
| 1049 | 16 """ |
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17 Common definitions used by TAL and METAL compilation an transformation. |
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18 """ |
| 1049 | 19 |
| 20 from types import ListType, TupleType | |
| 21 | |
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22 #from ITALES import ITALESErrorInfo |
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23 |
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24 TAL_VERSION = "1.4" |
| 1049 | 25 |
| 26 XML_NS = "http://www.w3.org/XML/1998/namespace" # URI for XML namespace | |
| 27 XMLNS_NS = "http://www.w3.org/2000/xmlns/" # URI for XML NS declarations | |
| 28 | |
| 29 ZOPE_TAL_NS = "http://xml.zope.org/namespaces/tal" | |
| 30 ZOPE_METAL_NS = "http://xml.zope.org/namespaces/metal" | |
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31 ZOPE_I18N_NS = "http://xml.zope.org/namespaces/i18n" |
| 1049 | 32 |
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33 # This RE must exactly match the expression of the same name in the |
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34 # zope.i18n.simpletranslationservice module: |
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35 NAME_RE = "[a-zA-Z_][-a-zA-Z0-9_]*" |
| 1049 | 36 |
| 37 KNOWN_METAL_ATTRIBUTES = [ | |
| 38 "define-macro", | |
| 39 "use-macro", | |
| 40 "define-slot", | |
| 41 "fill-slot", | |
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42 "slot", |
| 1049 | 43 ] |
| 44 | |
| 45 KNOWN_TAL_ATTRIBUTES = [ | |
| 46 "define", | |
| 47 "condition", | |
| 48 "content", | |
| 49 "replace", | |
| 50 "repeat", | |
| 51 "attributes", | |
| 52 "on-error", | |
| 53 "omit-tag", | |
| 54 "tal tag", | |
| 55 ] | |
| 56 | |
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57 KNOWN_I18N_ATTRIBUTES = [ |
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58 "translate", |
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59 "domain", |
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60 "target", |
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61 "source", |
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62 "attributes", |
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63 "data", |
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64 "name", |
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65 ] |
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66 |
| 1049 | 67 class TALError(Exception): |
| 68 | |
| 69 def __init__(self, msg, position=(None, None)): | |
| 70 assert msg != "" | |
| 71 self.msg = msg | |
| 72 self.lineno = position[0] | |
| 73 self.offset = position[1] | |
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74 self.filename = None |
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75 |
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76 def setFile(self, filename): |
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77 self.filename = filename |
| 1049 | 78 |
| 79 def __str__(self): | |
| 80 result = self.msg | |
| 81 if self.lineno is not None: | |
| 82 result = result + ", at line %d" % self.lineno | |
| 83 if self.offset is not None: | |
| 84 result = result + ", column %d" % (self.offset + 1) | |
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85 if self.filename is not None: |
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86 result = result + ', in file %s' % self.filename |
| 1049 | 87 return result |
| 88 | |
| 89 class METALError(TALError): | |
| 90 pass | |
| 91 | |
| 92 class TALESError(TALError): | |
| 93 pass | |
| 94 | |
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95 class I18NError(TALError): |
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96 pass |
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97 |
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98 |
| 1049 | 99 class ErrorInfo: |
| 100 | |
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101 #__implements__ = ITALESErrorInfo |
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102 |
| 1049 | 103 def __init__(self, err, position=(None, None)): |
| 104 if isinstance(err, Exception): | |
| 105 self.type = err.__class__ | |
| 106 self.value = err | |
| 107 else: | |
| 108 self.type = err | |
| 109 self.value = None | |
| 110 self.lineno = position[0] | |
| 111 self.offset = position[1] | |
| 112 | |
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113 |
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114 |
| 1049 | 115 import re |
| 116 _attr_re = re.compile(r"\s*([^\s]+)\s+([^\s].*)\Z", re.S) | |
| 117 _subst_re = re.compile(r"\s*(?:(text|structure)\s+)?(.*)\Z", re.S) | |
| 118 del re | |
| 119 | |
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120 def parseAttributeReplacements(arg, xml): |
| 1049 | 121 dict = {} |
| 122 for part in splitParts(arg): | |
| 123 m = _attr_re.match(part) | |
| 124 if not m: | |
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125 raise TALError("Bad syntax in attributes: " + `part`) |
| 1049 | 126 name, expr = m.group(1, 2) |
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127 if not xml: |
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128 name = name.lower() |
| 1049 | 129 if dict.has_key(name): |
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130 raise TALError("Duplicate attribute name in attributes: " + `part`) |
| 1049 | 131 dict[name] = expr |
| 132 return dict | |
| 133 | |
| 134 def parseSubstitution(arg, position=(None, None)): | |
| 135 m = _subst_re.match(arg) | |
| 136 if not m: | |
| 137 raise TALError("Bad syntax in substitution text: " + `arg`, position) | |
| 138 key, expr = m.group(1, 2) | |
| 139 if not key: | |
| 140 key = "text" | |
| 141 return key, expr | |
| 142 | |
| 143 def splitParts(arg): | |
| 144 # Break in pieces at undoubled semicolons and | |
| 145 # change double semicolons to singles: | |
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146 arg = arg.replace(";;", "\0") |
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147 parts = arg.split(';') |
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148 parts = [p.replace("\0", ";") for p in parts] |
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149 if len(parts) > 1 and not parts[-1].strip(): |
| 1049 | 150 del parts[-1] # It ended in a semicolon |
| 151 return parts | |
| 152 | |
| 153 def isCurrentVersion(program): | |
| 154 version = getProgramVersion(program) | |
| 155 return version == TAL_VERSION | |
| 156 | |
| 157 def getProgramMode(program): | |
| 158 version = getProgramVersion(program) | |
| 159 if (version == TAL_VERSION and isinstance(program[1], TupleType) and | |
| 160 len(program[1]) == 2): | |
| 161 opcode, mode = program[1] | |
| 162 if opcode == "mode": | |
| 163 return mode | |
| 164 return None | |
| 165 | |
| 166 def getProgramVersion(program): | |
| 167 if (len(program) >= 2 and | |
| 168 isinstance(program[0], TupleType) and len(program[0]) == 2): | |
| 169 opcode, version = program[0] | |
| 170 if opcode == "version": | |
| 171 return version | |
| 172 return None | |
| 173 | |
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174 import re |
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175 _ent1_re = re.compile('&(?![A-Z#])', re.I) |
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176 _entch_re = re.compile('&([A-Z][A-Z0-9]*)(?![A-Z0-9;])', re.I) |
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177 _entn1_re = re.compile('&#(?![0-9X])', re.I) |
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178 _entnx_re = re.compile('&(#X[A-F0-9]*)(?![A-F0-9;])', re.I) |
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179 _entnd_re = re.compile('&(#[0-9][0-9]*)(?![0-9;])') |
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180 del re |
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181 |
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182 def attrEscape(s): |
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183 """Replace special characters '&<>' by character entities, |
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184 except when '&' already begins a syntactically valid entity.""" |
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185 s = _ent1_re.sub('&', s) |
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186 s = _entch_re.sub(r'&\1', s) |
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187 s = _entn1_re.sub('&#', s) |
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188 s = _entnx_re.sub(r'&\1', s) |
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189 s = _entnd_re.sub(r'&\1', s) |
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190 s = s.replace('<', '<') |
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191 s = s.replace('>', '>') |
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192 s = s.replace('"', '"') |
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193 return s |