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annotate roundup/cgi/TAL/TALDefs.py @ 2077:3e0961d6d44d

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Added the "actor" property. Metakit backend not done (still not confident I know how it's supposed to work ;) Currently it will come up as NULL in the RDBMS backends for older items. The *dbm backends will look up the journal. I hope to remedy the former before 0.7's release. Fixed a bunch of migration issues in the rdbms backends while I was at it (index changes for key prop changes) and simplified the class table update code for RDBMSes that have "alter table" in their command set (ie. not sqlite) ... migration from "version 1" to "version 2" still hasn't actually been tested yet though.
author Richard Jones <richard@users.sourceforge.net>
date Mon, 15 Mar 2004 05:50:20 +0000
parents fc52d57c6c3e
children 8c2402a78bb0
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1 ##############################################################################
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2 #
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3 # Copyright (c) 2001, 2002 Zope Corporation and Contributors.
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4 # All Rights Reserved.
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5 #
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6 # This software is subject to the provisions of the Zope Public License,
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7 # Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
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8 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
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9 # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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10 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
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11 # FOR A PARTICULAR PURPOSE
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12 #
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13 ##############################################################################
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14 """Common definitions used by TAL and METAL compilation an transformation.
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15 """
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16 __docformat__ = 'restructuredtext'
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17
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18 from types import ListType, TupleType
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19
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20 TAL_VERSION = "1.3.2"
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21
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22 XML_NS = "http://www.w3.org/XML/1998/namespace" # URI for XML namespace
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23 XMLNS_NS = "http://www.w3.org/2000/xmlns/" # URI for XML NS declarations
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24
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25 ZOPE_TAL_NS = "http://xml.zope.org/namespaces/tal"
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26 ZOPE_METAL_NS = "http://xml.zope.org/namespaces/metal"
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27
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28 NAME_RE = "[a-zA-Z_][a-zA-Z0-9_]*"
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29
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30 KNOWN_METAL_ATTRIBUTES = [
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31 "define-macro",
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32 "use-macro",
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33 "define-slot",
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34 "fill-slot",
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35 "slot"
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36 ]
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37
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38 KNOWN_TAL_ATTRIBUTES = [
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39 "define",
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40 "condition",
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41 "content",
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42 "replace",
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43 "repeat",
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44 "attributes",
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45 "on-error",
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46 "omit-tag",
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47 "tal tag",
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48 ]
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49
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50 class TALError(Exception):
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51
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52 def __init__(self, msg, position=(None, None)):
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53 assert msg != ""
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54 self.msg = msg
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55 self.lineno = position[0]
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56 self.offset = position[1]
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57
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58 def __str__(self):
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59 result = self.msg
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60 if self.lineno is not None:
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61 result = result + ", at line %d" % self.lineno
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62 if self.offset is not None:
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63 result = result + ", column %d" % (self.offset + 1)
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64 return result
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65
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66 class METALError(TALError):
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67 pass
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68
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69 class TALESError(TALError):
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70 pass
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71
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72 class ErrorInfo:
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73
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74 def __init__(self, err, position=(None, None)):
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75 if isinstance(err, Exception):
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76 self.type = err.__class__
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77 self.value = err
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78 else:
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79 self.type = err
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80 self.value = None
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81 self.lineno = position[0]
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82 self.offset = position[1]
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83
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84 import re
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85 _attr_re = re.compile(r"\s*([^\s]+)\s+([^\s].*)\Z", re.S)
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86 _subst_re = re.compile(r"\s*(?:(text|structure)\s+)?(.*)\Z", re.S)
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87 del re
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88
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89 def parseAttributeReplacements(arg):
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90 dict = {}
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91 for part in splitParts(arg):
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92 m = _attr_re.match(part)
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93 if not m:
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94 raise TALError("Bad syntax in attributes:" + `part`)
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95 name, expr = m.group(1, 2)
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96 if dict.has_key(name):
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97 raise TALError("Duplicate attribute name in attributes:" + `part`)
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98 dict[name] = expr
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99 return dict
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100
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101 def parseSubstitution(arg, position=(None, None)):
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102 m = _subst_re.match(arg)
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103 if not m:
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104 raise TALError("Bad syntax in substitution text: " + `arg`, position)
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105 key, expr = m.group(1, 2)
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106 if not key:
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107 key = "text"
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108 return key, expr
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109
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110 def splitParts(arg):
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111 # Break in pieces at undoubled semicolons and
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112 # change double semicolons to singles:
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113 import string
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114 arg = string.replace(arg, ";;", "\0")
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115 parts = string.split(arg, ';')
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116 parts = map(lambda s, repl=string.replace: repl(s, "\0", ";"), parts)
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117 if len(parts) > 1 and not string.strip(parts[-1]):
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118 del parts[-1] # It ended in a semicolon
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119 return parts
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120
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121 def isCurrentVersion(program):
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122 version = getProgramVersion(program)
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123 return version == TAL_VERSION
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124
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125 def getProgramMode(program):
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126 version = getProgramVersion(program)
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127 if (version == TAL_VERSION and isinstance(program[1], TupleType) and
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128 len(program[1]) == 2):
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129 opcode, mode = program[1]
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130 if opcode == "mode":
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131 return mode
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132 return None
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133
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134 def getProgramVersion(program):
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135 if (len(program) >= 2 and
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136 isinstance(program[0], TupleType) and len(program[0]) == 2):
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137 opcode, version = program[0]
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138 if opcode == "version":
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139 return version
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140 return None
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141
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142 import cgi
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143 def quote(s, escape=cgi.escape):
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144 return '"%s"' % escape(s, 1)
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145 del cgi
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