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1 """A parser for HTML and XHTML."""
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2
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3 # This file is based on sgmllib.py, but the API is slightly different.
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4
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5 # XXX There should be a way to distinguish between PCDATA (parsed
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6 # character data -- the normal case), RCDATA (replaceable character
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7 # data -- only char and entity references and end tags are special)
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8 # and CDATA (character data -- only end tags are special).
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9
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10
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11 import markupbase
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12 import re
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13 import string
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14
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15 # Regular expressions used for parsing
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16
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17 interesting_normal = re.compile('[&<]')
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18 interesting_cdata = re.compile(r'<(/|\Z)')
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19 incomplete = re.compile('&[a-zA-Z#]')
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20
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21 entityref = re.compile('&([a-zA-Z][-.a-zA-Z0-9]*)[^a-zA-Z0-9]')
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22 charref = re.compile('&#(?:[0-9]+|[xX][0-9a-fA-F]+)[^0-9a-fA-F]')
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23
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24 starttagopen = re.compile('<[a-zA-Z]')
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25 piclose = re.compile('>')
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26 endtagopen = re.compile('</')
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27 commentclose = re.compile(r'--\s*>')
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28 tagfind = re.compile('[a-zA-Z][-.a-zA-Z0-9:_]*')
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29 attrfind = re.compile(
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30 r'\s*([a-zA-Z_][-.:a-zA-Z_0-9]*)(\s*=\s*'
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31 r'(\'[^\']*\'|"[^"]*"|[-a-zA-Z0-9./:;+*%?!&$\(\)_#=~]*))?')
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32
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33 locatestarttagend = re.compile(r"""
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34 <[a-zA-Z][-.a-zA-Z0-9:_]* # tag name
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35 (?:\s+ # whitespace before attribute name
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36 (?:[a-zA-Z_][-.:a-zA-Z0-9_]* # attribute name
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37 (?:\s*=\s* # value indicator
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38 (?:'[^']*' # LITA-enclosed value
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39 |\"[^\"]*\" # LIT-enclosed value
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40 |[^'\">\s]+ # bare value
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41 )
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42 )?
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43 )
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44 )*
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45 \s* # trailing whitespace
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46 """, re.VERBOSE)
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47 endendtag = re.compile('>')
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48 endtagfind = re.compile('</\s*([a-zA-Z][-.a-zA-Z0-9:_]*)\s*>')
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49
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50
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51 class HTMLParseError(Exception):
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52 """Exception raised for all parse errors."""
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53
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54 def __init__(self, msg, position=(None, None)):
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55 assert msg
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56 self.msg = msg
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57 self.lineno = position[0]
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58 self.offset = position[1]
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59
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60 def __str__(self):
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61 result = self.msg
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62 if self.lineno is not None:
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63 result = result + ", at line %d" % self.lineno
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64 if self.offset is not None:
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65 result = result + ", column %d" % (self.offset + 1)
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66 return result
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67
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68
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69 def _contains_at(s, sub, pos):
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70 return s[pos:pos+len(sub)] == sub
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71
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72
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73 class HTMLParser(markupbase.ParserBase):
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74 """Find tags and other markup and call handler functions.
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75
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76 Usage:
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77 p = HTMLParser()
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78 p.feed(data)
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79 ...
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80 p.close()
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81
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82 Start tags are handled by calling self.handle_starttag() or
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83 self.handle_startendtag(); end tags by self.handle_endtag(). The
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84 data between tags is passed from the parser to the derived class
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85 by calling self.handle_data() with the data as argument (the data
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86 may be split up in arbitrary chunks). Entity references are
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87 passed by calling self.handle_entityref() with the entity
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88 reference as the argument. Numeric character references are
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89 passed to self.handle_charref() with the string containing the
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90 reference as the argument.
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91 """
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92
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93 CDATA_CONTENT_ELEMENTS = ("script", "style")
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94
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95
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96 def __init__(self):
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97 """Initialize and reset this instance."""
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98 self.reset()
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99
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100 def reset(self):
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101 """Reset this instance. Loses all unprocessed data."""
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102 self.rawdata = ''
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103 self.stack = []
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104 self.lasttag = '???'
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105 self.interesting = interesting_normal
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106 markupbase.ParserBase.reset(self)
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107
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108 def feed(self, data):
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109 """Feed data to the parser.
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110
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111 Call this as often as you want, with as little or as much text
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112 as you want (may include '\n').
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113 """
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114 self.rawdata = self.rawdata + data
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115 self.goahead(0)
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116
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117 def close(self):
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118 """Handle any buffered data."""
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119 self.goahead(1)
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120
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121 def error(self, message):
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122 raise HTMLParseError(message, self.getpos())
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123
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124 __starttag_text = None
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125
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126 def get_starttag_text(self):
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127 """Return full source of start tag: '<...>'."""
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128 return self.__starttag_text
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129
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130 cdata_endtag = None
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131
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132 def set_cdata_mode(self, endtag=None):
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133 self.cdata_endtag = endtag
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134 self.interesting = interesting_cdata
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135
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136 def clear_cdata_mode(self):
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137 self.cdata_endtag = None
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138 self.interesting = interesting_normal
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139
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140 # Internal -- handle data as far as reasonable. May leave state
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141 # and data to be processed by a subsequent call. If 'end' is
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142 # true, force handling all data as if followed by EOF marker.
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143 def goahead(self, end):
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144 rawdata = self.rawdata
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145 i = 0
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146 n = len(rawdata)
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147 while i < n:
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148 match = self.interesting.search(rawdata, i) # < or &
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149 if match:
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150 j = match.start()
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151 else:
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152 j = n
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153 if i < j: self.handle_data(rawdata[i:j])
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154 i = self.updatepos(i, j)
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155 if i == n: break
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156 if rawdata[i] == '<':
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157 if starttagopen.match(rawdata, i): # < + letter
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158 k = self.parse_starttag(i)
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159 elif endtagopen.match(rawdata, i): # </
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160 k = self.parse_endtag(i)
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161 elif _contains_at(rawdata, "<!--", i): # <!--
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162 k = self.parse_comment(i)
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163 elif _contains_at(rawdata, "<!", i): # <!
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164 k = self.parse_declaration(i)
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165 elif _contains_at(rawdata, "<?", i): # <?
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166 k = self.parse_pi(i)
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167 elif _contains_at(rawdata, "<?", i): # <!
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168 k = self.parse_declaration(i)
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169 elif (i + 1) < n:
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170 self.handle_data("<")
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171 k = i + 1
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172 else:
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173 break
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174 if k < 0:
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175 if end:
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176 self.error("EOF in middle of construct")
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177 break
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178 i = self.updatepos(i, k)
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179 elif rawdata[i:i+2] == "&#":
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180 match = charref.match(rawdata, i)
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181 if match:
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182 name = match.group()[2:-1]
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183 self.handle_charref(name)
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184 k = match.end()
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185 if rawdata[k-1] != ';':
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186 k = k - 1
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187 i = self.updatepos(i, k)
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188 continue
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parents:
diff
changeset
|
189 else:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
190 break
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
191 elif rawdata[i] == '&':
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
192 match = entityref.match(rawdata, i)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
193 if match:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
194 name = match.group(1)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
195 self.handle_entityref(name)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
196 k = match.end()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
197 if rawdata[k-1] != ';':
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
198 k = k - 1
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
199 i = self.updatepos(i, k)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
200 continue
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
201 match = incomplete.match(rawdata, i)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
202 if match:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
203 # match.group() will contain at least 2 chars
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
204 rest = rawdata[i:]
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
205 if end and match.group() == rest:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
206 self.error("EOF in middle of entity or char ref")
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
207 # incomplete
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
208 break
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
209 elif (i + 1) < n:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
210 # not the end of the buffer, and can't be confused
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
211 # with some other construct
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
212 self.handle_data("&")
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
213 i = self.updatepos(i, i + 1)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
214 else:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
215 break
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
216 else:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
217 assert 0, "interesting.search() lied"
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
218 # end while
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
219 if end and i < n:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
220 self.handle_data(rawdata[i:n])
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
221 i = self.updatepos(i, n)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
222 self.rawdata = rawdata[i:]
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
223
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
224 # Internal -- parse comment, return end or -1 if not terminated
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
225 def parse_comment(self, i, report=1):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
226 rawdata = self.rawdata
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
227 assert rawdata[i:i+4] == '<!--', 'unexpected call to parse_comment()'
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
228 match = commentclose.search(rawdata, i+4)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
229 if not match:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
230 return -1
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
231 if report:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
232 j = match.start()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
233 self.handle_comment(rawdata[i+4: j])
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
234 j = match.end()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
235 return j
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
236
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
237 # Internal -- parse processing instr, return end or -1 if not terminated
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
238 def parse_pi(self, i):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
239 rawdata = self.rawdata
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
240 assert rawdata[i:i+2] == '<?', 'unexpected call to parse_pi()'
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
241 match = piclose.search(rawdata, i+2) # >
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
242 if not match:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
243 return -1
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
244 j = match.start()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
245 self.handle_pi(rawdata[i+2: j])
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
246 j = match.end()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
247 return j
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
248
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
249 # Internal -- handle starttag, return end or -1 if not terminated
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
250 def parse_starttag(self, i):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
251 self.__starttag_text = None
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
252 endpos = self.check_for_whole_start_tag(i)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
253 if endpos < 0:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
254 return endpos
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
255 rawdata = self.rawdata
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
256 self.__starttag_text = rawdata[i:endpos]
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
257
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
258 # Now parse the data between i+1 and j into a tag and attrs
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
259 attrs = []
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
260 match = tagfind.match(rawdata, i+1)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
261 assert match, 'unexpected call to parse_starttag()'
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
262 k = match.end()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
263 self.lasttag = tag = string.lower(rawdata[i+1:k])
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
264
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
265 while k < endpos:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
266 m = attrfind.match(rawdata, k)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
267 if not m:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
268 break
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
269 attrname, rest, attrvalue = m.group(1, 2, 3)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
270 if not rest:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
271 attrvalue = None
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
272 elif attrvalue[:1] == '\'' == attrvalue[-1:] or \
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
273 attrvalue[:1] == '"' == attrvalue[-1:]:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
274 attrvalue = attrvalue[1:-1]
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
275 attrvalue = self.unescape(attrvalue)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
276 attrs.append((string.lower(attrname), attrvalue))
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
277 k = m.end()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
278
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
279 end = string.strip(rawdata[k:endpos])
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
280 if end not in (">", "/>"):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
281 lineno, offset = self.getpos()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
282 if "\n" in self.__starttag_text:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
283 lineno = lineno + string.count(self.__starttag_text, "\n")
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
284 offset = len(self.__starttag_text) \
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
285 - string.rfind(self.__starttag_text, "\n")
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
286 else:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
287 offset = offset + len(self.__starttag_text)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
288 self.error("junk characters in start tag: %s"
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
289 % `rawdata[k:endpos][:20]`)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
290 if end[-2:] == '/>':
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
291 # XHTML-style empty tag: <span attr="value" />
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
292 self.handle_startendtag(tag, attrs)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
293 else:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
294 self.handle_starttag(tag, attrs)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
295 if tag in self.CDATA_CONTENT_ELEMENTS:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
296 self.set_cdata_mode(tag)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
297 return endpos
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
298
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
299 # Internal -- check to see if we have a complete starttag; return end
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
300 # or -1 if incomplete.
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
301 def check_for_whole_start_tag(self, i):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
302 rawdata = self.rawdata
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
303 m = locatestarttagend.match(rawdata, i)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
304 if m:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
305 j = m.end()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
306 next = rawdata[j:j+1]
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
307 if next == ">":
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
308 return j + 1
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
309 if next == "/":
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
310 s = rawdata[j:j+2]
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
311 if s == "/>":
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
312 return j + 2
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
313 if s == "/":
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
314 # buffer boundary
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
315 return -1
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
316 # else bogus input
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
317 self.updatepos(i, j + 1)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
318 self.error("malformed empty start tag")
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
319 if next == "":
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
320 # end of input
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
321 return -1
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
322 if next in ("abcdefghijklmnopqrstuvwxyz=/"
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
323 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
324 # end of input in or before attribute value, or we have the
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
325 # '/' from a '/>' ending
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
326 return -1
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
327 self.updatepos(i, j)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
328 self.error("malformed start tag")
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
329 raise AssertionError("we should not get here!")
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
330
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
331 # Internal -- parse endtag, return end or -1 if incomplete
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
332 def parse_endtag(self, i):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
333 rawdata = self.rawdata
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
334 assert rawdata[i:i+2] == "</", "unexpected call to parse_endtag"
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
335 match = endendtag.search(rawdata, i+1) # >
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
336 if not match:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
337 return -1
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
338 j = match.end()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
339 match = endtagfind.match(rawdata, i) # </ + tag + >
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
340 if not match:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
341 self.error("bad end tag: %s" % `rawdata[i:j]`)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
342 tag = string.lower(match.group(1))
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
343 if ( self.cdata_endtag is not None
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
344 and tag != self.cdata_endtag):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
345 # Should be a mismatched end tag, but we'll treat it
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
346 # as text anyway, since most HTML authors aren't
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
347 # interested in the finer points of syntax.
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
348 self.handle_data(match.group(0))
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
349 else:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
350 self.handle_endtag(tag)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
351 self.clear_cdata_mode()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
352 return j
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
353
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
354 # Overridable -- finish processing of start+end tag: <tag.../>
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
355 def handle_startendtag(self, tag, attrs):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
356 self.handle_starttag(tag, attrs)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
357 self.handle_endtag(tag)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
358
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
359 # Overridable -- handle start tag
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
360 def handle_starttag(self, tag, attrs):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
361 pass
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
362
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
363 # Overridable -- handle end tag
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
364 def handle_endtag(self, tag):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
365 pass
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
366
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
367 # Overridable -- handle character reference
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
368 def handle_charref(self, name):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
369 pass
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
370
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
371 # Overridable -- handle entity reference
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
372 def handle_entityref(self, name):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
373 pass
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
374
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
375 # Overridable -- handle data
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
376 def handle_data(self, data):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
377 pass
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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378
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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379 # Overridable -- handle comment
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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380 def handle_comment(self, data):
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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381 pass
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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382
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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383 # Overridable -- handle declaration
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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384 def handle_decl(self, decl):
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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385 pass
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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386
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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387 # Overridable -- handle processing instruction
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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388 def handle_pi(self, data):
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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389 pass
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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390
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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391 def unknown_decl(self, data):
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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392 self.error("unknown declaration: " + `data`)
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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393
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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394 # Internal -- helper to remove special character quoting
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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395 def unescape(self, s):
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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396 if '&' not in s:
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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397 return s
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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398 s = string.replace(s, "<", "<")
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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399 s = string.replace(s, ">", ">")
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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400 s = string.replace(s, "'", "'")
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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401 s = string.replace(s, """, '"')
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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402 s = string.replace(s, "&", "&") # Must be last
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Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
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403 return s
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