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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
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14 # Regular expressions used for parsing
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15
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16 interesting_normal = re.compile('[&<]')
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17 interesting_cdata = re.compile(r'<(/|\Z)')
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18 incomplete = re.compile('&[a-zA-Z#]')
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19
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20 entityref = re.compile('&([a-zA-Z][-.a-zA-Z0-9]*)[^a-zA-Z0-9]')
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21 charref = re.compile('&#(?:[0-9]+|[xX][0-9a-fA-F]+)[^0-9a-fA-F]')
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22
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23 starttagopen = re.compile('<[a-zA-Z]')
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24 piclose = re.compile('>')
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25 endtagopen = re.compile('</')
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26 commentclose = re.compile(r'--\s*>')
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27 tagfind = re.compile('[a-zA-Z][-.a-zA-Z0-9:_]*')
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28 attrfind = re.compile(
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29 r'\s*([a-zA-Z_][-.:a-zA-Z_0-9]*)(\s*=\s*'
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30 r'(\'[^\']*\'|"[^"]*"|[-a-zA-Z0-9./:;+*%?!&$\(\)_#=~]*))?')
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31
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32 locatestarttagend = re.compile(r"""
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33 <[a-zA-Z][-.a-zA-Z0-9:_]* # tag name
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34 (?:\s+ # whitespace before attribute name
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35 (?:[a-zA-Z_][-.:a-zA-Z0-9_]* # attribute name
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36 (?:\s*=\s* # value indicator
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37 (?:'[^']*' # LITA-enclosed value
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38 |\"[^\"]*\" # LIT-enclosed value
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39 |[^'\">\s]+ # bare value
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40 )
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41 )?
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42 )
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43 )*
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44 \s* # trailing whitespace
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45 """, re.VERBOSE)
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46 endendtag = re.compile('>')
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47 endtagfind = re.compile('</\s*([a-zA-Z][-.a-zA-Z0-9:_]*)\s*>')
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48
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49
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50 class HTMLParseError(Exception):
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51 """Exception raised for all parse errors."""
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52
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53 def __init__(self, msg, position=(None, None)):
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54 assert msg
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55 self.msg = msg
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56 self.lineno = position[0]
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57 self.offset = position[1]
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58
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59 def __str__(self):
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60 result = self.msg
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61 if self.lineno is not None:
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62 result = result + ", at line %d" % self.lineno
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63 if self.offset is not None:
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64 result = result + ", column %d" % (self.offset + 1)
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65 return result
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66
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67
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68 def _contains_at(s, sub, pos):
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69 return s[pos:pos+len(sub)] == sub
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70
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71
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72 class HTMLParser(markupbase.ParserBase):
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73 """Find tags and other markup and call handler functions.
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74
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75 Usage:
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76 p = HTMLParser()
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77 p.feed(data)
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78 ...
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79 p.close()
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80
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81 Start tags are handled by calling self.handle_starttag() or
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82 self.handle_startendtag(); end tags by self.handle_endtag(). The
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83 data between tags is passed from the parser to the derived class
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84 by calling self.handle_data() with the data as argument (the data
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85 may be split up in arbitrary chunks). Entity references are
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86 passed by calling self.handle_entityref() with the entity
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87 reference as the argument. Numeric character references are
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88 passed to self.handle_charref() with the string containing the
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89 reference as the argument.
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90 """
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91
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92 CDATA_CONTENT_ELEMENTS = ("script", "style")
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93
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94
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95 def __init__(self):
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96 """Initialize and reset this instance."""
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97 self.reset()
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98
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99 def reset(self):
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100 """Reset this instance. Loses all unprocessed data."""
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101 self.rawdata = ''
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102 self.stack = []
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103 self.lasttag = '???'
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104 self.interesting = interesting_normal
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105 markupbase.ParserBase.reset(self)
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106
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107 def feed(self, data):
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108 """Feed data to the parser.
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109
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110 Call this as often as you want, with as little or as much text
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111 as you want (may include '\n').
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112 """
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113 self.rawdata = self.rawdata + data
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114 self.goahead(0)
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115
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116 def close(self):
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117 """Handle any buffered data."""
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118 self.goahead(1)
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119
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120 def error(self, message):
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121 raise HTMLParseError(message, self.getpos())
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122
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123 __starttag_text = None
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124
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125 def get_starttag_text(self):
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126 """Return full source of start tag: '<...>'."""
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127 return self.__starttag_text
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128
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129 cdata_endtag = None
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130
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131 def set_cdata_mode(self, endtag=None):
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132 self.cdata_endtag = endtag
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133 self.interesting = interesting_cdata
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134
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135 def clear_cdata_mode(self):
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136 self.cdata_endtag = None
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137 self.interesting = interesting_normal
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138
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139 # Internal -- handle data as far as reasonable. May leave state
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140 # and data to be processed by a subsequent call. If 'end' is
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141 # true, force handling all data as if followed by EOF marker.
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142 def goahead(self, end):
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143 rawdata = self.rawdata
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144 i = 0
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145 n = len(rawdata)
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146 while i < n:
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147 match = self.interesting.search(rawdata, i) # < or &
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148 if match:
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149 j = match.start()
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150 else:
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151 j = n
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152 if i < j: self.handle_data(rawdata[i:j])
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153 i = self.updatepos(i, j)
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154 if i == n: break
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155 if rawdata[i] == '<':
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156 if starttagopen.match(rawdata, i): # < + letter
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157 k = self.parse_starttag(i)
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158 elif endtagopen.match(rawdata, i): # </
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159 k = self.parse_endtag(i)
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160 elif _contains_at(rawdata, "<!--", i): # <!--
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161 k = self.parse_comment(i)
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162 elif _contains_at(rawdata, "<!", i): # <!
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163 k = self.parse_declaration(i)
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164 elif _contains_at(rawdata, "<?", i): # <?
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165 k = self.parse_pi(i)
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166 elif _contains_at(rawdata, "<?", i): # <!
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167 k = self.parse_declaration(i)
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168 elif (i + 1) < n:
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169 self.handle_data("<")
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170 k = i + 1
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171 else:
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172 break
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173 if k < 0:
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174 if end:
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175 self.error("EOF in middle of construct")
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176 break
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177 i = self.updatepos(i, k)
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178 elif rawdata[i:i+2] == "&#":
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179 match = charref.match(rawdata, i)
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180 if match:
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181 name = match.group()[2:-1]
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182 self.handle_charref(name)
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183 k = match.end()
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184 if rawdata[k-1] != ';':
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185 k = k - 1
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186 i = self.updatepos(i, k)
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187 continue
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188 else:
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parents:
diff
changeset
|
189 break
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
190 elif rawdata[i] == '&':
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
191 match = entityref.match(rawdata, i)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
192 if match:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
193 name = match.group(1)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
194 self.handle_entityref(name)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
195 k = match.end()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
196 if rawdata[k-1] != ';':
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
197 k = k - 1
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
198 i = self.updatepos(i, k)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
199 continue
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
200 match = incomplete.match(rawdata, i)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
201 if match:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
202 # match.group() will contain at least 2 chars
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
203 rest = rawdata[i:]
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
204 if end and match.group() == rest:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
205 self.error("EOF in middle of entity or char ref")
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
206 # incomplete
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
207 break
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
208 elif (i + 1) < n:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
209 # not the end of the buffer, and can't be confused
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
210 # with some other construct
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
211 self.handle_data("&")
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
212 i = self.updatepos(i, i + 1)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
213 else:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
214 break
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
215 else:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
216 assert 0, "interesting.search() lied"
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
217 # end while
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
218 if end and i < n:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
219 self.handle_data(rawdata[i:n])
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
220 i = self.updatepos(i, n)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
221 self.rawdata = rawdata[i:]
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
222
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
223 # Internal -- parse comment, return end or -1 if not terminated
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
224 def parse_comment(self, i, report=1):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
225 rawdata = self.rawdata
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
226 assert rawdata[i:i+4] == '<!--', 'unexpected call to parse_comment()'
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
227 match = commentclose.search(rawdata, i+4)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
228 if not match:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
229 return -1
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
230 if report:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
231 j = match.start()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
232 self.handle_comment(rawdata[i+4: j])
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
233 j = match.end()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
234 return j
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
235
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
236 # Internal -- parse processing instr, return end or -1 if not terminated
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
237 def parse_pi(self, i):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
238 rawdata = self.rawdata
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
239 assert rawdata[i:i+2] == '<?', 'unexpected call to parse_pi()'
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
240 match = piclose.search(rawdata, i+2) # >
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
241 if not match:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
242 return -1
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
243 j = match.start()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
244 self.handle_pi(rawdata[i+2: j])
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
245 j = match.end()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
246 return j
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
247
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
248 # Internal -- handle starttag, return end or -1 if not terminated
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
249 def parse_starttag(self, i):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
250 self.__starttag_text = None
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
251 endpos = self.check_for_whole_start_tag(i)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
252 if endpos < 0:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
253 return endpos
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
254 rawdata = self.rawdata
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
255 self.__starttag_text = rawdata[i:endpos]
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
256
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
257 # Now parse the data between i+1 and j into a tag and attrs
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
258 attrs = []
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
259 match = tagfind.match(rawdata, i+1)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
260 assert match, 'unexpected call to parse_starttag()'
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
261 k = match.end()
|
|
2348
|
262 self.lasttag = tag = rawdata[i+1:k].lower()
|
1049
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
263
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
264 while k < endpos:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
265 m = attrfind.match(rawdata, k)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
266 if not m:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
267 break
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
268 attrname, rest, attrvalue = m.group(1, 2, 3)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
269 if not rest:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
270 attrvalue = None
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
271 elif attrvalue[:1] == '\'' == attrvalue[-1:] or \
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
272 attrvalue[:1] == '"' == attrvalue[-1:]:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
273 attrvalue = attrvalue[1:-1]
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
274 attrvalue = self.unescape(attrvalue)
|
|
2348
|
275 attrs.append((attrname.lower(), attrvalue))
|
1049
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
276 k = m.end()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
277
|
|
2348
|
278 end = rawdata[k:endpos].strip()
|
1049
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
279 if end not in (">", "/>"):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
280 lineno, offset = self.getpos()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
281 if "\n" in self.__starttag_text:
|
|
2348
|
282 lineno = lineno + self.__starttag_text.count("\n")
|
1049
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
283 offset = len(self.__starttag_text) \
|
|
2348
|
284 - self.__starttag_text.rfind("\n")
|
1049
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
285 else:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
286 offset = offset + len(self.__starttag_text)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
287 self.error("junk characters in start tag: %s"
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
288 % `rawdata[k:endpos][:20]`)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
289 if end[-2:] == '/>':
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
290 # XHTML-style empty tag: <span attr="value" />
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
291 self.handle_startendtag(tag, attrs)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
292 else:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
293 self.handle_starttag(tag, attrs)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
294 if tag in self.CDATA_CONTENT_ELEMENTS:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
295 self.set_cdata_mode(tag)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
296 return endpos
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
297
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
298 # Internal -- check to see if we have a complete starttag; return end
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
299 # or -1 if incomplete.
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
300 def check_for_whole_start_tag(self, i):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
301 rawdata = self.rawdata
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
302 m = locatestarttagend.match(rawdata, i)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
303 if m:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
304 j = m.end()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
305 next = rawdata[j:j+1]
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
306 if next == ">":
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
307 return j + 1
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
308 if next == "/":
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
309 s = rawdata[j:j+2]
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
310 if s == "/>":
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
311 return j + 2
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
312 if s == "/":
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
313 # buffer boundary
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
314 return -1
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
315 # else bogus input
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
316 self.updatepos(i, j + 1)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
317 self.error("malformed empty start tag")
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
318 if next == "":
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
319 # end of input
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
320 return -1
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
321 if next in ("abcdefghijklmnopqrstuvwxyz=/"
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
322 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
323 # end of input in or before attribute value, or we have the
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
324 # '/' from a '/>' ending
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
325 return -1
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
326 self.updatepos(i, j)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
327 self.error("malformed start tag")
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
328 raise AssertionError("we should not get here!")
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
329
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
330 # Internal -- parse endtag, return end or -1 if incomplete
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
331 def parse_endtag(self, i):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
332 rawdata = self.rawdata
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
333 assert rawdata[i:i+2] == "</", "unexpected call to parse_endtag"
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
334 match = endendtag.search(rawdata, i+1) # >
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
335 if not match:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
336 return -1
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
337 j = match.end()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
338 match = endtagfind.match(rawdata, i) # </ + tag + >
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
339 if not match:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
340 self.error("bad end tag: %s" % `rawdata[i:j]`)
|
|
2348
|
341 tag = match.group(1).lower()
|
1049
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
342 if ( self.cdata_endtag is not None
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
343 and tag != self.cdata_endtag):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
344 # Should be a mismatched end tag, but we'll treat it
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
345 # as text anyway, since most HTML authors aren't
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
346 # interested in the finer points of syntax.
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
347 self.handle_data(match.group(0))
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
348 else:
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
349 self.handle_endtag(tag)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
350 self.clear_cdata_mode()
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
351 return j
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
352
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
353 # Overridable -- finish processing of start+end tag: <tag.../>
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
354 def handle_startendtag(self, tag, attrs):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
355 self.handle_starttag(tag, attrs)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
356 self.handle_endtag(tag)
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
357
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
358 # Overridable -- handle start tag
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
359 def handle_starttag(self, tag, attrs):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
360 pass
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
361
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
362 # Overridable -- handle end tag
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
363 def handle_endtag(self, tag):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
364 pass
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
365
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
366 # Overridable -- handle character reference
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
367 def handle_charref(self, name):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
368 pass
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
369
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
370 # Overridable -- handle entity reference
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
371 def handle_entityref(self, name):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
372 pass
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
373
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
374 # Overridable -- handle data
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
375 def handle_data(self, data):
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
376 pass
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
377
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
378 # Overridable -- handle comment
|
Richard Jones <richard@users.sourceforge.net>
parents:
diff
changeset
|
379 def handle_comment(self, data):
|
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380 pass
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Richard Jones <richard@users.sourceforge.net>
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381
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382 # Overridable -- handle declaration
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383 def handle_decl(self, decl):
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384 pass
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Richard Jones <richard@users.sourceforge.net>
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385
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Richard Jones <richard@users.sourceforge.net>
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386 # Overridable -- handle processing instruction
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387 def handle_pi(self, data):
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388 pass
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Richard Jones <richard@users.sourceforge.net>
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389
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Richard Jones <richard@users.sourceforge.net>
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390 def unknown_decl(self, data):
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391 self.error("unknown declaration: " + `data`)
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392
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393 # Internal -- helper to remove special character quoting
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394 def unescape(self, s):
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395 if '&' not in s:
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396 return s
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2348
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397 s = s.replace("<", "<")
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398 s = s.replace(">", ">")
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399 s = s.replace("'", "'")
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400 s = s.replace(""", '"')
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401 s = s.replace("&", "&") # Must be last
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402 return s
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