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annotate roundup/template_parser.py @ 962:540fc5fb20d4

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Fix so it can do <display...> inside an attribute of another tag.
author Gordon B. McMillan <gmcm@users.sourceforge.net>
date Tue, 20 Aug 2002 14:24:19 +0000
parents fdcf16b444a9
children
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1 import htmllib, formatter
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2
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3 class Require:
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4 ''' Encapsulates a parsed <require attributes>...[<else>...]</require>
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5 '''
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6 def __init__(self, attributes):
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7 self.attributes = attributes
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8 self.current = self.ok = []
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9 self.fail = []
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10 def __len__(self):
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11 return len(self.current)
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12 def __getitem__(self, n):
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13 return self.current[n]
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14 def __setitem__(self, n, data):
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15 self.current[n] = data
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16 def append(self, data):
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17 self.current.append(data)
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18 def elseMode(self):
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19 self.current = self.fail
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20 def __repr__(self):
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21 return '<Require %r ok:%r fail:%r>'%(self.attributes, self.ok,
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22 self.fail)
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23
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24 class Display:
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25 ''' Encapsulates a parsed <display attributes>
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26 '''
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27 def __init__(self, attributes):
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28 self.attributes = attributes
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29 def __repr__(self):
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30 return '<Display %r>'%self.attributes
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31
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32 class Property:
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33 ''' Encapsulates a parsed <property attributes>
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34 '''
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35 def __init__(self, attributes):
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36 self.attributes = attributes
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37 self.current = self.ok = []
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38 def __len__(self):
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39 return len(self.current)
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40 def __getitem__(self, n):
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41 return self.current[n]
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42 def __setitem__(self, n, data):
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43 self.current[n] = data
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44 def append(self, data):
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45 self.current.append(data)
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46 def __repr__(self):
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47 return '<Property %r %r>'%(self.attributes, self.structure)
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48
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49 class RoundupTemplate(htmllib.HTMLParser):
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50 ''' Parse Roundup's HTML template structure into a list of components:
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51
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52 'string': this is just plain data to be displayed
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53 Display : instances indicate that display functions are to be called
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54 Require : if/else style check using the conditions in the attributes,
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55 displaying the "ok" list of components or "fail" list
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56
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57 '''
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58 def __init__(self):
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59 htmllib.HTMLParser.__init__(self, formatter.NullFormatter())
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60 self.current = self.structure = []
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61 self.stack = []
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62
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63 def handle_data(self, data):
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64 self.append_data(data)
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65
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66 def append_data(self, data):
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67 if self.current and isinstance(self.current[-1], type('')):
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68 self.current[-1] = self.current[-1] + data
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69 else:
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70 self.current.append(data)
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71
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72 def unknown_starttag(self, tag, attributes):
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73 self.append_data('<%s' % tag)
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74 closeit = 1
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75 for name, value in attributes:
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76 pos = value.find('<')
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77 if pos > -1:
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78 self.append_data(' %s="%s' % (name, value[:pos]))
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79 closeit = 0
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80 else:
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81 self.append_data(' %s="%s"' % (name, value))
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82 if closeit:
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83 self.append_data('>')
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84
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85 def handle_starttag(self, tag, method, attributes):
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86 if tag in ('require', 'else', 'display', 'property'):
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87 method(attributes)
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88 else:
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89 self.unknown_starttag(tag, attributes)
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90
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91 def unknown_endtag(self, tag):
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92 if tag in ('require','property'):
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93 self.current = self.stack.pop()
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94 else:
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95 self.append_data('</%s>'%tag)
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96
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97 def handle_endtag(self, tag, method):
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98 self.unknown_endtag(tag)
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99
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100 def close(self):
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101 htmllib.HTMLParser.close(self)
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102
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103 def do_display(self, attributes):
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104 self.current.append(Display(attributes))
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105
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106 def do_property(self, attributes):
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107 p = Property(attributes)
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108 self.current.append(p)
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109 self.stack.append(self.current)
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110 self.current = p
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111
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112 def do_require(self, attributes):
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113 r = Require(attributes)
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114 self.current.append(r)
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115 self.stack.append(self.current)
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116 self.current = r
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117
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118 def do_else(self, attributes):
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119 self.current.elseMode()
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120
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121 def __repr__(self):
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122 return '<RoundupTemplate %r>'%self.structure
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123
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124 def display(structure, indent=''):
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125 ''' Pretty-print the parsed structure for debugging
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126 '''
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127 l = []
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128 for entry in structure:
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129 if isinstance(entry, type('')):
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130 l.append("%s%s"%(indent, entry))
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131 elif isinstance(entry, Require):
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132 l.append('%sTEST: %r\n'%(indent, entry.attributes))
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133 l.append('%sOK...'%indent)
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134 l.append(display(entry.ok, indent+' '))
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135 if entry.fail:
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136 l.append('%sFAIL...'%indent)
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137 l.append(display(entry.fail, indent+' '))
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138 elif isinstance(entry, Display):
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139 l.append('%sDISPLAY: %r'%(indent, entry.attributes))
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140 elif isinstance(entry, Property):
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141 l.append('%sPROPERTY: %r'%(indent, entry.attributes))
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142 l.append(display(entry.ok, indent+' '))
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143 return ''.join(l)
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144
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145 if __name__ == '__main__':
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146 import sys
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147 parser = RoundupTemplate()
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148 parser.feed(open(sys.argv[1], 'r').read())
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149 print display(parser.structure)
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150
Roundup Issue Tracker: http://roundup-tracker.org/