Mercurial > p > roundup > code
comparison roundup/template_parser.py @ 931:3dba266f94d8
this oughta be better
| author | Richard Jones <richard@users.sourceforge.net> |
|---|---|
| date | Fri, 02 Aug 2002 04:43:53 +0000 |
| parents | |
| children | a43fa69c1b70 |
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| 930:3c344e942055 | 931:3dba266f94d8 |
|---|---|
| 1 import htmllib, formatter | |
| 2 | |
| 3 class Require: | |
| 4 ''' Encapsulates a parsed <require attributes>...[<else>...]</require> | |
| 5 ''' | |
| 6 def __init__(self, attributes): | |
| 7 self.attributes = attributes | |
| 8 self.current = self.ok = [] | |
| 9 self.fail = [] | |
| 10 def __len__(self): | |
| 11 return len(self.current) | |
| 12 def __getitem__(self, n): | |
| 13 return self.current[n] | |
| 14 def __setitem__(self, n, data): | |
| 15 self.current[n] = data | |
| 16 def append(self, data): | |
| 17 self.current.append(data) | |
| 18 def elseMode(self): | |
| 19 self.current = self.fail | |
| 20 | |
| 21 class Display: | |
| 22 ''' Encapsulates a parsed <display attributes> | |
| 23 ''' | |
| 24 def __init__(self, attributes): | |
| 25 self.attributes = attributes | |
| 26 | |
| 27 class Property: | |
| 28 ''' Encapsulates a parsed <property attributes> | |
| 29 ''' | |
| 30 def __init__(self, attributes): | |
| 31 self.attributes = attributes | |
| 32 | |
| 33 class RoundupTemplateParser(htmllib.HTMLParser): | |
| 34 ''' Parse Roundup's HTML template structure into a list of components: | |
| 35 | |
| 36 'string': this is just plain data to be displayed | |
| 37 Display : instances indicate that display functions are to be called | |
| 38 Require : if/else style check using the conditions in the attributes, | |
| 39 displaying the "ok" list of components or "fail" list | |
| 40 | |
| 41 ''' | |
| 42 def __init__(self): | |
| 43 htmllib.HTMLParser.__init__(self, formatter.NullFormatter()) | |
| 44 self.current = self.structure = [] | |
| 45 self.stack = [] | |
| 46 | |
| 47 def handle_data(self, data): | |
| 48 self.append_data(data) | |
| 49 | |
| 50 def append_data(self, data): | |
| 51 if self.current and isinstance(self.current[-1], type('')): | |
| 52 self.current[-1] = self.current[-1] + data | |
| 53 else: | |
| 54 self.current.append(data) | |
| 55 | |
| 56 def unknown_starttag(self, tag, attributes): | |
| 57 s = '' | |
| 58 s = s + '<%s' % tag | |
| 59 for name, value in attributes: | |
| 60 s = s + ' %s="%s"' % (name, value) | |
| 61 s = s + '>' | |
| 62 self.append_data(s) | |
| 63 | |
| 64 def handle_starttag(self, tag, method, attributes): | |
| 65 if tag in ('require', 'else', 'display', 'property'): | |
| 66 method(attributes) | |
| 67 else: | |
| 68 self.unknown_starttag(tag, attributes) | |
| 69 | |
| 70 def unknown_endtag(self, tag): | |
| 71 if tag == 'require': | |
| 72 self.current = self.stack.pop() | |
| 73 else: | |
| 74 self.append_data('</%s>'%tag) | |
| 75 | |
| 76 def handle_endtag(self, tag, method): | |
| 77 self.unknown_endtag(tag) | |
| 78 | |
| 79 def close(self): | |
| 80 htmllib.HTMLParser.close(self) | |
| 81 | |
| 82 def do_display(self, attributes): | |
| 83 self.current.append(Display(attributes)) | |
| 84 | |
| 85 def do_property(self, attributes): | |
| 86 self.current.append(Property(attributes)) | |
| 87 | |
| 88 def do_require(self, attributes): | |
| 89 r = Require(attributes) | |
| 90 self.current.append(r) | |
| 91 self.stack.append(self.current) | |
| 92 self.current = r | |
| 93 | |
| 94 def do_else(self, attributes): | |
| 95 self.current.elseMode() | |
| 96 | |
| 97 def display(structure, indent=''): | |
| 98 ''' Pretty-print the parsed structure for debugging | |
| 99 ''' | |
| 100 for entry in structure: | |
| 101 if isinstance(entry, type('')): | |
| 102 print "%s%r"%(indent, entry[:50]) | |
| 103 elif isinstance(entry, Require): | |
| 104 print '%sTEST: %r'%(indent, entry.attributes) | |
| 105 print '%sOK...'%indent | |
| 106 display(entry.ok, indent+' ') | |
| 107 if entry.fail: | |
| 108 print '%sFAIL...'%indent | |
| 109 display(entry.fail, indent+' ') | |
| 110 elif isinstance(entry, Display): | |
| 111 print '%sDISPLAY: %r'%(indent, entry.attributes) | |
| 112 | |
| 113 if __name__ == '__main__': | |
| 114 import sys | |
| 115 parser = RoundupTemplateParser() | |
| 116 parser.feed(open(sys.argv[1], 'r').read()) | |
| 117 display(parser.structure) | |
| 118 | |
| 119 # | |
| 120 # $Log: not supported by cvs2svn $ | |
| 121 # | |
| 122 # vim: set filetype=python ts=4 sw=4 et si | |
| 123 |