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62 lines
2.4 KiB
Plaintext
62 lines
2.4 KiB
Plaintext
SGML DOM tree loader
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TODO items:
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- Check if the (HTML) DOM tree has a <base href="<base-uri>"> element that
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should be honoured.
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- Handle optional end tags.
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- The parser and scanner needs to know about the various data concepts of SGML
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like CDATA. It could be the start of DOCTYPE definitions. A generic way to
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create SGML parsers. One obvious place where CDATA would be useful is needed
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is for <script>#text</script> skipping which currently will generate elements
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for [ '<' <ident> ] sequences.
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[Excepts from a mail from Apr 18 15:11 2004 to Witold Filipczyk]
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-------------------------------------------------------------------------------
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> AFAIK when <p> is not closed current code doesn't handle such situation. I'm
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> thinking about function "close_tag" which automagically "closes" tags.
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The problem with closing tags is to figure out if the end tag is optional. This
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information is already available in the sgml_node_info structure via the
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SGML_ELEMENT_END_OPTIONAL flag and the sgml_node_info is then part of the
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sgml_parser_state structure that is available in the dom_navigator_state's data
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member.
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When initializating the dom navigator it get's passed an object size which it
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uses for allocating this kind of private data.
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If you look at add_sgml_element() you will see that it does:
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struct dom_navigator_state *state;
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struct sgml_parser_state *pstate;
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state = get_dom_navigator_top(navigator);
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assert(node == state->node && state->data);
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pstate = state->data;
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pstate->info = get_sgml_node_info(parser->info->elements, node);
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node->data.element.type = pstate->info->type;
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Meaning it sets up the sgml_parser state.
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Only problem is that I haven't had time to write patches so that the parser
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actually uses the state info. It is available as:
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struct sgml_parser_state *pstate = get_dom_navigator_top(navigator)->data;
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and then when another element should be generated we just have to check if the
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top requires an end tag meaning
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if (pstate->info->flags & SGML_ELEMENT_END_OPTIONAL)
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in which case we need to pop_dom_node(navigator) ..
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It sounds easy dunno if I have forgotten something. Atleast that is a start and
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we could maybe do more clever things. But my goal is to make the parser handle
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fairly clean tag soup well. Later we can maybe put in some hooks to improve
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really bad tag soup.
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-------------------------------------------------------------------------------
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