src/document/sgml/html/html.c

   1 /* SGML node handling */
   2 /* $Id: html.c,v 1.3 2004/12/20 00:08:07 jonas Exp $ */
   3
   4 #ifdef HAVE_CONFIG_H
   5 #include "config.h"
   6 #endif
   7
   8 #include <stdlib.h>
   9 #include <string.h>
  10
  11 #include "elinks.h"
  12
  13 #include "document/dom/navigator.h"
  14 #include "document/dom/node.h"
  15 #include "document/sgml/html/html.h"
  16 #include "document/sgml/parser.h"
  17 #include "document/sgml/scanner.h"
  18 #include "document/sgml/sgml.h"
  19 #include "util/error.h"
  20 #include "util/memory.h"
  21 #include "util/string.h"
  22
  23
  24 #define HTML_NODE_INFO(node, name, id)          SGML_NODE_INFO(HTML, node, name, id)
  25 #define HTML_NODE_INF2(node, name, str, id)     SGML_NODE_INF2(HTML, node, name, str, id)
  26 #undef VERSION
  27
  28 static struct sgml_node_info html_attributes[HTML_ATTRIBUTES] = {
  29         SGML_NODE_HEAD(HTML, ATTRIBUTE),
  30
  31 #include "document/sgml/html/attribute.inc"
  32 };
  33
  34 static struct sgml_node_info html_elements[HTML_ELEMENTS] = {
  35         SGML_NODE_HEAD(HTML, ELEMENT),
  36
  37 #include "document/sgml/html/element.inc"
  38 };
  39
  40
  41 static struct dom_node *
  42 add_html_element_end_node(struct dom_navigator *navigator, struct dom_node *node, void *data)
  43 {
  44         struct sgml_parser *parser = navigator->data;
  45         struct dom_node *parent;
  46         struct scanner_token *token;
  47
  48         assert(navigator && parser && node);
  49         assert(dom_navigator_has_parents(navigator));
  50
  51         /* Are we the actual node being popped? */
  52         if (node != get_dom_navigator_top(navigator)->node)
  53                 return NULL;
  54
  55         parent = get_dom_navigator_parent(navigator)->node;
  56         token  = get_scanner_token(&parser->scanner);
  57
  58         assertm(token, "No token found in callback");
  59         assertm(token->type == SGML_TOKEN_ELEMENT_END, "Bad token found in callback");
  60
  61         if (!token->length) return NULL;
  62
  63         return add_dom_element(parent, token->string, token->length);
  64 }
  65
  66 /* TODO: We need to handle ascending of <br> and "<p>text1<p>text2" using data
  67  * from sgml_node_info. */
  68 static struct dom_node *
  69 add_html_element_node(struct dom_navigator *navigator, struct dom_node *node, void *data)
  70 {
  71         struct sgml_parser *parser = navigator->data;
  72
  73         assert(navigator && node);
  74         assert(dom_navigator_has_parents(navigator));
  75
  76         /* TODO: Move to SGML parser main loop and disguise these element ends
  77          * in some internal processing instruction. */
  78         if (parser->flags & SGML_PARSER_ADD_ELEMENT_ENDS)
  79                 get_dom_navigator_top(navigator)->callback = add_html_element_end_node;
  80
  81         return node;
  82 }
  83
  84
  85 struct sgml_info sgml_html_info = {
  86         html_attributes,
  87         html_elements,
  88         {
  89                 /*                              */ NULL,
  90                 /* DOM_NODE_ELEMENT             */ add_html_element_node,
  91                 /* DOM_NODE_ATTRIBUTE           */ NULL,
  92                 /* DOM_NODE_TEXT                */ NULL,
  93                 /* DOM_NODE_CDATA_SECTION       */ NULL,
  94                 /* DOM_NODE_ENTITY_REFERENCE    */ NULL,
  95                 /* DOM_NODE_ENTITY              */ NULL,
  96                 /* DOM_NODE_PROC_INSTRUCTION    */ NULL,
  97                 /* DOM_NODE_COMMENT             */ NULL,
  98                 /* DOM_NODE_DOCUMENT            */ NULL,
  99                 /* DOM_NODE_DOCUMENT_TYPE       */ NULL,
 100                 /* DOM_NODE_DOCUMENT_FRAGMENT   */ NULL,
 101                 /* DOM_NODE_NOTATION            */ NULL,
 102         }
 103 };