aniani/elinks
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Make URL inside cdata, comment and text nodes accessible

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It depends on existence of <regex.h> system header and that can be enabled
via document.plain.display_links. The URL regex was supplied by yanek.
This commit is contained in:
Jonas Fonseca 2005-12-25 15:16:21 +01:00 committed by Jonas Fonseca
parent dda6064b47
commit 4fa0937ca5
1 changed files with 74 additions and 2 deletions
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76
src/document/dom/renderer.c
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@ -4,6 +4,10 @@
#include "config.h"
#endif
#include <sys/types.h> /* FreeBSD needs this before regex.h */
#ifdef HAVE_REGEX_H
#include <regex.h>
#endif
#include <string.h>
#include "elinks.h"
@ -45,9 +49,15 @@ struct dom_renderer {
unsigned char *position;
int canvas_x, canvas_y;
#ifdef HAVE_REGEX_H
regex_t url_regex;
unsigned int find_url:1;
#endif
struct screen_char styles[DOM_NODES];
};
#define URL_REGEX "(ftp|http)://[[:alnum:]]+([-_\\.]?[[:alnum:]])*\\.[[:alpha:]]{2,4}(\\/{1}[-_~&=;\\?\\.a-z0-9]*)*"
#define URL_REGFLAGS (REG_ICASE | REG_EXTENDED)
static void
init_template(struct screen_char *template, struct document_options *options,
@ -91,6 +101,16 @@ init_dom_renderer(struct dom_renderer *renderer, struct document *document,
renderer->end = buffer->source + buffer->length;
renderer->position = renderer->source;
#ifdef HAVE_REGEX_H
if (renderer->document->options.plain_display_links) {
if (regcomp(&renderer->url_regex, URL_REGEX, URL_REGFLAGS)) {
regfree(&renderer->url_regex);
} else {
renderer->find_url = 1;
}
}
#endif
for (type = 0; type < DOM_NODES; type++) {
struct screen_char *template = &renderer->styles[type];
color_T background = document->options.default_bg;
@ -401,6 +421,46 @@ render_dom_node_text(struct dom_renderer *renderer, struct screen_char *template
render_dom_text(renderer, template, string, length);
}
#ifdef HAVE_REGEX_H
static inline void
render_dom_node_enhanced_text(struct dom_renderer *renderer, struct dom_node *node)
{
regex_t *regex = &renderer->url_regex;
regmatch_t regmatch;
unsigned char *string = node->string.string;
int length = node->string.length;
struct screen_char *template = &renderer->styles[node->type];
if (check_dom_node_source(renderer, string, length)) {
render_dom_flush(renderer, string);
renderer->position = string + length;
assert_source(renderer, renderer->position, 0);
}
while (length > 0 && !regexec(regex, string, 1, &regmatch, 0)) {
int matchlen = regmatch.rm_eo - regmatch.rm_so;
int offset = regmatch.rm_so;
if (!matchlen || offset < 0 || regmatch.rm_eo > length)
break;
if (offset > 0)
render_dom_text(renderer, template, string, offset);
string += offset;
length -= offset;
add_dom_link(renderer, string, matchlen);
length -= matchlen;
string += matchlen;
}
if (length > 0)
render_dom_text(renderer, template, string, length);
}
#endif
static void
render_dom_node_source(struct dom_stack *stack, struct dom_node *node, void *data)
{
@ -408,8 +468,16 @@ render_dom_node_source(struct dom_stack *stack, struct dom_node *node, void *dat
assert(node && renderer && renderer->document);
/* TODO: For (atleast) text, CDATA section and comment nodes check
* for URIs ala document->options.plain_display_links */
#ifdef HAVE_REGEX_H
if (renderer->find_url
&& (node->type == DOM_NODE_TEXT
|| node->type == DOM_NODE_CDATA_SECTION
|| node->type == DOM_NODE_COMMENT)) {
render_dom_node_enhanced_text(renderer, node);
return;
}
#endif
render_dom_node_text(renderer, &renderer->styles[node->type], node);
}
@ -634,5 +702,9 @@ render_dom_document(struct cache_entry *cached, struct document *document,
pop_dom_node(&parser->stack);
}
#ifdef HAVE_REGEX_H
if (renderer.find_url)
regfree(&renderer.url_regex);
#endif
done_sgml_parser(parser);
}