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Fix crash when a style element is not used because of mismatched media or type.

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svn path=/trunk/netsurf/; revision=8768
This commit is contained in:
John Mark Bell 2009-07-24 01:48:53 +00:00
parent 4af04582ad
commit 12e49b11c2
1 changed files with 19 additions and 16 deletions
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35
render/html.c
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@ -61,7 +61,7 @@ static void html_convert_css_callback(content_msg msg, struct content *css,
static bool html_meta_refresh(struct content *c, xmlNode *head);
static bool html_head(struct content *c, xmlNode *head);
static bool html_find_stylesheets(struct content *c, xmlNode *html);
static bool html_process_style_element(struct content *c, unsigned int index,
static bool html_process_style_element(struct content *c, unsigned int *index,
xmlNode *style);
static void html_object_callback(content_msg msg, struct content *object,
intptr_t p1, intptr_t p2, union content_msg_data data);
@ -972,10 +972,8 @@ bool html_find_stylesheets(struct content *c, xmlNode *html)
0, 0, false, c);
i++;
} else if (strcmp((const char *) node->name, "style") == 0) {
if (!html_process_style_element(c, i, node))
if (!html_process_style_element(c, &i, node))
return false;
i++;
}
}
@ -1029,12 +1027,13 @@ no_memory:
* Process an inline stylesheet in the document.
*
* \param c content structure
* \param index Index of stylesheet in stylesheet_content array
* \param index Index of stylesheet in stylesheet_content array,
* updated if successful
* \param style xml node of style element
* \return true on success, false if an error occurred
*/
bool html_process_style_element(struct content *c, unsigned int index,
bool html_process_style_element(struct content *c, unsigned int *index,
xmlNode *style)
{
xmlNode *child;
@ -1064,18 +1063,19 @@ bool html_process_style_element(struct content *c, unsigned int index,
/* Extend array */
stylesheet_content = talloc_realloc(c, c->data.html.stylesheet_content,
struct content *, index + 1);
struct content *, *index + 1);
if (stylesheet_content == NULL)
goto no_memory;
c->data.html.stylesheet_content = stylesheet_content;
/* create stylesheet */
c->data.html.stylesheet_content[index] =
c->data.html.stylesheet_content[(*index)] =
content_create(c->data.html.base_url);
if (c->data.html.stylesheet_content[index] == NULL)
if (c->data.html.stylesheet_content[(*index)] == NULL)
goto no_memory;
if (!content_set_type(c->data.html.stylesheet_content[index],
if (!content_set_type(c->data.html.stylesheet_content[(*index)],
CONTENT_CSS, "text/css", params, c))
/** \todo not necessarily caused by
* memory exhaustion */
@ -1087,7 +1087,7 @@ bool html_process_style_element(struct content *c, unsigned int index,
for (child = style->children; child != 0; child = child->next) {
data = (char *) xmlNodeGetContent(child);
if (!content_process_data(c->data.html.
stylesheet_content[index],
stylesheet_content[(*index)],
data, strlen(data))) {
xmlFree(data);
/** \todo not necessarily caused by
@ -1098,20 +1098,23 @@ bool html_process_style_element(struct content *c, unsigned int index,
}
/* Convert the content */
if (nscss_convert(c->data.html.stylesheet_content[index], c->width,
if (nscss_convert(c->data.html.stylesheet_content[(*index)], c->width,
c->height)) {
if (!content_add_user(c->data.html.stylesheet_content[index],
if (!content_add_user(c->data.html.stylesheet_content[(*index)],
html_convert_css_callback,
(intptr_t) c, index)) {
(intptr_t) c, (*index))) {
/* no memory */
c->data.html.stylesheet_content[index] = NULL;
c->data.html.stylesheet_content[(*index)] = NULL;
goto no_memory;
}
} else {
/* conversion failed */
c->data.html.stylesheet_content[index] = NULL;
c->data.html.stylesheet_content[(*index)] = NULL;
}
/* Update index */
(*index)++;
return true;
no_memory: