bool _get_next_domnodelist(dom_nodelist *list, unsigned int *iterator, dom_node **ret)
{
dom_exception err;
unsigned long len;
err = dom_nodelist_get_length(list, &len);
if (err != DOM_NO_ERR)
return false;
if (*iterator >= len)
return false;
err = dom_nodelist_item(list, (*iterator), ret);
if (err != DOM_NO_ERR)
return false;
(*iterator)++;
return true;
}
/**
* Extract an imagemap from html source
*
* \param node XML node containing map
* \param c Content containing document
* \param entry List of map entries
* \param tname The sub-tags to consider on this pass
* \return false on memory exhaustion, true otherwise
*/
static bool
imagemap_extract_map_entries(dom_node *node, html_content *c,
struct mapentry **entry, dom_string *tname)
{
dom_nodelist *nlist;
dom_exception exc;
unsigned long ent;
uint32_t tag_count;
exc = dom_element_get_elements_by_tag_name(node, tname, &nlist);
if (exc != DOM_NO_ERR) {
return false;
}
exc = dom_nodelist_get_length(nlist, &tag_count);
if (exc != DOM_NO_ERR) {
dom_nodelist_unref(nlist);
return false;
}
for (ent = 0; ent < tag_count; ++ent) {
dom_node *subnode;
exc = dom_nodelist_item(nlist, ent, &subnode);
if (exc != DOM_NO_ERR) {
dom_nodelist_unref(nlist);
return false;
}
if (imagemap_addtolist(c, subnode, c->base_url,
entry, tname) == false) {
dom_node_unref(subnode);
dom_nodelist_unref(nlist);
return false;
}
dom_node_unref(subnode);
}
dom_nodelist_unref(nlist);
return true;
}
/**
* Extract all imagemaps from a document tree
*
* \param c The content to extract imagemaps from.
* \return false on memory exhaustion, true otherwise
*/
nserror
imagemap_extract(html_content *c)
{
dom_nodelist *nlist;
dom_exception exc;
unsigned long mapnr;
uint32_t maybe_maps;
nserror ret = NSERROR_OK;
exc = dom_document_get_elements_by_tag_name(c->document,
corestring_dom_map,
&nlist);
if (exc != DOM_NO_ERR) {
return NSERROR_DOM;
}
exc = dom_nodelist_get_length(nlist, &maybe_maps);
if (exc != DOM_NO_ERR) {
ret = NSERROR_DOM;
goto out_nlist;
}
for (mapnr = 0; mapnr < maybe_maps; ++mapnr) {
dom_node *node;
dom_string *name;
exc = dom_nodelist_item(nlist, mapnr, &node);
if (exc != DOM_NO_ERR) {
ret = NSERROR_DOM;
goto out_nlist;
}
exc = dom_element_get_attribute(node, corestring_dom_id,
&name);
if (exc != DOM_NO_ERR) {
dom_node_unref(node);
ret = NSERROR_DOM;
goto out_nlist;
}
if (name == NULL) {
exc = dom_element_get_attribute(node,
corestring_dom_name,
&name);
if (exc != DOM_NO_ERR) {
dom_node_unref(node);
ret = NSERROR_DOM;
goto out_nlist;
}
}
if (name != NULL) {
struct mapentry *entry = NULL;
if (imagemap_extract_map(node, c, &entry) == false) {
if (entry != NULL) {
imagemap_freelist(entry);
}
dom_string_unref(name);
dom_node_unref(node);
ret = NSERROR_NOMEM; /** @todo check this */
goto out_nlist;
}
/* imagemap_extract_map may not extract anything,
* so entry can still be NULL here. This isn't an
* error as it just means that we've encountered
* an incorrectly defined <map>...</map> block
*/
if ((entry != NULL) &&
(imagemap_add(c, name, entry) == false)) {
imagemap_freelist(entry);
dom_string_unref(name);
dom_node_unref(node);
ret = NSERROR_NOMEM; /** @todo check this */
goto out_nlist;
}
}
dom_string_unref(name);
dom_node_unref(node);
}
out_nlist:
dom_nodelist_unref(nlist);
return ret;
}
