/**
* Callback to determine if a node is the root node of the document.
*
* \param pw HTML document
* \param node DOM node
* \param match Pointer to location to receive result
* \return CSS_OK.
*
* \post \a match will contain true if the node matches and false otherwise.
*/
css_error node_is_root(void *pw, void *node, bool *match)
{
dom_node *n = node;
dom_node *parent;
dom_node_type type;
dom_exception err;
err = dom_node_get_parent_node(n, &parent);
if (err != DOM_NO_ERR) {
return CSS_NOMEM;
}
if (parent != NULL) {
err = dom_node_get_node_type(parent, &type);
dom_node_unref(parent);
if (err != DOM_NO_ERR)
return CSS_NOMEM;
if (type != DOM_DOCUMENT_NODE) {
*match = false;
return CSS_OK;
}
}
*match = true;
return CSS_OK;
}
static hubbub_error get_parent(void *parser, void *node, bool element_only,
void **result)
{
dom_hubbub_parser *dom_parser = (dom_hubbub_parser *) parser;
dom_exception err;
struct dom_node *parent;
dom_node_type type = DOM_NODE_TYPE_COUNT;
err = dom_node_get_parent_node((struct dom_node *) node,
&parent);
if (err != DOM_NO_ERR) {
dom_parser->msg(DOM_MSG_CRITICAL, dom_parser->mctx,
"Error in dom_node_get_parent");
return HUBBUB_UNKNOWN;
}
if (element_only == false) {
*result = parent;
return HUBBUB_OK;
}
err = dom_node_get_node_type(parent, &type);
if (err != DOM_NO_ERR) {
dom_parser->msg(DOM_MSG_CRITICAL, dom_parser->mctx,
"Error in dom_node_get_type");
goto fail;
}
if (type == DOM_ELEMENT_NODE) {
*result = parent;
return HUBBUB_OK;
} else {
*result = NULL;
dom_node_unref(parent);
return HUBBUB_OK;
}
return HUBBUB_OK;
fail:
dom_node_unref(parent);
return HUBBUB_UNKNOWN;
}
static bool save_complete_libdom_treewalk(dom_node *root,
bool (*callback)(dom_node *node,
save_complete_event_type event_type, void *ctx),
void *ctx)
{
dom_node *node;
node = dom_node_ref(root); /* tree root */
while (node != NULL) {
dom_node *next = NULL;
dom_exception exc;
exc = dom_node_get_first_child(node, &next);
if (exc != DOM_NO_ERR) {
dom_node_unref(node);
break;
}
if (next != NULL) { /* 1. children */
dom_node_unref(node);
node = next;
} else {
exc = dom_node_get_next_sibling(node, &next);
if (exc != DOM_NO_ERR) {
dom_node_unref(node);
break;
}
if (next != NULL) { /* 2. siblings */
if (callback(node, EVENT_LEAVE, ctx) == false) {
return false;
}
dom_node_unref(node);
node = next;
} else { /* 3. ancestor siblings */
while (node != NULL) {
exc = dom_node_get_next_sibling(node,
&next);
if (exc != DOM_NO_ERR) {
dom_node_unref(node);
node = NULL;
break;
}
if (next != NULL) {
dom_node_unref(next);
break;
}
exc = dom_node_get_parent_node(node,
&next);
if (exc != DOM_NO_ERR) {
dom_node_unref(node);
node = NULL;
break;
}
if (callback(node, EVENT_LEAVE,
ctx) == false) {
return false;
}
dom_node_unref(node);
node = next;
}
if (node == NULL)
break;
exc = dom_node_get_next_sibling(node, &next);
if (exc != DOM_NO_ERR) {
dom_node_unref(node);
break;
}
if (callback(node, EVENT_LEAVE, ctx) == false) {
return false;
}
dom_node_unref(node);
node = next;
}
}
assert(node != NULL);
if (callback(node, EVENT_ENTER, ctx) == false) {
return false; /* callback caused early termination */
}
}
return true;
}