gboolean
watch_tree_check (WatchTree *tree,
const gchar *path)
{
WatchTree *root_node = (WatchTree *) tree;
WatchTree *node;
StringRef ref;
/* '/' */
node = root_node;
ref.str = (gchar *) path;
ref.len = 1;
if (node->watchers)
return TRUE;
while (ref.str[ref.len])
{
ref.str += ref.len;
ref.len = strcspn (ref.str, "/");
if (ref.str[ref.len] == '/')
ref.len++;
node = tree_node_get_child (node, &ref, FALSE);
if (!node)
break;
if (node->watchers)
return TRUE;
}
return FALSE;
}
void
watch_tree_add (WatchTree *tree,
const gchar *path,
gpointer data)
{
WatchTree *root_node = (WatchTree *) tree;
WatchTree *node;
StringRef ref;
/* '/' */
node = root_node;
ref.str = (gchar *) path;
ref.len = 1;
while (ref.str[ref.len])
{
ref.str += ref.len;
ref.len = strcspn (ref.str, "/");
if (ref.str[ref.len] == '/')
ref.len++;
node = tree_node_get_child (node, &ref, TRUE);
}
node->watchers = g_slist_prepend (node->watchers, data);
}
/**
* Informs the hotlist that some content has been visited. Internal procedure.
*
* \param content the content visited
* \param node the node to update siblings and children of
*/
static void hotlist_visited_internal(hlcache_handle *content, struct node *node)
{
struct node *child;
const char *text;
const char *url;
if (content == NULL ||
hlcache_handle_get_url(content) == NULL ||
hotlist_tree == NULL)
return;
/* TODO: do this with a nsurl instead */
url = nsurl_access(hlcache_handle_get_url(content));
for (; node; node = tree_node_get_next(node)) {
if (!tree_node_is_folder(node)) {
text = tree_url_node_get_url(node);
if (strcmp(text, url) == 0) {
tree_update_URL_node(hotlist_tree, node,
url, NULL);
}
}
child = tree_node_get_child(node);
if (child != NULL) {
hotlist_visited_internal(content, child);
}
}
}
WatchTreeRemoveResult
watch_tree_remove (WatchTree *tree,
const gchar *path,
gpointer data)
{
WatchTree *root_node = (WatchTree *) tree;
WatchTreeRemoveResult result;
GSList *backtrack;
WatchTree *node;
StringRef ref;
/* '/' */
node = root_node;
ref.str = (gchar *) path;
ref.len = 1;
backtrack = NULL;
while (ref.str[ref.len])
{
GSList *tmp = g_newa (GSList, 1);
tmp->data = node;
tmp->next = backtrack;
backtrack = tmp;
ref.str += ref.len;
ref.len = strcspn (ref.str, "/");
if (ref.str[ref.len] == '/')
ref.len++;
node = tree_node_get_child (node, &ref, FALSE);
g_assert (node != NULL);
}
node->watchers = g_slist_remove (node->watchers, data);
if (node->watchers != NULL)
/* nothing changes */
result = WATCH_TREE_REMOVE_RESULT_NONE;
else if (node->children && g_hash_table_size (node->children))
/* there are still child watches, so we have to check */
result = WATCH_TREE_REMOVE_RESULT_SOME;
else
/* no watchers and no child watches -- remove all */
result = WATCH_TREE_REMOVE_RESULT_ALL;
while (node->watchers == NULL && (!node->children || g_hash_table_size (node->children)) == 0 && backtrack)
{
WatchTree *parent = backtrack->data;
g_hash_table_remove (parent->children, node);
backtrack = backtrack->next;
node = parent;
}
return result;
}
/**
* Add a directory to the HTML tree for saving.
*
* \param directory hotlist directory to add
* \param node node to add ul to
* \return true on success, false on memory exhaustion
*/
static bool tree_url_save_directory(struct node *directory, xmlNode *node)
{
struct node *child;
xmlNode *ul, *h4;
const char *text;
ul = xmlNewChild(node, NULL, (const xmlChar *)"ul", NULL);
if (ul == NULL)
return false;
if (tree_node_is_default(directory) == true)
xmlSetProp(ul, (const xmlChar *) "id",
(const xmlChar *) "default");
for (child = tree_node_get_child(directory); child;
child = tree_node_get_next(child)) {
if (!tree_node_is_folder(child)) {
/* entry */
if (!tree_url_save_entry(child, ul))
return false;
} else {
/* directory */
/* invalid HTML */
text = tree_url_node_get_title(child);
if (text == NULL)
return false;
h4 = xmlNewTextChild(ul, NULL,
(const xmlChar *) "h4",
(const xmlChar *) text);
if (h4 == NULL)
return false;
if (!tree_url_save_directory(child, ul))
return false;
} }
return true;
}
GSList *
watch_tree_collect (WatchTree *tree,
const gchar *path)
{
WatchTree *root_node = (WatchTree *) tree;
GSList *list = NULL;
WatchTree *node;
StringRef ref;
/* '/' */
node = root_node;
ref.str = (gchar *) path;
ref.len = 1;
if (node->watchers)
list = g_slist_prepend (list, node);
while (ref.str[ref.len])
{
ref.str += ref.len;
ref.len = strcspn (ref.str, "/");
if (ref.str[ref.len] == '/')
ref.len++;
node = tree_node_get_child (node, &ref, FALSE);
if (!node)
break;
if (node->watchers)
list = g_slist_prepend (list, node);
}
/* if this was a directory operation, it impacts all children as well */
if (node && ref.str[ref.len - 1] == '/')
watch_tree_collect_children (node, &list);
return list;
}
