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-rw-r--r--src/html/html_collection.c300
1 files changed, 300 insertions, 0 deletions
diff --git a/src/html/html_collection.c b/src/html/html_collection.c
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+/*
+ * This file is part of libdom.
+ * Licensed under the MIT License,
+ * http://www.opensource.org/licenses/mit-license.php
+ * Copyright 2009 Bo Yang <struggleyb.nku@gmail.com>
+ */
+
+#include <assert.h>
+
+#include <libwapcaplet/libwapcaplet.h>
+
+#include "html/html_collection.h"
+
+#include "core/node.h"
+#include "core/document.h"
+#include "core/element.h"
+#include "core/string.h"
+
+/*-----------------------------------------------------------------------*/
+/* Constructor and destructor */
+
+/**
+ * Create a dom_html_collection
+ *
+ * \param doc The document
+ * \param root The root element of the collection
+ * \param ic The callback function used to determin whether certain node
+ * belongs to the collection
+ * \param col The result collection object
+ * \return DOM_NO_ERR on success, appropriate dom_exception on failure.
+ */
+dom_exception _dom_html_collection_create(struct dom_document *doc,
+ struct dom_node_internal *root,
+ dom_callback_is_in_collection ic,
+ struct dom_html_collection **col)
+{
+ *col = _dom_document_alloc(doc, NULL, sizeof(dom_html_collection));
+ if (*col == NULL)
+ return DOM_NO_MEM_ERR;
+
+ return _dom_html_collection_initialise(doc, *col, root, ic);
+}
+
+/**
+ * Intialiase a dom_html_collection
+ *
+ * \param doc The document
+ * \param col The collection object to be initialised
+ * \param root The root element of the collection
+ * \param ic The callback function used to determin whether certain node
+ * belongs to the collection
+ * \return DOM_NO_ERR on success.
+ */
+dom_exception _dom_html_collection_initialise(struct dom_document *doc,
+ struct dom_html_collection *col,
+ struct dom_node_internal *root,
+ dom_callback_is_in_collection ic)
+{
+ assert(doc != NULL);
+ assert(ic != NULL);
+ assert(root != NULL);
+
+ col->doc = doc;
+ dom_node_ref(doc);
+
+ col->root = root;
+ dom_node_ref(root);
+
+ col->ic = ic;
+ col->refcnt = 1;
+
+ return DOM_NO_ERR;
+}
+
+/**
+ * Finalise a dom_html_collection object
+ *
+ * \param col The dom_html_collection object
+ */
+void _dom_html_collection_finalise(struct dom_html_collection *col)
+{
+ dom_node_unref(col->doc);
+ col->doc = NULL;
+
+ dom_node_unref(col->root);
+ col->root = NULL;
+
+ col->ic = NULL;
+}
+
+/**
+ * Destroy a dom_html_collection object
+ * \param col The dom_html_collection object
+ */
+void _dom_html_collection_destroy(struct dom_html_collection *col)
+{
+ struct dom_document *doc = col->doc;
+ _dom_html_collection_finalise(col);
+
+ _dom_document_alloc(doc, col, 0);
+}
+
+
+/*-----------------------------------------------------------------------*/
+/* Public API */
+
+/**
+ * Get the length of this dom_html_collection
+ *
+ * \param col The dom_html_collection object
+ * \param len The returned length of this collection
+ * \return DOM_NO_ERR on success.
+ */
+dom_exception dom_html_collection_get_length(dom_html_collection *col,
+ unsigned long *len)
+{
+ struct dom_node_internal *node = col->root;
+ *len = 0;
+
+ while (node != NULL) {
+ if (node->type == DOM_ELEMENT_NODE && col->ic(node) == true)
+ (*len)++;
+
+ /* Depth first iterating */
+ if (node->first_child != NULL) {
+ node = node->first_child;
+ } else if (node->next != NULL) {
+ node = node->next;
+ } else {
+ /* No children and siblings */
+ struct dom_node_internal *parent = node->parent;
+
+ while (parent != col->root &&
+ node == parent->last_child) {
+ node = parent;
+ parent = parent->parent;
+ }
+
+ if (parent == col->root)
+ node = NULL;
+ else
+ node = node->next;
+ }
+ }
+
+ return DOM_NO_ERR;
+}
+
+/**
+ * Get the node with certain index
+ *
+ * \param col The dom_html_collection object
+ * \param index The index number based on zero
+ * \param node The returned node object
+ * \return DOM_NO_ERR on success.
+ */
+dom_exception dom_html_collection_item(dom_html_collection *col,
+ unsigned long index, struct dom_node **node)
+{
+ struct dom_node_internal *n = col->root;
+ unsigned long len = 0;
+
+ while (n != NULL) {
+ if (n->type == DOM_ELEMENT_NODE && col->ic(n) == true)
+ len++;
+
+ if (len == index + 1) {
+ dom_node_ref(n);
+ *node = (struct dom_node *) n;
+ return DOM_NO_ERR;
+ }
+
+ /* Depth first iterating */
+ if (n->first_child != NULL) {
+ n = n->first_child;
+ } else if (n->next != NULL) {
+ n = n->next;
+ } else {
+ /* No children and siblings */
+ struct dom_node_internal *parent = n->parent;
+
+ while (parent != col->root &&
+ n == parent->last_child) {
+ n = parent;
+ parent = parent->parent;
+ }
+
+ if (parent == col->root)
+ n = NULL;
+ else
+ n = n->next;
+ }
+ }
+
+ /* Not find the node */
+ *node = NULL;
+ return DOM_NO_ERR;
+}
+
+/**
+ * Get the node in the collection according name
+ *
+ * \param col The collection
+ * \param name The name of target node
+ * \param node The returned node object
+ * \return DOM_NO_ERR on success.
+ */
+dom_exception dom_html_collection_named_item(dom_html_collection *col,
+ struct dom_string *name, struct dom_node **node)
+{
+ struct dom_node_internal *n = col->root;
+ dom_exception err;
+ lwc_string *str = NULL;
+ err = _dom_node_get_intern_string(n, name, &str);
+ if (err != DOM_NO_ERR)
+ return err;
+
+
+ while (node != NULL) {
+ if (n->type == DOM_ELEMENT_NODE && col->ic(n) == true) {
+ lwc_string *id = NULL;
+ err = _dom_element_get_id((struct dom_element *) n,
+ &id);
+ if (err != DOM_NO_ERR) {
+ _dom_node_unref_intern_string(n, id);
+ return err;
+ }
+
+ /* Compare the lwc_string directly */
+ if (str == id) {
+ *node = (struct dom_node *) n;
+ dom_node_ref(n);
+ _dom_node_unref_intern_string(n, id);
+ _dom_node_unref_intern_string(n, str);
+
+ return DOM_NO_ERR;
+ }
+
+ _dom_node_unref_intern_string(n, id);
+ }
+
+ /* Depth first iterating */
+ if (n->first_child != NULL) {
+ n = n->first_child;
+ } else if (n->next != NULL) {
+ n = n->next;
+ } else {
+ /* No children and siblings */
+ struct dom_node_internal *parent = n->parent;
+
+ while (parent != col->root &&
+ n == parent->last_child) {
+ n = parent;
+ parent = parent->parent;
+ }
+
+ if (parent == col->root)
+ n = NULL;
+ else
+ n = n->next;
+ }
+ }
+
+ /* Not found the target node */
+ *node = NULL;
+ _dom_node_unref_intern_string(n, str);
+
+ return DOM_NO_ERR;
+}
+
+/**
+ * Claim a reference on this collection
+ *
+ * \pram col The collection object
+ */
+void dom_html_collection_ref(dom_html_collection *col)
+{
+ if (col == NULL)
+ return;
+
+ col->refcnt ++;
+}
+
+/**
+ * Relese a reference on this collection
+ *
+ * \pram col The collection object
+ */
+void dom_html_collection_unref(dom_html_collection *col)
+{
+ if (col == NULL)
+ return;
+
+ if (col->refcnt > 0)
+ col->refcnt --;
+
+ if (col->refcnt == 0)
+ _dom_html_collection_destroy(col);
+}
+
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