netsurf/content/handlers/javascript/duktape/Element.bnd

/* document binding for browser using duktape and libdom
 *
 * Copyright 2015 Vincent Sanders <vince@netsurf-browser.org>
 *
 * This file is part of NetSurf, http://www.netsurf-browser.org/
 *
 * Released under the terms of the MIT License,
 *         http://www.opensource.org/licenses/mit-license
 */

class Element {
	prologue %{
#include <utils/corestrings.h>
%};
};

init Element(struct dom_element *element::node);

getter Element::firstElementChild()
%{
	dom_node *element;
	dom_exception exc;
	dom_node_type node_type;
	dom_node *next_node;

	exc = dom_node_get_first_child(((node_private_t*)priv)->node, &element);
	if (exc != DOM_NO_ERR) {
		return 0;
	}

	while (element != NULL) {
		exc = dom_node_get_node_type(element, &node_type);
		if ((exc == DOM_NO_ERR) && (node_type == DOM_ELEMENT_NODE)) {
			/* found it */
			break;
		}

		exc = dom_node_get_next_sibling(element, &next_node);
		dom_node_unref(element);
		if (exc == DOM_NO_ERR) {
			element = next_node;
		} else {
			element = NULL;
		}
	}
	if (dukky_push_node(ctx, (dom_node *)element) == false) {
		dom_node_unref(element);
		return 0;
	}
	dom_node_unref(element);
	return 1;
%}

getter Element::lastElementChild()
%{
	dom_node *element;
	dom_exception exc;
	dom_node_type node_type;
	dom_node *next_node;

	exc = dom_node_get_last_child(((node_private_t*)priv)->node, &element);
	if (exc != DOM_NO_ERR) {
		return 0;
	}

	while (element != NULL) {
		exc = dom_node_get_node_type(element, &node_type);
		if ((exc == DOM_NO_ERR) && (node_type == DOM_ELEMENT_NODE)) {
			/* found it */
			break;
		}

		exc = dom_node_get_previous_sibling(element, &next_node);
		dom_node_unref(element);
		if (exc == DOM_NO_ERR) {
			element = next_node;
		} else {
			element = NULL;
		}
	}
	if (dukky_push_node(ctx, (dom_node *)element) == false) {
		dom_node_unref(element);
		return 0;
	}
	dom_node_unref(element);
	return 1;
%}

getter Element::previousElementSibling()
%{
	dom_node *element;
	dom_exception exc;
	dom_node_type node_type;
	dom_node *sib_node;

	exc = dom_node_get_previous_sibling(((node_private_t *)priv)->node, &element);
	if (exc != DOM_NO_ERR) {
		return 0;
	}

	while (element != NULL) {
		exc = dom_node_get_node_type(element, &node_type);
		if ((exc == DOM_NO_ERR) && (node_type == DOM_ELEMENT_NODE)) {
			/* found it */
			break;
		}

		exc = dom_node_get_previous_sibling(element, &sib_node);
		dom_node_unref(element);
		if (exc == DOM_NO_ERR) {
			element = sib_node;
		} else {
			element = NULL;
		}
	}
	if (dukky_push_node(ctx, (dom_node *)element) == false) {
		dom_node_unref(element);
		return 0;
	}
	dom_node_unref(element);
	return 1;
%}

getter Element::nextElementSibling()
%{
	dom_node *element;
	dom_exception exc;
	dom_node_type node_type;
	dom_node *sib_node;

	exc = dom_node_get_next_sibling(((node_private_t *)priv)->node, &element);
	if (exc != DOM_NO_ERR) {
		return 0;
	}

	while (element != NULL) {
		exc = dom_node_get_node_type(element, &node_type);
		if ((exc == DOM_NO_ERR) && (node_type == DOM_ELEMENT_NODE)) {
			/* found it */
			break;
		}

		exc = dom_node_get_next_sibling(element, &sib_node);
		dom_node_unref(element);
		if (exc == DOM_NO_ERR) {
			element = sib_node;
		} else {
			element = NULL;
		}
	}
	if (dukky_push_node(ctx, (dom_node *)element) == false) {
		dom_node_unref(element);
		return 0;
	}
	dom_node_unref(element);
	return 1;
%}

getter Element::childElementCount()
%{
	dom_node *element;
	dom_exception exc;
	dom_node_type node_type;
	dom_node *next_node;
	duk_uint_t jsret = 0;

	exc = dom_node_get_first_child(((node_private_t *)priv)->node, &element);
	if (exc != DOM_NO_ERR) {
		return 0;
	}

	while (element != NULL) {
		exc = dom_node_get_node_type(element, &node_type);
		if ((exc == DOM_NO_ERR) && (node_type == DOM_ELEMENT_NODE)) {
			jsret += 1;
		}

		exc = dom_node_get_next_sibling(element, &next_node);
		dom_node_unref(element);
		if (exc == DOM_NO_ERR) {
			element = next_node;
		} else {
			element = NULL;
		}
	}
	NSLOG(netsurf, INFO, "I found %u of them", jsret);
	duk_push_uint(ctx, jsret);
	return 1;
%}

method Element::getElementsByTagName ()
%{
	dom_nodelist *nlist = NULL;
	dom_exception exc;
	dom_string *tagname;
	duk_size_t len;
	const char *str = duk_to_lstring(ctx, 0, &len);

	exc = dom_string_create((const uint8_t *)str, len, &tagname);

	if (exc != DOM_NO_ERR) return 0;

	exc = dom_element_get_elements_by_tag_name(priv->parent.node,
						   tagname, &nlist);
	dom_string_unref(tagname);
	if (exc != DOM_NO_ERR) return 0;

	dukky_push_generics(ctx, "makeListProxy");

	duk_push_pointer(ctx, nlist);
	dukky_create_object(ctx, PROTO_NAME(NODELIST), 1);
	dom_nodelist_unref(nlist);

	if (dukky_pcall(ctx, 1, false) != 0) {
		NSLOG(dukky, DEBUG, "Unable to construct nodelist?");
		return 0; /* coerced to undefined */
	}

	return 1;
%}

getter Element::id ()
%{
	dom_string *idstr = NULL;
	dom_exception exc;

	exc = dom_element_get_attribute(priv->parent.node,
					corestring_dom_id,
					&idstr);
	if (exc != DOM_NO_ERR) return 0;
	if (idstr == NULL) {
		duk_push_lstring(ctx, "", 0);
	} else {
		duk_push_lstring(ctx, dom_string_data(idstr),
				 dom_string_length(idstr));
		dom_string_unref(idstr);
	}
	return 1;
%}

setter Element::id ()
%{
	dom_string *idstr = NULL;
	dom_exception exc;
	duk_size_t slen;
	const char *s = duk_safe_to_lstring(ctx, 0, &slen);

	exc = dom_string_create((const uint8_t *)s, slen, &idstr);
	if (exc != DOM_NO_ERR) return 0;

	exc = dom_element_set_attribute(priv->parent.node,
					corestring_dom_id,
					idstr);
	dom_string_unref(idstr);
	if (exc != DOM_NO_ERR) return 0;
	return 0;
%}


method Element::removeAttribute()
%{
	dom_string *attr = NULL;
	dom_exception exc;
	duk_size_t slen;
	const char *s = duk_safe_to_lstring(ctx, 0, &slen);

	exc = dom_string_create((const uint8_t *)s, slen, &attr);
	if (exc != DOM_NO_ERR) return 0;

	exc = dom_element_remove_attribute(priv->parent.node, attr);
	dom_string_unref(attr);
	if (exc != DOM_NO_ERR) return 0;
	return 0;
%}

method Element::getAttribute()
%{
	dom_string *attr_name = NULL;
	dom_string *attr_value = NULL;
	dom_exception exc;
	duk_size_t slen;

	const char *s = duk_safe_to_lstring(ctx, 0, &slen);
	exc = dom_string_create((const uint8_t *)s, slen, &attr_name);
	duk_pop(ctx);

	exc = dom_element_get_attribute(priv->parent.node,
			attr_name, &attr_value);
	dom_string_unref(attr_name);
	if (exc != DOM_NO_ERR) {
		return 0;
	}

	if (attr_value == NULL) {
		duk_push_null(ctx);
	} else {
		duk_push_lstring(ctx, dom_string_data(attr_value),
				 dom_string_length(attr_value));
		dom_string_unref(attr_value);
	}
	return 1;
%}

method Element::setAttribute()
%{
	dom_exception exc;
	dom_string *attr_str, *value_str;
	duk_size_t attr_len, value_len;
	const char *attr = duk_safe_to_lstring(ctx, 0, &attr_len);
	const char *value = duk_safe_to_lstring(ctx, 1, &value_len);

	exc = dom_string_create((const uint8_t *)attr, attr_len, &attr_str);
	if (exc != DOM_NO_ERR) return 0;

	exc = dom_string_create((const uint8_t *)value, value_len, &value_str);
	if (exc != DOM_NO_ERR) {
		dom_string_unref(attr_str);
		return 0;
	}

	exc = dom_element_set_attribute(priv->parent.node,
			attr_str, value_str);
	dom_string_unref(attr_str);
	dom_string_unref(value_str);
	if (exc != DOM_NO_ERR) return 0;
	return 0;
%}

method Element::hasAttribute()
%{
	dom_string *attr_name = NULL;
	dom_exception exc;
	duk_size_t slen;
	bool res;

	const char *s = duk_safe_to_lstring(ctx, 0, &slen);
	exc = dom_string_create((const uint8_t *)s, slen, &attr_name);
	duk_pop(ctx);

	exc = dom_element_has_attribute(priv->parent.node,
			attr_name, &res);
	dom_string_unref(attr_name);
	if (exc != DOM_NO_ERR) {
		return 0;
	}

	duk_push_boolean(ctx, res);
	return 1;
%}

getter Element::className ()
%{
	dom_string *classstr = NULL;
	dom_exception exc;

	exc = dom_element_get_attribute(priv->parent.node,
					corestring_dom_class,
					&classstr);
	if (exc != DOM_NO_ERR) return 0;
	if (classstr == NULL) {
		duk_push_lstring(ctx, "", 0);
	} else {
		duk_push_lstring(ctx, dom_string_data(classstr),
				 dom_string_length(classstr));
		dom_string_unref(classstr);
	}
	return 1;
%}

setter Element::className ()
%{
	dom_string *classstr = NULL;
	dom_exception exc;
	duk_size_t slen;
	const char *s = duk_safe_to_lstring(ctx, 0, &slen);

	exc = dom_string_create((const uint8_t *)s, slen, &classstr);
	if (exc != DOM_NO_ERR) return 0;

	exc = dom_element_set_attribute(priv->parent.node,
					corestring_dom_class,
					classstr);
	dom_string_unref(classstr);
	if (exc != DOM_NO_ERR) return 0;
	return 0;
%}