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/* 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 Document {
	prologue %{
#include "utils/corestrings.h"
#include "render/html_internal.h"
#include "utils/libdom.h"
%};
}

init Document("struct dom_document *" document::node);

method Document::write()
%{
	struct html_content *htmlc;
	duk_size_t text_len;
	for (int i = 0; i < duk_get_top(ctx); ++i)
		duk_safe_to_string(ctx, i);
	duk_concat(ctx, duk_get_top(ctx));
	const char *text = duk_safe_to_lstring(ctx, 0, &text_len);
	LOG("Writing %*s", (int)text_len, text);
	dom_exception err;
	err = dom_node_get_user_data(priv->parent.node,
				     corestring_dom___ns_key_html_content_data,
				     &htmlc);
	assert(htmlc != NULL);
	if (err == DOM_NO_ERR && htmlc->parser != NULL) {
		dom_hubbub_parser_insert_chunk(htmlc->parser, (uint8_t *)text, text_len);
	}
	return 0;
%}

method Document::createTextNode()
%{
	dom_node *newnode;
	dom_exception err;
	duk_size_t text_len;
	const char *text = duk_safe_to_lstring(ctx, 0, &text_len);
	dom_string *text_str;

	err = dom_string_create((const uint8_t*)text, text_len, &text_str);
	if (err != DOM_NO_ERR) return 0; /* coerced to undefined */

	err = dom_document_create_text_node(priv->parent.node,
					    text_str,
					    &newnode);
	if (err != DOM_NO_ERR) {
		dom_string_unref(text_str);
		return 0; /* coerced to undefined */
	}

	dom_string_unref(text_str);

	dukky_push_node(ctx, newnode);

	dom_node_unref(newnode);

	return 1;
%}

method Document::createElement()
%{
	dom_node *newnode;
	dom_exception err;
	duk_size_t text_len;
	const char *text = duk_safe_to_lstring(ctx, 0, &text_len);
	dom_string *text_str;

	err = dom_string_create((const uint8_t*)text, text_len, &text_str);
	if (err != DOM_NO_ERR) return 0; /* coerced to undefined */

	err = dom_document_create_element_ns(priv->parent.node,
					     corestring_dom_html_namespace,
					     text_str,
					     &newnode);
	if (err != DOM_NO_ERR) {
		dom_string_unref(text_str);
		return 0; /* coerced to undefined */
	}

	dom_string_unref(text_str);

	dukky_push_node(ctx, newnode);

	dom_node_unref(newnode);

	return 1;
%}

getter Document::head()
%{
	struct dom_nodelist *nodes;
	struct dom_node *retnode;
	dom_exception err;
	err = dom_document_get_elements_by_tag_name(priv->parent.node,
						    corestring_dom_HEAD,
						    &nodes);
	if (err != DOM_NO_ERR) return 0; /* coerced to undefined */

	err = dom_nodelist_item(nodes, 0, &retnode);

	if (err != DOM_NO_ERR) {
		dom_nodelist_unref(nodes);
		return 0; /* coerced to undefined */
	}

	dom_nodelist_unref(nodes);

	if (retnode == NULL) return 0; /* coerced to undefined */

	dukky_push_node(ctx, retnode);

	dom_node_unref(retnode);

	return 1;
%}

getter Document::body()
%{
	struct dom_nodelist *nodes;
	struct dom_node *retnode;
	dom_exception err;
	err = dom_document_get_elements_by_tag_name(priv->parent.node,
						    corestring_dom_BODY,
						    &nodes);
	if (err != DOM_NO_ERR) {
		return 0; /* coerced to undefined */
	}

	err = dom_nodelist_item(nodes, 0, &retnode);

	if (err != DOM_NO_ERR) {
		dom_nodelist_unref(nodes);
		return 0; /* coerced to undefined */
	}

	dom_nodelist_unref(nodes);

	if (retnode != NULL) {
		dukky_push_node(ctx, retnode);

		dom_node_unref(retnode);

		return 1;
	}

	return 0; /* coerced to undefined */
%}

getter Document::location()
%{
	/* retrieve the location object from the root object (window) */
	duk_push_global_object(ctx);
	duk_get_prop_string(ctx, -1, "location");
	if (duk_is_undefined(ctx, -1)) {
		duk_pop(ctx);
		return 0;
	}
	return 1;
%}


method Document::getElementById()
%{
	dom_string *elementId_dom;
	dom_element *element;
	dom_exception exc;
	duk_size_t text_len;
	const char *text = duk_safe_to_lstring(ctx, 0, &text_len);

	exc = dom_string_create((uint8_t*)text, text_len, &elementId_dom);
	if (exc != DOM_NO_ERR) {
		return 0;
	}

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

	if (element != NULL) {
		dukky_push_node(ctx, (dom_node *)element);
		dom_node_unref(element);
		return 1;
	}

	return 0;
%}

method Document::getElementsByTagName()
%{
	dom_nodelist *nodes;
	dom_exception err;
	duk_size_t text_len;
	const char *text = duk_safe_to_lstring(ctx, 0, &text_len);
	dom_string *tag;

	err = dom_string_create((uint8_t*)text, text_len, &tag);

	if (err != DOM_NO_ERR) return 0; /* coerced to undefined */

	err = dom_document_get_elements_by_tag_name(((node_private_t *)priv)->node,
						    tag, &nodes);
	dom_string_unref(tag);
	if (err != DOM_NO_ERR) return 0; /* coerced to undefined */

	if (nodes == NULL) return 0; /* coerced to undefined */

	duk_push_pointer(ctx, nodes);
	dukky_create_object(ctx, PROTO_NAME(NODELIST), 1);
	dom_nodelist_unref(nodes);
	return 1;
%}