mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-12-23 20:46:50 +03:00
ce32141057
by splitting javascript engine specific makefiles and source up we avoid having to consider old JSAPI or none code while working on duktape.
390 lines
10 KiB
C
390 lines
10 KiB
C
/*
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* Copyright 2012 Vincent Sanders <vince@netsurf-browser.org>
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* Copyright 2015 All of us.
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** \file
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* Duktapeish implementation of javascript engine functions.
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*/
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#include "content/content.h"
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#include "utils/nsoption.h"
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#include "utils/log.h"
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#include "utils/corestrings.h"
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#include "javascript/js.h"
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#include "javascript/content.h"
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#include "duktape/binding.h"
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#include "duktape.h"
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#include "dukky.h"
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#include <dom/dom.h>
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static duk_ret_t dukky_populate_object(duk_context *ctx)
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{
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/* ... obj args protoname nargs */
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int nargs = duk_get_int(ctx, -1);
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duk_pop(ctx);
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/* ... obj args protoname */
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duk_get_global_string(ctx, PROTO_MAGIC);
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/* .. obj args protoname prototab */
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duk_insert(ctx, -2);
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/* ... obj args prototab protoname */
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duk_get_prop(ctx, -2);
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/* ... obj args prototab {proto/undefined} */
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if (duk_is_undefined(ctx, -1)) {
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LOG("RuhRoh, couldn't find a prototype, HTMLUnknownElement it is");
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duk_pop(ctx);
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duk_push_string(ctx, PROTO_NAME(HTMLUNKNOWNELEMENT));
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duk_get_prop(ctx, -2);
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}
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/* ... obj args prototab proto */
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duk_dup(ctx, -1);
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/* ... obj args prototab proto proto */
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duk_set_prototype(ctx, -(nargs+4));
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/* ... obj[proto] args prototab proto */
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duk_get_prop_string(ctx, -1, INIT_MAGIC);
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/* ... obj[proto] args prototab proto initfn */
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duk_insert(ctx, -(nargs+4));
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/* ... initfn obj[proto] args prototab proto */
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duk_pop_2(ctx);
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/* ... initfn obj[proto] args */
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LOG("Call the init function");
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duk_call(ctx, nargs + 1);
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return 1; /* The object */
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}
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duk_ret_t dukky_create_object(duk_context *ctx, const char *name, int args)
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{
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duk_ret_t ret;
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LOG("name=%s nargs=%d", name+2, args);
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/* ... args */
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duk_push_object(ctx);
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/* ... args obj */
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duk_insert(ctx, -(args+1));
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/* ... obj args */
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duk_push_string(ctx, name);
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/* ... obj args name */
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duk_push_int(ctx, args);
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/* ... obj args name nargs */
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if ((ret = duk_safe_call(ctx, dukky_populate_object, args + 3, 1))
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!= DUK_EXEC_SUCCESS)
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return ret;
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LOG("created");
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return DUK_EXEC_SUCCESS;
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}
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duk_bool_t
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dukky_push_node_stacked(duk_context *ctx)
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{
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int top_at_fail = duk_get_top(ctx) - 2;
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/* ... nodeptr klass */
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duk_get_global_string(ctx, NODE_MAGIC);
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/* ... nodeptr klass nodes */
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duk_dup(ctx, -3);
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/* ... nodeptr klass nodes nodeptr */
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duk_get_prop(ctx, -2);
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/* ... nodeptr klass nodes node/undefined */
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if (duk_is_undefined(ctx, -1)) {
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/* ... nodeptr klass nodes undefined */
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duk_pop(ctx);
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/* ... nodeptr klass nodes */
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duk_push_object(ctx);
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/* ... nodeptr klass nodes obj */
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duk_dup(ctx, -4);
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/* ... nodeptr klass nodes obj nodeptr */
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duk_dup(ctx, -4);
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/* ... nodeptr klass nodes obj nodeptr klass */
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duk_push_int(ctx, 1);
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/* ... nodeptr klass nodes obj nodeptr klass 1 */
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if (duk_safe_call(ctx, dukky_populate_object, 4, 1)
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!= DUK_EXEC_SUCCESS) {
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duk_set_top(ctx, top_at_fail);
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LOG("Boo and also hiss");
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return false;
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}
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/* ... nodeptr klass nodes node */
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duk_dup(ctx, -4);
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/* ... nodeptr klass nodes node nodeptr */
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duk_dup(ctx, -2);
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/* ... nodeptr klass nodes node nodeptr node */
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duk_put_prop(ctx, -4);
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/* ... nodeptr klass nodes node */
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}
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/* ... nodeptr klass nodes node */
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duk_insert(ctx, -4);
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/* ... node nodeptr klass nodes */
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duk_pop_3(ctx);
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/* ... node */
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return true;
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}
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static void
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dukky_push_node_klass(duk_context *ctx, struct dom_node *node)
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{
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dom_node_type nodetype;
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dom_exception err;
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err = dom_node_get_node_type(node, &nodetype);
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if (err != DOM_NO_ERR) {
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/* Oh bum, just node then */
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duk_push_string(ctx, PROTO_NAME(NODE));
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return;
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}
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switch(nodetype) {
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case DOM_ELEMENT_NODE: {
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dom_string *namespace, *tag;
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err = dom_node_get_namespace(node, &namespace);
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if (err != DOM_NO_ERR) {
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/* Feck it, element */
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LOG("dom_node_get_namespace() failed");
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duk_push_string(ctx, PROTO_NAME(ELEMENT));
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break;
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}
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if (namespace == NULL) {
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/* No namespace, -> element */
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LOG("no namespace");
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duk_push_string(ctx, PROTO_NAME(ELEMENT));
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break;
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}
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if (dom_string_isequal(namespace, corestring_dom_html_namespace) == false) {
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/* definitely not an HTML element of some kind */
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duk_push_string(ctx, PROTO_NAME(ELEMENT));
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dom_string_unref(namespace);
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break;
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}
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dom_string_unref(namespace);
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err = dom_node_get_node_name(node, &tag);
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if (err != DOM_NO_ERR) {
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duk_push_string(ctx, PROTO_NAME(HTMLUNKNOWNELEMENT));
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break;
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}
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duk_push_string(ctx, PROTO_NAME(HTML));
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duk_push_lstring(ctx, dom_string_data(tag), dom_string_length(tag));
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dom_string_unref(tag);
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duk_push_string(ctx, "ELEMENT");
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duk_concat(ctx, 3);
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break;
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}
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case DOM_TEXT_NODE:
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duk_push_string(ctx, PROTO_NAME(TEXT));
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break;
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case DOM_COMMENT_NODE:
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duk_push_string(ctx, PROTO_NAME(COMMENT));
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break;
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case DOM_DOCUMENT_NODE:
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duk_push_string(ctx, PROTO_NAME(DOCUMENT));
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break;
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case DOM_ATTRIBUTE_NODE:
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case DOM_PROCESSING_INSTRUCTION_NODE:
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case DOM_DOCUMENT_TYPE_NODE:
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case DOM_DOCUMENT_FRAGMENT_NODE:
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case DOM_NOTATION_NODE:
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case DOM_ENTITY_REFERENCE_NODE:
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case DOM_ENTITY_NODE:
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case DOM_CDATA_SECTION_NODE:
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default:
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/* Oh bum, just node then */
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duk_push_string(ctx, PROTO_NAME(NODE));
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}
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}
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duk_bool_t
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dukky_push_node(duk_context *ctx, struct dom_node *node)
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{
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LOG("Pushing node %p", node);
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/* First check if we can find the node */
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/* ... */
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duk_get_global_string(ctx, NODE_MAGIC);
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/* ... nodes */
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duk_push_pointer(ctx, node);
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/* ... nodes nodeptr */
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duk_get_prop(ctx, -2);
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/* ... nodes node/undefined */
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if (!duk_is_undefined(ctx, -1)) {
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/* ... nodes node */
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duk_insert(ctx, -2);
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/* ... node nodes */
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duk_pop(ctx);
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/* ... node */
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LOG("Found it memoised");
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return true;
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}
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/* ... nodes undefined */
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duk_pop_2(ctx);
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/* ... */
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/* We couldn't, so now we determine the node type and then
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* we ask for it to be created
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*/
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duk_push_pointer(ctx, node);
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/* ... nodeptr */
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dukky_push_node_klass(ctx, node);
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/* ... nodeptr klass */
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return dukky_push_node_stacked(ctx);
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}
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static duk_ret_t
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dukky_bad_constructor(duk_context *ctx)
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{
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duk_error(ctx, DUK_ERR_ERROR, "Bad constructor");
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return 0;
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}
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void
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dukky_inject_not_ctr(duk_context *ctx, int idx, const char *name)
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{
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/* ... p[idx] ... proto */
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duk_push_c_function(ctx, dukky_bad_constructor, 0);
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/* ... p[idx] ... proto cons */
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duk_insert(ctx, -2);
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/* ... p[idx] ... cons proto */
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duk_put_prop_string(ctx, -2, "prototype");
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/* ... p[idx] ... cons[proto] */
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duk_put_prop_string(ctx, idx, name);
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/* ... p ... */
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return;
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}
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/**************************************** js.h ******************************/
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struct jscontext {
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duk_context *ctx;
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duk_context *thread;
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};
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#define CTX (ctx->thread)
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void js_initialise(void)
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{
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/** TODO: Forces JS on for our testing, needs changing before a release
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* lest we incur the wrath of others.
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*/
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nsoption_set_bool(enable_javascript, true);
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javascript_init();
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}
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void js_finalise(void)
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{
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/* NADA for now */
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}
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#define DUKKY_NEW_PROTOTYPE(klass, uklass, klass_name) \
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dukky_create_prototype(ctx, dukky_##klass##___proto, PROTO_NAME(uklass), klass_name)
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nserror js_newcontext(int timeout, jscallback *cb, void *cbctx,
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jscontext **jsctx)
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{
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duk_context *ctx;
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jscontext *ret = calloc(1, sizeof(*ret));
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*jsctx = NULL;
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LOG("Creating new duktape javascript context");
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if (ret == NULL) return NSERROR_NOMEM;
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ctx = ret->ctx = duk_create_heap_default();
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if (ret->ctx == NULL) { free(ret); return NSERROR_NOMEM; }
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/* Create the prototype stuffs */
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duk_push_global_object(ctx);
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duk_push_boolean(ctx, true);
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duk_put_prop_string(ctx, -2, "protos");
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duk_put_global_string(ctx, PROTO_MAGIC);
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/* Create prototypes here */
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dukky_create_prototypes(ctx);
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*jsctx = ret;
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return NSERROR_OK;
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}
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void js_destroycontext(jscontext *ctx)
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{
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LOG("Destroying duktape javascript context");
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duk_destroy_heap(ctx->ctx);
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free(ctx);
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}
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jsobject *js_newcompartment(jscontext *ctx, void *win_priv, void *doc_priv)
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{
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assert(ctx != NULL);
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/* Pop any active thread off */
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LOG("Yay, new compartment, win_priv=%p, doc_priv=%p", win_priv, doc_priv);
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duk_set_top(ctx->ctx, 0);
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duk_push_thread(ctx->ctx);
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ctx->thread = duk_require_context(ctx->ctx, -1);
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duk_push_int(CTX, 0);
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duk_push_int(CTX, 1);
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duk_push_int(CTX, 2);
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/* Manufacture a Window object */
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/* win_priv is a browser_window, doc_priv is an html content struct */
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duk_push_pointer(CTX, win_priv);
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duk_push_pointer(CTX, doc_priv);
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dukky_create_object(CTX, PROTO_NAME(WINDOW), 2);
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duk_push_global_object(CTX);
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duk_put_prop_string(CTX, -2, PROTO_MAGIC);
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duk_set_global_object(CTX);
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/* Now we need to prepare our node mapping table */
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duk_push_object(CTX);
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duk_put_global_string(CTX, NODE_MAGIC);
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return (jsobject *)ctx;
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}
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static duk_ret_t eval_top_string(duk_context *ctx)
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{
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duk_eval(ctx);
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return 0;
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}
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bool js_exec(jscontext *ctx, const char *txt, size_t txtlen)
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{
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assert(ctx);
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if (txt == NULL || txtlen == 0) return false;
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duk_set_top(CTX, 0);
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duk_push_lstring(CTX, txt, txtlen);
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if (duk_safe_call(CTX, eval_top_string, 1, 1) == DUK_EXEC_ERROR) {
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duk_get_prop_string(CTX, 0, "name");
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duk_get_prop_string(CTX, 0, "message");
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duk_get_prop_string(CTX, 0, "fileName");
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duk_get_prop_string(CTX, 0, "lineNumber");
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duk_get_prop_string(CTX, 0, "stack");
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LOG("Uncaught error in JS: %s: %s", duk_safe_to_string(CTX, 1),
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duk_safe_to_string(CTX, 2));
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LOG(" was at: %s line %s", duk_safe_to_string(CTX, 3),
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duk_safe_to_string(CTX, 4));
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LOG(" Stack trace: %s", duk_safe_to_string(CTX, 5));
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return false;
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}
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if (duk_get_top(CTX) == 0) duk_push_boolean(CTX, false);
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LOG("Returning %s", duk_get_boolean(CTX, 0) ? "true" : "false");
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return duk_get_boolean(CTX, 0);
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}
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bool js_fire_event(jscontext *ctx, const char *type, struct dom_document *doc, struct dom_node *target)
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{
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/* La La La */
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LOG("Oh dear, an event: %s", type);
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return true;
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}
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