334 lines
7.2 KiB
C
334 lines
7.2 KiB
C
/*
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* Copyright 2012 Vincent Sanders <vince@netsurf-browser.org>
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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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#include "javascript/jsapi.h"
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#include "render/html_internal.h"
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#include "content/content.h"
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#include "javascript/content.h"
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#include "javascript/js.h"
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#include "utils/log.h"
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#include "window.h"
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#include "event.h"
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static JSRuntime *rt; /* global runtime */
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void js_initialise(void)
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{
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/* Create a JS runtime. */
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#if JS_VERSION >= 180
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JS_SetCStringsAreUTF8(); /* we prefer our runtime to be utf-8 */
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#endif
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rt = JS_NewRuntime(8L * 1024L * 1024L);
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JSLOG("New runtime handle %p", rt);
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if (rt != NULL) {
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/* register script content handler */
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javascript_init();
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}
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}
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void js_finalise(void)
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{
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if (rt != NULL) {
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JSLOG("destroying runtime handle %p", rt);
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JS_DestroyRuntime(rt);
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}
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JS_ShutDown();
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}
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/* The error reporter callback. */
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static void js_reportError(JSContext *cx, const char *message, JSErrorReport *report)
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{
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JSLOG("%s:%u:%s",
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report->filename ? report->filename : "<no filename>",
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(unsigned int) report->lineno,
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message);
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}
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jscontext *js_newcontext(void)
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{
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JSContext *cx;
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if (rt == NULL) {
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return NULL;
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}
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cx = JS_NewContext(rt, 8192);
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if (cx == NULL) {
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return NULL;
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}
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JS_SetOptions(cx, JSOPTION_VAROBJFIX | JSOPTION_JIT );
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JS_SetVersion(cx, JSVERSION_LATEST);
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JS_SetErrorReporter(cx, js_reportError);
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/*JS_SetGCZeal(cx, 2); */
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JSLOG("New Context %p", cx);
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return (jscontext *)cx;
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}
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void js_destroycontext(jscontext *ctx)
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{
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JSContext *cx = (JSContext *)ctx;
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if (cx != NULL) {
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JSLOG("Destroying Context %p", cx);
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JS_DestroyContext(cx);
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}
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}
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/** Create new compartment to run scripts within
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*
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* This performs the following actions
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* 1. constructs a new global object by initialising a window class
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* 2. Instantiate the global a window object
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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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JSContext *cx = (JSContext *)ctx;
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JSObject *window_proto;
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JSObject *window;
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if (cx == NULL) {
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return NULL;
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}
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window_proto = jsapi_InitClass_Window(cx, NULL);
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if (window_proto == NULL) {
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JSLOG("Unable to initialise window class");
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return NULL;
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}
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window = jsapi_new_Window(cx, window_proto, NULL, win_priv, doc_priv);
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return (jsobject *)window;
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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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JSContext *cx = (JSContext *)ctx;
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jsval rval;
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/* JSLOG("%p \"%s\"",cx ,txt); */
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if (ctx == NULL) {
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return false;
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}
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if (txt == NULL) {
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return false;
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}
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if (txtlen == 0) {
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return false;
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}
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if (JS_EvaluateScript(cx,
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JS_GetGlobalObject(cx),
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txt, txtlen,
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"<head>", 0, &rval) == JS_TRUE) {
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return true;
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}
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return false;
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}
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dom_exception _dom_event_create(dom_document *doc, dom_event **evt);
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#define dom_event_create(d, e) _dom_event_create((dom_document *)(d), (dom_event **) (e))
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bool js_fire_event(jscontext *ctx, const char *type, dom_document *doc, dom_node *target)
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{
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JSContext *cx = (JSContext *)ctx;
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dom_node *node = target;
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JSObject *jsevent;
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jsval rval;
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jsval argv[1];
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JSBool ret = JS_TRUE;
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dom_exception exc;
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dom_event *event;
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dom_string *type_dom;
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if (cx == NULL) {
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return false;
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}
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if (node == NULL) {
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/* deliver manufactured event to window */
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JSLOG("Dispatching event %s at window", type);
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/* create and initialise and event object */
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exc = dom_string_create((unsigned char*)type,
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strlen(type),
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&type_dom);
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if (exc != DOM_NO_ERR) {
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return false;
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}
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exc = dom_event_create(doc, &event);
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if (exc != DOM_NO_ERR) {
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return false;
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}
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exc = dom_event_init(event, type_dom, false, false);
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dom_string_unref(type_dom);
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if (exc != DOM_NO_ERR) {
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return false;
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}
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jsevent = jsapi_new_Event(cx, NULL, NULL, event);
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if (jsevent == NULL) {
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return false;
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}
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/* dispatch event at the window object */
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argv[0] = OBJECT_TO_JSVAL(jsevent);
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ret = JS_CallFunctionName(cx,
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JS_GetGlobalObject(cx),
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"dispatchEvent",
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1,
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argv,
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&rval);
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} else {
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JSLOG("Dispatching event %s at %p", type, node);
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/* create and initialise and event object */
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exc = dom_string_create((unsigned char*)type,
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strlen(type),
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&type_dom);
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if (exc != DOM_NO_ERR) {
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return false;
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}
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exc = dom_event_create(doc, &event);
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if (exc != DOM_NO_ERR) {
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return false;
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}
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exc = dom_event_init(event, type_dom, true, true);
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dom_string_unref(type_dom);
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if (exc != DOM_NO_ERR) {
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return false;
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}
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dom_event_target_dispatch_event(node, event, &ret);
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}
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if (ret == JS_TRUE) {
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return true;
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}
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return false;
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}
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struct js_dom_event_private {
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JSContext *cx; /* javascript context */
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jsval funcval; /* javascript function to call */
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struct dom_node *node; /* dom node event listening on */
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dom_string *type; /* event type */
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dom_event_listener *listener; /* the listener containing this */
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};
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static void
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js_dom_event_listener(struct dom_event *event, void *pw)
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{
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struct js_dom_event_private *private = pw;
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jsval event_argv[1];
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jsval event_rval;
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JSObject *jsevent;
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JSLOG("WOOT dom event with %p", private);
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if (!JSVAL_IS_VOID(private->funcval)) {
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jsevent = jsapi_new_Event(private->cx, NULL, NULL, event);
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if (jsevent != NULL) {
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/* dispatch event at the window object */
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event_argv[0] = OBJECT_TO_JSVAL(jsevent);
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JS_CallFunctionValue(private->cx,
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NULL,
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private->funcval,
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1,
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event_argv,
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&event_rval);
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}
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}
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}
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/* add a listener to a dom node
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*
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* 1. Create a dom_event_listener From a handle_event function pointer
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* and a private word In a document context
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*
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* 2. Register for your events on a target (dom nodes are targets)
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* dom_event_target_add_event_listener(node, evt_name, listener,
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* capture_or_not)
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*
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*/
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bool
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js_dom_event_add_listener(jscontext *ctx,
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struct dom_document *document,
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struct dom_node *node,
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struct dom_string *event_type_dom,
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void *js_funcval)
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{
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JSContext *cx = (JSContext *)ctx;
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dom_exception exc;
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struct js_dom_event_private *private;
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private = malloc(sizeof(struct js_dom_event_private));
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if (private == NULL) {
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return false;
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}
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exc = dom_event_listener_create(document,
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js_dom_event_listener,
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private,
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&private->listener);
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if (exc != DOM_NO_ERR) {
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return false;
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}
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private->cx = cx;
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private->funcval = *(jsval *)js_funcval;
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private->node = node;
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private->type = event_type_dom;
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JSLOG("adding %p to listener", private);
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JSAPI_ADD_VALUE_ROOT(cx, &private->funcval);
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exc = dom_event_target_add_event_listener(private->node,
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private->type,
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private->listener,
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true);
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if (exc != DOM_NO_ERR) {
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JSLOG("failed to add listener");
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JSAPI_REMOVE_VALUE_ROOT(cx, &private->funcval);
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}
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return true;
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}
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