/* * Copyright 2012 Vincent Sanders * * This file is part of NetSurf, http://www.netsurf-browser.org/ * * NetSurf is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * NetSurf is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ #include "javascript/jsapi.h" #include "render/html_internal.h" #include "content/content.h" #include "javascript/content.h" #include "javascript/js.h" #include "utils/log.h" #include "window.h" #include "event.h" static JSRuntime *rt; /* global runtime */ void js_initialise(void) { /* Create a JS runtime. */ #if JS_VERSION >= 180 JS_SetCStringsAreUTF8(); /* we prefer our runtime to be utf-8 */ #endif rt = JS_NewRuntime(8L * 1024L * 1024L); JSLOG("New runtime handle %p", rt); if (rt != NULL) { /* register script content handler */ javascript_init(); } } void js_finalise(void) { if (rt != NULL) { JSLOG("destroying runtime handle %p", rt); JS_DestroyRuntime(rt); } JS_ShutDown(); } /* The error reporter callback. */ static void js_reportError(JSContext *cx, const char *message, JSErrorReport *report) { JSLOG("%s:%u:%s", report->filename ? report->filename : "", (unsigned int) report->lineno, message); } jscontext *js_newcontext(void) { JSContext *cx; if (rt == NULL) { return NULL; } cx = JS_NewContext(rt, 8192); if (cx == NULL) { return NULL; } JS_SetOptions(cx, JSOPTION_VAROBJFIX | JSOPTION_JIT ); JS_SetVersion(cx, JSVERSION_LATEST); JS_SetErrorReporter(cx, js_reportError); /*JS_SetGCZeal(cx, 2); */ JSLOG("New Context %p", cx); return (jscontext *)cx; } void js_destroycontext(jscontext *ctx) { JSContext *cx = (JSContext *)ctx; if (cx != NULL) { JSLOG("Destroying Context %p", cx); JS_DestroyContext(cx); } } /** Create new compartment to run scripts within * * This performs the following actions * 1. constructs a new global object by initialising a window class * 2. Instantiate the global a window object */ jsobject *js_newcompartment(jscontext *ctx, void *win_priv, void *doc_priv) { JSContext *cx = (JSContext *)ctx; JSObject *window_proto; JSObject *window; if (cx == NULL) { return NULL; } window_proto = jsapi_InitClass_Window(cx, NULL); if (window_proto == NULL) { JSLOG("Unable to initialise window class"); return NULL; } window = jsapi_new_Window(cx, window_proto, NULL, win_priv, doc_priv); return (jsobject *)window; } bool js_exec(jscontext *ctx, const char *txt, size_t txtlen) { JSContext *cx = (JSContext *)ctx; jsval rval; /* JSLOG("%p \"%s\"",cx ,txt); */ if (ctx == NULL) { return false; } if (txt == NULL) { return false; } if (txtlen == 0) { return false; } if (JS_EvaluateScript(cx, JS_GetGlobalObject(cx), txt, txtlen, "", 0, &rval) == JS_TRUE) { return true; } return false; } dom_exception _dom_event_create(dom_document *doc, dom_event **evt); #define dom_event_create(d, e) _dom_event_create((dom_document *)(d), (dom_event **) (e)) bool js_fire_event(jscontext *ctx, const char *type, dom_document *doc, dom_node *target) { JSContext *cx = (JSContext *)ctx; dom_node *node = target; JSObject *jsevent; jsval rval; jsval argv[1]; JSBool ret = JS_TRUE; dom_exception exc; dom_event *event; dom_string *type_dom; if (cx == NULL) { return false; } if (node == NULL) { /* deliver manufactured event to window */ JSLOG("Dispatching event %s at window", type); /* create and initialise and event object */ exc = dom_string_create((unsigned char*)type, strlen(type), &type_dom); if (exc != DOM_NO_ERR) { return false; } exc = dom_event_create(doc, &event); if (exc != DOM_NO_ERR) { return false; } exc = dom_event_init(event, type_dom, false, false); dom_string_unref(type_dom); if (exc != DOM_NO_ERR) { return false; } jsevent = jsapi_new_Event(cx, NULL, NULL, event); if (jsevent == NULL) { return false; } /* dispatch event at the window object */ argv[0] = OBJECT_TO_JSVAL(jsevent); ret = JS_CallFunctionName(cx, JS_GetGlobalObject(cx), "dispatchEvent", 1, argv, &rval); } else { JSLOG("Dispatching event %s at %p", type, node); /* create and initialise and event object */ exc = dom_string_create((unsigned char*)type, strlen(type), &type_dom); if (exc != DOM_NO_ERR) { return false; } exc = dom_event_create(doc, &event); if (exc != DOM_NO_ERR) { return false; } exc = dom_event_init(event, type_dom, true, true); dom_string_unref(type_dom); if (exc != DOM_NO_ERR) { return false; } dom_event_target_dispatch_event(node, event, &ret); } if (ret == JS_TRUE) { return true; } return false; } struct js_dom_event_private { JSContext *cx; /* javascript context */ jsval funcval; /* javascript function to call */ struct dom_node *node; /* dom node event listening on */ dom_string *type; /* event type */ dom_event_listener *listener; /* the listener containing this */ }; static void js_dom_event_listener(struct dom_event *event, void *pw) { struct js_dom_event_private *private = pw; jsval event_argv[1]; jsval event_rval; JSObject *jsevent; JSLOG("WOOT dom event with %p", private); if (!JSVAL_IS_VOID(private->funcval)) { jsevent = jsapi_new_Event(private->cx, NULL, NULL, event); if (jsevent != NULL) { /* dispatch event at the window object */ event_argv[0] = OBJECT_TO_JSVAL(jsevent); JS_CallFunctionValue(private->cx, NULL, private->funcval, 1, event_argv, &event_rval); } } } /* add a listener to a dom node * * 1. Create a dom_event_listener From a handle_event function pointer * and a private word In a document context * * 2. Register for your events on a target (dom nodes are targets) * dom_event_target_add_event_listener(node, evt_name, listener, * capture_or_not) * */ bool js_dom_event_add_listener(jscontext *ctx, struct dom_document *document, struct dom_node *node, struct dom_string *event_type_dom, void *js_funcval) { JSContext *cx = (JSContext *)ctx; dom_exception exc; struct js_dom_event_private *private; private = malloc(sizeof(struct js_dom_event_private)); if (private == NULL) { return false; } exc = dom_event_listener_create(document, js_dom_event_listener, private, &private->listener); if (exc != DOM_NO_ERR) { return false; } private->cx = cx; private->funcval = *(jsval *)js_funcval; private->node = node; private->type = event_type_dom; JSLOG("adding %p to listener", private); JSAPI_ADD_VALUE_ROOT(cx, &private->funcval); exc = dom_event_target_add_event_listener(private->node, private->type, private->listener, true); if (exc != DOM_NO_ERR) { JSLOG("failed to add listener"); JSAPI_REMOVE_VALUE_ROOT(cx, &private->funcval); } return true; }