void IGUIObject::RegisterScriptHandler(const CStr& Action, const CStr& Code, CGUI* pGUI)
{
if(!GetGUI())
throw PSERROR_GUI_OperationNeedsGUIObject();
JSContext* cx = pGUI->GetScriptInterface()->GetContext();
JSAutoRequest rq(cx);
JS::RootedValue globalVal(cx, pGUI->GetGlobalObject());
JS::RootedObject globalObj(cx, &globalVal.toObject());
const int paramCount = 1;
const char* paramNames[paramCount] = { "mouse" };
// Location to report errors from
CStr CodeName = GetName()+" "+Action;
// Generate a unique name
static int x = 0;
char buf[64];
sprintf_s(buf, ARRAY_SIZE(buf), "__eventhandler%d (%s)", x++, Action.c_str());
JS::CompileOptions options(cx);
options.setFileAndLine(CodeName.c_str(), 0);
options.setCompileAndGo(true);
JS::RootedFunction func(cx, JS_CompileFunction(cx, globalObj,
buf, paramCount, paramNames, Code.c_str(), Code.length(), options));
if (!func)
return; // JS will report an error message
JS::RootedObject funcObj(cx, JS_GetFunctionObject(func));
SetScriptHandler(Action, funcObj);
}
//---------------------------------------------------------------------------
inline JSBool ejs_throw_error(JSContext *cx, JSObject *obj, const char *msg) {
JSString *jsstr;
// if we get errors during error reporting we report those
if (((jsstr = JS_NewStringCopyZ(cx, msg))) &&
(JS_AddNamedRoot(cx, &jsstr, "jsstr"))) {
jsval dummy;
// We can't use JS_EvaluateScript since the stack would be wrong
JSFunction *func;
JSObject *fobj;
const char *fbody = "throw new Error(msg);";
const char *argnames[] = { "msg" };
if ((func = JS_CompileFunction(cx, obj, NULL,
1, argnames,
fbody, strlen(fbody),
NULL, 0))) {
// root function
if (((fobj = JS_GetFunctionObject(func))) &&
(JS_AddNamedRoot(cx, &fobj, "fobj"))) {
jsval args[] = { STRING_TO_JSVAL(jsstr) };
JS_CallFunction(cx, obj, func, 1, args, &dummy);
JS_RemoveRoot(cx, &fobj);
}
}
JS_RemoveRoot(cx, &jsstr);
}
return JS_FALSE;
}//---------------------------------------------------------------------------
int
spidermonkey_eval_boolback(struct ecmascript_interpreter *interpreter,
struct string *code)
{
JSContext *ctx;
JSFunction *fun;
jsval rval;
int ret;
assert(interpreter);
if (!js_module_init_ok) return 0;
ctx = interpreter->backend_data;
interpreter->ret = NULL;
fun = JS_CompileFunction(ctx, NULL, "", 0, NULL, code->source,
code->length, "", 0);
if (!fun)
return -1;
#if defined(CONFIG_ECMASCRIPT_SMJS_HEARTBEAT)
interpreter->heartbeat = add_heartbeat(interpreter);
#elif defined(HAVE_JS_SETBRANCHCALLBACK)
setup_safeguard(interpreter, ctx);
#endif
ret = JS_CallFunction(ctx, NULL, fun, 0, NULL, &rval);
#if defined(CONFIG_ECMASCRIPT_SMJS_HEARTBEAT)
done_heartbeat(interpreter->heartbeat);
#endif
if (ret == 2) { /* onClick="history.back()" */
return 0;
}
if (ret == JS_FALSE) {
return -1;
}
if (JSVAL_IS_VOID(rval)) {
/* Undefined value. */
return -1;
}
return jsval_to_boolean(ctx, &rval);
}
/*
* See:
* https://bugzilla.mozilla.org/show_bug.cgi?id=166436
* https://bugzilla.mozilla.org/show_bug.cgi?id=215173
*
* Very surprisingly, jsapi.h lacks any way to "throw new Error()"
*
* So here is an awful hack inspired by
* http://egachine.berlios.de/embedding-sm-best-practice/embedding-sm-best-practice.html#error-handling
*/
static void
gjs_throw_valist(JSContext *context,
const char *format,
va_list args)
{
char *s;
jsval retval;
jsval argv[1];
JSFunction *func;
const char *body;
JSBool result;
const char *names[] = { "message" };
guint options;
s = g_strdup_vprintf(format, args);
JS_BeginRequest(context);
if (JS_IsExceptionPending(context)) {
/* Often it's unclear whether a given jsapi.h function
* will throw an exception, so we will throw ourselves
* "just in case"; in those cases, we don't want to
* overwrite an exception that already exists.
* (Do log in case our second exception adds more info,
* but don't log as topic ERROR because if the exception is
* caught we don't want an ERROR in the logs.)
*/
gjs_debug(GJS_DEBUG_CONTEXT,
"Ignoring second exception: '%s'",
s);
g_free(s);
return;
}
result = JS_FALSE;
JS_EnterLocalRootScope(context);
if (!gjs_string_from_utf8(context, s, -1, &argv[0])) {
JS_ReportError(context, "Failed to copy exception string");
goto out;
}
body = "throw new Error(message);";
func = JS_CompileFunction(context,
JS_GetGlobalObject(context), /* parent object (scope chain) */
NULL, /* name of function if we wanted to define it in parent */
1, /* nargs */
&names[0], /* array of arg names if we had args */
body,
strlen(body),
"gjs_throw", /* file */
0); /* line */
if (func == NULL) {
JS_ReportError(context, "Failed to compile function");
goto out;
}
/* we need JS_CallFunctionValue() to leave the exception set */
options = JS_GetOptions(context);
if (!(options & JSOPTION_DONT_REPORT_UNCAUGHT)) {
JS_SetOptions(context, options | JSOPTION_DONT_REPORT_UNCAUGHT);
}
retval = JSVAL_VOID;
/* note the return value is whether function succeeded, which it shouldn't, since it
* throws...
*/
JS_CallFunctionValue(context,
JS_GetGlobalObject(context),
OBJECT_TO_JSVAL(JS_GetFunctionObject(func)),
1, &argv[0],
&retval);
if (!(options & JSOPTION_DONT_REPORT_UNCAUGHT)) {
JS_SetOptions(context, options);
}
if (!JS_IsExceptionPending(context)) {
JS_ReportError(context,
"Failed to set exception by calling our exception-setting function");
goto out;
}
result = JS_TRUE;
out:
JS_LeaveLocalRootScope(context);
if (!result) {
/* try just reporting it to error handler? should not
* happen though pretty much
*/
JS_ReportError(context,
"Failed to throw exception '%s'",
s);
}
g_free(s);
JS_EndRequest(context);
}
JSFunction * _compileFunction( const char * raw , JSObject * assoc , const char *& gcName ) {
if ( ! assoc )
assoc = JS_GetGlobalObject( _context );
while (isspace(*raw)) {
raw++;
}
stringstream fname;
fname << "cf_";
static int fnum = 1;
fname << "_" << fnum++ << "_";
if ( ! hasFunctionIdentifier( raw ) ) {
string s = raw;
if ( isSimpleStatement( s ) ) {
s = "return " + s;
}
gcName = "cf anon";
fname << "anon";
return JS_CompileFunction( _context , assoc , fname.str().c_str() , 0 , 0 , s.c_str() , strlen( s.c_str() ) , "nofile_a" , 0 );
}
string code = raw;
size_t start = code.find( '(' );
assert( start != string::npos );
fname << "_f_" << trim( code.substr( 9 , start - 9 ) );
code = code.substr( start + 1 );
size_t end = code.find( ')' );
assert( end != string::npos );
string paramString = trim( code.substr( 0 , end ) );
code = code.substr( end + 1 );
vector<string> params;
while ( paramString.size() ) {
size_t c = paramString.find( ',' );
if ( c == string::npos ) {
params.push_back( paramString );
break;
}
params.push_back( trim( paramString.substr( 0 , c ) ) );
paramString = trim( paramString.substr( c + 1 ) );
paramString = trim( paramString );
}
boost::scoped_array<const char *> paramArray (new const char*[params.size()]);
for ( size_t i=0; i<params.size(); i++ )
paramArray[i] = params[i].c_str();
JSFunction * func = JS_CompileFunction( _context , assoc , fname.str().c_str() , params.size() , paramArray.get() , code.c_str() , strlen( code.c_str() ) , "nofile_b" , 0 );
if ( ! func ) {
cout << "compile failed for: " << raw << endl;
return 0;
}
gcName = "cf normal";
return func;
}
