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Bug 870043 - Add support for scripted operation callbacks in XPCShell. r=mrbkap

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This commit is contained in:
Bobby Holley 2013-07-24 15:33:31 -07:00
parent 93442ca1ad
commit 22a7891400
1 changed files with 53 additions and 0 deletions
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53
js/xpconnect/shell/xpcshell.cpp
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@ -812,6 +812,55 @@ File(JSContext *cx, unsigned argc, jsval *vp)
return true;
}
Value sScriptedOperationCallback = UndefinedValue();
static JSBool
XPCShellOperationCallback(JSContext *cx)
{
// If no operation callback was set by script, no-op.
if (sScriptedOperationCallback.isUndefined())
return true;
JSAutoCompartment ac(cx, &sScriptedOperationCallback.toObject());
RootedValue rv(cx);
if (!JS_CallFunctionValue(cx, nullptr, sScriptedOperationCallback,
0, nullptr, rv.address()) || !rv.isBoolean())
{
NS_WARNING("Scripted operation callback failed! Terminating script.");
JS_ClearPendingException(cx);
return false;
}
return rv.toBoolean();
}
static JSBool
SetOperationCallback(JSContext *cx, unsigned argc, jsval *vp)
{
// Sanity-check args.
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
if (args.length() != 1) {
JS_ReportError(cx, "Wrong number of arguments");
return false;
}
// Allow callers to remove the operation callback by passing undefined.
if (args[0].isUndefined()) {
sScriptedOperationCallback = UndefinedValue();
return true;
}
// Otherwise, we should have a callable object.
if (!args[0].isObject() || !JS_ObjectIsCallable(cx, &args[0].toObject())) {
JS_ReportError(cx, "Argument must be callable");
return false;
}
sScriptedOperationCallback = args[0];
return true;
}
static const JSFunctionSpec glob_functions[] = {
JS_FS("print", Print, 0,0),
JS_FS("readline", ReadLine, 1,0),
@ -836,6 +885,7 @@ static const JSFunctionSpec glob_functions[] = {
JS_FS("btoa", Btoa, 1,0),
JS_FS("Blob", Blob, 2,JSFUN_CONSTRUCTOR),
JS_FS("File", File, 2,JSFUN_CONSTRUCTOR),
JS_FS("setOperationCallback", SetOperationCallback, 1,0),
JS_FS_END
};
@ -1410,6 +1460,7 @@ ContextCallback(JSContext *cx, unsigned contextOp)
if (contextOp == JSCONTEXT_NEW) {
JS_SetErrorReporter(cx, XPCShellErrorReporter);
JS_SetOperationCallback(cx, XPCShellOperationCallback);
}
return true;
}
@ -1693,7 +1744,9 @@ main(int argc, char **argv, char **envp)
JS_DefineProperty(cx, glob, "__LOCATION__", JSVAL_VOID,
GetLocationProperty, NULL, 0);
JS_AddValueRoot(cx, &sScriptedOperationCallback);
result = ProcessArgs(cx, glob, argv, argc, &dirprovider);
JS_RemoveValueRoot(cx, &sScriptedOperationCallback);
JS_DropPrincipals(rt, gJSPrincipals);
JS_SetAllNonReservedSlotsToUndefined(cx, glob);