src/third_party/blink/Source/bindings/core/v8/V8ErrorHandler.cpp

/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "config.h"
#include "bindings/core/v8/V8ErrorHandler.h"

#include "bindings/core/v8/ScriptController.h"
#include "bindings/core/v8/V8Binding.h"
#include "bindings/core/v8/V8ErrorEvent.h"
#include "bindings/core/v8/V8HiddenValue.h"
#include "bindings/core/v8/V8ScriptRunner.h"
#include "core/dom/ExecutionContext.h"
#include "core/events/ErrorEvent.h"
#include "core/frame/LocalFrame.h"

namespace blink {

V8ErrorHandler::V8ErrorHandler(v8::Local<v8::Object> listener, bool isInline, ScriptState* scriptState)
    : V8EventListener(listener, isInline, scriptState)
{
}

v8::Local<v8::Value> V8ErrorHandler::callListenerFunction(v8::Handle<v8::Value> jsEvent, Event* event)
{
    if (!event->hasInterface(EventNames::ErrorEvent))
        return V8EventListener::callListenerFunction(jsEvent, event);

    ErrorEvent* errorEvent = static_cast<ErrorEvent*>(event);

    if (errorEvent->world() && errorEvent->world() != &world())
        return v8::Null(isolate());

    v8::Local<v8::Object> listener = getListenerObject(scriptState()->executionContext());
    v8::Local<v8::Value> returnValue;
    if (!listener.IsEmpty() && listener->IsFunction()) {
        v8::Local<v8::Function> callFunction = v8::Local<v8::Function>::Cast(listener);
        v8::Local<v8::Object> thisValue = scriptState()->context()->Global();

        v8::Local<v8::Value> error = V8HiddenValue::getHiddenValue(isolate(), jsEvent->ToObject(), V8HiddenValue::error(isolate()));
        if (error.IsEmpty())
            error = v8::Null(isolate());

        v8::Handle<v8::Value> parameters[5] = { v8String(isolate(), errorEvent->message()), v8String(isolate(), errorEvent->filename()), v8::Integer::New(isolate(), errorEvent->lineno()), v8::Integer::New(isolate(), errorEvent->colno()), error };
        v8::TryCatch tryCatch;
        tryCatch.SetVerbose(true);
        if (scriptState()->executionContext()->isWorkerGlobalScope())
            returnValue = V8ScriptRunner::callFunction(callFunction, scriptState()->executionContext(), thisValue, WTF_ARRAY_LENGTH(parameters), parameters, isolate());
        else
            returnValue = ScriptController::callFunction(scriptState()->executionContext(), callFunction, thisValue, WTF_ARRAY_LENGTH(parameters), parameters, isolate());
    }
    return returnValue;
}

// static
void V8ErrorHandler::storeExceptionOnErrorEventWrapper(v8::Isolate* isolate, ErrorEvent* event, v8::Handle<v8::Value> data, v8::Handle<v8::Object> creationContext)
{
    v8::Local<v8::Value> wrappedEvent = toV8(event, creationContext, isolate);
    if (!wrappedEvent.IsEmpty()) {
        ASSERT(wrappedEvent->IsObject());
        V8HiddenValue::setHiddenValue(isolate, v8::Local<v8::Object>::Cast(wrappedEvent), V8HiddenValue::error(isolate), data);
    }
}

bool V8ErrorHandler::shouldPreventDefault(v8::Local<v8::Value> returnValue)
{
    return returnValue->IsBoolean() && returnValue->BooleanValue();
}

} // namespace blink