Source/bindings/v8/V8ThrowException.cpp

/*
 * Copyright (C) 2009 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "config.h"
#include "bindings/v8/V8ThrowException.h"

#include "V8DOMException.h"
#include "bindings/v8/V8Binding.h"
#include "core/dom/DOMException.h"
#include "core/dom/ExceptionCode.h"

namespace WebCore {

static void domExceptionStackGetter(v8::Local<v8::String> name, const v8::PropertyCallbackInfo<v8::Value>& info)
{
    ASSERT(info.Data()->IsObject());
    v8SetReturnValue(info, info.Data()->ToObject()->Get(v8::String::NewSymbol("stack")));
}

static void domExceptionStackSetter(v8::Local<v8::String> name, v8::Local<v8::Value> value, const v8::PropertyCallbackInfo<void>& info)
{
    ASSERT(info.Data()->IsObject());
    info.Data()->ToObject()->Set(v8::String::NewSymbol("stack"), value);
}

v8::Handle<v8::Value> V8ThrowException::createDOMException(int ec, const String& sanitizedMessage, const String& unsanitizedMessage, v8::Isolate* isolate)
{
    if (ec <= 0 || v8::V8::IsExecutionTerminating())
        return v8Undefined();

    ASSERT(ec == SecurityError || unsanitizedMessage.isEmpty());

    // FIXME: Handle other WebIDL exception types.
    if (ec == TypeError)
        return V8ThrowException::createTypeError(sanitizedMessage, isolate);

    RefPtr<DOMException> domException = DOMException::create(ec, sanitizedMessage, unsanitizedMessage);
    v8::Handle<v8::Value> exception = toV8(domException, v8::Handle<v8::Object>(), isolate);

    if (exception.IsEmpty())
        return v8Undefined();

    // Attach an Error object to the DOMException. This is then lazily used to get the stack value.
    v8::Handle<v8::Value> error = v8::Exception::Error(v8String(domException->message(), isolate));
    ASSERT(!error.IsEmpty());
    ASSERT(exception->IsObject());
    exception->ToObject()->SetAccessor(v8::String::NewSymbol("stack"), domExceptionStackGetter, domExceptionStackSetter, error);

    return exception;
}

v8::Handle<v8::Value> V8ThrowException::throwDOMException(int ec, const String& sanitizedMessage, const String& unsanitizedMessage, v8::Isolate* isolate)
{
    ASSERT(ec == SecurityError || unsanitizedMessage.isEmpty());
    v8::Handle<v8::Value> exception = createDOMException(ec, sanitizedMessage, unsanitizedMessage, isolate);
    if (exception.IsEmpty())
        return v8Undefined();

    return V8ThrowException::throwError(exception);
}

v8::Handle<v8::Value> V8ThrowException::createError(V8ErrorType type, const String& message, v8::Isolate* isolate)
{
    switch (type) {
    case v8RangeError:
        return v8::Exception::RangeError(v8String(message, isolate));
    case v8ReferenceError:
        return v8::Exception::ReferenceError(v8String(message, isolate));
    case v8SyntaxError:
        return v8::Exception::SyntaxError(v8String(message, isolate));
    case v8TypeError:
        return v8::Exception::TypeError(v8String(message, isolate));
    case v8GeneralError:
        return v8::Exception::Error(v8String(message, isolate));
    default:
        ASSERT_NOT_REACHED();
        return v8Undefined();
    }
}

v8::Handle<v8::Value> V8ThrowException::throwError(V8ErrorType type, const String& message, v8::Isolate* isolate)
{
    v8::Handle<v8::Value> exception = V8ThrowException::createError(type, message, isolate);
    if (exception.IsEmpty())
        return v8Undefined();
    return V8ThrowException::throwError(exception);
}

v8::Handle<v8::Value> V8ThrowException::createTypeError(const String& message, v8::Isolate* isolate)
{
    return v8::Exception::TypeError(v8String(message.isNull() ? "Type error" : message, isolate));
}

v8::Handle<v8::Value> V8ThrowException::throwTypeError(const String& message, v8::Isolate* isolate)
{
    v8::Handle<v8::Value> exception = V8ThrowException::createTypeError(message, isolate);
    return V8ThrowException::throwError(exception);
}

v8::Handle<v8::Value> V8ThrowException::throwNotEnoughArgumentsError(v8::Isolate* isolate)
{
    v8::Handle<v8::Value> exception = V8ThrowException::createTypeError("Not enough arguments", isolate);
    return V8ThrowException::throwError(exception);
}

v8::Handle<v8::Value> V8ThrowException::throwError(v8::Handle<v8::Value> exception)
{
    if (!v8::V8::IsExecutionTerminating())
        v8::ThrowException(exception);
    return v8::Undefined();
}

} // namespace WebCore