/*

 * 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:

 * 

 *     * Redistributions of source code must retain the above copyright

 * notice, this list of conditions and the following disclaimer.

 *     * 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.

 *     * Neither the name of Google Inc. nor the names of its

 * contributors may be used to endorse or promote products derived from

 * this software without specific prior written permission.

 * 

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT

 * OWNER OR 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

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "config.h"

#include "V8ConsoleMessage.h"

#include "Console.h"

#include "DOMWindow.h"

#include "Frame.h"

#include "OwnPtr.h"

#include "Page.h"

#include "ScriptCallStack.h"

#include "V8Binding.h"

#include "V8Proxy.h"

namespace WebCore {

Vector<V8ConsoleMessage>* V8ConsoleMessage::m_delayedMessages = 0;

V8ConsoleMessage::V8ConsoleMessage(const String& string, const String& sourceID, unsigned lineNumber)

     : m_string(string)

     , m_sourceID(sourceID)

     , m_lineNumber(lineNumber)

{

}

void V8ConsoleMessage::dispatchNow(Page* page)

{

    dispatchNow(page, 0);

}

void V8ConsoleMessage::dispatchLater()

{

    if (!m_delayedMessages) {

        // Allocate a vector for the delayed messages. Will be

        // deallocated when the delayed messages are processed

        // in processDelayed().

        m_delayedMessages = new Vector<V8ConsoleMessage>();

    }

    m_delayedMessages->append(*this);

}

void V8ConsoleMessage::processDelayed()

{

    if (!m_delayedMessages)

        return;

    // Take ownership of the delayed vector to avoid re-entrancy issues.

    OwnPtr<Vector<V8ConsoleMessage> > delayedMessages(m_delayedMessages);

    m_delayedMessages = 0;

    // If we have a delayed vector it cannot be empty.

    ASSERT(!delayedMessages->isEmpty());

    // Add the delayed messages to the page of the active

    // context. If that for some bizarre reason does not

    // exist, we clear the list of delayed messages to avoid

    // posting messages. We still deallocate the vector.

    Frame* frame = V8Proxy::retrieveFrameForEnteredContext();

    if (!frame)

        return;

    Page* page = frame->page();

    if (!page)

        return;

    // Iterate through all the delayed messages and add them

    // to the console.

    const int size = delayedMessages->size();

    for (int i = 0; i < size; ++i)

        delayedMessages->at(i).dispatchNow(page);

}

void V8ConsoleMessage::handler(v8::Handle<v8::Message> message, v8::Handle<v8::Value> data)

{

    // Use the frame where JavaScript is called from.

    Frame* frame = V8Proxy::retrieveFrameForEnteredContext();

    if (!frame)

        return;

    Page* page = frame->page();

    if (!page)

        return;

    v8::Handle<v8::String> errorMessageString = message->Get();

    ASSERT(!errorMessageString.IsEmpty());

    String errorMessage = toWebCoreString(errorMessageString);

    v8::Handle<v8::StackTrace> stackTrace = message->GetStackTrace();

    OwnPtr<ScriptCallStack> callStack;

    // Currently stack trace is only collected when inspector is open.

    if (!stackTrace.IsEmpty() && stackTrace->GetFrameCount() > 0) {

        v8::Local<v8::Context> context = v8::Context::GetEntered();

        ScriptState* scriptState = ScriptState::forContext(context);

        callStack = ScriptCallStack::create(scriptState, stackTrace);

    }

    v8::Handle<v8::Value> resourceName = message->GetScriptResourceName();

    bool useURL = resourceName.IsEmpty() || !resourceName->IsString();

    String resourceNameString = useURL ? frame->document()->url() : toWebCoreString(resourceName);

    V8ConsoleMessage consoleMessage(errorMessage, resourceNameString, message->GetLineNumber());

    consoleMessage.dispatchNow(page, callStack.get());

}

void V8ConsoleMessage::dispatchNow(Page* page, ScriptCallStack* callStack)

{

    ASSERT(page);

    // Process any delayed messages to make sure that messages

    // appear in the right order in the console.

    processDelayed();

    Console* console = page->mainFrame()->domWindow()->console();

    MessageType messageType = callStack ? UncaughtExceptionMessageType : LogMessageType;

    console->addMessage(JSMessageSource, messageType, ErrorMessageLevel, m_string, m_lineNumber, m_sourceID, callStack);

}

} // namespace WebCore