/*

 * Copyright (C) 2008 Apple 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. ``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

 * 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"

#if ENABLE(VIDEO)

#include "MediaDocument.h"

#include "DocumentLoader.h"

#include "EventNames.h"

#include "Frame.h"

#include "FrameLoaderClient.h"

#include "HTMLEmbedElement.h"

#include "HTMLNames.h"

#include "HTMLVideoElement.h"

#include "KeyboardEvent.h"

#include "MainResourceLoader.h"

#include "NodeList.h"

#include "RawDataDocumentParser.h"

namespace WebCore {

using namespace HTMLNames;

// FIXME: Share more code with PluginDocumentParser.

class MediaDocumentParser : public RawDataDocumentParser {

public:

    MediaDocumentParser(Document* document)

        : RawDataDocumentParser(document)

        , m_mediaElement(0)

    {

    }

private:

    virtual void appendBytes(DocumentWriter*, const char*, int, bool);

    void createDocumentStructure();

    HTMLMediaElement* m_mediaElement;

};

void MediaDocumentParser::createDocumentStructure()

{

    ExceptionCode ec;

    RefPtr<Element> rootElement = document()->createElement(htmlTag, false);

    document()->appendChild(rootElement, ec);

    RefPtr<Element> body = document()->createElement(bodyTag, false);

    body->setAttribute(styleAttr, "background-color: rgb(38,38,38);");

    rootElement->appendChild(body, ec);

    RefPtr<Element> mediaElement = document()->createElement(videoTag, false);

    m_mediaElement = static_cast<HTMLVideoElement*>(mediaElement.get());

    m_mediaElement->setAttribute(controlsAttr, "");

    m_mediaElement->setAttribute(autoplayAttr, "");

    m_mediaElement->setAttribute(styleAttr, "margin: auto; position: absolute; top: 0; right: 0; bottom: 0; left: 0;");

    m_mediaElement->setAttribute(nameAttr, "media");

    m_mediaElement->setSrc(document()->url());

    body->appendChild(mediaElement, ec);

    Frame* frame = document()->frame();

    if (!frame)

        return;

    frame->loader()->activeDocumentLoader()->mainResourceLoader()->setShouldBufferData(false);

}

void MediaDocumentParser::appendBytes(DocumentWriter*, const char*, int, bool)

{

    ASSERT(!m_mediaElement);

    if (m_mediaElement)

        return;

    createDocumentStructure();

    finish();

}

MediaDocument::MediaDocument(Frame* frame, const KURL& url)

    : HTMLDocument(frame, url)

    , m_replaceMediaElementTimer(this, &MediaDocument::replaceMediaElementTimerFired)

{

    setParseMode(Compat);

}

MediaDocument::~MediaDocument()

{

    ASSERT(!m_replaceMediaElementTimer.isActive());

}

DocumentParser* MediaDocument::createParser()

{

    return new MediaDocumentParser(this);

}

void MediaDocument::defaultEventHandler(Event* event)

{

    // Match the default Quicktime plugin behavior to allow 

    // clicking and double-clicking to pause and play the media.

    Node* targetNode = event->target()->toNode();

    if (targetNode && targetNode->hasTagName(videoTag)) {

        HTMLVideoElement* video = static_cast<HTMLVideoElement*>(targetNode);

        if (event->type() == eventNames().clickEvent) {

            if (!video->canPlay()) {

                video->pause(event->fromUserGesture());

                event->setDefaultHandled();

            }

        } else if (event->type() == eventNames().dblclickEvent) {

            if (video->canPlay()) {

                video->play(event->fromUserGesture());

                event->setDefaultHandled();

            }

        }

    }

    if (event->type() == eventNames().keydownEvent && event->isKeyboardEvent()) {

        HTMLVideoElement* video = 0;

        if (targetNode) {

            if (targetNode->hasTagName(videoTag))

                video = static_cast<HTMLVideoElement*>(targetNode);

            else {

                RefPtr<NodeList> nodeList = targetNode->getElementsByTagName("video");

                if (nodeList.get()->length() > 0)

                    video = static_cast<HTMLVideoElement*>(nodeList.get()->item(0));

            }

        }

        if (video) {

            KeyboardEvent* keyboardEvent = static_cast<KeyboardEvent*>(event);

            if (keyboardEvent->keyIdentifier() == "U+0020") { // space

                if (video->paused()) {

                    if (video->canPlay())

                        video->play(event->fromUserGesture());

                } else

                    video->pause(event->fromUserGesture());

                event->setDefaultHandled();

            }

        }

    }

}

void MediaDocument::mediaElementSawUnsupportedTracks()

{

    // The HTMLMediaElement was told it has something that the underlying 

    // MediaPlayer cannot handle so we should switch from <video> to <embed> 

    // and let the plugin handle this. Don't do it immediately as this 

    // function may be called directly from a media engine callback, and 

    // replaceChild will destroy the element, media player, and media engine.

    m_replaceMediaElementTimer.startOneShot(0);

}

void MediaDocument::replaceMediaElementTimerFired(Timer<MediaDocument>*)

{

    HTMLElement* htmlBody = body();

    if (!htmlBody)

        return;

    // Set body margin width and height to 0 as that is what a PluginDocument uses.

    htmlBody->setAttribute(marginwidthAttr, "0");

    htmlBody->setAttribute(marginheightAttr, "0");

    RefPtr<NodeList> nodeList = htmlBody->getElementsByTagName("video");

    if (nodeList.get()->length() > 0) {

        HTMLVideoElement* videoElement = static_cast<HTMLVideoElement*>(nodeList.get()->item(0));

        RefPtr<Element> element = Document::createElement(embedTag, false);

        HTMLEmbedElement* embedElement = static_cast<HTMLEmbedElement*>(element.get());

        embedElement->setAttribute(widthAttr, "100%");

        embedElement->setAttribute(heightAttr, "100%");

        embedElement->setAttribute(nameAttr, "plugin");

        embedElement->setAttribute(srcAttr, url().string());

        embedElement->setAttribute(typeAttr, frame()->loader()->writer()->mimeType());

        ExceptionCode ec;

        videoElement->parent()->replaceChild(embedElement, videoElement, ec);

    }

}

}

#endif