/*
 * Copyright (C) 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
 * Copyright (C) 2011 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 COMPUTER, 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 COMPUTER, 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 "MediaControlRootElementChromium.h"

#include "MediaControlElements.h"
#include "MouseEvent.h"
#include "Page.h"
#include "RenderTheme.h"

using namespace std;

namespace WebCore {

MediaControlRootElementChromium::MediaControlRootElementChromium(HTMLMediaElement* mediaElement)
    : MediaControls(mediaElement)
    , m_mediaElement(mediaElement)
    , m_playButton(0)
    , m_currentTimeDisplay(0)
    , m_timeline(0)
    , m_timelineContainer(0)
    , m_panelMuteButton(0)
    , m_volumeSlider(0)
    , m_volumeSliderContainer(0)
    , m_panel(0)
    , m_opaque(true)
    , m_isMouseOverControls(false)
{
}

PassRefPtr<MediaControls> MediaControls::create(HTMLMediaElement* mediaElement)
{
    return MediaControlRootElementChromium::create(mediaElement);
}

PassRefPtr<MediaControlRootElementChromium> MediaControlRootElementChromium::create(HTMLMediaElement* mediaElement)
{
    if (!mediaElement->document()->page())
        return 0;

    RefPtr<MediaControlRootElementChromium> controls = adoptRef(new MediaControlRootElementChromium(mediaElement));

    RefPtr<MediaControlPanelElement> panel = MediaControlPanelElement::create(mediaElement);

    ExceptionCode ec;

    RefPtr<MediaControlPlayButtonElement> playButton = MediaControlPlayButtonElement::create(mediaElement);
    controls->m_playButton = playButton.get();
    panel->appendChild(playButton.release(), ec, true);
    if (ec)
        return 0;

    RefPtr<MediaControlTimelineContainerElement> timelineContainer = MediaControlTimelineContainerElement::create(mediaElement);

    RefPtr<MediaControlTimelineElement> timeline = MediaControlTimelineElement::create(mediaElement, controls.get());
    controls->m_timeline = timeline.get();
    timelineContainer->appendChild(timeline.release(), ec, true);
    if (ec)
        return 0;

    RefPtr<MediaControlCurrentTimeDisplayElement> currentTimeDisplay = MediaControlCurrentTimeDisplayElement::create(mediaElement);
    controls->m_currentTimeDisplay = currentTimeDisplay.get();
    timelineContainer->appendChild(currentTimeDisplay.release(), ec, true);
    if (ec)
        return 0;

    controls->m_timelineContainer = timelineContainer.get();
    panel->appendChild(timelineContainer.release(), ec, true);
    if (ec)
        return 0;

    RefPtr<MediaControlPanelMuteButtonElement> panelMuteButton = MediaControlPanelMuteButtonElement::create(mediaElement, controls.get());
    controls->m_panelMuteButton = panelMuteButton.get();
    panel->appendChild(panelMuteButton.release(), ec, true);
    if (ec)
        return 0;

    RefPtr<MediaControlVolumeSliderContainerElement> volumeSliderContainer = MediaControlVolumeSliderContainerElement::create(mediaElement);

    RefPtr<MediaControlVolumeSliderElement> slider = MediaControlVolumeSliderElement::create(mediaElement);
    controls->m_volumeSlider = slider.get();
    volumeSliderContainer->appendChild(slider.release(), ec, true);
    if (ec)
        return 0;

    controls->m_volumeSliderContainer = volumeSliderContainer.get();
    panel->appendChild(volumeSliderContainer.release(), ec, true);
    if (ec)
        return 0;

    controls->m_panel = panel.get();
    controls->appendChild(panel.release(), ec, true);
    if (ec)
        return 0;

    return controls.release();
}

void MediaControlRootElementChromium::show()
{
    m_panel->show();
}

void MediaControlRootElementChromium::hide()
{
    m_panel->hide();
}

static const String& webkitTransitionString()
{
    DEFINE_STATIC_LOCAL(String, s, ("-webkit-transition"));
    return s;
}

static const String& opacityString()
{
    DEFINE_STATIC_LOCAL(String, s, ("opacity"));
    return s;
}

void MediaControlRootElementChromium::makeOpaque()
{
    if (m_opaque)
        return;

    DEFINE_STATIC_LOCAL(String, transitionValue, ());
    if (transitionValue.isNull())
        transitionValue = String::format("opacity %.1gs", document()->page()->theme()->mediaControlsFadeInDuration());
    DEFINE_STATIC_LOCAL(String, opacityValue, ("1"));

    ExceptionCode ec;
    // FIXME: Make more efficient <http://webkit.org/b/58157>
    m_panel->style()->setProperty(webkitTransitionString(), transitionValue, ec);
    m_panel->style()->setProperty(opacityString(), opacityValue, ec);
    m_opaque = true;
}

void MediaControlRootElementChromium::makeTransparent()
{
    if (!m_opaque)
        return;

    DEFINE_STATIC_LOCAL(String, transitionValue, ());
    if (transitionValue.isNull())
        transitionValue = String::format("opacity %.1gs", document()->page()->theme()->mediaControlsFadeOutDuration());
    DEFINE_STATIC_LOCAL(String, opacityValue, ("0"));

    ExceptionCode ec;
    // FIXME: Make more efficient <http://webkit.org/b/58157>
    m_panel->style()->setProperty(webkitTransitionString(), transitionValue, ec);
    m_panel->style()->setProperty(opacityString(), opacityValue, ec);
    m_opaque = false;
}

void MediaControlRootElementChromium::reset()
{
    Page* page = document()->page();
    if (!page)
        return;

    updateStatusDisplay();

    float duration = m_mediaElement->duration();
    m_timeline->setDuration(duration);
    m_timelineContainer->show();
    m_timeline->setPosition(m_mediaElement->currentTime());
    updateTimeDisplay();

    m_panelMuteButton->show();

    if (m_volumeSlider)
        m_volumeSlider->setVolume(m_mediaElement->volume());

    makeOpaque();
}

void MediaControlRootElementChromium::playbackStarted()
{
    m_playButton->updateDisplayType();
    m_timeline->setPosition(m_mediaElement->currentTime());
    updateTimeDisplay();
}

void MediaControlRootElementChromium::playbackProgressed()
{
    m_timeline->setPosition(m_mediaElement->currentTime());
    updateTimeDisplay();

    if (!m_isMouseOverControls && m_mediaElement->hasVideo())
        makeTransparent();
}

void MediaControlRootElementChromium::playbackStopped()
{
    m_playButton->updateDisplayType();
    m_timeline->setPosition(m_mediaElement->currentTime());
    updateTimeDisplay();
    makeOpaque();
}

void MediaControlRootElementChromium::updateTimeDisplay()
{
    float now = m_mediaElement->currentTime();
    float duration = m_mediaElement->duration();

    Page* page = document()->page();
    if (!page)
        return;

    // Allow the theme to format the time.
    ExceptionCode ec;
    m_currentTimeDisplay->setInnerText(page->theme()->formatMediaControlsCurrentTime(now, duration), ec);
    m_currentTimeDisplay->setCurrentValue(now);
}

void MediaControlRootElementChromium::reportedError()
{
    Page* page = document()->page();
    if (!page)
        return;

    m_timelineContainer->hide();
    m_panelMuteButton->hide();
    m_volumeSliderContainer->hide();
}

void MediaControlRootElementChromium::updateStatusDisplay()
{
}

bool MediaControlRootElementChromium::shouldHideControls()
{
    return !m_panel->hovered();
}

void MediaControlRootElementChromium::loadedMetadata()
{
    reset();
}

bool MediaControlRootElementChromium::containsRelatedTarget(Event* event)
{
    if (!event->isMouseEvent())
        return false;
    EventTarget* relatedTarget = static_cast<MouseEvent*>(event)->relatedTarget();
    if (!relatedTarget)
        return false;
    return contains(relatedTarget->toNode());
}

void MediaControlRootElementChromium::defaultEventHandler(Event* event)
{
    MediaControls::defaultEventHandler(event);

    if (event->type() == eventNames().mouseoverEvent) {
        if (!containsRelatedTarget(event)) {
            m_isMouseOverControls = true;
            if (!m_mediaElement->canPlay())
                makeOpaque();
        }
    } else if (event->type() == eventNames().mouseoutEvent) {
        if (!containsRelatedTarget(event))
            m_isMouseOverControls = false;
    }
}

void MediaControlRootElementChromium::changedClosedCaptionsVisibility()
{
}

void MediaControlRootElementChromium::changedMute()
{
    m_panelMuteButton->changedMute();
}

void MediaControlRootElementChromium::changedVolume()
{
    m_volumeSlider->setVolume(m_mediaElement->volume());
}

void MediaControlRootElementChromium::enteredFullscreen()
{
}

void MediaControlRootElementChromium::exitedFullscreen()
{
}

void MediaControlRootElementChromium::showVolumeSlider()
{
    if (!m_mediaElement->hasAudio())
        return;

    m_volumeSliderContainer->show();
}

const AtomicString& MediaControlRootElementChromium::shadowPseudoId() const
{
    DEFINE_STATIC_LOCAL(AtomicString, id, ("-webkit-media-controls"));
    return id;
}

}

#endif
