Source/core/html/shadow/MediaControlsChromium.cpp

/*
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 * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
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#include "config.h"
#include "core/html/shadow/MediaControlsChromium.h"

#include "bindings/v8/ExceptionState.h"
#include "bindings/v8/ExceptionStatePlaceholder.h"

using namespace std;

namespace WebCore {

MediaControlsChromium::MediaControlsChromium(Document* document)
    : MediaControls(document)
    , m_durationDisplay(0)
    , m_enclosure(0)
{
}

// MediaControls::create() for Android is defined in MediaControlsChromiumAndroid.cpp.
#if !OS(ANDROID)
PassRefPtr<MediaControls> MediaControls::create(Document* document)
{
    return MediaControlsChromium::createControls(document);
}
#endif

PassRefPtr<MediaControlsChromium> MediaControlsChromium::createControls(Document* document)
{
    if (!document->page())
        return 0;

    RefPtr<MediaControlsChromium> controls = adoptRef(new MediaControlsChromium(document));

    if (controls->initializeControls(document))
        return controls.release();

    return 0;
}

bool MediaControlsChromium::initializeControls(Document* document)
{
    // Create an enclosing element for the panel so we can visually offset the controls correctly.
    RefPtr<MediaControlPanelEnclosureElement> enclosure = MediaControlPanelEnclosureElement::create(document);

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

    TrackExceptionState es;

    RefPtr<MediaControlPlayButtonElement> playButton = MediaControlPlayButtonElement::create(document);
    m_playButton = playButton.get();
    panel->appendChild(playButton.release(), es, AttachLazily);
    if (es.hadException())
        return false;

    RefPtr<MediaControlTimelineElement> timeline = MediaControlTimelineElement::create(document, this);
    m_timeline = timeline.get();
    panel->appendChild(timeline.release(), es, AttachLazily);
    if (es.hadException())
        return false;

    RefPtr<MediaControlCurrentTimeDisplayElement> currentTimeDisplay = MediaControlCurrentTimeDisplayElement::create(document);
    m_currentTimeDisplay = currentTimeDisplay.get();
    m_currentTimeDisplay->hide();
    panel->appendChild(currentTimeDisplay.release(), es, AttachLazily);
    if (es.hadException())
        return false;

    RefPtr<MediaControlTimeRemainingDisplayElement> durationDisplay = MediaControlTimeRemainingDisplayElement::create(document);
    m_durationDisplay = durationDisplay.get();
    panel->appendChild(durationDisplay.release(), es, AttachLazily);
    if (es.hadException())
        return false;

    RefPtr<MediaControlPanelMuteButtonElement> panelMuteButton = MediaControlPanelMuteButtonElement::create(document, this);
    m_panelMuteButton = panelMuteButton.get();
    panel->appendChild(panelMuteButton.release(), es, AttachLazily);
    if (es.hadException())
        return false;

    RefPtr<MediaControlPanelVolumeSliderElement> slider = MediaControlPanelVolumeSliderElement::create(document);
    m_volumeSlider = slider.get();
    m_volumeSlider->setClearMutedOnUserInteraction(true);
    panel->appendChild(slider.release(), es, AttachLazily);
    if (es.hadException())
        return false;

    if (document->page()->theme()->supportsClosedCaptioning()) {
        RefPtr<MediaControlToggleClosedCaptionsButtonElement> toggleClosedCaptionsButton = MediaControlToggleClosedCaptionsButtonElement::create(document, this);
        m_toggleClosedCaptionsButton = toggleClosedCaptionsButton.get();
        panel->appendChild(toggleClosedCaptionsButton.release(), es, AttachLazily);
        if (es.hadException())
            return false;
    }

    RefPtr<MediaControlFullscreenButtonElement> fullscreenButton = MediaControlFullscreenButtonElement::create(document);
    m_fullScreenButton = fullscreenButton.get();
    panel->appendChild(fullscreenButton.release(), es, AttachLazily);
    if (es.hadException())
        return false;

    m_panel = panel.get();
    enclosure->appendChild(panel.release(), es, AttachLazily);
    if (es.hadException())
        return false;

    m_enclosure = enclosure.get();
    appendChild(enclosure.release(), es, AttachLazily);
    if (es.hadException())
        return false;

    return true;
}

void MediaControlsChromium::setMediaController(MediaControllerInterface* controller)
{
    if (m_mediaController == controller)
        return;

    MediaControls::setMediaController(controller);

    if (m_durationDisplay)
        m_durationDisplay->setMediaController(controller);
    if (m_enclosure)
        m_enclosure->setMediaController(controller);
}

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

    double duration = m_mediaController->duration();
    m_durationDisplay->setInnerText(page->theme()->formatMediaControlsTime(duration), ASSERT_NO_EXCEPTION);
    m_durationDisplay->setCurrentValue(duration);

    MediaControls::reset();
}

void MediaControlsChromium::playbackStarted()
{
    m_currentTimeDisplay->show();
    m_durationDisplay->hide();

    MediaControls::playbackStarted();
}

void MediaControlsChromium::updateCurrentTimeDisplay()
{
    double now = m_mediaController->currentTime();
    double duration = m_mediaController->duration();

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

    // After seek, hide duration display and show current time.
    if (now > 0) {
        m_currentTimeDisplay->show();
        m_durationDisplay->hide();
    }

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

void MediaControlsChromium::changedMute()
{
    MediaControls::changedMute();

    if (m_mediaController->muted())
        m_volumeSlider->setVolume(0);
    else
        m_volumeSlider->setVolume(m_mediaController->volume());
}

void MediaControlsChromium::createTextTrackDisplay()
{
    if (m_textDisplayContainer)
        return;

    RefPtr<MediaControlTextTrackContainerElement> textDisplayContainer = MediaControlTextTrackContainerElement::create(document());
    m_textDisplayContainer = textDisplayContainer.get();

    if (m_mediaController)
        m_textDisplayContainer->setMediaController(m_mediaController);

    insertTextTrackContainer(textDisplayContainer.release());
}

void MediaControlsChromium::insertTextTrackContainer(PassRefPtr<MediaControlTextTrackContainerElement> textTrackContainer)
{
    // Insert it before the first controller element so it always displays behind the controls.
    // In the Chromium case, that's the enclosure element.
    insertBefore(textTrackContainer, m_enclosure, ASSERT_NO_EXCEPTION, AttachLazily);
}


}