rendermedia.cpp

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
 * Copyright (C) 2007, 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 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 "RenderMedia.h"

#include "CSSStyleSelector.h"
#include "Event.h"
#include "EventNames.h"
#include "FloatConversion.h"
#include "FrameView.h"
#include "GraphicsContext.h"
#include "HTMLMediaElement.h"
#include "HTMLNames.h"
#include "MediaControlElements.h"
#include "MouseEvent.h"
#include "MediaPlayer.h"
#include <wtf/CurrentTime.h>
#include <wtf/MathExtras.h>

using namespace std;

namespace WebCore {

static const double cTimeUpdateRepeatDelay = 0.2;
static const double cOpacityAnimationRepeatDelay = 0.05;
// FIXME get this from style
static const double cOpacityAnimationDuration = 0.1;

RenderMedia::RenderMedia(HTMLMediaElement* video)
    : RenderReplaced(video)
    , m_timeUpdateTimer(this, &RenderMedia::timeUpdateTimerFired)
    , m_opacityAnimationTimer(this, &RenderMedia::opacityAnimationTimerFired)
    , m_mouseOver(false)
    , m_opacityAnimationStartTime(0)
    , m_opacityAnimationFrom(0)
    , m_opacityAnimationTo(1.0f)
    , m_previousVisible(VISIBLE)
{
}

RenderMedia::RenderMedia(HTMLMediaElement* video, const IntSize& intrinsicSize)
    : RenderReplaced(video, intrinsicSize)
    , m_timeUpdateTimer(this, &RenderMedia::timeUpdateTimerFired)
    , m_opacityAnimationTimer(this, &RenderMedia::opacityAnimationTimerFired)
    , m_mouseOver(false)
    , m_opacityAnimationStartTime(0)
    , m_opacityAnimationFrom(0)
    , m_opacityAnimationTo(1.0f)
{
}

RenderMedia::~RenderMedia()
{
}

void RenderMedia::destroy()
{
    if (m_controlsShadowRoot && m_controlsShadowRoot->renderer()) {

        // detach the panel before removing the shadow renderer to prevent a crash in m_controlsShadowRoot->detach() 
        //  when display: style changes
        m_panel->detach();

        removeChild(m_controlsShadowRoot->renderer());
        m_controlsShadowRoot->detach();
        m_controlsShadowRoot = 0;
    }
    RenderReplaced::destroy();
}

HTMLMediaElement* RenderMedia::mediaElement() const
{ 
    return static_cast<HTMLMediaElement*>(node()); 
}

MediaPlayer* RenderMedia::player() const
{
    return mediaElement()->player();
}

void RenderMedia::layout()
{
    IntSize oldSize = contentBoxRect().size();

    RenderReplaced::layout();

    RenderBox* controlsRenderer = m_controlsShadowRoot ? m_controlsShadowRoot->renderBox() : 0;
    if (!controlsRenderer)
        return;
    IntSize newSize = contentBoxRect().size();
    if (newSize != oldSize || controlsRenderer->needsLayout()) {
        controlsRenderer->setLocation(borderLeft() + paddingLeft(), borderTop() + paddingTop());
        controlsRenderer->style()->setHeight(Length(newSize.height(), Fixed));
        controlsRenderer->style()->setWidth(Length(newSize.width(), Fixed));
        controlsRenderer->setNeedsLayout(true, false);
        controlsRenderer->layout();
        setChildNeedsLayout(false);
    }
}

const RenderObjectChildList* RenderMedia::children() const
{
    return m_controlsShadowRoot ? m_controlsShadowRoot->renderer()->virtualChildren() : 0; 
}

RenderObjectChildList* RenderMedia::children()
{
    return m_controlsShadowRoot ? m_controlsShadowRoot->renderer()->virtualChildren() : 0; 
}
   
void RenderMedia::removeChild(RenderObject* child)
{
    ASSERT(m_controlsShadowRoot);
    ASSERT(child == m_controlsShadowRoot->renderer());
    child->removeLayers(enclosingLayer());
    static_cast<RenderMediaControlShadowRoot*>(child)->setParent(0);
}
    
void RenderMedia::createControlsShadowRoot()
{
    ASSERT(!m_controlsShadowRoot);
    m_controlsShadowRoot = new MediaControlShadowRootElement(document(), mediaElement());
}

void RenderMedia::createPanel()
{
    ASSERT(!m_panel);
    RenderStyle* style = getCachedPseudoStyle(MEDIA_CONTROLS_PANEL);
    m_panel = new HTMLDivElement(HTMLNames::divTag, document());
    RenderObject* renderer = m_panel->createRenderer(renderArena(), style);
    if (renderer) {
        m_panel->setRenderer(renderer);
        renderer->setStyle(style);
        m_panel->setAttached();
        m_panel->setInDocument(true);
        m_controlsShadowRoot->addChild(m_panel);
        m_controlsShadowRoot->renderer()->addChild(renderer);
    }
}

void RenderMedia::createMuteButton()
{
    ASSERT(!m_muteButton);
    m_muteButton = new MediaControlMuteButtonElement(document(), mediaElement());
    m_muteButton->attachToParent(m_panel.get());
}

void RenderMedia::createPlayButton()
{
    ASSERT(!m_playButton);
    m_playButton = new MediaControlPlayButtonElement(document(), mediaElement());
    m_playButton->attachToParent(m_panel.get());
}

void RenderMedia::createSeekBackButton()
{
    ASSERT(!m_seekBackButton);
    m_seekBackButton = new MediaControlSeekButtonElement(document(), mediaElement(), false);
    m_seekBackButton->attachToParent(m_panel.get());
}

void RenderMedia::createSeekForwardButton()
{
    ASSERT(!m_seekForwardButton);
    m_seekForwardButton = new MediaControlSeekButtonElement(document(), mediaElement(), true);
    m_seekForwardButton->attachToParent(m_panel.get());
}

void RenderMedia::createTimelineContainer()
{
    ASSERT(!m_timelineContainer);
    RenderStyle* style = getCachedPseudoStyle(MEDIA_CONTROLS_TIMELINE_CONTAINER);
    m_timelineContainer = new HTMLDivElement(HTMLNames::divTag, document());
    RenderObject* renderer = m_timelineContainer->createRenderer(renderArena(), style);
    if (renderer) {
        m_timelineContainer->setRenderer(renderer);
        renderer->setStyle(style);
        m_timelineContainer->setAttached();
        m_timelineContainer->setInDocument(true);
        m_panel->addChild(m_timelineContainer);
        m_panel->renderer()->addChild(renderer);
    }
}

void RenderMedia::createTimeline()
{
    ASSERT(!m_timeline);
    m_timeline = new MediaControlTimelineElement(document(), mediaElement());
    m_timeline->attachToParent(m_timelineContainer.get());
}
  
void RenderMedia::createCurrentTimeDisplay()
{
    ASSERT(!m_currentTimeDisplay);
    m_currentTimeDisplay = new MediaTimeDisplayElement(document(), mediaElement(), true);
    m_currentTimeDisplay->attachToParent(m_timelineContainer.get());
}

void RenderMedia::createTimeRemainingDisplay()
{
    ASSERT(!m_timeRemainingDisplay);
    m_timeRemainingDisplay = new MediaTimeDisplayElement(document(), mediaElement(), false);
    m_timeRemainingDisplay->attachToParent(m_timelineContainer.get());
}

void RenderMedia::createFullscreenButton()
{
    ASSERT(!m_fullscreenButton);
    m_fullscreenButton = new MediaControlFullscreenButtonElement(document(), mediaElement());
    m_fullscreenButton->attachToParent(m_panel.get());