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/*
* Copyright (C) 2010 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. AND ITS 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 APPLE INC. OR ITS 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 "PageOverlay.h"
#include "WebPage.h"
#include "WebProcess.h"
#include <WebCore/Frame.h>
#include <WebCore/FrameView.h>
#include <WebCore/GraphicsContext.h>
#include <WebCore/Page.h>
#include <WebCore/ScrollbarTheme.h>
using namespace WebCore;
namespace WebKit {
static const double fadeAnimationDuration = 0.2;
static const double fadeAnimationFrameRate = 30;
PassRefPtr<PageOverlay> PageOverlay::create(Client* client)
{
return adoptRef(new PageOverlay(client));
}
PageOverlay::PageOverlay(Client* client)
: m_client(client)
, m_webPage(0)
, m_fadeAnimationTimer(WebProcess::shared().runLoop(), this, &PageOverlay::fadeAnimationTimerFired)
, m_fadeAnimationStartTime(0.0)
, m_fadeAnimationDuration(fadeAnimationDuration)
, m_fadeAnimationType(NoAnimation)
, m_fractionFadedIn(1.0)
, m_pageOverlayShouldApplyFadeWhenPainting(true)
{
}
PageOverlay::~PageOverlay()
{
}
IntRect PageOverlay::bounds() const
{
FrameView* frameView = m_webPage->corePage()->mainFrame()->view();
int width = frameView->width();
int height = frameView->height();
if (!ScrollbarTheme::theme()->usesOverlayScrollbars()) {
if (frameView->verticalScrollbar())
width -= frameView->verticalScrollbar()->width();
if (frameView->horizontalScrollbar())
height -= frameView->horizontalScrollbar()->height();
}
return IntRect(0, 0, width, height);
}
void PageOverlay::setPage(WebPage* webPage)
{
m_client->willMoveToWebPage(this, webPage);
m_webPage = webPage;
m_client->didMoveToWebPage(this, webPage);
if (m_webPage)
m_pageOverlayShouldApplyFadeWhenPainting = m_webPage->drawingArea()->pageOverlayShouldApplyFadeWhenPainting();
m_fadeAnimationTimer.stop();
}
void PageOverlay::setNeedsDisplay(const IntRect& dirtyRect)
{
if (m_webPage) {
if (!m_pageOverlayShouldApplyFadeWhenPainting)
m_webPage->drawingArea()->setPageOverlayOpacity(m_fractionFadedIn);
m_webPage->drawingArea()->setPageOverlayNeedsDisplay(dirtyRect);
}
}
void PageOverlay::setNeedsDisplay()
{
setNeedsDisplay(bounds());
}
void PageOverlay::drawRect(GraphicsContext& graphicsContext, const IntRect& dirtyRect)
{
// If the dirty rect is outside the bounds, ignore it.
IntRect paintRect = intersection(dirtyRect, bounds());
if (paintRect.isEmpty())
return;
GraphicsContextStateSaver stateSaver(graphicsContext);
graphicsContext.beginTransparencyLayer(1);
graphicsContext.setCompositeOperation(CompositeCopy);
m_client->drawRect(this, graphicsContext, paintRect);
graphicsContext.endTransparencyLayer();
}
bool PageOverlay::mouseEvent(const WebMouseEvent& mouseEvent)
{
// Ignore events outside the bounds.
if (!bounds().contains(mouseEvent.position()))
return false;
return m_client->mouseEvent(this, mouseEvent);
}
void PageOverlay::startFadeInAnimation()
{
m_fractionFadedIn = 0.0;
m_fadeAnimationType = FadeInAnimation;
startFadeAnimation();
}
void PageOverlay::startFadeOutAnimation()
{
m_fractionFadedIn = 1.0;
m_fadeAnimationType = FadeOutAnimation;
startFadeAnimation();
}
void PageOverlay::startFadeAnimation()
{
m_fadeAnimationStartTime = currentTime();
// Start the timer
m_fadeAnimationTimer.startRepeating(1 / fadeAnimationFrameRate);
}
void PageOverlay::fadeAnimationTimerFired()
{
float animationProgress = (currentTime() - m_fadeAnimationStartTime) / m_fadeAnimationDuration;
if (animationProgress >= 1.0)
animationProgress = 1.0;
double sine = sin(piOverTwoFloat * animationProgress);
float fadeAnimationValue = sine * sine;
m_fractionFadedIn = (m_fadeAnimationType == FadeInAnimation) ? fadeAnimationValue : 1 - fadeAnimationValue;
if (m_pageOverlayShouldApplyFadeWhenPainting)
setNeedsDisplay();
else
m_webPage->drawingArea()->setPageOverlayOpacity(m_fractionFadedIn);
if (animationProgress == 1.0) {
m_fadeAnimationTimer.stop();
bool wasFadingOut = m_fadeAnimationType == FadeOutAnimation;
m_fadeAnimationType = NoAnimation;
if (wasFadingOut) {
// If this was a fade out, go ahead and uninstall the page overlay.
m_webPage->uninstallPageOverlay(this, false);
}
}
}
} // namespace WebKit
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