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      1 /*
      2  * Copyright (C) 2012 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     14  *     its contributors may be used to endorse or promote products derived
     15  *     from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include "config.h"
     30 #include "core/svg/graphics/SVGImageChromeClient.h"
     31 
     32 #include "core/dom/ScriptForbiddenScope.h"
     33 #include "core/frame/FrameView.h"
     34 #include "core/svg/graphics/SVGImage.h"
     35 #include "platform/graphics/ImageObserver.h"
     36 #include "wtf/CurrentTime.h"
     37 
     38 namespace WebCore {
     39 
     40 static const double animationFrameDelay = 0.025;
     41 
     42 SVGImageChromeClient::SVGImageChromeClient(SVGImage* image)
     43     : m_image(image)
     44     , m_animationTimer(this, &SVGImageChromeClient::animationTimerFired)
     45 {
     46 }
     47 
     48 bool SVGImageChromeClient::isSVGImageChromeClient() const
     49 {
     50     return true;
     51 }
     52 
     53 void SVGImageChromeClient::chromeDestroyed()
     54 {
     55     m_image = 0;
     56 }
     57 
     58 void SVGImageChromeClient::invalidateContentsAndRootView(const IntRect& r)
     59 {
     60     // If m_image->m_page is null, we're being destructed, don't fire changedInRect() in that case.
     61     if (m_image && m_image->imageObserver() && m_image->m_page)
     62         m_image->imageObserver()->changedInRect(m_image, r);
     63 }
     64 
     65 void SVGImageChromeClient::scheduleAnimation()
     66 {
     67     // Because a single SVGImage can be shared by multiple pages, we can't key
     68     // our svg image layout on the page's real animation frame. Therefore, we
     69     // run this fake animation timer to trigger layout in SVGImages. The name,
     70     // "animationTimer", is to match the new requestAnimationFrame-based layout
     71     // approach.
     72     if (m_animationTimer.isActive())
     73         return;
     74     // Schedule the 'animation' ASAP if the image does not contain any
     75     // animations, but prefer a fixed, jittery, frame-delay if there're any
     76     // animations. Checking for pending/active animations could be more
     77     // stringent.
     78     double fireTime = m_image->hasAnimations() ? animationFrameDelay : 0;
     79     m_animationTimer.startOneShot(fireTime, FROM_HERE);
     80 }
     81 
     82 void SVGImageChromeClient::animationTimerFired(Timer<SVGImageChromeClient>*)
     83 {
     84     if (!m_image)
     85         return;
     86     // serviceScriptedAnimations runs requestAnimationFrame callbacks, but SVG
     87     // images can't have any so we assert there's no script.
     88     ScriptForbiddenScope forbidScript;
     89     m_image->frameView()->page()->animator().serviceScriptedAnimations(monotonicallyIncreasingTime());
     90     m_image->frameView()->updateLayoutAndStyleForPainting();
     91 }
     92 
     93 }
     94