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/*
* Copyright (C) 2012 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.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE 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 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 "third_party/blink/renderer/core/svg/graphics/svg_image_chrome_client.h"
#include <algorithm>
#include <utility>
#include "third_party/blink/renderer/core/svg/graphics/svg_image.h"
#include "third_party/blink/renderer/platform/graphics/image_observer.h"
#include "third_party/blink/renderer/platform/scheduler/public/thread_scheduler.h"
#include "third_party/blink/renderer/platform/wtf/time.h"
namespace blink {
static constexpr base::TimeDelta kAnimationFrameDelay =
base::TimeDelta::FromSecondsD(1.0 / 60);
SVGImageChromeClient::SVGImageChromeClient(SVGImage* image)
: image_(image),
animation_timer_(std::make_unique<TaskRunnerTimer<SVGImageChromeClient>>(
ThreadScheduler::Current()->CompositorTaskRunner(),
this,
&SVGImageChromeClient::AnimationTimerFired)),
timeline_state_(kRunning) {}
bool SVGImageChromeClient::IsSVGImageChromeClient() const {
return true;
}
void SVGImageChromeClient::ChromeDestroyed() {
image_ = nullptr;
}
void SVGImageChromeClient::InvalidateRect(const IntRect&) {
// If image_->page_ is null, we're being destructed, so don't fire
// |Changed()| in that case.
if (image_ && image_->GetImageObserver() && image_->page_)
image_->GetImageObserver()->Changed(image_);
}
void SVGImageChromeClient::SuspendAnimation() {
if (image_->MaybeAnimated()) {
timeline_state_ = kSuspendedWithAnimationPending;
} else {
// Preserve SuspendedWithAnimationPending if set.
timeline_state_ = std::max(timeline_state_, kSuspended);
}
}
void SVGImageChromeClient::ResumeAnimation() {
bool have_pending_animation =
timeline_state_ == kSuspendedWithAnimationPending;
timeline_state_ = kRunning;
// If an animation frame was pending/requested while animations were
// suspended, schedule a new animation frame.
if (!have_pending_animation)
return;
ScheduleAnimation(nullptr);
}
void SVGImageChromeClient::RestoreAnimationIfNeeded() {
// If the timeline is not suspended we needn't attempt to restore.
if (!IsSuspended())
return;
image_->RestoreAnimation();
}
void SVGImageChromeClient::ScheduleAnimation(const LocalFrameView*) {
// Because a single SVGImage can be shared by multiple pages, we can't key
// our svg image layout on the page's real animation frame. Therefore, we
// run this fake animation timer to trigger layout in SVGImages. The name,
// "animationTimer", is to match the new requestAnimationFrame-based layout
// approach.
if (animation_timer_->IsActive())
return;
// Schedule the 'animation' ASAP if the image does not contain any
// animations, but prefer a fixed, jittery, frame-delay if there're any
// animations. Checking for pending/active animations could be more
// stringent.
base::TimeDelta fire_time;
if (image_->MaybeAnimated()) {
if (IsSuspended())
return;
fire_time = kAnimationFrameDelay;
}
animation_timer_->StartOneShot(fire_time, FROM_HERE);
}
void SVGImageChromeClient::SetTimer(std::unique_ptr<TimerBase> timer) {
animation_timer_ = std::move(timer);
}
void SVGImageChromeClient::AnimationTimerFired(TimerBase*) {
if (!image_)
return;
// The SVGImageChromeClient object's lifetime is dependent on
// the ImageObserver (an ImageResourceContent) of its image. Should it
// be dead and about to be lazily swept out, then GetImageObserver()
// becomes null and we do not proceed.
//
// TODO(Oilpan): move (SVG)Image to the Oilpan heap, and avoid
// this explicit lifetime check.
if (!image_->GetImageObserver())
return;
image_->ServiceAnimations(base::TimeTicks::Now());
}
} // namespace blink
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