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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gfx/animation/animation.h"
#include <memory>
#include "base/command_line.h"
#include "build/build_config.h"
#include "ui/gfx/animation/animation_container.h"
#include "ui/gfx/animation/animation_delegate.h"
#include "ui/gfx/animation/tween.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/switches.h"
namespace gfx {
// static
Animation::RichAnimationRenderMode Animation::rich_animation_rendering_mode_ =
RichAnimationRenderMode::PLATFORM;
// static
std::optional<bool> Animation::prefers_reduced_motion_;
Animation::Animation(base::TimeDelta timer_interval)
: timer_interval_(timer_interval),
is_animating_(false),
delegate_(nullptr) {}
Animation::~Animation() {
// Don't send out notification from the destructor. Chances are the delegate
// owns us and is being deleted as well.
if (is_animating_)
container_->Stop(this);
}
void Animation::Start() {
if (is_animating_)
return;
if (!container_) {
container_ = base::MakeRefCounted<AnimationContainer>();
if (delegate_)
delegate_->AnimationContainerWasSet(container_.get());
}
is_animating_ = true;
container_->Start(this);
AnimationStarted();
}
void Animation::Stop() {
if (!is_animating_)
return;
is_animating_ = false;
// Notify the container first as the delegate may delete us.
container_->Stop(this);
AnimationStopped();
if (delegate_) {
if (ShouldSendCanceledFromStop())
delegate_->AnimationCanceled(this);
else
delegate_->AnimationEnded(this);
}
}
double Animation::CurrentValueBetween(double start, double target) const {
return Tween::DoubleValueBetween(GetCurrentValue(), start, target);
}
int Animation::CurrentValueBetween(int start, int target) const {
return Tween::IntValueBetween(GetCurrentValue(), start, target);
}
gfx::Rect Animation::CurrentValueBetween(const gfx::Rect& start_bounds,
const gfx::Rect& target_bounds) const {
return Tween::RectValueBetween(GetCurrentValue(), start_bounds,
target_bounds);
}
void Animation::SetContainer(AnimationContainer* container) {
if (container == container_.get())
return;
if (is_animating_)
container_->Stop(this);
if (container)
container_ = container;
else
container_ = new AnimationContainer();
if (delegate_)
delegate_->AnimationContainerWasSet(container_.get());
if (is_animating_)
container_->Start(this);
}
bool Animation::ShouldRenderRichAnimation() {
if (rich_animation_rendering_mode_ == RichAnimationRenderMode::PLATFORM)
return ShouldRenderRichAnimationImpl();
return rich_animation_rendering_mode_ ==
RichAnimationRenderMode::FORCE_ENABLED;
}
base::TimeDelta Animation::RichAnimationDuration(base::TimeDelta duration) {
return ShouldRenderRichAnimation() ? duration : base::TimeDelta();
}
#if BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_IOS) || BUILDFLAG(IS_FUCHSIA)
// static
bool Animation::ShouldRenderRichAnimationImpl() {
return true;
// Defined in platform specific file for Windows, OSX, ChromeOS and Linux.
}
// static
bool Animation::ScrollAnimationsEnabledBySystem() {
return true;
// Defined in platform specific file for Windows, OSX, ChromeOS and Linux.
}
#if !BUILDFLAG(IS_ANDROID)
// static
void Animation::UpdatePrefersReducedMotion() {
// prefers_reduced_motion_ should only be modified on the UI thread.
// TODO(crbug.com/40611878): DCHECK this assertion once tests are
// well-behaved.
// By default, we assume that animations are enabled, to avoid impacting the
// experience for users on systems that don't have APIs for reduced motion.
prefers_reduced_motion_ = false;
}
#endif // !BUILDFLAG(IS_ANDROID)
#endif // BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_IOS) || BUILDFLAG(IS_FUCHSIA)
// static
bool Animation::PrefersReducedMotion() {
// --force-prefers-reduced-motion and --force-prefers-no-reduced-motion
// must always override |prefers_reduced_motion_|, so check them first.
auto* command_line = base::CommandLine::ForCurrentProcess();
if (command_line->HasSwitch(switches::kForcePrefersReducedMotion)) {
return true;
} else if (command_line->HasSwitch(switches::kForcePrefersNoReducedMotion)) {
return false;
}
if (!prefers_reduced_motion_.has_value())
UpdatePrefersReducedMotion();
return prefers_reduced_motion_.value();
}
bool Animation::ShouldSendCanceledFromStop() {
return false;
}
void Animation::SetStartTime(base::TimeTicks start_time) {
start_time_ = start_time;
}
base::TimeDelta Animation::GetTimerInterval() const {
return timer_interval_;
}
} // namespace gfx
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