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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/renderer_host/input/fling_scheduler_android.h"
#include "base/feature_list.h"
#include "build/build_config.h"
#include "content/browser/renderer_host/render_widget_host_impl.h"
#include "content/browser/renderer_host/render_widget_host_view_android.h"
#include "content/public/common/content_features.h"
#include "ui/android/view_android.h"
namespace content {
FlingSchedulerAndroid::FlingSchedulerAndroid(RenderWidgetHostImpl* host)
: host_(host) {
DCHECK(host);
}
FlingSchedulerAndroid::~FlingSchedulerAndroid() {
RemoveCompositorTick();
}
void FlingSchedulerAndroid::ScheduleFlingProgress(
base::WeakPtr<input::FlingController> fling_controller) {
DCHECK(fling_controller);
fling_controller_ = fling_controller;
if (observed_compositor_)
return;
ui::WindowAndroid* window = GetRootWindow();
if (!window)
return;
// If the root window does not have a Compositor (happens on Android
// WebView), we'll never receive an OnAnimate call. In this case fall back
// to BeginFrames coming from the host.
if (!window->GetCompositor()) {
auto* view = host_->GetView();
if (view && !view->IsRenderWidgetHostViewChildFrame()) {
static_cast<RenderWidgetHostViewAndroid*>(view)
->SetNeedsBeginFrameForFlingProgress();
}
return;
}
RequestCompositorTick();
}
void FlingSchedulerAndroid::DidStopFlingingOnBrowser(
base::WeakPtr<input::FlingController> fling_controller) {
DCHECK(fling_controller);
RemoveCompositorTick();
fling_controller_ = nullptr;
host_->GetRenderInputRouter()->DidStopFlinging();
}
bool FlingSchedulerAndroid::NeedsBeginFrameForFlingProgress() {
ui::WindowAndroid* window = GetRootWindow();
// If the root window does not have a Compositor (happens on Android
// WebView), we'll never receive an OnAnimate call. In this case fall back
// to BeginFrames coming from the host.
return !window || !window->GetCompositor();
}
bool FlingSchedulerAndroid::ShouldUseMobileFlingCurve() {
return true;
}
gfx::Vector2dF FlingSchedulerAndroid::GetPixelsPerInch(
const gfx::PointF& position_in_screen) {
return gfx::Vector2dF(input::kDefaultPixelsPerInch,
input::kDefaultPixelsPerInch);
}
void FlingSchedulerAndroid::ProgressFlingOnBeginFrameIfneeded(
base::TimeTicks current_time) {
// If a WindowAndroid is being observed, there is no need for BeginFrames
// coming from the host.
if (observed_compositor_)
return;
if (!fling_controller_)
return;
fling_controller_->ProgressFling(current_time);
}
ui::WindowAndroid* FlingSchedulerAndroid::GetRootWindow() {
if (!host_->GetView() || !host_->GetView()->GetNativeView())
return nullptr;
return host_->GetView()->GetNativeView()->GetWindowAndroid();
}
void FlingSchedulerAndroid::RequestCompositorTick() {
if (!fling_controller_)
return;
if (observed_compositor_)
return;
if (!observed_view_ && host_->GetView()) {
if (ui::ViewAndroid* native_view = host_->GetView()->GetNativeView()) {
native_view->AddObserver(this);
observed_view_ = native_view;
}
}
ui::WindowAndroid* window = GetRootWindow();
if (!window)
return;
if (!observed_window_) {
window->AddObserver(this);
observed_window_ = window;
}
CompositorImpl* compositor =
static_cast<CompositorImpl*>(window->GetCompositor());
if (!compositor)
return;
compositor->AddSimpleBeginFrameObserver(this);
observed_compositor_ = compositor;
}
void FlingSchedulerAndroid::RemoveCompositorTick() {
if (observed_view_) {
observed_view_->RemoveObserver(this);
observed_view_ = nullptr;
}
if (observed_window_) {
observed_window_->RemoveObserver(this);
observed_window_ = nullptr;
}
if (!observed_compositor_)
return;
observed_compositor_->RemoveSimpleBeginFrameObserver(this);
observed_compositor_ = nullptr;
}
void FlingSchedulerAndroid::OnAttachCompositor() {
RequestCompositorTick();
}
void FlingSchedulerAndroid::OnDetachCompositor() {
RemoveCompositorTick();
}
void FlingSchedulerAndroid::OnAttachedToWindow() {
RequestCompositorTick();
}
void FlingSchedulerAndroid::OnDetachedFromWindow() {
RemoveCompositorTick();
}
void FlingSchedulerAndroid::OnViewAndroidDestroyed() {
RemoveCompositorTick();
}
void FlingSchedulerAndroid::OnBeginFrame(
base::TimeTicks frame_begin_time,
base::TimeDelta frame_interval,
std::optional<base::TimeTicks> first_coalesced_frame_begin_time) {
DCHECK(observed_compositor_);
if (fling_controller_)
fling_controller_->ProgressFling(frame_begin_time,
first_coalesced_frame_begin_time);
}
void FlingSchedulerAndroid::OnBeginFrameSourceShuttingDown() {
if (observed_compositor_) {
observed_compositor_->RemoveSimpleBeginFrameObserver(this);
observed_compositor_ = nullptr;
}
}
} // namespace content
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