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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.h"
#include "build/build_config.h"
#include "content/browser/renderer_host/render_widget_host_impl.h"
#include "ui/compositor/compositor.h"
#include "ui/display/screen.h"
#if defined(USE_AURA)
#include "ui/aura/window.h"
#include "ui/aura/window_tree_host.h"
#endif
#if BUILDFLAG(IS_CHROMEOS)
#include "ui/display/screen.h"
#endif // BUILDFLAG(IS_CHROMEOS)
#if BUILDFLAG(IS_WIN)
#include "ui/display/win/screen_win.h"
#endif // BUILDFLAG(IS_WIN)
namespace content {
FlingScheduler::FlingScheduler(RenderWidgetHostImpl* host) : host_(host) {
DCHECK(host);
}
FlingScheduler::~FlingScheduler() {
if (observed_compositor_)
observed_compositor_->RemoveAnimationObserver(this);
}
void FlingScheduler::ScheduleFlingProgress(
base::WeakPtr<input::FlingController> fling_controller) {
DCHECK(fling_controller);
fling_controller_ = fling_controller;
// Don't do anything if a ui::Compositor is already being observed.
if (observed_compositor_)
return;
ui::Compositor* compositor = GetCompositor();
if (compositor) {
compositor->AddAnimationObserver(this);
observed_compositor_ = compositor;
}
}
void FlingScheduler::DidStopFlingingOnBrowser(
base::WeakPtr<input::FlingController> fling_controller) {
DCHECK(fling_controller);
if (observed_compositor_) {
observed_compositor_->RemoveAnimationObserver(this);
observed_compositor_ = nullptr;
}
fling_controller_ = nullptr;
host_->GetRenderInputRouter()->DidStopFlinging();
}
bool FlingScheduler::NeedsBeginFrameForFlingProgress() {
return !GetCompositor();
}
bool FlingScheduler::ShouldUseMobileFlingCurve() {
#if BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_IOS)
return true;
#elif BUILDFLAG(IS_CHROMEOS)
CHECK(display::Screen::GetScreen());
return display::Screen::GetScreen()->InTabletMode();
#else
return false;
#endif
}
gfx::Vector2dF FlingScheduler::GetPixelsPerInch(
const gfx::PointF& position_in_screen) {
#if BUILDFLAG(IS_WIN)
return display::win::GetScreenWin()->GetPixelsPerInch(position_in_screen);
#else
return gfx::Vector2dF(input::kDefaultPixelsPerInch,
input::kDefaultPixelsPerInch);
#endif
}
void FlingScheduler::ProgressFlingOnBeginFrameIfneeded(
base::TimeTicks current_time) {
// No fling is active.
if (!fling_controller_)
return;
// FlingProgress will be called within FlingController::OnAnimationStep.
if (observed_compositor_)
return;
fling_controller_->ProgressFling(current_time);
}
ui::Compositor* FlingScheduler::GetCompositor() {
if (!host_->GetView()) {
return nullptr;
}
return host_->GetView()->GetCompositor();
}
void FlingScheduler::OnAnimationStep(base::TimeTicks timestamp) {
DCHECK(observed_compositor_);
if (fling_controller_)
fling_controller_->ProgressFling(timestamp);
}
void FlingScheduler::OnCompositingShuttingDown(ui::Compositor* compositor) {
DCHECK_EQ(observed_compositor_, compositor);
observed_compositor_->RemoveAnimationObserver(this);
observed_compositor_ = nullptr;
}
} // namespace content
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