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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ASH_WM_WINDOW_MIRROR_VIEW_H_
#define ASH_WM_WINDOW_MIRROR_VIEW_H_
#include <memory>
#include "ash/ash_export.h"
#include "ash/wm/raster_scale/raster_scale_layer_observer.h"
#include "base/memory/raw_ptr.h"
#include "ui/aura/window_observer.h"
#include "ui/aura/window_occlusion_tracker.h"
#include "ui/base/metadata/metadata_header_macros.h"
#include "ui/views/view.h"
namespace aura {
class Window;
}
namespace ui {
class LayerTreeOwner;
}
namespace ash {
// A view that mirrors the client area of a single (source) window.
class ASH_EXPORT WindowMirrorView : public views::View,
public aura::WindowObserver {
public:
METADATA_HEADER(WindowMirrorView);
explicit WindowMirrorView(aura::Window* source,
bool show_non_client_view = false,
bool sync_bounds = false);
WindowMirrorView(const WindowMirrorView&) = delete;
WindowMirrorView& operator=(const WindowMirrorView&) = delete;
~WindowMirrorView() override;
// Returns the source of the mirror.
aura::Window* source() { return source_; }
// Recreates |layer_owner_|.
void RecreateMirrorLayers();
// aura::WindowObserver:
void OnWindowDestroying(aura::Window* window) override;
// views::View:
gfx::Size CalculatePreferredSize() const override;
void Layout() override;
bool GetNeedsNotificationWhenVisibleBoundsChange() const override;
void OnVisibleBoundsChanged() override;
void AddedToWidget() override;
void RemovedFromWidget() override;
ui::Layer* GetMirrorLayerForTesting();
protected:
virtual void InitLayerOwner();
// Gets the root of the layer tree that was lifted from |source_| (and is now
// a child of |this->layer()|).
virtual ui::Layer* GetMirrorLayer();
private:
// Calculates the bounds of the client area of the Window in the widget
// coordinate space.
gfx::Rect GetClientAreaBounds() const;
// The original window that is being represented by |this|.
raw_ptr<aura::Window, ExperimentalAsh> source_;
// The window which contains this mirror view.
raw_ptr<aura::Window, DanglingUntriaged | ExperimentalAsh> target_ = nullptr;
// Retains ownership of the mirror layer tree. This is lazily initialized
// the first time the view becomes visible.
std::unique_ptr<ui::LayerTreeOwner> layer_owner_;
// If true, shows the non client view in the mirror.
const bool show_non_client_view_;
// If true, synchronize the bounds from the source to the mirrored layers.
const bool sync_bounds_;
std::unique_ptr<aura::WindowOcclusionTracker::ScopedForceVisible>
force_occlusion_tracker_visible_;
// While a window is mirrored, apply dynamic raster scale to the underlying
// window. This is used in e.g. alt-tab and overview mode.
absl::optional<ScopedRasterScaleLayerObserverLock>
raster_scale_observer_lock_;
};
} // namespace ash
#endif // ASH_WM_WINDOW_MIRROR_VIEW_H_
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