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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.
#ifndef ASH_WM_WINDOW_PREVIEW_VIEW_H_
#define ASH_WM_WINDOW_PREVIEW_VIEW_H_
#include "ash/ash_export.h"
#include "ash/wm/window_mirror_view.h"
#include "base/containers/flat_map.h"
#include "base/containers/flat_set.h"
#include "base/memory/raw_ptr.h"
#include "ui/aura/client/transient_window_client_observer.h"
#include "ui/aura/window.h"
#include "ui/aura/window_observer.h"
#include "ui/base/metadata/metadata_header_macros.h"
#include "ui/views/view.h"
namespace ash {
// A view that mirrors the client area of a window and all its transient
// descendants.
class ASH_EXPORT WindowPreviewView
: public views::View,
public aura::client::TransientWindowClientObserver,
public aura::WindowObserver {
public:
METADATA_HEADER(WindowPreviewView);
explicit WindowPreviewView(aura::Window* window);
WindowPreviewView(const WindowPreviewView&) = delete;
WindowPreviewView& operator=(const WindowPreviewView&) = delete;
~WindowPreviewView() override;
// Recreate the preview views for the window and all its transient
// descendants.
void RecreatePreviews();
// views::View:
gfx::Size CalculatePreferredSize() const override;
void Layout() override;
// aura::client::TransientWindowClientObserver:
void OnTransientChildWindowAdded(aura::Window* parent,
aura::Window* transient_child) override;
void OnTransientChildWindowRemoved(aura::Window* parent,
aura::Window* transient_child) override;
// aura::WindowObserver:
void OnWindowDestroying(aura::Window* window) override;
void OnWindowParentChanged(aura::Window* window,
aura::Window* parent) override;
aura::Window* window() { return window_; }
private:
friend class WindowPreviewViewTestApi;
void AddWindow(aura::Window* window);
void RemoveWindow(aura::Window* window);
// Get the smallest rectangle that contains the bounds of all the windows in
// |mirror_views_|.
gfx::RectF GetUnionRect() const;
raw_ptr<aura::Window, ExperimentalAsh> window_;
base::flat_map<aura::Window*, WindowMirrorView*> mirror_views_;
// Transient children of |window_| may be added as transients before they're
// actually parented; i.e. `OnTransientChildWindowAdded()` is called before
// `transient_child->parent()` is set. We track those here so that we can add
// them to the view once they're parented.
base::flat_set<aura::Window*> unparented_transient_children_;
};
} // namespace ash
#endif // ASH_WM_WINDOW_PREVIEW_VIEW_H_
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