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// Copyright 2012 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_DRAG_WINDOW_CONTROLLER_H_
#define ASH_WM_DRAG_WINDOW_CONTROLLER_H_
#include <memory>
#include <vector>
#include "ash/ash_export.h"
#include "base/gtest_prod_util.h"
#include "base/memory/raw_ptr.h"
#include "third_party/abseil-cpp/absl/types/optional.h"
#include "ui/gfx/geometry/rect.h"
namespace aura {
class Window;
}
namespace ui {
class Shadow;
}
namespace ash {
// Handles visuals for window dragging as it relates to multi-display support.
// Phantom windows called "drag windows" represent the window on other displays.
class ASH_EXPORT DragWindowController {
public:
DragWindowController(
aura::Window* window,
bool is_touch_dragging,
const absl::optional<gfx::Rect>& shadow_bounds = absl::nullopt);
DragWindowController(const DragWindowController&) = delete;
DragWindowController& operator=(const DragWindowController&) = delete;
virtual ~DragWindowController();
// Updates bounds and opacity for the drag windows, and creates/destroys each
// drag window so that it only exists when it would have nonzero opacity. Also
// updates the opacity of the original window.
void Update();
float old_opacity_for_testing() const { return old_opacity_; }
private:
class DragWindowDetails;
FRIEND_TEST_ALL_PREFIXES(DragWindowResizerTest, DragWindowController);
FRIEND_TEST_ALL_PREFIXES(DragWindowResizerTest,
DragWindowControllerAcrossThreeDisplays);
FRIEND_TEST_ALL_PREFIXES(DragWindowResizerTest,
DragWindowControllerWithCustomShadowBounds);
// Returns the currently active drag windows.
int GetDragWindowsCountForTest() const;
// Returns the drag window/layer owner for given index of the
// currently active drag windows list.
const aura::Window* GetDragWindowForTest(size_t index) const;
const ui::Shadow* GetDragWindowShadowForTest(size_t index) const;
// Call Layer::OnPaintLayer on all layers under the drag_windows_.
void RequestLayerPaintForTest();
// The original window.
raw_ptr<aura::Window, ExperimentalAsh> window_;
// Indicates touch dragging, as opposed to mouse dragging.
const bool is_touch_dragging_;
// Used if the drag windows may need their shadows adjusted.
const absl::optional<gfx::Rect> shadow_bounds_;
// |window_|'s opacity before the drag. Used to revert opacity after the drag.
const float old_opacity_;
// Phantom windows to visually represent |window_| on other displays.
std::vector<std::unique_ptr<DragWindowDetails>> drag_windows_;
};
} // namespace ash
#endif // ASH_WM_DRAG_WINDOW_CONTROLLER_H_
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