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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_SHELF_SHELF_WINDOW_TARGETER_H_
#define ASH_SHELF_SHELF_WINDOW_TARGETER_H_
#include "ash/shelf/shelf_observer.h"
#include "ash/shell_observer.h"
#include "base/memory/raw_ptr.h"
#include "ui/aura/window_observer.h"
#include "ui/wm/core/easy_resize_window_targeter.h"
namespace ash {
class Shelf;
// ShelfWindowTargeter makes it easier to resize windows with the mouse when the
// window-edge slightly overlaps with the shelf edge. The targeter also makes it
// easier to drag the shelf out with touch while it is hidden.
class ShelfWindowTargeter : public ::wm::EasyResizeWindowTargeter,
public aura::WindowObserver,
public ShellObserver,
public ShelfObserver {
public:
ShelfWindowTargeter(aura::Window* container, Shelf* shelf);
ShelfWindowTargeter(const ShelfWindowTargeter&) = delete;
ShelfWindowTargeter& operator=(const ShelfWindowTargeter&) = delete;
~ShelfWindowTargeter() override;
private:
// ::wm::EasyResizeWindowTargeter:
bool ShouldUseExtendedBounds(const aura::Window* window) const override;
bool GetHitTestRects(aura::Window* target,
gfx::Rect* hit_test_rect_mouse,
gfx::Rect* hit_test_rect_touch) const override;
// aura::WindowObserver:
void OnWindowDestroying(aura::Window* window) override;
// ShellObserver:
void OnShelfAlignmentChanged(aura::Window* root_window,
ShelfAlignment old_alignment) override;
// ShelfObserver:
void OnShelfVisibilityStateChanged(ShelfVisibilityState new_state) override;
// Updates `mouse_inset_size_for_shelf_visibility_` and
// `touch_inset_for_shelf_visibility_`, and runs
// `UpdateInsets()`.
void UpdateInsetsForVisibilityState(ShelfVisibilityState state);
// Updates targeter insets to insets specified by
// `mouse_size_for_shelf_visibility_` and `touch_size_for_shelf_visibility_`
// and the current shelf alighment.
void UpdateInsets();
raw_ptr<Shelf> shelf_;
// The size of the insets above the shelf for mouse events for the current
// shelf visibility.
int mouse_inset_size_for_shelf_visibility_ = 0;
// The size of the insets above the shelf for touch events for the current
// shelf visibility.
int touch_inset_size_for_shelf_visibility_ = 0;
};
} // namespace ash
#endif // ASH_SHELF_SHELF_WINDOW_TARGETER_H_
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