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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROMEOS_UI_FRAME_MULTITASK_MENU_MULTITASK_MENU_VIEW_H_
#define CHROMEOS_UI_FRAME_MULTITASK_MENU_MULTITASK_MENU_VIEW_H_
#include "base/memory/raw_ptr.h"
#include "base/scoped_observation.h"
#include "chromeos/ui/frame/caption_buttons/snap_controller.h"
#include "ui/aura/window_observer.h"
#include "ui/base/metadata/metadata_header_macros.h"
#include "ui/views/view.h"
namespace views {
class View;
} // namespace views
namespace chromeos {
enum class SnapDirection;
class MultitaskButton;
class SplitButtonView;
// Contains buttons which can fullscreen, snap, or float a window.
class COMPONENT_EXPORT(CHROMEOS_UI_FRAME) MultitaskMenuView
: public views::View,
public aura::WindowObserver {
METADATA_HEADER(MultitaskMenuView, views::View)
public:
// Bitmask for the buttons to show on the multitask menu view.
enum MultitaskButtons : uint8_t {
kHalfSplit = 1 << 0,
kPartialSplit = 1 << 1,
kFullscreen = 1 << 2,
kFloat = 1 << 3,
};
// `window` is the window that the buttons on this view act on. `anchor_view`
// should be passed when we want the functionality of auto-closing the menu
// when the mouse moves out of the menu or the anchor.
MultitaskMenuView(aura::Window* window,
base::RepeatingClosure close_callback,
base::RepeatingClosure dismiss_callback,
uint8_t buttons,
views::View* anchor_view);
MultitaskMenuView(const MultitaskMenuView&) = delete;
MultitaskMenuView& operator=(const MultitaskMenuView&) = delete;
~MultitaskMenuView() override;
SplitButtonView* partial_button() { return partial_button_.get(); }
// Forwarded from the size button which is the anchor of `this`'s widget. When
// an event starts on the size button, it will receive all subsequent events.
// Therefore, we have to manually forward them if the pointer is visually on
// `this`. Receives the event and updates the hover state or fires the
// callback of the button that the pointer is visually on top of.
// `OnSizeButtonRelease` returns true if any button was activated.
void OnSizeButtonDrag(const gfx::Point& event_screen_location);
bool OnSizeButtonRelease(const gfx::Point& event_screen_location);
// views::View:
void AddedToWidget() override;
bool AcceleratorPressed(const ui::Accelerator& accelerator) override;
bool OnKeyPressed(const ui::KeyEvent& event) override;
// aura::WindowObserver:
void OnWindowDestroying(aura::Window* parent_window) override;
void OnWindowBoundsChanged(aura::Window* window,
const gfx::Rect& old_bounds,
const gfx::Rect& new_bounds,
ui::PropertyChangeReason reason) override;
void OnWindowVisibilityChanging(aura::Window* window, bool visible) override;
// If the menu is opened because of mouse hover, moving the mouse outside the
// menu for 3 seconds will result in it auto closing. This function reduces
// that 3 second delay to zero.
static void SetSkipMouseOutDelayForTesting(bool val);
private:
class MenuPreTargetHandler;
friend class MultitaskMenuViewTestApi;
// Callbacks for the buttons in the multitask menu view.
void HalfButtonPressed(SnapDirection direction);
void PartialButtonPressed(SnapDirection direction);
void FullScreenButtonPressed();
void FloatButtonPressed();
// Owned by views hierarchy.
raw_ptr<SplitButtonView> half_button_ = nullptr;
raw_ptr<SplitButtonView> partial_button_ = nullptr;
raw_ptr<MultitaskButton> full_button_ = nullptr;
raw_ptr<MultitaskButton> float_button_ = nullptr;
// True if the menu buttons should be painted in reverse, when the `Alt` key
// is pressed. Toggled on every `Alt` press.
bool is_reversed_ = false;
// The window which the buttons act on.
raw_ptr<aura::Window> window_;
// The view the menu is anchored to if any. This is only passed if we want to
// close the menu when the mouse moves out of the multitask menu or its anchor
// view.
const raw_ptr<views::View, DanglingUntriaged> anchor_view_;
// Runs when the widget which contains `this` should be destroyed. For
// example, after any of the buttons are pressed, or a press out of the menu
// bounds.
base::RepeatingClosure close_callback_;
// Run by the `MenuPreTargetHandler` to dismiss the menu when clicking outside
// the menu (or anchor) bounds, or after timeout.
base::RepeatingClosure dismiss_callback_;
std::unique_ptr<MenuPreTargetHandler> event_handler_;
base::ScopedObservation<aura::Window, aura::WindowObserver>
window_observation_{this};
};
} // namespace chromeos
#endif // CHROMEOS_UI_FRAME_MULTITASK_MENU_MULTITASK_MENU_VIEW_H_
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