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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_WEBUI_ASH_MAKO_MAKO_BUBBLE_EVENT_HANDLER_H_
#define CHROME_BROWSER_UI_WEBUI_ASH_MAKO_MAKO_BUBBLE_EVENT_HANDLER_H_
#include <variant>
#include "base/memory/raw_ptr.h"
#include "third_party/skia/include/core/SkRegion.h"
#include "ui/base/cursor/cursor.h"
#include "ui/events/event.h"
#include "ui/events/event_handler.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/vector2d.h"
namespace ash {
// By default WebUI bubbles are not draggable, this handler brings extra
// dragging support for Mako UI.
class MakoBubbleEventHandler : public ui::EventHandler {
public:
class Delegate {
public:
virtual const std::optional<SkRegion> GetDraggableRegion() = 0;
virtual const gfx::Rect GetWidgetBoundsInScreen() = 0;
virtual void SetWidgetBoundsConstrained(const gfx::Rect bounds) = 0;
virtual void SetCursor(const ui::Cursor& cursor) = 0;
virtual bool IsDraggingEnabled() = 0;
virtual bool IsResizingEnabled() = 0;
};
struct InitialState {};
struct DraggingState {
gfx::Rect original_bounds_in_screen;
gfx::Vector2d original_pointer_pos;
};
enum class ResizingDirection {
kNone,
kTop,
kBottom,
kLeft,
kRight,
kTopLeft,
kTopRight,
kBottomLeft,
kBottomRight,
};
struct ResizingState {
ResizingDirection resizing_direction;
gfx::Rect original_bounds_in_screen;
gfx::Vector2d original_pointer_pos;
};
using State = std::variant<InitialState, DraggingState, ResizingState>;
explicit MakoBubbleEventHandler(Delegate* delegate);
MakoBubbleEventHandler(const MakoBubbleEventHandler&) = delete;
MakoBubbleEventHandler& operator=(const MakoBubbleEventHandler&) = delete;
~MakoBubbleEventHandler() override = default;
// ui::EventHandler
void OnTouchEvent(ui::TouchEvent* event) override;
void OnMouseEvent(ui::MouseEvent* event) override;
// Test only
State get_state_for_testing();
void set_state_for_testing(State s);
private:
void ProcessPointerEvent(ui::LocatedEvent& event);
raw_ptr<Delegate> delegate_;
State state_;
};
} // namespace ash
#endif // CHROME_BROWSER_UI_WEBUI_ASH_MAKO_MAKO_BUBBLE_EVENT_HANDLER_H_
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