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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_WM_CORE_CURSOR_MANAGER_H_
#define UI_WM_CORE_CURSOR_MANAGER_H_
#include <memory>
#include "base/component_export.h"
#include "base/observer_list.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/aura/client/cursor_client.h"
#include "ui/display/display.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/wm/core/native_cursor_manager_delegate.h"
namespace ui {
class KeyEvent;
class TouchEvent;
enum class CursorSize;
}
namespace wm {
namespace internal {
class CursorState;
}
class NativeCursorManager;
// This class receives requests to change cursor properties, as well as
// requests to queue any further changes until a later time. It sends changes
// to the NativeCursorManager, which communicates back to us when these changes
// were made through the NativeCursorManagerDelegate interface.
class COMPONENT_EXPORT(UI_WM) CursorManager
: public aura::client::CursorClient,
public NativeCursorManagerDelegate {
public:
explicit CursorManager(std::unique_ptr<NativeCursorManager> delegate);
CursorManager(const CursorManager&) = delete;
CursorManager& operator=(const CursorManager&) = delete;
~CursorManager() override;
// Resets the last visibility state, etc. Currently only called by tests.
static void ResetCursorVisibilityStateForTest();
// Overridden from aura::client::CursorClient:
void SetCursor(gfx::NativeCursor) override;
gfx::NativeCursor GetCursor() const override;
void SetCursorForced(gfx::NativeCursor) override;
void ShowCursor() override;
void HideCursor() override;
bool IsCursorVisible() const override;
void SetCursorSize(ui::CursorSize cursor_size) override;
ui::CursorSize GetCursorSize() const override;
void SetLargeCursorSizeInDip(int large_cursor_size_in_dip) override;
int GetLargeCursorSizeInDip() const override;
void SetCursorColor(SkColor color) override;
SkColor GetCursorColor() const override;
void EnableMouseEvents() override;
void DisableMouseEvents() override;
bool IsMouseEventsEnabled() const override;
void SetDisplay(const display::Display& display) override;
const display::Display& GetDisplay() const override;
void LockCursor() override;
void UnlockCursor() override;
bool IsCursorLocked() const override;
void AddObserver(aura::client::CursorClientObserver* observer) override;
void RemoveObserver(aura::client::CursorClientObserver* observer) override;
bool ShouldHideCursorOnKeyEvent(const ui::KeyEvent& event) const override;
bool ShouldHideCursorOnTouchEvent(const ui::TouchEvent& event) const override;
gfx::Size GetSystemCursorSize() const override;
private:
// Overridden from NativeCursorManagerDelegate:
void CommitCursor(gfx::NativeCursor cursor) override;
void CommitVisibility(bool visible) override;
void CommitCursorSize(ui::CursorSize cursor_size) override;
void CommitLargeCursorSizeInDip(int large_cursor_size_in_dip) override;
void CommitCursorColor(SkColor color) override;
void CommitMouseEventsEnabled(bool enabled) override;
void CommitSystemCursorSize(const gfx::Size& cursor_size) override;
void SetCursorImpl(gfx::NativeCursor cursor, bool forced);
std::unique_ptr<NativeCursorManager> delegate_;
// Display where the cursor is located.
display::Display display_;
// Number of times LockCursor() has been invoked without a corresponding
// UnlockCursor().
int cursor_lock_count_;
// The current state of the cursor.
std::unique_ptr<internal::CursorState> current_state_;
// The cursor state to restore when the cursor is unlocked.
std::unique_ptr<internal::CursorState> state_on_unlock_;
base::ObserverList<aura::client::CursorClientObserver>::
UncheckedAndDanglingUntriaged observers_;
// This flag holds the cursor visibility state for the duration of the
// process. Defaults to true. This flag helps ensure that when a
// CursorManager instance is created it gets populated with the correct
// cursor visibility state.
static bool last_cursor_visibility_state_;
};
} // namespace wm
#endif // UI_WM_CORE_CURSOR_MANAGER_H_
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