| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef COMPONENTS_EXO_POINTER_H_ |
| #define COMPONENTS_EXO_POINTER_H_ |
| |
| #include <memory> |
| |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/unguessable_token.h" |
| #include "components/exo/surface_delegate.h" |
| #include "components/exo/surface_observer.h" |
| #include "components/exo/wm_helper.h" |
| #include "third_party/skia/include/core/SkBitmap.h" |
| #include "ui/base/cursor/cursor.h" |
| #include "ui/events/event_constants.h" |
| #include "ui/events/event_handler.h" |
| #include "ui/gfx/geometry/point.h" |
| #include "ui/gfx/geometry/point_f.h" |
| #include "ui/gfx/native_widget_types.h" |
| |
| namespace cc { |
| class CopyOutputResult; |
| } |
| |
| namespace ui { |
| class Event; |
| class MouseEvent; |
| } |
| |
| namespace exo { |
| class PointerDelegate; |
| class Surface; |
| |
| // This class implements a client pointer that represents one or more input |
| // devices, such as mice, which control the pointer location and pointer focus. |
| class Pointer : public ui::EventHandler, |
| public WMHelper::CursorObserver, |
| public SurfaceDelegate, |
| public SurfaceObserver { |
| public: |
| explicit Pointer(PointerDelegate* delegate); |
| ~Pointer() override; |
| |
| // Set the pointer surface, i.e., the surface that contains the pointer image |
| // (cursor). The |hotspot| argument defines the position of the pointer |
| // surface relative to the pointer location. Its top-left corner is always at |
| // (x, y) - (hotspot.x, hotspot.y), where (x, y) are the coordinates of the |
| // pointer location, in surface local coordinates. |
| void SetCursor(Surface* surface, const gfx::Point& hotspot); |
| |
| // Returns the current cursor for the pointer. |
| gfx::NativeCursor GetCursor(); |
| |
| // Overridden from ui::EventHandler: |
| void OnMouseEvent(ui::MouseEvent* event) override; |
| void OnScrollEvent(ui::ScrollEvent* event) override; |
| |
| // Overridden from WMHelper::CursorObserver: |
| void OnCursorSetChanged(ui::CursorSetType cursor_set) override; |
| void OnCursorDisplayChanged(const display::Display& display) override; |
| |
| // Overridden from SurfaceDelegate: |
| void OnSurfaceCommit() override; |
| bool IsSurfaceSynchronized() const override; |
| |
| // Overridden from SurfaceObserver: |
| void OnSurfaceDestroying(Surface* surface) override; |
| |
| private: |
| // Returns the effective target for |event|. |
| Surface* GetEffectiveTargetForEvent(ui::Event* event) const; |
| |
| // Asynchronously update the cursor by capturing a snapshot of |surface_|. |
| void CaptureCursor(const gfx::Point& hotspot); |
| |
| // Called when cursor snapshot has been captured. |
| void OnCursorCaptured(const gfx::Point& hotspot, |
| std::unique_ptr<cc::CopyOutputResult> result); |
| |
| // Update |cursor_| to |cursor_bitmap_| transformed for the current display. |
| void UpdateCursor(); |
| |
| // The delegate instance that all events are dispatched to. |
| PointerDelegate* const delegate_; |
| |
| // The current pointer surface. |
| Surface* surface_ = nullptr; |
| |
| // The current focus surface for the pointer. |
| Surface* focus_ = nullptr; |
| |
| // The location of the pointer in the current focus surface. |
| gfx::PointF location_; |
| |
| // The position of the pointer surface relative to the pointer location. |
| gfx::Point hotspot_; |
| |
| // Latest cursor snapshot. |
| SkBitmap cursor_bitmap_; |
| |
| // The current cursor. |
| ui::Cursor cursor_; |
| |
| // Source used for cursor capture copy output requests. |
| const base::UnguessableToken cursor_capture_source_id_; |
| |
| // Last received event type. |
| ui::EventType last_event_type_ = ui::ET_UNKNOWN; |
| |
| // Weak pointer factory used for cursor capture callbacks. |
| base::WeakPtrFactory<Pointer> cursor_capture_weak_ptr_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(Pointer); |
| }; |
| |
| } // namespace exo |
| |
| #endif // COMPONENTS_EXO_POINTER_H_ |