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// Copyright 2017 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_OZONE_PLATFORM_WAYLAND_HOST_WAYLAND_CURSOR_H_
#define UI_OZONE_PLATFORM_WAYLAND_HOST_WAYLAND_CURSOR_H_
#include <vector>
#include "base/containers/flat_map.h"
#include "base/memory/raw_ptr.h"
#include "base/timer/timer.h"
#include "third_party/skia/include/core/SkSurface.h"
#include "ui/ozone/platform/wayland/common/wayland_object.h"
#include "ui/ozone/platform/wayland/host/wayland_shm_buffer.h"
class SkBitmap;
struct wl_cursor;
namespace gfx {
class Point;
}
namespace ui {
class WaylandConnection;
class WaylandPointer;
// Interface through which WaylandCursor notifies the listener that it has
// attached another buffer to the pointer surface. The listener may free the
// previous buffer if it was holding it.
class WaylandCursorBufferListener {
public:
// Tells the listener that a new buffer is attached. |cursor_data| may be
// non-nullptr if the platform shape is used, or nullptr if the cursor has
// been hidden, or a custom bitmap has been set.
virtual void OnCursorBufferAttached(wl_cursor* cursor_data) = 0;
protected:
virtual ~WaylandCursorBufferListener() = default;
};
// Manages the actual visual representation (what users see drawn) of the
// 'pointer' (which is the Wayland term for mouse/mice).
//
// Encapsulates the low-level job such as surface and buffer management and
// Wayland protocol calls.
class WaylandCursor {
public:
WaylandCursor(WaylandPointer* pointer, WaylandConnection* connection);
WaylandCursor(const WaylandCursor&) = delete;
WaylandCursor& operator=(const WaylandCursor&) = delete;
~WaylandCursor();
// Updates wl_pointer's visual representation with the given bitmap
// image set and hotspot.
// The cursor bitmap should already match the device scale factor.
// `buffer_scale` should match the scale of the window surface, so that we
// can pass this information to the compositor which will avoid scaling it
// again.
void UpdateBitmap(const std::vector<SkBitmap>& bitmaps,
const gfx::Point& hotspot_in_dips,
int buffer_scale);
// Takes data managed by the platform (without taking ownership).
void SetPlatformShape(wl_cursor* cursor_data,
int buffer_scale);
void set_listener(WaylandCursorBufferListener* listener) {
listener_ = listener;
}
private:
// wl_buffer_listener:
static void OnBufferRelease(void* data, wl_buffer* wl_buffer);
void HideCursor();
// Prepares the platform cursor data for use. Starts animation if needed.
void SetPlatformShapeInternal();
// Does all Wayland-level calls necessary to update the cursor shape.
void AttachAndCommit(wl_buffer* buffer,
uint32_t buffer_width,
uint32_t buffer_height,
uint32_t hotspot_x_dip,
uint32_t hotspot_y_dip);
const raw_ptr<WaylandPointer, DanglingUntriaged> pointer_;
const raw_ptr<WaylandConnection> connection_;
const wl::Object<wl_surface> pointer_surface_;
// Holds the buffers and their memory until the compositor releases them.
base::flat_map<wl_buffer*, WaylandShmBuffer> buffers_;
raw_ptr<WaylandCursorBufferListener> listener_ = nullptr;
// Current platform cursor.
raw_ptr<wl_cursor> cursor_data_ = nullptr;
size_t current_image_index_ = 0;
int buffer_scale_ = 1;
base::RepeatingTimer animation_timer_;
};
} // namespace ui
#endif // UI_OZONE_PLATFORM_WAYLAND_HOST_WAYLAND_CURSOR_H_
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