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// Copyright 2021 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_ZWP_POINTER_GESTURES_H_
#define UI_OZONE_PLATFORM_WAYLAND_HOST_WAYLAND_ZWP_POINTER_GESTURES_H_
#include <pointer-gestures-unstable-v1-client-protocol.h>
#include <optional>
#include "base/memory/raw_ptr.h"
#include "base/time/time.h"
#include "ui/events/types/event_type.h"
#include "ui/ozone/platform/wayland/common/wayland_object.h"
#include "ui/ozone/platform/wayland/common/wayland_util.h"
namespace gfx {
class Vector2dF;
}
namespace ui {
class WaylandConnection;
// Wraps the zwp_pointer_gestures and zwp_pointer_gesture_pinch_v1 objects.
class WaylandZwpPointerGestures
: public wl::GlobalObjectRegistrar<WaylandZwpPointerGestures> {
public:
static constexpr char kInterfaceName[] = "zwp_pointer_gestures_v1";
static void Instantiate(WaylandConnection* connection,
wl_registry* registry,
uint32_t name,
const std::string& interface,
uint32_t version);
class Delegate;
WaylandZwpPointerGestures(zwp_pointer_gestures_v1* pointer_gestures,
WaylandConnection* connection,
Delegate* delegate);
WaylandZwpPointerGestures(const WaylandZwpPointerGestures&) = delete;
WaylandZwpPointerGestures& operator=(const WaylandZwpPointerGestures&) =
delete;
~WaylandZwpPointerGestures();
// Init is called by WaylandConnection when its wl_pointer object is
// instantiated.
void Init();
private:
// zwp_pointer_gesture_pinch_v1_listener callbacks:
static void OnPinchBegin(
void* data,
struct zwp_pointer_gesture_pinch_v1* zwp_pointer_gesture_pinch_v1,
uint32_t serial,
uint32_t time,
struct wl_surface* surface,
uint32_t fingers);
static void OnPinchUpdate(
void* data,
struct zwp_pointer_gesture_pinch_v1* zwp_pointer_gesture_pinch_v1,
uint32_t time,
wl_fixed_t dx,
wl_fixed_t dy,
wl_fixed_t scale,
wl_fixed_t rotation);
static void OnPinchEnd(
void* data,
struct zwp_pointer_gesture_pinch_v1* zwp_pointer_gesture_pinch_v1,
uint32_t serial,
uint32_t time,
int32_t cancelled);
// zwp_pointer_gesture_hold_v1_listener callbacks:
#if defined(ZWP_POINTER_GESTURE_HOLD_V1_BEGIN_SINCE_VERSION)
static void OnHoldBegin(
void* data,
struct zwp_pointer_gesture_hold_v1* zwp_pointer_gesture_hold_v1,
uint32_t serial,
uint32_t time,
struct wl_surface* surface,
uint32_t fingers);
#endif
#if defined(ZWP_POINTER_GESTURE_HOLD_V1_END_SINCE_VERSION)
static void OnHoldEnd(
void* data,
struct zwp_pointer_gesture_hold_v1* zwp_pointer_gesture_hold_v1,
uint32_t serial,
uint32_t time,
int32_t cancelled);
#endif
wl::Object<zwp_pointer_gestures_v1> obj_;
wl::Object<zwp_pointer_gesture_pinch_v1> pinch_;
#if defined(ZWP_POINTER_GESTURES_V1_GET_HOLD_GESTURE_SINCE_VERSION)
wl::Object<zwp_pointer_gesture_hold_v1> hold_;
#endif
double current_scale_ = 1;
const raw_ptr<WaylandConnection> connection_;
const raw_ptr<Delegate> delegate_;
};
class WaylandZwpPointerGestures::Delegate {
public:
// Handles the events coming during the pinch zoom session.
// |event_type| is one of EventType::kGesturePinch### members.
// |delta| is empty on the BEGIN and END, and shows the movement of the centre
// of the gesture compared to the previous event.
// |scale_delta| is the change to the scale compared to the previous event, to
// be applied as multiplier (as the compositor expects it).
virtual void OnPinchEvent(
EventType event_type,
const gfx::Vector2dF& delta,
base::TimeTicks timestamp,
int device_id,
std::optional<float> scale_delta = std::nullopt) = 0;
virtual void OnHoldEvent(EventType event_type,
uint32_t finger_count,
base::TimeTicks timestamp,
int device_id,
wl::EventDispatchPolicy dispatch_policy) = 0;
};
} // namespace ui
#endif // UI_OZONE_PLATFORM_WAYLAND_HOST_WAYLAND_ZWP_POINTER_GESTURES_H_
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