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touch.cpp
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touch.cpp
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#include <wayfire/util/log.hpp>
#include <wayfire/bindings-repository.hpp>
#include "touch.hpp"
#include "cursor.hpp"
#include "input-manager.hpp"
#include "../core-impl.hpp"
#include "wayfire/core.hpp"
#include "wayfire/output.hpp"
#include "wayfire/util.hpp"
#include "wayfire/output-layout.hpp"
class touch_timer_adapter_t : public wf::touch::timer_interface_t
{
public:
wf::wl_timer<false> timer;
void set_timeout(uint32_t msec, std::function<void()> handler)
{
timer.set_timeout(msec, handler);
}
void reset()
{
timer.disconnect();
}
};
wf::touch_interface_t::touch_interface_t(wlr_cursor *cursor, wlr_seat *seat,
input_surface_selector_t surface_at)
{
this->cursor = cursor;
this->seat = seat;
this->surface_at = surface_at;
// connect handlers
on_down.set_callback([=] (void *data)
{
auto ev = static_cast<wlr_touch_down_event*>(data);
auto mode = emit_device_event_signal(ev, &ev->touch->base);
if (mode != input_event_processing_mode_t::IGNORE)
{
double lx, ly;
wlr_cursor_absolute_to_layout_coords(cursor, &ev->touch->base, ev->x, ev->y, &lx, &ly);
wf::pointf_t point;
wf::get_core().output_layout->get_output_coords_at({lx, ly}, point);
handle_touch_down(ev->touch_id, ev->time_msec, point, mode);
}
wf::get_core().seat->notify_activity();
emit_device_post_event_signal(ev, &ev->touch->base);
});
on_up.set_callback([=] (void *data)
{
auto ev = static_cast<wlr_touch_up_event*>(data);
auto mode = emit_device_event_signal(ev, &ev->touch->base);
if (mode != input_event_processing_mode_t::IGNORE)
{
handle_touch_up(ev->touch_id, ev->time_msec, mode);
}
wf::get_core().seat->notify_activity();
emit_device_post_event_signal(ev, &ev->touch->base);
});
on_motion.set_callback([=] (void *data)
{
auto ev = static_cast<wlr_touch_motion_event*>(data);
auto mode = emit_device_event_signal(ev, &ev->touch->base);
if (mode != input_event_processing_mode_t::IGNORE)
{
double lx, ly;
wlr_cursor_absolute_to_layout_coords(
wf::get_core_impl().seat->priv->cursor->cursor, &ev->touch->base,
ev->x, ev->y, &lx, &ly);
wf::pointf_t point;
wf::get_core().output_layout->get_output_coords_at({lx, ly}, point);
handle_touch_motion(ev->touch_id, ev->time_msec, point, true, mode);
}
wf::get_core().seat->notify_activity();
emit_device_post_event_signal(ev, &ev->touch->base);
});
on_cancel.set_callback([=] (void *data)
{
wlr_touch_cancel_event *ev = (wlr_touch_cancel_event*)data;
wlr_touch_up_event sim;
sim.time_msec = ev->time_msec;
sim.touch_id = ev->touch_id;
sim.touch = ev->touch;
this->on_up.emit(&sim);
});
on_frame.set_callback([&] (void*)
{
wlr_seat_touch_notify_frame(wf::get_core().get_current_seat());
wf::get_core().seat->notify_activity();
});
on_up.connect(&cursor->events.touch_up);
on_down.connect(&cursor->events.touch_down);
on_frame.connect(&cursor->events.touch_frame);
on_motion.connect(&cursor->events.touch_motion);
on_cancel.connect(&cursor->events.touch_cancel);
on_root_node_updated = [=] (wf::scene::root_node_update_signal *data)
{
if (!(data->flags & wf::scene::update_flag::INPUT_STATE))
{
return;
}
for (auto& [finger_id, node] : this->focus)
{
if (node && !is_grabbed_node_alive(node))
{
set_touch_focus(nullptr, finger_id, get_current_time(), {0, 0});
}
}
};
wf::get_core().scene()->connect(&on_root_node_updated);
add_default_gestures();
}
wf::touch_interface_t::~touch_interface_t()
{}
const wf::touch::gesture_state_t& wf::touch_interface_t::get_state() const
{
return this->finger_state;
}
wf::scene::node_ptr wf::touch_interface_t::get_focus(int finger_id) const
{
auto it = this->focus.find(finger_id);
return (it == focus.end() ? nullptr : it->second);
}
void wf::touch_interface_t::add_touch_gesture(
nonstd::observer_ptr<touch::gesture_t> gesture)
{
gesture->set_timer(std::make_unique<touch_timer_adapter_t>());
this->gestures.emplace_back(gesture);
}
void wf::touch_interface_t::rem_touch_gesture(
nonstd::observer_ptr<touch::gesture_t> gesture)
{
gestures.erase(std::remove(gestures.begin(), gestures.end(), gesture),
gestures.end());
}
void wf::touch_interface_t::set_touch_focus(wf::scene::node_ptr node,
int id, int64_t time, wf::pointf_t point)
{
if (focus[id] == node)
{
return;
}
if (focus[id])
{
focus[id]->touch_interaction().handle_touch_up(time, id, point);
}
focus[id] = node;
if (node)
{
auto local = get_node_local_coords(node.get(), point);
node->touch_interaction().handle_touch_down(time, id, local);
}
wf::touch_focus_changed_signal ev;
ev.finger_id = id;
ev.new_focus = node;
wf::get_core().emit(&ev);
}
void wf::touch_interface_t::transfer_grab(scene::node_ptr grab_node)
{
auto new_focus = grab_node->wants_raw_input() ? grab_node : nullptr;
for (auto& [id, focused_node] : this->focus)
{
if (focused_node && (focused_node != new_focus) && !focused_node->wants_raw_input())
{
const auto lift_off_position = finger_state.fingers[id].current;
focused_node->touch_interaction().handle_touch_up(get_current_time(), id,
{lift_off_position.x, lift_off_position.y});
}
focused_node = new_focus;
}
}
void wf::touch_interface_t::update_gestures(const wf::touch::gesture_event_t& ev)
{
for (auto& gesture : this->gestures)
{
if ((this->finger_state.fingers.size() == 1) &&
(ev.type == touch::EVENT_TYPE_TOUCH_DOWN))
{
gesture->reset(ev.time);
}
gesture->update_state(ev);
}
}
void wf::touch_interface_t::handle_touch_down(int32_t id, uint32_t time,
wf::pointf_t point, input_event_processing_mode_t mode)
{
auto& seat = wf::get_core_impl().seat;
seat->priv->break_mod_bindings();
if (id == 0)
{
wf::get_core().seat->focus_output(
wf::get_core().output_layout->get_output_at(point.x, point.y));
}
// NB. We first update the focus, and then update the gesture,
// except if the input is grabbed.
//
// This is necessary because wm-focus needs to know the touch focus at the
// moment the tap happens
wf::touch::gesture_event_t gesture_event = {
.type = wf::touch::EVENT_TYPE_TOUCH_DOWN,
.time = time,
.finger = id,
.pos = {point.x, point.y}
};
finger_state.update(gesture_event);
if (mode != input_event_processing_mode_t::FULL)
{
update_gestures(gesture_event);
update_cursor_state();
return;
}
auto focus = this->surface_at(point);
set_touch_focus(focus, id, time, point);
seat->priv->update_drag_icon();
update_gestures(gesture_event);
update_cursor_state();
}
void wf::touch_interface_t::handle_touch_motion(int32_t id, uint32_t time,
wf::pointf_t point, bool is_real_event, input_event_processing_mode_t mode)
{
// handle_touch_motion is called on both real motion events and when
// touch focus should be updated.
//
// In case this is not a real event, we don't want to update gestures,
// because focus change can happen even while some gestures are still
// updating.
if (is_real_event)
{
const wf::touch::gesture_event_t gesture_event = {
.type = wf::touch::EVENT_TYPE_MOTION,
.time = time,
.finger = id,
.pos = {point.x, point.y}
};
update_gestures(gesture_event);
finger_state.update(gesture_event);
}
if (focus[id])
{
auto local = get_node_local_coords(focus[id].get(), point);
focus[id]->touch_interaction().handle_touch_motion(time, id, local);
}
auto& seat = wf::get_core_impl().seat;
seat->priv->update_drag_icon();
}
void wf::touch_interface_t::handle_touch_up(int32_t id, uint32_t time,
input_event_processing_mode_t mode)
{
const auto lift_off_position = finger_state.fingers[id].current;
const wf::touch::gesture_event_t gesture_event = {
.type = wf::touch::EVENT_TYPE_TOUCH_UP,
.time = time,
.finger = id,
.pos = lift_off_position,
};
update_gestures(gesture_event);
finger_state.update(gesture_event);
update_cursor_state();
set_touch_focus(nullptr, id, time, {lift_off_position.x, lift_off_position.y});
}
void wf::touch_interface_t::update_cursor_state()
{
auto& seat = wf::get_core_impl().seat;
/* just set the cursor mode, independent of how many fingers we have */
seat->priv->cursor->set_touchscreen_mode(true);
}
// Swipe params
constexpr static int EDGE_SWIPE_THRESHOLD = 10;
constexpr static double MIN_SWIPE_DISTANCE = 30;
constexpr static double MAX_SWIPE_DISTANCE = 450;
constexpr static double SWIPE_INCORRECT_DRAG_TOLERANCE = 150;
// Pinch params
constexpr static double PINCH_INCORRECT_DRAG_TOLERANCE = 200;
constexpr static double PINCH_THRESHOLD = 1.5;
// General
constexpr static double GESTURE_INITIAL_TOLERANCE = 40;
constexpr static uint32_t GESTURE_BASE_DURATION = 400;
using namespace wf::touch;
/**
* swipe and with multiple fingers and directions
*/
class multi_action_t : public gesture_action_t
{
public:
multi_action_t(bool pinch, double threshold)
{
this->pinch = pinch;
this->threshold = threshold;
}
bool pinch;
double threshold;
bool last_pinch_was_pinch_in = false;
double move_tolerance = 1e9;
uint32_t target_direction = 0;
int32_t cnt_fingers = 0;
action_status_t update_state(const gesture_state_t& state,
const gesture_event_t& event) override
{
if (event.type == wf::touch::EVENT_TYPE_TIMEOUT)
{
return wf::touch::ACTION_STATUS_CANCELLED;
}
if (event.type == EVENT_TYPE_TOUCH_UP)
{
return ACTION_STATUS_CANCELLED;
}
if (event.type == EVENT_TYPE_TOUCH_DOWN)
{
cnt_fingers = state.fingers.size();
for (auto& finger : state.fingers)
{
if (glm::length(finger.second.delta()) > GESTURE_INITIAL_TOLERANCE)
{
return ACTION_STATUS_CANCELLED;
}
}
return ACTION_STATUS_RUNNING;
}
if (this->pinch)
{
if (glm::length(state.get_center().delta()) >= move_tolerance)
{
return ACTION_STATUS_CANCELLED;
}
double pinch = state.get_pinch_scale();
last_pinch_was_pinch_in = pinch <= 1.0;
if ((pinch <= 1.0 / threshold) || (pinch >= threshold))
{
return ACTION_STATUS_COMPLETED;
}
return ACTION_STATUS_RUNNING;
}
// swipe case
if ((glm::length(state.get_center().delta()) >= MIN_SWIPE_DISTANCE) &&
(this->target_direction == 0))
{
this->target_direction = state.get_center().get_direction();
}
if (this->target_direction == 0)
{
return ACTION_STATUS_RUNNING;
}
for (auto& finger : state.fingers)
{
if (finger.second.get_incorrect_drag_distance(this->target_direction) > this->move_tolerance)
{
return ACTION_STATUS_CANCELLED;
}
}
if (state.get_center().get_drag_distance(this->target_direction) >=
threshold)
{
return ACTION_STATUS_COMPLETED;
}
return ACTION_STATUS_RUNNING;
}
void reset(uint32_t time) override
{
gesture_action_t::reset(time);
target_direction = 0;
}
};
static uint32_t find_swipe_edges(wf::touch::point_t point)
{
auto output = wf::get_core().seat->get_active_output();
auto geometry = output->get_layout_geometry();
uint32_t edge_directions = 0;
if (point.x <= geometry.x + EDGE_SWIPE_THRESHOLD)
{
edge_directions |= wf::GESTURE_DIRECTION_RIGHT;
}
if (point.x >= geometry.x + geometry.width - EDGE_SWIPE_THRESHOLD)
{
edge_directions |= wf::GESTURE_DIRECTION_LEFT;
}
if (point.y <= geometry.y + EDGE_SWIPE_THRESHOLD)
{
edge_directions |= wf::GESTURE_DIRECTION_DOWN;
}
if (point.y >= geometry.y + geometry.height - EDGE_SWIPE_THRESHOLD)
{
edge_directions |= wf::GESTURE_DIRECTION_UP;
}
return edge_directions;
}
static uint32_t wf_touch_to_wf_dir(uint32_t touch_dir)
{
uint32_t gesture_dir = 0;
if (touch_dir & MOVE_DIRECTION_RIGHT)
{
gesture_dir |= wf::GESTURE_DIRECTION_RIGHT;
}
if (touch_dir & MOVE_DIRECTION_LEFT)
{
gesture_dir |= wf::GESTURE_DIRECTION_LEFT;
}
if (touch_dir & MOVE_DIRECTION_UP)
{
gesture_dir |= wf::GESTURE_DIRECTION_UP;
}
if (touch_dir & MOVE_DIRECTION_DOWN)
{
gesture_dir |= wf::GESTURE_DIRECTION_DOWN;
}
return gesture_dir;
}
void wf::touch_interface_t::add_default_gestures()
{
wf::option_wrapper_t<double> sensitivity{"input/gesture_sensitivity"};
// Swipe gesture needs slightly less distance because it is usually
// with many fingers and it is harder to move all of them
auto swipe = std::make_unique<multi_action_t>(false,
0.75 * MAX_SWIPE_DISTANCE / sensitivity);
swipe->set_duration(GESTURE_BASE_DURATION * sensitivity);
swipe->move_tolerance = SWIPE_INCORRECT_DRAG_TOLERANCE * sensitivity;
const double pinch_thresh = 1.0 + (PINCH_THRESHOLD - 1.0) / sensitivity;
auto pinch = std::make_unique<multi_action_t>(true, pinch_thresh);
pinch->set_duration(GESTURE_BASE_DURATION * 1.5 * sensitivity);
pinch->move_tolerance = PINCH_INCORRECT_DRAG_TOLERANCE * sensitivity;
// Edge swipe needs a quick release to be considered edge swipe
auto edge_swipe = std::make_unique<multi_action_t>(false,
MAX_SWIPE_DISTANCE / sensitivity);
auto edge_release = std::make_unique<wf::touch::touch_action_t>(1, false);
edge_swipe->set_duration(GESTURE_BASE_DURATION * sensitivity);
edge_swipe->move_tolerance = SWIPE_INCORRECT_DRAG_TOLERANCE * sensitivity;
// The release action needs longer duration to handle the case where the
// gesture is actually longer than the max distance.
edge_release->set_duration(GESTURE_BASE_DURATION * 1.5 * sensitivity);
nonstd::observer_ptr<multi_action_t> swp_ptr = swipe;
nonstd::observer_ptr<multi_action_t> pnc_ptr = pinch;
nonstd::observer_ptr<multi_action_t> esw_ptr = edge_swipe;
std::vector<std::unique_ptr<gesture_action_t>> swipe_actions,
edge_swipe_actions, pinch_actions;
swipe_actions.emplace_back(std::move(swipe));
pinch_actions.emplace_back(std::move(pinch));
edge_swipe_actions.emplace_back(std::move(edge_swipe));
edge_swipe_actions.emplace_back(std::move(edge_release));
auto ack_swipe = [swp_ptr, this] ()
{
uint32_t possible_edges =
find_swipe_edges(finger_state.get_center().origin);
if (possible_edges)
{
return;
}
uint32_t direction = wf_touch_to_wf_dir(swp_ptr->target_direction);
wf::touchgesture_t gesture{
GESTURE_TYPE_SWIPE,
direction,
swp_ptr->cnt_fingers
};
wf::get_core().bindings->handle_gesture(gesture);
};
auto ack_edge_swipe = [esw_ptr, this] ()
{
uint32_t possible_edges = find_swipe_edges(finger_state.get_center().origin);
uint32_t direction = wf_touch_to_wf_dir(esw_ptr->target_direction);
possible_edges &= direction;
if (possible_edges)
{
wf::touchgesture_t gesture{
GESTURE_TYPE_EDGE_SWIPE,
direction,
esw_ptr->cnt_fingers
};
wf::get_core().bindings->handle_gesture(gesture);
}
};
auto ack_pinch = [pnc_ptr] ()
{
wf::touchgesture_t gesture{GESTURE_TYPE_PINCH,
pnc_ptr->last_pinch_was_pinch_in ? GESTURE_DIRECTION_IN :
GESTURE_DIRECTION_OUT,
pnc_ptr->cnt_fingers
};
wf::get_core().bindings->handle_gesture(gesture);
};
this->multiswipe = std::make_unique<gesture_t>(std::move(
swipe_actions), ack_swipe);
this->edgeswipe = std::make_unique<gesture_t>(std::move(
edge_swipe_actions), ack_edge_swipe);
this->multipinch = std::make_unique<gesture_t>(std::move(
pinch_actions), ack_pinch);
this->add_touch_gesture(this->multiswipe);
this->add_touch_gesture(this->edgeswipe);
this->add_touch_gesture(this->multipinch);
}