feat: touchgesturebinds

based on lisgd

src/config/parse_config.h

@@ -158,6 +158,15 @@ typedef struct {
 	Arg arg;
 } GestureBinding;
 
+typedef struct {
+	uint32_t swipe;
+	uint32_t edge;
+	uint32_t distance;
+	uint32_t fingers_count;
+	int32_t (*func)(const Arg *);
+	Arg arg;
+} TouchGestureBinding;
+
 typedef struct {
 	int32_t id;
 	char *layout_name;
@@ -282,6 +291,14 @@ typedef struct {
 
 	double axis_scroll_factor;
 
+	double touch_distance_threshold;
+	double touch_degrees_leniency;
+	uint32_t touch_timeoutms;
+	double touch_edge_size_left;
+	double touch_edge_size_top;
+	double touch_edge_size_right;
+	double touch_edge_size_bottom;
+
 	int32_t blur;
 	int32_t blur_layer;
 	int32_t blur_optimized;
@@ -344,6 +361,9 @@ typedef struct {
 	GestureBinding *gesture_bindings;
 	int32_t gesture_bindings_count;
 
+	TouchGestureBinding *touch_gesture_bindings;
+	int32_t touch_gesture_bindings_count;
+
 	ConfigEnv **env;
 	int32_t env_count;
 
@@ -532,6 +552,92 @@ int32_t parse_direction(const char *str) {
 	}
 }
 
+int32_t parse_touch_direction(const char *str) {
+	char lowerStr[11];
+	int32_t i = 0;
+	while (str[i] && i < 10) {
+		lowerStr[i] = tolower(str[i]);
+		i++;
+	}
+	lowerStr[i] = '\0';
+
+	if (strcmp(lowerStr, "up") == 0) {
+		return TOUCH_SWIPE_UP;
+	} else if (strcmp(lowerStr, "down") == 0) {
+		return TOUCH_SWIPE_DOWN;
+	} else if (strcmp(lowerStr, "left") == 0) {
+		return TOUCH_SWIPE_LEFT;
+	} else if (strcmp(lowerStr, "right") == 0) {
+		return TOUCH_SWIPE_RIGHT;
+	} else if (strcmp(lowerStr, "up_left") == 0) {
+		return TOUCH_SWIPE_UP_LEFT;
+	} else if (strcmp(lowerStr, "up_right") == 0) {
+		return TOUCH_SWIPE_UP_RIGHT;
+	} else if (strcmp(lowerStr, "down_left") == 0) {
+		return TOUCH_SWIPE_DOWN_LEFT;
+	} else if (strcmp(lowerStr, "down_right") == 0) {
+		return TOUCH_SWIPE_DOWN_RIGHT;
+	} else {
+		return TOUCH_SWIPE_NONE;
+	}
+}
+
+int32_t parse_touch_edge(const char *str) {
+	char lowerStr[13];
+	int32_t i = 0;
+	while (str[i] && i < 12) {
+		lowerStr[i] = tolower(str[i]);
+		i++;
+	}
+	lowerStr[i] = '\0';
+
+	if (strcmp(lowerStr, "any") == 0) {
+		return EDGE_ANY;
+	} else if (strcmp(lowerStr, "none") == 0) {
+		return EDGE_NONE;
+	} else if (strcmp(lowerStr, "left") == 0) {
+		return EDGE_LEFT;
+	} else if (strcmp(lowerStr, "right") == 0) {
+		return EDGE_RIGHT;
+	} else if (strcmp(lowerStr, "top") == 0) {
+		return EDGE_TOP;
+	} else if (strcmp(lowerStr, "bottom") == 0) {
+		return EDGE_BOTTOM;
+	} else if (strcmp(lowerStr, "top_left") == 0) {
+		return CORNER_TOP_LEFT;
+	} else if (strcmp(lowerStr, "top_right") == 0) {
+		return CORNER_TOP_RIGHT;
+	} else if (strcmp(lowerStr, "bottom_left") == 0) {
+		return CORNER_BOTTOM_LEFT;
+	} else if (strcmp(lowerStr, "bottom_right") == 0) {
+		return CORNER_BOTTOM_RIGHT;
+	} else {
+		return EDGE_ANY;
+	}
+}
+
+int32_t parse_distance(const char *str) {
+	char lowerStr[7];
+	int32_t i = 0;
+	while (str[i] && i < 6) {
+		lowerStr[i] = tolower(str[i]);
+		i++;
+	}
+	lowerStr[i] = '\0';
+
+	if (strcmp(lowerStr, "any") == 0) {
+		return DISTANCE_ANY;
+	} else if (strcmp(lowerStr, "short") == 0) {
+		return DISTANCE_SHORT;
+	} else if (strcmp(lowerStr, "medium") == 0) {
+		return DISTANCE_MEDIUM;
+	} else if (strcmp(lowerStr, "long") == 0) {
+		return DISTANCE_LONG;
+	} else {
+		return DISTANCE_ANY;
+	}
+}
+
 int32_t parse_fold_state(const char *str) {
 	// 将输入字符串转换为小写
 	char lowerStr[10];
@@ -1677,6 +1783,20 @@ bool parse_option(Config *config, char *key, char *value) {
 		config->button_map = atoi(value);
 	} else if (strcmp(key, "axis_scroll_factor") == 0) {
 		config->axis_scroll_factor = atof(value);
+	} else if (strcmp(key, "touch_distance_threshold") == 0) {
+		config->touch_distance_threshold = atof(value);
+	} else if (strcmp(key, "touch_degrees_leniency") == 0) {
+		config->touch_degrees_leniency = atof(value);
+	} else if (strcmp(key, "touch_timeoutms") == 0) {
+		config->touch_timeoutms = atoi(value);
+	} else if (strcmp(key, "touch_edge_size_left") == 0) {
+		config->touch_edge_size_left = atof(value);
+	} else if (strcmp(key, "touch_edge_size_top") == 0) {
+		config->touch_edge_size_top = atof(value);
+	} else if (strcmp(key, "touch_edge_size_right") == 0) {
+		config->touch_edge_size_right = atof(value);
+	} else if (strcmp(key, "touch_edge_size_bottom") == 0) {
+		config->touch_edge_size_bottom = atof(value);
 	} else if (strcmp(key, "gappih") == 0) {
 		config->gappih = atoi(value);
 	} else if (strcmp(key, "gappiv") == 0) {
@@ -2699,6 +2819,91 @@ bool parse_option(Config *config, char *key, char *value) {
 			config->gesture_bindings_count++;
 		}
 
+	} else if (strncmp(key, "touchgesturebind", 16) == 0) {
+		config->touch_gesture_bindings =
+			realloc(config->touch_gesture_bindings,
+					(config->touch_gesture_bindings_count + 1) *
+						sizeof(TouchGestureBinding));
+		if (!config->touch_gesture_bindings) {
+			fprintf(stderr,
+					"\033[1m\033[31m[ERROR]:\033[33m Failed to allocate "
+					"memory for axis touchgesturebind\n");
+			return false;
+		}
+
+		TouchGestureBinding *binding =
+			&config
+				 ->touch_gesture_bindings[config->touch_gesture_bindings_count];
+		memset(binding, 0, sizeof(TouchGestureBinding));
+
+		char swipe_str[256], edge_str[256], distance_str[256],
+			fingers_count_str[256], func_name[256],
+			arg_value[256] = "0\0", arg_value2[256] = "0\0",
+			arg_value3[256] = "0\0", arg_value4[256] = "0\0",
+			arg_value5[256] = "0\0";
+		if (sscanf(value,
+				   "%255[^,],%255[^,],%255[^,],%255[^,],%255["
+				   "^,],%255[^,],%255[^,],%255[^,],%255[^,],%255[^\n]",
+				   swipe_str, edge_str, distance_str, fingers_count_str,
+				   func_name, arg_value, arg_value2, arg_value3, arg_value4,
+				   arg_value5) < 4) {
+			fprintf(stderr,
+					"\033[1m\033[31m[ERROR]:\033[33m Invalid touchgesturebind "
+					"format: %s\n",
+					value);
+			return false;
+		}
+
+		trim_whitespace(swipe_str);
+		trim_whitespace(edge_str);
+		trim_whitespace(distance_str);
+		trim_whitespace(fingers_count_str);
+		trim_whitespace(func_name);
+		trim_whitespace(arg_value);
+		trim_whitespace(arg_value2);
+		trim_whitespace(arg_value3);
+		trim_whitespace(arg_value4);
+		trim_whitespace(arg_value5);
+
+		binding->swipe = parse_touch_direction(swipe_str);
+		binding->edge = parse_touch_edge(edge_str);
+		binding->distance = parse_distance(distance_str);
+		binding->fingers_count = atoi(fingers_count_str);
+		binding->arg.i = 0;
+		binding->arg.i2 = 0;
+		binding->arg.f = 0.0f;
+		binding->arg.f2 = 0.0f;
+		binding->arg.ui = 0;
+		binding->arg.ui2 = 0;
+		binding->arg.v = NULL;
+		binding->arg.v2 = NULL;
+		binding->arg.v3 = NULL;
+		binding->func =
+			parse_func_name(func_name, &binding->arg, arg_value, arg_value2,
+							arg_value3, arg_value4, arg_value5);
+
+		if (!binding->func) {
+			if (binding->arg.v) {
+				free(binding->arg.v);
+				binding->arg.v = NULL;
+			}
+			if (binding->arg.v2) {
+				free(binding->arg.v2);
+				binding->arg.v2 = NULL;
+			}
+			if (binding->arg.v3) {
+				free(binding->arg.v3);
+				binding->arg.v3 = NULL;
+			}
+			fprintf(stderr,
+					"\033[1m\033[31m[ERROR]:\033[33m Unknown "
+					"dispatch in "
+					"touchgesturebind: \033[1m\033[31m%s\n",
+					func_name);
+			return false;
+		} else {
+			config->touch_gesture_bindings_count++;
+		}
 	} else if (strncmp(key, "source-optional", 15) == 0) {
 		parse_config_file(config, value, false);
 	} else if (strncmp(key, "source", 6) == 0) {
@@ -2995,6 +3200,27 @@ void free_config(void) {
 		config.gesture_bindings_count = 0;
 	}
 
+	// release touch_gesture_bindings
+	if (config.touch_gesture_bindings) {
+		for (i = 0; i < config.touch_gesture_bindings_count; i++) {
+			if (config.touch_gesture_bindings[i].arg.v) {
+				free((void *)config.touch_gesture_bindings[i].arg.v);
+				config.touch_gesture_bindings[i].arg.v = NULL;
+			}
+			if (config.touch_gesture_bindings[i].arg.v2) {
+				free((void *)config.touch_gesture_bindings[i].arg.v2);
+				config.touch_gesture_bindings[i].arg.v2 = NULL;
+			}
+			if (config.touch_gesture_bindings[i].arg.v3) {
+				free((void *)config.touch_gesture_bindings[i].arg.v3);
+				config.touch_gesture_bindings[i].arg.v3 = NULL;
+			}
+		}
+		free(config.touch_gesture_bindings);
+		config.touch_gesture_bindings = NULL;
+		config.touch_gesture_bindings_count = 0;
+	}
+
 	// 释放 tag_rules
 	if (config.tag_rules) {
 		for (int32_t i = 0; i < config.tag_rules_count; i++) {
@@ -3219,6 +3445,19 @@ void override_config(void) {
 	config.button_map = CLAMP_INT(config.button_map, 0, 1);
 	config.axis_scroll_factor =
 		CLAMP_FLOAT(config.axis_scroll_factor, 0.1f, 10.0f);
+	config.touch_distance_threshold =
+		CLAMP_FLOAT(config.touch_distance_threshold, 1.0f, 10000.0f);
+	config.touch_degrees_leniency =
+		CLAMP_FLOAT(config.touch_degrees_leniency, 0.0f, 45.0f);
+	config.touch_timeoutms = CLAMP_INT(config.touch_timeoutms, 1, 60000);
+	config.touch_edge_size_left =
+		CLAMP_FLOAT(config.touch_edge_size_left, 1.0f, 10000.0f);
+	config.touch_edge_size_top =
+		CLAMP_FLOAT(config.touch_edge_size_top, 1.0f, 10000.0f);
+	config.touch_edge_size_right =
+		CLAMP_FLOAT(config.touch_edge_size_right, 1.0f, 10000.0f);
+	config.touch_edge_size_bottom =
+		CLAMP_FLOAT(config.touch_edge_size_bottom, 1.0f, 10000.0f);
 	config.gappih = CLAMP_INT(config.gappih, 0, 1000);
 	config.gappiv = CLAMP_INT(config.gappiv, 0, 1000);
 	config.gappoh = CLAMP_INT(config.gappoh, 0, 1000);
@@ -3311,6 +3550,13 @@ void set_value_default() {
 	config.scratchpad_cross_monitor = 0;
 	config.focus_cross_tag = 0;
 	config.axis_scroll_factor = 1.0;
+	config.touch_distance_threshold = 50.0;
+	config.touch_degrees_leniency = 15.0;
+	config.touch_timeoutms = 800;
+	config.touch_edge_size_left = 50.0;
+	config.touch_edge_size_top = 50.0;
+	config.touch_edge_size_right = 50.0;
+	config.touch_edge_size_bottom = 50.0;
 	config.view_current_to_back = 0;
 	config.single_scratchpad = 1;
 	config.xwayland_persistence = 1;
@@ -3505,6 +3751,8 @@ bool parse_config(void) {
 	config.switch_bindings_count = 0;
 	config.gesture_bindings = NULL;
 	config.gesture_bindings_count = 0;
+	config.touch_gesture_bindings = NULL;
+	config.touch_gesture_bindings_count = 0;
 	config.env = NULL;
 	config.env_count = 0;
 	config.exec = NULL;

src/dispatch/gesture.h

@@ -0,0 +1,237 @@
+int32_t gesture_calculate_swipe_within_degrees(double gestdegrees,
+											   double wantdegrees) {
+	return (gestdegrees >= wantdegrees - config.touch_degrees_leniency &&
+			gestdegrees <= wantdegrees + config.touch_degrees_leniency);
+}
+
+uint32_t gesture_calculate_swipe(double x0, double y0, double x1, double y1) {
+	double t, degrees, distance;
+
+	t = atan2(x1 - x0, y0 - y1);
+	degrees = 57.2957795130823209 * (t < 0 ? t + 6.2831853071795865 : t);
+	distance = sqrt(pow(x1 - x0, 2) + pow(y1 - y0, 2));
+
+	wlr_log(WLR_DEBUG, "Swipe distance=[%.2f]; degrees=[%.2f]", distance,
+			degrees);
+
+	if (distance < config.touch_distance_threshold)
+		return TOUCH_SWIPE_NONE;
+	else if (gesture_calculate_swipe_within_degrees(degrees, 0))
+		return TOUCH_SWIPE_UP;
+	else if (gesture_calculate_swipe_within_degrees(degrees, 45))
+		return TOUCH_SWIPE_UP_RIGHT;
+	else if (gesture_calculate_swipe_within_degrees(degrees, 90))
+		return TOUCH_SWIPE_RIGHT;
+	else if (gesture_calculate_swipe_within_degrees(degrees, 135))
+		return TOUCH_SWIPE_DOWN_RIGHT;
+	else if (gesture_calculate_swipe_within_degrees(degrees, 180))
+		return TOUCH_SWIPE_DOWN;
+	else if (gesture_calculate_swipe_within_degrees(degrees, 225))
+		return TOUCH_SWIPE_DOWN_LEFT;
+	else if (gesture_calculate_swipe_within_degrees(degrees, 270))
+		return TOUCH_SWIPE_LEFT;
+	else if (gesture_calculate_swipe_within_degrees(degrees, 315))
+		return TOUCH_SWIPE_UP_LEFT;
+	else if (gesture_calculate_swipe_within_degrees(degrees, 360))
+		return TOUCH_SWIPE_UP;
+
+	return TOUCH_SWIPE_NONE;
+}
+
+uint32_t gesture_calculate_distance(Monitor *m, double x0, double y0, double x1,
+									double y1, int32_t swipe) {
+	double distance = sqrt(pow(x1 - x0, 2) + pow(y1 - y0, 2));
+	double diag = sqrt(pow(m->m.width, 2) + pow(m->m.height, 2));
+	switch (swipe) {
+	case TOUCH_SWIPE_UP:
+	case TOUCH_SWIPE_DOWN:
+		if (distance >= m->m.height * 0.66) {
+			return DISTANCE_LONG;
+		} else if (distance >= m->m.height * 0.33) {
+			return DISTANCE_MEDIUM;
+		} else {
+			return DISTANCE_SHORT;
+		}
+		break;
+	case TOUCH_SWIPE_RIGHT:
+	case TOUCH_SWIPE_LEFT:
+		if (distance >= m->m.width * 0.66) {
+			return DISTANCE_LONG;
+		} else if (distance >= m->m.width * 0.33) {
+			return DISTANCE_MEDIUM;
+		} else {
+			return DISTANCE_SHORT;
+		}
+		break;
+	case TOUCH_SWIPE_UP_RIGHT:
+	case TOUCH_SWIPE_UP_LEFT:
+	case TOUCH_SWIPE_DOWN_RIGHT:
+	case TOUCH_SWIPE_DOWN_LEFT:
+		if (distance >= diag * 0.66) {
+			return DISTANCE_LONG;
+		} else if (distance >= diag * 0.33) {
+			return DISTANCE_MEDIUM;
+		} else {
+			return DISTANCE_SHORT;
+		}
+		break;
+	}
+
+	return 0; // shouldn't happen
+}
+
+uint32_t gesture_calculate_edge(Monitor *m, double x0, double y0, double x1,
+								double y1) {
+	uint32_t horizontal = EDGE_NONE;
+	uint32_t vertical = EDGE_NONE;
+
+	if (x0 <= config.touch_edge_size_left) {
+		horizontal = EDGE_LEFT;
+	} else if (x0 >= m->m.width - config.touch_edge_size_right) {
+		horizontal = EDGE_RIGHT;
+	} else if (x1 <= config.touch_edge_size_left) {
+		horizontal = EDGE_LEFT;
+	} else if (x1 >= m->m.width - config.touch_edge_size_right) {
+		horizontal = EDGE_RIGHT;
+	}
+	if (y0 <= config.touch_edge_size_top) {
+		vertical = EDGE_TOP;
+	} else if (y0 >= m->m.height - config.touch_edge_size_bottom) {
+		vertical = EDGE_BOTTOM;
+	} else if (y1 <= config.touch_edge_size_top) {
+		vertical = EDGE_TOP;
+	} else if (y1 >= m->m.height - config.touch_edge_size_bottom) {
+		vertical = EDGE_BOTTOM;
+	}
+	if (horizontal == EDGE_LEFT && vertical == EDGE_TOP) {
+		return CORNER_TOP_LEFT;
+	} else if (horizontal == EDGE_RIGHT && vertical == EDGE_TOP) {
+		return CORNER_TOP_RIGHT;
+	} else if (horizontal == EDGE_LEFT && vertical == EDGE_BOTTOM) {
+		return CORNER_BOTTOM_LEFT;
+	} else if (horizontal == EDGE_RIGHT && vertical == EDGE_BOTTOM) {
+		return CORNER_BOTTOM_RIGHT;
+	} else if (horizontal != EDGE_NONE) {
+		return horizontal;
+	} else {
+		return vertical;
+	}
+}
+
+int32_t gesture_execute(int32_t nfingers, uint32_t swipe, uint32_t edge,
+						uint32_t distance) {
+	int32_t i;
+	int32_t handled = 0;
+
+	wlr_log(WLR_DEBUG, "f:%d s:%d e:%d d:%d", nfingers, swipe, edge, distance);
+
+	TouchGestureBinding *g;
+	for (i = 0; i < config.touch_gesture_bindings_count; i++) {
+		g = &config.touch_gesture_bindings[i];
+		if (swipe == g->swipe && nfingers == g->fingers_count &&
+			distance >= g->distance &&
+			(g->edge == EDGE_ANY || edge == g->edge ||
+			 ((edge == CORNER_TOP_LEFT || edge == CORNER_TOP_RIGHT) &&
+			  g->edge == EDGE_TOP) ||
+			 ((edge == CORNER_BOTTOM_LEFT || edge == CORNER_BOTTOM_RIGHT) &&
+			  g->edge == EDGE_BOTTOM) ||
+			 ((edge == CORNER_TOP_LEFT || edge == CORNER_BOTTOM_LEFT) &&
+			  g->edge == EDGE_LEFT) ||
+			 ((edge == CORNER_TOP_RIGHT || edge == CORNER_BOTTOM_RIGHT) &&
+			  g->edge == EDGE_RIGHT)) &&
+			g->func) {
+			g->func(&g->arg);
+			handled = 1;
+		}
+	}
+	return handled;
+}
+
+void gesture_consume(TouchGroup *tg, TouchPoint *t) {
+	if (t->consumed_by_gesture)
+		return;
+
+	struct timespec now;
+	struct wlr_touch_cancel_event *event =
+		ecalloc(1, sizeof(struct wlr_touch_cancel_event));
+
+	clock_gettime(CLOCK_MONOTONIC_RAW, &now);
+
+	event->touch_id = t->touch_id;
+	event->touch = tg->touch;
+	event->time_msec = now.tv_sec * 1000 + now.tv_nsec / 1000000;
+
+	wlr_log(WLR_DEBUG, "gesture_consume id: %d", t->touch_id);
+
+	t->consumed_by_gesture = true;
+
+	handle_touchcancel(event);
+
+	free(event);
+}
+
+void gesture_touch_down(TouchGroup *tg, TouchPoint *t, double x, double y) {
+	wlr_log(WLR_DEBUG, "touch_down id: %d", t->touch_id);
+
+	t->start_x = x;
+	t->start_y = y;
+	t->end_x = x;
+	t->end_y = y;
+
+	if (wl_list_empty(&tg->touch_points))
+		clock_gettime(CLOCK_MONOTONIC_RAW, &tg->time_down);
+}
+
+void gesture_touch_motion(TouchGroup *tg, TouchPoint *t, double x, double y) {
+	t->end_x = x;
+	t->end_y = y;
+}
+
+void gesture_touch_up(TouchGroup *tg, TouchPoint *t) {
+	struct timespec now;
+
+	wlr_log(WLR_DEBUG, "touch_up id: %d", t->touch_id);
+	wlr_log(WLR_DEBUG, "len: %d", wl_list_length(&tg->touch_points));
+
+	clock_gettime(CLOCK_MONOTONIC_RAW, &now);
+
+	uint32_t swipe =
+		gesture_calculate_swipe(t->start_x, t->start_y, t->end_x, t->end_y);
+
+	if (swipe == TOUCH_SWIPE_NONE) {
+		goto cleanup;
+	}
+
+	if (tg->touch_points_pending_swipe == 0) {
+		tg->pending_swipe = swipe;
+	}
+	if (tg->pending_swipe != swipe) {
+		goto cleanup;
+	}
+
+	tg->touch_points_pending_swipe++;
+
+	// All fingers up - check if within millisecond limit, exec, & reset
+	// (we are the last finger)
+	if (wl_list_length(&tg->touch_points) == 1) {
+		uint32_t edge = gesture_calculate_edge(tg->m, t->start_x, t->start_y,
+											   t->end_x, t->end_y);
+		uint32_t distance = gesture_calculate_distance(
+			tg->m, t->start_x, t->start_y, t->end_x, t->end_y, swipe);
+
+		if (config.touch_timeoutms >
+			((now.tv_sec - tg->time_down.tv_sec) * 1000 +
+			 (now.tv_nsec - tg->time_down.tv_nsec) / 1000000)) {
+			if (gesture_execute(tg->touch_points_pending_swipe,
+								tg->pending_swipe, edge, distance))
+				gesture_consume(tg, t);
+
+			tg->touch_points_pending_swipe = 0;
+		}
+		return;
+	}
+
+cleanup:
+	if (wl_list_length(&tg->touch_points) == 1)
+		tg->touch_points_pending_swipe = 0;
+}

src/mango.c

@@ -149,6 +149,32 @@ enum { TOP_LEFT, TOP_RIGHT, BOTTOM_LEFT, BOTTOM_RIGHT };
 
 enum { VERTICAL, HORIZONTAL };
 enum { SWIPE_UP, SWIPE_DOWN, SWIPE_LEFT, SWIPE_RIGHT };
+enum {
+	TOUCH_SWIPE_UP,
+	TOUCH_SWIPE_DOWN,
+	TOUCH_SWIPE_RIGHT,
+	TOUCH_SWIPE_LEFT,
+	TOUCH_SWIPE_UP_RIGHT,
+	TOUCH_SWIPE_UP_LEFT,
+	TOUCH_SWIPE_DOWN_LEFT,
+	TOUCH_SWIPE_DOWN_RIGHT,
+	TOUCH_SWIPE_NONE
+};
+
+enum {
+	EDGE_ANY,
+	EDGE_NONE,
+	EDGE_LEFT,
+	EDGE_RIGHT,
+	EDGE_TOP,
+	EDGE_BOTTOM,
+	CORNER_TOP_LEFT,
+	CORNER_TOP_RIGHT,
+	CORNER_BOTTOM_LEFT,
+	CORNER_BOTTOM_RIGHT,
+};
+
+enum { DISTANCE_ANY, DISTANCE_SHORT, DISTANCE_MEDIUM, DISTANCE_LONG };
 enum { CurNormal, CurPressed, CurMove, CurResize }; /* cursor */
 enum { XDGShell, LayerShell, X11 };					/* client types */
 enum { AxisUp, AxisDown, AxisLeft, AxisRight };		// 滚轮滚动的方向
@@ -455,12 +481,17 @@ typedef struct {
 typedef struct {
 	struct wl_list link;
 	int32_t touch_id;
+	double start_x, start_y, end_x, end_y;
+	bool consumed_by_gesture;
 } TouchPoint;
 
 typedef struct TouchGroup {
 	struct wl_list link;
 	struct wlr_touch *touch;
 	struct wl_list touch_points;
+	struct timespec time_down;
+	uint32_t pending_swipe;
+	uint32_t touch_points_pending_swipe;
 	Monitor *m;
 } TouchGroup;
 
@@ -700,6 +731,7 @@ static void touchup(struct wl_listener *listener, void *data);
 static void touchframe(struct wl_listener *listener, void *data);
 static void touchmotion(struct wl_listener *listener, void *data);
 static void touchcancel(struct wl_listener *listener, void *data);
+static void handle_touchcancel(struct wlr_touch_cancel_event *event);
 
 static void unlocksession(struct wl_listener *listener, void *data);
 static void unmaplayersurfacenotify(struct wl_listener *listener, void *data);
@@ -1034,6 +1066,7 @@ static struct wl_event_source *sync_keymap;
 #include "animation/layer.h"
 #include "animation/tag.h"
 #include "dispatch/bind_define.h"
+#include "dispatch/gesture.h"
 #include "ext-protocol/all.h"
 #include "fetch/fetch.h"
 #include "layout/arrange.h"
@@ -5886,10 +5919,8 @@ void touchdown(struct wl_listener *listener, void *data) {
 	double dx, dy;
 	struct wlr_surface *surface;
 	Client *c = NULL;
-	Monitor *m;
-
-	t->touch_id = event->touch_id;
-	wl_list_insert(&tg->touch_points, &t->link);
+	Monitor *m = NULL;
+	Monitor *m_iter;
 
 	wlr_idle_notifier_v1_notify_activity(idle_notifier, seat);
 
@@ -5899,8 +5930,8 @@ void touchdown(struct wl_listener *listener, void *data) {
 
 	// Map the input to the appropriate output, to ensure that rotation is
 	// handled.
-	wl_list_for_each(m, &mons, link) {
-		if (m == NULL || m->wlr_output == NULL) {
+	wl_list_for_each(m_iter, &mons, link) {
+		if (m_iter == NULL || m_iter->wlr_output == NULL) {
 			continue;
 		}
 		if (event->touch->output_name != NULL &&
@@ -5909,12 +5940,23 @@ void touchdown(struct wl_listener *listener, void *data) {
 		}
 
 		wlr_cursor_map_input_to_output(cursor, &event->touch->base,
-									   m->wlr_output);
+									   m_iter->wlr_output);
+		m = m_iter;
+		break;
 	}
 
+	/* ensure touch group has a monitor */
+	if (!tg->m)
+		tg->m = m; // TODO: properly handle output_name = null, instead of
+				   // falling back to last monitor in the list;
+
 	wlr_cursor_absolute_to_layout_coords(cursor, &event->touch->base, event->x,
 										 event->y, &lx, &ly);
 
+	t->touch_id = event->touch_id;
+	gesture_touch_down(tg, t, lx, ly);
+	wl_list_insert(&tg->touch_points, &t->link);
+
 	/* Find the client under the pointer and send the event along. */
 	xytonode(lx, ly, &surface, &c, NULL, &sx, &sy);
 	if (surface != NULL && wlr_surface_accepts_touch(surface, seat)) {
@@ -5942,7 +5984,7 @@ void touchdown(struct wl_listener *listener, void *data) {
 			.time_msec = event->time_msec,
 			.button = BTN_LEFT,
 			.state = WL_POINTER_BUTTON_STATE_PRESSED};
-		buttonpress(listener, &button_event);
+		buttonpress(NULL, &button_event);
 	}
 }
 
@@ -5960,6 +6002,15 @@ void touchup(struct wl_listener *listener, void *data) {
 	}
 	if (!t) // invalid or cancelled
 		return;
+
+	gesture_touch_up(tg, t);
+
+	if (t->consumed_by_gesture) {
+		wl_list_remove(&t->link);
+		free(t);
+		return;
+	}
+
 	wl_list_remove(&t->link);
 	free(t);
 
@@ -5970,7 +6021,7 @@ void touchup(struct wl_listener *listener, void *data) {
 				.time_msec = event->time_msec,
 				.button = BTN_LEFT,
 				.state = WL_POINTER_BUTTON_STATE_RELEASED};
-			buttonpress(listener, &button_event);
+			buttonpress(NULL, &button_event);
 
 			emulating_pointer_from_touch = false;
 		}
@@ -6017,10 +6068,13 @@ void touchmotion(struct wl_listener *listener, void *data) {
 	if (!t) // invalid or cancelled
 		return;
 
+	wlr_cursor_absolute_to_layout_coords(cursor, &event->touch->base, event->x,
+										 event->y, &lx, &ly);
+
+	gesture_touch_motion(tg, t, lx, ly);
+
 	if (emulating_pointer_from_touch) {
 		if (emulated_pointer_touch_id == event->touch_id) {
-			wlr_cursor_absolute_to_layout_coords(cursor, &event->touch->base,
-												 event->x, event->y, &lx, &ly);
 			dx = lx - cursor->x;
 			dy = ly - cursor->y;
 			motionnotify(event->time_msec, &event->touch->base, dx, dy, dx, dy);
@@ -6034,8 +6088,6 @@ void touchmotion(struct wl_listener *listener, void *data) {
 		return;
 	}
 
-	wlr_cursor_absolute_to_layout_coords(cursor, &event->touch->base, event->x,
-										 event->y, &lx, &ly);
 	surface = p->surface;
 	if (surface && surface->data) {
 		tree = surface->data;
@@ -6066,9 +6118,6 @@ void touchcancel(struct wl_listener *listener, void *data) {
 	TouchGroup *tg = event->touch->data;
 	TouchPoint *t = NULL;
 	TouchPoint *t_iter;
-	struct wlr_touch_point *p = NULL;
-	struct wl_client *client = NULL;
-	struct wlr_seat_client *seat_client = NULL;
 
 	wl_list_for_each(t_iter, &tg->touch_points, link) {
 		if (t_iter->touch_id == event->touch_id) {
@@ -6082,6 +6131,17 @@ void touchcancel(struct wl_listener *listener, void *data) {
 	wl_list_remove(&t->link);
 	free(t);
 
+	if (wl_list_length(&tg->touch_points) == 0)
+		tg->touch_points_pending_swipe = 0;
+
+	handle_touchcancel(event);
+}
+
+void handle_touchcancel(struct wlr_touch_cancel_event *event) {
+	struct wlr_touch_point *p = NULL;
+	struct wl_client *client = NULL;
+	struct wlr_seat_client *seat_client = NULL;
+
 	if (emulating_pointer_from_touch) {
 		if (emulated_pointer_touch_id == event->touch_id) {
 			struct wlr_pointer_button_event button_event = {
@@ -6089,7 +6149,7 @@ void touchcancel(struct wl_listener *listener, void *data) {
 				.time_msec = event->time_msec,
 				.button = BTN_LEFT,
 				.state = WL_POINTER_BUTTON_STATE_RELEASED};
-			buttonpress(listener, &button_event);
+			buttonpress(NULL, &button_event);
 
 			emulating_pointer_from_touch = false;
 		}