Implement focus_follows_mouse

sway/commands.c

@@ -9,30 +9,6 @@
 #include "log.h"
 #include "commands.h"
 
-int cmd_set(struct sway_config *config, int argc, char **argv) {
-	if (argc != 2) {
-		sway_log(L_ERROR, "Invalid set command (expected 2 arguments, got %d)", argc);
-		return 1;
-	}
-	struct sway_variable *var = malloc(sizeof(struct sway_variable));
-	var->name = malloc(strlen(argv[0]) + 1);
-	strcpy(var->name, argv[0]);
-	var->value = malloc(strlen(argv[1]) + 1);
-	strcpy(var->value, argv[1]);
-	list_add(config->symbols, var);
-	return 0;
-}
-
-int cmd_exit(struct sway_config *config, int argc, char **argv) {
-	if (argc != 0) {
-		sway_log(L_ERROR, "Invalid exit command (expected 1 arguments, got %d)", argc);
-		return 1;
-	}
-	// TODO: Some kind of clean up is probably in order
-	exit(0);
-	return 0;
-}
-
 struct modifier_key {
 	char *name;
 	uint32_t mod;
@@ -94,10 +70,46 @@ int cmd_bindsym(struct sway_config *config, int argc, char **argv) {
 	return 0;
 }
 
+int cmd_exit(struct sway_config *config, int argc, char **argv) {
+	if (argc != 0) {
+		sway_log(L_ERROR, "Invalid exit command (expected 1 arguments, got %d)", argc);
+		return 1;
+	}
+	// TODO: Some kind of clean up is probably in order
+	exit(0);
+	return 0;
+}
+
+
+int cmd_focus_follows_mouse(struct sway_config *config, int argc, char **argv) {
+	if (argc != 1) {
+		sway_log(L_ERROR, "Invalid focus_follows_mouse command (expected 1 arguments, got %d)", argc);
+		return 1;
+	}
+
+	config->focus_follows_mouse = !strcasecmp(argv[0], "yes");
+	return 0;
+}
+
+int cmd_set(struct sway_config *config, int argc, char **argv) {
+	if (argc != 2) {
+		sway_log(L_ERROR, "Invalid set command (expected 2 arguments, got %d)", argc);
+		return 1;
+	}
+	struct sway_variable *var = malloc(sizeof(struct sway_variable));
+	var->name = malloc(strlen(argv[0]) + 1);
+	strcpy(var->name, argv[0]);
+	var->value = malloc(strlen(argv[1]) + 1);
+	strcpy(var->value, argv[1]);
+	list_add(config->symbols, var);
+	return 0;
+}
+
 /* Keep alphabetized */
 struct cmd_handler handlers[] = {
 	{ "bindsym", cmd_bindsym },
 	{ "exit", cmd_exit },
+	{ "focus_follows_mouse", cmd_focus_follows_mouse },
 	{ "set", cmd_set },
 };
 

sway/config.c

@@ -8,14 +8,21 @@
 #include "commands.h"
 #include "config.h"
 
-struct sway_config *read_config(FILE *file) {
-	struct sway_config *config = malloc(sizeof(struct sway_config));
+void config_defaults(struct sway_config *config) {
 	config->symbols = create_list();
 	config->modes = create_list();
 	config->current_mode = malloc(sizeof(struct sway_mode));
 	config->current_mode->name = NULL;
 	config->current_mode->bindings = create_list();
 	list_add(config->modes, config->current_mode);
+	// Flags
+	config->focus_follows_mouse = true;
+	config->mouse_warping = true;
+}
+
+struct sway_config *read_config(FILE *file) {
+	struct sway_config *config = malloc(sizeof(struct sway_config));
+	config_defaults(config);
 
 	bool success = true;
 

sway/config.h

@@ -25,6 +25,10 @@ struct sway_config {
     list_t *symbols;
     list_t *modes;
     struct sway_mode *current_mode;
+
+    // Flags
+    bool focus_follows_mouse;
+    bool mouse_warping;
 };
 
 struct sway_config *read_config(FILE *file);

sway/handlers.c

@@ -83,3 +83,43 @@ bool handle_key(wlc_handle view, uint32_t time, const struct wlc_modifiers
 	}
 	return ret;
 }
+
+bool pointer_test(swayc_t *view, void *_origin) {
+	const struct wlc_origin *origin = _origin;
+	if (view->type == C_VIEW && origin->x >= view->x && origin->y >= view->y
+			&& origin->x < view->x + view->width && origin->y < view->y + view->height) {
+		return true;
+	}
+	return false;
+}
+
+struct wlc_origin mouse_origin;
+
+bool handle_pointer_motion(wlc_handle view, uint32_t time, const struct wlc_origin *origin) {
+	mouse_origin = *origin;
+	if (!config->focus_follows_mouse) {
+		return true;
+	}
+	swayc_t *c = find_container(&root_container, pointer_test, (void *)origin);
+	swayc_t *focused = get_focused_container(&root_container);
+	if (c && c != focused) {
+		sway_log(L_DEBUG, "Switching focus to %p", c);
+		focus_view(c);
+	}
+	return true;
+}
+
+bool handle_pointer_button(wlc_handle view, uint32_t time, const struct wlc_modifiers *modifiers,
+		uint32_t button, enum wlc_button_state state) {
+	if (state == WLC_BUTTON_STATE_PRESSED) {
+		swayc_t *c = find_container(&root_container, pointer_test, &mouse_origin);
+		swayc_t *focused = get_focused_container(&root_container);
+		if (c && c != focused) {
+			sway_log(L_DEBUG, "Switching focus to %p", c);
+			focus_view(c);
+			return false;
+		}
+		return true;
+	}
+	return true;
+}

sway/handlers.h

@@ -16,4 +16,8 @@ void handle_view_geometry_request(wlc_handle view, const struct wlc_geometry* ge
 bool handle_key(wlc_handle view, uint32_t time, const struct wlc_modifiers
 		*modifiers, uint32_t key, uint32_t sym, enum wlc_key_state state);
 
+bool handle_pointer_motion(wlc_handle view, uint32_t time, const struct wlc_origin *origin);
+bool handle_pointer_button(wlc_handle view, uint32_t time, const struct wlc_modifiers *modifiers,
+		uint32_t button, enum wlc_button_state state);
+
 #endif

sway/layout.c

@@ -7,6 +7,25 @@
 
 swayc_t root_container;
 
+swayc_t *find_container(swayc_t *container, bool (*test)(swayc_t *view, void *data), void *data) {
+	if (!container->children) {
+		return NULL;
+	}
+	int i;
+	for (i = 0; i < container->children->length; ++i) {
+		swayc_t *child = container->children->items[i];
+		if (test(child, data)) {
+			return child;
+		} else {
+			swayc_t *_ = find_container(child, test, data);
+			if (_) {
+				return _;
+			}
+		}
+	}
+	return NULL;
+}
+
 void arrange_windows(swayc_t *container, int width, int height) {
 	int i;
 	if (width == -1 || height == -1) {

sway/layout.h

@@ -51,6 +51,8 @@ void destroy_view(swayc_t *view);
 void add_view(wlc_handle view);
 void focus_view(swayc_t *view);
 void arrange_windows(swayc_t *container, int width, int height);
+swayc_t *find_container(swayc_t *container, bool (*test)(swayc_t *view, void *data), void *data);
+swayc_t *get_focused_container(swayc_t *parent);
 
 swayc_t *get_swayc_for_handle(wlc_handle handle, swayc_t *parent);
 

sway/main.c

@@ -48,6 +48,10 @@ int main(int argc, char **argv) {
 		},
 		.keyboard = {
 			.key = handle_key
+		},
+		.pointer = {
+			.motion = handle_pointer_motion,
+			.button = handle_pointer_button
 		}
 	};