Make mouse key used for drag/resize configurable

This makes it possible to define what mouse button key (left|right) to
use for dragging/resizing.

include/config.h

@@ -109,6 +109,8 @@ struct sway_config {
 	struct sway_mode *current_mode;
 	struct bar_config bar;
 	uint32_t floating_mod;
+	uint32_t dragging_key;
+	uint32_t resizing_key;
 	enum swayc_layouts default_orientation;
 	enum swayc_layouts default_layout;
 

sway/commands.c

@@ -375,14 +375,14 @@ static struct cmd_results *cmd_floating(int argc, char **argv) {
 
 static struct cmd_results *cmd_floating_mod(int argc, char **argv) {
 	struct cmd_results *error = NULL;
-	if ((error = checkarg(argc, "floating_modifier", EXPECTED_EQUAL_TO, 1))) {
+	if ((error = checkarg(argc, "floating_modifier", EXPECTED_AT_LEAST, 1))) {
 		return error;
 	}
 	int i, j;
 	list_t *split = split_string(argv[0], "+");
 	config->floating_mod = 0;
 
-	// set modifer keys
+	// set modifier keys
 	for (i = 0; i < split->length; ++i) {
 		for (j = 0; j < (int)(sizeof(modifiers) / sizeof(struct modifier_key)); ++j) {
 			if (strcasecmp(modifiers[j].name, split->items[i]) == 0) {
@@ -395,6 +395,19 @@ static struct cmd_results *cmd_floating_mod(int argc, char **argv) {
 		error = cmd_results_new(CMD_INVALID, "floating_modifier", "Unknown keys %s", argv[0]);
 		return error;
 	}
+
+	if (argc >= 2) {
+		if (strcasecmp("inverse", argv[1]) == 0) {
+			config->dragging_key = M_RIGHT_CLICK;
+			config->resizing_key = M_LEFT_CLICK;
+		} else if (strcasecmp("normal", argv[1]) == 0) {
+			config->dragging_key = M_LEFT_CLICK;
+			config->resizing_key = M_RIGHT_CLICK;
+		} else {
+			error = cmd_results_new(CMD_INVALID, "floating_modifier", "Invalid definition %s", argv[1]);
+			return error;
+		}
+	}
 	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
 }
 

sway/config.c

@@ -101,6 +101,8 @@ static void config_defaults(struct sway_config *config) {
 	list_add(config->modes, config->current_mode);
 
 	config->floating_mod = 0;
+	config->dragging_key = M_LEFT_CLICK;
+	config->resizing_key = M_RIGHT_CLICK;
 	config->default_layout = L_NONE;
 	config->default_orientation = L_NONE;
 	// Flags

sway/input_state.c

@@ -194,8 +194,16 @@ void center_pointer_on(swayc_t *view) {
 
 // Mode set left/right click
 
-static void pointer_mode_set_left(void) {
-	set_initial_view(pointer_state.left.view);
+static void pointer_mode_set_dragging(void) {
+	switch (config->dragging_key) {
+	case M_LEFT_CLICK:
+		set_initial_view(pointer_state.left.view);
+		break;
+	case M_RIGHT_CLICK:
+		set_initial_view(pointer_state.right.view);
+		break;
+	}
+
 	if (initial.ptr->is_floating) {
 		pointer_state.mode = M_DRAGGING | M_FLOATING;
 	} else {
@@ -208,8 +216,15 @@ static void pointer_mode_set_left(void) {
 	}
 }
 
-static void pointer_mode_set_right(void) {
-	set_initial_view(pointer_state.right.view);
+static void pointer_mode_set_resizing(void) {
+	switch (config->resizing_key) {
+	case M_LEFT_CLICK:
+		set_initial_view(pointer_state.left.view);
+		break;
+	case M_RIGHT_CLICK:
+		set_initial_view(pointer_state.right.view);
+		break;
+	}
 	// Setup locking information
 	int midway_x = initial.ptr->x + initial.ptr->width/2;
 	int midway_y = initial.ptr->y + initial.ptr->height/2;
@@ -233,15 +248,19 @@ void pointer_mode_set(uint32_t button, bool condition) {
 	// switch on drag/resize mode
 	switch (pointer_state.mode & (M_DRAGGING | M_RESIZING)) {
 	case M_DRAGGING:
-	// end drag mode when left click is unpressed
-		if (!pointer_state.left.held) {
+		// end drag mode when 'dragging' click is unpressed
+		if (config->dragging_key == M_LEFT_CLICK && !pointer_state.left.held) {
+			pointer_state.mode = 0;
+		} else if (config->dragging_key == M_RIGHT_CLICK && !pointer_state.right.held) {
 			pointer_state.mode = 0;
 		}
 		break;
 
 	case M_RESIZING:
-	// end resize mode when right click is unpressed
-		if (!pointer_state.right.held) {
+		// end resize mode when 'resizing' click is unpressed
+		if (config->resizing_key == M_LEFT_CLICK && !pointer_state.left.held) {
+			pointer_state.mode = 0;
+		} else if (config->resizing_key == M_RIGHT_CLICK && !pointer_state.right.held) {
 			pointer_state.mode = 0;
 		}
 		break;
@@ -255,19 +274,27 @@ void pointer_mode_set(uint32_t button, bool condition) {
 
 		// Set mode depending on current button press
 		switch (button) {
-		// Start dragging mode
+		// Start left-click mode
 		case M_LEFT_CLICK:
 			// if button release dont do anything
 			if (pointer_state.left.held) {
-				pointer_mode_set_left();
+				if (config->dragging_key == M_LEFT_CLICK) {
+					pointer_mode_set_dragging();
+				} else if (config->resizing_key == M_LEFT_CLICK) {
+					pointer_mode_set_resizing();
+				}
 			}
 			break;
 
-		// Start resize mode
+		// Start right-click mode
 		case M_RIGHT_CLICK:
 			// if button release dont do anyhting
 			if (pointer_state.right.held) {
-				pointer_mode_set_right();
+				if (config->dragging_key == M_RIGHT_CLICK) {
+					pointer_mode_set_dragging();
+				} else if (config->resizing_key == M_RIGHT_CLICK) {
+					pointer_mode_set_resizing();
+				}
 			}
 			break;
 		}
@@ -287,8 +314,17 @@ void pointer_mode_update(void) {
 	switch (pointer_state.mode) {
 	case M_FLOATING | M_DRAGGING:
 		// Update position
-		dx -= pointer_state.left.x;
-		dy -= pointer_state.left.y;
+		switch (config->resizing_key) {
+		case M_LEFT_CLICK:
+			dx -= pointer_state.left.x;
+			dy -= pointer_state.left.y;
+			break;
+		case M_RIGHT_CLICK:
+			dx -= pointer_state.right.x;
+			dy -= pointer_state.right.y;
+			break;
+		}
+
 		if (initial.x + dx != initial.ptr->x) {
 			initial.ptr->x = initial.x + dx;
 		}
@@ -299,9 +335,19 @@ void pointer_mode_update(void) {
 		break;
 
 	case M_FLOATING | M_RESIZING:
-		dx -= pointer_state.right.x;
-		dy -= pointer_state.right.y;
-		initial.ptr = pointer_state.right.view;
+		switch (config->resizing_key) {
+		case M_LEFT_CLICK:
+			dx -= pointer_state.left.x;
+			dy -= pointer_state.left.y;
+			initial.ptr = pointer_state.left.view;
+			break;
+		case M_RIGHT_CLICK:
+			dx -= pointer_state.right.x;
+			dy -= pointer_state.right.y;
+			initial.ptr = pointer_state.right.view;
+			break;
+		}
+
 		if (lock.left) {
 			if (initial.w + dx > min_sane_w) {
 				initial.ptr->width = initial.w + dx;
@@ -341,8 +387,17 @@ void pointer_mode_update(void) {
 		break;
 
 	case M_TILING | M_RESIZING:
-		dx -= pointer_state.right.x;
-		dy -= pointer_state.right.y;
+		switch (config->resizing_key) {
+		case M_LEFT_CLICK:
+			dx -= pointer_state.left.x;
+			dy -= pointer_state.left.y;
+			break;
+		case M_RIGHT_CLICK:
+			dx -= pointer_state.right.x;
+			dy -= pointer_state.right.y;
+			break;
+		}
+
 		// resize if we can
 		if (initial.horiz.ptr) {
 			if (lock.left) {