Add support for workspace_min_width bar option.

sway/commands/bar.c

@@ -36,6 +36,7 @@ static struct cmd_handler bar_handlers[] = {
 	{ "unbindcode", bar_cmd_unbindcode },
 	{ "unbindsym", bar_cmd_unbindsym },
 	{ "workspace_buttons", bar_cmd_workspace_buttons },
+	{ "workspace_min_width", bar_cmd_workspace_min_width },
 	{ "wrap_scroll", bar_cmd_wrap_scroll },
 };
 

sway/commands/bar/workspace_min_width.c

@@ -0,0 +1,33 @@
+#include <stdlib.h>
+#include <strings.h>
+#include "config.h"
+#include "sway/commands.h"
+#include "sway/config.h"
+#include "log.h"
+
+struct cmd_results *bar_cmd_workspace_min_width(int argc, char **argv) {
+	struct cmd_results *error = NULL;
+	if ((error = checkarg(argc, "workspace_min_width", EXPECTED_AT_LEAST, 1))) {
+		return error;
+	}
+
+	struct bar_config *bar = config->current_bar;
+
+	char *end;
+	int min_width = strtol(argv[0], &end, 10);
+	if (min_width < 0 || (*end != '\0' && strcasecmp(end, "px") != 0)) {
+		return cmd_results_new(CMD_INVALID,
+				"[Bar %s] Invalid minimum workspace button width value: %s",
+				bar->id, argv[0]);
+	}
+
+	if (argc == 2 && strcasecmp(argv[1], "px") != 0) {
+		return cmd_results_new(CMD_INVALID,
+				"Expected 'workspace_min_width <px> [px]'");
+	}
+
+	sway_log(SWAY_DEBUG, "[Bar %s] Setting minimum workspace button width to %d",
+			bar->id, min_width);
+	config->current_bar->workspace_min_width = min_width;
+	return cmd_results_new(CMD_SUCCESS, NULL);
+}

sway/config/bar.c

@@ -105,6 +105,7 @@ struct bar_config *default_bar_config(void) {
 	bar->modifier = get_modifier_mask_by_name("Mod4");
 	bar->status_padding = 1;
 	bar->status_edge_padding = 3;
+	bar->workspace_min_width = 0;
 	if (!(bar->mode = strdup("dock"))) {
 	       goto cleanup;
 	}

sway/ipc-json.c

@@ -1102,6 +1102,8 @@ json_object *ipc_json_describe_bar_config(struct bar_config *bar) {
 			json_object_new_boolean(bar->strip_workspace_numbers));
 	json_object_object_add(json, "strip_workspace_name",
 			json_object_new_boolean(bar->strip_workspace_name));
+	json_object_object_add(json, "workspace_min_width",
+			json_object_new_int(bar->workspace_min_width));
 	json_object_object_add(json, "binding_mode_indicator",
 			json_object_new_boolean(bar->binding_mode_indicator));
 	json_object_object_add(json, "verbose",

sway/meson.build

@@ -144,6 +144,7 @@ sway_sources = files(
 	'commands/bar/tray_output.c',
 	'commands/bar/tray_padding.c',
 	'commands/bar/workspace_buttons.c',
+	'commands/bar/workspace_min_width.c',
 	'commands/bar/wrap_scroll.c',
 
 	'commands/input/accel_profile.c',

sway/sway-bar.5.scd

@@ -138,6 +138,11 @@ runtime.
 *workspace_buttons* yes|no
 	Enables or disables workspace buttons on the bar. Default is _yes_.
 
+*workspace_min_width* <px> [px]
+	Specifies the minimum width for the workspace buttons on the bar. Default is _0_.
+
+	This setting also applies to the current binding mode indicator.
+
 ## TRAY
 
 Swaybar provides a system tray where third-party applications may place icons.

sway/sway-ipc.7.scd

@@ -829,6 +829,9 @@ their value mean can be found in *sway-bar*(5):
 |- workspace_buttons
 :  boolean
 :  Whether to display the workspace buttons on the bar
+|- workspace_min_width
+:  integer
+:  Minimum width in px for the workspace buttons on the bar
 |- binding_mode_indicator
 :  boolean
 :  Whether to display the current binding mode on the bar
@@ -931,6 +934,7 @@ containing the _#RRGGBBAA_ representation of the color:
 	"status_padding": 1,
 	"status_edge_padding": 3,
 	"workspace_buttons": true,
+	"workspace_min_width": 0,
 	"binding_mode_indicator": true,
 	"verbose": false,
 	"pango_markup": false,