Implement modifiers array in swaybar click events

include/sway/input/keyboard.h

@@ -5,6 +5,13 @@
 
 #define SWAY_KEYBOARD_PRESSED_KEYS_CAP 32
 
+struct modifier_key {
+	char *name;
+	uint32_t mod;
+};
+
+extern struct modifier_key modifiers[10];
+
 /**
  * Get modifier mask from modifier name.
  *

include/swaybar/ipc.h

@@ -1,6 +1,7 @@
 #ifndef _SWAYBAR_IPC_H
 #define _SWAYBAR_IPC_H
 #include <stdbool.h>
+#include <json.h>
 #include "swaybar/bar.h"
 
 bool ipc_initialize(struct swaybar *bar);
@@ -8,5 +9,6 @@ bool handle_ipc_readable(struct swaybar *bar);
 bool ipc_get_workspaces(struct swaybar *bar);
 void ipc_send_workspace_command(struct swaybar *bar, const char *ws);
 void ipc_execute_binding(struct swaybar *bar, struct swaybar_binding *bind);
+json_object *ipc_get_keyboard_modifiers(struct status_line *status);
 
 #endif

sway/input/keyboard.c

@@ -16,10 +16,7 @@
 #include "sway/ipc-server.h"
 #include "log.h"
 
-static struct modifier_key {
-	char *name;
-	uint32_t mod;
-} modifiers[] = {
+struct modifier_key modifiers[] = {
 	{ XKB_MOD_NAME_SHIFT, WLR_MODIFIER_SHIFT },
 	{ XKB_MOD_NAME_CAPS, WLR_MODIFIER_CAPS },
 	{ XKB_MOD_NAME_CTRL, WLR_MODIFIER_CTRL },

sway/ipc-json.c

@@ -17,6 +17,7 @@
 #include "sway/input/input-manager.h"
 #include "sway/input/cursor.h"
 #include "sway/input/seat.h"
+#include "sway/input/keyboard.h"
 #include "wlr-layer-shell-unstable-v1-protocol.h"
 #include "sway/desktop/idle_inhibit_v1.h"
 
@@ -1000,6 +1001,20 @@ json_object *ipc_json_describe_input(struct sway_input_device *device) {
 					layout ? json_object_new_string(layout) : NULL);
 			}
 		}
+
+		json_object *modifiers_json = json_object_new_array();
+		uint32_t keyboard_modifiers = wlr_keyboard_get_modifiers(keyboard);
+		for (int i = 0; i < (int)(sizeof(modifiers) / sizeof(struct modifier_key)); i++) {
+			if (keyboard_modifiers & modifiers[i].mod) {
+				json_object_array_add(modifiers_json,
+						json_object_new_string(modifiers[i].name));
+			}
+		}
+		if (json_object_array_length(modifiers_json) > 0) {
+			json_object_object_add(object, "xkb_modifiers", modifiers_json);
+		} else {
+			json_object_put(modifiers_json);
+		}
 	}
 
 	if (device->wlr_device->type == WLR_INPUT_DEVICE_POINTER) {

swaybar/i3bar.c

@@ -9,6 +9,7 @@
 #include "swaybar/bar.h"
 #include "swaybar/config.h"
 #include "swaybar/i3bar.h"
+#include "swaybar/ipc.h"
 #include "swaybar/input.h"
 #include "swaybar/status_line.h"
 
@@ -286,6 +287,10 @@ enum hotspot_event_handling i3bar_block_send_click(struct status_line *status,
 	json_object_object_add(event_json, "button",
 			json_object_new_int(event_to_x11_button(button)));
 	json_object_object_add(event_json, "event", json_object_new_int(button));
+	json_object *modifiers_json = ipc_get_keyboard_modifiers(status);
+	if (modifiers_json) {
+		json_object_object_add(event_json, "modifiers", modifiers_json);
+	}
 	if (status->float_event_coords) {
 		json_object_object_add(event_json, "x", json_object_new_double(x));
 		json_object_object_add(event_json, "y", json_object_new_double(y));

swaybar/ipc.c

@@ -606,3 +606,23 @@ bool handle_ipc_readable(struct swaybar *bar) {
 	free_ipc_response(resp);
 	return bar_is_dirty;
 }
+
+json_object *ipc_get_keyboard_modifiers(struct status_line *status) {
+	uint32_t len = 0;
+	char *buf = ipc_single_command(status->bar->ipc_socketfd,
+			IPC_GET_INPUTS, NULL, &len);
+	json_object *inputs_json = json_tokener_parse(buf);
+	free(buf);
+	if (!inputs_json) {
+		return NULL;
+	}
+	for (size_t i = 0; i < json_object_array_length(inputs_json); i++) {
+		json_object *input_json = json_object_array_get_idx(inputs_json, i);
+		json_object *modifiers_json = NULL;
+		json_object_object_get_ex(input_json, "xkb_modifiers", &modifiers_json);
+		if (modifiers_json) {
+			return modifiers_json;
+		}
+	}
+	return NULL;
+}