opt: keybaord layout config support hotreload to apply

src/config/parse_config.h

@@ -880,18 +880,26 @@ void parse_config_line(Config *config, const char *line) {
 		config->drag_tile_to_tile = atoi(value);
 	} else if (strcmp(key, "swipe_min_threshold") == 0) {
 		config->swipe_min_threshold = atoi(value);
-	} else if (!xkb_rules.rules && strcmp(key, "xkb_rules_rules") == 0) {
-		xkb_rules.rules = strdup(value);
-	} else if (!xkb_rules.model && strcmp(key, "xkb_rules_model") == 0) {
-		xkb_rules.model = strdup(value);
-	} else if (!xkb_rules.layout && strcmp(key, "xkb_rules_layout") == 0) {
-		char *new_layouts_str = malloc(256); // 不要释放，只赋值一次
-		strcpy(new_layouts_str, value);
-		xkb_rules.layout = new_layouts_str;
-	} else if (!xkb_rules.variant && strcmp(key, "xkb_rules_variant") == 0) {
-		xkb_rules.variant = strdup(value);
-	} else if (!xkb_rules.options && strcmp(key, "xkb_rules_options") == 0) {
-		xkb_rules.options = strdup(value);
+	} else if (strcmp(key, "xkb_rules_rules") == 0) {
+		strncpy(xkb_rules_rules, value, sizeof(xkb_rules_rules) - 1);
+		xkb_rules_rules[sizeof(xkb_rules_rules) - 1] =
+			'\0'; // 确保字符串以 null 结尾
+	} else if (strcmp(key, "xkb_rules_model") == 0) {
+		strncpy(xkb_rules_model, value, sizeof(xkb_rules_model) - 1);
+		xkb_rules_model[sizeof(xkb_rules_model) - 1] =
+			'\0'; // 确保字符串以 null 结尾
+	} else if (strcmp(key, "xkb_rules_layout") == 0) {
+		strncpy(xkb_rules_layout, value, sizeof(xkb_rules_layout) - 1);
+		xkb_rules_layout[sizeof(xkb_rules_layout) - 1] =
+			'\0'; // 确保字符串以 null 结尾
+	} else if (strcmp(key, "xkb_rules_variant") == 0) {
+		strncpy(xkb_rules_variant, value, sizeof(xkb_rules_variant) - 1);
+		xkb_rules_variant[sizeof(xkb_rules_variant) - 1] =
+			'\0'; // 确保字符串以 null 结尾
+	} else if (strcmp(key, "xkb_rules_options") == 0) {
+		strncpy(xkb_rules_options, value, sizeof(xkb_rules_options) - 1);
+		xkb_rules_options[sizeof(xkb_rules_options) - 1] =
+			'\0'; // 确保字符串以 null 结尾
 	} else if (strcmp(key, "scroller_proportion_preset") == 0) {
 		// 1. 统计 value 中有多少个逗号，确定需要解析的浮点数个数
 		int count = 0; // 初始化为 0
@@ -2230,6 +2238,7 @@ void reload_config(const Arg *arg) {
 	parse_config();
 	init_baked_points();
 	handlecursoractivity();
+	reset_keyboard_layout();
 	run_exec();
 
 	// reset border width when config change

src/config/preset_config.h

@@ -102,13 +102,25 @@ Layout layouts[] = {
 };
 
 /* keyboard */
+
+/*
+	only layout can modify after fisrt init
+	other fields change will be ignored.
+*/
+char xkb_rules_rules[256];
+char xkb_rules_model[256];
+char xkb_rules_layout[256];
+char xkb_rules_variant[256];
+char xkb_rules_options[256];
+
 struct xkb_rule_names xkb_rules = {
 	/* can specify fields: rules, model, layout, variant, options */
 	/* example:
 	.options = "ctrl:nocaps",
 	*/
-	.rules = NULL,	 .model = NULL,	  .layout = NULL,
-	.variant = NULL, .options = NULL,
+	.rules = xkb_rules_rules,	  .model = xkb_rules_model,
+	.layout = xkb_rules_layout,	  .variant = xkb_rules_variant,
+	.options = xkb_rules_options,
 };
 
 int repeat_rate = 25;

src/maomao.c

@@ -650,6 +650,7 @@ static Client *center_select(Monitor *m);
 static void handlecursoractivity(void);
 static int hidecursor(void *data);
 static bool check_hit_no_border(Client *c);
+static void reset_keyboard_layout(void);
 
 #include "data/static_keymap.h"
 #include "dispatch/dispatch.h"
@@ -5797,6 +5798,89 @@ char *get_layout_abbr(const char *full_name) {
 	return strdup("xx");
 }
 
+void reset_keyboard_layout(void) {
+	if (!kb_group || !kb_group->wlr_group || !seat) {
+		wlr_log(WLR_ERROR, "Invalid keyboard group or seat");
+		return;
+	}
+
+	struct wlr_keyboard *keyboard = &kb_group->wlr_group->keyboard;
+	if (!keyboard || !keyboard->keymap) {
+		wlr_log(WLR_ERROR, "Invalid keyboard or keymap");
+		return;
+	}
+
+	// Get current layout
+	xkb_layout_index_t current = xkb_state_serialize_layout(
+		keyboard->xkb_state, XKB_STATE_LAYOUT_EFFECTIVE);
+	const int num_layouts = xkb_keymap_num_layouts(keyboard->keymap);
+	if (num_layouts < 1) {
+		wlr_log(WLR_INFO, "No layouts available");
+		return;
+	}
+
+	// Create context
+	struct xkb_context *context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
+	if (!context) {
+		wlr_log(WLR_ERROR, "Failed to create XKB context");
+		return;
+	}
+
+	// Get layout abbreviations
+	char **layout_ids = calloc(num_layouts, sizeof(char *));
+	if (!layout_ids) {
+		wlr_log(WLR_ERROR, "Failed to allocate layout IDs");
+		goto cleanup_context;
+	}
+
+	for (int i = 0; i < num_layouts; i++) {
+		layout_ids[i] =
+			get_layout_abbr(xkb_keymap_layout_get_name(keyboard->keymap, i));
+		if (!layout_ids[i]) {
+			wlr_log(WLR_ERROR, "Failed to get layout abbreviation");
+			goto cleanup_layouts;
+		}
+	}
+
+	// Keep the same rules but just reapply them
+	struct xkb_rule_names rules = xkb_rules;
+
+	// Create new keymap with current rules
+	struct xkb_keymap *new_keymap =
+		xkb_keymap_new_from_names(context, &rules, XKB_KEYMAP_COMPILE_NO_FLAGS);
+	if (!new_keymap) {
+		wlr_log(WLR_ERROR, "Failed to create keymap for layouts: %s",
+				rules.layout);
+		goto cleanup_layouts;
+	}
+
+	// Apply the same keymap (this will reset the layout state)
+	uint32_t depressed = keyboard->modifiers.depressed;
+	uint32_t latched = keyboard->modifiers.latched;
+	uint32_t locked = keyboard->modifiers.locked;
+
+	wlr_keyboard_set_keymap(keyboard, new_keymap);
+
+	wlr_keyboard_notify_modifiers(keyboard, depressed, latched, locked, 0);
+	keyboard->modifiers.group = current; // Keep the same layout index
+
+	// Update seat
+	wlr_seat_set_keyboard(seat, keyboard);
+	wlr_seat_keyboard_notify_modifiers(seat, &keyboard->modifiers);
+
+	// Cleanup
+	xkb_keymap_unref(new_keymap);
+
+cleanup_layouts:
+	for (int i = 0; i < num_layouts; i++) {
+		free(layout_ids[i]);
+	}
+	free(layout_ids);
+
+cleanup_context:
+	xkb_context_unref(context);
+}
+
 void switch_keyboard_layout(const Arg *arg) {
 	if (!kb_group || !kb_group->wlr_group || !seat) {
 		wlr_log(WLR_ERROR, "Invalid keyboard group or seat");