refactor: 使用 workspace_id_invalid() 替代直接比较 ZDWM_WORKSPACE_ID_INVALID

src/config/runtime_config.c

@@ -127,7 +127,7 @@ static bool
 rule_action_valid(const rule_action_t *action, size_t workspace_count) {
   if (!action) return false;
 
-  if (action->workspace == ZDWM_WORKSPACE_ID_INVALID) {
+  if (workspace_id_invalid(action->workspace)) {
     return action->switch_to_workspace || action->fullscreen ||
            action->maximize || action->floating;
   }

src/core/policy.c

@@ -92,7 +92,7 @@ static void route_map_request(
   bool have_rule_match = rules_resolve(rules, &e->metadata, &action);
   if (have_rule_match) {
     manage_window_command_t *data = &manage_window_cmd.as.manage_window;
-    if (action.workspace != ZDWM_WORKSPACE_ID_INVALID) {
+    if (!workspace_id_invalid(action.workspace)) {
       data->workspace = action.workspace;
     }
     if (action.floating) data->floating = true;

src/core/rules.c

@@ -55,7 +55,7 @@ rule_match_window(const rule_match_t *match, const window_metadata_t *meta) {
 static void rule_action_merge(const rule_action_t *src, rule_action_t *dest) {
   if (!src || !dest) return;
 
-  if (src->workspace != ZDWM_WORKSPACE_ID_INVALID) {
+  if (!workspace_id_invalid(src->workspace)) {
     dest->workspace = src->workspace;
   }
   dest->switch_to_workspace |= src->switch_to_workspace;

src/core/state.c

@@ -54,7 +54,7 @@ void state_init(
     workspace->layout_count = workspace_desc->layout_count;
     workspace->name         = p_strdup(workspace_desc->name);
 
-    if (output->current_workspace_id == ZDWM_WORKSPACE_ID_INVALID) {
+    if (workspace_id_invalid(output->current_workspace_id)) {
       output->current_workspace_id = workspace->id;
     }
   }
@@ -62,7 +62,7 @@ void state_init(
 
   for (size_t i = 0; i < state->output_count; i++) {
     const output_t *output = &state->outputs[i];
-    if (output->current_workspace_id == ZDWM_WORKSPACE_ID_INVALID) {
+    if (workspace_id_invalid(output->current_workspace_id)) {
       fatal("output at index %zu has no workspace", i);
     }
   }

src/core/types.h

@@ -105,3 +105,7 @@ typedef struct only_window_data_t {
 static inline bool window_id_invalid(window_id_t window_id) {
   return window_id == ZDWM_WINDOW_ID_INVALID;
 }
+
+static inline bool workspace_id_invalid(workspace_id_t workspace_id) {
+  return workspace_id == ZDWM_WORKSPACE_ID_INVALID;
+}