迁移窗口堆叠顺序到新方案（完成）

src/core/state.c

@@ -2,6 +2,7 @@
 
 #include <stddef.h>
 #include <string.h>
+#include <zdwm/types.h>
 
 #include "base/array.h"
 #include "base/log.h"
@@ -268,19 +269,15 @@ const window_t *state_window_add(state_t *state, const window_info_t *info) {
   window_id_t id = info->id;
   window_t *window = (window_t *)state_window_get(state, id);
   if (!window) {
-    size_t index = state->window_count;
-    size_t old_capacity = state->window_capacity;
     window =
       array_push(state->windows, state->window_count, state->window_capacity);
-    if (old_capacity != state->window_capacity) {
-      p_realloc(&state->stack_order, state->window_capacity);
-    }
+
+    layer_stack_t *layer = &state->stacks[info->layer_type];
+    layer_stack_append(layer, id);
 
     p_clear(window, 1);
     window->id = id;
     window->workspace_id = ZDWM_WORKSPACE_ID_INVALID;
-
-    state->stack_order[index] = id;
   }
 
   state_window_set_geometry_mode(state, id, info->geometry_mode);
@@ -323,6 +320,7 @@ void state_window_remove(state_t *state, window_id_t id) {
   if (!matched) return;
 
   window_t *window = &state->windows[index];
+  layer_type_t layer_type = window->layer;
   workspace_id_t workspace_id = window->workspace_id;
   p_delete(&window->title);
   p_delete(&window->app_id);
@@ -336,24 +334,13 @@ void state_window_remove(state_t *state, window_id_t id) {
   p_clear(window, 1);
   window->id = ZDWM_WINDOW_ID_INVALID;
   window->workspace_id = ZDWM_WORKSPACE_ID_INVALID;
-
-  matched = false;
-  for (size_t i = 0; i < state->window_count; i++) {
-    if (state->stack_order[i] == id) {
-      matched = true;
-      index = i;
-      break;
-    }
-  }
-  if (matched) {
-    for (size_t i = index + 1; i < state->window_count; i++) {
-      state->stack_order[i - 1] = state->stack_order[i];
-    }
-    state->stack_order[state->window_count - 1] = ZDWM_WINDOW_ID_INVALID;
-  }
-
   state->window_count--;
 
+  layer_stack_t *layer = &state->stacks[layer_type];
+  if (layer) {
+    layer_stack_remove(layer, id);
+  }
+
   workspace_t *workspace =
     (workspace_t *)state_workspace_get(state, workspace_id);
   if (workspace && workspace->focused_window_id == id) {
@@ -487,53 +474,22 @@ bool state_window_set_instance(state_t *state, window_id_t window_id,
   return true;
 }
 
-const window_id_t *state_stack_order(const state_t *state) {
-  return state->stack_order;
-}
-
-window_id_t state_stack_at(const state_t *state, size_t index) {
-  if (index >= state->window_count) return ZDWM_WINDOW_ID_INVALID;
-  return state->stack_order[index];
-}
-
 bool state_stack_raise(state_t *state, window_id_t window_id) {
-  bool matched = false;
-  size_t index = 0;
-  for (size_t i = 0; i < state->window_count; i++) {
-    if (state->stack_order[i] == window_id) {
-      matched = true;
-      index = i;
-      break;
-    }
-  }
+  const window_t *window = state_window_get(state, window_id);
+  if (!window) return false;
 
-  if (!matched) return false;
+  layer_stack_t *layer = &state->stacks[window->layer];
+  if (!layer) return false;
 
-  for (size_t i = index + 1; i < state->window_count; i++) {
-    state->stack_order[i - 1] = state->stack_order[i];
-  }
-  state->stack_order[state->window_count - 1] = window_id;
-
-  return true;
+  return layer_stack_raise(layer, window_id);
 }
 
 bool state_stack_lower(state_t *state, window_id_t window_id) {
-  bool matched = false;
-  size_t index = 0;
-  for (size_t i = 0; i < state->window_count; i++) {
-    if (state->stack_order[i] == window_id) {
-      matched = true;
-      index = i;
-      break;
-    }
-  }
+  const window_t *window = state_window_get(state, window_id);
+  if (!window) return false;
 
-  if (!matched) return false;
+  layer_stack_t *layer = &state->stacks[window->layer];
+  if (!layer) return false;
 
-  for (size_t i = index; i > 0; i--) {
-    state->stack_order[i] = state->stack_order[i - 1];
-  }
-  state->stack_order[0] = window_id;
-
-  return true;
+  return layer_stack_lower(layer, window_id);
 }

src/core/state.h

@@ -67,10 +67,7 @@ typedef struct state_t {
   size_t window_count;
   size_t window_capacity;
 
-  /* TODO: 过渡期全局 z-order 视图，后续由 layer stack 替代 */
-  window_id_t *stack_order;
-
-  /* TODO: 分层堆叠顺序：每层内部从低到高排列 */
+  /* 分层堆叠顺序：每层内部从低到高排列 */
   layer_stack_t stacks[ZDWM_WINDOW_LAYER_COUNT];
 } state_t;
 
@@ -179,14 +176,5 @@ bool state_window_set_class(state_t *state, window_id_t window_id,
 bool state_window_set_instance(state_t *state, window_id_t window_id,
                                const char *instance_name);
 
-/*
- * TODO: state 持有的过渡期堆叠顺序接口
- *
- * 这组接口服务于当前保留的全局 stack_order[] 视图；后续会由 layer stack
- * 取代。stack_order[] 从下到上排列，其长度恒等于 state_window_count(state)，
- * 因此不提供单独的 count 接口。
- */
-const window_id_t *state_stack_order(const state_t *state);
-window_id_t state_stack_at(const state_t *state, size_t index);
 bool state_stack_raise(state_t *state, window_id_t window_id);
 bool state_stack_lower(state_t *state, window_id_t window_id);

src/core/wm_desc.h

@@ -3,6 +3,7 @@
 #include <stddef.h>
 
 #include "base/memory.h"
+#include "core/layer.h"
 #include "core/types.h"
 
 /*
@@ -20,6 +21,7 @@ typedef struct window_info_t {
   const char *instance_name;
 
   window_geometry_mode_t geometry_mode;
+  layer_type_t layer_type;
   bool urgent;
   bool fixed_size;
   bool skip_taskbar;