支持 client 窗口浮动

src/action.c

@@ -75,3 +75,9 @@ void raise_or_run(const user_action_arg_t *arg) {
   user_action_arg_t arguments = {.ptr = command};
   spawn(&arguments);
 }
+
+void toggle_client_floating(const user_action_arg_t *arg) {
+  if (!wm.client_focused) return;
+
+  client_set_floating(wm.client_focused, !wm.client_focused->floating);
+}

src/action.h

@@ -55,3 +55,4 @@ void send_client_to_next_monitor(const user_action_arg_t *arg);
 void spawn(const user_action_arg_t *arg);
 void quit(const user_action_arg_t *arg);
 void raise_or_run(const user_action_arg_t *arg);
+void toggle_client_floating(const user_action_arg_t *arg);

src/client.c

@@ -178,11 +178,12 @@ void client_manage(xcb_window_t window,
                    xcb_get_geometry_reply_t *geometry_reply) {
   client_t *c = p_new(client_t, 1);
   c->window = window;
-  c->geometry.x = geometry_reply->x;
-  c->geometry.y = geometry_reply->y;
-  c->geometry.width = geometry_reply->width;
-  c->geometry.height = geometry_reply->height;
-  c->border_width = geometry_reply->border_width;
+  c->old_geometry.x = geometry_reply->x;
+  c->old_geometry.y = geometry_reply->y;
+  c->old_geometry.width = geometry_reply->width;
+  c->old_geometry.height = geometry_reply->height;
+  c->geometry = c->old_geometry;
+  c->old_border_width = geometry_reply->border_width;
 
   {
     const xcb_params_cw_t params = {
@@ -345,6 +346,22 @@ void client_update_wm_hints(client_t *client) {
   }
 }
 
+void client_set_floating(client_t *client, bool floating) {
+  if (client->floating == floating || client->fullscreen) return;
+
+  logger("== client set floating: %s\n", floating ? "true" : "false");
+  logger("== old geometry: x -> %d, y -> %d, width -> %u, height -> %u\n",
+         client->old_geometry.x, client->old_geometry.y,
+         client->old_geometry.width, client->old_geometry.height);
+  client->floating = floating;
+  if (floating) {
+    client_apply_workarea_geometry(client, client->old_geometry);
+    client->old_geometry = client->geometry;
+  }
+
+  monitor_arrange(client->monitor);
+}
+
 static void update_client_list(void) {
   xcb_connection_t *conn = wm.xcb_conn;
   xcb_window_t root = wm.screen->root;
@@ -379,17 +396,36 @@ void client_unmanage(client_t *client) {
   xcb_flush(wm.xcb_conn);
 }
 
-void client_apply_task_geometry(client_t *client, task_in_tag_t *task) {
-  if (!client || !task || client != task->client) return;
+void client_apply_geometry(client_t *client, area_t geometry) {
+  if (client->geometry.x != geometry.x || client->geometry.y != geometry.y) {
+    client_move_to(client, geometry.x, geometry.y);
+  }
+  if (client->geometry.width != geometry.width ||
+      client->geometry.height != geometry.height) {
+    client_resize(client, geometry.width, geometry.height);
+  }
+}
 
-  if (task->geometry.x != client->geometry.x ||
-      task->geometry.y != client->geometry.y) {
-    client_move_to(client, task->geometry.x, task->geometry.y);
+/**
+ * @brief 调整 client 的几何信息但需让 client 任在其 monitor 的 workarea 中
+ * @param client 要调整几何信息的 client
+ * @param geometry 目标几何信息
+ */
+void client_apply_workarea_geometry(client_t *client, area_t geometry) {
+  area_t workarea = client->monitor->workarea;
+  uint16_t width = MIN(geometry.width, workarea.width);
+  uint16_t height = MIN(geometry.height, workarea.height);
+  int16_t x = MAX(geometry.x, workarea.x);
+  int16_t y = MAX(geometry.y, workarea.y);
+  if (x + width + client->border_width * 2 > workarea.x + workarea.width) {
+    x = workarea.x + workarea.width - width - client->border_width * 2;
   }
-  if (task->geometry.width != client->geometry.width ||
-      task->geometry.height != client->geometry.height) {
-    client_resize(client, task->geometry.width, task->geometry.height);
+  if (y + height + client->border_width * 2 > workarea.y + workarea.height) {
+    y = workarea.y + workarea.width - height - client->border_width * 2;
   }
+
+  area_t rect = {.x = x, .y = y, .width = width, .height = height};
+  client_apply_geometry(client, rect);
 }
 
 void client_focus(client_t *client) {

src/client.h

@@ -6,7 +6,7 @@
 #include "types.h"
 
 client_t *client_get_by_window(xcb_window_t window);
-client_t *client_get_next_by_class(client_t *current,const char *class);
+client_t *client_get_next_by_class(client_t *current, const char *class);
 task_in_tag_t *client_get_task_in_tag(client_t *client, tag_t *tag);
 task_in_tag_t *client_get_next_task_in_tag(client_t *client, tag_t *tag);
 task_in_tag_t *client_get_previous_task_in_tag(client_t *client, tag_t *tag);
@@ -48,7 +48,8 @@ void client_set_leader_window(client_t *client, xcb_window_t leader_window);
 
 void client_kill(client_t *client);
 void client_unmanage(client_t *client);
-void client_apply_task_geometry(client_t *client, task_in_tag_t *task);
+void client_apply_geometry(client_t *client, area_t geometry);
+void client_apply_workarea_geometry(client_t *client, area_t geometry);
 
 void client_focus(client_t *client);
 void client_stack_raise(client_t *client);

src/default_config.h

@@ -86,6 +86,8 @@ static const keyboard_t key_list[] = {
   TAGKEYS(XK_9, 1 << 8),
 
   {modifier_super, XK_o, send_client_to_next_monitor, {0}},
+
+  {modifier_super | modifier_control, XK_space, toggle_client_floating, {0}},
 };
 
 static const layout_t layout_list[] = {

src/event.c

@@ -68,7 +68,7 @@ static void configure_request(xcb_configure_request_event_t *ev) {
         task->geometry.width = ev->width;
       if (ev->value_mask & XCB_CONFIG_WINDOW_HEIGHT)
         task->geometry.height = ev->height;
-      client_apply_task_geometry(client, task);
+      client_apply_geometry(client, task->geometry);
     }
   } else {
     uint16_t value_mask = ev->value_mask;

src/monitor.c

@@ -274,7 +274,11 @@ void monitor_arrange(monitor_t *monitor) {
 
     task_in_tag_t *task = client_get_task_in_tag(c, tag);
     if (task) {
-      client_apply_task_geometry(c, task);
+      if (client_need_layout(c)) {
+        client_apply_geometry(c, task->geometry);
+      } else {
+        client_apply_geometry(c, c->geometry);
+      }
     } else {
       int16_t x = -client_width(c);
       int16_t y = -client_height(c);

src/types.h

@@ -26,9 +26,11 @@ struct client_t {
   monitor_t *monitor;
   uint32_t tags;
 
+  area_t old_geometry;
   area_t geometry;
-  color_t *border_color;
   uint16_t border_width;
+  uint16_t old_border_width;
+  color_t *border_color;
 
   bool floating;
   bool fullscreen;

src/utils.h

@@ -88,6 +88,11 @@ static inline void logger(const char *format, ...) {
 #define logger(format, ...) printf(format, ##__VA_ARGS__)
 #endif
 
+#ifdef MIN
+#undef MIN
+#define MIN(a, b) (((a) < (b)) ? (a) : (b))
+#endif
+
 #ifdef MAX
 #undef MAX
 #define MAX(a, b) (((a) > (b)) ? (a) : (b))