添加记录和恢复光标在每个 monitor 中的位置功能

src/base.h

@@ -11,3 +11,7 @@ typedef struct extent_in_bar_t {
   int16_t start;
   int16_t end;
 } extent_in_bar_t;
+
+typedef struct point_t {
+  int16_t x, y;
+} point_t;

src/monitor.c

@@ -285,3 +285,21 @@ void monitor_arrange(monitor_t *monitor) {
   }
   xcb_flush(wm.xcb_conn);
 }
+
+void monitor_save_cursor_point(monitor_t *monitor) {
+  monitor->cursor_position = xcursor_query_pointer_position();
+  monitor->position_inited = true;
+}
+
+void monitor_restore_cursor_point(monitor_t *monitor) {
+  if (monitor->position_inited) {
+    xcursor_set_pointer_position(monitor->cursor_position);
+    return;
+  }
+
+  point_t point = xcursor_query_pointer_position();
+  monitor_t *m = wm_get_monitor_by_point(point);
+  monitor->cursor_position.x = point.x - m->geometry.x + monitor->geometry.x;
+  monitor->cursor_position.y = point.y - m->geometry.y + monitor->geometry.y;
+  monitor->position_inited = true;
+}

src/monitor.h

@@ -12,3 +12,5 @@ void monitor_clean(monitor_t *monitor);
 void monitor_init_bar(monitor_t *monitor);
 void monitor_draw_bar(monitor_t *monitor);
 void monitor_arrange(monitor_t *monitor);
+void monitor_save_cursor_point(monitor_t *monitor);
+void monitor_restore_cursor_point(monitor_t *monitor);

src/types.h

@@ -61,6 +61,9 @@ struct monitor_t {
   extent_in_bar_t layout_symbol_extent;
 
   xcb_window_t bar_window;
+
+  point_t cursor_position;
+  bool position_inited;
 };
 
 struct tag_t {

src/wm.c

@@ -409,6 +409,16 @@ void wm_restack_clients(void) {
   xcb_flush(wm.xcb_conn);
 }
 
+monitor_t *wm_get_monitor_by_point(point_t point) {
+  for (monitor_t *m = wm.monitor_list; m; m = m->next) {
+    if (m->geometry.x <= point.x &&
+        point.x < m->geometry.x + m->geometry.width) {
+      return m;
+    }
+  }
+  return wm.monitor_list;
+}
+
 static void debug_show_monitor_list(void) {
   logger("\n========================== monitors ==========================\n");
   for (monitor_t *m = wm.monitor_list; m; m = m->next) {

src/wm.h

@@ -5,6 +5,7 @@
 #include <xcb/xcb_xrm.h>
 #include <xkbcommon/xkbcommon.h>
 
+#include "base.h"
 #include "types.h"
 
 typedef struct wm_t {
@@ -52,3 +53,4 @@ extern wm_t wm;
 void wm_restart(void);
 void wm_quit(void);
 void wm_restack_clients(void);
+monitor_t *wm_get_monitor_by_point(point_t point);

src/xcursor.c

@@ -2,7 +2,9 @@
 
 #include <stdint.h>
 #include <xcb/xcb_cursor.h>
+#include <xcb/xproto.h>
 
+#include "base.h"
 #include "utils.h"
 #include "wm.h"
 
@@ -126,3 +128,19 @@ void xcursor_clean(void) {
   }
   if (cursor_ctx) xcb_cursor_context_free(cursor_ctx);
 }
+
+point_t xcursor_query_pointer_position(void) {
+  xcb_query_pointer_cookie_t cookie =
+    xcb_query_pointer(wm.xcb_conn, wm.screen->root);
+  xcb_query_pointer_reply_t *reply =
+    xcb_query_pointer_reply(wm.xcb_conn, cookie, nullptr);
+  point_t pos = {.x = reply->root_x, .y = reply->root_y};
+  p_delete(&reply);
+  return pos;
+}
+
+void xcursor_set_pointer_position(point_t point) {
+  xcb_window_t window = XCB_WINDOW_NONE;
+  xcb_window_t root = wm.screen->root;
+  xcb_warp_pointer(wm.xcb_conn, window, root, 0, 0, 1, 1, point.x, point.y);
+}

src/xcursor.h

@@ -3,6 +3,8 @@
 #include <X11/cursorfont.h>
 #include <xcb/xproto.h>
 
+#include "base.h"
+
 typedef enum cursor_t {
   cursor_normal = XC_left_ptr,
   cursor_resize = XC_bottom_right_corner,
@@ -11,3 +13,5 @@ typedef enum cursor_t {
 
 xcb_cursor_t xcursor_get_xcb_cursor(cursor_t cursor);
 void xcursor_clean(void);
+point_t xcursor_query_pointer_position(void);
+void xcursor_set_pointer_position(point_t point);