检测显示器信息

src/xcb/xcb.c

@@ -0,0 +1,70 @@
+#include "xcb.h"
+
+#include <xcb/xcb.h>
+#include <xcb/xcb_aux.h>
+#include <xcb/xinerama.h>
+
+#include "utils.h"
+#include "xcb-private.h"
+
+xcb_connection_t *conn = NULL;
+
+bool has_other_wm_running(void) {
+  conn = xcb_connect(NULL, NULL);
+  if (!conn || xcb_connection_has_error(conn)) {
+    die("connection:");
+  }
+
+  const xcb_setup_t *setup = xcb_get_setup(conn);
+  xcb_screen_iterator_t iter = xcb_setup_roots_iterator(setup);
+  xcb_screen_t *screen = iter.data;
+  uint32_t mask = XCB_CW_EVENT_MASK;
+  xcb_params_cw_t params = {
+    .event_mask = XCB_EVENT_MASK_LEAVE_WINDOW | XCB_EVENT_MASK_ENTER_WINDOW |
+                  XCB_EVENT_MASK_POINTER_MOTION |
+                  XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
+                  XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY,
+  };
+  xcb_void_cookie_t cookie =
+    xcb_aux_change_window_attributes(conn, screen->root, mask, &params);
+  xcb_generic_error_t *error = xcb_request_check(conn, cookie);
+  if (error) {
+    xcb_disconnect(conn);
+    return true;
+  }
+
+  return false;
+}
+
+monitor_rect_t *detect_monitor_rect(void) {
+  monitor_rect_t *list, *prev;
+  xcb_xinerama_query_screens_cookie_t cookie = xcb_xinerama_query_screens(conn);
+  xcb_xinerama_query_screens_reply_t *reply =
+    xcb_xinerama_query_screens_reply(conn, cookie, NULL);
+  xcb_xinerama_screen_info_t *screen_info =
+    xcb_xinerama_query_screens_screen_info(reply);
+
+  if (screen_info == NULL) {
+    die("no monitor finded");
+  }
+
+  int count = xcb_xinerama_query_screens_screen_info_length(reply);
+  for (int i = 0; i < count; i++) {
+    monitor_rect_t *m = ecalloc(1, sizeof(monitor_rect_t));
+    xcb_xinerama_screen_info_t info = screen_info[i];
+    m->x = info.x_org;
+    m->y = info.y_org;
+    m->width = info.width;
+    m->height = info.height;
+    m->next = NULL;
+
+    if (i == 0) {
+      list = m;
+    } else {
+      prev->next = m;
+    }
+    prev = m;
+  }
+
+  return list;
+}