[client] spice: create and use platform agnostic grab/ungrab methods

2025-11-30 13:18:22 +00:00 · 2021-01-10 15:26:33 +11:00
parent 8982493239
commit 76ed75f871
4 changed files with 179 additions and 55 deletions
--- a/client/src/wm.c
+++ b/client/src/wm.c
@@ -0,0 +1,137 @@
+/*
+Looking Glass - KVM FrameRelay (KVMFR) Client
+Copyright (C) 2017-2021 Geoffrey McRae <geoff@hostfission.com>
+https://looking-glass.hostfission.com
+
+This program is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free Software
+Foundation; either version 2 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+#include "wm.h"
+#include "main.h"
+
+#include <stdbool.h>
+#include <SDL2/SDL.h>
+
+#include "common/debug.h"
+
+struct WMState
+{
+  bool pointerGrabbed;
+  bool keyboardGrabbed;
+};
+
+static struct WMState g_wmState;
+
+void wmGrabPointer()
+{
+  switch(g_state.wminfo.subsystem)
+  {
+    case SDL_SYSWM_X11:
+      XGrabPointer(
+        g_state.wminfo.info.x11.display,
+        g_state.wminfo.info.x11.window,
+        true,
+        None,
+        GrabModeAsync,
+        GrabModeAsync,
+        g_state.wminfo.info.x11.window,
+        None,
+        CurrentTime);
+      break;
+
+    default:
+      SDL_SetWindowGrab(g_state.window, SDL_TRUE);
+      break;
+  }
+
+  g_wmState.pointerGrabbed = true;
+}
+
+void wmUngrabPointer()
+{
+  switch(g_state.wminfo.subsystem)
+  {
+    case SDL_SYSWM_X11:
+      XUngrabPointer(g_state.wminfo.info.x11.display, CurrentTime);
+      break;
+
+    default:
+      SDL_SetWindowGrab(g_state.window, SDL_TRUE);
+      break;
+  }
+
+  g_wmState.pointerGrabbed = false;
+}
+
+void wmGrabKeyboard()
+{
+  switch(g_state.wminfo.subsystem)
+  {
+    case SDL_SYSWM_X11:
+      XGrabKeyboard(
+        g_state.wminfo.info.x11.display,
+        g_state.wminfo.info.x11.window,
+        true,
+        GrabModeAsync,
+        GrabModeAsync,
+        CurrentTime);
+      break;
+
+    default:
+      if (g_wmState.pointerGrabbed)
+        SDL_SetWindowGrab(g_state.window, SDL_FALSE);
+      else
+      {
+        DEBUG_WARN("SDL does not support grabbing only the keyboard, grabbing all");
+        g_wmState.pointerGrabbed = true;
+      }
+
+      SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
+      SDL_SetWindowGrab(g_state.window, SDL_TRUE);
+      break;
+  }
+
+  g_wmState.keyboardGrabbed = true;
+}
+
+void wmUngrabKeyboard()
+{
+  switch(g_state.wminfo.subsystem)
+  {
+    case SDL_SYSWM_X11:
+      XUngrabKeyboard(g_state.wminfo.info.x11.display, CurrentTime);
+      break;
+
+    default:
+      SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "0");
+      SDL_SetWindowGrab(g_state.window, SDL_FALSE);
+      if (g_wmState.pointerGrabbed)
+        SDL_SetWindowGrab(g_state.window, SDL_TRUE);
+      break;
+  }
+
+  g_wmState.keyboardGrabbed = false;
+}
+
+void wmGrabAll()
+{
+  wmGrabPointer();
+  wmGrabKeyboard();
+}
+
+void wmUngrabAll()
+{
+  wmUngrabPointer();
+  wmUngrabKeyboard();
+}