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

client/CMakeLists.txt

@@ -94,6 +94,7 @@ set(SOURCES
 	src/lg-renderer.c
 	src/ll.c
 	src/utils.c
+	src/wm.c
 )
 
 add_subdirectory("${PROJECT_TOP}/common"          "${CMAKE_BINARY_DIR}/common"   )

client/src/main.c

@@ -54,6 +54,7 @@ Place, Suite 330, Boston, MA 02111-1307 USA
 #include "utils.h"
 #include "kb.h"
 #include "ll.h"
+#include "wm.h"
 
 #define RESIZE_TIMEOUT (10 * 1000) // 10ms
 
@@ -964,17 +965,7 @@ static void handleMouseNormal(double ex, double ey)
         g_cursor.redraw = true;
 
         g_cursor.warpState = WARP_STATE_ON;
-
-        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);
+        wmGrabPointer();
       }
 
       struct DoublePoint guest =
@@ -1040,7 +1031,7 @@ static void handleMouseNormal(double ex, double ey)
         g_cursor.inWindow = false;
 
       /* ungrab the pointer and move the local cursor to the exit point */
-      XUngrabPointer(g_state.wminfo.info.x11.display, CurrentTime);
+      wmUngrabPointer();
       warpMouse(tx, ty, true);
       return;
     }
@@ -1140,14 +1131,7 @@ static void keyboardGrab()
     return;
 
   // grab the keyboard so we can intercept WM keys
-  XGrabKeyboard(
-    g_state.wminfo.info.x11.display,
-    g_state.wminfo.info.x11.window,
-    true,
-    GrabModeAsync,
-    GrabModeAsync,
-    CurrentTime
-  );
+  wmGrabKeyboard();
 }
 
 // only called for X11
@@ -1157,10 +1141,7 @@ static void keyboardUngrab()
     return;
 
   // ungrab the keyboard
-  XUngrabKeyboard(
-    g_state.wminfo.info.x11.display,
-    CurrentTime
-  );
+  wmUngrabKeyboard();
 }
 
 static void setGrab(bool enable)
@@ -1184,42 +1165,22 @@ static void setGrabQuiet(bool enable)
 
   g_cursor.grab = enable;
 
-  if (g_state.wminfo.subsystem != SDL_SYSWM_X11)
-    SDL_SetWindowGrab(g_state.window, enable);
+  if (enable)
+  {
+    wmGrabPointer();
+
+    if (params.grabKeyboard)
+      wmGrabKeyboard();
+  }
   else
   {
-    if (enable)
+    if (params.grabKeyboard)
     {
-      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);
-
-      if (params.grabKeyboard)
-        XGrabKeyboard(
-          g_state.wminfo.info.x11.display,
-          g_state.wminfo.info.x11.window,
-          true,
-          GrabModeAsync,
-          GrabModeAsync,
-          CurrentTime);
+      if (!g_state.focused || !params.grabKeyboardOnFocus)
+        wmUngrabKeyboard();
     }
-    else
-    {
-      if (params.grabKeyboard)
-      {
-        if (!g_state.focused || !params.grabKeyboardOnFocus)
-          XUngrabKeyboard(g_state.wminfo.info.x11.display, CurrentTime);
-      }
 
-      XUngrabPointer(g_state.wminfo.info.x11.display,  CurrentTime);
-    }
+    wmUngrabPointer();
   }
 
   // if exiting capture when input on capture only, we want to show the cursor

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();
+}

client/src/wm.h

@@ -0,0 +1,25 @@
+/*
+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
+*/
+
+void wmGrabPointer();
+void wmUngrabPointer();
+void wmGrabKeyboard();
+void wmUngrabKeyboard();
+void wmGrabAll();
+void wmUngrabAll();