1 files changed, 83 insertions, 0 deletions
diff --git a/java/org/gnu/emacs/EmacsSurfaceView.java b/java/org/gnu/emacs/EmacsSurfaceView.java
new file mode 100644
index 00000000000..194f6ad37a3
--- /dev/null
+++ b/java/org/gnu/emacs/EmacsSurfaceView.java
@@ -0,0 +1,83 @@
+/* Communication module for Android terminals.  -*- c-file-style: "GNU" -*-
+
+Copyright (C) 2023 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs 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 3 of the License, or (at
+your option) any later version.
+
+GNU Emacs 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 GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
+
+package org.gnu.emacs;
+
+import android.view.SurfaceView;
+import android.view.SurfaceHolder;
+
+import android.graphics.Canvas;
+import android.graphics.Rect;
+
+public class EmacsSurfaceView extends SurfaceView
+{
+  private boolean created;
+
+  public
+  EmacsSurfaceView (final EmacsView view)
+  {
+    super (view.getContext ());
+
+    getHolder ().addCallback (new SurfaceHolder.Callback () {
+	@Override
+	public void
+	surfaceChanged (SurfaceHolder holder, int format,
+			int width, int height)
+	{
+
+	}
+
+	@Override
+	public void
+	surfaceCreated (SurfaceHolder holder)
+	{
+	  created = true;
+
+	  /* Force a buffer swap now to get the contents of the Emacs
+	     view on screen.  */
+	  view.swapBuffers ();
+	}
+
+	@Override
+	public void
+	surfaceDestroyed (SurfaceHolder holder)
+	{
+	  created = false;
+	}
+      });
+  }
+
+  public boolean
+  isCreated ()
+  {
+    return created;
+  }
+
+  public Canvas
+  lockCanvas (Rect damage)
+  {
+    return getHolder ().lockCanvas (damage);
+  }
+
+  public void
+  unlockCanvasAndPost (Canvas canvas)
+  {
+    getHolder ().unlockCanvasAndPost (canvas);
+  }
+};