feature/android 24f25fc2f88: Update Android port

[Po Lu]

branch: feature/android
commit 24f25fc2f8823b1999fa66e4b21601ee4000f321
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Update Android port
    
    * java/org/gnu/emacs/EmacsSurfaceView.java (EmacsSurfaceView):
    Document member variables.
    (onDraw): Use separate Paint object on the UI thread.
    * src/textconv.c (really_commit_text, really_set_composing_text)
    (really_delete_surrounding_text): Run modification hooks when
    deleting text.
---
 java/org/gnu/emacs/EmacsSurfaceView.java | 29 +++++++++++++++++++++++++----
 src/textconv.c                           | 12 ++++++------
 2 files changed, 31 insertions(+), 10 deletions(-)

diff --git a/java/org/gnu/emacs/EmacsSurfaceView.java 
b/java/org/gnu/emacs/EmacsSurfaceView.java
index 0deb930c2c2..738b1a99eef 100644
--- a/java/org/gnu/emacs/EmacsSurfaceView.java
+++ b/java/org/gnu/emacs/EmacsSurfaceView.java
@@ -38,19 +38,40 @@ import java.lang.ref.WeakReference;
 public final class EmacsSurfaceView extends View
 {
   private static final String TAG = "EmacsSurfaceView";
+
+  /* The EmacsView representing the window that this surface is
+     displaying.  */
   private EmacsView view;
+
+  /* The complete buffer contents at the time of the last draw.  */
   private Bitmap frontBuffer;
+
+  /* Canvas representing the front buffer.  */
   private Canvas bitmapCanvas;
+
+  /* Reference to the last bitmap copied to the front buffer.  */
   private WeakReference<Bitmap> bitmap;
-  private Paint bitmapPaint;
+
+  /* Paint objects used on the main and UI threads, respectively.  */
+  private static final Paint bitmapPaint, uiThreadPaint;
+
+  static
+  {
+    /* Create two different Paint objects; one is used on the main
+       thread for buffer swaps, while the other is used from the UI
+       thread in `onDraw'.  This is necessary because Paint objects
+       are not thread-safe, even if their uses are interlocked.  */
+
+    bitmapPaint = new Paint ();
+    uiThreadPaint = new Paint ();
+  };
 
   public
-  EmacsSurfaceView (final EmacsView view)
+  EmacsSurfaceView (EmacsView view)
   {
     super (view.getContext ());
 
     this.view = view;
-    this.bitmapPaint = new Paint ();
     this.bitmap = new WeakReference<Bitmap> (null);
   }
 
@@ -161,6 +182,6 @@ public final class EmacsSurfaceView extends View
        now.  */
 
     if (frontBuffer != null)
-      canvas.drawBitmap (frontBuffer, 0f, 0f, bitmapPaint);
+      canvas.drawBitmap (frontBuffer, 0f, 0f, uiThreadPaint);
   }
 };
diff --git a/src/textconv.c b/src/textconv.c
index d86877b5515..6718568ac98 100644
--- a/src/textconv.c
+++ b/src/textconv.c
@@ -617,7 +617,7 @@ really_commit_text (struct frame *f, EMACS_INT position,
 
       /* Now delete whatever needs to go.  */
 
-      del_range (start, end);
+      del_range_1 (start, end, true, false);
       record_buffer_change (start, start, Qt);
 
       /* Don't record changes if TEXT is empty.  */
@@ -821,7 +821,7 @@ really_set_composing_text (struct frame *f, ptrdiff_t 
position,
 
       if (end != start)
        {
-         del_range (start, end);
+         del_range_1 (start, end, true, false);
          set_point (start);
          record_buffer_change (start, start, Qt);
        }
@@ -841,7 +841,7 @@ really_set_composing_text (struct frame *f, ptrdiff_t 
position,
         its end.  */
       start = marker_position (f->conversion.compose_region_start);
       end = marker_position (f->conversion.compose_region_end);
-      del_range (start, end);
+      del_range_1 (start, end, true, false);
       set_point (start);
 
       if (start != end)
@@ -1041,7 +1041,7 @@ really_delete_surrounding_text (struct frame *f, 
ptrdiff_t left,
       start = max (BEGV, lstart - left);
       end = min (ZV, rstart + right);
 
-      text = del_range_1 (start, end, false, true);
+      text = del_range_1 (start, end, true, true);
       record_buffer_change (start, start, text);
     }
   else
@@ -1051,14 +1051,14 @@ really_delete_surrounding_text (struct frame *f, 
ptrdiff_t left,
 
       start = rstart;
       end = min (ZV, rstart + right);
-      text = del_range_1 (start, end, false, true);
+      text = del_range_1 (start, end, true, true);
       record_buffer_change (start, start, Qnil);
 
       /* Now delete what must be deleted on the left.  */
 
       start = max (BEGV, lstart - left);
       end = lstart;
-      text = del_range_1 (start, end, false, true);
+      text = del_range_1 (start, end, true, true);
       record_buffer_change (start, start, text);
     }