Allows users to scroll while in select mode.

This change allows the user to select-n-scroll. While a user
is in select mode, and they try to scroll, the textbox will
scroll in the direction of the selection, and expand the selection.

2 files changed, 23 insertions, 5 deletions

diff --git a/core/java/android/text/method/ArrowKeyMovementMethod.java b/core/java/android/text/method/ArrowKeyMovementMethod.java
index 789172f..e27804c 100644
--- a/core/java/android/text/method/ArrowKeyMovementMethod.java
+++ b/core/java/android/text/method/ArrowKeyMovementMethod.java
@@ -254,6 +254,12 @@ implements MovementMethod
 
                   buffer.setSpan(LAST_TAP_DOWN, offset, offset,
                                  Spannable.SPAN_POINT_POINT);
+
+                  // Disallow intercepting of the touch events, so that
+                  // users can scroll and select at the same time.
+                  // without this, users would get booted out of select
+                  // mode once the view detected it needed to scroll.
+                  widget.getParent().requestDisallowInterceptTouchEvent(true);
               }
             } else if (event.getAction() == MotionEvent.ACTION_MOVE ) {
               boolean cap = (MetaKeyKeyListener.getMetaState(buffer,
@@ -277,7 +283,7 @@ implements MovementMethod
                 int spanstart;
                 int spanend;
                 if (offset >= lastDownOffset) {
-                  // expand to from word start of the original tap to new word
+                  // Expand from word start of the original tap to new word
                   // end, since we are selecting "forwards"
                   spanstart = findWordStart(buffer, lastDownOffset);
                   spanend = findWordEnd(buffer, offset);
diff --git a/core/java/android/text/method/Touch.java b/core/java/android/text/method/Touch.java
index aa8d979..42ad10e 100644
--- a/core/java/android/text/method/Touch.java
+++ b/core/java/android/text/method/Touch.java
@@ -24,6 +24,7 @@ import android.util.Log;
 import android.view.MotionEvent;
 import android.view.ViewConfiguration;
 import android.widget.TextView;
+import android.view.KeyEvent;
 
 public class Touch {
     private Touch() { }
@@ -139,10 +140,21 @@ public class Touch {
 
                 if (ds[0].mFarEnough) {
                     ds[0].mUsed = true;
-
-                    float dx = ds[0].mX - event.getX();
-                    float dy = ds[0].mY - event.getY();
-
+                    boolean cap = (MetaKeyKeyListener.getMetaState(buffer,
+                                   KeyEvent.META_SHIFT_ON) == 1) ||
+                                   (MetaKeyKeyListener.getMetaState(buffer,
+                                    MetaKeyKeyListener.META_SELECTING) != 0);
+                    float dx;
+                    float dy;
+                    if (cap) {
+                        // if we're selecting, we want the scroll to go in
+                        // the direction of the drag
+                        dx = event.getX() - ds[0].mX;
+                        dy = event.getY() - ds[0].mY;
+                    } else {
+                        dx = ds[0].mX - event.getX();
+                        dy = ds[0].mY - event.getY();
+                    }
                     ds[0].mX = event.getX();
                     ds[0].mY = event.getY();