Enable smooth scrolling again.

Clover/src/org/floens/chan/ui/ScrollerRunnable.java

@@ -22,6 +22,8 @@ import android.view.ViewConfiguration;
 import android.widget.ListView;
 
 public class ScrollerRunnable implements Runnable {
+    private static final int SCROLL_DURATION = 300;
+
     private static final int MOVE_DOWN_POS = 1;
     private static final int MOVE_UP_POS = 2;
 
@@ -30,6 +32,7 @@ public class ScrollerRunnable implements Runnable {
     private int mMode;
     private int mTargetPos;
     private int mLastSeenPos;
+    private int mScrollDuration;
     private final int mExtraScroll;
 
     public ScrollerRunnable(ListView listView) {
@@ -43,18 +46,23 @@ public class ScrollerRunnable implements Runnable {
         final int firstPos = mList.getFirstVisiblePosition();
         final int lastPos = firstPos + mList.getChildCount() - 1;
 
-        //        int viewTravelCount = 0;
+        int viewTravelCount = 0;
         if (position <= firstPos) {
-            //            viewTravelCount = firstPos - position + 1;
+            viewTravelCount = firstPos - position + 1;
             mMode = MOVE_UP_POS;
         } else if (position >= lastPos) {
-            //            viewTravelCount = position - lastPos + 1;
+            viewTravelCount = position - lastPos + 1;
             mMode = MOVE_DOWN_POS;
         } else {
             // Already on screen, nothing to do
             return;
         }
 
+        if (viewTravelCount > 0) {
+            mScrollDuration = SCROLL_DURATION / viewTravelCount;
+        } else {
+            mScrollDuration = SCROLL_DURATION;
+        }
         mTargetPos = position;
         mLastSeenPos = ListView.INVALID_POSITION;
 
@@ -81,8 +89,8 @@ public class ScrollerRunnable implements Runnable {
 
             if (lastPos == mLastSeenPos) {
                 // No new views, let things keep going.
-                //                mList.post(this);
-                //                return;
+                mList.post(this);
+                return;
             }
 
             final View lastView = mList.getChildAt(lastViewIndex);
@@ -91,7 +99,7 @@ public class ScrollerRunnable implements Runnable {
             final int lastViewPixelsShowing = listHeight - lastViewTop;
             final int extraScroll = lastPos < mList.getCount() - 1 ? mExtraScroll : mList.getPaddingBottom();
 
-            mList.smoothScrollBy(lastViewHeight - lastViewPixelsShowing + extraScroll, 0);
+            mList.smoothScrollBy(lastViewHeight - lastViewPixelsShowing + extraScroll, mScrollDuration);
 
             mLastSeenPos = lastPos;
             if (lastPos < mTargetPos) {
@@ -103,8 +111,8 @@ public class ScrollerRunnable implements Runnable {
         case MOVE_UP_POS: {
             if (firstPos == mLastSeenPos) {
                 // No new views, let things keep going.
-                //                mList.post(this);
-                //                return;
+                mList.post(this);
+                return;
             }
 
             final View firstView = mList.getChildAt(0);
@@ -114,7 +122,7 @@ public class ScrollerRunnable implements Runnable {
             final int firstViewTop = firstView.getTop();
             final int extraScroll = firstPos > 0 ? mExtraScroll : mList.getPaddingTop();
 
-            mList.smoothScrollBy(firstViewTop - extraScroll, 0);
+            mList.smoothScrollBy(firstViewTop - extraScroll, mScrollDuration);
 
             mLastSeenPos = firstPos;