Fix autoscroll position calculation in the MoveListView

When computing the autoscroll Y position the parts of characters
descending below the font baseline were visible for the line before
the first line that was supposed to be visible.

Also add a small margin above the move list to separate it somewhat
from the button row.

DroidFishApp/src/main/java/org/petero/droidfish/DroidFish.java

@@ -1995,7 +1995,7 @@ public class DroidFish extends Activity
         int currPos = gameTextListener.getCurrPos();
         int line = moveList.getLineForOffset(currPos);
         if (line >= 0 && autoScrollMoveList) {
-            int y = (line - 1) * moveList.getLineHeight();
+            int y = moveList.getLineStartY(line - 1);
             moveListScroll.scrollTo(0, y);
         }
     }

DroidFishApp/src/main/java/org/petero/droidfish/view/MoveListView.java

@@ -103,6 +103,18 @@ public class MoveListView extends View {
         return textPaint.getFontMetricsInt(null);
     }
 
+    /** Get the Y scroll value required to put line "lineNo" at the top of the view. */
+    public int getLineStartY(int lineNo) {
+        if (lineNo < 0)
+            return 0;
+        Paint.FontMetricsInt fmi = new Paint.FontMetricsInt();
+        int lineHeight = textPaint.getFontMetricsInt(fmi);
+        int y = lineHeight * lineNo;
+        if (lineNo > 0 && fmi.bottom > 0)
+            y += fmi.bottom - 1;
+        return y;
+    }
+
     @Override
     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
         super.onMeasure(widthMeasureSpec, heightMeasureSpec);

DroidFishApp/src/main/res/layout/main.xml

@@ -91,7 +91,8 @@
             <ScrollView
                 android:id="@+id/scrollView"
                 android:layout_width="fill_parent"
-                android:layout_height="fill_parent">
+                android:layout_height="fill_parent"
+                android:layout_marginTop="4dp">
 
                 <view
                     class="org.petero.droidfish.view.MoveListView"