Go faster!!!!

The less we do, the faster we draw.

Change-Id: I7bbc3908b36d8ae295ea3e61ef71fd9ee2187970

Author: Romain Guy

api/current.txt

@@ -370,7 +370,7 @@ package android {
     field public static final int dialogTitle = 16843250; // 0x10101f2
     field public static final int digits = 16843110; // 0x1010166
     field public static final int direction = 16843217; // 0x10101d1
-    field public static final int directionDescriptions = 16843695; // 0x10103af
+    field public static final int directionDescriptions = 16843696; // 0x10103b0
     field public static final int directionPriority = 16843218; // 0x10101d2
     field public static final int disableDependentsState = 16843249; // 0x10101f1
     field public static final int disabledAlpha = 16842803; // 0x1010033
@@ -435,7 +435,7 @@ package android {
     field public static final int fadeEnabled = 16843390; // 0x101027e
     field public static final int fadeOffset = 16843383; // 0x1010277
     field public static final int fadeScrollbars = 16843434; // 0x10102aa
-    field public static final int fadingEdge = 16842975; // 0x10100df
+    field public static final deprecated int fadingEdge = 16842975; // 0x10100df
     field public static final int fadingEdgeLength = 16842976; // 0x10100e0
     field public static final int fastScrollAlwaysVisible = 16843573; // 0x1010335
     field public static final int fastScrollEnabled = 16843302; // 0x1010226
@@ -711,7 +711,7 @@ package android {
     field public static final int overScrollFooter = 16843459; // 0x10102c3
     field public static final int overScrollHeader = 16843458; // 0x10102c2
     field public static final int overScrollMode = 16843457; // 0x10102c1
-    field public static final int overridesImplicitlyEnabledSubtype = 16843696; // 0x10103b0
+    field public static final int overridesImplicitlyEnabledSubtype = 16843697; // 0x10103b1
     field public static final int packageNames = 16843649; // 0x1010381
     field public static final int padding = 16842965; // 0x10100d5
     field public static final int paddingBottom = 16842969; // 0x10100d9
@@ -790,6 +790,7 @@ package android {
     field public static final int reqNavigation = 16843306; // 0x101022a
     field public static final int reqTouchScreen = 16843303; // 0x1010227
     field public static final int required = 16843406; // 0x101028e
+    field public static final int requiresFadingEdge = 16843694; // 0x10103ae
     field public static final int requiresSmallestWidthDp = 16843620; // 0x1010364
     field public static final int resizeMode = 16843619; // 0x1010363
     field public static final int resizeable = 16843405; // 0x101028d
@@ -942,7 +943,7 @@ package android {
     field public static final int tag = 16842961; // 0x10100d1
     field public static final int targetActivity = 16843266; // 0x1010202
     field public static final int targetClass = 16842799; // 0x101002f
-    field public static final int targetDescriptions = 16843694; // 0x10103ae
+    field public static final int targetDescriptions = 16843695; // 0x10103af
     field public static final int targetDrawables = 16843654; // 0x1010386
     field public static final int targetPackage = 16842785; // 0x1010021
     field public static final int targetSdkVersion = 16843376; // 0x1010270

core/java/android/view/View.java

@@ -69,6 +69,8 @@
 import android.view.inputmethod.InputMethodManager;
 import android.widget.ScrollBarDrawable;
 
+import static android.os.Build.VERSION_CODES.*;
+
 import com.android.internal.R;
 import com.android.internal.util.Predicate;
 import com.android.internal.view.menu.MenuBuilder;
@@ -585,7 +587,7 @@
  * @attr ref android.R.styleable#View_drawingCacheQuality
  * @attr ref android.R.styleable#View_duplicateParentState
  * @attr ref android.R.styleable#View_id
- * @attr ref android.R.styleable#View_fadingEdge
+ * @attr ref android.R.styleable#View_requiresFadingEdge
  * @attr ref android.R.styleable#View_fadingEdgeLength
  * @attr ref android.R.styleable#View_filterTouchesWhenObscured
  * @attr ref android.R.styleable#View_fitsSystemWindows
@@ -2895,6 +2897,12 @@ public View(Context context, AttributeSet attrs, int defStyle) {
                     }
                     break;
                 case R.styleable.View_fadingEdge:
+                    if (context.getApplicationInfo().targetSdkVersion >= ICE_CREAM_SANDWICH) {
+                        // Ignore the attribute starting with ICS
+                        break;
+                    }
+                    // With builds < ICS, fall through and apply fading edges
+                case R.styleable.View_requiresFadingEdge:
                     final int fadingEdge = a.getInt(attr, FADING_EDGE_NONE);
                     if (fadingEdge != FADING_EDGE_NONE) {
                         viewFlagValues |= fadingEdge;
@@ -8642,7 +8650,7 @@ public void computeScroll() {
      *         otherwise
      *
      * @see #setHorizontalFadingEdgeEnabled(boolean)
-     * @attr ref android.R.styleable#View_fadingEdge
+     * @attr ref android.R.styleable#View_requiresFadingEdge
      */
     public boolean isHorizontalFadingEdgeEnabled() {
         return (mViewFlags & FADING_EDGE_HORIZONTAL) == FADING_EDGE_HORIZONTAL;
@@ -8657,7 +8665,7 @@ public boolean isHorizontalFadingEdgeEnabled() {
      *                                    horizontally
      *
      * @see #isHorizontalFadingEdgeEnabled()
-     * @attr ref android.R.styleable#View_fadingEdge
+     * @attr ref android.R.styleable#View_requiresFadingEdge
      */
     public void setHorizontalFadingEdgeEnabled(boolean horizontalFadingEdgeEnabled) {
         if (isHorizontalFadingEdgeEnabled() != horizontalFadingEdgeEnabled) {
@@ -8677,7 +8685,7 @@ public void setHorizontalFadingEdgeEnabled(boolean horizontalFadingEdgeEnabled)
      *         otherwise
      *
      * @see #setVerticalFadingEdgeEnabled(boolean)
-     * @attr ref android.R.styleable#View_fadingEdge
+     * @attr ref android.R.styleable#View_requiresFadingEdge
      */
     public boolean isVerticalFadingEdgeEnabled() {
         return (mViewFlags & FADING_EDGE_VERTICAL) == FADING_EDGE_VERTICAL;
@@ -8692,7 +8700,7 @@ public boolean isVerticalFadingEdgeEnabled() {
      *                                  vertically
      *
      * @see #isVerticalFadingEdgeEnabled()
-     * @attr ref android.R.styleable#View_fadingEdge
+     * @attr ref android.R.styleable#View_requiresFadingEdge
      */
     public void setVerticalFadingEdgeEnabled(boolean verticalFadingEdgeEnabled) {
         if (isVerticalFadingEdgeEnabled() != verticalFadingEdgeEnabled) {

core/res/res/values/attrs.xml

@@ -1804,7 +1804,13 @@
         <!-- Defines whether the vertical scrollbar track should always be drawn. -->
         <attr name="scrollbarAlwaysDrawVerticalTrack" format="boolean" />
 
-        <!-- Defines which edges should be fadeded on scrolling. -->
+        <!-- {@deprecated This attribute is deprecated and will be ignored as of
+             API level {@link android.os.Build.VERSION_CODES#ICE_CREAM_SANDWICH}.
+             Using fading edges may introduce noticeable performance
+             degradations and should be used only when required by the application's
+             visual design. To request fading edges with API level
+             {@link android.os.Build.VERSION_CODES#ICE_CREAM_SANDWICH} and above,
+             use the <code>requiresFadingEdge</code> attribute instead.} -->
         <attr name="fadingEdge">
             <!-- No edge is faded. -->
             <flag name="none" value="0x00000000" />
@@ -1813,6 +1819,15 @@
             <!-- Fades vertical edges only. -->
             <flag name="vertical" value="0x00002000" />
         </attr>
+        <!-- Defines which edges should be faded on scrolling. -->
+        <attr name="requiresFadingEdge">
+            <!-- No edge is faded. -->
+            <flag name="none" value="0x00000000" />
+            <!-- Fades horizontal edges only. -->
+            <flag name="horizontal" value="0x00001000" />
+            <!-- Fades vertical edges only. -->
+            <flag name="vertical" value="0x00002000" />
+        </attr>
         <!-- Defines the length of the fading edges. -->
         <attr name="fadingEdgeLength" format="dimension" />
 

core/res/res/values/public.xml

@@ -1806,6 +1806,8 @@
   <public type="attr" name="listPreferredItemPaddingLeft" />
   <public type="attr" name="listPreferredItemPaddingRight" />
 
+  <public type="attr" name="requiresFadingEdge" />
+
   <public type="style" name="TextAppearance.SuggestionHighlight" />
 
   <public type="style" name="Theme.Holo.Light.DarkActionBar" />