Add an api to set WebView over scroll background.

If the WebView doesn't support zoom, or WebView does
not use wide viewport and horizontal is just fit,
don't do over scroll.

Fix http://b/issue?id=2498403
Fix http://b/issue?id=2497901

1 files changed, 18 insertions, 0 deletions

diff --git a/core/java/android/webkit/WebSettings.java b/core/java/android/webkit/WebSettings.java
index 89814196f710..fb15f788d781 100644
--- a/core/java/android/webkit/WebSettings.java
+++ b/core/java/android/webkit/WebSettings.java
@@ -192,6 +192,7 @@ public class WebSettings {
     private boolean         mBuiltInZoomControls = false;
     private boolean         mAllowFileAccess = true;
     private boolean         mLoadWithOverviewMode = false;
+    private boolean         mUseSystemOverscrollBackground = false;
 
     // private WebSettings, not accessible by the host activity
     static private int      mDoubleTapToastCount = 3;
@@ -470,6 +471,23 @@ public class WebSettings {
     }
 
     /**
+     * Set whether the WebView uses system background for over scroll
+     * background. If false, it will use the WebView's background. Default is
+     * false.
+     */
+    public void setUseSystemOverscrollBackground(boolean system) {
+        mUseSystemOverscrollBackground = system;
+    }
+
+    /**
+     * Returns true if this WebView uses system background instead of WebView
+     * background for over scroll background.
+     */
+    public boolean getUseSystemOverscrollBackground() {
+        return mUseSystemOverscrollBackground;
+    }
+
+    /**
      * Store whether the WebView is saving form data.
      */
     public void setSaveFormData(boolean save) {