Add setting for configuring zoom level on double-tap.

In overview mode, text wrap is done at reading level scale. If user
changes double-tap zoom in overview mode, reflow text at the new scale.
In any other mode, a double-tap will take user to overview mode, at
which point, the text will be reflowed at the updated reading level
scale.

Bug: 5312461
Change-Id: I29be34a32246019101a9a875e1758e22b5af2bd3

1 files changed, 22 insertions, 0 deletions

diff --git a/core/java/android/webkit/WebSettings.java b/core/java/android/webkit/WebSettings.java
index 9c44138..f1c2bde 100644
--- a/core/java/android/webkit/WebSettings.java
+++ b/core/java/android/webkit/WebSettings.java
@@ -211,6 +211,7 @@ public class WebSettings {
     private ZoomDensity     mDefaultZoom = ZoomDensity.MEDIUM;
     private RenderPriority  mRenderPriority = RenderPriority.NORMAL;
     private int             mOverrideCacheMode = LOAD_DEFAULT;
+    private int             mDoubleTapZoom = 100;
     private boolean         mSaveFormData = true;
     private boolean         mAutoFillEnabled = false;
     private boolean         mSavePassword = true;
@@ -769,6 +770,27 @@ public class WebSettings {
     }
 
     /**
+     * Set the double-tap zoom of the page in percent. Default is 100.
+     * @param doubleTapZoom A percent value for increasing or decreasing the double-tap zoom.
+     * @hide
+     */
+    public void setDoubleTapZoom(int doubleTapZoom) {
+        if (mDoubleTapZoom != doubleTapZoom) {
+            mDoubleTapZoom = doubleTapZoom;
+            mWebView.updateDoubleTapZoom();
+        }
+    }
+
+    /**
+     * Get the double-tap zoom of the page in percent.
+     * @return A percent value describing the double-tap zoom.
+     * @hide
+     */
+    public int getDoubleTapZoom() {
+        return mDoubleTapZoom;
+    }
+
+    /**
      * Set the default zoom density of the page. This should be called from UI
      * thread.
      * @param zoom A ZoomDensity value