Better handle double tap for smooth reflow and zoom.

In case it's the first time to reflow or the page is in zoom overview
mode, let the reflow and zoom happen at the same time to avoid the
need of double tapping twice.

Also fix the viewport width to webview's original width for mobile
site.

issue: 4482888
Change-Id: Ic7c73a9eb3f75fd68322f7f4da14141126e75ad8

1 files changed, 10 insertions, 1 deletions

diff --git a/core/java/android/webkit/ZoomManager.java b/core/java/android/webkit/ZoomManager.java
index 780339143620..fe6fb2f33f39 100644
--- a/core/java/android/webkit/ZoomManager.java
+++ b/core/java/android/webkit/ZoomManager.java
@@ -634,8 +634,17 @@ class ZoomManager {
         } else {
             newTextWrapScale = mActualScale;
         }
+        final boolean firstTimeReflow = !exceedsMinScaleIncrement(mActualScale, mTextWrapScale);
+        if (firstTimeReflow || mInZoomOverview) {
+            // In case first time reflow or in zoom overview mode, let reflow and zoom
+            // happen at the same time.
+            mTextWrapScale = newTextWrapScale;
+        }
         if (settings.isNarrowColumnLayout()
-                && exceedsMinScaleIncrement(mTextWrapScale, newTextWrapScale)) {
+                && exceedsMinScaleIncrement(mTextWrapScale, newTextWrapScale)
+                && !firstTimeReflow
+                && !mInZoomOverview) {
+            // Reflow only.
             mTextWrapScale = newTextWrapScale;
             refreshZoomScale(true);
         } else if (!mInZoomOverview && willScaleTriggerZoom(getZoomOverviewScale())) {