Android URL formatting: Disable RTL URLs for Android 4.2 and below.

chrome/android/java/src/org/chromium/chrome/browser/omnibox/UrlBar.java

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.omnibox;
 
 import android.content.ClipData;
 import android.content.ClipboardManager;
 import android.content.Context;
 import android.content.res.Resources;
 import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.graphics.Rect;
 import android.net.Uri;
+import android.os.Build;
 import android.os.StrictMode;
 import android.os.SystemClock;
 import android.text.Editable;
 import android.text.Layout;
 import android.text.Selection;
 import android.text.Spanned;
 import android.text.TextUtils;
 import android.text.style.ReplacementSpan;
 import android.util.AttributeSet;
 import android.util.Pair;
@@ skipping 33 matching lines @@
 public class UrlBar extends VerticallyFixedEditText {
     private static final String TAG = "cr_UrlBar";
 
     private static final boolean DEBUG = false;
 
     // TextView becomes very slow on long strings, so we limit maximum length
     // of what is displayed to the user, see limitDisplayableLength().
     private static final int MAX_DISPLAYABLE_LENGTH = 4000;
     private static final int MAX_DISPLAYABLE_LENGTH_LOW_END = 1000;
 
+    // Unicode "Left-To-Right Mark" (LRM) character.
+    private static final char LRM = '\u200E';
+
     /** The contents of the URL that precede the path/query after being formatted. */
     private String mFormattedUrlLocation;
 
     /** The contents of the URL that precede the path/query before formatting. */
     private String mOriginalUrlLocation;
 
     private boolean mFirstDrawComplete;
 
     /**
      * The text direction of the URL or query: LAYOUT_DIRECTION_LOCALE, LAYOUT_DIRECTION_LTR, or
@@ skipping 673 matching lines @@
 
     /**
      * Sets the text content of the URL bar.
      *
      * @param url The original URL (or generic text) that can be used for copy/cut/paste.
      * @param formattedUrl Formatted URL for user display. Null if there isn't one.
      * @return Whether the visible text has changed.
      */
     public boolean setUrl(String url, String formattedUrl) {
         if (!TextUtils.isEmpty(formattedUrl)) {
+            // Because Android versions 4.2 and before lack proper RTL support,
+            // force the formatted URL to render as LTR using an LRM character.
+            // See: https://www.ietf.org/rfc/rfc3987.txt and crbug.com/709417
+            if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.JELLY_BEAN_MR1) {
+                formattedUrl = LRM + formattedUrl;
+            }
+
             try {
                 URL javaUrl = new URL(url);
                 mFormattedUrlLocation =
                         getUrlContentsPrePath(formattedUrl, javaUrl.getHost());
                 mOriginalUrlLocation =
                         getUrlContentsPrePath(url, javaUrl.getHost());
             } catch (MalformedURLException mue) {
                 mOriginalUrlLocation = null;
                 mFormattedUrlLocation = null;
             }
@@ skipping 463 matching lines @@
             return (int) paint.measureText(ELLIPSIS);
         }
 
         @Override
         public void draw(Canvas canvas, CharSequence text, int start, int end,
                 float x, int top, int y, int bottom, Paint paint) {
             canvas.drawText(ELLIPSIS, x, y, paint);
         }
     }
 }