From 26454141a8c489d84b7d486ad03869ff0f44dfdc Mon Sep 17 00:00:00 2001
From: Keisuke Kuroyanagi <ksk@google.com>
Date: Wed, 2 Dec 2015 15:04:57 -0800
Subject: [PATCH] Fix selection expansion detection logic.

The logic to detect vertical expansion is inverted on RTL
text. As a result, the selection handle cannot be moved
when it's dragged toward vertically expanding and
horizontally shrinking direction.

Bug: 25893288
Change-Id: I096595d287261b1287862c6ad27ae7f6f0a73262
---
 core/java/android/widget/Editor.java          | 11 ++++--
 .../res/layout/activity_text_view.xml         |  4 +--
 .../android/widget/TextViewActivityTest.java  | 34 +++++++++++++++++++
 3 files changed, 44 insertions(+), 5 deletions(-)

diff --git a/core/java/android/widget/Editor.java b/core/java/android/widget/Editor.java
index 5146bc67c0605..6becd1e88112c 100644
--- a/core/java/android/widget/Editor.java
+++ b/core/java/android/widget/Editor.java
@@ -4223,10 +4223,15 @@ public class Editor {
 
             boolean isExpanding;
             final float xDiff = x - mPrevX;
-            if (atRtl == isStartHandle()) {
-                isExpanding = xDiff > 0 || currLine > mPreviousLineTouched;
+            if (isStartHandle()) {
+                isExpanding = currLine < mPreviousLineTouched;
             } else {
-                isExpanding = xDiff < 0 || currLine < mPreviousLineTouched;
+                isExpanding = currLine > mPreviousLineTouched;
+            }
+            if (atRtl == isStartHandle()) {
+                isExpanding |= xDiff > 0;
+            } else {
+                isExpanding |= xDiff < 0;
             }
 
             if (mTextView.getHorizontallyScrolling()) {
diff --git a/core/tests/coretests/res/layout/activity_text_view.xml b/core/tests/coretests/res/layout/activity_text_view.xml
index 7ab0b130c2939..e795c10003ee8 100644
--- a/core/tests/coretests/res/layout/activity_text_view.xml
+++ b/core/tests/coretests/res/layout/activity_text_view.xml
@@ -23,6 +23,6 @@
     <EditText
             android:id="@+id/textview"
             android:layout_width="match_parent"
-            android:layout_height="match_parent" />
+            android:layout_height="wrap_content" />
 
-</LinearLayout>
\ No newline at end of file
+</LinearLayout>
diff --git a/core/tests/coretests/src/android/widget/TextViewActivityTest.java b/core/tests/coretests/src/android/widget/TextViewActivityTest.java
index 461450595b772..a6250e67a7f9e 100644
--- a/core/tests/coretests/src/android/widget/TextViewActivityTest.java
+++ b/core/tests/coretests/src/android/widget/TextViewActivityTest.java
@@ -29,6 +29,7 @@ import static android.widget.espresso.FloatingToolbarEspressoUtils.assertFloatin
 import static android.support.test.espresso.Espresso.onView;
 import static android.support.test.espresso.action.ViewActions.click;
 import static android.support.test.espresso.action.ViewActions.pressKey;
+import static android.support.test.espresso.action.ViewActions.replaceText;
 import static android.support.test.espresso.action.ViewActions.typeTextIntoFocusedView;
 import static android.support.test.espresso.assertion.ViewAssertions.matches;
 import static android.support.test.espresso.matcher.RootMatchers.withDecorView;
@@ -218,6 +219,39 @@ public class TextViewActivityTest extends ActivityInstrumentationTestCase2<TextV
         onView(withId(R.id.textview)).check(hasSelection("abcd\nefg\nhijk\nlmn\nopqr"));
     }
 
+    @SmallTest
+    public void testSelectionHandles_multiLine_rtl() throws Exception {
+        // Arabic text.
+        final String text = "\u062A\u062B\u062C\n" + "\u062D\u062E\u062F\n"
+                + "\u0630\u0631\u0632\n" + "\u0633\u0634\u0635\n" + "\u0636\u0637\u0638\n"
+                + "\u0639\u063A\u063B";
+        onView(withId(R.id.textview)).perform(click());
+        onView(withId(R.id.textview)).perform(replaceText(text));
+        onView(withId(R.id.textview)).perform(clickOnTextAtIndex(text.length()));
+        onView(withId(R.id.textview)).perform(doubleClickOnTextAtIndex(text.indexOf('\u0634')));
+
+        final TextView textView = (TextView)getActivity().findViewById(R.id.textview);
+        onHandleView(com.android.internal.R.id.selection_start_handle)
+                .perform(dragHandle(textView, Handle.SELECTION_START, text.indexOf('\u062E')));
+        onView(withId(R.id.textview)).check(hasSelection(
+                text.substring(text.indexOf('\u062D'), text.indexOf('\u0635') + 1)));
+
+        onHandleView(com.android.internal.R.id.selection_start_handle)
+                .perform(dragHandle(textView, Handle.SELECTION_START, text.indexOf('\u062A')));
+        onView(withId(R.id.textview)).check(hasSelection(
+                text.substring(text.indexOf('\u062A'), text.indexOf('\u0635') + 1)));
+
+        onHandleView(com.android.internal.R.id.selection_end_handle)
+                .perform(dragHandle(textView, Handle.SELECTION_END, text.indexOf('\u0638')));
+        onView(withId(R.id.textview)).check(hasSelection(
+                text.substring(text.indexOf('\u062A'), text.indexOf('\u0638') + 1)));
+
+        onHandleView(com.android.internal.R.id.selection_end_handle)
+                .perform(dragHandle(textView, Handle.SELECTION_END, text.indexOf('\u063B')));
+        onView(withId(R.id.textview)).check(hasSelection(text));
+    }
+
+
     @SmallTest
     public void testSelectionHandles_doesNotPassAnotherHandle() throws Exception {
         final String text = "abcd efg hijk lmn";