[Android] Support double-tap selection

ui/touch_selection/touch_selection_controller_unittest.cc

Index: ui/touch_selection/touch_selection_controller_unittest.cc
diff --git a/ui/touch_selection/touch_selection_controller_unittest.cc b/ui/touch_selection/touch_selection_controller_unittest.cc
index be971b1034bd9a002e2bc60d044de4f67857a465..f6e7305f067a0fec6d960115d5e7723975bd3159 100644
--- a/ui/touch_selection/touch_selection_controller_unittest.cc
+++ b/ui/touch_selection/touch_selection_controller_unittest.cc
@@ -151,7 +151,11 @@ class TouchSelectionControllerTest : public testing::Test,
   }
 
   void OnTapEvent() {
-    ASSERT_FALSE(controller().WillHandleTapEvent(kIgnoredPoint));
+    ASSERT_FALSE(controller().WillHandleTapEvent(kIgnoredPoint, 1));
+  }
+
+  void OnDoubleTapEvent() {
+    ASSERT_FALSE(controller().WillHandleTapEvent(kIgnoredPoint, 2));
   }
 
   void Animate() {
@@ -605,6 +609,38 @@ TEST_F(TouchSelectionControllerTest, SelectionBasic) {
   EXPECT_EQ(gfx::PointF(), GetLastEventStart());
 }
 
+TEST_F(TouchSelectionControllerTest, SelectionAllowedByDoubleTap) {
+  gfx::RectF start_rect(5, 5, 0, 10);
+  gfx::RectF end_rect(50, 5, 0, 10);
+  bool visible = true;
+
+  OnDoubleTapEvent();
+  ChangeSelection(start_rect, visible, end_rect, visible);
+  EXPECT_THAT(GetAndResetEvents(),
+              ElementsAre(SELECTION_ESTABLISHED, SELECTION_HANDLES_SHOWN));
+  EXPECT_EQ(start_rect.bottom_left(), GetLastEventStart());
+}
+
+TEST_F(TouchSelectionControllerTest, SelectionAllowedByDoubleTapOnEditable) {
+  gfx::RectF start_rect(5, 5, 0, 10);
+  gfx::RectF end_rect(50, 5, 0, 10);
+  bool visible = true;
+
+  controller().OnSelectionEditable(true);
+
+  // If the user double tap selects text in an editable region, the first tap
+  // will register insertion and the second tap selection.
+  OnTapEvent();
+  ChangeInsertion(start_rect, visible);
+  EXPECT_THAT(GetAndResetEvents(),
+              ElementsAre(SELECTION_ESTABLISHED, INSERTION_HANDLE_SHOWN));
+
+  OnDoubleTapEvent();
+  ChangeSelection(start_rect, visible, end_rect, visible);
+  EXPECT_THAT(GetAndResetEvents(),
+              ElementsAre(INSERTION_HANDLE_CLEARED, SELECTION_HANDLES_SHOWN));
+}
+
 TEST_F(TouchSelectionControllerTest, SelectionAllowsEmptyUpdateAfterLongPress) {
   gfx::RectF start_rect(5, 5, 0, 10);
   gfx::RectF end_rect(50, 5, 0, 10);
@@ -1070,11 +1106,11 @@ TEST_F(TouchSelectionControllerTest, HandlesShowOnTapInsideRect) {
   EXPECT_THAT(GetAndResetEvents(), ElementsAre(SELECTION_ESTABLISHED));
 
   // A point outside the rect should not be handled.
-  EXPECT_FALSE(controller().WillHandleTapEvent(outer_point));
+  EXPECT_FALSE(controller().WillHandleTapEvent(outer_point, 1));
   EXPECT_THAT(GetAndResetEvents(), IsEmpty());
 
   // A point inside the rect should be handled.
-  EXPECT_TRUE(controller().WillHandleTapEvent(inner_point));
+  EXPECT_TRUE(controller().WillHandleTapEvent(inner_point, 1));
   EXPECT_THAT(GetAndResetEvents(), ElementsAre(SELECTION_HANDLES_SHOWN));
 }