Make touch accessibility gestures work with ChromeVox Next

ui/chromeos/touch_exploration_controller_unittest.cc

 // Copyright 2014 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.
 
 #include "ui/chromeos/touch_exploration_controller.h"
 
 #include <stddef.h>
 
 #include "base/macros.h"
 #include "base/test/simple_test_tick_clock.h"
@@ skipping 60 matching lines @@
     : public ui::TouchExplorationControllerDelegate {
  public:
   void SetOutputLevel(int volume) override {
     volume_changes_.push_back(volume);
   }
   void SilenceSpokenFeedback() override {}
   void PlayVolumeAdjustEarcon() override { ++num_times_adjust_sound_played_; }
   void PlayPassthroughEarcon() override { ++num_times_passthrough_played_; }
   void PlayExitScreenEarcon() override { ++num_times_exit_screen_played_; }
   void PlayEnterScreenEarcon() override { ++num_times_enter_screen_played_; }
+  void HandleAccessibilityGesture(ui::AXGesture gesture) override {
+    last_gesture_ = gesture;
+  }
 
   const std::vector<float> VolumeChanges() { return volume_changes_; }
   size_t NumAdjustSounds() { return num_times_adjust_sound_played_; }
   size_t NumPassthroughSounds() { return num_times_passthrough_played_; }
   size_t NumExitScreenSounds() { return num_times_exit_screen_played_; }
   size_t NumEnterScreenSounds() {
     return num_times_enter_screen_played_;
   }
+  ui::AXGesture GetLastGesture() { return last_gesture_; }
 
   void ResetCountersToZero() {
     num_times_adjust_sound_played_ = 0;
     num_times_passthrough_played_ = 0;
     num_times_exit_screen_played_ = 0;
     num_times_enter_screen_played_ = 0;
   }
 
  private:
   std::vector<float> volume_changes_;
   size_t num_times_adjust_sound_played_ = 0;
   size_t num_times_passthrough_played_ = 0;
   size_t num_times_exit_screen_played_ = 0;
   size_t num_times_enter_screen_played_ = 0;
+  ui::AXGesture last_gesture_ = ui::AX_GESTURE_NONE;
 };
 
 }  // namespace
 
 class TouchExplorationControllerTestApi {
  public:
   TouchExplorationControllerTestApi(
       TouchExplorationController* touch_exploration_controller) {
     touch_exploration_controller_.reset(touch_exploration_controller);
   }
@@ skipping 339 matching lines @@
 #define CONFIRM_EVENTS_ARE_MOUSE_AND_EQUAL(e1, e2) \
   ASSERT_NO_FATAL_FAILURE(ConfirmEventsAreMouseAndEqual(e1, e2))
 
 #define CONFIRM_EVENTS_ARE_KEY_AND_EQUAL(e1, e2) \
   ASSERT_NO_FATAL_FAILURE(ConfirmEventsAreKeyAndEqual(e1, e2))
 
 // TODO(mfomitchev): Need to investigate why we don't get mouse enter/exit
 // events when running these tests as part of ui_base_unittests. We do get them
 // when the tests are run as part of ash unit tests.
 
-// If a swipe has been successfully completed, then six key events will be
-// dispatched that correspond to shift+search+direction
-void AssertDirectionalNavigationEvents(const ScopedVector<ui::Event>& events,
-                                       ui::KeyboardCode direction) {
-  ASSERT_EQ(6U, events.size());
-  ui::KeyEvent shift_pressed(
-      ui::ET_KEY_PRESSED, ui::VKEY_SHIFT, ui::EF_SHIFT_DOWN);
-  ui::KeyEvent search_pressed(
-      ui::ET_KEY_PRESSED, ui::VKEY_LWIN, ui::EF_SHIFT_DOWN);
-  ui::KeyEvent direction_pressed(
-      ui::ET_KEY_PRESSED, direction, ui::EF_SHIFT_DOWN);
-  ui::KeyEvent direction_released(
-      ui::ET_KEY_RELEASED, direction, ui::EF_SHIFT_DOWN);
-  ui::KeyEvent search_released(
-      ui::ET_KEY_RELEASED, VKEY_LWIN, ui::EF_SHIFT_DOWN);
-  ui::KeyEvent shift_released(
-      ui::ET_KEY_RELEASED, ui::VKEY_SHIFT, ui::EF_NONE);
-  CONFIRM_EVENTS_ARE_KEY_AND_EQUAL(&shift_pressed, events[0]);
-  CONFIRM_EVENTS_ARE_KEY_AND_EQUAL(&search_pressed, events[1]);
-  CONFIRM_EVENTS_ARE_KEY_AND_EQUAL(&direction_pressed, events[2]);
-  CONFIRM_EVENTS_ARE_KEY_AND_EQUAL(&direction_released, events[3]);
-  CONFIRM_EVENTS_ARE_KEY_AND_EQUAL(&search_released, events[4]);
-  CONFIRM_EVENTS_ARE_KEY_AND_EQUAL(&shift_released, events[5]);
-}
-
 TEST_F(TouchExplorationTest, EntersTouchToMouseModeAfterPressAndDelay) {
   SwitchTouchExplorationMode(true);
   EXPECT_FALSE(IsInTouchToMouseMode());
   generator_->PressTouch();
   AdvanceSimulatedTimePastTapDelay();
   EXPECT_TRUE(IsInTouchToMouseMode());
 }
 
 TEST_F(TouchExplorationTest, EntersTouchToMouseModeAfterMoveOutsideSlop) {
   int slop = gesture_detector_config_.touch_slop;
@@ skipping 788 matching lines @@
   EXPECT_EQ(ui::ET_MOUSE_MOVED, captured_events[0]->type());
   EXPECT_EQ(ui::ET_MOUSE_MOVED, captured_events[1]->type());
   EXPECT_TRUE(IsInTouchToMouseMode());
   EXPECT_FALSE(IsInGestureInProgressState());
 }
 
 // A swipe+direction gesture should trigger a Shift+Search+Direction
 // keyboard event.
 TEST_F(TouchExplorationTest, GestureSwipe) {
   SwitchTouchExplorationMode(true);
-  std::vector<ui::KeyboardCode> directions;
-  directions.push_back(ui::VKEY_RIGHT);
-  directions.push_back(ui::VKEY_LEFT);
-  directions.push_back(ui::VKEY_UP);
-  directions.push_back(ui::VKEY_DOWN);
+
+  // Test all four swipe directions with 1 to 4 fingers.
+  struct GestureInfo {
+    int move_x;
+    int move_y;
+    int num_fingers;
+    ui::AXGesture expected_gesture;
+  } gestures_to_test[] = {
+    { -1,  0, 1, ui::AX_GESTURE_SWIPE_LEFT_1 },
+    {  0, -1, 1, ui::AX_GESTURE_SWIPE_UP_1 },
+    {  1,  0, 1, ui::AX_GESTURE_SWIPE_RIGHT_1 },
+    {  0,  1, 1, ui::AX_GESTURE_SWIPE_DOWN_1 },
+    { -1,  0, 2, ui::AX_GESTURE_SWIPE_LEFT_2 },
+    {  0, -1, 2, ui::AX_GESTURE_SWIPE_UP_2 },
+    {  1,  0, 2, ui::AX_GESTURE_SWIPE_RIGHT_2 },
+    {  0,  1, 2, ui::AX_GESTURE_SWIPE_DOWN_2 },
+    { -1,  0, 3, ui::AX_GESTURE_SWIPE_LEFT_3 },
+    {  0, -1, 3, ui::AX_GESTURE_SWIPE_UP_3 },
+    {  1,  0, 3, ui::AX_GESTURE_SWIPE_RIGHT_3 },
+    {  0,  1, 3, ui::AX_GESTURE_SWIPE_DOWN_3 },
+    { -1,  0, 4, ui::AX_GESTURE_SWIPE_LEFT_4 },
+    {  0, -1, 4, ui::AX_GESTURE_SWIPE_UP_4 },
+    {  1,  0, 4, ui::AX_GESTURE_SWIPE_RIGHT_4 },
+    {  0,  1, 4, ui::AX_GESTURE_SWIPE_DOWN_4 },
+  };
 
   // This value was taken from gesture_recognizer_unittest.cc in a swipe
   // detector test, since it seems to be about the right amount to get a swipe.
   const int kSteps = 15;
 
-  // There are gestures supported with up to four fingers.
-  for (int num_fingers = 1; num_fingers <= 4; num_fingers++) {
+  for (size_t i = 0; i < arraysize(gestures_to_test); ++i) {
+    const float distance = 2 * gesture_detector_config_.touch_slop + 1;
+    int move_x = gestures_to_test[i].move_x * distance;
+    int move_y = gestures_to_test[i].move_y * distance;
+    int num_fingers = gestures_to_test[i].num_fingers;
+    ui::AXGesture expected_gesture = gestures_to_test[i].expected_gesture;
+
     std::vector<gfx::Point> start_points;
     for (int j = 0; j < num_fingers; j++) {
       start_points.push_back(gfx::Point(j * 10 + 100, j * 10 + 200));
     }
     gfx::Point* start_points_array = &start_points[0];
-    const float distance = gesture_detector_config_.touch_slop + 1;
-    // Iterate through each swipe direction for this number of fingers.
-    for (std::vector<ui::KeyboardCode>::const_iterator it = directions.begin();
-         it != directions.end();
-         ++it) {
-      int move_x = 0;
-      int move_y = 0;
-      ui::KeyboardCode direction = *it;
-      switch (direction) {
-        case ui::VKEY_RIGHT:
-          move_x = distance;
-          break;
-        case ui::VKEY_LEFT:
-          move_x = 0 - distance;
-          break;
-        case ui::VKEY_UP:
-          move_y = 0 - distance;
-          break;
-        case ui::VKEY_DOWN:
-          move_y = distance;
-          break;
-        default:
-          return;
-      }
 
-      // A swipe is made when a fling starts
-      float delta_time =
-          distance / gesture_detector_config_.maximum_fling_velocity;
-      // delta_time is in seconds, so we convert to ms.
-      int delta_time_ms = floor(delta_time * 1000);
-      generator_->GestureMultiFingerScroll(num_fingers,
-                                           start_points_array,
-                                           delta_time_ms,
-                                           kSteps,
-                                           move_x * 2,
-                                           move_y * 2);
-
-      // The swipe registered and sent the appropriate key events.
-      const ScopedVector<ui::Event>& captured_events = GetCapturedEvents();
-      if (num_fingers == 1)
-        AssertDirectionalNavigationEvents(captured_events, direction);
-      else {
-        // Most of the time this is 2 right now, but two of the two finger
-        // swipes are mapped to chromevox commands which dispatch 6 key events,
-        // and these will probably be remapped a lot as we're developing.
-        ASSERT_GE(captured_events.size(), 2U);
-        std::vector<ui::Event>::size_type i;
-        for (i = 0; i != captured_events.size(); i++) {
-          EXPECT_TRUE(captured_events[i]->IsKeyEvent());
-        }
-      }
-      EXPECT_TRUE(IsInNoFingersDownState());
-      EXPECT_FALSE(IsInTouchToMouseMode());
-      EXPECT_FALSE(IsInGestureInProgressState());
-      ClearCapturedEvents();
-    }
+    // A swipe is made when a fling starts
+    float delta_time =
+        distance / gesture_detector_config_.maximum_fling_velocity;
+    // delta_time is in seconds, so we convert to ms.
+    int delta_time_ms = floor(delta_time * 1000);
+    generator_->GestureMultiFingerScroll(num_fingers,
+                                         start_points_array,
+                                         delta_time_ms,
+                                         kSteps,
+                                         move_x,
+                                         move_y);
+    EXPECT_EQ(expected_gesture, delegate_.GetLastGesture());
+    EXPECT_TRUE(IsInNoFingersDownState());
+    EXPECT_FALSE(IsInTouchToMouseMode());
+    EXPECT_FALSE(IsInGestureInProgressState());
+    ClearCapturedEvents();
   }
 }
 
 // Since there are so many permutations, this test is fairly slow. Therefore, it
 // is disabled and will be turned on to check during development.
 
 TEST_F(TouchExplorationTest, DISABLED_AllFingerPermutations) {
   SwitchTouchExplorationMode(true);
   SuppressVLOGs(true);
   // We will test all permutations of events from three different fingers
@@ skipping 551 matching lines @@
     generator_->PressTouch();
     generator_->MoveTouch(initial_press);
     generator_->MoveTouch(*point);
     generator_->ReleaseTouch();
     ASSERT_EQ(1U, delegate_.NumExitScreenSounds());
     delegate_.ResetCountersToZero();
   }
 }
 
 }  // namespace ui