Added touch event permutations test to touch_exploration_controller.

ui/chromeos/touch_exploration_controller.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 "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "ui/aura/client/cursor_client.h"
 #include "ui/aura/window.h"
@@ skipping 11 matching lines @@
 // In ChromeOS, VKEY_LWIN is synonymous for the search key.
 const ui::KeyboardCode kChromeOSSearchKey = ui::VKEY_LWIN;
 }  // namespace
 
 TouchExplorationController::TouchExplorationController(
     aura::Window* root_window)
     : root_window_(root_window),
       state_(NO_FINGERS_DOWN),
       event_handler_for_testing_(NULL),
       gesture_provider_(this),
-      prev_state_(NO_FINGERS_DOWN) {
+      prev_state_(NO_FINGERS_DOWN),
+      VLOG_on_(true) {
   CHECK(root_window);
   root_window->GetHost()->GetEventSource()->AddEventRewriter(this);
 }
 
 
 TouchExplorationController::~TouchExplorationController() {
   root_window_->GetHost()->GetEventSource()->RemoveEventRewriter(this);
 }
 
 void TouchExplorationController::CallTapTimerNowForTesting() {
   DCHECK(tap_timer_.IsRunning());
   tap_timer_.Stop();
   OnTapTimerFired();
 }
 
+void TouchExplorationController::CallTapTimerNowIfRunningForTesting() {
+  if (tap_timer_.IsRunning()) {
+    tap_timer_.Stop();
+    OnTapTimerFired();
+  }
+}
+
 void TouchExplorationController::SetEventHandlerForTesting(
     ui::EventHandler* event_handler_for_testing) {
   event_handler_for_testing_ = event_handler_for_testing;
 }
 
 bool TouchExplorationController::IsInNoFingersDownStateForTesting() const {
   return state_ == NO_FINGERS_DOWN;
 }
 
 bool TouchExplorationController::IsInGestureInProgressStateForTesting() const {
   return state_ == GESTURE_IN_PROGRESS;
 }
 
+void TouchExplorationController::SuppressVLOGsForTesting(bool suppress) {
+    VLOG_on_ = !suppress;
+}
+
 ui::EventRewriteStatus TouchExplorationController::RewriteEvent(
     const ui::Event& event,
     scoped_ptr<ui::Event>* rewritten_event) {
   if (!event.IsTouchEvent()) {
     if (event.IsKeyEvent()) {
       const ui::KeyEvent& key_event = static_cast<const ui::KeyEvent&>(event);
-      VLOG(0) << "\nKeyboard event: " << key_event.name() << "\n"
-              << " Key code: " << key_event.key_code()
+      VLOG(0) << "\nKeyboard event: " << key_event.name()
+              << "\n Key code: " << key_event.key_code()
               << ", Flags: " << key_event.flags()
               << ", Is char: " << key_event.is_char();
     }
     return ui::EVENT_REWRITE_CONTINUE;
   }
   const ui::TouchEvent& touch_event = static_cast<const ui::TouchEvent&>(event);
 
   // If the tap timer should have fired by now but hasn't, run it now and
   // stop the timer. This is important so that behavior is consistent with
   // the timestamps of the events, and not dependent on the granularity of
@@ skipping 82 matching lines @@
                      gesture_detector_config_.double_tap_timeout,
                      this,
                      &TouchExplorationController::OnTapTimerFired);
     gesture_provider_.OnTouchEvent(event);
     gesture_provider_.OnTouchEventAck(false);
     ProcessGestureEvents();
     state_ = SINGLE_TAP_PRESSED;
     VLOG_STATE();
     return ui::EVENT_REWRITE_DISCARD;
   }
-  NOTREACHED() << "Unexpected event type received.";
+  NOTREACHED() << "Unexpected event type received: " << event.name();;
   return ui::EVENT_REWRITE_CONTINUE;
 }
 
 ui::EventRewriteStatus TouchExplorationController::InSingleTapPressed(
     const ui::TouchEvent& event, scoped_ptr<ui::Event>* rewritten_event) {
   const ui::EventType type = event.type();
 
   if (type == ui::ET_TOUCH_PRESSED) {
     // Adding a second finger within the timeout period switches to
     // passing through every event from the second finger and none form the
@@ skipping 33 matching lines @@
     if (velocity > gesture_detector_config_.minimum_swipe_velocity) {
       state_ = GESTURE_IN_PROGRESS;
       VLOG_STATE();
       return InGestureInProgress(event, rewritten_event);
     }
     EnterTouchToMouseMode();
     state_ = TOUCH_EXPLORATION;
     VLOG_STATE();
     return InTouchExploration(event, rewritten_event);
   }
-  NOTREACHED() << "Unexpected event type received.";
+  NOTREACHED() << "Unexpected event type received: " << event.name();;
   return ui::EVENT_REWRITE_CONTINUE;
 }
 
 ui::EventRewriteStatus
 TouchExplorationController::InSingleTapOrTouchExploreReleased(
     const ui::TouchEvent& event,
     scoped_ptr<ui::Event>* rewritten_event) {
   const ui::EventType type = event.type();
   // If there is more than one finger down, then discard to wait until only one
   // finger is or no fingers are down.
@@ skipping 14 matching lines @@
     // Rewrite at location of last touch exploration.
     rewritten_event->reset(
         new ui::TouchEvent(ui::ET_TOUCH_PRESSED,
                            last_touch_exploration_->location(),
                            event.touch_id(),
                            event.time_stamp()));
     (*rewritten_event)->set_flags(event.flags());
     state_ = DOUBLE_TAP_PRESSED;
     VLOG_STATE();
     return ui::EVENT_REWRITE_REWRITTEN;
+  } else if (type == ui::ET_TOUCH_RELEASED && !last_touch_exploration_) {
+    // If the previous press was discarded, we need to also handle its
+    // release.
+    if (current_touch_ids_.size() == 0) {
+      ResetToNoFingersDown();
+    }
+    return ui::EVENT_REWRITE_DISCARD;
+  } else if (type == ui::ET_TOUCH_MOVED){
+    return ui::EVENT_REWRITE_DISCARD;
   }
-  NOTREACHED() << "Unexpected event type received.";
+  NOTREACHED() << "Unexpected event type received: " << event.name();
   return ui::EVENT_REWRITE_CONTINUE;
 }
 
 ui::EventRewriteStatus TouchExplorationController::InDoubleTapPressed(
     const ui::TouchEvent& event, scoped_ptr<ui::Event>* rewritten_event) {
   const ui::EventType type = event.type();
   if (type == ui::ET_TOUCH_PRESSED) {
     return ui::EVENT_REWRITE_DISCARD;
   } else if (type == ui::ET_TOUCH_RELEASED || type == ui::ET_TOUCH_CANCELLED) {
     if (current_touch_ids_.size() != 0)
       return EVENT_REWRITE_DISCARD;
 
     // Rewrite release at location of last touch exploration with the same
     // id as the previous press.
     rewritten_event->reset(
         new ui::TouchEvent(ui::ET_TOUCH_RELEASED,
                            last_touch_exploration_->location(),
                            initial_press_->touch_id(),
                            event.time_stamp()));
     (*rewritten_event)->set_flags(event.flags());
     ResetToNoFingersDown();
     return ui::EVENT_REWRITE_REWRITTEN;
   } else if (type == ui::ET_TOUCH_MOVED) {
     return ui::EVENT_REWRITE_DISCARD;
   }
-  NOTREACHED() << "Unexpected event type received.";
+  NOTREACHED() << "Unexpected event type received: " << event.name();
   return ui::EVENT_REWRITE_CONTINUE;
 }
 
 ui::EventRewriteStatus TouchExplorationController::InTouchExploration(
     const ui::TouchEvent& event,
     scoped_ptr<ui::Event>* rewritten_event) {
   const ui::EventType type = event.type();
   if (type == ui::ET_TOUCH_PRESSED) {
     // Handle split-tap.
     initial_press_.reset(new TouchEvent(event));
@@ skipping 10 matching lines @@
     return ui::EVENT_REWRITE_REWRITTEN;
   } else if (type == ui::ET_TOUCH_RELEASED || type == ui::ET_TOUCH_CANCELLED) {
     initial_press_.reset(new TouchEvent(event));
     tap_timer_.Start(FROM_HERE,
                      gesture_detector_config_.double_tap_timeout,
                      this,
                      &TouchExplorationController::OnTapTimerFired);
     state_ = TOUCH_EXPLORE_RELEASED;
     VLOG_STATE();
   } else if (type != ui::ET_TOUCH_MOVED) {
-    NOTREACHED() << "Unexpected event type received.";
+    NOTREACHED() << "Unexpected event type received: " << event.name();
     return ui::EVENT_REWRITE_CONTINUE;
   }
 
   // Rewrite as a mouse-move event.
   *rewritten_event = CreateMouseMoveEvent(event.location(), event.flags());
   last_touch_exploration_.reset(new TouchEvent(event));
   return ui::EVENT_REWRITE_REWRITTEN;
 }
 
 ui::EventRewriteStatus TouchExplorationController::InGestureInProgress(
@@ skipping 86 matching lines @@
     if (event.touch_id() == last_two_to_one_->touch_id()) {
       last_two_to_one_.reset(new TouchEvent(event));
       rewritten_event->reset(new ui::TouchEvent(ui::ET_TOUCH_MOVED,
                                                 event.location(),
                                                 event.touch_id(),
                                                 event.time_stamp()));
       (*rewritten_event)->set_flags(event.flags());
       return ui::EVENT_REWRITE_REWRITTEN;
     }
   }
-  NOTREACHED() << "Unexpected event type received";
+  NOTREACHED() << "Unexpected event type received: " << event.name();
   return ui::EVENT_REWRITE_CONTINUE;
 }
 
 ui::EventRewriteStatus TouchExplorationController::InPassthrough(
     const ui::TouchEvent& event,
     scoped_ptr<ui::Event>* rewritten_event) {
   ui::EventType type = event.type();
 
   if (!(type == ui::ET_TOUCH_RELEASED || type == ui::ET_TOUCH_CANCELLED ||
         type == ui::ET_TOUCH_MOVED || type == ui::ET_TOUCH_PRESSED)) {
-    NOTREACHED() << "Unexpected event type received.";
+    NOTREACHED() << "Unexpected event type received: " << event.name();
     return ui::EVENT_REWRITE_CONTINUE;
   }
 
   rewritten_event->reset(new ui::TouchEvent(
       type, event.location(), event.touch_id(), event.time_stamp()));
   (*rewritten_event)->set_flags(event.flags());
 
   if (current_touch_ids_.size() == 0) {
     ResetToNoFingersDown();
   }
@@ skipping 32 matching lines @@
         new ui::TouchEvent(ui::ET_TOUCH_RELEASED,
                            last_touch_exploration_->location(),
                            initial_press_->touch_id(),
                            event.time_stamp()));
     (*rewritten_event)->set_flags(event.flags());
     EnterTouchToMouseMode();
     state_ = TOUCH_EXPLORATION;
     VLOG_STATE();
     return ui::EVENT_REWRITE_REWRITTEN;
   }
-  NOTREACHED() << "Unexpected event type received.";
+  NOTREACHED() << "Unexpected event type received: " << event.name();
   return ui::EVENT_REWRITE_CONTINUE;
 }
 
 ui::EventRewriteStatus TouchExplorationController::InWaitForRelease(
     const ui::TouchEvent& event,
     scoped_ptr<ui::Event>* rewritten_event) {
   ui::EventType type = event.type();
   if (!(type == ui::ET_TOUCH_PRESSED || type == ui::ET_TOUCH_MOVED ||
         type == ui::ET_TOUCH_RELEASED || type == ui::ET_TOUCH_CANCELLED)) {
-    NOTREACHED() << "Unexpected event type received.";
+    NOTREACHED() << "Unexpected event type received: " << event.name();
     return ui::EVENT_REWRITE_CONTINUE;
   }
   if (current_touch_ids_.size() == 0) {
     state_ = NO_FINGERS_DOWN;
     VLOG_STATE();
     ResetToNoFingersDown();
   }
   return EVENT_REWRITE_DISCARD;
 }
 
@@ skipping 123 matching lines @@
 }
 
 void TouchExplorationController::ResetToNoFingersDown() {
   state_ = NO_FINGERS_DOWN;
   VLOG_STATE();
   if (tap_timer_.IsRunning())
     tap_timer_.Stop();
 }
 
 void TouchExplorationController::VlogState(const char* function_name) {
+  if (!VLOG_on_)
+    return;
   if (prev_state_ == state_)
     return;
   prev_state_ = state_;
   const char* state_string = EnumStateToString(state_);
   VLOG(0) << "\n Function name: " << function_name
           << "\n State: " << state_string;
 }
 
 void TouchExplorationController::VlogEvent(const ui::TouchEvent& touch_event,
                                            const char* function_name) {
+  if (!VLOG_on_)
+    return;
+
   CHECK(touch_event.IsTouchEvent());
   if (prev_event_ != NULL &&
       prev_event_->type() == touch_event.type() &&
       prev_event_->touch_id() == touch_event.touch_id()){
     return;
   }
   // The above statement prevents events of the same type and id from being
   // printed in a row. However, if two fingers are down, they would both be
   // moving and alternating printing move events unless we check for this.
   if (prev_event_ != NULL &&
@@ skipping 34 matching lines @@
       return "TWO_TO_ONE_FINGER";
     case PASSTHROUGH:
       return "PASSTHROUGH";
     case WAIT_FOR_RELEASE:
       return "WAIT_FOR_RELEASE";
   }
   return "Not a state";
 }
 
 }  // namespace ui