Only exclude workarea from touch-exploration with active shell-surface

ash/ash_touch_exploration_manager_chromeos.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 "ash/ash_touch_exploration_manager_chromeos.h"
 
+#include "ash/aura/wm_root_window_controller_aura.h"
 #include "ash/common/accessibility_delegate.h"
 #include "ash/common/system/tray/system_tray_notifier.h"
 #include "ash/common/wm_shell.h"
+#include "ash/common/wm_window.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/wm/window_util.h"
 #include "base/command_line.h"
 #include "chromeos/audio/chromeos_sounds.h"
 #include "chromeos/audio/cras_audio_handler.h"
 #include "chromeos/chromeos_switches.h"
 #include "ui/chromeos/touch_exploration_controller.h"
 #include "ui/wm/public/activation_client.h"
 
 namespace ash {
 
 AshTouchExplorationManager::AshTouchExplorationManager(
     RootWindowController* root_window_controller)
     : root_window_controller_(root_window_controller),
       audio_handler_(chromeos::CrasAudioHandler::Get()) {
   WmShell::Get()->system_tray_notifier()->AddAccessibilityObserver(this);
   Shell::GetInstance()->activation_client()->AddObserver(this);
+  display::Screen::GetScreen()->AddObserver(this);
   UpdateTouchExplorationState();
 }
 
 AshTouchExplorationManager::~AshTouchExplorationManager() {
   SystemTrayNotifier* system_tray_notifier =
       WmShell::Get()->system_tray_notifier();
   if (system_tray_notifier)
     system_tray_notifier->RemoveAccessibilityObserver(this);
   Shell::GetInstance()->activation_client()->RemoveObserver(this);
+  display::Screen::GetScreen()->RemoveObserver(this);
 }
 
 void AshTouchExplorationManager::OnAccessibilityModeChanged(
     AccessibilityNotificationVisibility notify) {
   UpdateTouchExplorationState();
 }
 
 void AshTouchExplorationManager::SetOutputLevel(int volume) {
   if (volume > 0) {
     if (audio_handler_->IsOutputMuted()) {
@@ skipping 34 matching lines @@
 void AshTouchExplorationManager::PlayEnterScreenEarcon() {
   WmShell::Get()->accessibility_delegate()->PlayEarcon(
       chromeos::SOUND_ENTER_SCREEN);
 }
 
 void AshTouchExplorationManager::HandleAccessibilityGesture(
     ui::AXGesture gesture) {
   WmShell::Get()->accessibility_delegate()->HandleAccessibilityGesture(gesture);
 }
 
+void AshTouchExplorationManager::OnDisplayMetricsChanged(
+    const display::Display& display,
+    uint32_t changed_metrics) {
+  if (root_window_controller_->wm_root_window_controller()
+          ->GetWindow()
+          ->GetDisplayNearestWindow()
+          .id() == display.id())
+    UpdateTouchExplorationState();
+}
+
 void AshTouchExplorationManager::OnWindowActivated(
     aura::client::ActivationChangeObserver::ActivationReason reason,
     aura::Window* gained_active,
     aura::Window* lost_active) {
   UpdateTouchExplorationState();
 }
 
 void AshTouchExplorationManager::SetTouchAccessibilityAnchorPoint(
     const gfx::Point& anchor_point) {
   if (touch_exploration_controller_) {
     touch_exploration_controller_->SetTouchAccessibilityAnchorPoint(
         anchor_point);
   }
 }
 
 void AshTouchExplorationManager::UpdateTouchExplorationState() {
   // Comes from components/exo/shell_surface.cc.
   const char kExoShellSurfaceWindowName[] = "ExoShellSurface";
 
   // See crbug.com/603745 for more details.
   const bool pass_through_surface =
       wm::GetActiveWindow() &&
       wm::GetActiveWindow()->name() == kExoShellSurfaceWindowName;
 
   const bool spoken_feedback_enabled =
       WmShell::Get()->accessibility_delegate()->IsSpokenFeedbackEnabled();
 
-  if (!pass_through_surface && spoken_feedback_enabled &&
-      !touch_exploration_controller_.get()) {
-    touch_exploration_controller_.reset(new ui::TouchExplorationController(
-        root_window_controller_->GetRootWindow(), this));
-  } else if (!spoken_feedback_enabled || pass_through_surface) {
-    touch_exploration_controller_.reset();
-    if (spoken_feedback_enabled) {
+  if (spoken_feedback_enabled) {
+    if (!touch_exploration_controller_.get()) {
+      touch_exploration_controller_ =
+          base::MakeUnique<ui::TouchExplorationController>(
+              root_window_controller_->GetRootWindow(), this);
+    }
+    if (pass_through_surface) {
+      const gfx::Rect& work_area =
+          root_window_controller_->wm_root_window_controller()
+              ->GetWindow()
+              ->GetDisplayNearestWindow()
+              .work_area();
+      touch_exploration_controller_->SetExcludeBounds(work_area);
       SilenceSpokenFeedback();
       WmShell::Get()->accessibility_delegate()->ClearFocusHighlight();
+    } else {
+      touch_exploration_controller_->SetExcludeBounds(gfx::Rect());
     }
+  } else {
+    touch_exploration_controller_.reset();
   }
 }
 
 bool AshTouchExplorationManager::VolumeAdjustSoundEnabled() {
   return !base::CommandLine::ForCurrentProcess()->HasSwitch(
       chromeos::switches::kDisableVolumeAdjustSound);
 }
 
 }  // namespace ash