Make the workspace cycler animation parameters editable via chrome://gesture

chrome/browser/ui/gesture_prefs_observer_factory_aura.cc

Index: chrome/browser/ui/gesture_prefs_observer_factory_aura.cc
diff --git a/chrome/browser/ui/gesture_prefs_observer_factory_aura.cc b/chrome/browser/ui/gesture_prefs_observer_factory_aura.cc
index 4d79c02de5656f45b5837398e479b2c13e9ced41..7f256b82c789a991cdc3fbc59291e72f72a18ea1 100644
--- a/chrome/browser/ui/gesture_prefs_observer_factory_aura.cc
+++ b/chrome/browser/ui/gesture_prefs_observer_factory_aura.cc
@@ -4,6 +4,8 @@
 
 #include "chrome/browser/ui/gesture_prefs_observer_factory_aura.h"
 
+#include <vector>
+
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/compiler_specific.h"
@@ -20,6 +22,14 @@
 #include "content/public/common/renderer_preferences.h"
 #include "ui/base/gestures/gesture_configuration.h"
 
+#if defined(USE_ASH)
+#include "ash/wm/workspace/workspace_cycler_configuration.h"
+#endif  // USE_ASH
+
+#if defined(USE_ASH)
+using ash::WorkspaceCyclerConfiguration;
+#endif  // USE_ASH
+
 using ui::GestureConfiguration;
 
 namespace {
@@ -29,15 +39,11 @@ struct OverscrollPref {
   content::OverscrollConfig config;
 };
 
-// This class manages gesture configuration preferences.
-class GesturePrefsObserver : public ProfileKeyedService {
- public:
-  explicit GesturePrefsObserver(PrefService* prefs);
-  virtual ~GesturePrefsObserver();
-
-  static const OverscrollPref* GetOverscrollPrefs() {
+const std::vector<OverscrollPref>& GetOverscrollPrefs() {
+  CR_DEFINE_STATIC_LOCAL(std::vector<OverscrollPref>, overscroll_prefs, ());
+  if (overscroll_prefs.empty()) {
     using namespace content;
-    static OverscrollPref overscroll_prefs[] = {
+    const OverscrollPref kOverscrollPrefs[] = {
       { prefs::kOverscrollHorizontalThresholdComplete,
         OVERSCROLL_CONFIG_HORIZ_THRESHOLD_COMPLETE },
       { prefs::kOverscrollVerticalThresholdComplete,
@@ -48,12 +54,62 @@ class GesturePrefsObserver : public ProfileKeyedService {
         OVERSCROLL_CONFIG_HORIZ_RESIST_AFTER },
       { prefs::kOverscrollVerticalResistThreshold,
         OVERSCROLL_CONFIG_VERT_RESIST_AFTER },
-      { NULL,
-        OVERSCROLL_CONFIG_NONE },
     };
+    overscroll_prefs.assign(kOverscrollPrefs,
+                            kOverscrollPrefs + arraysize(kOverscrollPrefs));
+  }
+  return overscroll_prefs;
+}
+
+#if defined(USE_ASH)
+struct WorkspaceCyclerPref {
+  const char* pref_name;
+  WorkspaceCyclerConfiguration::Property property;
+};
 
-    return overscroll_prefs;
+const std::vector<WorkspaceCyclerPref>& GetWorkspaceCyclerPrefs() {
+  CR_DEFINE_STATIC_LOCAL(std::vector<WorkspaceCyclerPref>, cycler_prefs, ());
+  if (cycler_prefs.empty() && WorkspaceCyclerConfiguration::IsCyclerEnabled()) {
+    const WorkspaceCyclerPref kCyclerPrefs[] = {
+      { prefs::kWorkspaceCyclerShallowerThanSelectedYOffsets,
+        WorkspaceCyclerConfiguration::SHALLOWER_THAN_SELECTED_Y_OFFSETS },
+      { prefs::kWorkspaceCyclerDeeperThanSelectedYOffsets,
+        WorkspaceCyclerConfiguration::DEEPER_THAN_SELECTED_Y_OFFSETS },
+      { prefs::kWorkspaceCyclerSelectedYOffset,
+        WorkspaceCyclerConfiguration::SELECTED_Y_OFFSET },
+      { prefs::kWorkspaceCyclerSelectedScale,
+        WorkspaceCyclerConfiguration::SELECTED_SCALE },
+      { prefs::kWorkspaceCyclerMinScale,
+        WorkspaceCyclerConfiguration::MIN_SCALE },
+      { prefs::kWorkspaceCyclerMaxScale,
+        WorkspaceCyclerConfiguration::MAX_SCALE },
+      { prefs::kWorkspaceCyclerMinBrightness,
+        WorkspaceCyclerConfiguration::MIN_BRIGHTNESS },
+      { prefs::kWorkspaceCyclerBackgroundOpacity,
+        WorkspaceCyclerConfiguration::BACKGROUND_OPACITY },
+      { prefs::kWorkspaceCyclerDistanceToInitiateCycling,
+        WorkspaceCyclerConfiguration::DISTANCE_TO_INITIATE_CYCLING },
+      { prefs::kWorkspaceCyclerScrollDistanceToCycleToNextWorkspace,
+        WorkspaceCyclerConfiguration::
+            SCROLL_DISTANCE_TO_CYCLE_TO_NEXT_WORKSPACE },
+      { prefs::kWorkspaceCyclerCyclerStepAnimationDurationRatio,
+        WorkspaceCyclerConfiguration::CYCLER_STEP_ANIMATION_DURATION_RATIO },
+      { prefs::kWorkspaceCyclerStartCyclerAnimationDuration,
+        WorkspaceCyclerConfiguration::START_CYCLER_ANIMATION_DURATION },
+      { prefs::kWorkspaceCyclerStopCyclerAnimationDuration,
+        WorkspaceCyclerConfiguration::STOP_CYCLER_ANIMATION_DURATION },
+    };
+    cycler_prefs.assign(kCyclerPrefs, kCyclerPrefs + arraysize(kCyclerPrefs));
   }
+  return cycler_prefs;
+}
+#endif  // USE_ASH
+
+// This class manages gesture configuration preferences.
+class GesturePrefsObserver : public ProfileKeyedService {
+ public:
+  explicit GesturePrefsObserver(PrefService* prefs);
+  virtual ~GesturePrefsObserver();
 
   // ProfileKeyedService implementation.
   virtual void Shutdown() OVERRIDE;
@@ -71,6 +127,7 @@ class GesturePrefsObserver : public ProfileKeyedService {
   // Notification helper to push overscroll preferences into
   // content.
   void UpdateOverscrollPrefs();
+  void UpdateWorkspaceCyclerPrefs();
 
   PrefChangeRegistrar registrar_;
   PrefService* prefs_;
@@ -109,14 +166,6 @@ const char* kPrefsToObserve[] = {
   prefs::kSemiLongPressTimeInSeconds,
 };
 
-const char* kOverscrollPrefs[] = {
-  prefs::kOverscrollHorizontalThresholdComplete,
-  prefs::kOverscrollVerticalThresholdComplete,
-  prefs::kOverscrollMinimumThresholdStart,
-  prefs::kOverscrollHorizontalResistThreshold,
-  prefs::kOverscrollVerticalResistThreshold,
-};
-
 const char* kFlingTouchpadPrefs[] = {
   prefs::kFlingCurveTouchpadAlpha,
   prefs::kFlingCurveTouchpadBeta,
@@ -141,13 +190,22 @@ GesturePrefsObserver::GesturePrefsObserver(PrefService* prefs)
 
   for (size_t i = 0; i < arraysize(kPrefsToObserve); ++i)
     registrar_.Add(kPrefsToObserve[i], callback);
-  for (size_t i = 0; i < arraysize(kOverscrollPrefs); ++i)
-    registrar_.Add(kOverscrollPrefs[i], callback);
+
+  const std::vector<OverscrollPref>& overscroll_prefs = GetOverscrollPrefs();
+  for (size_t i = 0; i < overscroll_prefs.size(); ++i)
+    registrar_.Add(overscroll_prefs[i].pref_name, callback);
 
   for (size_t i = 0; i < arraysize(kFlingTouchpadPrefs); ++i)
     registrar_.Add(kFlingTouchpadPrefs[i], notify_callback);
   for (size_t i = 0; i < arraysize(kFlingTouchscreenPrefs); ++i)
     registrar_.Add(kFlingTouchscreenPrefs[i], notify_callback);
+
+#if defined(USE_ASH)
+  const std::vector<WorkspaceCyclerPref>& cycler_prefs =
+      GetWorkspaceCyclerPrefs();
+  for (size_t i = 0; i < cycler_prefs.size(); ++i)
+    registrar_.Add(cycler_prefs[i].pref_name, callback);
+#endif  // USE_ASH
 }
 
 GesturePrefsObserver::~GesturePrefsObserver() {}
@@ -230,17 +288,35 @@ void GesturePrefsObserver::Update() {
           prefs::kRailStartProportion));
 
   UpdateOverscrollPrefs();
+  UpdateWorkspaceCyclerPrefs();
 }
 
 void GesturePrefsObserver::UpdateOverscrollPrefs() {
-  const OverscrollPref* overscroll_prefs =
-      GesturePrefsObserver::GetOverscrollPrefs();
-  for (int i = 0; overscroll_prefs[i].pref_name; ++i) {
+  const std::vector<OverscrollPref>& overscroll_prefs = GetOverscrollPrefs();
+  for (size_t i = 0; i < overscroll_prefs.size(); ++i) {
     content::SetOverscrollConfig(overscroll_prefs[i].config,
         static_cast<float>(prefs_->GetDouble(overscroll_prefs[i].pref_name)));
   }
 }
 
+void GesturePrefsObserver::UpdateWorkspaceCyclerPrefs() {
+#if defined(USE_ASH)
+  const std::vector<WorkspaceCyclerPref>& cycler_prefs =
+      GetWorkspaceCyclerPrefs();
+  for (size_t i = 0; i < cycler_prefs.size(); ++i) {
+    WorkspaceCyclerConfiguration::Property property =
+        cycler_prefs[i].property;
+    if (WorkspaceCyclerConfiguration::IsListProperty(property)) {
+      WorkspaceCyclerConfiguration::SetListValue(property,
+          *prefs_->GetList(cycler_prefs[i].pref_name));
+    } else {
+      WorkspaceCyclerConfiguration::SetDouble(property,
+          prefs_->GetDouble(cycler_prefs[i].pref_name));
+    }
+  }
+#endif  // USE_ASH
+}
+
 void GesturePrefsObserver::Notify() {
   // Must do a notify to distribute the changes to all renderers.
   content::NotificationService* service =
@@ -271,10 +347,9 @@ ProfileKeyedService* GesturePrefsObserverFactoryAura::BuildServiceInstanceFor(
 
 void GesturePrefsObserverFactoryAura::RegisterOverscrollPrefs(
     PrefRegistrySyncable* registry) {
-  const OverscrollPref* overscroll_prefs =
-      GesturePrefsObserver::GetOverscrollPrefs();
+  const std::vector<OverscrollPref>& overscroll_prefs = GetOverscrollPrefs();
 
-  for (int i = 0; overscroll_prefs[i].pref_name; ++i) {
+  for (size_t i = 0; i < overscroll_prefs.size(); ++i) {
     registry->RegisterDoublePref(
         overscroll_prefs[i].pref_name,
         content::GetOverscrollConfig(overscroll_prefs[i].config),
@@ -297,6 +372,29 @@ void GesturePrefsObserverFactoryAura::RegisterFlingCurveParameters(
                                  PrefRegistrySyncable::UNSYNCABLE_PREF);
 }
 
+void GesturePrefsObserverFactoryAura::RegisterWorkspaceCyclerPrefs(
+    PrefRegistrySyncable* registry) {
+#if defined(USE_ASH)
+  const std::vector<WorkspaceCyclerPref>& cycler_prefs =
+      GetWorkspaceCyclerPrefs();
+  for (size_t i = 0; i < cycler_prefs.size(); ++i) {
+    WorkspaceCyclerConfiguration::Property property =
+        cycler_prefs[i].property;
+    if (WorkspaceCyclerConfiguration::IsListProperty(property)) {
+      registry->RegisterListPref(
+          cycler_prefs[i].pref_name,
+          WorkspaceCyclerConfiguration::GetListValue(property).DeepCopy(),
+          PrefRegistrySyncable::UNSYNCABLE_PREF);
+    } else {
+      registry->RegisterDoublePref(
+          cycler_prefs[i].pref_name,
+          WorkspaceCyclerConfiguration::GetDouble(property),
+          PrefRegistrySyncable::UNSYNCABLE_PREF);
+    }
+  }
+#endif  // USE_ASH
+}
+
 void GesturePrefsObserverFactoryAura::DeprecatedRegisterUserPrefs(
     PrefService* prefs,
     PrefRegistrySyncable* registry) {
@@ -415,6 +513,7 @@ void GesturePrefsObserverFactoryAura::DeprecatedRegisterUserPrefs(
 
   RegisterOverscrollPrefs(registry);
   RegisterFlingCurveParameters(registry);
+  RegisterWorkspaceCyclerPrefs(registry);
 }
 
 bool GesturePrefsObserverFactoryAura::ServiceIsCreatedWithProfile() const {