Add multipaste nudge metrics.

Bug: 1131573
Change-Id: Idec1dc25f75ddbeb38bde8ecda816a1d7bdd614a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2473677Reviewed-by: Yulun Wu <yulunwu@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Toni Baržić <tbarzic@chromium.org>
Reviewed-by: Alex Newcomer <newcomer@chromium.org>
Commit-Queue: Yulun Wu <yulunwu@chromium.org>
Auto-Submit: Yulun Wu <yulunwu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#822508}

ash/clipboard/clipboard_history_controller_impl.cc

@@ -11,6 +11,7 @@
 #include "ash/clipboard/clipboard_history_menu_model_adapter.h"
 #include "ash/clipboard/clipboard_history_resource_manager.h"
 #include "ash/clipboard/clipboard_history_util.h"
+#include "ash/clipboard/clipboard_nudge_controller.h"
 #include "ash/public/cpp/window_tree_host_lookup.h"
 #include "ash/resources/vector_icons/vector_icons.h"
 #include "ash/shell.h"
@@ -191,11 +192,20 @@ ClipboardHistoryControllerImpl::ClipboardHistoryControllerImpl()
           clipboard_history_.get())),
       accelerator_target_(std::make_unique<AcceleratorTarget>(this)),
       menu_delegate_(std::make_unique<MenuDelegate>(this)),
-      nudge_controller_(std::make_unique<ClipboardNudgeController>(
-          clipboard_history_.get())) {}
+      nudge_controller_(
+          std::make_unique<ClipboardNudgeController>(clipboard_history_.get(),
+                                                     this)) {}
 
 ClipboardHistoryControllerImpl::~ClipboardHistoryControllerImpl() = default;
 
+void ClipboardHistoryControllerImpl::AddObserver(Observer* observer) const {
+  observers_.AddObserver(observer);
+}
+
+void ClipboardHistoryControllerImpl::RemoveObserver(Observer* observer) const {
+  observers_.RemoveObserver(observer);
+}
+
 bool ClipboardHistoryControllerImpl::IsMenuShowing() const {
   return context_menu_ && context_menu_->IsRunning();
 }
@@ -240,6 +250,8 @@ void ClipboardHistoryControllerImpl::ShowMenu(
   // history menu shows.
   context_menu_->SelectMenuItemWithCommandId(
       ClipboardHistoryUtil::kFirstItemCommandId);
+  for (auto& observer : observers_)
+    observer.OnClipboardHistoryMenuShown();
 }
 
 bool ClipboardHistoryControllerImpl::CanShowMenu() const {
@@ -249,11 +261,15 @@ bool ClipboardHistoryControllerImpl::CanShowMenu() const {
 
 void ClipboardHistoryControllerImpl::ExecuteSelectedMenuItem(int event_flags) {
   DCHECK(IsMenuShowing());
+
   auto command = context_menu_->GetSelectedMenuItemCommand();
 
   // If no menu item is currently selected, we'll fallback to the first item.
   menu_delegate_->ExecuteCommand(
       command.value_or(ClipboardHistoryUtil::kFirstItemCommandId), event_flags);
+
+  for (auto& observer : observers_)
+    observer.OnClipboardHistoryPasted();
 }
 
 void ClipboardHistoryControllerImpl::ExecuteCommand(int command_id,

ash/clipboard/clipboard_history_controller_impl.h

@@ -10,9 +10,9 @@
 
 #include "ash/ash_export.h"
 #include "ash/clipboard/clipboard_history_item.h"
-#include "ash/clipboard/clipboard_nudge_controller.h"
 #include "ash/public/cpp/clipboard_history_controller.h"
 #include "base/memory/weak_ptr.h"
+#include "base/observer_list.h"
 
 namespace views {
 enum class MenuAnchorPosition;
@@ -27,12 +27,21 @@ namespace ash {
 class ClipboardHistory;
 class ClipboardHistoryMenuModelAdapter;
 class ClipboardHistoryResourceManager;
+class ClipboardNudgeController;
 
 // Shows a menu with the last few things saved in the clipboard when the
 // keyboard shortcut is pressed.
 class ASH_EXPORT ClipboardHistoryControllerImpl
     : public ClipboardHistoryController {
  public:
+  class Observer : public base::CheckedObserver {
+   public:
+    // Called when the clipboard history menu is shown.
+    virtual void OnClipboardHistoryMenuShown() = 0;
+    // Called when the user pastes from the clipboard history menu.
+    virtual void OnClipboardHistoryPasted() = 0;
+  };
+
   ClipboardHistoryControllerImpl();
   ClipboardHistoryControllerImpl(const ClipboardHistoryControllerImpl&) =
       delete;
@@ -40,6 +49,9 @@ class ASH_EXPORT ClipboardHistoryControllerImpl
       const ClipboardHistoryControllerImpl&) = delete;
   ~ClipboardHistoryControllerImpl() override;
 
+  void AddObserver(Observer* observer) const;
+  void RemoveObserver(Observer* observer) const;
+
   // Returns if the contextual menu is currently showing.
   bool IsMenuShowing() const;
 
@@ -98,6 +110,10 @@ class ASH_EXPORT ClipboardHistoryControllerImpl
   // Called when the contextual menu is closed.
   void OnMenuClosed();
 
+  // Mutable to allow adding/removing from |observers_| through a const
+  // ClipboardHistoryControllerImpl.
+  mutable base::ObserverList<Observer> observers_;
+
   // The menu being shown.
   std::unique_ptr<ClipboardHistoryMenuModelAdapter> context_menu_;
   // Used to keep track of what is being copied to the clipboard.

ash/clipboard/clipboard_history_controller_unittest.cc

@@ -7,6 +7,7 @@
 #include <memory>
 
 #include "ash/app_list/app_list_controller_impl.h"
+#include "ash/clipboard/clipboard_history.h"
 #include "ash/public/cpp/clipboard_image_model_factory.h"
 #include "ash/session/session_controller_impl.h"
 #include "ash/shell.h"

ash/clipboard/clipboard_nudge_controller.cc

@@ -11,6 +11,8 @@
 #include "ash/session/session_controller_impl.h"
 #include "ash/shell.h"
 #include "base/logging.h"
+#include "base/metrics/histogram_functions.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/no_destructor.h"
 #include "base/util/values/values_util.h"
 #include "chromeos/constants/chromeos_features.h"
@@ -25,14 +27,21 @@ namespace {
 constexpr char kShownCount[] = "shown_count";
 constexpr char kLastTimeShown[] = "last_time_shown";
 
+// The maximum number of 1 second buckets used to record the time between
+// showing the nudge and recording the feature being opened/used.
+constexpr int kBucketCount = 61;
+
 }  // namespace
 
 namespace ash {
 
 ClipboardNudgeController::ClipboardNudgeController(
-    ClipboardHistory* clipboard_history)
-    : clipboard_history_(clipboard_history) {
+    ClipboardHistory* clipboard_history,
+    ClipboardHistoryControllerImpl* clipboard_history_controller)
+    : clipboard_history_(clipboard_history),
+      clipboard_history_controller_(clipboard_history_controller) {
   clipboard_history_->AddObserver(this);
+  clipboard_history_controller_->AddObserver(this);
   ui::ClipboardMonitor::GetInstance()->AddObserver(this);
   if (chromeos::features::IsClipboardHistoryNudgeSessionResetEnabled())
     Shell::Get()->session_controller()->AddObserver(this);
@@ -40,6 +49,7 @@ ClipboardNudgeController::ClipboardNudgeController(
 
 ClipboardNudgeController::~ClipboardNudgeController() {
   clipboard_history_->RemoveObserver(this);
+  clipboard_history_controller_->RemoveObserver(this);
   ui::ClipboardMonitor::GetInstance()->RemoveObserver(this);
   if (chromeos::features::IsClipboardHistoryNudgeSessionResetEnabled())
     Shell::Get()->session_controller()->RemoveObserver(this);
@@ -119,6 +129,13 @@ void ClipboardNudgeController::ShowNudge() {
   hide_nudge_timer_.Start(FROM_HERE, kNudgeShowTime,
                           base::BindOnce(&ClipboardNudgeController::HideNudge,
                                          weak_ptr_factory_.GetWeakPtr()));
+  last_shown_time_ = GetTime();
+
+  // Tracks the number of times the ClipboardHistory nudge is shown.
+  // This allows us to understand the conversion rate of showing a nudge to
+  // a user opening and then using the clipboard history feature.
+  base::UmaHistogramExactLinear(
+      "Ash.ClipboardHistory.ContextualNudge.ShownCount", 1, 1);
 }
 
 void ClipboardNudgeController::HideNudge() {
@@ -136,6 +153,30 @@ void ClipboardNudgeController::HandleNudgeShown() {
   update->SetPath(kLastTimeShown, util::TimeToValue(GetTime()));
 }
 
+void ClipboardNudgeController::OnClipboardHistoryMenuShown() {
+  if (last_shown_time_.is_null())
+    return;
+  base::TimeDelta time_since_shown = GetTime() - last_shown_time_;
+
+  // Tracks the amount of time between showing the user a nudge and the user
+  // opening the ClipboardHistory menu.
+  base::UmaHistogramExactLinear(
+      "Ash.ClipboardHistory.ContextualNudge.NudgeToFeatureOpenTime",
+      time_since_shown.InSeconds(), kBucketCount);
+}
+
+void ClipboardNudgeController::OnClipboardHistoryPasted() {
+  if (last_shown_time_.is_null())
+    return;
+  base::TimeDelta time_since_shown = GetTime() - last_shown_time_;
+
+  // Tracks the amount of time between showing the user a nudge and the user
+  // using the ClipboardHistory feature.
+  base::UmaHistogramExactLinear(
+      "Ash.ClipboardHistory.ContextualNudge.NudgeToFeatureUseTime",
+      time_since_shown.InSeconds(), kBucketCount);
+}
+
 void ClipboardNudgeController::OverrideClockForTesting(
     base::Clock* test_clock) {
   DCHECK(!g_clock_override);

ash/clipboard/clipboard_nudge_controller.h

@@ -7,6 +7,7 @@
 
 #include "ash/ash_export.h"
 #include "ash/clipboard/clipboard_history.h"
+#include "ash/clipboard/clipboard_history_controller_impl.h"
 #include "ash/public/cpp/session/session_observer.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/clock.h"
@@ -31,11 +32,15 @@ enum class ClipboardState {
   kShouldShowNudge = 4,
 };
 
-class ASH_EXPORT ClipboardNudgeController : public ClipboardHistory::Observer,
+class ASH_EXPORT ClipboardNudgeController
+    : public ClipboardHistory::Observer,
       public ui::ClipboardObserver,
-                                            public SessionObserver {
+      public SessionObserver,
+      public ClipboardHistoryControllerImpl::Observer {
  public:
-  ClipboardNudgeController(ClipboardHistory* clipboard_history);
+  ClipboardNudgeController(
+      ClipboardHistory* clipboard_history,
+      ClipboardHistoryControllerImpl* clipboard_history_controller);
   ClipboardNudgeController(const ClipboardNudgeController&) = delete;
   ClipboardNudgeController& operator=(const ClipboardNudgeController&) = delete;
   ~ClipboardNudgeController() override;
@@ -55,6 +60,10 @@ class ASH_EXPORT ClipboardNudgeController : public ClipboardHistory::Observer,
   // Resets nudge state and show nudge timer.
   void HandleNudgeShown();
 
+  // ClipboardHistoryControllerImpl:
+  void OnClipboardHistoryMenuShown() override;
+  void OnClipboardHistoryPasted() override;
+
   // Test methods for overriding and resetting the clock used by GetTime.
   void OverrideClockForTesting(base::Clock* test_clock);
   void ClearClockOverrideForTesting();
@@ -78,9 +87,15 @@ class ASH_EXPORT ClipboardNudgeController : public ClipboardHistory::Observer,
   // Hides the nudge widget.
   void HideNudge();
 
+  // Time the nudge was last shown.
+  base::Time last_shown_time_;
+
   // Owned by ClipboardHistoryController.
   const ClipboardHistory* clipboard_history_;
 
+  // Owned by ash/Shell.
+  const ClipboardHistoryControllerImpl* const clipboard_history_controller_;
+
   // Current clipboard state.
   ClipboardState clipboard_state_ = ClipboardState::kInit;
   // The timestamp of the most recent paste.

tools/metrics/histograms/histograms_xml/ash/histograms.xml

@@ -272,6 +272,41 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
   </summary>
 </histogram>
 
+<histogram name="Ash.ClipboardHistory.ContextualNudge.NudgeToFeatureOpenTime"
+    units="seconds" expires_after="2021-09-01">
+  <owner>yulunwu@chromium.org</owner>
+  <owner>newcomer@chromium.org</owner>
+  <summary>
+    The number of seconds between the user being shown the clipboard history
+    contextual nudge and the opening the clipboard history menu. The sum over
+    this histogram will also be used to measure the conversion rate between
+    showing the nudge and the clipboard history feature being opened.
+  </summary>
+</histogram>
+
+<histogram name="Ash.ClipboardHistory.ContextualNudge.NudgeToFeatureUseTime"
+    units="seconds" expires_after="2021-09-01">
+  <owner>yulunwu@chromium.org</owner>
+  <owner>newcomer@chromium.org</owner>
+  <summary>
+    The number of seconds between the user being shown the clipboard history
+    contextual nudge and the user pasting with the clipboard history feature.
+    The sum over this histogram will also be used to measure the conversion rate
+    between showing the nudge and the clipboard history feature being used.
+  </summary>
+</histogram>
+
+<histogram name="Ash.ClipboardHistory.ContextualNudge.ShownCount"
+    enum="BooleanHit" expires_after="2021-09-01">
+  <owner>yulunwu@chromium.org</owner>
+  <owner>newcomer@chromium.org</owner>
+  <summary>
+    The number of times the clipboard history contextual nudge has been shown.
+    This number will be used as the baseline against the sum of the
+    NudgeToFeatureUseTime and NudgeToFeatureOpenTime.
+  </summary>
+</histogram>
+
 <histogram base="true" name="Ash.ContextualNudgeDismissContext"
     enum="ContextualNudgeDismissContext" expires_after="M86">
 <!-- Name completed by histogram_suffixes name="ContextualNudgesNames" -->