Miscellaneous fixes to DataUse UI

chrome/browser/android/data_usage/data_use_ui_tab_model.cc

 // Copyright 2015 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 "chrome/browser/android/data_usage/data_use_ui_tab_model.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 38 matching lines @@
 
   // Clear out local state.
   TabEvents::iterator it = tab_events_.find(tab_id);
   if (it == tab_events_.end())
     return;
   tab_events_.erase(it);
 }
 
 void DataUseUITabModel::ReportCustomTabInitialNavigation(
     SessionID::id_type tab_id,
-    const std::string& url,
-    const std::string& package_name) {
+    const std::string& package_name,
+    const std::string& url) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   if (tab_id <= 0)
     return;
 
   if (data_use_tab_model_) {
     data_use_tab_model_->OnNavigationEvent(
         tab_id, DataUseTabModel::TRANSITION_CUSTOM_TAB, GURL(url),
         package_name);
   }
@@ skipping 11 matching lines @@
 }
 
 base::WeakPtr<DataUseUITabModel> DataUseUITabModel::GetWeakPtr() {
   DCHECK(thread_checker_.CalledOnValidThread());
   return weak_factory_.GetWeakPtr();
 }
 
 void DataUseUITabModel::NotifyTrackingStarting(SessionID::id_type tab_id) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
+  // Clear out the previous state if is equal to DATA_USE_CONTINUE_CLICKED. This
+  // ensures that MaybeCreateTabEvent can successfully insert |tab_id| into the
+  // map, and update its value to DATA_USE_TRACKING_STARTED.
+  RemoveTabEvent(tab_id, DATA_USE_CONTINUE_CLICKED);
+
   if (MaybeCreateTabEvent(tab_id, DATA_USE_TRACKING_STARTED))
     return;
   // Since tracking started before the UI could indicate that it ended, it is
   // not useful for UI to show that it started again.
   RemoveTabEvent(tab_id, DATA_USE_TRACKING_ENDED);
 }
 
 void DataUseUITabModel::NotifyTrackingEnding(SessionID::id_type tab_id) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   if (MaybeCreateTabEvent(tab_id, DATA_USE_TRACKING_ENDED))
     return;
   // Since tracking ended before the UI could indicate that it stated, it is not
   // useful for UI to show that it ended.
   RemoveTabEvent(tab_id, DATA_USE_TRACKING_STARTED);
+
+  // If the user clicked "Continue" before this navigation, then |tab_id| value
+  // would be set to DATA_USE_CONTINUE_CLICKED. In that case,
+  // MaybeCreateTabEvent above would have returned false. So, removing tab_id
+  // from the map below ensures that no UI is shown on the tab. This also
+  // resets the state of |tab_id|, so that dialog box or snackbar may be shown
+  // for future navigations.
+  RemoveTabEvent(tab_id, DATA_USE_CONTINUE_CLICKED);
 }
 
 bool DataUseUITabModel::HasDataUseTrackingStarted(SessionID::id_type tab_id) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   TabEvents::iterator it = tab_events_.find(tab_id);
   if (it == tab_events_.end())
     return false;
 
   return RemoveTabEvent(tab_id, DATA_USE_TRACKING_STARTED);
 }
 
+bool DataUseUITabModel::WouldDataUseTrackingEnd(
+    const std::string& url,
+    int page_transition,
+    SessionID::id_type tab_id) const {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  TabEvents::const_iterator it = tab_events_.find(tab_id);
+
+  if (it != tab_events_.end() && it->second == DATA_USE_CONTINUE_CLICKED)
+    return false;
+
+  DataUseTabModel::TransitionType transition_type;
+
+  if (!ConvertTransitionType(ui::PageTransitionFromInt(page_transition),
+                             &transition_type)) {
+    return false;
+  }
+
+  if (!data_use_tab_model_)
+    return false;
+
+  return data_use_tab_model_->WouldNavigationEventEndTracking(
+      tab_id, transition_type, GURL(url));
+}
+
+void DataUseUITabModel::UserClickedContinueOnDialogBox(
+    SessionID::id_type tab_id) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  TabEvents::iterator it = tab_events_.find(tab_id);
+  if (it != tab_events_.end())
+    tab_events_.erase(it);
+
+  MaybeCreateTabEvent(tab_id, DATA_USE_CONTINUE_CLICKED);
+}
+
 bool DataUseUITabModel::HasDataUseTrackingEnded(SessionID::id_type tab_id) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   TabEvents::iterator it = tab_events_.find(tab_id);
   if (it == tab_events_.end())
     return false;
 
   return RemoveTabEvent(tab_id, DATA_USE_TRACKING_ENDED);
 }
 
 bool DataUseUITabModel::MaybeCreateTabEvent(SessionID::id_type tab_id,
                                             DataUseTrackingEvent event) {
   DCHECK(thread_checker_.CalledOnValidThread());
   return tab_events_.insert(std::make_pair(tab_id, event)).second;
 }
 
 bool DataUseUITabModel::RemoveTabEvent(SessionID::id_type tab_id,
                                        DataUseTrackingEvent event) {
   DCHECK(thread_checker_.CalledOnValidThread());
   TabEvents::iterator it = tab_events_.find(tab_id);
-  DCHECK(it != tab_events_.end());
+  if (it == tab_events_.end())
+    return false;
+
   if (it->second == event) {
     tab_events_.erase(it);
     return true;
   }
   return false;
 }
 
 bool DataUseUITabModel::ConvertTransitionType(
     ui::PageTransition page_transition,
     DataUseTabModel::TransitionType* transition_type) const {
@@ skipping 41 matching lines @@
       }
       return false;
     default:
       return false;
   }
 }
 
 }  // namespace android
 
 }  // namespace chrome