Added notion of currently active app / browser

chrome/browser/ui/views/ash/launcher/launcher_updater.cc

Index: chrome/browser/ui/views/ash/launcher/launcher_updater.cc
diff --git a/chrome/browser/ui/views/ash/launcher/launcher_updater.cc b/chrome/browser/ui/views/ash/launcher/launcher_updater.cc
index e6c428de934e1f40aa57f402f754b7792e9b1321..dc526a8646ef2e09ff2f05bdfc3aca88b8ddb3e6 100644
--- a/chrome/browser/ui/views/ash/launcher/launcher_updater.cc
+++ b/chrome/browser/ui/views/ash/launcher/launcher_updater.cc
@@ -63,8 +63,11 @@ void LauncherUpdater::Init() {
     ChromeLauncherDelegate::AppType app_type =
         type_ == TYPE_PANEL ? ChromeLauncherDelegate::APP_TYPE_PANEL
         : ChromeLauncherDelegate::APP_TYPE_WINDOW;
+    ash::LauncherItemStatus app_status =
+        ash::wm::IsActiveWindow(window_) ?
+            ash::STATUS_ACTIVE : ash::STATUS_RUNNING;
     item_id_ = launcher_delegate_->CreateAppLauncherItem(
-        this, app_id_, app_type, ash::STATUS_RUNNING);
+        this, app_id_, app_type, app_status);
   } else {
     // Determine if we have any tabs that should get launcher items.
     std::vector<TabContentsWrapper*> app_tabs;
@@ -81,7 +84,9 @@ void LauncherUpdater::Init() {
     for (size_t i = 0; i < app_tabs.size(); ++i)
       AddAppItem(app_tabs[i]);
   }
-  UpdateLauncher(tab_model_->GetActiveTabContents());
+  // In testing scenarios we can get tab strips with no active contents.
+  if (tab_model_->GetActiveTabContents())
+    UpdateLauncher(tab_model_->GetActiveTabContents());
 }
 
 // static
@@ -112,10 +117,25 @@ TabContentsWrapper* LauncherUpdater::GetTab(ash::LauncherID id) {
   return NULL;
 }
 
+void LauncherUpdater::BrowserActivationStateChanged() {
+  launcher_delegate_->SetItemStatus(
+      GetLauncherID(tab_model_->GetActiveTabContents()),
+      ash::wm::IsActiveWindow(window_) ?
+          ash::STATUS_ACTIVE : ash::STATUS_RUNNING);
+}
+
 void LauncherUpdater::ActiveTabChanged(TabContentsWrapper* old_contents,
                                        TabContentsWrapper* new_contents,
                                        int index,
                                        bool user_gesture) {
+  if (ash::wm::IsActiveWindow(window_)) {
+    ash::LauncherID old_id = GetLauncherID(old_contents);
+    ash::LauncherID new_id = GetLauncherID(new_contents);
+
+    // The new_contents state will be handled in UpdateLauncher().
+    if (old_id != new_id && old_id >= 0)
+      launcher_delegate_->SetItemStatus(old_id, ash::STATUS_RUNNING);
+  }
   // Update immediately on a tab change.
   UpdateLauncher(new_contents);
 }
@@ -205,12 +225,14 @@ void LauncherUpdater::FaviconUpdated() {
 }
 
 void LauncherUpdater::UpdateLauncher(TabContentsWrapper* tab) {
-  if (type_ == TYPE_APP)
-    return;  // TYPE_APP is entirely maintained by ChromeLauncherDelegate.
-
   if (!tab)
     return;  // Assume the window is going to be closed if there are no tabs.
 
+  launcher_delegate_->SetItemStatus(GetLauncherID(tab), GetStatusForTab(tab));
+
+  if (type_ == TYPE_APP)
+    return;  // TYPE_APP is entirely maintained by ChromeLauncherDelegate.
+
   int item_index = launcher_model()->ItemIndexByID(item_id_);
   if (item_index == -1)
     return;
@@ -318,7 +340,7 @@ void LauncherUpdater::UpdateAppTabState(TabContentsWrapper* tab,
             launcher_delegate_->GetAppID(tab),
             ChromeLauncherDelegate::APP_TYPE_TAB);
         RegisterAppItem(item_id_, tab);
-        launcher_delegate_->SetItemStatus(item_id_, ash::STATUS_RUNNING);
+        launcher_delegate_->SetItemStatus(item_id_, GetStatusForTab(tab));
       }
       item_id_ = -1;
     } else {
@@ -328,11 +350,12 @@ void LauncherUpdater::UpdateAppTabState(TabContentsWrapper* tab,
 }
 
 void LauncherUpdater::AddAppItem(TabContentsWrapper* tab) {
+  ash::LauncherItemStatus status = GetStatusForTab(tab);
   ash::LauncherID id = launcher_delegate_->CreateAppLauncherItem(
       this,
       launcher_delegate_->GetAppID(tab),
       ChromeLauncherDelegate::APP_TYPE_TAB,
-      ash::STATUS_RUNNING);
+      status);
   RegisterAppItem(id, tab);
 }
 
@@ -365,6 +388,22 @@ bool LauncherUpdater::ContainsID(ash::LauncherID id, TabContentsWrapper** tab) {
   return false;
 }
 
+ash::LauncherID LauncherUpdater::GetLauncherID(TabContentsWrapper* tab) {
+  if (type_ == TYPE_APP || type_ == TYPE_PANEL)
+    return item_id_;
+  AppTabMap::iterator i = app_map_.find(tab);
+  if (i == app_map_.end())
+    return item_id_;
+  return i->second.id;
+}
+
+ash::LauncherItemStatus LauncherUpdater::GetStatusForTab(
+    TabContentsWrapper* tab) {
+  return ash::wm::IsActiveWindow(window_) &&
+      tab == tab_model_->GetActiveTabContents() ?
+        ash::STATUS_ACTIVE : ash::STATUS_RUNNING;
+}
+
 ash::LauncherModel* LauncherUpdater::launcher_model() {
   return launcher_delegate_->model();
 }