1 files changed, 107 insertions, 0 deletions
diff --git a/apps/app_launcher.cc b/apps/app_launcher.cc
new file mode 100644
index 0000000..73011bc
--- /dev/null
+++ b/apps/app_launcher.cc
@@ -0,0 +1,107 @@
+// Copyright 2013 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 "apps/app_launcher.h"
+
+#include "apps/pref_names.h"
+#include "base/command_line.h"
+#include "base/prefs/pref_registry_simple.h"
+#include "base/prefs/pref_service.h"
+#include "base/threading/sequenced_worker_pool.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/common/chrome_switches.h"
+#include "content/public/browser/browser_thread.h"
+
+#if defined(OS_WIN)
+#include "chrome/installer/launcher_support/chrome_launcher_support.h"
+#include "chrome/installer/util/browser_distribution.h"
+#endif
+
+namespace apps {
+
+namespace {
+
+enum AppLauncherState {
+  APP_LAUNCHER_UNKNOWN,
+  APP_LAUNCHER_ENABLED,
+  APP_LAUNCHER_DISABLED,
+};
+
+AppLauncherState SynchronousAppLauncherChecks() {
+#if defined(USE_ASH)
+  return APP_LAUNCHER_ENABLED;
+#elif !defined(OS_WIN)
+  return APP_LAUNCHER_DISABLED;
+#else
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kShowAppListShortcut)) {
+    return APP_LAUNCHER_ENABLED;
+  }
+
+  if (!BrowserDistribution::GetDistribution()->AppHostIsSupported())
+    return APP_LAUNCHER_DISABLED;
+
+  return APP_LAUNCHER_UNKNOWN;
+#endif
+}
+
+#if defined(OS_WIN)
+void UpdatePrefAndCallCallbackOnUI(
+    bool result,
+    const OnAppLauncherEnabledCompleted& completion_callback) {
+  PrefService* prefs = g_browser_process->local_state();
+  prefs->SetBoolean(prefs::kAppLauncherIsEnabled, result);
+  completion_callback.Run(result);
+}
+
+void IsAppLauncherInstalledOnBlockingPool(
+    const OnAppLauncherEnabledCompleted& completion_callback) {
+  DCHECK(content::BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
+  bool result = chrome_launcher_support::IsAppLauncherPresent();
+  content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
+      base::Bind(UpdatePrefAndCallCallbackOnUI, result, completion_callback));
+}
+#endif
+
+}  // namespace
+
+bool MaybeIsAppLauncherEnabled() {
+  return SynchronousAppLauncherChecks() == APP_LAUNCHER_ENABLED;
+}
+
+void GetIsAppLauncherEnabled(
+    const OnAppLauncherEnabledCompleted& completion_callback) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+
+  AppLauncherState state = SynchronousAppLauncherChecks();
+
+  if (state != APP_LAUNCHER_UNKNOWN) {
+    bool is_enabled = state == APP_LAUNCHER_ENABLED;
+    PrefService* prefs = g_browser_process->local_state();
+    prefs->SetBoolean(prefs::kAppLauncherIsEnabled, is_enabled);
+    completion_callback.Run(is_enabled);
+    return;
+  }
+
+#if defined(OS_WIN)
+  content::BrowserThread::PostBlockingPoolTask(
+      FROM_HERE,
+      base::Bind(&IsAppLauncherInstalledOnBlockingPool,
+                 completion_callback));
+#else
+  // SynchronousAppLauncherChecks() never returns APP_LAUNCHER_UNKNOWN on
+  // !defined(OS_WIN), so this path is never reached.
+  NOTREACHED();
+#endif
+}
+
+bool WasAppLauncherEnabled() {
+  PrefService* prefs = g_browser_process->local_state();
+  // In some tests, the prefs aren't initialised.
+  if (!prefs)
+    return SynchronousAppLauncherChecks() == APP_LAUNCHER_ENABLED;
+  return prefs->GetBoolean(prefs::kAppLauncherIsEnabled);
+}
+
+}  // namespace apps