Settings Overides -- warn user when extensions override their NTP.

chrome/browser/extensions/ntp_controlled_bubble_controller.cc

+// Copyright (c) 2014 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/extensions/ntp_controlled_bubble_controller.h"
+
+#include "base/metrics/histogram.h"
+#include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/url_constants.h"
+#include "extensions/browser/extension_registry.h"
+#include "extensions/browser/extension_system.h"
+#include "grit/generated_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+
+using extensions::ExtensionMessageBubbleController;
+using extensions::NtpControlledBubbleController;
+
+namespace {
+
+////////////////////////////////////////////////////////////////////////////////
+// NtpControlledBubbleDelegate
+
+class NtpControlledBubbleDelegate
+    : public extensions::ExtensionMessageBubbleController::Delegate {
+ public:
+  NtpControlledBubbleDelegate(ExtensionService* service, Profile* profile);
+  virtual ~NtpControlledBubbleDelegate();
+
+  // ExtensionMessageBubbleController::Delegate methods.
+  virtual bool ShouldIncludeExtension(const std::string& extension_id) OVERRIDE;
+  virtual void AcknowledgeExtension(
+      const std::string& extension_id,
+      extensions::ExtensionMessageBubbleController::BubbleAction
+          user_action) OVERRIDE;
+  virtual void PerformAction(const extensions::ExtensionIdList& list) OVERRIDE;
+  virtual base::string16 GetTitle() const OVERRIDE;
+  virtual base::string16 GetMessageBody() const OVERRIDE;
+  virtual base::string16 GetOverflowText(
+      const base::string16& overflow_count) const OVERRIDE;
+  virtual base::string16 GetLearnMoreLabel() const OVERRIDE;
+  virtual GURL GetLearnMoreUrl() const OVERRIDE;
+  virtual base::string16 GetActionButtonLabel() const OVERRIDE;
+  virtual base::string16 GetDismissButtonLabel() const OVERRIDE;
+  virtual bool ShouldShowExtensionList() const OVERRIDE;
+  virtual void RestrictToSingleExtension(
+      const std::string& extension_id) OVERRIDE;
+  virtual void LogExtensionCount(size_t count) OVERRIDE;
+  virtual void LogAction(
+      extensions::ExtensionMessageBubbleController::BubbleAction
+          action) OVERRIDE;
+
+ private:
+  // Our extension service. Weak, not owned by us.
+  ExtensionService* service_;
+
+  // A weak pointer to the profile we are associated with. Not owned by us.
+  Profile* profile_;
+
+  // The ID of the extension we are showing the bubble for.
+  std::string extension_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(NtpControlledBubbleDelegate);
+};
+
+NtpControlledBubbleDelegate::NtpControlledBubbleDelegate(
+    ExtensionService* service,
+    Profile* profile)
+    : service_(service), profile_(profile) {}
+
+NtpControlledBubbleDelegate::~NtpControlledBubbleDelegate() {}
+
+bool NtpControlledBubbleDelegate::ShouldIncludeExtension(
+    const std::string& extension_id) {
+  if (!extension_id_.empty() && extension_id_ != extension_id)
+    return false;
+
+  using extensions::ExtensionRegistry;
+  ExtensionRegistry* registry = ExtensionRegistry::Get(profile_);
+  const extensions::Extension* extension =
+      registry->GetExtensionById(extension_id, ExtensionRegistry::ENABLED);
+  if (!extension)
+    return false;  // The extension provided is no longer enabled.
+
+  extensions::ExtensionPrefs* prefs = extensions::ExtensionPrefs::Get(profile_);
+  if (prefs->HasNtpControlledBubbleBeenAcknowledged(extension_id))
+    return false;
+
+  return true;
+}
+
+void NtpControlledBubbleDelegate::AcknowledgeExtension(
+    const std::string& extension_id,
+    ExtensionMessageBubbleController::BubbleAction user_action) {
+  if (user_action != ExtensionMessageBubbleController::ACTION_EXECUTE) {
+    extensions::ExtensionPrefs* prefs =
+        extensions::ExtensionPrefs::Get(profile_);
+    prefs->SetNtpControlledBubbleBeenAcknowledged(extension_id, true);
+  }
+}
+
+void NtpControlledBubbleDelegate::PerformAction(
+    const extensions::ExtensionIdList& list) {
+  for (size_t i = 0; i < list.size(); ++i) {
+    service_->DisableExtension(list[i],
+                               extensions::Extension::DISABLE_USER_ACTION);
+  }
+}
+
+base::string16 NtpControlledBubbleDelegate::GetTitle() const {
+  return l10n_util::GetStringUTF16(
+      IDS_EXTENSIONS_NTP_CONTROLLED_TITLE_HOME_PAGE_BUBBLE);
+}
+
+base::string16 NtpControlledBubbleDelegate::GetMessageBody() const {
+  base::string16 body =
+      l10n_util::GetStringUTF16(IDS_EXTENSIONS_NTP_CONTROLLED_FIRST_LINE);
+  body += l10n_util::GetStringUTF16(
+      IDS_EXTENSIONS_SETTINGS_API_THIRD_LINE_CONFIRMATION);
+  return body;
+}
+
+base::string16 NtpControlledBubbleDelegate::GetOverflowText(
+    const base::string16& overflow_count) const {
+  // Does not have more than one extension in the list at a time.
+  NOTREACHED();
+  return base::string16();
+}
+
+base::string16 NtpControlledBubbleDelegate::GetLearnMoreLabel() const {
+  return l10n_util::GetStringUTF16(IDS_LEARN_MORE);
+}
+
+GURL NtpControlledBubbleDelegate::GetLearnMoreUrl() const {
+  // TODO(finnur): Rename the const when things settle down (since it is used in
+  // more places than for the Settings API bubble now).
+  return GURL(chrome::kSettingsApiLearnMoreURL);
+}
+
+base::string16 NtpControlledBubbleDelegate::GetActionButtonLabel() const {
+  // TODO(finnur): Rename the const when things settle down (since it is used in
+  // more places than for the Settings API bubble now).
+  return l10n_util::GetStringUTF16(
+      IDS_EXTENSIONS_SETTINGS_API_RESTORE_SETTINGS);
+}
+
+base::string16 NtpControlledBubbleDelegate::GetDismissButtonLabel() const {
+  // TODO(finnur): Rename the const when things settle down (since it is used in
+  // more places than for the Settings API bubble now).
+  return l10n_util::GetStringUTF16(IDS_EXTENSIONS_SETTINGS_API_KEEP_CHANGES);
+}
+
+bool NtpControlledBubbleDelegate::ShouldShowExtensionList() const {
+  return false;
+}
+
+void NtpControlledBubbleDelegate::RestrictToSingleExtension(

[Yoyo Zhou, 2014/04/23 00:08:35]

Considering the lifetime of NtpControlledBubbleController, this seems like it
may be unnecessary.

+    const std::string& extension_id) {
+  extension_id_ = extension_id;
+}
+
+void NtpControlledBubbleDelegate::LogExtensionCount(size_t count) {
+  UMA_HISTOGRAM_COUNTS_100("NtpControlledBubble.ExtensionCount", count);
+}
+
+void NtpControlledBubbleDelegate::LogAction(
+    ExtensionMessageBubbleController::BubbleAction action) {
+  UMA_HISTOGRAM_ENUMERATION("NtpControlledBubble.UserSelection",
+                            action,
+                            ExtensionMessageBubbleController::ACTION_BOUNDARY);
+}
+
+}  // namespace
+
+namespace extensions {
+
+////////////////////////////////////////////////////////////////////////////////
+// NtpControlledBubbleController
+
+NtpControlledBubbleController::NtpControlledBubbleController(Profile* profile)
+    : ExtensionMessageBubbleController(
+          new NtpControlledBubbleDelegate(
+              ExtensionSystem::Get(profile)->extension_service(),
+              profile),
+          profile),
+      profile_(profile) {}
+
+NtpControlledBubbleController::~NtpControlledBubbleController() {}
+
+bool NtpControlledBubbleController::ShouldShow(
+    const std::string& extension_id) {
+  if (!delegate()->ShouldIncludeExtension(extension_id))
+    return false;
+
+  delegate()->RestrictToSingleExtension(extension_id);
+  return true;
+}
+
+bool NtpControlledBubbleController::CloseOnDeactivate() {
+  return true;
+}
+
+}  // namespace extensions