Chrome Frame turndown prompt.

chrome_frame/turndown_prompt/turndown_prompt.cc

+// 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 "chrome_frame/turndown_prompt/turndown_prompt.h"
+
+#include <atlbase.h>
+#include <shlguid.h>
+
+#include "base/bind.h"
+#include "base/compiler_specific.h"
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/path_service.h"
+#include "base/process_util.h"
+#include "base/win/scoped_bstr.h"
+#include "base/win/scoped_comptr.h"
+#include "base/win/win_util.h"
+#include "chrome/installer/util/browser_distribution.h"
+#include "chrome/installer/util/google_update_settings.h"
+#include "chrome/installer/util/install_util.h"
+#include "chrome/installer/util/installation_state.h"
+#include "chrome/installer/util/util_constants.h"
+#include "chrome_frame/infobars/infobar_manager.h"
+#include "chrome_frame/policy_settings.h"
+#include "chrome_frame/ready_mode/internal/ready_mode_web_browser_adapter.h"
+#include "chrome_frame/ready_mode/internal/url_launcher.h"
+#include "chrome_frame/simple_resource_loader.h"
+#include "chrome_frame/turndown_prompt/reshow_state.h"
+#include "chrome_frame/turndown_prompt/turndown_prompt_content.h"
+#include "chrome_frame/utils.h"
+#include "grit/chromium_strings.h"
+#include "net/base/registry_controlled_domains/registry_controlled_domain.h"
+
+namespace {
+
+// Time between showings of the turndown prompt.
+const int kTurndownPromptReshowDeltaMinutes = 60 * 24 * 7;
+
+void OnUninstallClicked(UrlLauncher* url_launcher);
+
+// Manages the Turndown UI in response to browsing ChromeFrame-rendered
+// pages.
+class BrowserObserver : public ReadyModeWebBrowserAdapter::Observer {
+ public:
+  BrowserObserver(IWebBrowser2* web_browser,
+                  ReadyModeWebBrowserAdapter* adapter);
+
+  // ReadyModeWebBrowserAdapter::Observer implementation
+  virtual void OnNavigateTo(const string16& url);
+  virtual void OnRenderInChromeFrame(const string16& url);
+  virtual void OnRenderInHost(const string16& url);
+
+ private:
+  // Shows the turndown prompt if it hasn't been seen since
+  // kTurndownPromptReshowDeltaMinutes.
+  void ShowPrompt();
+  void Hide();
+  // Returns a self-managed pointer that is not guaranteed to survive handling
+  // of Windows events. For safety's sake, retrieve this pointer for each use
+  // and do not store it for use outside of scope.
+  InfobarManager* GetInfobarManager();
+
+  GURL rendered_url_;
+  base::win::ScopedComPtr<IWebBrowser2> web_browser_;
+  ReadyModeWebBrowserAdapter* adapter_;
+
+  DISALLOW_COPY_AND_ASSIGN(BrowserObserver);
+};
+
+// Implements launching of a URL in an instance of IWebBrowser2.
+class UrlLauncherImpl : public UrlLauncher {
+ public:
+  explicit UrlLauncherImpl(IWebBrowser2* web_browser);
+
+  // UrlLauncher implementation
+  void LaunchUrl(const string16& url);
+
+ private:
+  base::win::ScopedComPtr<IWebBrowser2> web_browser_;
+};
+
+UrlLauncherImpl::UrlLauncherImpl(IWebBrowser2* web_browser) {
+  DCHECK(web_browser);
+  web_browser_ = web_browser;
+}
+
+void UrlLauncherImpl::LaunchUrl(const string16& url) {
+  VARIANT flags = { VT_I4 };
+  V_I4(&flags) = navOpenInNewWindow;
+  base::win::ScopedBstr location(url.c_str());
+
+  HRESULT hr = web_browser_->Navigate(location, &flags, NULL, NULL, NULL);
+  DLOG_IF(ERROR, FAILED(hr)) << "Failed to invoke Navigate on IWebBrowser2. "
+                             << "Error: " << hr;
+}
+
+BrowserObserver::BrowserObserver(IWebBrowser2* web_browser,
+                                 ReadyModeWebBrowserAdapter* adapter)
+    : web_browser_(web_browser),
+      adapter_(adapter) {
+}
+
+void BrowserObserver::OnNavigateTo(const string16& url) {
+  if (!net::registry_controlled_domains::SameDomainOrHost(
+          GURL(url),
+          rendered_url_,
+          net::registry_controlled_domains::EXCLUDE_PRIVATE_REGISTRIES)) {
+    rendered_url_ = GURL();
+    Hide();
+  }
+}
+
+void BrowserObserver::OnRenderInChromeFrame(const string16& url) {
+  ShowPrompt();
+  rendered_url_ = GURL(url);
+}
+
+void BrowserObserver::OnRenderInHost(const string16& url) {
+  Hide();
+  rendered_url_ = GURL(url);
+}
+
+void BrowserObserver::ShowPrompt() {
+  turndown_prompt::ReshowState reshow_state(
+      base::TimeDelta::FromMinutes(kTurndownPromptReshowDeltaMinutes));
+
+  // Short-circuit if the prompt shouldn't be shown again yet.
+  if (!reshow_state.HasReshowDeltaExpired(base::Time::Now()))
+    return;
+
+  // This pointer is self-managed and not guaranteed to survive handling of
+  // Windows events. For safety's sake, retrieve this pointer for each use and
+  // do not store it for use outside of scope.
+  InfobarManager* infobar_manager = GetInfobarManager();
+
+  if (infobar_manager) {
+    // Owned by infobar_content
+    scoped_ptr<UrlLauncher> url_launcher(new UrlLauncherImpl(web_browser_));
+
+    // Owned by infobar_manager
+    scoped_ptr<InfobarContent> infobar_content(new TurndownPromptContent(
+        url_launcher.release(),
+        base::Bind(&OnUninstallClicked,
+                   base::Owned(new UrlLauncherImpl(web_browser_)))));
+
+    if (infobar_manager->Show(infobar_content.release(), TOP_INFOBAR)) {
+      // Update state in the registry that the prompt was shown.
+      reshow_state.MarkShown(base::Time::Now());
+    }
+  }
+}
+
+void BrowserObserver::Hide() {
+  InfobarManager* infobar_manager = GetInfobarManager();
+  if (infobar_manager)
+    infobar_manager->HideAll();
+}
+
+InfobarManager* BrowserObserver::GetInfobarManager() {
+  HRESULT hr = NOERROR;
+
+  base::win::ScopedComPtr<IOleWindow> ole_window;
+  hr = DoQueryService(SID_SShellBrowser, web_browser_, ole_window.Receive());
+  if (FAILED(hr) || ole_window == NULL) {
+    DLOG(ERROR) << "Failed to query SID_SShellBrowser from IWebBrowser2. "
+                << "Error: " << hr;
+    return NULL;
+  }
+
+  HWND web_browser_hwnd = NULL;
+  hr = ole_window->GetWindow(&web_browser_hwnd);
+  if (FAILED(hr) || web_browser_hwnd == NULL) {
+    DLOG(ERROR) << "Failed to query HWND from IOleWindow. "
+                << "Error: " << hr;
+    return NULL;
+  }
+
+  return InfobarManager::Get(web_browser_hwnd);
+}
+
+// Returns true if the module into which this code is linked is installed at
+// system-level.
+bool IsCurrentModuleSystemLevel() {
+  base::FilePath dll_path;
+  if (PathService::Get(base::DIR_MODULE, &dll_path))
+    return !InstallUtil::IsPerUserInstall(dll_path.value().c_str());
+  return false;
+}
+
+// Attempts to create a ReadyModeWebBrowserAdapter instance.
+bool CreateWebBrowserAdapter(ReadyModeWebBrowserAdapter** adapter) {
+  *adapter = NULL;
+
+  CComObject<ReadyModeWebBrowserAdapter>* com_object;
+  HRESULT hr =
+      CComObject<ReadyModeWebBrowserAdapter>::CreateInstance(&com_object);
+
+  if (FAILED(hr)) {
+    DLOG(ERROR) << "Failed to create instance of ReadyModeWebBrowserAdapter. "
+                << "Error: " << hr;
+    return false;
+  }
+
+  com_object->AddRef();
+  *adapter = com_object;
+  return true;
+}
+
+// Attempts to install Turndown prompts in the provided web browser.
+bool InstallPrompts(IWebBrowser2* web_browser) {
+  base::win::ScopedComPtr<ReadyModeWebBrowserAdapter, NULL> adapter;
+
+  if (!CreateWebBrowserAdapter(adapter.Receive()))
+    return false;
+
+  // Pass ownership of our delegate to the BrowserObserver
+  scoped_ptr<ReadyModeWebBrowserAdapter::Observer> browser_observer(
+      new BrowserObserver(web_browser, adapter));
+
+  // Owns the BrowserObserver
+  return adapter->Initialize(web_browser, browser_observer.release());
+}
+
+// Launches the Chrome Frame uninstaller in response to user action. This
+// implementation should not be used to uninstall MSI-based versions of GCF,
+// since those must be removed by way of Windows Installer machinery.
+void LaunchChromeFrameUninstaller() {
+  BrowserDistribution* dist =
+      BrowserDistribution::GetSpecificDistribution(
+          BrowserDistribution::CHROME_FRAME);
+  const bool system_level = IsCurrentModuleSystemLevel();
+  installer::ProductState product_state;
+  if (!product_state.Initialize(system_level, dist)) {
+    DLOG(ERROR) << "Chrome frame isn't installed at "
+                << (system_level ? "system" : "user") << " level.";
+    return;
+  }
+
+  CommandLine uninstall_command(product_state.uninstall_command());
+  if (uninstall_command.GetProgram().empty()) {
+    DLOG(ERROR) << "No uninstall command found in registry.";
+    return;
+  }
+
+  // Force Uninstall silences the prompt to reboot to complete uninstall.
+  uninstall_command.AppendSwitch(installer::switches::kForceUninstall);
+  VLOG(1) << "Uninstalling Chrome Frame with command: "
+          << uninstall_command.GetCommandLineString();
+  base::LaunchProcess(uninstall_command, base::LaunchOptions(), NULL);
+}
+
+void LaunchLearnMoreURL(UrlLauncher* url_launcher) {
+  url_launcher->LaunchUrl(SimpleResourceLoader::Get(
+      IDS_CHROME_FRAME_TURNDOWN_LEARN_MORE_URL));
+}
+
+void OnUninstallClicked(UrlLauncher* url_launcher) {
+  LaunchChromeFrameUninstaller();
+  LaunchLearnMoreURL(url_launcher);
+}
+
+}  // namespace
+
+namespace turndown_prompt {
+
+bool IsPromptSuppressed() {
+  // See if this is an MSI install of GCF or if updates have been disabled.
+  BrowserDistribution* dist =
+      BrowserDistribution::GetSpecificDistribution(
+          BrowserDistribution::CHROME_FRAME);
+
+  const bool system_level = IsCurrentModuleSystemLevel();
+  bool multi_install = false;
+
+  installer::ProductState product_state;
+  if (product_state.Initialize(system_level, dist)) {
+    if (product_state.is_msi())
+      return true;
+    multi_install = product_state.is_multi_install();
+  }
+
+  if (multi_install) {
+    dist =
+        BrowserDistribution::GetSpecificDistribution(
+            BrowserDistribution::CHROME_BINARIES);
+  }
+  if (GoogleUpdateSettings::GetAppUpdatePolicy(dist->GetAppGuid(), NULL) ==
+      GoogleUpdateSettings::UPDATES_DISABLED) {
+    return true;
+  }
+
+  // See if the prompt is explicitly suppressed via GP.
+  return PolicySettings::GetInstance()->suppress_turndown_prompt();
+}
+
+void Configure(IWebBrowser2* web_browser) {
+  if (!IsPromptSuppressed())
+    InstallPrompts(web_browser);
+}
+
+}  // namespace turndown_prompt