Added --custom-launcher-page. Adds a page to the experimental launcher.

This allows the user to specify a custom web page (which must be in the
chrome-extension:// scheme) which will appear as a third top-level page
in the experimental launcher, alongside the start and apps pages.

This command-line switch is intended to be temporary; eventually,
extensions will be able to specify their own custom launcher pages. For
now, the command-line switch is sufficient for testing.

Most of the Chrome APIs are not yet available for these pages.

BUG=386004
TBR=mukai@chromium.org,jamescook@chromium.org

Review URL: https://codereview.chromium.org/352033002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@279685 0039d316-1c4b-4281-b951-d872f2087c98

11 files changed, 76 insertions, 0 deletions

diff --git a/ash/shell/app_list.cc b/ash/shell/app_list.cc
index df277d0..e396848 100644
--- a/ash/shell/app_list.cc
+++ b/ash/shell/app_list.cc
@@ -354,6 +354,10 @@ class ExampleAppListViewDelegate : public app_list::AppListViewDelegate {
     return NULL;
   }
 
+  virtual views::View* CreateCustomPageWebView(const gfx::Size& size) OVERRIDE {
+    return NULL;
+  }
+
   virtual bool IsSpeechRecognitionEnabled() OVERRIDE {
     return false;
   }
diff --git a/athena/home/app_list_view_delegate.cc b/athena/home/app_list_view_delegate.cc
index 2bd79ae..2938bf7 100644
--- a/athena/home/app_list_view_delegate.cc
+++ b/athena/home/app_list_view_delegate.cc
@@ -155,6 +155,11 @@ views::View* AppListViewDelegate::CreateStartPageWebView(
   return NULL;
 }
 
+views::View* AppListViewDelegate::CreateCustomPageWebView(
+    const gfx::Size& size) {
+  return NULL;
+}
+
 bool AppListViewDelegate::IsSpeechRecognitionEnabled() {
   return false;
 }
diff --git a/athena/home/app_list_view_delegate.h b/athena/home/app_list_view_delegate.h
index 752eb78..76c06aa 100644
--- a/athena/home/app_list_view_delegate.h
+++ b/athena/home/app_list_view_delegate.h
@@ -55,6 +55,7 @@ class AppListViewDelegate : public app_list::AppListViewDelegate {
   virtual void ShowForProfileByPath(
       const base::FilePath& profile_path) OVERRIDE;
   virtual views::View* CreateStartPageWebView(const gfx::Size& size) OVERRIDE;
+  virtual views::View* CreateCustomPageWebView(const gfx::Size& size) OVERRIDE;
   virtual bool IsSpeechRecognitionEnabled() OVERRIDE;
   virtual const Users& GetUsers() const OVERRIDE;
   virtual bool ShouldCenterWindow() const OVERRIDE;
diff --git a/chrome/browser/ui/app_list/app_list_view_delegate.cc b/chrome/browser/ui/app_list/app_list_view_delegate.cc
index 2195fe6..7af49bd 100644
--- a/chrome/browser/ui/app_list/app_list_view_delegate.cc
+++ b/chrome/browser/ui/app_list/app_list_view_delegate.cc
@@ -7,6 +7,7 @@
 #include <vector>
 
 #include "base/callback.h"
+#include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/metrics/user_metrics.h"
 #include "base/stl_util.h"
@@ -27,19 +28,23 @@
 #include "chrome/browser/ui/host_desktop.h"
 #include "chrome/browser/ui/scoped_tabbed_browser_displayer.h"
 #include "chrome/browser/web_applications/web_app.h"
+#include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/url_constants.h"
 #include "components/signin/core/browser/signin_manager.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/page_navigator.h"
 #include "content/public/browser/user_metrics.h"
+#include "content/public/browser/web_contents.h"
 #include "extensions/browser/extension_registry.h"
+#include "extensions/common/constants.h"
 #include "grit/theme_resources.h"
 #include "ui/app_list/app_list_switches.h"
 #include "ui/app_list/app_list_view_delegate_observer.h"
 #include "ui/app_list/search_box_model.h"
 #include "ui/app_list/speech_ui_model.h"
 #include "ui/base/resource/resource_bundle.h"
+#include "ui/views/controls/webview/webview.h"
 
 #if defined(TOOLKIT_VIEWS)
 #include "ui/views/controls/webview/webview.h"
@@ -144,6 +149,28 @@ AppListViewDelegate::AppListViewDelegate(Profile* profile,
   OnProfileChanged();  // sets model_
   if (service)
     service->AddObserver(this);
+
+  // Set up the custom launcher page. There is currently only a single custom
+  // page allowed, which is specified as a command-line flag. In the future,
+  // arbitrary extensions may be able to specify their own custom pages.
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+  if (app_list::switches::IsExperimentalAppListEnabled() &&
+      command_line->HasSwitch(switches::kCustomLauncherPage)) {
+    GURL custom_launcher_page_url(
+        command_line->GetSwitchValueASCII(switches::kCustomLauncherPage));
+    if (!custom_launcher_page_url.SchemeIs(extensions::kExtensionScheme)) {
+      LOG(ERROR) << "Invalid custom launcher page URL: "
+                 << custom_launcher_page_url.possibly_invalid_spec();
+    } else {
+      content::WebContents::CreateParams params(profile_);
+      custom_page_web_contents_.reset(content::WebContents::Create(params));
+      custom_page_web_contents_->GetController().LoadURL(
+          custom_launcher_page_url,
+          content::Referrer(),
+          content::PAGE_TRANSITION_AUTO_TOPLEVEL,
+          std::string());
+    }
+  }
 }
 
 AppListViewDelegate::~AppListViewDelegate() {
@@ -451,6 +478,18 @@ views::View* AppListViewDelegate::CreateStartPageWebView(
   web_view->SetWebContents(web_contents);
   return web_view;
 }
+
+views::View* AppListViewDelegate::CreateCustomPageWebView(
+    const gfx::Size& size) {
+  if (!custom_page_web_contents_)
+    return NULL;
+
+  views::WebView* web_view = new views::WebView(
+      custom_page_web_contents_->GetBrowserContext());
+  web_view->SetPreferredSize(size);
+  web_view->SetWebContents(custom_page_web_contents_.get());
+  return web_view;
+}
 #endif
 
 bool AppListViewDelegate::IsSpeechRecognitionEnabled() {
diff --git a/chrome/browser/ui/app_list/app_list_view_delegate.h b/chrome/browser/ui/app_list/app_list_view_delegate.h
index b6df54d..b5dba63 100644
--- a/chrome/browser/ui/app_list/app_list_view_delegate.h
+++ b/chrome/browser/ui/app_list/app_list_view_delegate.h
@@ -32,6 +32,10 @@ namespace base {
 class FilePath;
 }
 
+namespace content {
+class WebContents;
+}
+
 namespace gfx {
 class ImageSkia;
 }
@@ -85,6 +89,7 @@ class AppListViewDelegate : public app_list::AppListViewDelegate,
       const base::FilePath& profile_path) OVERRIDE;
 #if defined(TOOLKIT_VIEWS)
   virtual views::View* CreateStartPageWebView(const gfx::Size& size) OVERRIDE;
+  virtual views::View* CreateCustomPageWebView(const gfx::Size& size) OVERRIDE;
 #endif
   virtual bool IsSpeechRecognitionEnabled() OVERRIDE;
   virtual const Users& GetUsers() const OVERRIDE;
@@ -149,6 +154,9 @@ class AppListViewDelegate : public app_list::AppListViewDelegate,
   // this instance can be removed as an observer on its destruction.
   ScopedObserver<SigninManagerBase, AppListViewDelegate> scoped_observer_;
 
+  // Contents of the additional custom launcher page. May be NULL.
+  scoped_ptr<content::WebContents> custom_page_web_contents_;
+
   DISALLOW_COPY_AND_ASSIGN(AppListViewDelegate);
 };
 
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 3a12539..34c8398 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -189,6 +189,10 @@ const char kCrashOnHangThreads[]            = "crash-on-hang-threads";
 const char kCreateBrowserOnStartupForTests[] =
     "create-browser-on-startup-for-tests";
 
+// Specifies the chrome-extension:// URL for the contents of an additional page
+// added to the experimental app launcher.
+const char kCustomLauncherPage[]            = "custom-launcher-page";
+
 // Enables a frame context menu item that toggles the frame in and out of glass
 // mode (Windows Vista and up only).
 const char kDebugEnableFrameToggle[]        = "debug-enable-frame-toggle";
diff --git a/chrome/common/chrome_switches.h b/chrome/common/chrome_switches.h
index 53c2a9f..6e4b1c9 100644
--- a/chrome/common/chrome_switches.h
+++ b/chrome/common/chrome_switches.h
@@ -63,6 +63,7 @@ extern const char kCloudPrintSetupProxy[];
 extern const char kComponentUpdater[];
 extern const char kCrashOnHangThreads[];
 extern const char kCreateBrowserOnStartupForTests[];
+extern const char kCustomLauncherPage[];
 extern const char kDebugEnableFrameToggle[];
 extern const char kDebugPackedApps[];
 extern const char kDiagnostics[];
diff --git a/ui/app_list/app_list_view_delegate.h b/ui/app_list/app_list_view_delegate.h
index cf6fa53..606e218 100644
--- a/ui/app_list/app_list_view_delegate.h
+++ b/ui/app_list/app_list_view_delegate.h
@@ -139,6 +139,10 @@ class APP_LIST_EXPORT AppListViewDelegate {
   // Creates the web view for the start page. The caller takes the ownership of
   // the returned view.
   virtual views::View* CreateStartPageWebView(const gfx::Size& size) = 0;
+
+  // Creates the web view for the user-specified custom page. May return NULL.
+  // The caller takes ownership of the returned view.
+  virtual views::View* CreateCustomPageWebView(const gfx::Size& size) = 0;
 #endif
 
   // Returns true if the delegate supports speech recognition.
diff --git a/ui/app_list/test/app_list_test_view_delegate.cc b/ui/app_list/test/app_list_test_view_delegate.cc
index e1380b6..e4044b4 100644
--- a/ui/app_list/test/app_list_test_view_delegate.cc
+++ b/ui/app_list/test/app_list_test_view_delegate.cc
@@ -96,6 +96,10 @@ views::View* AppListTestViewDelegate::CreateStartPageWebView(
     const gfx::Size& size) {
   return NULL;
 }
+views::View* AppListTestViewDelegate::CreateCustomPageWebView(
+    const gfx::Size& size) {
+  return NULL;
+}
 #endif
 
 bool AppListTestViewDelegate::IsSpeechRecognitionEnabled() {
diff --git a/ui/app_list/test/app_list_test_view_delegate.h b/ui/app_list/test/app_list_test_view_delegate.h
index 698496c..acf7130 100644
--- a/ui/app_list/test/app_list_test_view_delegate.h
+++ b/ui/app_list/test/app_list_test_view_delegate.h
@@ -77,6 +77,7 @@ class AppListTestViewDelegate : public AppListViewDelegate {
       const base::FilePath& profile_path) OVERRIDE {}
 #if defined(TOOLKIT_VIEWS)
   virtual views::View* CreateStartPageWebView(const gfx::Size& size) OVERRIDE;
+  virtual views::View* CreateCustomPageWebView(const gfx::Size& size) OVERRIDE;
 #endif
   virtual bool IsSpeechRecognitionEnabled() OVERRIDE;
   virtual const Users& GetUsers() const OVERRIDE;
diff --git a/ui/app_list/views/contents_view.cc b/ui/app_list/views/contents_view.cc
index 1b4e124..3dc588e 100644
--- a/ui/app_list/views/contents_view.cc
+++ b/ui/app_list/views/contents_view.cc
@@ -53,6 +53,11 @@ void ContentsView::InitNamedPages(AppListModel* model,
   DCHECK(model);
 
   if (app_list::switches::IsExperimentalAppListEnabled()) {
+    views::View* custom_page_view =
+        view_delegate->CreateCustomPageWebView(GetLocalBounds().size());
+    if (custom_page_view)
+      AddLauncherPage(custom_page_view, IDR_APP_LIST_NOTIFICATIONS_ICON);
+
     start_page_view_ = new StartPageView(app_list_main_view_, view_delegate);
     AddLauncherPage(
         start_page_view_, IDR_APP_LIST_SEARCH_ICON, NAMED_PAGE_START);