App List: Refactor ContentsSwitcherView so it doesn't hard-code pages.

ui/app_list/views/contents_view.cc

 // Copyright (c) 2012 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 "ui/app_list/views/contents_view.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
+#include "grit/ui_resources.h"
 #include "ui/app_list/app_list_constants.h"
 #include "ui/app_list/app_list_switches.h"
 #include "ui/app_list/app_list_view_delegate.h"
 #include "ui/app_list/views/app_list_folder_view.h"
 #include "ui/app_list/views/app_list_main_view.h"
 #include "ui/app_list/views/apps_container_view.h"
 #include "ui/app_list/views/apps_grid_view.h"
+#include "ui/app_list/views/contents_switcher_view.h"
 #include "ui/app_list/views/search_result_list_view.h"
 #include "ui/app_list/views/start_page_view.h"
+#include "ui/base/resource/resource_bundle.h"
 #include "ui/events/event.h"
 #include "ui/views/view_model.h"
 #include "ui/views/view_model_utils.h"
 
 namespace app_list {
 
 namespace {
 
 const int kMinMouseWheelToSwitchPage = 20;
 const int kMinScrollToSwitchPage = 20;
 const int kMinHorizVelocityToSwitchPage = 800;
 
 const double kFinishTransitionThreshold = 0.33;
 
 }  // namespace
 
 ContentsView::ContentsView(AppListMainView* app_list_main_view,
+                           ContentsSwitcherView* contents_switcher_view,
                            AppListModel* model,
                            AppListViewDelegate* view_delegate)
     : search_results_view_(NULL),
       start_page_view_(NULL),
       app_list_main_view_(app_list_main_view),
+      contents_switcher_view_(contents_switcher_view),
       view_model_(new views::ViewModel) {
   DCHECK(model);
 
   if (app_list::switches::IsExperimentalAppListEnabled()) {
     start_page_view_ = new StartPageView(app_list_main_view, view_delegate);
-    AddLauncherPage(start_page_view_, NAMED_PAGE_START);
+    AddLauncherPage(
+        start_page_view_, IDR_APP_LIST_SEARCH_ICON, NAMED_PAGE_START);
   } else {
     search_results_view_ =
         new SearchResultListView(app_list_main_view, view_delegate);
-    AddLauncherPage(search_results_view_, NAMED_PAGE_SEARCH_RESULTS);
+    AddLauncherPage(search_results_view_, 0, NAMED_PAGE_SEARCH_RESULTS);
     search_results_view_->SetResults(model->results());
   }
 
   apps_container_view_ = new AppsContainerView(app_list_main_view, model);
-  int apps_page_index = AddLauncherPage(apps_container_view_, NAMED_PAGE_APPS);
+  int apps_page_index = AddLauncherPage(
+      apps_container_view_, IDR_APP_LIST_APPS_ICON, NAMED_PAGE_APPS);
 
   pagination_model_.SelectPage(apps_page_index, false);
   pagination_model_.AddObserver(this);
 }
 
 ContentsView::~ContentsView() {
   pagination_model_.RemoveObserver(this);
 }
 
 void ContentsView::CancelDrag() {
@@ skipping 144 matching lines @@
   const int selected_page =
       std::max(0, GetAppsPaginationModel()->selected_page());
   apps_container_view_->apps_grid_view()->Prerender(selected_page);
 }
 
 views::View* ContentsView::GetPageView(int index) {
   return view_model_->view_at(index);
 }
 
 void ContentsView::AddBlankPageForTesting() {
-  AddLauncherPage(new views::View);
+  AddLauncherPage(new views::View, 0);
 }
 
-int ContentsView::AddLauncherPage(views::View* view) {
+int ContentsView::AddLauncherPage(views::View* view, int resource_id) {
   int page_index = view_model_->view_size();
   AddChildView(view);
   view_model_->Add(view, page_index);
   pagination_model_.SetTotalPages(view_model_->view_size());
+  if (contents_switcher_view_)
+    contents_switcher_view_->AddSwitcherButton(resource_id, page_index);
   return page_index;
 }
 
-int ContentsView::AddLauncherPage(views::View* view, NamedPage named_page) {
-  int page_index = AddLauncherPage(view);
+int ContentsView::AddLauncherPage(views::View* view,
+                                  int resource_id,
+                                  NamedPage named_page) {
+  int page_index = AddLauncherPage(view, resource_id);
   named_page_to_view_.insert(std::pair<NamedPage, int>(named_page, page_index));
   return page_index;
 }
 
 gfx::Size ContentsView::GetPreferredSize() const {
   const gfx::Size container_size =
       apps_container_view_->apps_grid_view()->GetPreferredSize();
   const gfx::Size results_size = search_results_view_
                                      ? search_results_view_->GetPreferredSize()
                                      : gfx::Size();
@@ skipping 111 matching lines @@
   if (std::abs(offset) > kMinScrollToSwitchPage) {
     if (!GetAppsPaginationModel()->has_transition()) {
       GetAppsPaginationModel()->SelectPageRelative(offset > 0 ? -1 : 1, true);
     }
     event->SetHandled();
     event->StopPropagation();
   }
 }
 
 }  // namespace app_list