Draggable peeking/fullscreen launcher with transparent background.

ui/app_list/views/start_page_view.cc

Index: ui/app_list/views/start_page_view.cc
diff --git a/ui/app_list/views/start_page_view.cc b/ui/app_list/views/start_page_view.cc
index b41a9ffa2adf091ece93b7022b5e30577f9f7c79..86add99eef8ecdfcf23b9a26be6a20de91548818 100644
--- a/ui/app_list/views/start_page_view.cc
+++ b/ui/app_list/views/start_page_view.cc
@@ -13,8 +13,10 @@
 #include "base/strings/utf_string_conversions.h"
 #include "ui/accessibility/ax_node_data.h"
 #include "ui/app_list/app_list_constants.h"
+#include "ui/app_list/app_list_features.h"
 #include "ui/app_list/app_list_item.h"
 #include "ui/app_list/app_list_model.h"
+#include "ui/app_list/app_list_switches.h"
 #include "ui/app_list/app_list_view_delegate.h"
 #include "ui/app_list/search_result.h"
 #include "ui/app_list/views/all_apps_tile_item_view.h"
@@ -51,6 +53,7 @@ constexpr int kWebViewHeight = 224;
 constexpr int kTileSpacing = 7;
 constexpr int kNumStartPageTilesCols = 5;
 constexpr int kTilesHorizontalMarginLeft = 145;
+constexpr int kCenterColumnOfStartPageAppGrid = 3;
 
 constexpr int kLauncherPageBackgroundWidth = 400;
 
@@ -137,7 +140,10 @@ StartPageView::StartPageTilesContainer::StartPageTilesContainer(
       views::Background::CreateSolidBackground(kLabelBackgroundColor));
   all_apps_button_->SetHoverStyle(TileItemView::HOVER_STYLE_ANIMATE_SHADOW);
   all_apps_button_->SetParentBackgroundColor(kLabelBackgroundColor);
-  CreateAppsGrid(kNumStartPageTiles);
+
+  CreateAppsGrid(features::IsFullscreenAppListEnabled()
+                     ? kNumStartPageTilesFullscreen
+                     : kNumStartPageTiles);
 }
 
 StartPageView::StartPageTilesContainer::~StartPageTilesContainer() {
@@ -171,7 +177,10 @@ int StartPageView::StartPageTilesContainer::DoUpdate() {
       delete search_result_tile_views_[i];
     search_result_tile_views_.clear();
     RemoveChildView(all_apps_button_);
-    CreateAppsGrid(std::min(kNumStartPageTiles, display_results.size()));
+
+    CreateAppsGrid(features::IsFullscreenAppListEnabled()
+                       ? kNumStartPageTilesFullscreen
+                       : std::min(kNumStartPageTiles, display_results.size()));
   }
 
   // Update the tile item results.
@@ -242,10 +251,19 @@ void StartPageView::StartPageTilesContainer::CreateAppsGrid(int apps_num) {
     search_result_tile_views_.emplace_back(tile_item);
   }
 
-  // Also add a special "all apps" button to the end of the container.
   all_apps_button_->UpdateIcon();
-  if (i % kNumStartPageTilesCols == 0)
+  if (features::IsFullscreenAppListEnabled()) {
+    // Also add a special "all apps" button to the middle of the next row of the
+    // container.
     tiles_layout_manager->StartRow(0, 0);
+    tiles_layout_manager->SkipColumns(kCenterColumnOfStartPageAppGrid);
+  } else {
+    // Also add a special "all apps" button to the end of the next row of the
+    // container.
+    if (i % kNumStartPageTilesCols == 0)
+      tiles_layout_manager->StartRow(0, 0);
+  }
+
   tiles_layout_manager->AddView(all_apps_button_);
   AddChildView(all_apps_button_);
 }
@@ -253,7 +271,8 @@ void StartPageView::StartPageTilesContainer::CreateAppsGrid(int apps_num) {
 ////////////////////////////////////////////////////////////////////////////////
 // StartPageView implementation:
 StartPageView::StartPageView(AppListMainView* app_list_main_view,
-                             AppListViewDelegate* view_delegate)
+                             AppListViewDelegate* view_delegate,
+                             AppListView* app_list_view)
     : app_list_main_view_(app_list_main_view),
       view_delegate_(view_delegate),
       search_box_spacer_view_(new View()),
@@ -262,7 +281,8 @@ StartPageView::StartPageView(AppListMainView* app_list_main_view,
           view_delegate_->GetModel()->custom_launcher_page_name())),
       tiles_container_(new StartPageTilesContainer(
           app_list_main_view->contents_view(),
-          new AllAppsTileItemView(app_list_main_view_->contents_view()),
+          new AllAppsTileItemView(app_list_main_view_->contents_view(),
+                                  app_list_view),
           view_delegate)) {
   search_box_spacer_view_->SetPreferredSize(gfx::Size(
       kStartPageSearchBoxWidth,
@@ -274,7 +294,6 @@ StartPageView::StartPageView(AppListMainView* app_list_main_view,
 
   // The view containing the start page tiles.
   AddChildView(tiles_container_);
-
   AddChildView(custom_launcher_page_background_);
 
   tiles_container_->SetResults(view_delegate_->GetModel()->results());
@@ -294,11 +313,16 @@ void StartPageView::InitInstantContainer() {
       views::BoxLayout::CROSS_AXIS_ALIGNMENT_CENTER);
   instant_container_->SetLayoutManager(instant_layout_manager);
 
-  views::View* web_view = view_delegate_->CreateStartPageWebView(
-      gfx::Size(kWebViewWidth, kWebViewHeight));
-  if (web_view) {
-    web_view->SetFocusBehavior(FocusBehavior::NEVER);
-    instant_container_->AddChildView(web_view);
+  // Create the view for the Google Doodle if the fullscreen launcher is not
+  // enabled.
+  if (!features::IsFullscreenAppListEnabled()) {
+    views::View* web_view = view_delegate_->CreateStartPageWebView(
+        gfx::Size(kWebViewWidth, kWebViewHeight));
+
+    if (web_view) {
+      web_view->SetFocusBehavior(FocusBehavior::NEVER);
+      instant_container_->AddChildView(web_view);
+    }
   }
 
   instant_container_->AddChildView(search_box_spacer_view_);