Draggable peeking/fullscreen launcher with transparent background.

ash/shelf/shelf_layout_manager.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 "ash/shelf/shelf_layout_manager.h"
 
 #include <algorithm>
 #include <cmath>
 #include <vector>
 
@@ skipping 10 matching lines @@
 #include "ash/shell.h"
 #include "ash/shell_port.h"
 #include "ash/system/status_area_widget.h"
 #include "ash/wm/fullscreen_window_finder.h"
 #include "ash/wm/mru_window_tracker.h"
 #include "ash/wm/screen_pinning_controller.h"
 #include "ash/wm/window_state.h"
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/i18n/rtl.h"
+#include "ui/app_list/app_list_features.h"
 #include "ui/base/ui_base_switches.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/layer_animation_observer.h"
 #include "ui/compositor/layer_animator.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
 #include "ui/display/display.h"
 #include "ui/display/screen.h"
 #include "ui/events/event.h"
 #include "ui/events/event_handler.h"
 #include "ui/keyboard/keyboard_controller.h"
@@ skipping 125 matching lines @@
 ShelfLayoutManager::~ShelfLayoutManager() {
   if (update_shelf_observer_)
     update_shelf_observer_->Detach();
 
   for (auto& observer : observers_)
     observer.WillDeleteShelfLayoutManager();
   Shell::Get()->RemoveShellObserver(this);
   ShellPort::Get()->RemoveLockStateObserver(this);
 }
 
+void ShelfLayoutManager::OnAppListIsActive() {
+  MaybeUpdateShelfBackground(AnimationChangeType::IMMEDIATE);
+}
+
 void ShelfLayoutManager::PrepareForShutdown() {
   in_shutdown_ = true;
   // Stop observing changes to avoid updating a partially destructed shelf.
   Shell::Get()->activation_client()->RemoveObserver(this);
 }
 
 bool ShelfLayoutManager::IsVisible() const {
   // status_area_widget() may be nullptr during the shutdown.
   return shelf_widget_->status_area_widget() &&
          shelf_widget_->status_area_widget()->IsVisible() &&
@@ skipping 275 matching lines @@
 }
 
 ShelfBackgroundType ShelfLayoutManager::GetShelfBackgroundType() const {
   if (state_.pre_lock_screen_animation_active)
     return SHELF_BACKGROUND_DEFAULT;
 
   // Handle all non active screen states, including OOBE and pre-login.
   if (state_.session_state != session_manager::SessionState::ACTIVE)
     return SHELF_BACKGROUND_OVERLAP;
 
+  // If the app list is active, hide the shelf background to prevent overlap.
+  if (shelf_widget_->IsShowingAppList() &&
+      app_list::features::IsFullscreenAppListEnabled())
+    return SHELF_BACKGROUND_DEFAULT;
+
   if (state_.visibility_state != SHELF_AUTO_HIDE &&
       state_.window_state == wm::WORKSPACE_WINDOW_STATE_MAXIMIZED) {
     return SHELF_BACKGROUND_MAXIMIZED;
   }
 
   if (gesture_drag_status_ == GESTURE_DRAG_IN_PROGRESS ||
       window_overlaps_shelf_ || state_.visibility_state == SHELF_AUTO_HIDE) {
     return SHELF_BACKGROUND_OVERLAP;
   }
 
@@ skipping 672 matching lines @@
   gesture_drag_status_ = GESTURE_DRAG_NONE;
 }
 
 void ShelfLayoutManager::CancelGestureDrag() {
   gesture_drag_status_ = GESTURE_DRAG_CANCEL_IN_PROGRESS;
   UpdateVisibilityState();
   gesture_drag_status_ = GESTURE_DRAG_NONE;
 }
 
 }  // namespace ash