Add ability to have active window autohide shelf

ash/common/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/common/shelf/shelf_layout_manager.h"
 
 #include <algorithm>
 #include <cmath>
 #include <vector>
 
 #include "ash/animation/animation_change_type.h"
 #include "ash/common/session/session_controller.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shelf/shelf_constants.h"
 #include "ash/common/shelf/shelf_layout_manager_observer.h"
 #include "ash/common/shelf/shelf_widget.h"
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/system/status_area_widget.h"
 #include "ash/common/wm/fullscreen_window_finder.h"
 #include "ash/common/wm/mru_window_tracker.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm/wm_screen_util.h"
 #include "ash/common/wm_lookup.h"
 #include "ash/common/wm_shell.h"
 #include "ash/common/wm_window.h"
 #include "ash/public/cpp/shell_window_ids.h"
 #include "ash/root_window_controller.h"
+#include "ash/shell.h"
+#include "ash/wm/window_state_aura.h"
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/i18n/rtl.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"
@@ skipping 201 matching lines @@
     return;
   if (state_.IsScreenLocked() || state_.IsAddingSecondaryUser()) {
     SetState(SHELF_VISIBLE);
   } else if (WmShell::Get()->IsPinned()) {
     SetState(SHELF_HIDDEN);
   } else {
     // TODO(zelidrag): Verify shelf drag animation still shows on the device
     // when we are in SHELF_AUTO_HIDE_ALWAYS_HIDDEN.
     wm::WorkspaceWindowState window_state(
         shelf_window->GetRootWindowController()->GetWorkspaceWindowState());
+
     switch (window_state) {
       case wm::WORKSPACE_WINDOW_STATE_FULL_SCREEN: {
-        if (IsShelfHiddenForFullscreen()) {
+        if (IsShelfAutoHideForFullscreenMaximized()) {
+          SetState(SHELF_AUTO_HIDE);
+        } else if (IsShelfHiddenForFullscreen()) {
           SetState(SHELF_HIDDEN);
         } else {
           // The shelf is sometimes not hidden when in immersive fullscreen.
           // Force the shelf to be auto hidden in this case.
           SetState(SHELF_AUTO_HIDE);
         }
         break;
       }
       case wm::WORKSPACE_WINDOW_STATE_MAXIMIZED:
-        SetState(CalculateShelfVisibility());
+        if (IsShelfAutoHideForFullscreenMaximized()) {
+          SetState(SHELF_AUTO_HIDE);
+        } else {
+          SetState(CalculateShelfVisibility());
+        }
         break;
 
       case wm::WORKSPACE_WINDOW_STATE_WINDOW_OVERLAPS_SHELF:
       case wm::WORKSPACE_WINDOW_STATE_DEFAULT:
         SetState(CalculateShelfVisibility());
         SetWindowOverlapsShelf(
             window_state == wm::WORKSPACE_WINDOW_STATE_WINDOW_OVERLAPS_SHELF);
         break;
     }
   }
@@ skipping 768 matching lines @@
              : 0.0f;
 }
 
 bool ShelfLayoutManager::IsShelfHiddenForFullscreen() const {
   const WmWindow* fullscreen_window = wm::GetWindowForFullscreenMode(
       WmLookup::Get()->GetWindowForWidget(shelf_widget_));
   return fullscreen_window &&
          fullscreen_window->GetWindowState()->hide_shelf_when_fullscreen();
 }
 
+bool ShelfLayoutManager::IsShelfAutoHideForFullscreenMaximized() const {
+  wm::WindowState* active_window = wm::GetActiveWindowState();
+  return active_window &&
+         active_window->autohide_shelf_when_maximized_or_fullscreen();
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // ShelfLayoutManager, Gesture functions:
 
 void ShelfLayoutManager::StartGestureDrag(const ui::GestureEvent& gesture) {
   gesture_drag_status_ = GESTURE_DRAG_IN_PROGRESS;
   gesture_drag_amount_ = 0.f;
   gesture_drag_auto_hide_state_ = visibility_state() == SHELF_AUTO_HIDE
                                       ? auto_hide_state()
                                       : SHELF_AUTO_HIDE_SHOWN;
   MaybeUpdateShelfBackground(AnimationChangeType::ANIMATE);
@@ skipping 75 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