Revert of Rename MaximizeMode to TabletMode

ash/wm/tablet_mode/tablet_mode_window_manager.cc

Index: ash/wm/tablet_mode/tablet_mode_window_manager.cc
diff --git a/ash/wm/tablet_mode/tablet_mode_window_manager.cc b/ash/wm/tablet_mode/tablet_mode_window_manager.cc
deleted file mode 100644
index ee032c03b36457706da50c61e4bf327b651b2e62..0000000000000000000000000000000000000000
--- a/ash/wm/tablet_mode/tablet_mode_window_manager.cc
+++ /dev/null
@@ -1,306 +0,0 @@
-// Copyright 2014 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/wm/tablet_mode/tablet_mode_window_manager.h"
-
-#include "ash/ash_switches.h"
-#include "ash/public/cpp/shell_window_ids.h"
-#include "ash/root_window_controller.h"
-#include "ash/session/session_state_delegate.h"
-#include "ash/shell.h"
-#include "ash/shell_port.h"
-#include "ash/wm/mru_window_tracker.h"
-#include "ash/wm/overview/window_selector_controller.h"
-#include "ash/wm/tablet_mode/tablet_mode_backdrop_delegate_impl.h"
-#include "ash/wm/tablet_mode/tablet_mode_event_handler.h"
-#include "ash/wm/tablet_mode/tablet_mode_window_state.h"
-#include "ash/wm/window_state.h"
-#include "ash/wm/wm_event.h"
-#include "ash/wm/workspace_controller.h"
-#include "base/command_line.h"
-#include "base/memory/ptr_util.h"
-#include "base/stl_util.h"
-#include "ui/aura/client/aura_constants.h"
-#include "ui/display/screen.h"
-
-namespace ash {
-
-namespace {
-
-// Exits overview mode if it is currently active.
-void CancelOverview() {
-  WindowSelectorController* controller =
-      Shell::Get()->window_selector_controller();
-  if (controller->IsSelecting())
-    controller->OnSelectionEnded();
-}
-
-}  // namespace
-
-TabletModeWindowManager::~TabletModeWindowManager() {
-  // Overview mode needs to be ended before exiting tablet mode to prevent
-  // transforming windows which are currently in
-  // overview: http://crbug.com/366605
-  CancelOverview();
-  for (aura::Window* window : added_windows_)
-    window->RemoveObserver(this);
-  added_windows_.clear();
-  Shell::Get()->RemoveShellObserver(this);
-  display::Screen::GetScreen()->RemoveObserver(this);
-  EnableBackdropBehindTopWindowOnEachDisplay(false);
-  RemoveWindowCreationObservers();
-  RestoreAllWindows();
-}
-
-int TabletModeWindowManager::GetNumberOfManagedWindows() {
-  return window_state_map_.size();
-}
-
-void TabletModeWindowManager::AddWindow(aura::Window* window) {
-  // Only add the window if it is a direct dependent of a container window
-  // and not yet tracked.
-  if (!ShouldHandleWindow(window) ||
-      base::ContainsKey(window_state_map_, window) ||
-      !IsContainerWindow(window->parent())) {
-    return;
-  }
-
-  MaximizeAndTrackWindow(window);
-}
-
-void TabletModeWindowManager::WindowStateDestroyed(aura::Window* window) {
-  // At this time ForgetWindow() should already have been called. If not,
-  // someone else must have replaced the "window manager's state object".
-  DCHECK(!window->HasObserver(this));
-
-  auto it = window_state_map_.find(window);
-  DCHECK(it != window_state_map_.end());
-  window_state_map_.erase(it);
-}
-
-void TabletModeWindowManager::OnOverviewModeStarting() {
-  SetDeferBoundsUpdates(true);
-}
-
-void TabletModeWindowManager::OnOverviewModeEnded() {
-  SetDeferBoundsUpdates(false);
-}
-
-void TabletModeWindowManager::OnWindowDestroying(aura::Window* window) {
-  if (IsContainerWindow(window)) {
-    // container window can be removed on display destruction.
-    window->RemoveObserver(this);
-    observed_container_windows_.erase(window);
-  } else if (base::ContainsValue(added_windows_, window)) {
-    // Added window was destroyed before being shown.
-    added_windows_.erase(window);
-    window->RemoveObserver(this);
-  } else {
-    // If a known window gets destroyed we need to remove all knowledge about
-    // it.
-    ForgetWindow(window);
-  }
-}
-
-void TabletModeWindowManager::OnWindowHierarchyChanged(
-    const HierarchyChangeParams& params) {
-  // A window can get removed and then re-added by a drag and drop operation.
-  if (params.new_parent && IsContainerWindow(params.new_parent) &&
-      !base::ContainsKey(window_state_map_, params.target)) {
-    // Don't register the window if the window is invisible. Instead,
-    // wait until it becomes visible because the client may update the
-    // flag to control if the window should be added.
-    if (!params.target->IsVisible()) {
-      if (!base::ContainsValue(added_windows_, params.target)) {
-        added_windows_.insert(params.target);
-        params.target->AddObserver(this);
-      }
-      return;
-    }
-    MaximizeAndTrackWindow(params.target);
-    // When the state got added, the "WM_EVENT_ADDED_TO_WORKSPACE" event got
-    // already sent and we have to notify our state again.
-    if (base::ContainsKey(window_state_map_, params.target)) {
-      wm::WMEvent event(wm::WM_EVENT_ADDED_TO_WORKSPACE);
-      wm::GetWindowState(params.target)->OnWMEvent(&event);
-    }
-  }
-}
-
-void TabletModeWindowManager::OnWindowPropertyChanged(aura::Window* window,
-                                                      const void* key,
-                                                      intptr_t old) {
-  // Stop managing |window| if the always-on-top property is added.
-  if (key == aura::client::kAlwaysOnTopKey &&
-      window->GetProperty(aura::client::kAlwaysOnTopKey)) {
-    ForgetWindow(window);
-  }
-}
-
-void TabletModeWindowManager::OnWindowBoundsChanged(
-    aura::Window* window,
-    const gfx::Rect& old_bounds,
-    const gfx::Rect& new_bounds) {
-  if (!IsContainerWindow(window))
-    return;
-  // Reposition all non maximizeable windows.
-  for (auto& pair : window_state_map_)
-    pair.second->UpdateWindowPosition(wm::GetWindowState(pair.first));
-}
-
-void TabletModeWindowManager::OnWindowVisibilityChanged(aura::Window* window,
-                                                        bool visible) {
-  // Skip if it's already managed.
-  if (base::ContainsKey(window_state_map_, window))
-    return;
-
-  if (IsContainerWindow(window->parent()) &&
-      base::ContainsValue(added_windows_, window) && visible) {
-    added_windows_.erase(window);
-    window->RemoveObserver(this);
-    MaximizeAndTrackWindow(window);
-    // When the state got added, the "WM_EVENT_ADDED_TO_WORKSPACE" event got
-    // already sent and we have to notify our state again.
-    if (base::ContainsKey(window_state_map_, window)) {
-      wm::WMEvent event(wm::WM_EVENT_ADDED_TO_WORKSPACE);
-      wm::GetWindowState(window)->OnWMEvent(&event);
-    }
-  }
-}
-
-void TabletModeWindowManager::OnDisplayAdded(const display::Display& display) {
-  DisplayConfigurationChanged();
-}
-
-void TabletModeWindowManager::OnDisplayRemoved(
-    const display::Display& display) {
-  DisplayConfigurationChanged();
-}
-
-void TabletModeWindowManager::OnDisplayMetricsChanged(const display::Display&,
-                                                      uint32_t) {
-  // Nothing to do here.
-}
-
-void TabletModeWindowManager::SetIgnoreWmEventsForExit() {
-  for (auto& pair : window_state_map_) {
-    pair.second->set_ignore_wm_events(true);
-  }
-}
-
-TabletModeWindowManager::TabletModeWindowManager() {
-  // The overview mode needs to be ended before the tablet mode is started. To
-  // guarantee the proper order, it will be turned off from here.
-  CancelOverview();
-
-  MaximizeAllWindows();
-  AddWindowCreationObservers();
-  EnableBackdropBehindTopWindowOnEachDisplay(true);
-  display::Screen::GetScreen()->AddObserver(this);
-  Shell::Get()->AddShellObserver(this);
-  event_handler_ = ShellPort::Get()->CreateTabletModeEventHandler();
-}
-
-void TabletModeWindowManager::MaximizeAllWindows() {
-  MruWindowTracker::WindowList windows =
-      Shell::Get()->mru_window_tracker()->BuildWindowListIgnoreModal();
-  // Add all existing MRU windows.
-  for (auto* window : windows)
-    MaximizeAndTrackWindow(window);
-}
-
-void TabletModeWindowManager::RestoreAllWindows() {
-  while (window_state_map_.size())
-    ForgetWindow(window_state_map_.begin()->first);
-}
-
-void TabletModeWindowManager::SetDeferBoundsUpdates(bool defer_bounds_updates) {
-  for (auto& pair : window_state_map_)
-    pair.second->SetDeferBoundsUpdates(defer_bounds_updates);
-}
-
-void TabletModeWindowManager::MaximizeAndTrackWindow(aura::Window* window) {
-  if (!ShouldHandleWindow(window))
-    return;
-
-  DCHECK(!base::ContainsKey(window_state_map_, window));
-  window->AddObserver(this);
-
-  // We create and remember a tablet mode state which will attach itself to
-  // the provided state object.
-  window_state_map_[window] = new TabletModeWindowState(window, this);
-}
-
-void TabletModeWindowManager::ForgetWindow(aura::Window* window) {
-  WindowToState::iterator it = window_state_map_.find(window);
-
-  // The following DCHECK could fail if our window state object was destroyed
-  // earlier by someone else. However - at this point there is no other client
-  // which replaces the state object and therefore this should not happen.
-  DCHECK(it != window_state_map_.end());
-  window->RemoveObserver(this);
-
-  // By telling the state object to revert, it will switch back the old
-  // State object and destroy itself, calling WindowStateDestroyed().
-  it->second->LeaveTabletMode(wm::GetWindowState(it->first));
-  DCHECK(!base::ContainsKey(window_state_map_, window));
-}
-
-bool TabletModeWindowManager::ShouldHandleWindow(aura::Window* window) {
-  DCHECK(window);
-
-  // Windows with the always-on-top property should be free-floating and thus
-  // not managed by us.
-  if (window->GetProperty(aura::client::kAlwaysOnTopKey))
-    return false;
-
-  // If the changing bounds in the maximized/fullscreen is allowed, then
-  // let the client manage it even in tablet mode.
-  if (wm::GetWindowState(window)->allow_set_bounds_direct())
-    return false;
-
-  return window->type() == aura::client::WINDOW_TYPE_NORMAL;
-}
-
-void TabletModeWindowManager::AddWindowCreationObservers() {
-  DCHECK(observed_container_windows_.empty());
-  // Observe window activations/creations in the default containers on all root
-  // windows.
-  for (aura::Window* root : Shell::GetAllRootWindows()) {
-    aura::Window* default_container =
-        root->GetChildById(kShellWindowId_DefaultContainer);
-    DCHECK(!base::ContainsKey(observed_container_windows_, default_container));
-    default_container->AddObserver(this);
-    observed_container_windows_.insert(default_container);
-  }
-}
-
-void TabletModeWindowManager::RemoveWindowCreationObservers() {
-  for (aura::Window* window : observed_container_windows_)
-    window->RemoveObserver(this);
-  observed_container_windows_.clear();
-}
-
-void TabletModeWindowManager::DisplayConfigurationChanged() {
-  EnableBackdropBehindTopWindowOnEachDisplay(false);
-  RemoveWindowCreationObservers();
-  AddWindowCreationObservers();
-  EnableBackdropBehindTopWindowOnEachDisplay(true);
-}
-
-bool TabletModeWindowManager::IsContainerWindow(aura::Window* window) {
-  return base::ContainsKey(observed_container_windows_, window);
-}
-
-void TabletModeWindowManager::EnableBackdropBehindTopWindowOnEachDisplay(
-    bool enable) {
-  // Inform the WorkspaceLayoutManager that we want to show a backdrop behind
-  // the topmost window of its container.
-  for (auto* controller : Shell::GetAllRootWindowControllers()) {
-    controller->workspace_controller()->SetBackdropDelegate(
-        enable ? base::MakeUnique<TabletModeBackdropDelegateImpl>() : nullptr);
-  }
-}
-
-}  // namespace ash