Moves handful of classes in ash/wm/maximize_mode to ash/common

ash/wm/maximize_mode/maximize_mode_window_manager.cc

Index: ash/wm/maximize_mode/maximize_mode_window_manager.cc
diff --git a/ash/wm/maximize_mode/maximize_mode_window_manager.cc b/ash/wm/maximize_mode/maximize_mode_window_manager.cc
deleted file mode 100644
index 74632be54632a3aed6d6cbae2738e36b77fac701..0000000000000000000000000000000000000000
--- a/ash/wm/maximize_mode/maximize_mode_window_manager.cc
+++ /dev/null
@@ -1,285 +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/maximize_mode/maximize_mode_window_manager.h"
-
-#include "ash/common/ash_switches.h"
-#include "ash/common/session/session_state_delegate.h"
-#include "ash/common/shell_window_ids.h"
-#include "ash/common/wm/maximize_mode/maximize_mode_event_handler.h"
-#include "ash/common/wm/mru_window_tracker.h"
-#include "ash/common/wm/overview/window_selector_controller.h"
-#include "ash/common/wm/window_state.h"
-#include "ash/common/wm/wm_event.h"
-#include "ash/common/wm_root_window_controller.h"
-#include "ash/common/wm_shell.h"
-#include "ash/common/wm_window.h"
-#include "ash/common/wm_window_property.h"
-#include "ash/wm/maximize_mode/maximize_mode_window_state.h"
-#include "ash/wm/maximize_mode/workspace_backdrop_delegate.h"
-#include "base/command_line.h"
-#include "base/memory/ptr_util.h"
-#include "base/stl_util.h"
-#include "ui/display/screen.h"
-
-namespace ash {
-
-namespace {
-
-// Exits overview mode if it is currently active.
-void CancelOverview() {
-  WindowSelectorController* controller =
-      WmShell::Get()->window_selector_controller();
-  if (controller->IsSelecting())
-    controller->OnSelectionEnded();
-}
-
-}  // namespace
-
-MaximizeModeWindowManager::~MaximizeModeWindowManager() {
-  // Overview mode needs to be ended before exiting maximize mode to prevent
-  // transforming windows which are currently in
-  // overview: http://crbug.com/366605
-  CancelOverview();
-
-  WmShell::Get()->RemoveShellObserver(this);
-  display::Screen::GetScreen()->RemoveObserver(this);
-  EnableBackdropBehindTopWindowOnEachDisplay(false);
-  RemoveWindowCreationObservers();
-  RestoreAllWindows();
-}
-
-int MaximizeModeWindowManager::GetNumberOfManagedWindows() {
-  return window_state_map_.size();
-}
-
-void MaximizeModeWindowManager::AddWindow(WmWindow* window) {
-  // Only add the window if it is a direct dependent of a container window
-  // and not yet tracked.
-  if (!ShouldHandleWindow(window) || ContainsKey(window_state_map_, window) ||
-      !IsContainerWindow(window->GetParent())) {
-    return;
-  }
-
-  MaximizeAndTrackWindow(window);
-}
-
-void MaximizeModeWindowManager::WindowStateDestroyed(WmWindow* 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 MaximizeModeWindowManager::OnOverviewModeStarting() {
-  if (backdrops_hidden_)
-    return;
-
-  EnableBackdropBehindTopWindowOnEachDisplay(false);
-  SetDeferBoundsUpdates(true);
-  backdrops_hidden_ = true;
-}
-
-void MaximizeModeWindowManager::OnOverviewModeEnded() {
-  if (!backdrops_hidden_)
-    return;
-
-  backdrops_hidden_ = false;
-  EnableBackdropBehindTopWindowOnEachDisplay(true);
-  SetDeferBoundsUpdates(false);
-}
-
-void MaximizeModeWindowManager::OnWindowDestroying(WmWindow* window) {
-  if (IsContainerWindow(window)) {
-    // container window can be removed on display destruction.
-    window->RemoveObserver(this);
-    observed_container_windows_.erase(window);
-  } else {
-    // If a known window gets destroyed we need to remove all knowledge about
-    // it.
-    ForgetWindow(window);
-  }
-}
-
-void MaximizeModeWindowManager::OnWindowTreeChanged(
-    WmWindow* window,
-    const TreeChangeParams& params) {
-  // A window can get removed and then re-added by a drag and drop operation.
-  if (params.new_parent && IsContainerWindow(params.new_parent) &&
-      !ContainsKey(window_state_map_, params.target)) {
-    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 (ContainsKey(window_state_map_, params.target)) {
-      wm::WMEvent event(wm::WM_EVENT_ADDED_TO_WORKSPACE);
-      params.target->GetWindowState()->OnWMEvent(&event);
-    }
-  }
-}
-
-void MaximizeModeWindowManager::OnWindowPropertyChanged(
-    WmWindow* window,
-    WmWindowProperty property) {
-  // Stop managing |window| if the always-on-top property is added.
-  if (property == WmWindowProperty::ALWAYS_ON_TOP && window->IsAlwaysOnTop())
-    ForgetWindow(window);
-}
-
-void MaximizeModeWindowManager::OnWindowBoundsChanged(
-    WmWindow* 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(pair.first->GetWindowState());
-}
-
-void MaximizeModeWindowManager::OnDisplayAdded(
-    const display::Display& display) {
-  DisplayConfigurationChanged();
-}
-
-void MaximizeModeWindowManager::OnDisplayRemoved(
-    const display::Display& display) {
-  DisplayConfigurationChanged();
-}
-
-void MaximizeModeWindowManager::OnDisplayMetricsChanged(const display::Display&,
-                                                        uint32_t) {
-  // Nothing to do here.
-}
-
-MaximizeModeWindowManager::MaximizeModeWindowManager()
-    : backdrops_hidden_(false) {
-  // The overview mode needs to be ended before the maximize 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);
-  WmShell::Get()->AddShellObserver(this);
-  event_handler_ = WmShell::Get()->CreateMaximizeModeEventHandler();
-}
-
-void MaximizeModeWindowManager::MaximizeAllWindows() {
-  MruWindowTracker::WindowList windows =
-      WmShell::Get()->GetMruWindowTracker()->BuildWindowListIgnoreModal();
-  // Add all existing Mru windows.
-  for (WmWindow* window : windows)
-    MaximizeAndTrackWindow(window);
-}
-
-void MaximizeModeWindowManager::RestoreAllWindows() {
-  while (window_state_map_.size())
-    ForgetWindow(window_state_map_.begin()->first);
-}
-
-void MaximizeModeWindowManager::SetDeferBoundsUpdates(
-    bool defer_bounds_updates) {
-  for (auto& pair : window_state_map_)
-    pair.second->SetDeferBoundsUpdates(defer_bounds_updates);
-}
-
-void MaximizeModeWindowManager::MaximizeAndTrackWindow(WmWindow* window) {
-  if (!ShouldHandleWindow(window))
-    return;
-
-  DCHECK(!ContainsKey(window_state_map_, window));
-  window->AddObserver(this);
-
-  // We create and remember a maximize mode state which will attach itself to
-  // the provided state object.
-  window_state_map_[window] = new MaximizeModeWindowState(window, this);
-}
-
-void MaximizeModeWindowManager::ForgetWindow(WmWindow* 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->LeaveMaximizeMode(it->first->GetWindowState());
-  DCHECK(!ContainsKey(window_state_map_, window));
-}
-
-bool MaximizeModeWindowManager::ShouldHandleWindow(WmWindow* window) {
-  DCHECK(window);
-
-  // Windows with the always-on-top property should be free-floating and thus
-  // not managed by us.
-  if (window->IsAlwaysOnTop())
-    return false;
-
-  // Windows in the dock should not be managed by us.
-  if (window->GetWindowState()->IsDocked())
-    return false;
-
-  return window->GetType() == ui::wm::WINDOW_TYPE_NORMAL;
-}
-
-void MaximizeModeWindowManager::AddWindowCreationObservers() {
-  DCHECK(observed_container_windows_.empty());
-  // Observe window activations/creations in the default containers on all root
-  // windows.
-  for (WmWindow* root : WmShell::Get()->GetAllRootWindows()) {
-    WmWindow* default_container =
-        root->GetChildByShellWindowId(kShellWindowId_DefaultContainer);
-    DCHECK(!ContainsKey(observed_container_windows_, default_container));
-    default_container->AddObserver(this);
-    observed_container_windows_.insert(default_container);
-  }
-}
-
-void MaximizeModeWindowManager::RemoveWindowCreationObservers() {
-  for (WmWindow* window : observed_container_windows_)
-    window->RemoveObserver(this);
-  observed_container_windows_.clear();
-}
-
-void MaximizeModeWindowManager::DisplayConfigurationChanged() {
-  EnableBackdropBehindTopWindowOnEachDisplay(false);
-  RemoveWindowCreationObservers();
-  AddWindowCreationObservers();
-  EnableBackdropBehindTopWindowOnEachDisplay(true);
-}
-
-bool MaximizeModeWindowManager::IsContainerWindow(WmWindow* window) {
-  return ContainsKey(observed_container_windows_, window);
-}
-
-void MaximizeModeWindowManager::EnableBackdropBehindTopWindowOnEachDisplay(
-    bool enable) {
-  // This function should be a no-op if backdrops have been disabled.
-  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kAshDisableMaximizeModeWindowBackdrop)) {
-    return;
-  }
-
-  if (backdrops_hidden_)
-    return;
-
-  // Inform the WorkspaceLayoutManager that we want to show a backdrop behind
-  // the topmost window of its container.
-  for (WmWindow* root : WmShell::Get()->GetAllRootWindows()) {
-    WmRootWindowController* controller = root->GetRootWindowController();
-    WmWindow* default_container =
-        root->GetChildByShellWindowId(kShellWindowId_DefaultContainer);
-    controller->SetMaximizeBackdropDelegate(base::WrapUnique(
-        enable ? new WorkspaceBackdropDelegate(default_container) : nullptr));
-  }
-}
-
-}  // namespace ash