Add LockLayoutManager responsible for lock container (login/lock).

ash/wm/lock_layout_manager.cc

+// 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/lock_layout_manager.h"
+
+#include "ash/shell.h"
+#include "ash/shell_delegate.h"
+#include "ash/wm/lock_window_state.h"
+#include "ash/wm/window_state.h"
+#include "ash/wm/wm_event.h"
+#include "ui/aura/window.h"
+#include "ui/aura/window_observer.h"
+#include "ui/events/event.h"
+#include "ui/keyboard/keyboard_controller.h"
+#include "ui/keyboard/keyboard_util.h"
+
+using aura::Window;

[oshima, 2014/06/05 17:09:05]

nit: you're using both Window and aura::Window. please be consistent. I
generally avoid using using for aura:: though, because it's short enough that it
doesn't bother me.

[Nikita (slow), 2014/06/06 04:31:30]

Done.

+
+namespace ash {
+
+LockLayoutManager::LockLayoutManager(aura::Window* window)
+    : window_(window),
+      root_window_(window->GetRootWindow()),
+      is_observing_keyboard_(false) {
+  Shell::GetInstance()->delegate()->AddVirtualKeyboardStateObserver(this);
+  root_window_->AddObserver(this);
+  if (keyboard::KeyboardController::GetInstance()) {
+    keyboard::KeyboardController::GetInstance()->AddObserver(this);
+    is_observing_keyboard_ = true;
+  }
+}
+
+LockLayoutManager::~LockLayoutManager() {
+  if (root_window_)
+    root_window_->RemoveObserver(this);
+
+  for (aura::Window::Windows::const_iterator it = window_->children().begin();
+       it != window_->children().end(); ++it) {
+    (*it)->RemoveObserver(this);
+  }
+
+  Shell::GetInstance()->delegate()->RemoveVirtualKeyboardStateObserver(this);
+
+  if (keyboard::KeyboardController::GetInstance() && is_observing_keyboard_) {
+    keyboard::KeyboardController::GetInstance()->RemoveObserver(this);
+    is_observing_keyboard_ = false;
+  }
+}
+
+void LockLayoutManager::OnWindowResized() {
+  const wm::WMEvent event(wm::WM_EVENT_WORKAREA_BOUNDS_CHANGED);
+  AdjustWindowsForWorkAreaChange(&event);
+}
+
+void LockLayoutManager::OnWindowAddedToLayout(Window* child) {
+  child->AddObserver(this);
+
+  // LockWindowState replaces default WindowState of a child.
+  wm::WindowState* window_state = LockWindowState::SetLockWindowState(child);
+  wm::WMEvent event(wm::WM_EVENT_ADDED_TO_WORKSPACE);
+  window_state->OnWMEvent(&event);
+}
+
+void LockLayoutManager::OnWillRemoveWindowFromLayout(Window* child) {
+  child->RemoveObserver(this);
+}
+
+void LockLayoutManager::OnWindowRemovedFromLayout(Window* child) {
+}
+
+void LockLayoutManager::OnChildWindowVisibilityChanged(Window* child,
+                                                       bool visible) {
+}
+
+void LockLayoutManager::SetChildBounds(
+    Window* child,
+    const gfx::Rect& requested_bounds) {
+  wm::WindowState* window_state = wm::GetWindowState(child);
+  wm::SetBoundsEvent event(wm::WM_EVENT_SET_BOUNDS, requested_bounds);
+  window_state->OnWMEvent(&event);
+}
+
+void LockLayoutManager::OnWindowHierarchyChanged(
+    const WindowObserver::HierarchyChangeParams& params) {
+}
+
+void LockLayoutManager::OnWindowPropertyChanged(Window* window,
+                                                const void* key,
+                                                intptr_t old) {
+}
+
+void LockLayoutManager::OnWindowStackingChanged(aura::Window* window) {
+}
+
+void LockLayoutManager::OnWindowDestroying(aura::Window* window) {
+  if (root_window_ == window) {
+    root_window_->RemoveObserver(this);
+    root_window_ = NULL;
+  } else {
+    ForgetWindow(window);
+  }

[oshima, 2014/06/05 17:09:04]

can now this be just

window->RemoveObserver(this);
if (root_window_ == window)
  root_window_ = NULL;

?

[Nikita (slow), 2014/06/06 04:31:30]

Done.

+}
+
+void LockLayoutManager::OnWindowBoundsChanged(aura::Window* window,
+                                              const gfx::Rect& old_bounds,
+                                              const gfx::Rect& new_bounds) {
+  if (root_window_ == window) {
+    const wm::WMEvent wm_event(wm::WM_EVENT_DISPLAY_BOUNDS_CHANGED);
+    AdjustWindowsForWorkAreaChange(&wm_event);
+  }
+}
+
+void LockLayoutManager::OnVirtualKeyboardStateChanged(bool activated) {
+  if (keyboard::KeyboardController::GetInstance()) {
+    if (activated) {
+      if (!is_observing_keyboard_) {
+        keyboard::KeyboardController::GetInstance()->AddObserver(this);
+        is_observing_keyboard_ = true;
+      }
+    } else {
+      keyboard::KeyboardController::GetInstance()->RemoveObserver(this);
+      is_observing_keyboard_ = false;
+    }
+  }
+}
+
+void LockLayoutManager::OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) {
+  keyboard_bounds_ = new_bounds;
+  OnWindowResized();
+}
+
+void LockLayoutManager::AdjustWindowsForWorkAreaChange(
+    const wm::WMEvent* event) {
+  DCHECK(event->type() == wm::WM_EVENT_DISPLAY_BOUNDS_CHANGED ||
+         event->type() == wm::WM_EVENT_WORKAREA_BOUNDS_CHANGED);
+
+  for (aura::Window::Windows::const_iterator it = window_->children().begin();
+       it != window_->children().end();
+       ++it) {
+    wm::GetWindowState(*it)->OnWMEvent(event);
+  }
+}
+
+void LockLayoutManager::ForgetWindow(aura::Window* window) {
+  window->RemoveObserver(this);
+}
+
+}  // namespace ash