It is time.

ui/wm/core/window_modality_controller.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 "ui/wm/core/window_modality_controller.h"
-
-#include <algorithm>
-
-#include "ui/aura/client/aura_constants.h"
-#include "ui/aura/client/capture_client.h"
-#include "ui/aura/env.h"
-#include "ui/aura/window.h"
-#include "ui/aura/window_event_dispatcher.h"
-#include "ui/aura/window_property.h"
-#include "ui/base/ui_base_types.h"
-#include "ui/events/event.h"
-#include "ui/events/event_target.h"
-#include "ui/events/gestures/gesture_recognizer.h"
-#include "ui/wm/core/window_animations.h"
-#include "ui/wm/core/window_util.h"
-
-namespace wm {
-
-// Transient child's modal parent.
-extern const aura::WindowProperty<aura::Window*>* const kModalParentKey;
-DEFINE_WINDOW_PROPERTY_KEY(aura::Window*, kModalParentKey, NULL);
-
-namespace {
-
-bool HasAncestor(aura::Window* window, aura::Window* ancestor) {
-  if (!window)
-    return false;
-  if (window == ancestor)
-    return true;
-  return HasAncestor(window->parent(), ancestor);
-}
-
-bool TransientChildIsWindowModal(aura::Window* window) {
-  return window->GetProperty(aura::client::kModalKey) == ui::MODAL_TYPE_WINDOW;
-}
-
-bool TransientChildIsSystemModal(aura::Window* window) {
-  return window->GetProperty(aura::client::kModalKey) == ui::MODAL_TYPE_SYSTEM;
-}
-
-bool TransientChildIsChildModal(aura::Window* window) {
-  return window->GetProperty(aura::client::kModalKey) == ui::MODAL_TYPE_CHILD;
-}
-
-aura::Window* GetModalParent(aura::Window* window) {
-  return window->GetProperty(kModalParentKey);
-}
-
-bool IsModalTransientChild(aura::Window* transient, aura::Window* original) {
-  return transient->IsVisible() &&
-      (TransientChildIsWindowModal(transient) ||
-       TransientChildIsSystemModal(transient) ||
-       (TransientChildIsChildModal(transient) &&
-        (HasAncestor(original, GetModalParent(transient)))));
-}
-
-aura::Window* GetModalTransientChild(
-    aura::Window* activatable,
-    aura::Window* original) {
-  for (aura::Window::Windows::const_iterator it =
-           GetTransientChildren(activatable).begin();
-       it != GetTransientChildren(activatable).end();
-       ++it) {
-    aura::Window* transient = *it;
-    if (IsModalTransientChild(transient, original)) {
-      return GetTransientChildren(transient).empty() ?
-          transient : GetModalTransientChild(transient, original);
-    }
-  }
-  return NULL;
-}
-
-}  // namespace
-
-void SetModalParent(aura::Window* child, aura::Window* parent) {
-  child->SetProperty(kModalParentKey, parent);
-}
-
-aura::Window* GetModalTransient(aura::Window* window) {
-  if (!window)
-    return NULL;
-
-  // We always want to check the for the transient child of the toplevel window.
-  aura::Window* toplevel = GetToplevelWindow(window);
-  if (!toplevel)
-    return NULL;
-
-  return GetModalTransientChild(toplevel, window);
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// WindowModalityController, public:
-
-WindowModalityController::WindowModalityController(
-    ui::EventTarget* event_target)
-    : event_target_(event_target) {
-  aura::Env::GetInstance()->AddObserver(this);
-  DCHECK(event_target->IsPreTargetListEmpty());
-  event_target_->AddPreTargetHandler(this);
-}
-
-WindowModalityController::~WindowModalityController() {
-  event_target_->RemovePreTargetHandler(this);
-  aura::Env::GetInstance()->RemoveObserver(this);
-  for (size_t i = 0; i < windows_.size(); ++i)
-    windows_[i]->RemoveObserver(this);
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// WindowModalityController, aura::EventFilter implementation:
-
-void WindowModalityController::OnKeyEvent(ui::KeyEvent* event) {
-  aura::Window* target = static_cast<aura::Window*>(event->target());
-  if (GetModalTransient(target))
-    event->SetHandled();
-}
-
-void WindowModalityController::OnMouseEvent(ui::MouseEvent* event) {
-  aura::Window* target = static_cast<aura::Window*>(event->target());
-  if (ProcessLocatedEvent(target, event))
-   event->SetHandled();
-}
-
-void WindowModalityController::OnTouchEvent(ui::TouchEvent* event) {
-  aura::Window* target = static_cast<aura::Window*>(event->target());
-  if (ProcessLocatedEvent(target, event))
-    event->SetHandled();
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// WindowModalityController, aura::EnvObserver implementation:
-
-void WindowModalityController::OnWindowInitialized(aura::Window* window) {
-  windows_.push_back(window);
-  window->AddObserver(this);
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// WindowModalityController, aura::WindowObserver implementation:
-
-void WindowModalityController::OnWindowPropertyChanged(aura::Window* window,
-                                                       const void* key,
-                                                       intptr_t old) {
-  // In tests, we sometimes create the modality relationship after a window is
-  // visible.
-  if (key == aura::client::kModalKey &&
-      window->GetProperty(aura::client::kModalKey) != ui::MODAL_TYPE_NONE &&
-      window->IsVisible()) {
-    ActivateWindow(window);
-    ui::GestureRecognizer::Get()->TransferEventsTo(GetTransientParent(window),
-                                                   NULL);
-  }
-}
-
-void WindowModalityController::OnWindowVisibilityChanged(
-    aura::Window* window,
-    bool visible) {
-  if (visible && window->GetProperty(aura::client::kModalKey) !=
-      ui::MODAL_TYPE_NONE) {
-    ui::GestureRecognizer::Get()->TransferEventsTo(GetTransientParent(window),
-                                                   NULL);
-    // Make sure no other window has capture, otherwise |window| won't get mouse
-    // events.
-    aura::Window* capture_window = aura::client::GetCaptureWindow(window);
-    if (capture_window)
-      capture_window->ReleaseCapture();
-  }
-}
-
-void WindowModalityController::OnWindowDestroyed(aura::Window* window) {
-  windows_.erase(std::find(windows_.begin(), windows_.end(), window));
-  window->RemoveObserver(this);
-}
-
-bool WindowModalityController::ProcessLocatedEvent(aura::Window* target,
-                                                   ui::LocatedEvent* event) {
-  if (event->handled())
-    return false;
-  aura::Window* modal_transient_child = GetModalTransient(target);
-  if (modal_transient_child && (event->type() == ui::ET_MOUSE_PRESSED ||
-                                event->type() == ui::ET_TOUCH_PRESSED)) {
-    // Activate top window if transient child window is window modal.
-    if (TransientChildIsWindowModal(modal_transient_child)) {
-      aura::Window* toplevel = GetToplevelWindow(target);
-      DCHECK(toplevel);
-      ActivateWindow(toplevel);
-    }
-
-    AnimateWindow(modal_transient_child, WINDOW_ANIMATION_TYPE_BOUNCE);
-  }
-  if (event->type() == ui::ET_TOUCH_CANCELLED)
-    return false;
-  return !!modal_transient_child;
-}
-
-}  // namespace wm