Revert 291221 "Athena: Adding basic resource management framewor..."

trunk/src/athena/content/app_activity_registry.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 "athena/content/app_activity_registry.h"
-
-#include "athena/activity/public/activity_manager.h"
-#include "athena/content/app_activity.h"
-#include "athena/content/app_activity_proxy.h"
-#include "athena/content/public/app_content_control_delegate.h"
-#include "athena/content/public/app_registry.h"
-#include "ui/aura/window.h"
-#include "ui/views/view.h"
-#include "ui/views/widget/widget.h"
-
-namespace athena {
-
-AppActivityRegistry::AppActivityRegistry(
-    const std::string& app_id,
-    content::BrowserContext* browser_context) :
-      app_id_(app_id),
-      browser_context_(browser_context),
-      unloaded_activity_proxy_(NULL) {}
-
-AppActivityRegistry::~AppActivityRegistry() {
-  CHECK(activity_list_.empty());
-  if (unloaded_activity_proxy_)
-    ActivityManager::Get()->RemoveActivity(unloaded_activity_proxy_);
-  DCHECK(!unloaded_activity_proxy_);
-}
-
-void AppActivityRegistry::RegisterAppActivity(AppActivity* app_activity) {
-  if (unloaded_activity_proxy_) {
-    // Since we add an application window, the activity isn't unloaded anymore.
-    ActivityManager::Get()->RemoveActivity(unloaded_activity_proxy_);
-    // With the removal the object should have been deleted and we should have
-    // been informed of the object's destruction.
-    DCHECK(!unloaded_activity_proxy_);
-  }
-  // The same window should never be added twice.
-  CHECK(std::find(activity_list_.begin(),
-                  activity_list_.end(),
-                  app_activity) == activity_list_.end());
-  activity_list_.push_back(app_activity);
-}
-
-void AppActivityRegistry::UnregisterAppActivity(AppActivity* app_activity) {
-  // It is possible that a detach gets called without ever being attached.
-  std::vector<AppActivity*>::iterator it =
-      std::find(activity_list_.begin(), activity_list_.end(), app_activity);
-  if (it == activity_list_.end())
-    return;
-
-  activity_list_.erase(it);
-  // When the last window gets destroyed and there is no proxy to restart, we
-  // delete ourselves.
-  if (activity_list_.empty() && !unloaded_activity_proxy_) {
-    AppRegistry::Get()->RemoveAppActivityRegistry(this);
-    // after this call this object should be gone.
-  }
-}
-
-AppActivity* AppActivityRegistry::GetAppActivityAt(size_t index) {
-  if (index >= activity_list_.size())
-    return NULL;
-  return activity_list_[index];
-}
-
-void AppActivityRegistry::Unload() {
-  CHECK(!unloaded_activity_proxy_);
-  DCHECK(!activity_list_.empty());
-
-  // In order to allow an entire application to unload we require that all of
-  // its activities are marked as unloaded.
-  for (std::vector<AppActivity*>::iterator it = activity_list_.begin();
-       it != activity_list_.end(); ++it) {
-    if ((*it)->GetCurrentState() != Activity::ACTIVITY_UNLOADED)
-      return;
-  }
-
-  // Create an activity proxy which can be used to re-activate the app. Insert
-  // the proxy then into the activity stream at the location of the (newest)
-  // current activity.
-  unloaded_activity_proxy_ =
-      new AppActivityProxy(activity_list_[0]->GetActivityViewModel(), this);
-  ActivityManager::Get()->AddActivity(unloaded_activity_proxy_);
-  // The new activity should be in the place of the most recently used app
-  // window. To get it there, we get the most recently used application window
-  // and place the proxy activities window in front or behind, so that when the
-  // activity disappears it takes its place.
-  MoveBeforeMruApplicationWindow(unloaded_activity_proxy_->GetWindow());
-
-  // Unload the application. This operation will be asynchronous.
-  if (!AppRegistry::Get()->GetDelegate()->UnloadApplication(app_id_,
-                                                            browser_context_)) {
-    while(!activity_list_.empty())
-      delete activity_list_.back();
-  }
-}
-
-void AppActivityRegistry::ProxyDestroyed(AppActivityProxy* proxy) {
-  DCHECK_EQ(unloaded_activity_proxy_, proxy);
-  unloaded_activity_proxy_ = NULL;
-  if (activity_list_.empty()) {
-    AppRegistry::Get()->RemoveAppActivityRegistry(this);
-    // |This| is gone now.
-  }
-}
-
-void AppActivityRegistry::RestartApplication(AppActivityProxy* proxy) {
-  DCHECK_EQ(unloaded_activity_proxy_, proxy);
-  // Restart the application.
-  AppRegistry::Get()->GetDelegate()->RestartApplication(app_id_,
-                                                        browser_context_);
-  // Remove the activity from the Activity manager.
-  ActivityManager::Get()->RemoveActivity(unloaded_activity_proxy_);
-  delete unloaded_activity_proxy_;  // Will call ProxyDestroyed.
-  // After this call |this| might be gone if the app did not open a window yet.
-}
-
-void AppActivityRegistry::MoveBeforeMruApplicationWindow(aura::Window* window) {
-  DCHECK(activity_list_.size());
-  // TODO(skuhne): This needs to be changed to some kind of delegate which
-  // resides in the window manager.
-  const aura::Window::Windows children =
-      activity_list_[0]->GetWindow()->parent()->children();;
-  // Find the first window in the container which is part of the application.
-  for (aura::Window::Windows::const_iterator child_iterator = children.begin();
-      child_iterator != children.end(); ++child_iterator) {
-    for (std::vector<AppActivity*>::iterator app_iterator =
-             activity_list_.begin();
-         app_iterator != activity_list_.end(); ++app_iterator) {
-      if (*child_iterator == (*app_iterator)->GetWindow()) {
-        // Since "StackChildBelow" does not change the order if the window
-        // if the window is below - but not immediately behind - the target
-        // window, we re-stack both ways.
-        window->parent()->StackChildBelow(window, *child_iterator);
-        window->parent()->StackChildBelow(*child_iterator, window);
-        return;
-      }
-    }
-  }
-  NOTREACHED() << "The application does not get tracked by the mru list";
-}
-
-}  // namespace athena