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mojo/services/view_manager/connection_manager.cc

Index: mojo/services/view_manager/connection_manager.cc
diff --git a/mojo/services/view_manager/connection_manager.cc b/mojo/services/view_manager/connection_manager.cc
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+++ b/mojo/services/view_manager/connection_manager.cc
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+// 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 "mojo/services/view_manager/connection_manager.h"
+
+#include "base/logging.h"
+#include "base/stl_util.h"
+#include "mojo/converters/geometry/geometry_type_converters.h"
+#include "mojo/converters/input_events/input_events_type_converters.h"
+#include "mojo/public/interfaces/application/service_provider.mojom.h"
+#include "mojo/services/view_manager/client_connection.h"
+#include "mojo/services/view_manager/connection_manager_delegate.h"
+#include "mojo/services/view_manager/display_manager.h"
+#include "mojo/services/view_manager/server_view.h"
+#include "mojo/services/view_manager/view_coordinate_conversions.h"
+#include "mojo/services/view_manager/view_manager_service_impl.h"
+
+using mojo::ConnectionSpecificId;
+
+namespace view_manager {
+namespace {
+
+// Creates a copy of |view|. The copied view has |delegate| as its delegate.
+// This does not recurse.
+ServerView* CloneView(const ServerView* view, ServerViewDelegate* delegate) {
+  ServerView* clone = new ServerView(delegate, ClonedViewId());
+  clone->SetBounds(view->bounds());
+  clone->SetSurfaceId(view->surface_id());
+  clone->SetOpacity(view->opacity());
+  return clone;
+}
+
+// Creates copies of all the visible children of |parent|. Newly cloned views
+// are added to |cloned_parent| and have |delegate| as their delegate. The
+// stacking order of the cloned views is preseved.
+void CloneViewTree(const ServerView* parent,
+                   ServerView* cloned_parent,
+                   ServerViewDelegate* delegate) {
+  DCHECK(parent->visible());
+  for (const ServerView* to_clone : parent->GetChildren()) {
+    if (to_clone->visible()) {
+      ServerView* cloned = CloneView(to_clone, delegate);
+      cloned_parent->Add(cloned);
+      CloneViewTree(to_clone, cloned, delegate);
+    }
+  }
+}
+
+// Recurses through all the children of |view| moving any cloned views to
+// |new_parent| stacked above |stack_above|. |stack_above| is updated as views
+// are moved.
+void ReparentClonedViews(ServerView* new_parent,
+                         ServerView** stack_above,
+                         ServerView* view) {
+  if (view->id() == ClonedViewId()) {
+    const gfx::Rect new_bounds(ConvertRectBetweenViews(
+        view, new_parent, gfx::Rect(view->bounds().size())));
+    new_parent->Add(view);
+    new_parent->Reorder(view, *stack_above, mojo::ORDER_DIRECTION_ABOVE);
+    view->SetBounds(new_bounds);
+    *stack_above = view;
+    return;
+  }
+
+  for (ServerView* child : view->GetChildren())
+    ReparentClonedViews(new_parent, stack_above, child);
+}
+
+// Deletes |view| and all its descendants.
+void DeleteViewTree(ServerView* view) {
+  for (ServerView* child : view->GetChildren())
+    DeleteViewTree(child);
+
+  delete view;
+}
+
+// TODO(sky): nuke, proof of concept.
+bool DecrementAnimatingViewsOpacity(ServerView* view) {
+  if (view->id() == ClonedViewId()) {
+    const float new_opacity = view->opacity() - .05f;
+    if (new_opacity <= 0)
+      DeleteViewTree(view);
+    else
+      view->SetOpacity(new_opacity);
+    return true;
+  }
+  bool ret_value = false;
+  for (ServerView* child : view->GetChildren()) {
+    if (DecrementAnimatingViewsOpacity(child))
+      ret_value = true;
+  }
+  return ret_value;
+}
+
+}  // namespace
+
+ConnectionManager::ScopedChange::ScopedChange(
+    ViewManagerServiceImpl* connection,
+    ConnectionManager* connection_manager,
+    bool is_delete_view)
+    : connection_manager_(connection_manager),
+      connection_id_(connection->id()),
+      is_delete_view_(is_delete_view) {
+  connection_manager_->PrepareForChange(this);
+}
+
+ConnectionManager::ScopedChange::~ScopedChange() {
+  connection_manager_->FinishChange();
+}
+
+ConnectionManager::ConnectionManager(ConnectionManagerDelegate* delegate,
+                                     scoped_ptr<DisplayManager> display_manager,
+                                     mojo::WindowManagerInternal* wm_internal)
+    : delegate_(delegate),
+      window_manager_client_connection_(nullptr),
+      next_connection_id_(1),
+      display_manager_(display_manager.Pass()),
+      root_(new ServerView(this, RootViewId())),
+      wm_internal_(wm_internal),
+      current_change_(nullptr),
+      in_destructor_(false),
+      animation_runner_(base::TimeTicks::Now()) {
+  root_->SetBounds(gfx::Rect(800, 600));
+  root_->SetVisible(true);
+  display_manager_->Init(this);
+}
+
+ConnectionManager::~ConnectionManager() {
+  in_destructor_ = true;
+
+  STLDeleteValues(&connection_map_);
+  // All the connections should have been destroyed.
+  DCHECK(connection_map_.empty());
+  root_.reset();
+}
+
+ConnectionSpecificId ConnectionManager::GetAndAdvanceNextConnectionId() {
+  const ConnectionSpecificId id = next_connection_id_++;
+  DCHECK_LT(id, next_connection_id_);
+  return id;
+}
+
+void ConnectionManager::OnConnectionError(ClientConnection* connection) {
+  if (connection == window_manager_client_connection_) {
+    window_manager_client_connection_ = nullptr;
+    delegate_->OnLostConnectionToWindowManager();
+    // Assume we've been destroyed.
+    return;
+  }
+
+  scoped_ptr<ClientConnection> connection_owner(connection);
+
+  connection_map_.erase(connection->service()->id());
+
+  // Notify remaining connections so that they can cleanup.
+  for (auto& pair : connection_map_) {
+    pair.second->service()->OnWillDestroyViewManagerServiceImpl(
+        connection->service());
+  }
+}
+
+void ConnectionManager::EmbedAtView(
+    ConnectionSpecificId creator_id,
+    const std::string& url,
+    const ViewId& view_id,
+    mojo::InterfaceRequest<mojo::ServiceProvider> services,
+    mojo::ServiceProviderPtr exposed_services) {
+  std::string creator_url;
+  ConnectionMap::const_iterator it = connection_map_.find(creator_id);
+  if (it != connection_map_.end())
+    creator_url = it->second->service()->url();
+
+  mojo::ViewManagerServicePtr service_ptr;
+  ClientConnection* client_connection =
+      delegate_->CreateClientConnectionForEmbedAtView(
+          this, GetProxy(&service_ptr), creator_id, creator_url, url, view_id);
+  AddConnection(client_connection);
+  client_connection->service()->Init(client_connection->client(),
+                                     service_ptr.Pass(), services.Pass(),
+                                     exposed_services.Pass());
+  OnConnectionMessagedClient(client_connection->service()->id());
+}
+
+void ConnectionManager::EmbedAtView(mojo::ConnectionSpecificId creator_id,
+                                    const ViewId& view_id,
+                                    mojo::ViewManagerClientPtr client) {
+  std::string creator_url;
+  ConnectionMap::const_iterator it = connection_map_.find(creator_id);
+  if (it != connection_map_.end())
+    creator_url = it->second->service()->url();
+
+  mojo::ViewManagerServicePtr service_ptr;
+  ClientConnection* client_connection =
+      delegate_->CreateClientConnectionForEmbedAtView(
+          this, GetProxy(&service_ptr), creator_id, creator_url, view_id,
+          client.Pass());
+  AddConnection(client_connection);
+  client_connection->service()->Init(client_connection->client(),
+                                     service_ptr.Pass(), nullptr, nullptr);
+  OnConnectionMessagedClient(client_connection->service()->id());
+}
+
+ViewManagerServiceImpl* ConnectionManager::GetConnection(
+    ConnectionSpecificId connection_id) {
+  ConnectionMap::iterator i = connection_map_.find(connection_id);
+  return i == connection_map_.end() ? nullptr : i->second->service();
+}
+
+ServerView* ConnectionManager::GetView(const ViewId& id) {
+  if (id == root_->id())
+    return root_.get();
+  ViewManagerServiceImpl* service = GetConnection(id.connection_id);
+  return service ? service->GetView(id) : nullptr;
+}
+
+void ConnectionManager::OnConnectionMessagedClient(ConnectionSpecificId id) {
+  if (current_change_)
+    current_change_->MarkConnectionAsMessaged(id);
+}
+
+bool ConnectionManager::DidConnectionMessageClient(
+    ConnectionSpecificId id) const {
+  return current_change_ && current_change_->DidMessageConnection(id);
+}
+
+const ViewManagerServiceImpl* ConnectionManager::GetConnectionWithRoot(
+    const ViewId& id) const {
+  for (auto& pair : connection_map_) {
+    if (pair.second->service()->IsRoot(id))
+      return pair.second->service();
+  }
+  return nullptr;
+}
+
+void ConnectionManager::SetWindowManagerClientConnection(
+    scoped_ptr<ClientConnection> connection) {
+  CHECK(!window_manager_client_connection_);
+  window_manager_client_connection_ = connection.release();
+  AddConnection(window_manager_client_connection_);
+  window_manager_client_connection_->service()->Init(
+      window_manager_client_connection_->client(), nullptr, nullptr, nullptr);
+}
+
+mojo::ViewManagerClient*
+ConnectionManager::GetWindowManagerViewManagerClient() {
+  CHECK(window_manager_client_connection_);
+  return window_manager_client_connection_->client();
+}
+
+bool ConnectionManager::CloneAndAnimate(const ViewId& view_id) {
+  ServerView* view = GetView(view_id);
+  if (!view || !view->IsDrawn(root_.get()) || view == root_.get())
+    return false;
+  if (!animation_timer_.IsRunning()) {
+    animation_timer_.Start(FROM_HERE, base::TimeDelta::FromMilliseconds(100),
+                           this, &ConnectionManager::DoAnimation);
+  }
+  ServerView* clone = CloneView(view, this);
+  CloneViewTree(view, clone, this);
+  view->parent()->Add(clone);
+  view->parent()->Reorder(clone, view, mojo::ORDER_DIRECTION_ABOVE);
+  return true;
+}
+
+void ConnectionManager::ProcessViewBoundsChanged(const ServerView* view,
+                                                 const gfx::Rect& old_bounds,
+                                                 const gfx::Rect& new_bounds) {
+  for (auto& pair : connection_map_) {
+    pair.second->service()->ProcessViewBoundsChanged(
+        view, old_bounds, new_bounds, IsChangeSource(pair.first));
+  }
+}
+
+void ConnectionManager::ProcessViewportMetricsChanged(
+    const mojo::ViewportMetrics& old_metrics,
+    const mojo::ViewportMetrics& new_metrics) {
+  for (auto& pair : connection_map_) {
+    pair.second->service()->ProcessViewportMetricsChanged(
+        old_metrics, new_metrics, IsChangeSource(pair.first));
+  }
+}
+
+void ConnectionManager::ProcessWillChangeViewHierarchy(
+    const ServerView* view,
+    const ServerView* new_parent,
+    const ServerView* old_parent) {
+  for (auto& pair : connection_map_) {
+    pair.second->service()->ProcessWillChangeViewHierarchy(
+        view, new_parent, old_parent, IsChangeSource(pair.first));
+  }
+}
+
+void ConnectionManager::ProcessViewHierarchyChanged(
+    const ServerView* view,
+    const ServerView* new_parent,
+    const ServerView* old_parent) {
+  for (auto& pair : connection_map_) {
+    pair.second->service()->ProcessViewHierarchyChanged(
+        view, new_parent, old_parent, IsChangeSource(pair.first));
+  }
+}
+
+void ConnectionManager::ProcessViewReorder(
+    const ServerView* view,
+    const ServerView* relative_view,
+    const mojo::OrderDirection direction) {
+  for (auto& pair : connection_map_) {
+    pair.second->service()->ProcessViewReorder(view, relative_view, direction,
+                                               IsChangeSource(pair.first));
+  }
+}
+
+void ConnectionManager::ProcessViewDeleted(const ViewId& view) {
+  for (auto& pair : connection_map_) {
+    pair.second->service()->ProcessViewDeleted(view,
+                                               IsChangeSource(pair.first));
+  }
+}
+
+void ConnectionManager::PrepareForChange(ScopedChange* change) {
+  // Should only ever have one change in flight.
+  CHECK(!current_change_);
+  current_change_ = change;
+}
+
+void ConnectionManager::FinishChange() {
+  // PrepareForChange/FinishChange should be balanced.
+  CHECK(current_change_);
+  current_change_ = NULL;
+}
+
+void ConnectionManager::DoAnimation() {
+  if (!DecrementAnimatingViewsOpacity(root()))
+    animation_timer_.Stop();
+}
+
+void ConnectionManager::AddConnection(ClientConnection* connection) {
+  DCHECK_EQ(0u, connection_map_.count(connection->service()->id()));
+  connection_map_[connection->service()->id()] = connection;
+}
+
+void ConnectionManager::OnWillDestroyView(ServerView* view) {
+  if (!in_destructor_ && root_->Contains(view) && view != root_.get() &&
+      view->id() != ClonedViewId()) {
+    // We're about to destroy a view. Any cloned views need to be reparented
+    // else the animation would no longer be visible. By moving to a visible
+    // view, view->parent(), we ensure the animation is still visible.
+    ServerView* parent_above = view;
+    ReparentClonedViews(view->parent(), &parent_above, view);
+  }
+
+  animation_runner_.CancelAnimationForView(view);
+}
+
+void ConnectionManager::OnViewDestroyed(const ServerView* view) {
+  if (!in_destructor_)
+    ProcessViewDeleted(view->id());
+}
+
+void ConnectionManager::OnWillChangeViewHierarchy(ServerView* view,
+                                                  ServerView* new_parent,
+                                                  ServerView* old_parent) {
+  if (view->id() == ClonedViewId() || in_destructor_)
+    return;
+
+  if (root_->Contains(view) && view != root_.get()) {
+    // We're about to reparent a view. Any cloned views need to be reparented
+    // else the animation may be effected in unusual ways. For example, the view
+    // could move to a new location such that the animation is entirely clipped.
+    // By moving to view->parent() we ensure the animation is still visible.
+    ServerView* parent_above = view;
+    ReparentClonedViews(view->parent(), &parent_above, view);
+  }
+
+  ProcessWillChangeViewHierarchy(view, new_parent, old_parent);
+
+  animation_runner_.CancelAnimationForView(view);
+}
+
+void ConnectionManager::OnViewHierarchyChanged(const ServerView* view,
+                                               const ServerView* new_parent,
+                                               const ServerView* old_parent) {
+  if (in_destructor_)
+    return;
+
+  ProcessViewHierarchyChanged(view, new_parent, old_parent);
+
+  // TODO(beng): optimize.
+  if (old_parent) {
+    display_manager_->SchedulePaint(old_parent,
+                                    gfx::Rect(old_parent->bounds().size()));
+  }
+  if (new_parent) {
+    display_manager_->SchedulePaint(new_parent,
+                                    gfx::Rect(new_parent->bounds().size()));
+  }
+}
+
+void ConnectionManager::OnViewBoundsChanged(const ServerView* view,
+                                            const gfx::Rect& old_bounds,
+                                            const gfx::Rect& new_bounds) {
+  if (in_destructor_)
+    return;
+
+  ProcessViewBoundsChanged(view, old_bounds, new_bounds);
+  if (!view->parent())
+    return;
+
+  // TODO(sky): optimize this.
+  display_manager_->SchedulePaint(view->parent(), old_bounds);
+  display_manager_->SchedulePaint(view->parent(), new_bounds);
+}
+
+void ConnectionManager::OnViewSurfaceIdChanged(const ServerView* view) {
+  if (!in_destructor_)
+    display_manager_->SchedulePaint(view, gfx::Rect(view->bounds().size()));
+}
+
+void ConnectionManager::OnViewReordered(const ServerView* view,
+                                        const ServerView* relative,
+                                        mojo::OrderDirection direction) {
+  if (!in_destructor_)
+    display_manager_->SchedulePaint(view, gfx::Rect(view->bounds().size()));
+}
+
+void ConnectionManager::OnWillChangeViewVisibility(ServerView* view) {
+  if (in_destructor_)
+    return;
+
+  // Need to repaint if the view was drawn (which means it'll in the process of
+  // hiding) or the view is transitioning to drawn.
+  if (view->IsDrawn(root_.get()) || (!view->visible() && view->parent() &&
+                                     view->parent()->IsDrawn(root_.get()))) {
+    display_manager_->SchedulePaint(view->parent(), view->bounds());
+  }
+
+  if (view != root_.get() && view->id() != ClonedViewId() &&
+      root_->Contains(view) && view->IsDrawn(root_.get())) {
+    // We're about to hide |view|, this would implicitly make any cloned views
+    // hide to. Reparent so that animations are still visible.
+    ServerView* parent_above = view;
+    ReparentClonedViews(view->parent(), &parent_above, view);
+  }
+
+  for (auto& pair : connection_map_) {
+    pair.second->service()->ProcessWillChangeViewVisibility(
+        view, IsChangeSource(pair.first));
+  }
+
+  const bool is_parent_drawn =
+      view->parent() && view->parent()->IsDrawn(root_.get());
+  if (!is_parent_drawn || !view->visible())
+    animation_runner_.CancelAnimationForView(view);
+}
+
+void ConnectionManager::OnViewSharedPropertyChanged(
+    const ServerView* view,
+    const std::string& name,
+    const std::vector<uint8_t>* new_data) {
+  for (auto& pair : connection_map_) {
+    pair.second->service()->ProcessViewPropertyChanged(
+        view, name, new_data, IsChangeSource(pair.first));
+  }
+}
+
+void ConnectionManager::OnScheduleViewPaint(const ServerView* view) {
+  if (!in_destructor_)
+    display_manager_->SchedulePaint(view, gfx::Rect(view->bounds().size()));
+}
+
+void ConnectionManager::DispatchInputEventToView(mojo::Id transport_view_id,
+                                                 mojo::EventPtr event) {
+  const ViewId view_id(ViewIdFromTransportId(transport_view_id));
+
+  ViewManagerServiceImpl* connection = GetConnectionWithRoot(view_id);
+  if (!connection)
+    connection = GetConnection(view_id.connection_id);
+  if (connection) {
+    connection->client()->OnViewInputEvent(
+        transport_view_id, event.Pass(), base::Bind(&base::DoNothing));
+  }
+}
+
+void ConnectionManager::SetViewportSize(mojo::SizePtr size) {
+  gfx::Size new_size = size.To<gfx::Size>();
+  display_manager_->SetViewportSize(new_size);
+}
+
+void ConnectionManager::CloneAndAnimate(mojo::Id transport_view_id) {
+  CloneAndAnimate(ViewIdFromTransportId(transport_view_id));
+}
+
+}  // namespace view_manager