mozart: Initial commit of the view manager.

services/ui/view_manager/view_tree_host_impl.cc

+// Copyright 2015 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 "base/bind.h"
+#include "base/bind_helpers.h"
+#include "services/ui/view_manager/view_tree_host_impl.h"
+
+namespace view_manager {
+
+ViewTreeHostImpl::ViewTreeHostImpl(
+    ViewRegistry* registry,
+    ViewTreeState* state,
+    mojo::InterfaceRequest<mojo::ui::ViewTreeHost> view_tree_host_request)
+    : registry_(registry),
+      state_(state),
+      binding_(this, view_tree_host_request.Pass()) {}
+
+ViewTreeHostImpl::~ViewTreeHostImpl() {}
+
+void ViewTreeHostImpl::RequestLayout() {
+  registry_->RequestLayout(state_);
+}
+
+void ViewTreeHostImpl::SetRoot(uint32_t root_key,
+                               mojo::ui::ViewTokenPtr root_view_token) {
+  registry_->SetRoot(state_, root_key, root_view_token.Pass());
+}
+
+void ViewTreeHostImpl::ResetRoot() {
+  registry_->ResetRoot(state_);
+}
+
+static void RunLayoutRootCallback(
+    const ViewTreeHostImpl::LayoutRootCallback& callback,
+    mojo::ui::ViewLayoutInfoPtr info) {
+  callback.Run(info.Pass());
+}
+
+void ViewTreeHostImpl::LayoutRoot(
+    mojo::ui::ViewLayoutParamsPtr root_layout_params,
+    const LayoutRootCallback& callback) {
+  registry_->LayoutRoot(state_, root_layout_params.Pass(),
+                        base::Bind(&RunLayoutRootCallback, callback));
+}
+
+}  // namespace view_manager