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mojo/services/view_manager/default_access_policy.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 "mojo/services/view_manager/default_access_policy.h"
+
+#include "mojo/services/view_manager/access_policy_delegate.h"
+#include "mojo/services/view_manager/server_view.h"
+
+namespace view_manager {
+
+DefaultAccessPolicy::DefaultAccessPolicy(
+    mojo::ConnectionSpecificId connection_id,
+    AccessPolicyDelegate* delegate)
+    : connection_id_(connection_id), delegate_(delegate) {
+}
+
+DefaultAccessPolicy::~DefaultAccessPolicy() {
+}
+
+bool DefaultAccessPolicy::CanRemoveViewFromParent(
+    const ServerView* view) const {
+  if (!WasCreatedByThisConnection(view))
+    return false;  // Can only unparent views we created.
+
+  return delegate_->IsRootForAccessPolicy(view->parent()->id()) ||
+         WasCreatedByThisConnection(view->parent());
+}
+
+bool DefaultAccessPolicy::CanAddView(const ServerView* parent,
+                                     const ServerView* child) const {
+  return WasCreatedByThisConnection(child) &&
+         (delegate_->IsRootForAccessPolicy(parent->id()) ||
+          (WasCreatedByThisConnection(parent) &&
+           !delegate_->IsViewRootOfAnotherConnectionForAccessPolicy(parent)));
+}
+
+bool DefaultAccessPolicy::CanReorderView(const ServerView* view,
+                                         const ServerView* relative_view,
+                                         mojo::OrderDirection direction) const {
+  return WasCreatedByThisConnection(view) &&
+         WasCreatedByThisConnection(relative_view);
+}
+
+bool DefaultAccessPolicy::CanDeleteView(const ServerView* view) const {
+  return WasCreatedByThisConnection(view);
+}
+
+bool DefaultAccessPolicy::CanGetViewTree(const ServerView* view) const {
+  return WasCreatedByThisConnection(view) ||
+         delegate_->IsRootForAccessPolicy(view->id());
+}
+
+bool DefaultAccessPolicy::CanDescendIntoViewForViewTree(
+    const ServerView* view) const {
+  return (WasCreatedByThisConnection(view) &&
+          !delegate_->IsViewRootOfAnotherConnectionForAccessPolicy(view)) ||
+      delegate_->IsRootForAccessPolicy(view->id());
+}
+
+bool DefaultAccessPolicy::CanEmbed(const ServerView* view) const {
+  return WasCreatedByThisConnection(view);
+}
+
+bool DefaultAccessPolicy::CanChangeViewVisibility(
+    const ServerView* view) const {
+  return WasCreatedByThisConnection(view) ||
+         delegate_->IsRootForAccessPolicy(view->id());
+}
+
+bool DefaultAccessPolicy::CanSetViewSurfaceId(const ServerView* view) const {
+  // Once a view embeds another app, the embedder app is no longer able to
+  // call SetViewSurfaceId() - this ability is transferred to the embedded app.
+  if (delegate_->IsViewRootOfAnotherConnectionForAccessPolicy(view))
+    return false;
+  return WasCreatedByThisConnection(view) ||
+         delegate_->IsRootForAccessPolicy(view->id());
+}
+
+bool DefaultAccessPolicy::CanSetViewBounds(const ServerView* view) const {
+  return WasCreatedByThisConnection(view);
+}
+
+bool DefaultAccessPolicy::CanSetViewProperties(const ServerView* view) const {
+  return WasCreatedByThisConnection(view);
+}
+
+bool DefaultAccessPolicy::ShouldNotifyOnHierarchyChange(
+    const ServerView* view,
+    const ServerView** new_parent,
+    const ServerView** old_parent) const {
+  if (!WasCreatedByThisConnection(view))
+    return false;
+
+  if (*new_parent && !WasCreatedByThisConnection(*new_parent) &&
+      !delegate_->IsRootForAccessPolicy((*new_parent)->id())) {
+    *new_parent = NULL;
+  }
+
+  if (*old_parent && !WasCreatedByThisConnection(*old_parent) &&
+      !delegate_->IsRootForAccessPolicy((*old_parent)->id())) {
+    *old_parent = NULL;
+  }
+  return true;
+}
+
+bool DefaultAccessPolicy::WasCreatedByThisConnection(
+    const ServerView* view) const {
+  return view->id().connection_id == connection_id_;
+}
+
+}  // namespace view_manager