mojo/services/view_manager/default_access_policy.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "mojo/services/view_manager/default_access_policy.h"
   6
   7 #include "mojo/services/view_manager/access_policy_delegate.h"
   8 #include "mojo/services/view_manager/node.h"
   9
  10 namespace mojo {
  11 namespace service {
  12
  13 DefaultAccessPolicy::DefaultAccessPolicy(ConnectionSpecificId connection_id,
  14                                          AccessPolicyDelegate* delegate)
  15     : connection_id_(connection_id),
  16       delegate_(delegate) {
  17 }
  18
  19 DefaultAccessPolicy::~DefaultAccessPolicy() {
  20 }
  21
  22 bool DefaultAccessPolicy::CanRemoveNodeFromParent(const Node* node) const {
  23   if (!WasCreatedByThisConnection(node))
  24     return false;  // Can only unparent nodes we created.
  25
  26   const Node* parent = node->GetParent();
  27   return IsNodeInRoots(parent) || WasCreatedByThisConnection(parent);
  28 }
  29
  30 bool DefaultAccessPolicy::CanAddNode(const Node* parent,
  31                                      const Node* child) const {
  32   return WasCreatedByThisConnection(child) &&
  33       (IsNodeInRoots(parent) ||
  34        (WasCreatedByThisConnection(parent) &&
  35         !delegate_->IsNodeRootOfAnotherConnectionForAccessPolicy(parent)));
  36 }
  37
  38 bool DefaultAccessPolicy::CanReorderNode(const Node* node,
  39                                          const Node* relative_node,
  40                                          OrderDirection direction) const {
  41   return WasCreatedByThisConnection(node) &&
  42       WasCreatedByThisConnection(relative_node);
  43 }
  44
  45 bool DefaultAccessPolicy::CanDeleteNode(const Node* node) const {
  46   return WasCreatedByThisConnection(node);
  47 }
  48
  49 bool DefaultAccessPolicy::CanGetNodeTree(const Node* node) const {
  50   return WasCreatedByThisConnection(node) || IsNodeInRoots(node);
  51 }
  52
  53 bool DefaultAccessPolicy::CanDescendIntoNodeForNodeTree(
  54     const Node* node) const {
  55   return WasCreatedByThisConnection(node) &&
  56       !delegate_->IsNodeRootOfAnotherConnectionForAccessPolicy(node);
  57 }
  58
  59 bool DefaultAccessPolicy::CanEmbed(const Node* node) const {
  60   return WasCreatedByThisConnection(node);
  61 }
  62
  63 bool DefaultAccessPolicy::CanChangeNodeVisibility(const Node* node) const {
  64   return WasCreatedByThisConnection(node) || IsNodeInRoots(node);
  65 }
  66
  67 bool DefaultAccessPolicy::CanSetNodeContents(const Node* node) const {
  68   // Once a node embeds another app, the embedder app is no longer able to
  69   // call SetNodeContents() - this ability is transferred to the embedded app.
  70   if (delegate_->IsNodeRootOfAnotherConnectionForAccessPolicy(node))
  71     return false;
  72   return WasCreatedByThisConnection(node) || IsNodeInRoots(node);
  73 }
  74
  75 bool DefaultAccessPolicy::CanSetNodeBounds(const Node* node) const {
  76   return WasCreatedByThisConnection(node);
  77 }
  78
  79 bool DefaultAccessPolicy::ShouldNotifyOnHierarchyChange(
  80     const Node* node,
  81     const Node** new_parent,
  82     const Node** old_parent) const {
  83   if (!WasCreatedByThisConnection(node))
  84     return false;
  85
  86   if (*new_parent && !WasCreatedByThisConnection(*new_parent) &&
  87       !IsNodeInRoots(*new_parent)) {
  88     *new_parent = NULL;
  89   }
  90
  91   if (*old_parent && !WasCreatedByThisConnection(*old_parent) &&
  92       !IsNodeInRoots(*old_parent)) {
  93     *old_parent = NULL;
  94   }
  95   return true;
  96 }
  97
  98 bool DefaultAccessPolicy::ShouldSendViewDeleted(const ViewId& view_id) const {
  99   return view_id.connection_id == connection_id_;
 100 }
 101
 102 bool DefaultAccessPolicy::IsNodeInRoots(const Node* node) const {
 103   return delegate_->GetRootsForAccessPolicy().count(
 104       NodeIdToTransportId(node->id())) > 0;
 105 }
 106
 107 }  // namespace service
 108 }  // namespace mojo