components/view_manager/window_manager_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 "components/view_manager/window_manager_access_policy.h"
   6
   7 #include "components/view_manager/access_policy_delegate.h"
   8 #include "components/view_manager/server_view.h"
   9
  10 namespace view_manager {
  11
  12 // TODO(sky): document why this differs from default for each case. Maybe want
  13 // to subclass DefaultAccessPolicy.
  14
  15 WindowManagerAccessPolicy::WindowManagerAccessPolicy(
  16     mojo::ConnectionSpecificId connection_id,
  17     AccessPolicyDelegate* delegate)
  18     : connection_id_(connection_id), delegate_(delegate) {
  19 }
  20
  21 WindowManagerAccessPolicy::~WindowManagerAccessPolicy() {
  22 }
  23
  24 bool WindowManagerAccessPolicy::CanRemoveViewFromParent(
  25     const ServerView* view) const {
  26   return true;
  27 }
  28
  29 bool WindowManagerAccessPolicy::CanAddView(const ServerView* parent,
  30                                            const ServerView* child) const {
  31   return true;
  32 }
  33
  34 bool WindowManagerAccessPolicy::CanReorderView(
  35     const ServerView* view,
  36     const ServerView* relative_view,
  37     mojo::OrderDirection direction) const {
  38   return true;
  39 }
  40
  41 bool WindowManagerAccessPolicy::CanDeleteView(const ServerView* view) const {
  42   return view->id().connection_id == connection_id_;
  43 }
  44
  45 bool WindowManagerAccessPolicy::CanGetViewTree(const ServerView* view) const {
  46   return view->id() != ClonedViewId();
  47 }
  48
  49 bool WindowManagerAccessPolicy::CanDescendIntoViewForViewTree(
  50     const ServerView* view) const {
  51   return view->id() != ClonedViewId();
  52 }
  53
  54 bool WindowManagerAccessPolicy::CanEmbed(const ServerView* view) const {
  55   return view->id().connection_id == connection_id_ ||
  56          (view->allows_reembed() &&
  57           delegate_->IsViewKnownForAccessPolicy(view));
  58 }
  59
  60 bool WindowManagerAccessPolicy::CanChangeViewVisibility(
  61     const ServerView* view) const {
  62   // The WindowManager can change the visibility of the root too.
  63   return view->id().connection_id == connection_id_ ||
  64       (view->GetRoot() == view);
  65 }
  66
  67 bool WindowManagerAccessPolicy::CanSetViewSurfaceId(
  68     const ServerView* view) const {
  69   if (delegate_->IsViewRootOfAnotherConnectionForAccessPolicy(view))
  70     return false;
  71   return view->id().connection_id == connection_id_ ||
  72          (delegate_->IsRootForAccessPolicy(view->id()));
  73 }
  74
  75 bool WindowManagerAccessPolicy::CanSetViewBounds(const ServerView* view) const {
  76   return view->id().connection_id == connection_id_;
  77 }
  78
  79 bool WindowManagerAccessPolicy::CanSetViewProperties(
  80     const ServerView* view) const {
  81   return view->id().connection_id == connection_id_;
  82 }
  83
  84 bool WindowManagerAccessPolicy::CanSetFocus(const ServerView* view) const {
  85   return true;
  86 }
  87
  88 bool WindowManagerAccessPolicy::ShouldNotifyOnHierarchyChange(
  89     const ServerView* view,
  90     const ServerView** new_parent,
  91     const ServerView** old_parent) const {
  92   if (view->id() == ClonedViewId())
  93     return false;
  94
  95   // Notify if we've already told the window manager about the view, or if we've
  96   // already told the window manager about the parent. The later handles the
  97   // case of a view that wasn't parented to the root getting added to the root.
  98   return IsViewKnown(view) || (*new_parent && IsViewKnown(*new_parent));
  99 }
 100
 101 const ServerView* WindowManagerAccessPolicy::GetViewForFocusChange(
 102     const ServerView* focused) {
 103   return focused;
 104 }
 105
 106 bool WindowManagerAccessPolicy::IsViewKnown(const ServerView* view) const {
 107   return delegate_->IsViewKnownForAccessPolicy(view);
 108 }
 109
 110 }  // namespace view_manager