mus: move View Manager to components/mus/vm

components/mus/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 "components/mus/default_access_policy.h"
-
-#include "components/mus/access_policy_delegate.h"
-#include "components/mus/server_view.h"
-
-namespace mus {
-
-DefaultAccessPolicy::DefaultAccessPolicy(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()) ||
-         IsDescendantOfEmbedRoot(view);
-}
-
-bool DefaultAccessPolicy::CanDescendIntoViewForViewTree(
-    const ServerView* view) const {
-  return (WasCreatedByThisConnection(view) &&
-          !delegate_->IsViewRootOfAnotherConnectionForAccessPolicy(view)) ||
-         delegate_->IsRootForAccessPolicy(view->id()) ||
-         delegate_->IsDescendantOfEmbedRoot(view);
-}
-
-bool DefaultAccessPolicy::CanEmbed(const ServerView* view,
-                                   uint32_t policy_bitmask) const {
-  if (policy_bitmask != mojo::ViewTree::ACCESS_POLICY_DEFAULT)
-    return false;
-  return WasCreatedByThisConnection(view) ||
-         (delegate_->IsViewKnownForAccessPolicy(view) &&
-          IsDescendantOfEmbedRoot(view) &&
-          !delegate_->IsRootForAccessPolicy(view->id()));
-}
-
-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::CanSetViewTextInputState(
-    const ServerView* view) const {
-  return WasCreatedByThisConnection(view) ||
-         delegate_->IsRootForAccessPolicy(view->id());
-}
-
-bool DefaultAccessPolicy::CanSetFocus(const ServerView* view) const {
-  return WasCreatedByThisConnection(view) ||
-         delegate_->IsRootForAccessPolicy(view->id());
-}
-
-bool DefaultAccessPolicy::ShouldNotifyOnHierarchyChange(
-    const ServerView* view,
-    const ServerView** new_parent,
-    const ServerView** old_parent) const {
-  if (!WasCreatedByThisConnection(view) && !IsDescendantOfEmbedRoot(view) &&
-      (!*new_parent || !IsDescendantOfEmbedRoot(*new_parent)) &&
-      (!*old_parent || !IsDescendantOfEmbedRoot(*old_parent))) {
-    return false;
-  }
-
-  if (*new_parent && !WasCreatedByThisConnection(*new_parent) &&
-      !delegate_->IsRootForAccessPolicy((*new_parent)->id()) &&
-      !delegate_->IsDescendantOfEmbedRoot(*new_parent)) {
-    *new_parent = nullptr;
-  }
-
-  if (*old_parent && !WasCreatedByThisConnection(*old_parent) &&
-      !delegate_->IsRootForAccessPolicy((*old_parent)->id()) &&
-      !delegate_->IsDescendantOfEmbedRoot(*new_parent)) {
-    *old_parent = nullptr;
-  }
-  return true;
-}
-
-const ServerView* DefaultAccessPolicy::GetViewForFocusChange(
-    const ServerView* focused) {
-  if (WasCreatedByThisConnection(focused) ||
-      delegate_->IsRootForAccessPolicy(focused->id()))
-    return focused;
-  return nullptr;
-}
-
-bool DefaultAccessPolicy::WasCreatedByThisConnection(
-    const ServerView* view) const {
-  return view->id().connection_id == connection_id_;
-}
-
-bool DefaultAccessPolicy::IsDescendantOfEmbedRoot(
-    const ServerView* view) const {
-  return delegate_->IsDescendantOfEmbedRoot(view);
-}
-
-}  // namespace mus