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Issue 1344573002: Mandoline: Rename components/view_manager to components/mus (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Rebased Created 5 years, 3 months ago
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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/default_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 DefaultAccessPolicy::DefaultAccessPolicy(
13 mojo::ConnectionSpecificId connection_id,
14 AccessPolicyDelegate* delegate)
15 : connection_id_(connection_id), delegate_(delegate) {
16 }
17
18 DefaultAccessPolicy::~DefaultAccessPolicy() {
19 }
20
21 bool DefaultAccessPolicy::CanRemoveViewFromParent(
22 const ServerView* view) const {
23 if (!WasCreatedByThisConnection(view))
24 return false; // Can only unparent views we created.
25
26 return delegate_->IsRootForAccessPolicy(view->parent()->id()) ||
27 WasCreatedByThisConnection(view->parent());
28 }
29
30 bool DefaultAccessPolicy::CanAddView(const ServerView* parent,
31 const ServerView* child) const {
32 return WasCreatedByThisConnection(child) &&
33 (delegate_->IsRootForAccessPolicy(parent->id()) ||
34 (WasCreatedByThisConnection(parent) &&
35 !delegate_->IsViewRootOfAnotherConnectionForAccessPolicy(parent)));
36 }
37
38 bool DefaultAccessPolicy::CanReorderView(const ServerView* view,
39 const ServerView* relative_view,
40 mojo::OrderDirection direction) const {
41 return WasCreatedByThisConnection(view) &&
42 WasCreatedByThisConnection(relative_view);
43 }
44
45 bool DefaultAccessPolicy::CanDeleteView(const ServerView* view) const {
46 return WasCreatedByThisConnection(view);
47 }
48
49 bool DefaultAccessPolicy::CanGetViewTree(const ServerView* view) const {
50 return WasCreatedByThisConnection(view) ||
51 delegate_->IsRootForAccessPolicy(view->id()) ||
52 IsDescendantOfEmbedRoot(view);
53 }
54
55 bool DefaultAccessPolicy::CanDescendIntoViewForViewTree(
56 const ServerView* view) const {
57 return (WasCreatedByThisConnection(view) &&
58 !delegate_->IsViewRootOfAnotherConnectionForAccessPolicy(view)) ||
59 delegate_->IsRootForAccessPolicy(view->id()) ||
60 delegate_->IsDescendantOfEmbedRoot(view);
61 }
62
63 bool DefaultAccessPolicy::CanEmbed(const ServerView* view) const {
64 return WasCreatedByThisConnection(view) ||
65 (delegate_->IsViewKnownForAccessPolicy(view) &&
66 IsDescendantOfEmbedRoot(view) &&
67 !delegate_->IsRootForAccessPolicy(view->id()));
68 }
69
70 bool DefaultAccessPolicy::CanChangeViewVisibility(
71 const ServerView* view) const {
72 return WasCreatedByThisConnection(view) ||
73 delegate_->IsRootForAccessPolicy(view->id());
74 }
75
76 bool DefaultAccessPolicy::CanSetViewSurfaceId(const ServerView* view) const {
77 // Once a view embeds another app, the embedder app is no longer able to
78 // call SetViewSurfaceId() - this ability is transferred to the embedded app.
79 if (delegate_->IsViewRootOfAnotherConnectionForAccessPolicy(view))
80 return false;
81 return WasCreatedByThisConnection(view) ||
82 delegate_->IsRootForAccessPolicy(view->id());
83 }
84
85 bool DefaultAccessPolicy::CanSetViewBounds(const ServerView* view) const {
86 return WasCreatedByThisConnection(view);
87 }
88
89 bool DefaultAccessPolicy::CanSetViewProperties(const ServerView* view) const {
90 return WasCreatedByThisConnection(view);
91 }
92
93 bool DefaultAccessPolicy::CanSetViewTextInputState(
94 const ServerView* view) const {
95 return WasCreatedByThisConnection(view) ||
96 delegate_->IsRootForAccessPolicy(view->id());
97 }
98
99 bool DefaultAccessPolicy::CanSetFocus(const ServerView* view) const {
100 return WasCreatedByThisConnection(view) ||
101 delegate_->IsRootForAccessPolicy(view->id());
102 }
103
104 bool DefaultAccessPolicy::CanSetAccessPolicy(const ServerView* view) const {
105 return false;
106 }
107
108 bool DefaultAccessPolicy::ShouldNotifyOnHierarchyChange(
109 const ServerView* view,
110 const ServerView** new_parent,
111 const ServerView** old_parent) const {
112 if (!WasCreatedByThisConnection(view) && !IsDescendantOfEmbedRoot(view) &&
113 (!*new_parent || !IsDescendantOfEmbedRoot(*new_parent)) &&
114 (!*old_parent || !IsDescendantOfEmbedRoot(*old_parent))) {
115 return false;
116 }
117
118 if (*new_parent && !WasCreatedByThisConnection(*new_parent) &&
119 !delegate_->IsRootForAccessPolicy((*new_parent)->id()) &&
120 !delegate_->IsDescendantOfEmbedRoot(*new_parent)) {
121 *new_parent = nullptr;
122 }
123
124 if (*old_parent && !WasCreatedByThisConnection(*old_parent) &&
125 !delegate_->IsRootForAccessPolicy((*old_parent)->id()) &&
126 !delegate_->IsDescendantOfEmbedRoot(*new_parent)) {
127 *old_parent = nullptr;
128 }
129 return true;
130 }
131
132 const ServerView* DefaultAccessPolicy::GetViewForFocusChange(
133 const ServerView* focused) {
134 if (WasCreatedByThisConnection(focused) ||
135 delegate_->IsRootForAccessPolicy(focused->id()))
136 return focused;
137 return nullptr;
138 }
139
140 bool DefaultAccessPolicy::WasCreatedByThisConnection(
141 const ServerView* view) const {
142 return view->id().connection_id == connection_id_;
143 }
144
145 bool DefaultAccessPolicy::IsDescendantOfEmbedRoot(
146 const ServerView* view) const {
147 return delegate_->IsDescendantOfEmbedRoot(view);
148 }
149
150 } // namespace view_manager
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