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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef COMPONENTS_VIEW_MANAGER_IDS_H_ | 5 #ifndef COMPONENTS_VIEW_MANAGER_IDS_H_ |
6 #define COMPONENTS_VIEW_MANAGER_IDS_H_ | 6 #define COMPONENTS_VIEW_MANAGER_IDS_H_ |
7 | 7 |
8 #include "components/view_manager/public/cpp/types.h" | 8 #include "components/view_manager/public/cpp/types.h" |
9 #include "components/view_manager/public/cpp/util.h" | 9 #include "components/view_manager/public/cpp/util.h" |
10 | 10 |
11 namespace view_manager { | 11 namespace view_manager { |
12 | 12 |
13 // Connection id is used to indicate no connection. That is, no | 13 // Connection id is used to indicate no connection. That is, no ViewTreeImpl |
14 // ViewManagerServiceImpl ever gets this id. | 14 // ever gets this id. |
15 const mojo::ConnectionSpecificId kInvalidConnectionId = 0; | 15 const mojo::ConnectionSpecificId kInvalidConnectionId = 0; |
16 | 16 |
17 // Adds a bit of type safety to view ids. | 17 // Adds a bit of type safety to view ids. |
18 struct ViewId { | 18 struct ViewId { |
19 ViewId(mojo::ConnectionSpecificId connection_id, | 19 ViewId(mojo::ConnectionSpecificId connection_id, |
20 mojo::ConnectionSpecificId view_id) | 20 mojo::ConnectionSpecificId view_id) |
21 : connection_id(connection_id), view_id(view_id) {} | 21 : connection_id(connection_id), view_id(view_id) {} |
22 ViewId() : connection_id(0), view_id(0) {} | 22 ViewId() : connection_id(0), view_id(0) {} |
23 | 23 |
24 bool operator==(const ViewId& other) const { | 24 bool operator==(const ViewId& other) const { |
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54 } | 54 } |
55 | 55 |
56 // Returns a root view id with a given index offset. | 56 // Returns a root view id with a given index offset. |
57 inline ViewId RootViewId(uint16_t index) { | 57 inline ViewId RootViewId(uint16_t index) { |
58 return ViewId(kInvalidConnectionId, 2 + index); | 58 return ViewId(kInvalidConnectionId, 2 + index); |
59 } | 59 } |
60 | 60 |
61 } // namespace view_manager | 61 } // namespace view_manager |
62 | 62 |
63 #endif // COMPONENTS_VIEW_MANAGER_IDS_H_ | 63 #endif // COMPONENTS_VIEW_MANAGER_IDS_H_ |
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