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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_MUS_IDS_H_ | 5 #ifndef COMPONENTS_MUS_IDS_H_ |
6 #define COMPONENTS_MUS_IDS_H_ | 6 #define COMPONENTS_MUS_IDS_H_ |
7 | 7 |
8 #include "components/mus/public/cpp/types.h" | 8 #include "components/mus/public/cpp/types.h" |
9 #include "components/mus/public/cpp/util.h" | 9 #include "components/mus/public/cpp/util.h" |
10 | 10 |
11 namespace view_manager { | 11 namespace mus { |
12 | 12 |
13 // Connection id is used to indicate no connection. That is, no ViewTreeImpl | 13 // Connection id is used to indicate no connection. That is, no ViewTreeImpl |
14 // ever gets this id. | 14 // ever gets this id. |
15 const mojo::ConnectionSpecificId kInvalidConnectionId = 0; | 15 const 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(ConnectionSpecificId connection_id, ConnectionSpecificId view_id) |
20 mojo::ConnectionSpecificId view_id) | |
21 : connection_id(connection_id), view_id(view_id) {} | 20 : connection_id(connection_id), view_id(view_id) {} |
22 ViewId() : connection_id(0), view_id(0) {} | 21 ViewId() : connection_id(0), view_id(0) {} |
23 | 22 |
24 bool operator==(const ViewId& other) const { | 23 bool operator==(const ViewId& other) const { |
25 return other.connection_id == connection_id && other.view_id == view_id; | 24 return other.connection_id == connection_id && other.view_id == view_id; |
26 } | 25 } |
27 | 26 |
28 bool operator!=(const ViewId& other) const { return !(*this == other); } | 27 bool operator!=(const ViewId& other) const { return !(*this == other); } |
29 | 28 |
30 mojo::ConnectionSpecificId connection_id; | 29 ConnectionSpecificId connection_id; |
31 mojo::ConnectionSpecificId view_id; | 30 ConnectionSpecificId view_id; |
32 }; | 31 }; |
33 | 32 |
34 inline ViewId ViewIdFromTransportId(mojo::Id id) { | 33 inline ViewId ViewIdFromTransportId(Id id) { |
35 return ViewId(mojo::HiWord(id), mojo::LoWord(id)); | 34 return ViewId(HiWord(id), LoWord(id)); |
36 } | 35 } |
37 | 36 |
38 inline mojo::Id ViewIdToTransportId(const ViewId& id) { | 37 inline Id ViewIdToTransportId(const ViewId& id) { |
39 return (id.connection_id << 16) | id.view_id; | 38 return (id.connection_id << 16) | id.view_id; |
40 } | 39 } |
41 | 40 |
42 // Returns a ViewId that is reserved to indicate no view. That is, no view will | 41 // Returns a ViewId that is reserved to indicate no view. That is, no view will |
43 // ever be created with this id. | 42 // ever be created with this id. |
44 inline ViewId InvalidViewId() { | 43 inline ViewId InvalidViewId() { |
45 return ViewId(kInvalidConnectionId, 0); | 44 return ViewId(kInvalidConnectionId, 0); |
46 } | 45 } |
47 | 46 |
48 // Returns a root view id with a given index offset. | 47 // Returns a root view id with a given index offset. |
49 inline ViewId RootViewId(uint16_t index) { | 48 inline ViewId RootViewId(uint16_t index) { |
50 return ViewId(kInvalidConnectionId, 2 + index); | 49 return ViewId(kInvalidConnectionId, 2 + index); |
51 } | 50 } |
52 | 51 |
53 } // namespace view_manager | 52 } // namespace mus |
54 | 53 |
55 #endif // COMPONENTS_MUS_IDS_H_ | 54 #endif // COMPONENTS_MUS_IDS_H_ |
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