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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 part of swarmlib; | 5 part of swarmlib; |
6 | 6 |
7 /** | 7 /** |
8 * The base class for UI state that intends to support browser history. | 8 * The base class for UI state that intends to support browser history. |
9 */ | 9 */ |
10 abstract class UIState { | 10 abstract class UIState { |
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53 void pushToHistory() { | 53 void pushToHistory() { |
54 if (_historyTracking == null) { | 54 if (_historyTracking == null) { |
55 throw 'history tracking not started'; | 55 throw 'history tracking not started'; |
56 } | 56 } |
57 | 57 |
58 String state = JSON.encode(toHistory()); | 58 String state = JSON.encode(toHistory()); |
59 | 59 |
60 // TODO(jmesserly): [state] should be an Object, and we should pass it to | 60 // TODO(jmesserly): [state] should be an Object, and we should pass it to |
61 // the state parameter instead of as a #hash URL. Right now we're working | 61 // the state parameter instead of as a #hash URL. Right now we're working |
62 // around b/4582542. | 62 // around b/4582542. |
63 window.history.pushState(null, | 63 window.history |
64 '${document.title}', '${document.title}#$state'); | 64 .pushState(null, '${document.title}', '${document.title}#$state'); |
65 } | 65 } |
66 | 66 |
67 /** | 67 /** |
68 * Serialize the state to a form suitable for storing in browser history. | 68 * Serialize the state to a form suitable for storing in browser history. |
69 */ | 69 */ |
70 Map<String, String> toHistory(); | 70 Map<String, String> toHistory(); |
71 | 71 |
72 /** | 72 /** |
73 * Load the UI state from the given [values]. | 73 * Load the UI state from the given [values]. |
74 */ | 74 */ |
75 void loadFromHistory(Map<String, String> values); | 75 void loadFromHistory(Map<String, String> values); |
76 } | 76 } |
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