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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 | |
5 /** | 4 /** |
6 * @constructor | 5 * @unrestricted |
7 * @param {number} timeout | |
8 */ | 6 */ |
9 WebInspector.Throttler = function(timeout) | 7 WebInspector.Throttler = class { |
10 { | 8 /** |
| 9 * @param {number} timeout |
| 10 */ |
| 11 constructor(timeout) { |
11 this._timeout = timeout; | 12 this._timeout = timeout; |
12 this._isRunningProcess = false; | 13 this._isRunningProcess = false; |
13 this._asSoonAsPossible = false; | 14 this._asSoonAsPossible = false; |
14 /** @type {?function():(!Promise.<?>)} */ | 15 /** @type {?function():(!Promise.<?>)} */ |
15 this._process = null; | 16 this._process = null; |
16 this._lastCompleteTime = 0; | 17 this._lastCompleteTime = 0; |
17 }; | 18 } |
18 | 19 |
19 WebInspector.Throttler.prototype = { | 20 _processCompleted() { |
20 _processCompleted: function() | 21 this._lastCompleteTime = window.performance.now(); |
21 { | 22 this._isRunningProcess = false; |
22 this._lastCompleteTime = window.performance.now(); | 23 if (this._process) |
23 this._isRunningProcess = false; | 24 this._innerSchedule(false); |
24 if (this._process) | 25 this._processCompletedForTests(); |
25 this._innerSchedule(false); | 26 } |
26 this._processCompletedForTests(); | |
27 }, | |
28 | 27 |
29 _processCompletedForTests: function() | 28 _processCompletedForTests() { |
30 { | 29 // For sniffing in tests. |
31 // For sniffing in tests. | 30 } |
32 }, | |
33 | 31 |
34 _onTimeout: function() | 32 _onTimeout() { |
35 { | 33 delete this._processTimeout; |
36 delete this._processTimeout; | 34 this._asSoonAsPossible = false; |
37 this._asSoonAsPossible = false; | 35 this._isRunningProcess = true; |
38 this._isRunningProcess = true; | |
39 | 36 |
40 Promise.resolve() | 37 Promise.resolve().then(this._process).catch(console.error.bind(console)).the
n(this._processCompleted.bind(this)); |
41 .then(this._process) | 38 this._process = null; |
42 .catch(console.error.bind(console)) | 39 } |
43 .then(this._processCompleted.bind(this)); | |
44 this._process = null; | |
45 }, | |
46 | 40 |
47 /** | 41 /** |
48 * @param {function():(!Promise.<?>)} process | 42 * @param {function():(!Promise.<?>)} process |
49 * @param {boolean=} asSoonAsPossible | 43 * @param {boolean=} asSoonAsPossible |
50 */ | 44 */ |
51 schedule: function(process, asSoonAsPossible) | 45 schedule(process, asSoonAsPossible) { |
52 { | 46 // Deliberately skip previous process. |
53 // Deliberately skip previous process. | 47 this._process = process; |
54 this._process = process; | |
55 | 48 |
56 // Run the first scheduled task instantly. | 49 // Run the first scheduled task instantly. |
57 var hasScheduledTasks = !!this._processTimeout || this._isRunningProcess
; | 50 var hasScheduledTasks = !!this._processTimeout || this._isRunningProcess; |
58 var okToFire = window.performance.now() - this._lastCompleteTime > this.
_timeout; | 51 var okToFire = window.performance.now() - this._lastCompleteTime > this._tim
eout; |
59 asSoonAsPossible = !!asSoonAsPossible || (!hasScheduledTasks && okToFire
); | 52 asSoonAsPossible = !!asSoonAsPossible || (!hasScheduledTasks && okToFire); |
60 | 53 |
61 var forceTimerUpdate = asSoonAsPossible && !this._asSoonAsPossible; | 54 var forceTimerUpdate = asSoonAsPossible && !this._asSoonAsPossible; |
62 this._asSoonAsPossible = this._asSoonAsPossible || asSoonAsPossible; | 55 this._asSoonAsPossible = this._asSoonAsPossible || asSoonAsPossible; |
63 | 56 |
64 this._innerSchedule(forceTimerUpdate); | 57 this._innerSchedule(forceTimerUpdate); |
65 }, | 58 } |
66 | 59 |
67 flush: function() | 60 flush() { |
68 { | 61 if (this._process) |
69 if (this._process) | 62 this._onTimeout(); |
70 this._onTimeout(); | 63 } |
71 }, | |
72 | 64 |
73 /** | 65 /** |
74 * @param {boolean} forceTimerUpdate | 66 * @param {boolean} forceTimerUpdate |
75 */ | 67 */ |
76 _innerSchedule: function(forceTimerUpdate) | 68 _innerSchedule(forceTimerUpdate) { |
77 { | 69 if (this._isRunningProcess) |
78 if (this._isRunningProcess) | 70 return; |
79 return; | 71 if (this._processTimeout && !forceTimerUpdate) |
80 if (this._processTimeout && !forceTimerUpdate) | 72 return; |
81 return; | 73 if (this._processTimeout) |
82 if (this._processTimeout) | 74 this._clearTimeout(this._processTimeout); |
83 this._clearTimeout(this._processTimeout); | |
84 | 75 |
85 var timeout = this._asSoonAsPossible ? 0 : this._timeout; | 76 var timeout = this._asSoonAsPossible ? 0 : this._timeout; |
86 this._processTimeout = this._setTimeout(this._onTimeout.bind(this), time
out); | 77 this._processTimeout = this._setTimeout(this._onTimeout.bind(this), timeout)
; |
87 }, | 78 } |
88 | 79 |
89 /** | 80 /** |
90 * @param {number} timeoutId | 81 * @param {number} timeoutId |
91 */ | 82 */ |
92 _clearTimeout: function(timeoutId) | 83 _clearTimeout(timeoutId) { |
93 { | 84 clearTimeout(timeoutId); |
94 clearTimeout(timeoutId); | 85 } |
95 }, | |
96 | 86 |
97 /** | 87 /** |
98 * @param {function()} operation | 88 * @param {function()} operation |
99 * @param {number} timeout | 89 * @param {number} timeout |
100 * @return {number} | 90 * @return {number} |
101 */ | 91 */ |
102 _setTimeout: function(operation, timeout) | 92 _setTimeout(operation, timeout) { |
103 { | 93 return setTimeout(operation, timeout); |
104 return setTimeout(operation, timeout); | 94 } |
105 } | |
106 }; | 95 }; |
107 | 96 |
108 /** @typedef {function(!Error=)} */ | 97 /** @typedef {function(!Error=)} */ |
109 WebInspector.Throttler.FinishCallback; | 98 WebInspector.Throttler.FinishCallback; |
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