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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 Polymer({ | 5 Polymer({ |
6 is: 'viewer-page-indicator', | 6 is: 'viewer-page-indicator', |
7 | 7 |
8 properties: { | 8 properties: { |
9 label: { | 9 label: { |
10 type: String, | 10 type: String, |
11 value: '1' | 11 value: '1' |
12 }, | 12 }, |
13 | 13 |
14 index: { | 14 index: { |
15 type: Number, | 15 type: Number, |
16 observer: 'indexChanged' | 16 observer: 'indexChanged' |
17 }, | 17 }, |
18 | 18 |
19 pageLabels: { | 19 pageLabels: { |
20 type: Array, | 20 type: Array, |
21 value: null, | 21 value: null, |
22 observer: 'pageLabelsChanged' | 22 observer: 'pageLabelsChanged' |
23 } | 23 } |
24 }, | 24 }, |
25 | 25 |
| 26 /** @type {number|undefined} */ |
26 timerId: undefined, | 27 timerId: undefined, |
27 | 28 |
| 29 /** @override */ |
28 ready: function() { | 30 ready: function() { |
29 var callback = this.fadeIn.bind(this, 2000); | 31 var callback = this.fadeIn.bind(this, 2000); |
30 window.addEventListener('scroll', function() { | 32 window.addEventListener('scroll', function() { |
31 requestAnimationFrame(callback); | 33 requestAnimationFrame(callback); |
32 }); | 34 }); |
33 }, | 35 }, |
34 | 36 |
35 initialFadeIn: function() { | 37 initialFadeIn: function() { |
36 this.fadeIn(6000); | 38 this.fadeIn(6000); |
37 }, | 39 }, |
38 | 40 |
| 41 /** @param {number} displayTime */ |
39 fadeIn: function(displayTime) { | 42 fadeIn: function(displayTime) { |
40 var percent = window.scrollY / | 43 var percent = window.scrollY / |
41 (document.body.scrollHeight - | 44 (document.body.scrollHeight - |
42 document.documentElement.clientHeight); | 45 document.documentElement.clientHeight); |
43 this.style.top = percent * | 46 this.style.top = percent * |
44 (document.documentElement.clientHeight - this.offsetHeight) + 'px'; | 47 (document.documentElement.clientHeight - this.offsetHeight) + 'px'; |
45 // <if expr="is_macosx"> | 48 // <if expr="is_macosx"> |
46 // On the Mac, if overlay scrollbars are enabled, prevent them from | 49 // On the Mac, if overlay scrollbars are enabled, prevent them from |
47 // overlapping the triangle. | 50 // overlapping the triangle. |
48 if (window.innerWidth == document.body.scrollWidth) | 51 if (window.innerWidth == document.body.scrollWidth) |
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63 this.indexChanged(); | 66 this.indexChanged(); |
64 }, | 67 }, |
65 | 68 |
66 indexChanged: function() { | 69 indexChanged: function() { |
67 if (this.pageLabels) | 70 if (this.pageLabels) |
68 this.label = this.pageLabels[this.index]; | 71 this.label = this.pageLabels[this.index]; |
69 else | 72 else |
70 this.label = String(this.index + 1); | 73 this.label = String(this.index + 1); |
71 } | 74 } |
72 }); | 75 }); |
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