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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: {type: String, value: '1'}, |
| 10 type: String, | |
| 11 value: '1' | |
| 12 }, | |
| 13 | 10 |
| 14 index: { | 11 index: {type: Number, observer: 'indexChanged'}, |
| 15 type: Number, | |
| 16 observer: 'indexChanged' | |
| 17 }, | |
| 18 | 12 |
| 19 pageLabels: { | 13 pageLabels: {type: Array, value: null, observer: 'pageLabelsChanged'} |
| 20 type: Array, | |
| 21 value: null, | |
| 22 observer: 'pageLabelsChanged' | |
| 23 } | |
| 24 }, | 14 }, |
| 25 | 15 |
| 26 /** @type {number|undefined} */ | 16 /** @type {number|undefined} */ |
| 27 timerId: undefined, | 17 timerId: undefined, |
| 28 | 18 |
| 29 /** @override */ | 19 /** @override */ |
| 30 ready: function() { | 20 ready: function() { |
| 31 var callback = this.fadeIn.bind(this, 2000); | 21 var callback = this.fadeIn.bind(this, 2000); |
| 32 window.addEventListener('scroll', function() { | 22 window.addEventListener('scroll', function() { |
| 33 requestAnimationFrame(callback); | 23 requestAnimationFrame(callback); |
| 34 }); | 24 }); |
| 35 }, | 25 }, |
| 36 | 26 |
| 37 initialFadeIn: function() { | 27 initialFadeIn: function() { |
| 38 this.fadeIn(6000); | 28 this.fadeIn(6000); |
| 39 }, | 29 }, |
| 40 | 30 |
| 41 /** @param {number} displayTime */ | 31 /** @param {number} displayTime */ |
| 42 fadeIn: function(displayTime) { | 32 fadeIn: function(displayTime) { |
| 43 var percent = window.scrollY / | 33 var percent = window.scrollY / |
| 44 (document.body.scrollHeight - | 34 (document.body.scrollHeight - document.documentElement.clientHeight); |
| 45 document.documentElement.clientHeight); | 35 this.style.top = |
| 46 this.style.top = percent * | 36 percent * (document.documentElement.clientHeight - this.offsetHeight) + |
| 47 (document.documentElement.clientHeight - this.offsetHeight) + 'px'; | 37 'px'; |
| 48 // <if expr="is_macosx"> | 38 // <if expr="is_macosx"> |
| 49 // On the Mac, if overlay scrollbars are enabled, prevent them from | 39 // On the Mac, if overlay scrollbars are enabled, prevent them from |
| 50 // overlapping the triangle. | 40 // overlapping the triangle. |
| 51 if (window.innerWidth == document.body.scrollWidth) | 41 if (window.innerWidth == document.body.scrollWidth) |
| 52 this.style.right = '16px'; | 42 this.style.right = '16px'; |
| 53 else | 43 else |
| 54 this.style.right = '0px'; | 44 this.style.right = '0px'; |
| 55 // </if> | 45 // </if> |
| 56 this.style.opacity = 1; | 46 this.style.opacity = 1; |
| 57 clearTimeout(this.timerId); | 47 clearTimeout(this.timerId); |
| 58 | 48 |
| 59 this.timerId = setTimeout(function() { | 49 this.timerId = setTimeout(function() { |
| 60 this.style.opacity = 0; | 50 this.style.opacity = 0; |
| 61 this.timerId = undefined; | 51 this.timerId = undefined; |
| 62 }.bind(this), displayTime); | 52 }.bind(this), displayTime); |
| 63 }, | 53 }, |
| 64 | 54 |
| 65 pageLabelsChanged: function() { | 55 pageLabelsChanged: function() { |
| 66 this.indexChanged(); | 56 this.indexChanged(); |
| 67 }, | 57 }, |
| 68 | 58 |
| 69 indexChanged: function() { | 59 indexChanged: function() { |
| 70 if (this.pageLabels) | 60 if (this.pageLabels) |
| 71 this.label = this.pageLabels[this.index]; | 61 this.label = this.pageLabels[this.index]; |
| 72 else | 62 else |
| 73 this.label = String(this.index + 1); | 63 this.label = String(this.index + 1); |
| 74 } | 64 } |
| 75 }); | 65 }); |
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