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21 |
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22 | "use strict";
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23 |
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24 | Object.defineProperty(exports, "__esModule", {
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25 | value: true
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26 | });
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27 |
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28 | var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
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29 |
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30 | function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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31 |
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32 | var CLEANUP_TIMEOUT = 30000;
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33 | var RenderingStates = {
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34 | INITIAL: 0,
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35 | RUNNING: 1,
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36 | PAUSED: 2,
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37 | FINISHED: 3
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38 | };
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39 |
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40 | var PDFRenderingQueue = function () {
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41 | function PDFRenderingQueue() {
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42 | _classCallCheck(this, PDFRenderingQueue);
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43 |
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44 | this.pdfViewer = null;
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45 | this.pdfThumbnailViewer = null;
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46 | this.onIdle = null;
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47 | this.highestPriorityPage = null;
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48 | this.idleTimeout = null;
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49 | this.printing = false;
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50 | this.isThumbnailViewEnabled = false;
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51 | }
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52 |
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53 | _createClass(PDFRenderingQueue, [{
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54 | key: "setViewer",
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55 | value: function setViewer(pdfViewer) {
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56 | this.pdfViewer = pdfViewer;
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57 | }
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58 | }, {
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59 | key: "setThumbnailViewer",
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60 | value: function setThumbnailViewer(pdfThumbnailViewer) {
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61 | this.pdfThumbnailViewer = pdfThumbnailViewer;
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62 | }
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63 | }, {
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64 | key: "isHighestPriority",
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65 | value: function isHighestPriority(view) {
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66 | return this.highestPriorityPage === view.renderingId;
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67 | }
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68 | }, {
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69 | key: "renderHighestPriority",
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70 | value: function renderHighestPriority(currentlyVisiblePages) {
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71 | if (this.idleTimeout) {
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72 | clearTimeout(this.idleTimeout);
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73 | this.idleTimeout = null;
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74 | }
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75 | if (this.pdfViewer.forceRendering(currentlyVisiblePages)) {
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76 | return;
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77 | }
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78 | if (this.pdfThumbnailViewer && this.isThumbnailViewEnabled) {
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79 | if (this.pdfThumbnailViewer.forceRendering()) {
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80 | return;
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81 | }
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82 | }
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83 | if (this.printing) {
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84 | return;
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85 | }
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86 | if (this.onIdle) {
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87 | this.idleTimeout = setTimeout(this.onIdle.bind(this), CLEANUP_TIMEOUT);
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88 | }
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89 | }
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90 | }, {
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91 | key: "getHighestPriority",
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92 | value: function getHighestPriority(visible, views, scrolledDown) {
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93 | var visibleViews = visible.views;
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94 | var numVisible = visibleViews.length;
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95 | if (numVisible === 0) {
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96 | return false;
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97 | }
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98 | for (var i = 0; i < numVisible; ++i) {
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99 | var view = visibleViews[i].view;
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100 | if (!this.isViewFinished(view)) {
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101 | return view;
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102 | }
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103 | }
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104 | if (scrolledDown) {
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105 | var nextPageIndex = visible.last.id;
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106 | if (views[nextPageIndex] && !this.isViewFinished(views[nextPageIndex])) {
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107 | return views[nextPageIndex];
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108 | }
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109 | } else {
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110 | var previousPageIndex = visible.first.id - 2;
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111 | if (views[previousPageIndex] && !this.isViewFinished(views[previousPageIndex])) {
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112 | return views[previousPageIndex];
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113 | }
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114 | }
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115 | return null;
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116 | }
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117 | }, {
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118 | key: "isViewFinished",
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119 | value: function isViewFinished(view) {
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120 | return view.renderingState === RenderingStates.FINISHED;
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121 | }
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122 | }, {
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123 | key: "renderView",
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124 | value: function renderView(view) {
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125 | var _this = this;
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126 |
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127 | switch (view.renderingState) {
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128 | case RenderingStates.FINISHED:
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129 | return false;
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130 | case RenderingStates.PAUSED:
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131 | this.highestPriorityPage = view.renderingId;
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132 | view.resume();
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133 | break;
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134 | case RenderingStates.RUNNING:
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135 | this.highestPriorityPage = view.renderingId;
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136 | break;
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137 | case RenderingStates.INITIAL:
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138 | this.highestPriorityPage = view.renderingId;
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139 | var continueRendering = function continueRendering() {
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140 | _this.renderHighestPriority();
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141 | };
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142 | view.draw().then(continueRendering, continueRendering);
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143 | break;
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144 | }
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145 | return true;
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146 | }
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147 | }]);
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148 |
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149 | return PDFRenderingQueue;
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150 | }();
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151 |
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152 | exports.RenderingStates = RenderingStates;
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153 | exports.PDFRenderingQueue = PDFRenderingQueue; |
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