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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 | exports.SimpleLinkService = exports.PDFLinkService = exports.LinkTarget = void 0;
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28 |
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29 | var _ui_utils = require("./ui_utils.js");
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30 |
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31 | const DEFAULT_LINK_REL = "noopener noreferrer nofollow";
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32 | const LinkTarget = {
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33 | NONE: 0,
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34 | SELF: 1,
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35 | BLANK: 2,
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36 | PARENT: 3,
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37 | TOP: 4
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38 | };
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39 | exports.LinkTarget = LinkTarget;
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40 |
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41 | function addLinkAttributes(link, {
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42 | url,
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43 | target,
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44 | rel,
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45 | enabled = true
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46 | } = {}) {
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47 | if (!url || typeof url !== "string") {
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48 | throw new Error('A valid "url" parameter must provided.');
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49 | }
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50 |
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51 | const urlNullRemoved = (0, _ui_utils.removeNullCharacters)(url);
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52 |
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53 | if (enabled) {
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54 | link.href = link.title = urlNullRemoved;
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55 | } else {
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56 | link.href = "";
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57 | link.title = `Disabled: ${urlNullRemoved}`;
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58 |
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59 | link.onclick = () => {
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60 | return false;
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61 | };
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62 | }
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63 |
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64 | let targetStr = "";
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65 |
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66 | switch (target) {
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67 | case LinkTarget.NONE:
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68 | break;
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69 |
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70 | case LinkTarget.SELF:
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71 | targetStr = "_self";
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72 | break;
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73 |
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74 | case LinkTarget.BLANK:
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75 | targetStr = "_blank";
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76 | break;
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77 |
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78 | case LinkTarget.PARENT:
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79 | targetStr = "_parent";
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80 | break;
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81 |
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82 | case LinkTarget.TOP:
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83 | targetStr = "_top";
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84 | break;
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85 | }
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86 |
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87 | link.target = targetStr;
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88 | link.rel = typeof rel === "string" ? rel : DEFAULT_LINK_REL;
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89 | }
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90 |
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91 | class PDFLinkService {
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92 | #pagesRefCache = new Map();
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93 |
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94 | constructor({
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95 | eventBus,
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96 | externalLinkTarget = null,
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97 | externalLinkRel = null,
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98 | ignoreDestinationZoom = false
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99 | } = {}) {
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100 | this.eventBus = eventBus;
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101 | this.externalLinkTarget = externalLinkTarget;
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102 | this.externalLinkRel = externalLinkRel;
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103 | this.externalLinkEnabled = true;
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104 | this._ignoreDestinationZoom = ignoreDestinationZoom;
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105 | this.baseUrl = null;
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106 | this.pdfDocument = null;
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107 | this.pdfViewer = null;
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108 | this.pdfHistory = null;
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109 | }
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110 |
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111 | setDocument(pdfDocument, baseUrl = null) {
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112 | this.baseUrl = baseUrl;
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113 | this.pdfDocument = pdfDocument;
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114 | this.#pagesRefCache.clear();
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115 | }
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116 |
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117 | setViewer(pdfViewer) {
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118 | this.pdfViewer = pdfViewer;
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119 | }
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120 |
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121 | setHistory(pdfHistory) {
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122 | this.pdfHistory = pdfHistory;
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123 | }
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124 |
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125 | get pagesCount() {
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126 | return this.pdfDocument ? this.pdfDocument.numPages : 0;
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127 | }
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128 |
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129 | get page() {
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130 | return this.pdfViewer.currentPageNumber;
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131 | }
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132 |
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133 | set page(value) {
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134 | this.pdfViewer.currentPageNumber = value;
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135 | }
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136 |
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137 | get rotation() {
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138 | return this.pdfViewer.pagesRotation;
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139 | }
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140 |
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141 | set rotation(value) {
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142 | this.pdfViewer.pagesRotation = value;
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143 | }
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144 |
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145 | #goToDestinationHelper(rawDest, namedDest = null, explicitDest) {
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146 | const destRef = explicitDest[0];
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147 | let pageNumber;
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148 |
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149 | if (typeof destRef === "object" && destRef !== null) {
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150 | pageNumber = this._cachedPageNumber(destRef);
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151 |
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152 | if (!pageNumber) {
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153 | this.pdfDocument.getPageIndex(destRef).then(pageIndex => {
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154 | this.cachePageRef(pageIndex + 1, destRef);
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155 | this.#goToDestinationHelper(rawDest, namedDest, explicitDest);
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156 | }).catch(() => {
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157 | console.error(`PDFLinkService.#goToDestinationHelper: "${destRef}" is not ` + `a valid page reference, for dest="${rawDest}".`);
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158 | });
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159 | return;
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160 | }
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161 | } else if (Number.isInteger(destRef)) {
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162 | pageNumber = destRef + 1;
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163 | } else {
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164 | console.error(`PDFLinkService.#goToDestinationHelper: "${destRef}" is not ` + `a valid destination reference, for dest="${rawDest}".`);
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165 | return;
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166 | }
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167 |
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168 | if (!pageNumber || pageNumber < 1 || pageNumber > this.pagesCount) {
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169 | console.error(`PDFLinkService.#goToDestinationHelper: "${pageNumber}" is not ` + `a valid page number, for dest="${rawDest}".`);
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170 | return;
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171 | }
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172 |
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173 | if (this.pdfHistory) {
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174 | this.pdfHistory.pushCurrentPosition();
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175 | this.pdfHistory.push({
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176 | namedDest,
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177 | explicitDest,
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178 | pageNumber
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179 | });
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180 | }
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181 |
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182 | this.pdfViewer.scrollPageIntoView({
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183 | pageNumber,
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184 | destArray: explicitDest,
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185 | ignoreDestinationZoom: this._ignoreDestinationZoom
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186 | });
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187 | }
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188 |
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189 | async goToDestination(dest) {
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190 | if (!this.pdfDocument) {
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191 | return;
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192 | }
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193 |
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194 | let namedDest, explicitDest;
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195 |
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196 | if (typeof dest === "string") {
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197 | namedDest = dest;
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198 | explicitDest = await this.pdfDocument.getDestination(dest);
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199 | } else {
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200 | namedDest = null;
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201 | explicitDest = await dest;
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202 | }
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203 |
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204 | if (!Array.isArray(explicitDest)) {
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205 | console.error(`PDFLinkService.goToDestination: "${explicitDest}" is not ` + `a valid destination array, for dest="${dest}".`);
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206 | return;
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207 | }
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208 |
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209 | this.#goToDestinationHelper(dest, namedDest, explicitDest);
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210 | }
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211 |
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212 | goToPage(val) {
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213 | if (!this.pdfDocument) {
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214 | return;
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215 | }
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216 |
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217 | const pageNumber = typeof val === "string" && this.pdfViewer.pageLabelToPageNumber(val) || val | 0;
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218 |
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219 | if (!(Number.isInteger(pageNumber) && pageNumber > 0 && pageNumber <= this.pagesCount)) {
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220 | console.error(`PDFLinkService.goToPage: "${val}" is not a valid page.`);
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221 | return;
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222 | }
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223 |
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224 | if (this.pdfHistory) {
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225 | this.pdfHistory.pushCurrentPosition();
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226 | this.pdfHistory.pushPage(pageNumber);
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227 | }
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228 |
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229 | this.pdfViewer.scrollPageIntoView({
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230 | pageNumber
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231 | });
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232 | }
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233 |
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234 | addLinkAttributes(link, url, newWindow = false) {
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235 | addLinkAttributes(link, {
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236 | url,
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237 | target: newWindow ? LinkTarget.BLANK : this.externalLinkTarget,
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238 | rel: this.externalLinkRel,
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239 | enabled: this.externalLinkEnabled
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240 | });
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241 | }
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242 |
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243 | getDestinationHash(dest) {
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244 | if (typeof dest === "string") {
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245 | if (dest.length > 0) {
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246 | return this.getAnchorUrl("#" + escape(dest));
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247 | }
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248 | } else if (Array.isArray(dest)) {
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249 | const str = JSON.stringify(dest);
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250 |
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251 | if (str.length > 0) {
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252 | return this.getAnchorUrl("#" + escape(str));
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253 | }
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254 | }
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255 |
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256 | return this.getAnchorUrl("");
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257 | }
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258 |
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259 | getAnchorUrl(anchor) {
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260 | return (this.baseUrl || "") + anchor;
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261 | }
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262 |
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263 | setHash(hash) {
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264 | if (!this.pdfDocument) {
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265 | return;
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266 | }
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267 |
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268 | let pageNumber, dest;
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269 |
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270 | if (hash.includes("=")) {
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271 | const params = (0, _ui_utils.parseQueryString)(hash);
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272 |
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273 | if (params.has("search")) {
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274 | this.eventBus.dispatch("findfromurlhash", {
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275 | source: this,
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276 | query: params.get("search").replace(/"/g, ""),
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277 | phraseSearch: params.get("phrase") === "true"
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278 | });
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279 | }
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280 |
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281 | if (params.has("page")) {
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282 | pageNumber = params.get("page") | 0 || 1;
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283 | }
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284 |
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285 | if (params.has("zoom")) {
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286 | const zoomArgs = params.get("zoom").split(",");
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287 | const zoomArg = zoomArgs[0];
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288 | const zoomArgNumber = parseFloat(zoomArg);
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289 |
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290 | if (!zoomArg.includes("Fit")) {
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291 | dest = [null, {
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292 | name: "XYZ"
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293 | }, zoomArgs.length > 1 ? zoomArgs[1] | 0 : null, zoomArgs.length > 2 ? zoomArgs[2] | 0 : null, zoomArgNumber ? zoomArgNumber / 100 : zoomArg];
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294 | } else {
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295 | if (zoomArg === "Fit" || zoomArg === "FitB") {
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296 | dest = [null, {
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297 | name: zoomArg
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298 | }];
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299 | } else if (zoomArg === "FitH" || zoomArg === "FitBH" || zoomArg === "FitV" || zoomArg === "FitBV") {
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300 | dest = [null, {
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301 | name: zoomArg
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302 | }, zoomArgs.length > 1 ? zoomArgs[1] | 0 : null];
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303 | } else if (zoomArg === "FitR") {
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304 | if (zoomArgs.length !== 5) {
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305 | console.error('PDFLinkService.setHash: Not enough parameters for "FitR".');
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306 | } else {
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307 | dest = [null, {
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308 | name: zoomArg
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309 | }, zoomArgs[1] | 0, zoomArgs[2] | 0, zoomArgs[3] | 0, zoomArgs[4] | 0];
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310 | }
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311 | } else {
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312 | console.error(`PDFLinkService.setHash: "${zoomArg}" is not a valid zoom value.`);
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313 | }
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314 | }
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315 | }
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316 |
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317 | if (dest) {
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318 | this.pdfViewer.scrollPageIntoView({
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319 | pageNumber: pageNumber || this.page,
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320 | destArray: dest,
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321 | allowNegativeOffset: true
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322 | });
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323 | } else if (pageNumber) {
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324 | this.page = pageNumber;
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325 | }
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326 |
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327 | if (params.has("pagemode")) {
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328 | this.eventBus.dispatch("pagemode", {
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329 | source: this,
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330 | mode: params.get("pagemode")
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331 | });
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332 | }
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333 |
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334 | if (params.has("nameddest")) {
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335 | this.goToDestination(params.get("nameddest"));
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336 | }
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337 | } else {
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338 | dest = unescape(hash);
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339 |
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340 | try {
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341 | dest = JSON.parse(dest);
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342 |
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343 | if (!Array.isArray(dest)) {
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344 | dest = dest.toString();
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345 | }
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346 | } catch (ex) {}
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347 |
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348 | if (typeof dest === "string" || PDFLinkService.#isValidExplicitDestination(dest)) {
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349 | this.goToDestination(dest);
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350 | return;
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351 | }
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352 |
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353 | console.error(`PDFLinkService.setHash: "${unescape(hash)}" is not a valid destination.`);
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354 | }
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355 | }
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356 |
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357 | executeNamedAction(action) {
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358 | switch (action) {
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359 | case "GoBack":
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360 | this.pdfHistory?.back();
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361 | break;
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362 |
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363 | case "GoForward":
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364 | this.pdfHistory?.forward();
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365 | break;
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366 |
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367 | case "NextPage":
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368 | this.pdfViewer.nextPage();
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369 | break;
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370 |
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371 | case "PrevPage":
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372 | this.pdfViewer.previousPage();
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373 | break;
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374 |
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375 | case "LastPage":
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376 | this.page = this.pagesCount;
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377 | break;
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378 |
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379 | case "FirstPage":
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380 | this.page = 1;
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381 | break;
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382 |
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383 | default:
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384 | break;
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385 | }
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386 |
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387 | this.eventBus.dispatch("namedaction", {
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388 | source: this,
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389 | action
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390 | });
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391 | }
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392 |
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393 | cachePageRef(pageNum, pageRef) {
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394 | if (!pageRef) {
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395 | return;
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396 | }
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397 |
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398 | const refStr = pageRef.gen === 0 ? `${pageRef.num}R` : `${pageRef.num}R${pageRef.gen}`;
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399 | this.#pagesRefCache.set(refStr, pageNum);
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400 | }
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401 |
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402 | _cachedPageNumber(pageRef) {
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403 | if (!pageRef) {
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404 | return null;
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405 | }
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406 |
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407 | const refStr = pageRef.gen === 0 ? `${pageRef.num}R` : `${pageRef.num}R${pageRef.gen}`;
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408 | return this.#pagesRefCache.get(refStr) || null;
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409 | }
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410 |
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411 | isPageVisible(pageNumber) {
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412 | return this.pdfViewer.isPageVisible(pageNumber);
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413 | }
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414 |
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415 | isPageCached(pageNumber) {
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416 | return this.pdfViewer.isPageCached(pageNumber);
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417 | }
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418 |
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419 | static #isValidExplicitDestination(dest) {
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420 | if (!Array.isArray(dest)) {
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421 | return false;
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422 | }
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423 |
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424 | const destLength = dest.length;
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425 |
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426 | if (destLength < 2) {
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427 | return false;
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428 | }
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429 |
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430 | const page = dest[0];
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431 |
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432 | if (!(typeof page === "object" && Number.isInteger(page.num) && Number.isInteger(page.gen)) && !(Number.isInteger(page) && page >= 0)) {
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433 | return false;
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434 | }
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435 |
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436 | const zoom = dest[1];
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437 |
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438 | if (!(typeof zoom === "object" && typeof zoom.name === "string")) {
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439 | return false;
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440 | }
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441 |
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442 | let allowNull = true;
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443 |
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444 | switch (zoom.name) {
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445 | case "XYZ":
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446 | if (destLength !== 5) {
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447 | return false;
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448 | }
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449 |
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450 | break;
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451 |
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452 | case "Fit":
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453 | case "FitB":
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454 | return destLength === 2;
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455 |
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456 | case "FitH":
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457 | case "FitBH":
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458 | case "FitV":
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459 | case "FitBV":
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460 | if (destLength !== 3) {
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461 | return false;
|
462 | }
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463 |
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464 | break;
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465 |
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466 | case "FitR":
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467 | if (destLength !== 6) {
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468 | return false;
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469 | }
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470 |
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471 | allowNull = false;
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472 | break;
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473 |
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474 | default:
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475 | return false;
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476 | }
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477 |
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478 | for (let i = 2; i < destLength; i++) {
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479 | const param = dest[i];
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480 |
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481 | if (!(typeof param === "number" || allowNull && param === null)) {
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482 | return false;
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483 | }
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484 | }
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485 |
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486 | return true;
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487 | }
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488 |
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489 | }
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490 |
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491 | exports.PDFLinkService = PDFLinkService;
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492 |
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493 | class SimpleLinkService {
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494 | constructor() {
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495 | this.externalLinkEnabled = true;
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496 | }
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497 |
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498 | get pagesCount() {
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499 | return 0;
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500 | }
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501 |
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502 | get page() {
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503 | return 0;
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504 | }
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505 |
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506 | set page(value) {}
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507 |
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508 | get rotation() {
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509 | return 0;
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510 | }
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511 |
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512 | set rotation(value) {}
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513 |
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514 | async goToDestination(dest) {}
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515 |
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516 | goToPage(val) {}
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517 |
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518 | addLinkAttributes(link, url, newWindow = false) {
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519 | addLinkAttributes(link, {
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520 | url,
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521 | enabled: this.externalLinkEnabled
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522 | });
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523 | }
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524 |
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525 | getDestinationHash(dest) {
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526 | return "#";
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527 | }
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528 |
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529 | getAnchorUrl(hash) {
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530 | return "#";
|
531 | }
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532 |
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533 | setHash(hash) {}
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534 |
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535 | executeNamedAction(action) {}
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536 |
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537 | cachePageRef(pageNum, pageRef) {}
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538 |
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539 | isPageVisible(pageNumber) {
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540 | return true;
|
541 | }
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542 |
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543 | isPageCached(pageNumber) {
|
544 | return true;
|
545 | }
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546 |
|
547 | }
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548 |
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549 | exports.SimpleLinkService = SimpleLinkService; |
\ | No newline at end of file |