Mercurial > addons > firefox-addons > feed-preview

annotate content_scripts/feed-preview.js @ 4:086ee559acbb

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Remove unused parameter from xpathQuery and rename functions Remove unused xpathMapping parameter from xpathQuery. Rename xpathQuery to feedQueryXPath, xpathQueryAll to feedQueryXPathAll, and nsMapper to feedNSResolver which better reflects their purpose.
author Guido Berhoerster <guido+feed-preview@berhoerster.name>
date Sun, 04 Nov 2018 09:54:37 +0100
parents 1c31f4102408
children 341a0f4b7ce0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (C) 2018 Guido Berhoerster <guido+feed-preview@berhoerster.name>
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3 *
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4 * This Source Code Form is subject to the terms of the Mozilla Public
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5 * License, v. 2.0. If a copy of the MPL was not distributed with this
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6 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
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7 */
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8
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9 'use strict';
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10
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11 const ALLOWED_PROTOCOLS = new Set(['http:', 'https:', 'ftp:']);
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12
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13 function encodeXML(str) {
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14 return str.replace(/[<>&'"]/g, c => {
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15 switch (c) {
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16 case '<': return '&lt;';
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17 case '>': return '&gt;';
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18 case '&': return '&amp;';
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19 case '\'': return '&apos;';
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20 case '"': return '&quot;';
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21 }
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22 });
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23 }
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24
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25 function parseDate(s) {
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26 let date = new Date(s);
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27
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28 return isNaN(date) ? new Date(0) : date;
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29 }
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30
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31 function parseURL(text, baseURL = window.location.href) {
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32 let url;
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33
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34 try {
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35 url = new URL(text, baseURL);
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36 } catch (e) {
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37 return null;
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38 }
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39 if (!ALLOWED_PROTOCOLS.has(url.protocol)) {
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40 return null;
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41 }
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42
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43 return url;
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44 }
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45
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46 function normalizeHTML(text) {
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47 let parsedDocument = (new DOMParser()).parseFromString(text, 'text/html');
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48
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49 let linkElement = parsedDocument.createElement('link');
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50 linkElement.rel = 'stylesheet';
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51 linkElement.href ='style/entry-content.css';
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52 parsedDocument.head.appendChild(linkElement);
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53
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54 return (new XMLSerializer()).serializeToString(parsedDocument);
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55 }
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56
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57 function feedNSResolver(prefix) {
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58 switch (prefix) {
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59 case 'atom':
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60 return 'http://www.w3.org/2005/Atom'
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61 case 'rss':
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62 return 'http://my.netscape.com/rdf/simple/0.9/'
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63 }
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64 return null;
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65 }
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66
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67 function feedQueryXPath(feedDocument, scopeElement, xpathQuery) {
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68 return feedDocument.evaluate(xpathQuery, scopeElement, feedNSResolver,
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69 XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
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70 }
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71
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72 function feedQueryXPathAll(feedDocument, scopeElement, xpathQuery) {
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73 let result = feedDocument.evaluate(xpathQuery, scopeElement, feedNSResolver,
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74 XPathResult.ORDERED_NODE_ITERATOR_TYPE, null);
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75 let nodes = [];
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76 for (let node = result.iterateNext(); node !== null;
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77 node = result.iterateNext()) {
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78 nodes.push(node);
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79 }
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80
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81 return nodes;
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82 }
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83
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84 class FeedLogo {
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85 constructor(url, title = '') {
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86 this.url = url;
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87 this.title = title;
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88 }
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89 }
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90
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91 class RSS1Logo extends FeedLogo {
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92 constructor(feedDocument, imageElement) {
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93 let urlElement = feedQueryXPath(feedDocument, imageElement,
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94 './rss:url');
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95 if (urlElement === null) {
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96 throw new TypeError('missing <url> element in <logo> element');
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97 }
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98 let url = parseURL(urlElement.textContent.trim());
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99 if (url === null) {
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100 throw new TypeError('invalid URL in <logo> element');
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101 }
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102 super(url);
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103
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104 let titleElement = feedQueryXPath(feedDocument, imageElement,
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105 './rss:title');
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106 if (titleElement !== null) {
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107 this.title = titleElement.textContent.trim();
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108 }
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109 }
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110 }
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111
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112 class RSS2Logo extends FeedLogo {
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113 constructor(feedDocument, imageElement) {
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114 let urlElement = feedQueryXPath(feedDocument, imageElement, './url');
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115 if (urlElement === null) {
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116 throw new TypeError('missing <url> element in <logo> element');
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117 }
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118 let url = parseURL(urlElement.textContent.trim());
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119 if (url === null) {
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120 throw new TypeError('invalid URL in <logo> element');
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121 }
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122 super(url);
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123
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124 let titleElement = feedQueryXPath(feedDocument, imageElement,
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125 './title');
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126 if (titleElement !== null) {
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127 this.title = titleElement.textContent.trim();
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128 }
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129 }
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130 }
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131
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132 class AtomLogo extends FeedLogo {
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133 constructor(logoElement) {
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134 let url = parseURL(logoElement.textContent.trim());
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135 if (url === null) {
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136 throw new TypeError('invalid URL in <logo> element');
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137 }
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138 super(url);
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139 }
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140 }
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141
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142 class FeedEntryFile {
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143 constructor(url, type = browser.i18n.getMessage('defaultFileType'),
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144 size = 0) {
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145 this.url = url;
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146 let filename = url.pathname.split('/').pop();
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147 this.filename = filename !== '' ? filename :
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148 browser.i18n.getMessage('defaultFileName');
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149 this.type = type;
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150 this.size = size;
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151 }
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152 }
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153
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154 class RSS2EntryFile extends FeedEntryFile {
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155 constructor(enclosureElement) {
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156 let url = parseURL(enclosureElement.getAttribute('url'));
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157 if (url === null) {
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158 throw new TypeError('invalid URL in <enclosure> element');
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159 }
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160 super(url);
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161
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162 let type = enclosureElement.getAttribute('type');
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163 if (type !== null) {
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164 this.type = type;
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165 }
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166
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167 let size = parseInt(enclosureElement.getAttribute('length'), 10);
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168 if (!isNaN(size)) {
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169 this.size = size;
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170 }
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171 }
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172 }
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173
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174 class FeedEntry {
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175 constructor(title = browser.i18n.getMessage('defaultFeedEntryTitle'),
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176 url = null, date = new Date(0), content = '', files = []) {
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177 this.title = title;
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178 this.url = url;
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179 this.date = date;
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180 this.content = content;
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181 this.files = files;
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182 }
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183 }
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184
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185 class RSS1Entry extends FeedEntry {
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186 constructor(feedDocument, itemElement) {
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187 super();
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188
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189 let titleElement = feedQueryXPath(feedDocument, itemElement,
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190 './rss:title');
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191 if (titleElement !== null) {
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192 this.title = titleElement.textContent;
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193 }
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194
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195 let linkElement = feedQueryXPath(feedDocument, itemElement,
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196 './rss:link');
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197 if (linkElement !== null) {
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198 this.url = parseURL(linkElement.textContent);
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199 }
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200 }
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201 }
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202
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203 class RSS2Entry extends FeedEntry {
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204 constructor(feedDocument, itemElement) {
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205 super();
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206
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207 let titleElement = feedQueryXPath(feedDocument, itemElement, './title');
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208 if (titleElement !== null) {
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209 this.title = titleElement.textContent;
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210 }
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211
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212 let linkElement = feedQueryXPath(feedDocument, itemElement, './link');
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213 if (linkElement !== null) {
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214 this.url = parseURL(linkElement.textContent);
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215 }
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216
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217 let pubDateElement = feedQueryXPath(feedDocument, itemElement,
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218 './pubDate');
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219 if (pubDateElement !== null) {
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220 this.date = parseDate(pubDateElement.textContent);
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221 }
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222
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223 let descriptionElement = feedQueryXPath(feedDocument, itemElement,
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224 './description');
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225 if (descriptionElement !== null) {
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226 this.content = normalizeHTML(descriptionElement.textContent.trim());
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227 }
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228
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229 for (let enclosureElement of
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230 feedQueryXPathAll(feedDocument, itemElement, './enclosure')) {
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231 try {
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232 let entryFile = new RSS2EntryFile(enclosureElement);
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233 this.files.push(entryFile);
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234 } catch (e) {}
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235 }
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236 }
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237 }
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238
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239 class AtomEntry extends FeedEntry {
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240 constructor(feedDocument, entryElement) {
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241 super();
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242
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243 let titleElement = feedQueryXPath(feedDocument, entryElement,
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244 './atom:title');
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245 if (titleElement !== null) {
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246 this.title = titleElement.textContent.trim();
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247 }
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248
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249 let linkElement = feedQueryXPath(feedDocument, entryElement,
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250 './atom:link[@href][@rel="alternate"]');
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251 if (linkElement !== null) {
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252 this.url = parseURL(linkElement.getAttribute('href'));
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253 }
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254
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255 let updatedElement = feedQueryXPath(feedDocument, entryElement,
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256 './atom:updated');
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257 if (updatedElement !== null) {
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258 this.date = parseDate(updatedElement.textContent);
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259 }
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260
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261 let contentElement = feedQueryXPath(feedDocument, entryElement,
0
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262 './atom:content');
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263 if (contentElement === null) {
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264 contentElement = feedQueryXPath(feedDocument, entryElement,
0
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265 './atom:summary');
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266 }
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267 if (contentElement !== null) {
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268 let contentType = contentElement.getAttribute('type');
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269 if (contentType === null) {
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270 contentType = 'text';
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271 }
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272 contentType = contentType.toLowerCase();
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273 if (contentType === 'xhtml') {
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274 this.content = normalizeHTML(contentElement.innerHTML);
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275 } else if (contentType === 'html') {
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276 this.content = normalizeHTML(contentElement.textContent);
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277 } else {
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278 let encodedContent =
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279 encodeXML(contentElement.textContent.trim());
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280 this.content = normalizeHTML(`<pre>${encodedContent}</pre>`);
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281 }
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282 }
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283 }
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284 }
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285
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286 class Feed {
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287 constructor(title = browser.i18n.getMessage('defaultFeedTitle'),
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288 subtitle = '', logo = null, entries = []) {
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289 this.title = title;
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290 this.subtitle = subtitle;
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291 this.logo = logo;
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292 this.entries = entries;
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293 }
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294
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295 async createPreviewDocument() {
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296 let url = browser.extension.getURL('web_resources/feed-preview.xhtml');
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297 let response;
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298 let text;
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299 try {
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300 response = await fetch(url);
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301 text = await response.text();
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302 } catch (e) {
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303 console.log(`Error: failed to read preview template: ${e.message}`);
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304 return;
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305 }
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306 let previewDocument = (new DOMParser()).parseFromString(text,
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307 'application/xhtml+xml');
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308
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309 previewDocument.querySelector('base').href =
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310 browser.extension.getURL('web_resources/');
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311
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312 previewDocument.querySelector('title').textContent = this.title;
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313 previewDocument.querySelector('#feed-title').textContent = this.title;
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314 previewDocument.querySelector('#feed-subtitle').textContent =
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315 this.subtitle;
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316 if (this.logo !== null) {
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317 let feedLogoTemplate =
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318 previewDocument.querySelector('#feed-logo-template');
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319 let logoNode = previewDocument.importNode(feedLogoTemplate.content,
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320 true);
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321 let imgElement = logoNode.querySelector('#feed-logo');
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322 imgElement.setAttribute('src', this.logo.url);
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323 imgElement.setAttribute('alt', this.logo.title);
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324 previewDocument.querySelector('#feed-header').prepend(logoNode);
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325 }
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326
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327 let entryTemplateElement =
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328 previewDocument.querySelector('#entry-template');
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329 let entryTitleTemplateElement =
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330 previewDocument.querySelector('#entry-title-template');
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331 let entryTitleLinkedTemplateElement =
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332 previewDocument.querySelector('#entry-title-linked-template');
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333 let entryFileListTemplateElement =
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334 previewDocument.querySelector('#entry-files-list-template');
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335 let entryFileTemplateElement =
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336 previewDocument.querySelector('#entry-file-template');
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337 if (this.entries.length === 0) {
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338 let hintTemplateElement =
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339 previewDocument.querySelector('#no-entries-hint-template');
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340 let hintNode =
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341 previewDocument.importNode(hintTemplateElement.content,
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342 true);
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343 hintNode.querySelector("#no-entries-hint").textContent =
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344 browser.i18n.getMessage('noEntriesHint');
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345
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346 previewDocument.body.append(hintNode);
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347 }
0
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348 for (let entry of this.entries) {
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349 let entryNode =
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350 previewDocument.importNode(entryTemplateElement.content,
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351 true);
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352 let titleElement;
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353 let titleNode;
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354
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355 if (entry.url !== null) {
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356 titleNode = previewDocument
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357 .importNode(entryTitleLinkedTemplateElement.content,
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358 true);
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359 titleElement = titleNode.querySelector('.entry-link');
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360 titleElement.href = entry.url;
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361 titleElement.title = entry.title;
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362 } else {
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363 titleNode = previewDocument
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364 .importNode(entryTitleTemplateElement.content, true);
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365 titleElement = titleNode.querySelector('.entry-title');
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366 }
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367 titleElement.textContent = entry.title;
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368 entryNode.querySelector('.entry-header').prepend(titleNode);
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diff changeset
369
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370 let timeElement = entryNode.querySelector('.entry-date > time');
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371 timeElement.textContent = entry.date.toLocaleString();
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372
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373 let contentElement = entryNode.querySelector('.entry-content');
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374 contentElement.srcdoc = entry.content;
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375 contentElement.title = entry.title;
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376
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377 if (entry.files.length > 0) {
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378 let fileListNode = previewDocument
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379 .importNode(entryFileListTemplateElement.content, true);
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380 fileListNode.querySelector('.entry-files-title').textContent =
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381 browser.i18n.getMessage('filesTitle');
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382 let fileListElement =
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383 fileListNode.querySelector('.entry-files-list');
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diff changeset
384
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385 for (let file of entry.files) {
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386 let fileNode = previewDocument
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parents:
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387 .importNode(entryFileTemplateElement.content, true);
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diff changeset
388
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parents:
diff changeset
389 let fileLinkElement =
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parents:
diff changeset
390 fileNode.querySelector('.entry-file-link');
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diff changeset
391 fileLinkElement.href = file.url;
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diff changeset
392 fileLinkElement.title = file.filename;
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parents:
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393 fileLinkElement.textContent = file.filename;
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parents:
diff changeset
394
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diff changeset
395 fileNode.querySelector('.entry-file-info').textContent =
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diff changeset
396 `(${file.type}, ${file.size} bytes)`;
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diff changeset
397
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398 fileListElement.appendChild(fileNode);
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parents:
diff changeset
399 }
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parents:
diff changeset
400
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diff changeset
401 entryNode.querySelector('.entry').append(fileListNode);
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
402 }
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parents:
diff changeset
403
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
404 previewDocument.body.append(entryNode);
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
405 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
406
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
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diff changeset
407 return previewDocument;
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
408 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
409 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
410
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
411 class RSS1Feed extends Feed {
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
412 constructor(feedDocument) {
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
413 super();
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parents:
diff changeset
414
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diff changeset
415 let documentElement = feedDocument.documentElement;
4
086ee559acbb Remove unused parameter from xpathQuery and rename functions
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents: 1
diff changeset
416 let titleElement = feedQueryXPath(feedDocument, documentElement,
0
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
417 './rss:channel/rss:title');
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diff changeset
418 if (titleElement !== null) {
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419 this.title = titleElement.textContent;
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
420 }
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
421
4
086ee559acbb Remove unused parameter from xpathQuery and rename functions
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents: 1
diff changeset
422 let descriptionElement = feedQueryXPath(feedDocument, documentElement,
0
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
423 './channel/description');
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
424 if (descriptionElement !== null) {
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
425 this.subtitle = descriptionElement.textContent;
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
426 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
427
4
086ee559acbb Remove unused parameter from xpathQuery and rename functions
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents: 1
diff changeset
428 let imageElement = feedQueryXPath(feedDocument, documentElement,
0
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
429 './rss:image');
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
430 if (imageElement !== null) {
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
431 try {
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
432 let logo = new RSS1Logo(feedDocument, imageElement);
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
433 this.logo = logo;
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
434 } catch (e) {}
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
435 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
436
4
086ee559acbb Remove unused parameter from xpathQuery and rename functions
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents: 1
diff changeset
437 let itemElements = feedQueryXPathAll(feedDocument, documentElement,
0
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
438 './rss:item');
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
439 for (let itemElement of itemElements) {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
440 let entry = new RSS1Entry(feedDocument, itemElement);
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
441 if (typeof entry !== 'undefined') {
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
442 this.entries.push(entry);
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
443 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
444 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
445 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
446 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
447
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
448 class RSS2Feed extends Feed {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
449 constructor(feedDocument) {
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
450 super();
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
451
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
452 let documentElement = feedDocument.documentElement;
4
086ee559acbb Remove unused parameter from xpathQuery and rename functions
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents: 1
diff changeset
453 let titleElement = feedQueryXPath(feedDocument, documentElement,
0
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
454 './channel/title');
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
455 if (titleElement !== null) {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
456 this.title = titleElement.textContent;
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
457 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
458
4
086ee559acbb Remove unused parameter from xpathQuery and rename functions
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents: 1
diff changeset
459 let descriptionElement = feedQueryXPath(feedDocument, documentElement,
0
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
460 './channel/description');
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
461 if (descriptionElement !== null) {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
462 this.subtitle = descriptionElement.textContent;
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
463 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
464
4
086ee559acbb Remove unused parameter from xpathQuery and rename functions
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents: 1
diff changeset
465 let imageElement = feedQueryXPath(feedDocument, documentElement,
0
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
466 './channel/image');
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
467 if (imageElement !== null) {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
468 try {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
469 let logo = new RSS2Logo(feedDocument, imageElement);
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Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
470 this.logo = logo;
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
471 } catch (e) {}
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
472 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
473
4
086ee559acbb Remove unused parameter from xpathQuery and rename functions
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents: 1
diff changeset
474 let itemElements = feedQueryXPathAll(feedDocument, documentElement,
0
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
475 './channel/item');
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
476 for (let itemElement of itemElements) {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
477 let entry = new RSS2Entry(feedDocument, itemElement);
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
478 if (typeof entry !== 'undefined') {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
479 this.entries.push(entry);
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
480 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
481 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
482 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
483 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
484
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
485 class AtomFeed extends Feed {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
486 constructor(feedDocument, atomVersion) {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
487 super();
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
488
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
489 let documentElement = feedDocument.documentElement;
4
086ee559acbb Remove unused parameter from xpathQuery and rename functions
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents: 1
diff changeset
490 let titleElement = feedQueryXPath(feedDocument, documentElement,
0
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
491 './atom:title');
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
492 if (titleElement !== null) {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
493 this.title = titleElement.textContent.trim();
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
494 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
495
4
086ee559acbb Remove unused parameter from xpathQuery and rename functions
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents: 1
diff changeset
496 let subtitleElement = feedQueryXPath(feedDocument, documentElement,
0
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
497 './atom:subtitle');
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
498 if (subtitleElement !== null) {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
499 this.subtitle = subtitleElement.textContent.trim();
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
500 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
501
4
086ee559acbb Remove unused parameter from xpathQuery and rename functions
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents: 1
diff changeset
502 let logoElement = feedQueryXPath(feedDocument, documentElement,
0
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
503 './atom:logo');
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
504 if (logoElement !== null) {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
505 try {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
506 let logo = new AtomLogo(logoElement);
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
507 this.logo = logo;
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
508 } catch (e) {}
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
509 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
510
4
086ee559acbb Remove unused parameter from xpathQuery and rename functions
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents: 1
diff changeset
511 let entryElements = feedQueryXPathAll(feedDocument, documentElement,
0
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
512 './atom:entry');
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
513 for (let entryElement of entryElements) {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
514 this.entries.push(new AtomEntry(feedDocument, entryElement));
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
515 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
516 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
517 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
518
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
519 function probeFeedType(feedDocument) {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
520 if (feedDocument.documentElement.nodeName === 'feed') {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
521 let version = feedDocument.documentElement.getAttribute('version');
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
522 if (version === null) {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
523 version = '1.0';
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
524 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
525 for (let attr of feedDocument.documentElement.attributes) {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
526 if (attr.name === 'xmlns' &&
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
527 attr.value === 'http://www.w3.org/2005/Atom') {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
528 return ['atom', version];
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
529 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
530 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
531 } else if (feedDocument.documentElement.nodeName === 'rss') {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
532 let version = feedDocument.documentElement.getAttribute('version');
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
533 if (version !== null) {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
534 return ['rss', version];
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
535 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
536 } else if (feedDocument.documentElement.localName.toLowerCase() === 'rdf') {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
537 for (let attr of feedDocument.documentElement.attributes) {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
538 if (attr.name === 'xmlns' &&
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
539 attr.value === 'http://my.netscape.com/rdf/simple/0.9/') {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
540 return ['rss', '0.9'];
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
541 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
542 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
543 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
544
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
545 return [undefined, undefined];
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
546 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
547
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
548 async function replaceDocumentWithPreview(type, version) {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
549 let feed;
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
550 switch (type) {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
551 case 'rss':
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
552 switch (version) {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
553 case '0.9':
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
554 case '1.0':
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
555 feed = new RSS1Feed(document, version);
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
556 break;
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
557 case '0.90':
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
558 case '0.91':
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
559 case '0.92':
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
560 case '0.93':
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
561 case '0.94':
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
562 case '2.0':
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
563 feed = new RSS2Feed(document, version);
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
564 break;
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
565 default:
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
566 return;
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
567 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
568 break;
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
569 case 'atom':
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
570 feed = new AtomFeed(document, version);
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
571 break;
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
572 default:
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
573 return;
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
574 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
575
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
576 // replace original document with preview
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
577 let previewDocument = await feed.createPreviewDocument();
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
578 if (typeof previewDocument === 'undefined') {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
579 return;
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
580 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
581 let documentElement = previewDocument.documentElement;
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
582 document.replaceChild(document.importNode(documentElement, true),
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
583 document.documentElement);
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
584 }
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
585
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
586 let [type, version] = probeFeedType(document);
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
587 if (typeof type !== 'undefined') {
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
588 replaceDocumentWithPreview(type, version);
bc5cc170163c Initial revision
Guido Berhoerster <guido+feed-preview@berhoerster.name>
parents:
diff changeset
589 }