Mercurial > addons > firefox-addons > feed-preview

annotate js/feed-preview.js @ 31:76e23b361e92

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Allow feed reader addons to subscribe to the currently viewed feed Add a link element to the feed preview that points to the currently viewed feed in order to allow feed reader addons to subscribe to it.
author Guido Berhoerster <guido+feed-preview@berhoerster.name>
date Tue, 22 Jan 2019 14:40:06 +0100
parents 688d75e554e0
children 4492db3b277e
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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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11 export function renderFeedPreview(feedPreviewDocument, feed,
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12 expandEntriesByDefault) {
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13 // inject XSL stylesheet which transforms XHTML to HTML allowing the use of
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14 // the HTML DOM
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15 let xslFilename = browser.runtime.getURL('web_resources/xhtml-to-html.xsl');
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16 let xmlStylesheetNode =
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17 feedPreviewDocument.createProcessingInstruction('xml-stylesheet',
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18 `type="application/xslt+xml" href="${xslFilename}"`);
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19 feedPreviewDocument.firstChild.after(xmlStylesheetNode);
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21 feedPreviewDocument.querySelector('#default-stylesheet').href =
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22 browser.runtime.getURL('web_resources/style/feed-preview.css');
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24 // link to the currently viewed feed in order to allow feed reader addons
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25 // to subscribe to it
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26 let feedLinkElement = feedPreviewDocument.querySelector('#feed-link');
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27 feedLinkElement.href = feed.url;
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28 feedLinkElement.type = feed.type;
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30 feedPreviewDocument.querySelector('title').textContent = feed.title;
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31
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32 feedPreviewDocument.querySelector('label[for="feed-reader-selection"]')
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33 .textContent = browser.i18n.getMessage('feedReaderSelectionLabel');
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34 feedPreviewDocument.querySelector('[name="subscribe"]').textContent =
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35 browser.i18n.getMessage('subscribeButtonLabel');
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37 feedPreviewDocument.querySelector('#feed-title').textContent = feed.title;
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38 feedPreviewDocument.querySelector('#feed-subtitle').textContent =
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39 feed.subtitle;
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40
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41 if (typeof feed.logo !== 'undefined') {
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42 let feedLogoTemplate =
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43 feedPreviewDocument.querySelector('#feed-logo-template');
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44 let logoNode = feedPreviewDocument.importNode(feedLogoTemplate.content,
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45 true);
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46 let imgElement = logoNode.querySelector('#feed-logo');
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47 imgElement.setAttribute('src', feed.logo.url);
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48 imgElement.setAttribute('alt', feed.logo.title);
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49 feedPreviewDocument.querySelector('#feed-header').prepend(logoNode);
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50 }
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52 feedPreviewDocument.querySelector("#no-entries-hint").textContent =
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53 browser.i18n.getMessage('noEntriesHint');
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54
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55 let entryTemplateElement =
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56 feedPreviewDocument.querySelector('#entry-template');
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57 let entryTitleTemplateElement =
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58 feedPreviewDocument.querySelector('#entry-title-template');
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59 let entryTitleLinkedTemplateElement =
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60 feedPreviewDocument.querySelector('#entry-title-linked-template');
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61 let entryFileListTemplateElement =
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62 feedPreviewDocument.querySelector('#entry-files-list-template');
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63 let entryFileTemplateElement =
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64 feedPreviewDocument.querySelector('#entry-file-template');
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65 for (let entry of feed.entries) {
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66 let entryNode =
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67 feedPreviewDocument.importNode(entryTemplateElement.content,
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68 true);
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69 entryNode.querySelector('details.entry').open = expandEntriesByDefault;
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70
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71 let titleElement;
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72 let titleNode;
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73 if (typeof entry.link !== 'undefined') {
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74 titleNode = feedPreviewDocument
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75 .importNode(entryTitleLinkedTemplateElement.content, true);
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76 titleElement = titleNode.querySelector('.entry-link');
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77 titleElement.href = entry.link;
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78 titleElement.title = entry.title;
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79 } else {
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80 titleNode = feedPreviewDocument
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81 .importNode(entryTitleTemplateElement.content, true);
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82 titleElement = titleNode.querySelector('.entry-title');
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83 }
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84 titleElement.textContent = entry.title;
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85 entryNode.querySelector('.entry-header').prepend(titleNode);
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86
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87 let timeElement = entryNode.querySelector('.entry-date > time');
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88 timeElement.textContent = entry.date.toLocaleString();
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89
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90 let contentElement = entryNode.querySelector('.entry-content');
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91 let contentDocument = new DOMParser().parseFromString(entry.content,
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92 'text/html');
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93 let stylesheetElement = contentDocument.createElement('link');
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94 stylesheetElement.rel = 'stylesheet';
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95 stylesheetElement.href =
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96 browser.runtime.getURL('web_resources/style/entry-content.css');
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97 contentDocument.head.appendChild(stylesheetElement);
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98 // open links in a new tab rather than within the iframe
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99 for (let linkElement of contentDocument.links) {
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100 linkElement.target = '_blank';
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101 }
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102 contentElement.srcdoc = new XMLSerializer()
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103 .serializeToString(contentDocument);
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104 contentElement.title = entry.title;
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105
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106 if (entry.files.length > 0) {
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107 let fileListNode = feedPreviewDocument
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108 .importNode(entryFileListTemplateElement.content, true);
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109 fileListNode.querySelector('.entry-files-title').textContent =
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110 browser.i18n.getMessage('filesTitle');
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111 let fileListElement =
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112 fileListNode.querySelector('.entry-files-list');
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113
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114 for (let file of entry.files) {
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115 let fileNode = feedPreviewDocument
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116 .importNode(entryFileTemplateElement.content, true);
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117
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118 let fileLinkElement =
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119 fileNode.querySelector('.entry-file-link');
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120 fileLinkElement.href = file.url;
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121 fileLinkElement.title = file.filename;
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122 fileLinkElement.textContent = file.filename;
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123
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124 fileNode.querySelector('.entry-file-info').textContent =
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125 `(${file.type}, ${file.size} bytes)`;
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126
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127 fileListElement.appendChild(fileNode);
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128 }
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129
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130 entryNode.querySelector('.entry').append(fileListNode);
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131 }
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132
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133 feedPreviewDocument.body.append(entryNode);
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134 }
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135 }