diff options
Diffstat (limited to 'lib/html_script_finder/web_labels/find_js_labels.js')
-rw-r--r-- | lib/html_script_finder/web_labels/find_js_labels.js | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/lib/html_script_finder/web_labels/find_js_labels.js b/lib/html_script_finder/web_labels/find_js_labels.js new file mode 100644 index 0000000..6404c49 --- /dev/null +++ b/lib/html_script_finder/web_labels/find_js_labels.js @@ -0,0 +1,131 @@ +/** + * GNU LibreJS - A browser add-on to block nonfree nontrivial JavaScript. + * * + * Copyright (C) 2011, 2012, 2013, 2014 Loic J. Duros + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + */ + +/** + * This file works in conjunction with lib/html_script_finder/js_web_labels.js + * to find mentions of external JavaScript files and their license information. + * This allows the dom_handler to allow them by default. + */ + +/** + * @param {Array} licenses - An array of html nodes. + * + * @return {Array} - An array of simple license objects. + */ +function getLicensesArrayFromElements(licenses) { + var a = []; + // Convert the html node into a simpler object + for (var i = 0; i < licenses.length; i++) { + a.push({ + licenseName: licenses[i].textContent, + licenseUrl: licenses[i].href + }); + } + return a; +} + +/** + * @param {Array} sources - An array of html nodes. + * + * @return {Array} - An array of simple source objects. + */ +function getSourcesArrayFromElements(sources) { + var a = []; + for (var i = 0; i < sources.length; i++) { + a.push({ + sourceName: sources[i].textContent, + sourceUrl: sources[i].href + }); + } + return a; +} + +// find table. +exports.getLicenseList = function(document) { + var tbl = document.getElementById('jslicense-labels1'); + var jsList = []; + var i = 0; + var le; + var rows; + var link; + var fileCell; + var licenseCell; + var sourceCell; + var row; + + if (tbl) { + try { + rows = tbl.getElementsByTagName('tr'); + le = rows.length; + var mockElem = {textContent: 'Unknown', href: 'Unknown'}; + // loop through rows, and add each valid element to + // the array. + for (; i < le; i++) { + row = rows[i].getElementsByTagName('td'); + + // Find script url + if (row[0] && row[0].getElementsByTagName('a')[0]) { + fileCell = row[0].getElementsByTagName('a')[0]; + } else { + fileCell = mockElem; + } + + // 'licenses' and 'sources' will, for normal cases, just + // contain one element. If the fileCell is pointing to a + // combined JS file with multiple licenses, though, these + // arrays will contain multiple elements. + + // Find license info + var licenses = [mockElem]; + if (row[1] && row[1].getElementsByTagName('a').length > 0) { + licenses = getLicensesArrayFromElements( + row[1].getElementsByTagName('a')); + } + + // Find original source info + var sources = [mockElem]; + if (row[2] && row[2].getElementsByTagName('a').length > 0) { + sources = getSourcesArrayFromElements( + row[2].getElementsByTagName('a')); + } + + if (fileCell.href !== 'Unknown') { + jsList.push({ + 'fileName': fileCell.textContent, + 'fileUrl': fileCell.href, + + // we'll fill this with value when needed to compare + // script. + 'fileHash': null, + + 'licenses': licenses, + 'sources': sources + }); + } + } + } catch (e) { + console.debug( + 'Error fetching JS Web Label licenses', + e, e.lineNumber, e.fileName, 'index is', i); + } + } + + return jsList; +}; |