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/*******************************************************************************
uBlock Origin - a comprehensive, efficient content blocker
Copyright (C) 2014-present Raymond Hill
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/}.
Home: https://github.com/gorhill/uBlock
*/
// Code below has been imported from uMatrix and modified to fit uBO:
// https://github.com/gorhill/uMatrix/blob/3f8794dd899a05e066c24066c6c0a2515d5c60d2/src/js/contentscript.js#L464-L531
'use strict';
/******************************************************************************/
// https://github.com/gorhill/uMatrix/issues/232
// Force `display` property, Firefox is still affected by the issue.
(( ) => {
const noscripts = document.querySelectorAll('noscript');
if ( noscripts.length === 0 ) { return; }
const reMetaContent = /^\s*(\d+)\s*;\s*url=(?:"([^"]+)"|'([^']+)'|(.+))/i;
const reSafeURL = /^https?:\/\//;
let redirectTimer;
const autoRefresh = function(root) {
const meta = root.querySelector('meta[http-equiv="refresh"][content]');
if ( meta === null ) { return; }
const match = reMetaContent.exec(meta.getAttribute('content'));
if ( match === null ) { return; }
const refreshURL = (match[2] || match[3] || match[4] || '').trim();
let url;
try {
url = new URL(refreshURL, document.baseURI);
} catch(ex) {
return;
}
if ( reSafeURL.test(url.href) === false ) { return; }
redirectTimer = setTimeout(( ) => {
location.assign(url.href);
},
parseInt(match[1], 10) * 1000 + 1
);
meta.parentNode.removeChild(meta);
};
const morphNoscript = function(from) {
if ( /^application\/(?:xhtml\+)?xml/.test(document.contentType) ) {
const to = document.createElement('span');
while ( from.firstChild !== null ) {
to.appendChild(from.firstChild);
}
return to;
}
const parser = new DOMParser();
const doc = parser.parseFromString(
'<span>' + from.textContent + '</span>',
'text/html'
);
return document.adoptNode(doc.querySelector('span'));
};
for ( const noscript of noscripts ) {
const parent = noscript.parentNode;
if ( parent === null ) { continue; }
const span = morphNoscript(noscript);
span.style.setProperty('display', 'inline', 'important');
if ( redirectTimer === undefined ) {
autoRefresh(span);
}
parent.replaceChild(span, noscript);
}
})();
/******************************************************************************/
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