mirror of
https://github.com/gorhill/uBlock.git
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127 lines
4.8 KiB
JavaScript
127 lines
4.8 KiB
JavaScript
/*******************************************************************************
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uBlock Origin - a browser extension to block requests.
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Copyright (C) 2015-present Raymond Hill
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see {http://www.gnu.org/licenses/}.
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Home: https://github.com/gorhill/uBlock
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*/
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'use strict';
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/******************************************************************************/
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// Scriptlets to count the number of script tags in a document.
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(( ) => {
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if ( typeof vAPI !== 'object' ) { return; }
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const t0 = Date.now();
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if ( vAPI.domSurveyScripts instanceof Object === false ) {
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vAPI.domSurveyScripts = {
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busy: false,
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scriptCount: -1,
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surveyTime: t0,
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};
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}
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const surveyResults = vAPI.domSurveyScripts;
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if ( surveyResults.busy ) { return; }
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surveyResults.busy = true;
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if ( surveyResults.surveyTime < vAPI.domMutationTime ) {
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surveyResults.scriptCount = -1;
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}
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surveyResults.surveyTime = t0;
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if ( surveyResults.scriptCount === -1 ) {
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const reInlineScript = /^(data:|blob:|$)/;
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let inlineScriptCount = 0;
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let scriptCount = 0;
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for ( const script of document.scripts ) {
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if ( reInlineScript.test(script.src) ) {
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inlineScriptCount = 1;
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continue;
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}
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scriptCount += 1;
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if ( scriptCount === 99 ) { break; }
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}
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scriptCount += inlineScriptCount;
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if ( scriptCount !== 0 ) {
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surveyResults.scriptCount = scriptCount;
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}
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}
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// https://github.com/uBlockOrigin/uBlock-issues/issues/756
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// Keep trying to find inline script-like instances but only if we
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// have the time-budget to do so.
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if ( surveyResults.scriptCount === -1 ) {
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if ( document.querySelector('a[href^="javascript:"]') !== null ) {
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surveyResults.scriptCount = 1;
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}
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}
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// https://github.com/uBlockOrigin/uBlock-issues/issues/1756
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// Mind that there might be no body element.
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if ( surveyResults.scriptCount === -1 && document.body !== null ) {
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surveyResults.scriptCount = 0;
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const onHandlers = new Set([
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'onabort', 'onblur', 'oncancel', 'oncanplay',
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'oncanplaythrough', 'onchange', 'onclick', 'onclose',
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'oncontextmenu', 'oncuechange', 'ondblclick', 'ondrag',
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'ondragend', 'ondragenter', 'ondragexit', 'ondragleave',
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'ondragover', 'ondragstart', 'ondrop', 'ondurationchange',
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'onemptied', 'onended', 'onerror', 'onfocus',
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'oninput', 'oninvalid', 'onkeydown', 'onkeypress',
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'onkeyup', 'onload', 'onloadeddata', 'onloadedmetadata',
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'onloadstart', 'onmousedown', 'onmouseenter', 'onmouseleave',
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'onmousemove', 'onmouseout', 'onmouseover', 'onmouseup',
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'onwheel', 'onpause', 'onplay', 'onplaying',
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'onprogress', 'onratechange', 'onreset', 'onresize',
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'onscroll', 'onseeked', 'onseeking', 'onselect',
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'onshow', 'onstalled', 'onsubmit', 'onsuspend',
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'ontimeupdate', 'ontoggle', 'onvolumechange', 'onwaiting',
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'onafterprint', 'onbeforeprint', 'onbeforeunload', 'onhashchange',
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'onlanguagechange', 'onmessage', 'onoffline', 'ononline',
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'onpagehide', 'onpageshow', 'onrejectionhandled', 'onpopstate',
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'onstorage', 'onunhandledrejection', 'onunload',
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'oncopy', 'oncut', 'onpaste'
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]);
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const nodeIter = document.createNodeIterator(
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document.body,
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NodeFilter.SHOW_ELEMENT
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);
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for (;;) {
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const node = nodeIter.nextNode();
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if ( node === null ) { break; }
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if ( node.hasAttributes() === false ) { continue; }
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for ( const attr of node.getAttributeNames() ) {
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if ( onHandlers.has(attr) === false ) { continue; }
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surveyResults.scriptCount = 1;
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break;
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}
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}
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}
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surveyResults.busy = false;
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// IMPORTANT: This is returned to the injector, so this MUST be
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// the last statement.
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if ( surveyResults.scriptCount !== -1 ) {
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return surveyResults.scriptCount;
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}
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})();
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