mirror of
https://github.com/gorhill/uBlock.git
synced 2024-11-07 11:22:38 +01:00
gorhill
parent
63d27b1d25
commit
def2b7cbff
@ -19,7 +19,7 @@
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Home: https://github.com/gorhill/uBlock
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*/
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/* global CSS */
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/* global CSS, CSSImportRule, CSSStyleRule */
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/******************************************************************************/
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/******************************************************************************/
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@ -265,18 +265,59 @@ var highlightElements = function(elems, force) {
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/******************************************************************************/
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var removeElements = function(elems) {
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var i = elems.length, elem;
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var filterElements = function(filter) {
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var items = elementsFromFilter(filter);
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var i = items.length, item;
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while ( i-- ) {
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elem = elems[i];
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if ( elem.parentNode ) {
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elem.parentNode.removeChild(elem);
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item = items[i];
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if (
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item.type === 'cosmetic' ||
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item.type === 'network' && item.src !== undefined
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) {
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item.elem.style.setProperty('display', 'none', 'important');
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}
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if ( item.type === 'network' && item.style === 'background-image' ) {
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item.elem.style.setProperty('background-image', 'none', 'important');
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}
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}
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};
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/******************************************************************************/
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var urlFromCSSPropertyValue = function(value) {
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var matches = /^url\((["']?)([^"']+)\1\)$/.exec(value);
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return matches !== null && matches.length === 3 ? matches[2] : '';
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};
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/******************************************************************************/
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var backgroundImageURLFromElement = function(elem) {
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var style = window.getComputedStyle(elem);
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var bgImg = style.backgroundImage || '';
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return bgImg !== '' ? urlFromCSSPropertyValue(bgImg) : '';
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};
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/******************************************************************************/
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var resourceURLFromElement = function(elem) {
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var tagName = elem.localName, s;
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if ( (s = netFilter1stSources[tagName]) ) {
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s = elem[s];
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if ( typeof s === 'string' && s !== '' ) {
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return s;
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}
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}
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if ( (s = netFilter2ndSources[tagName]) ) {
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s = elem[s];
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if ( typeof s === 'string' && s !== '' ) {
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return s;
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}
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}
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return backgroundImageURLFromElement(elem);
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};
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/******************************************************************************/
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var netFilterFromUnion = (function() {
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var reTokenizer = /[^0-9a-z%*]+|[0-9a-z%]+|\*/gi;
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var a = document.createElement('a');
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@ -332,7 +373,10 @@ var netFilterFromUnion = (function() {
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}
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from = fromTokens.join('').replace(/\*\*+/g, '*');
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if ( from !== '/*' && from !== to ) {
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out.push('||' + lastNetFilterHostname + from);
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var filter = '||' + lastNetFilterHostname + from;
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if ( out.indexOf(filter) === -1 ) {
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out.push(filter);
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}
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} else {
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from = to;
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}
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@ -362,17 +406,11 @@ var netFilterFromElement = function(elem, out) {
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if ( elem.nodeType !== 1 ) {
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return;
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}
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var tagName = elem.tagName.toLowerCase();
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if ( netFilter1stSources.hasOwnProperty(tagName) === false ) {
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var src = resourceURLFromElement(elem);
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if ( src === '' ) {
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return;
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}
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var src = elem[netFilter1stSources[tagName]];
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if ( typeof src !== 'string' || src.length === 0 ) {
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src = elem[netFilter2ndSources[tagName]];
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if ( typeof src !== 'string' || src.length === 0 ) {
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return;
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}
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}
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// Remove fragment
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var pos = src.indexOf('#');
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if ( pos !== -1 ) {
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@ -395,16 +433,27 @@ var netFilterFromElement = function(elem, out) {
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};
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var netFilter1stSources = {
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'audio': 'src',
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'embed': 'src',
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'iframe': 'src',
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'img': 'src',
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'object': 'data'
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'object': 'data',
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'video': 'src'
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};
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var netFilter2ndSources = {
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'img': 'srcset'
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};
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var filterTypes = {
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'audio': 'media',
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'embed': 'object',
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'iframe': 'subdocument',
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'img': 'image',
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'object': 'object',
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'video': 'media',
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};
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/******************************************************************************/
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// Extract the best possible cosmetic filter, i.e. as specific as possible.
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@ -505,12 +554,36 @@ var cosmeticFilterFromElement = function(elem, out) {
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/******************************************************************************/
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var filtersFromElement = function(elem) {
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var filtersFrom = function(x, y) {
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netFilterCandidates.length = 0;
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cosmeticFilterCandidates.length = 0;
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// This is to prevent revisiting the same element more than once.
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var visited = typeof Set === 'function' ?
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new Set() :
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{
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add: function() {},
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has: function() { return true; }
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};
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// We need at least one element.
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var first = null;
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if ( typeof x === 'number' ) {
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first = elementFromPoint(x, y);
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} else if ( x instanceof HTMLElement ) {
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first = x;
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x = undefined;
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}
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if ( first === null ) {
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return 0;
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}
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// Extract filter candidates from self and all ancestors.
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var elem = first;
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while ( elem && elem !== document.body ) {
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netFilterFromElement(elem, netFilterCandidates);
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cosmeticFilterFromElement(elem, cosmeticFilterCandidates);
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visited.add(elem);
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elem = elem.parentNode;
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}
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// The body tag is needed as anchor only when the immediate child
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@ -519,6 +592,72 @@ var filtersFromElement = function(elem) {
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if ( i !== 0 && cosmeticFilterCandidates[i-1].indexOf(':nth-of-type(') !== -1 ) {
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cosmeticFilterCandidates.push('##body');
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}
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// https://github.com/gorhill/uBlock/issues/1545
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// Extract filter candidates from all elements found at point (x, y).
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if ( typeof x === 'number' ) {
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var attrName = vAPI.sessionId + '-clickblind';
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var previous;
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elem = first;
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for (;;) {
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previous = elem;
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elem.setAttribute(attrName, '');
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elem = elementFromPoint(x, y, true);
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if ( elem === null || elem === previous ) {
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break;
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}
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if ( visited.has(elem) === false ) {
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netFilterFromElement(elem, netFilterCandidates);
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visited.add(elem);
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}
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}
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var elems = document.querySelectorAll('[' + attrName + ']');
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i = elems.length;
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while ( i-- ) {
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elems[i].removeAttribute(attrName);
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}
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}
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return netFilterCandidates.length + cosmeticFilterCandidates.length;
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};
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/******************************************************************************/
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var elementsFromStylesheet = function(sheet, reURL, out) {
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var rules = sheet.rules;
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if ( !rules ) {
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return;
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}
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var iRule = rules.length;
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var rule, value, src, elems, iElem;
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while ( iRule-- ) {
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rule = rules[iRule];
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if ( rule instanceof CSSImportRule ) {
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elementsFromStylesheet(rule.styleSheet, reURL, out);
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continue;
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}
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if ( rule instanceof CSSStyleRule === false ) {
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continue;
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}
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value = rule.style.backgroundImage;
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if ( value.lastIndexOf('url(', 0) !== 0 ) {
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continue;
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}
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src = urlFromCSSPropertyValue(value);
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if ( reURL.test(src) === false ) {
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continue;
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}
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elems = document.querySelectorAll(rule.selectorText);
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iElem = elems.length;
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while ( iElem-- ) {
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out.push({
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type: 'network',
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elem: elems[iElem],
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style: 'background-image',
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opts: 'image'
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});
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}
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}
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};
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/******************************************************************************/
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@ -537,11 +676,20 @@ var elementsFromFilter = function(filter) {
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// One idea is to normalize all a[href] on the page, but for now I will
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// wait and see, as I prefer to refrain from tampering with the page
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// content if I can avoid it.
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var elems, iElem, elem;
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if ( filter.lastIndexOf('##', 0) === 0 ) {
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try {
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out = document.querySelectorAll(filter.slice(2));
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elems = document.querySelectorAll(filter.slice(2));
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}
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catch (e) {
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elems = [];
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}
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iElem = elems.length;
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while ( iElem-- ) {
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out.push({
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type: 'cosmetic',
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elem: elems[iElem],
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});
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}
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return out;
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}
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@ -577,37 +725,68 @@ var elementsFromFilter = function(filter) {
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var reFilter = null;
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try {
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reFilter = new RegExp(reStr);
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} catch (e) {
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}
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catch (e) {
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return out;
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}
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// Lookup by tag names.
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var src1stProps = netFilter1stSources;
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var src2ndProps = netFilter2ndSources;
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var elems = document.querySelectorAll(Object.keys(src1stProps).join());
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var i = elems.length;
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var elem, src;
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while ( i-- ) {
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elem = elems[i];
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src = elem[src1stProps[elem.localName]];
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var srcProp, src;
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elems = document.querySelectorAll(Object.keys(src1stProps).join());
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iElem = elems.length;
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while ( iElem-- ) {
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elem = elems[iElem];
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srcProp = src1stProps[elem.localName];
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src = elem[srcProp];
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if ( typeof src !== 'string' || src.length === 0 ) {
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src = elem[src2ndProps[elem.localName]];
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srcProp = src2ndProps[elem.localName];
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src = elem[srcProp];
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}
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if ( src && reFilter.test(src) ) {
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out.push(elem);
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out.push({
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type: 'network',
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elem: elem,
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src: srcProp,
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opts: filterTypes[elem.localName],
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});
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}
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}
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// Lookup by inline-styled background image.
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elems = document.querySelectorAll('[style*="background-image"]');
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iElem = elems.length;
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while ( iElem-- ) {
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elem = elems[iElem];
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if ( reFilter.test(backgroundImageURLFromElement(elem)) ) {
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out.push({
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type: 'network',
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elem: elem,
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style: 'background-image',
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opts: 'image',
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});
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}
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}
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// Lookup by stylesheet-styled background image.
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var sheets = document.styleSheets;
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var iSheet = sheets.length;
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while ( iSheet-- ) {
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elementsFromStylesheet(sheets[iSheet], reFilter, out);
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}
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return out;
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};
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// https://www.youtube.com/watch?v=YI2XuIOW3gM
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// https://www.youtube.com/watch?v=nuUXJ6RfIik
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/******************************************************************************/
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var userFilterFromCandidate = function() {
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var v = taCandidate.value;
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var elems = elementsFromFilter(v);
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if ( elems.length === 0 ) {
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var items = elementsFromFilter(v);
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if ( items.length === 0 ) {
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return false;
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}
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@ -623,19 +802,34 @@ var userFilterFromCandidate = function() {
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return hostname + v;
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}
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// If domain included in filter, no need for domain option
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if ( v.lastIndexOf('||', 0) === 0 ) {
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return v;
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// Assume net filter
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var opts = [];
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// If no domain included in filter, we need domain option
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if ( v.lastIndexOf('||', 0) === -1 ) {
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opts.push('domain=' + hostname);
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}
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// Assume net filter
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return v + '$domain=' + hostname;
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var item = items[0];
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if ( item.opts ) {
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opts.push(item.opts);
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}
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if ( opts.length ) {
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v += '$' + opts.join(',');
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}
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return v;
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};
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/******************************************************************************/
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var onCandidateChanged = function() {
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var elems = elementsFromFilter(taCandidate.value);
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var elems = [];
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var items = elementsFromFilter(taCandidate.value);
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for ( var i = 0; i < items.length; i++ ) {
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elems.push(items[i].elem);
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}
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dialog.querySelector('#create').disabled = elems.length === 0;
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highlightElements(elems);
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};
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@ -705,7 +899,7 @@ var onDialogClicked = function(ev) {
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filters: '! ' + d.toLocaleString() + ' ' + window.location.href + '\n' + filter,
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}
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);
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removeElements(elementsFromFilter(taCandidate.value));
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filterElements(taCandidate.value);
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stopPicker();
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}
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}
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@ -789,13 +983,16 @@ var showDialog = function(options) {
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/******************************************************************************/
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var elementFromPoint = function(x, y) {
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var elementFromPoint = function(x, y, includeBody) {
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if ( !pickerRoot ) {
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return null;
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}
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pickerRoot.style.pointerEvents = 'none';
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var elem = document.elementFromPoint(x, y);
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if ( elem === document.body || elem === document.documentElement ) {
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if (
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elem === document.body && !includeBody ||
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elem === document.documentElement
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) {
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elem = null;
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}
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pickerRoot.style.pointerEvents = '';
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@ -834,12 +1031,9 @@ var onSvgClicked = function(ev) {
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unpausePicker();
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return;
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}
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var elem = elementFromPoint(ev.clientX, ev.clientY);
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if ( elem === null ) {
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if ( filtersFrom(ev.clientX, ev.clientY) === 0 ) {
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return;
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}
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filtersFromElement(elem);
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showDialog();
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};
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@ -962,13 +1156,9 @@ var startPicker = function(details) {
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highlightElements([], true);
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var elem;
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// Try using mouse position
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if ( details.clientX !== -1 ) {
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elem = elementFromPoint(details.clientX, details.clientY);
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if ( elem !== null ) {
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filtersFromElement(elem);
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if ( filtersFrom(details.clientX, details.clientY) !== 0 ) {
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showDialog();
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return;
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}
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@ -982,11 +1172,11 @@ var startPicker = function(details) {
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}
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var srcAttrMap = {
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'a': 'href',
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'img': 'src',
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'iframe': 'src',
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'audio': 'src',
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'embed': 'src',
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'iframe': 'src',
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'img': 'src',
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'video': 'src',
|
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'audio': 'src'
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};
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var tagName = target.slice(0, pos);
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var url = target.slice(pos + 1);
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@ -996,7 +1186,7 @@ var startPicker = function(details) {
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}
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var elems = document.querySelectorAll(tagName + '[' + attr + ']');
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var i = elems.length;
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var src;
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var elem, src;
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while ( i-- ) {
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elem = elems[i];
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src = elem[attr];
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@ -1010,7 +1200,7 @@ var startPicker = function(details) {
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behavior: 'smooth',
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block: 'start'
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});
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filtersFromElement(elem);
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filtersFrom(elem);
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showDialog({ modifier: true });
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return;
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}
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@ -1041,13 +1231,21 @@ pickerRoot.style.cssText = [
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'outline: 0',
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'z-index: 2147483647',
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''
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].join('!important; ');
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].join('!important;');
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// https://github.com/gorhill/uBlock/issues/1529
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// In addition to inline styles, harden the element picker styles by using
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// a dedicated style tag.
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pickerStyle = document.createElement('style');
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pickerStyle.textContent = '#' + pickerRoot.id + ' { ' + pickerRoot.style.cssText + ' }';
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pickerStyle.textContent = [
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'#' + vAPI.sessionId + ' {',
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pickerRoot.style.cssText,
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'}',
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'[' + vAPI.sessionId + '-clickblind] {',
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'pointer-events: none !important;',
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'}',
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''
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].join('\n');
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document.documentElement.appendChild(pickerStyle);
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pickerRoot.onload = function() {
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Loading…
Reference in New Issue
Block a user