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Code Issues Releases Wiki Activity

select optimal hideElements depending on whether shadow DOM is supported

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gorhill 2015-09-15 09:51:22 -04:00
parent 02874dfd05
commit ab24f725ce
1 changed files with 45 additions and 42 deletions
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87
src/js/contentscript-end.js
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@ -443,55 +443,58 @@ var uBlockCollapser = (function() {
//console.debug('µBlock> generic cosmetic filters: injecting %d CSS rules:', selectors.length, text);
};
var hideElements = function(selectors) {
// https://github.com/chrisaljoudi/uBlock/issues/207
// Do not call querySelectorAll() using invalid CSS selectors
if ( selectors.length === 0 ) {
return;
}
var hideElements = (function() {
if ( document.body === null ) {
return;
return function() {};
}
var elems = document.querySelectorAll(selectors);
var i = elems.length;
if ( i === 0 ) {
return;
}
// https://github.com/chrisaljoudi/uBlock/issues/158
// Using CSSStyleDeclaration.setProperty is more reliable
if ( document.body.shadowRoot === undefined ) {
while ( i-- ) {
elems[i].style.setProperty('display', 'none', 'important');
}
return;
return function(selectors) {
// https://github.com/chrisaljoudi/uBlock/issues/207
// Do not call querySelectorAll() using invalid CSS selectors
if ( selectors.length === 0 ) { return; }
var elems = document.querySelectorAll(selectors);
var i = elems.length;
if ( i === 0 ) { return; }
// https://github.com/chrisaljoudi/uBlock/issues/158
// Using CSSStyleDeclaration.setProperty is more reliable
while ( i-- ) {
elems[i].style.setProperty('display', 'none', 'important');
}
};
}
// https://github.com/gorhill/uBlock/issues/435
// Using shadow content so that we do not have to modify style
// attribute.
var sessionId = vAPI.sessionId;
var elem, shadow;
while ( i-- ) {
elem = elems[i];
shadow = elem.shadowRoot;
// https://www.chromestatus.com/features/4668884095336448
// "Multiple shadow roots is being deprecated."
if ( shadow !== null ) {
if ( shadow.className !== sessionId ) {
return function(selectors) {
if ( selectors.length === 0 ) { return; }
var elems = document.querySelectorAll(selectors);
var i = elems.length;
if ( i === 0 ) { return; }
// https://github.com/gorhill/uBlock/issues/435
// Using shadow content so that we do not have to modify style
// attribute.
var sessionId = vAPI.sessionId;
var elem, shadow;
while ( i-- ) {
elem = elems[i];
shadow = elem.shadowRoot;
// https://www.chromestatus.com/features/4668884095336448
// "Multiple shadow roots is being deprecated."
if ( shadow !== null ) {
if ( shadow.className !== sessionId ) {
elem.style.setProperty('display', 'none', 'important');
}
continue;
}
// https://github.com/gorhill/uBlock/pull/555
// Not all nodes can be shadowed:
// https://github.com/w3c/webcomponents/issues/102
try {
shadow = elem.createShadowRoot();
shadow.className = sessionId;
} catch (ex) {
elem.style.setProperty('display', 'none', 'important');
}
continue;
}
// https://github.com/gorhill/uBlock/pull/555
// Not all nodes can be shadowed:
// https://github.com/w3c/webcomponents/issues/102
try {
shadow = elem.createShadowRoot();
shadow.className = sessionId;
} catch (ex) {
elem.style.setProperty('display', 'none', 'important');
}
}
};
};
})();
// Extract and return the staged nodes which (may) match the selectors.