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Fix static filtering parser's validation of selectors/styles 

Related issue:
- https://github.com/uBlockOrigin/uBlock-issues/issues/2170#issuecomment-1207921464
This commit is contained in:
Raymond Hill 2022-08-08 12:04:17 -04:00
parent a69250ba82
commit cd50f76e74
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1 changed files with 6 additions and 0 deletions
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6
src/js/static-filtering-parser.js
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@ -1487,12 +1487,17 @@ Parser.prototype.SelectorCompiler = class {
// selector is declarative or not.
// https://github.com/uBlockOrigin/uBlock-issues/issues/1806#issuecomment-963278382
// Forbid multiple and unexpected CSS style declarations.
// https://github.com/uBlockOrigin/uBlock-issues/issues/2170#issuecomment-1207921464
// Assigning text content to the `style` element resets the `disabled`
// state of the sheet, so we need to explicitly disable it each time we
// assign new text.
sheetSelectable(s) {
if ( this.reCommonSelector.test(s) ) { return true; }
if ( this.cssValidatorElement === null ) { return true; }
let valid = false;
try {
this.cssValidatorElement.childNodes[0].nodeValue = `_z + ${s}{color:red;} _z{color:red;}`;
this.cssValidatorElement.sheet.disabled = true;
const rules = this.cssValidatorElement.sheet.cssRules;
valid = rules.length === 2 &&
rules[0].style.cssText !== '' &&
@ -1636,6 +1641,7 @@ Parser.prototype.SelectorCompiler = class {
let valid = false;
try {
this.cssValidatorElement.childNodes[0].nodeValue = `_z{${s}} _z{color:red;}`;
this.cssValidatorElement.sheet.disabled = true;
const rules = this.cssValidatorElement.sheet.cssRules;
valid = rules.length >= 2 &&
rules[0].style.cssText !== '' &&