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Properly serialize CSS combinators according to position in selector
Related issue:
https://github.com/uBlockOrigin/uBlock-issues/issues/2778
Regression from:
bb41d9594f
The regression occurred because the modified code made the assumption
that a leading combinator would never be preceded by whitespace, while
the parser didn't prevent this.
The parser has been fixed to ensure there is never a leading
whitespace in a selector.
This commit is contained in:
parent
79cf5f574c
commit
fbc7a0e0ae
@ -3364,7 +3364,7 @@ class ExtSelectorCompiler {
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out.push(`.${data.name}`);
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break;
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case 'Combinator':
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out.push(data.name === ' ' ? ' ' : ` ${data.name} `);
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out.push(data.name);
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break;
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case 'Identifier':
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if ( this.reInvalidIdentifier.test(data.name) ) { return; }
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@ -3436,6 +3436,28 @@ class ExtSelectorCompiler {
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return out.join('');
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}
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astAppendPart(part, out) {
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const { data } = part;
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switch ( data.type ) {
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case 'Combinator': {
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const s = this.astSerializePart(part);
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if ( s === undefined ) { return false; }
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if ( out.length === 0 ) {
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if ( s !== ' ' ) {
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out.push(s, ' ');
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}
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} else {
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out.push(' ');
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if ( s !== ' ' ) {
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out.push(s, ' ');
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}
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}
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break;
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}
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}
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return true;
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}
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astSerialize(parts, plainCSS = true) {
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const out = [];
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for ( const part of parts ) {
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@ -3443,7 +3465,6 @@ class ExtSelectorCompiler {
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switch ( data.type ) {
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case 'AttributeSelector':
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case 'ClassSelector':
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case 'Combinator':
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case 'Identifier':
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case 'IdSelector':
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case 'Nth':
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@ -3455,6 +3476,9 @@ class ExtSelectorCompiler {
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out.push(s);
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break;
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}
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case 'Combinator':
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if ( this.astAppendPart(part, out) === false ) { return; }
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break;
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case 'Raw':
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if ( plainCSS ) { return; }
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out.push(this.astSerializePart(part));
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@ -3499,7 +3523,6 @@ class ExtSelectorCompiler {
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}
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case 'AttributeSelector':
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case 'ClassSelector':
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case 'Combinator':
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case 'IdSelector':
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case 'PseudoClassSelector':
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case 'PseudoElementSelector':
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@ -3509,6 +3532,10 @@ class ExtSelectorCompiler {
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prelude.push(component);
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break;
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}
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case 'Combinator': {
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if ( this.astAppendPart(part, prelude) === false ) { return; }
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break;
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}
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case 'ProceduralSelector': {
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if ( prelude.length !== 0 ) {
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let spath = prelude.join('');
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