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Allow preprocessing of the input stream to be skipped #382

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Merged
merged 1 commit into from
Oct 30, 2022

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@sideshowbarker sideshowbarker commented Oct 30, 2022

This change adds an optional isPreprocessed boolean parameter to the StyleSheetParser() constructor; if the value of that parameter is true, the steps from https://drafts.csswg.org/css-syntax/#input-preprocessing for preprocessing the input stream are skipped — so UnescapeFilterReader() is not called.

This is useful in a context where the input stream has already been preprocessed — for example, if the contents of the stylesheet being parsed are from an HTML document that has already been parsed by a conformant HTML parser (which is the case, for example, when the https://github.com/validator/validator HTML checker calls the code).

@sideshowbarker sideshowbarker requested a review from ylafon October 30, 2022 09:39
@sideshowbarker sideshowbarker force-pushed the sideshowbarker/preprocessing-skipping-allow branch 2 times, most recently from 4efeabc to 01656fe Compare October 30, 2022 09:49
This change adds an optional isPreprocessed boolean parameter to the
StyleSheetParser() constructor; if the value of that parameter is true,
the steps from https://drafts.csswg.org/css-syntax/#input-preprocessing
for preprocessing the input stream are skipped — so UnescapeFilterReader()
is not called.

This is useful in a context where the input stream has already been
preprocessed — for example, if the contents of the stylesheet being
parsed are from an HTML document that has already been parsed by a
conformant HTML parser (which is the case, for example, when the
https://github.com/validator/validator HTML checker calls the code).
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@ylafon ylafon left a comment

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Would be better to fix the pre-processing if needed, as pre-processing twice shouldn't change as it should be idempotent, but ok to have it as an interim solution.

@ylafon ylafon merged commit ebabe74 into main Oct 30, 2022
@sideshowbarker sideshowbarker deleted the sideshowbarker/preprocessing-skipping-allow branch October 31, 2022 03:41
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2 participants