Kozea/WeasyPrint

@footnote::before and other broken at-rules not discarded

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#2,215 opened on Jul 31, 2024

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 (4 comments) (0 reactions) (0 assignees)Python (6,291 stars) (630 forks)batch import
buggood first issue

Description

The spec mentions the "footnote rule", but doesn't actually specify how to create it.

I tried to create a 20% wide rule with @footnote::before:

@page
   @footnote::before {
        display: block;
        width: 20%;
        border-top: solid 0.2mm;
    }
}

but the "::before" seems to be stripped and the rule applied to the entire area instead:

ss

Is it reasonable to expect "::before" to apply to the footnote area?

Contributor guide

Tech stack
pythoncsshtml
Domain
backend
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
CSS pseudo elementsWeasyPrint usage
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65
Research direction
Investigate how WeasyPrint handles CSS at rules like @footnote and pseudo elements. Check the CSS parser module (likely weasyprint/css/) for how @footnote::before is parsed. Refer to the CSS GCPM spec for footnote rule behavior. Look for existing tests for footnote rules and pseudo elements.