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langref: add section numbers

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When reading a document with nested sections, it is not easy to discover
the depth of the current section.

Add support for nested section numbers, from the h2 to the h4 heading,
in the format "lv1. ", "lv1.lv2. ", "lv1.lv2.lv3. ".  The "Zig Version"
and "Table of Content" sections are excluded.

The section numbers are implemented in CSS, with the CSS rules declared
inside a @media rule.  Currently the @media rule targets all media.
This commit is contained in:
Manlio Perillo 2022-12-09 17:14:18 +01:00 • committed by Veikka Tuominen
parent 3db8cffa3b
commit 3542dbf0ea
1 changed files with 34 additions and 0 deletions
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34
doc/langref.html.in
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@ -300,6 +300,40 @@
color: #fff; color: #fff;
} }
} }
@media all {
main {
counter-reset: section-2;
}
h2 {
counter-reset: section-3;
}
h2::before {
counter-increment: section-2;
content: counter(section-2) ". ";
font-weight: normal;
}
h3 {
counter-reset: section-4;
}
h3::before {
counter-increment: section-3;
content: counter(section-2) "." counter(section-3) ". ";
font-weight: normal;
}
h4::before {
counter-increment: section-4;
content: counter(section-2) "." counter(section-3) "." counter(section-4) ". ";
font-weight: normal;
}
#zig-version::before {
content: "";
}
#table-of-contents::before {
content: "";
}
}
}
</style> </style>
</head> </head>
<body> <body>