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LibWeb: Track quote-nesting level while building the layout tree

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This makes multiple levels of quote actually use different quotation
marks, instead of always the first available pair of them.

Each Layout::Node remembers what the quote-nesting level was before its
content was evaluated, so that we can re-use this number in
`apply_style()`. This is a bit hacky, since we end up converting the
`content` value into a string twice.

`StyleProperties::content()` now takes an initial quote-nesting level,
and returns the final level after that content.
This commit is contained in:
Sam Atkins 2023-09-18 15:41:17 +01:00 • committed by Andreas Kling
parent 493dd5d93c
commit 9e99368694
8 changed files with 372 additions and 14 deletions
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30
Userland/Libraries/LibWeb/CSS/StyleProperties.cpp
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@ -646,11 +646,13 @@ Optional<CSS::Clear> StyleProperties::clear() const
return value_id_to_clear(value->to_identifier());
}
CSS::ContentData StyleProperties::content() const
StyleProperties::ContentDataAndQuoteNestingLevel StyleProperties::content(u32 initial_quote_nesting_level) const
{
auto value = property(CSS::PropertyID::Content);
auto quotes_data = quotes();
auto quote_nesting_level = initial_quote_nesting_level;
auto get_quote_string = [&](bool open, auto depth) {
switch (quotes_data.type) {
case QuotesData::Type::None:
@ -684,18 +686,24 @@ CSS::ContentData StyleProperties::content() const
} else if (item->is_identifier()) {
switch (item->to_identifier()) {
case ValueID::OpenQuote:
// FIXME: Track nesting level and increment it here.
builder.append(get_quote_string(true, 1));
builder.append(get_quote_string(true, quote_nesting_level++));
break;
case ValueID::CloseQuote:
// FIXME: Track nesting level and decrement it here.
builder.append(get_quote_string(false, 1));
// A 'close-quote' or 'no-close-quote' that would make the depth negative is in error and is ignored
// (at rendering time): the depth stays at 0 and no quote mark is rendered (although the rest of the
// 'content' property's value is still inserted).
// - https://www.w3.org/TR/CSS21/generate.html#quotes-insert
// (This is missing from the CONTENT-3 spec.)
if (quote_nesting_level > 0)
builder.append(get_quote_string(false, --quote_nesting_level));
break;
case ValueID::NoOpenQuote:
// FIXME: Track nesting level and increment it here.
quote_nesting_level++;
break;
case ValueID::NoCloseQuote:
// FIXME: Track nesting level and decrement it here.
// NOTE: See CloseQuote
if (quote_nesting_level > 0)
quote_nesting_level--;
break;
default:
dbgln("`{}` is not supported in `content` (yet?)", item->to_string());
@ -721,19 +729,19 @@ CSS::ContentData StyleProperties::content() const
content_data.alt_text = MUST(alt_text_builder.to_string());
}
return content_data;
return { content_data, quote_nesting_level };
}
switch (value->to_identifier()) {
case ValueID::None:
return { ContentData::Type::None };
return { { ContentData::Type::None }, quote_nesting_level };
case ValueID::Normal:
return { ContentData::Type::Normal };
return { { ContentData::Type::Normal }, quote_nesting_level };
default:
break;
}
return CSS::ContentData {};
return { {}, quote_nesting_level };
}
Optional<CSS::Cursor> StyleProperties::cursor() const