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LibWeb: Load fonts from style sheet once when sheet is added

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Previously, we were running the "load fonts if needed" machine at the
start of every style computation. That was a lot of unnecessary work,
especially on sites with lots of style rules, since we had to traverse
every style sheet to see if any @font-face rules needed loading.

With this patch, we now load fonts once per sheet, right after adding
it to a document's style sheet list.
This commit is contained in:
Andreas Kling 2022-04-08 21:27:35 +02:00
parent 5b72a9cb11
commit 6e70670e0b
3 changed files with 19 additions and 20 deletions
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3
Userland/Libraries/LibWeb/CSS/StyleSheetList.cpp
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@ -13,9 +13,10 @@ void StyleSheetList::add_sheet(NonnullRefPtr<CSSStyleSheet> sheet)
{
VERIFY(!m_sheets.contains_slow(sheet));
sheet->set_style_sheet_list({}, this);
m_sheets.append(move(sheet));
m_sheets.append(sheet);
m_document.style_computer().invalidate_rule_cache();
m_document.style_computer().load_fonts_from_sheet(*sheet);
m_document.invalidate_style();
}