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LibWeb/CSS: Implement add for FontFaceSet

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There is still some work to do with some of the underying methods
called inside this method (e.g is_css_connected) but this is a start.
This commit is contained in:
Kostya Farber 2024-09-26 10:52:54 +01:00 • committed by Andrew Kaster
parent 9098e39a43
commit 14d62d7f31
Notes: github-actions[bot] 2024-09-27 20:50:24 +00:00
3 changed files with 37 additions and 4 deletions
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33
Userland/Libraries/LibWeb/CSS/FontFaceSet.cpp
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@ -61,14 +61,41 @@ void FontFaceSet::visit_edges(Cell::Visitor& visitor)
Base::visit_edges(visitor);
visitor.visit(m_set_entries);
visitor.visit(m_ready_promise);
visitor.visit(m_loading_fonts);
visitor.visit(m_loaded_fonts);
visitor.visit(m_failed_fonts);
}
// https://drafts.csswg.org/css-font-loading/#dom-fontfaceset-add
JS::NonnullGCPtr<FontFaceSet> FontFaceSet::add(JS::Handle<FontFace> face)
WebIDL::ExceptionOr<JS::NonnullGCPtr<FontFaceSet>>
FontFaceSet::add(JS::Handle<FontFace> face)
{
// FIXME: Do the actual spec steps
// 1. If font is already in the FontFaceSet’s set entries, skip to the last step of this algorithm immediately.
if (m_set_entries->set_has(face))
return JS::NonnullGCPtr<FontFaceSet>(*this);
// 2. If font is CSS-connected, throw an InvalidModificationError exception and exit this algorithm immediately.
if (face->is_css_connected()) {
return WebIDL::InvalidModificationError::create(realm(), "Cannot add a CSS-connected FontFace to a FontFaceSet"_fly_string);
}
// 3. Add the font argument to the FontFaceSet’s set entries.
m_set_entries->set_add(face);
return *this;
// 4. If font’s status attribute is "loading"
if (face->status() == Bindings::FontFaceLoadStatus::Loading) {
// 1. If the FontFaceSet’s [[LoadingFonts]] list is empty, switch the FontFaceSet to loading.
if (m_loading_fonts.is_empty()) {
m_status = Bindings::FontFaceSetLoadStatus::Loading;
}
// 2. Append font to the FontFaceSet’s [[LoadingFonts]] list.
m_loading_fonts.append(*face);
}
// 5. Return the FontFaceSet.
return JS::NonnullGCPtr<FontFaceSet>(*this);
}
// https://drafts.csswg.org/css-font-loading/#dom-fontfaceset-delete