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14d4f227f2
For whatever reason, web pages sometimes add and/or remove a completely empty style sheet. When this happens, we don't need to invalidate the document's style, since the outcome will be the same as before.
94 lines
2.6 KiB
C++
94 lines
2.6 KiB
C++
/*
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* Copyright (c) 2020-2022, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/QuickSort.h>
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/Bindings/StyleSheetListPrototype.h>
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#include <LibWeb/CSS/StyleSheetList.h>
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#include <LibWeb/DOM/Document.h>
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namespace Web::CSS {
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void StyleSheetList::add_sheet(CSSStyleSheet& sheet)
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{
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sheet.set_style_sheet_list({}, this);
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m_sheets.append(sheet);
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sort_sheets();
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if (sheet.rules().length() == 0) {
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// NOTE: If the added sheet has no rules, we don't have to invalidate anything.
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return;
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}
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m_document.style_computer().invalidate_rule_cache();
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m_document.style_computer().load_fonts_from_sheet(sheet);
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m_document.invalidate_style();
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}
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void StyleSheetList::remove_sheet(CSSStyleSheet& sheet)
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{
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sheet.set_style_sheet_list({}, nullptr);
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m_sheets.remove_first_matching([&](auto& entry) { return entry.ptr() == &sheet; });
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if (sheet.rules().length() == 0) {
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// NOTE: If the removed sheet had no rules, we don't have to invalidate anything.
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return;
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}
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sort_sheets();
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m_document.style_computer().invalidate_rule_cache();
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m_document.invalidate_style();
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}
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StyleSheetList* StyleSheetList::create(DOM::Document& document)
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{
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auto& realm = document.realm();
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return realm.heap().allocate<StyleSheetList>(realm, document);
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}
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StyleSheetList::StyleSheetList(DOM::Document& document)
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: Bindings::LegacyPlatformObject(Bindings::ensure_web_prototype<Bindings::StyleSheetListPrototype>(document.realm(), "StyleSheetList"))
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, m_document(document)
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{
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}
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void StyleSheetList::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_document);
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for (auto sheet : m_sheets)
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visitor.visit(sheet.ptr());
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}
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// https://www.w3.org/TR/cssom/#ref-for-dfn-supported-property-indices%E2%91%A1
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bool StyleSheetList::is_supported_property_index(u32 index) const
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{
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// The object’s supported property indices are the numbers in the range zero to one less than the number of CSS style sheets represented by the collection.
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// If there are no such CSS style sheets, then there are no supported property indices.
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if (m_sheets.is_empty())
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return false;
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return index < m_sheets.size();
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}
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JS::Value StyleSheetList::item_value(size_t index) const
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{
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if (index >= m_sheets.size())
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return JS::js_undefined();
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return m_sheets[index].ptr();
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}
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void StyleSheetList::sort_sheets()
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{
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quick_sort(m_sheets, [](JS::NonnullGCPtr<StyleSheet> a, JS::NonnullGCPtr<StyleSheet> b) {
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return a->owner_node()->is_before(*b->owner_node());
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});
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}
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}
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