521ed0e911
We have two known PlatformObjects that need to implement some of the behavior of LegacyPlatformObjects to date: Window, and HTMLFormElement. To make this not require double (or virtual) inheritance of PlatformObject, move the behavior of LegacyPlatformObject into PlatformObject. The selection of LegacyPlatformObject behavior is done with a new bitfield of feature flags instead of a dozen virtual functions that return bool. This change simplifies every class involved in the diff with the notable exception of Window, which now needs some ugly const casts to implement named property access.
120 lines
3.7 KiB
C++
120 lines
3.7 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/StyleComputer.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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JS_DEFINE_ALLOCATOR(StyleSheetList);
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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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if (m_sheets.is_empty()) {
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// This is the first sheet, append it to the list.
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m_sheets.append(sheet);
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} else {
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// We have sheets from before. Insert the new sheet in the correct position (DOM tree order).
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bool did_insert = false;
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for (ssize_t i = m_sheets.size() - 1; i >= 0; --i) {
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auto& existing_sheet = *m_sheets[i];
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auto position = existing_sheet.owner_node()->compare_document_position(sheet.owner_node());
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if (position & DOM::Node::DocumentPosition::DOCUMENT_POSITION_FOLLOWING) {
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m_sheets.insert(i + 1, sheet);
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did_insert = true;
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break;
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}
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}
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if (!did_insert)
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m_sheets.prepend(sheet);
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}
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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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JS::NonnullGCPtr<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::PlatformObject(document.realm())
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, m_document(document)
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{
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m_legacy_platform_object_flags = LegacyPlatformObjectFlags { .supports_indexed_properties = true };
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}
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void StyleSheetList::initialize(JS::Realm& realm)
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{
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Base::initialize(realm);
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set_prototype(&Bindings::ensure_web_prototype<Bindings::StyleSheetListPrototype>(realm, "StyleSheetList"_fly_string));
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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);
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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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WebIDL::ExceptionOr<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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