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62cbaa74f3
Also remove the color values from the ComputedStyle object and get them via StyleProperties instead. At the moment, we only handle colors that Color::from_string() parses.
78 lines
2.3 KiB
C++
78 lines
2.3 KiB
C++
#include <LibHTML/CSS/StyleResolver.h>
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#include <LibHTML/CSS/StyleSheet.h>
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#include <LibHTML/DOM/Document.h>
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#include <LibHTML/DOM/Element.h>
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#include <LibHTML/Dump.h>
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#include <stdio.h>
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StyleResolver::StyleResolver(Document& document)
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: m_document(document)
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{
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}
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StyleResolver::~StyleResolver()
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{
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}
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static bool matches(const Selector& selector, const Element& element)
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{
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// FIXME: Support compound selectors.
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ASSERT(selector.components().size() == 1);
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auto& component = selector.components().first();
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switch (component.type) {
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case Selector::Component::Type::Id:
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return component.value == element.attribute("id");
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case Selector::Component::Type::Class:
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return element.has_class(component.value);
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case Selector::Component::Type::TagName:
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return component.value == element.tag_name();
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default:
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ASSERT_NOT_REACHED();
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}
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}
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NonnullRefPtrVector<StyleRule> StyleResolver::collect_matching_rules(const Element& element) const
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{
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NonnullRefPtrVector<StyleRule> matching_rules;
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for (auto& sheet : document().stylesheets()) {
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for (auto& rule : sheet.rules()) {
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for (auto& selector : rule.selectors()) {
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if (matches(selector, element)) {
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matching_rules.append(rule);
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break;
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}
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}
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}
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}
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#ifdef HTML_DEBUG
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printf("Rules matching Element{%p}\n", &element);
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for (auto& rule : matching_rules) {
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dump_rule(rule);
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}
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#endif
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return matching_rules;
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}
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StyleProperties StyleResolver::resolve_style(const Element& element, const StyleProperties* parent_properties) const
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{
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StyleProperties style_properties;
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if (parent_properties) {
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parent_properties->for_each_property([&](const StringView& name, auto& value) {
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// TODO: proper inheritance
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if (name.starts_with("font") || name == "white-space" || name == "color")
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style_properties.set_property(name, value);
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});
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}
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auto matching_rules = collect_matching_rules(element);
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for (auto& rule : matching_rules) {
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for (auto& declaration : rule.declarations()) {
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style_properties.set_property(declaration.property_name(), declaration.value());
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}
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}
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return style_properties;
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}
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