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LibHTML: Implement compound selectors

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This patch moves the Selector object model closer to the specification
objects in Selectors Level 4.

A "Selector" in LibHTML is now a { Vector<ComplexSelector> }, which is
a { Relation, CompoundSelector }. A CompoundSelector is really just
a Vector<SimpleSelector>, and SimpleSelector is "Component" renamed.

This makes a lot more selectors actually match on the Ubuntu Apache2
default homepage. :^)
This commit is contained in:
Andreas Kling 2019-11-27 20:37:36 +01:00
parent 449ebbddb6
commit d19d4da14a
Notes: sideshowbarker 2024-07-19 11:02:52 +09:00
5 changed files with 194 additions and 148 deletions
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99
Libraries/LibHTML/Dump.cpp
View file

@ -144,57 +144,70 @@ void dump_rule(const StyleRule& rule)
dbgprintf("Rule:\n");
for (auto& selector : rule.selectors()) {
dbgprintf(" Selector:\n");
for (auto& component : selector.components()) {
const char* type_description = "Unknown";
switch (component.type) {
case Selector::Component::Type::Invalid:
type_description = "Invalid";
break;
case Selector::Component::Type::Universal:
type_description = "Universal";
break;
case Selector::Component::Type::Id:
type_description = "Id";
break;
case Selector::Component::Type::Class:
type_description = "Class";
break;
case Selector::Component::Type::TagName:
type_description = "TagName";
break;
}
for (auto& complex_selector : selector.complex_selectors()) {
dbgprintf(" ");
const char* relation_description = "";
switch (component.relation) {
case Selector::Component::Relation::None:
switch (complex_selector.relation) {
case Selector::ComplexSelector::Relation::None:
break;
case Selector::Component::Relation::ImmediateChild:
relation_description = "{ImmediateChild}";
case Selector::ComplexSelector::Relation::ImmediateChild:
relation_description = "ImmediateChild";
break;
case Selector::Component::Relation::Descendant:
relation_description = "{Descendant}";
case Selector::ComplexSelector::Relation::Descendant:
relation_description = "Descendant";
break;
case Selector::Component::Relation::AdjacentSibling:
relation_description = "{AdjacentSibling}";
case Selector::ComplexSelector::Relation::AdjacentSibling:
relation_description = "AdjacentSibling";
break;
case Selector::Component::Relation::GeneralSibling:
relation_description = "{GeneralSibling}";
break;
}
const char* attribute_match_type_description = "";
switch (component.attribute_match_type) {
case Selector::Component::AttributeMatchType::None:
break;
case Selector::Component::AttributeMatchType::HasAttribute:
attribute_match_type_description = "HasAttribute";
break;
case Selector::Component::AttributeMatchType::ExactValueMatch:
attribute_match_type_description = "ExactValueMatch";
case Selector::ComplexSelector::Relation::GeneralSibling:
relation_description = "GeneralSibling";
break;
}
dbgprintf(" %s:%s %s", type_description, component.value.characters(), relation_description);
if (component.attribute_match_type != Selector::Component::AttributeMatchType::None) {
dbgprintf(" [%s, name='%s', value='%s']", attribute_match_type_description, component.attribute_name.characters(), component.attribute_value.characters());
if (*relation_description)
dbgprintf("{%s} ", relation_description);
for (int i = 0; i < complex_selector.compound_selector.size(); ++i) {
auto& simple_selector = complex_selector.compound_selector[i];
const char* type_description = "Unknown";
switch (simple_selector.type) {
case Selector::SimpleSelector::Type::Invalid:
type_description = "Invalid";
break;
case Selector::SimpleSelector::Type::Universal:
type_description = "Universal";
break;
case Selector::SimpleSelector::Type::Id:
type_description = "Id";
break;
case Selector::SimpleSelector::Type::Class:
type_description = "Class";
break;
case Selector::SimpleSelector::Type::TagName:
type_description = "TagName";
break;
}
const char* attribute_match_type_description = "";
switch (simple_selector.attribute_match_type) {
case Selector::SimpleSelector::AttributeMatchType::None:
break;
case Selector::SimpleSelector::AttributeMatchType::HasAttribute:
attribute_match_type_description = "HasAttribute";
break;
case Selector::SimpleSelector::AttributeMatchType::ExactValueMatch:
attribute_match_type_description = "ExactValueMatch";
break;
}
dbgprintf("%s:%s", type_description, simple_selector.value.characters());
if (simple_selector.attribute_match_type != Selector::SimpleSelector::AttributeMatchType::None) {
dbgprintf(" [%s, name='%s', value='%s']", attribute_match_type_description, simple_selector.attribute_name.characters(), simple_selector.attribute_value.characters());
}
if (i != complex_selector.compound_selector.size() - 1)
dbgprintf(", ");
}
dbgprintf("\n");
}