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LibWeb: Implement @supports rule :^)

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The main thing missing is that we don't serialize the supports clause,
but for actually using a `@supports (something: cool) {}` rule in CSS,
it works!
This commit is contained in:
Sam Atkins 2021-10-08 17:48:14 +01:00 • committed by Andreas Kling
parent 439d978ea5
commit 57a25139a5
9 changed files with 129 additions and 0 deletions
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14
Userland/Libraries/LibWeb/Dump.cpp
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@ -13,6 +13,7 @@
#include <LibWeb/CSS/CSSRule.h>
#include <LibWeb/CSS/CSSStyleRule.h>
#include <LibWeb/CSS/CSSStyleSheet.h>
#include <LibWeb/CSS/CSSSupportsRule.h>
#include <LibWeb/CSS/PropertyID.h>
#include <LibWeb/DOM/Comment.h>
#include <LibWeb/DOM/Document.h>
@ -500,6 +501,9 @@ void dump_rule(StringBuilder& builder, CSS::CSSRule const& rule, int indent_leve
case CSS::CSSRule::Type::Media:
dump_media_rule(builder, verify_cast<CSS::CSSMediaRule const>(rule), indent_levels);
break;
case CSS::CSSRule::Type::Supports:
dump_supports_rule(builder, verify_cast<CSS::CSSSupportsRule const>(rule), indent_levels);
break;
case CSS::CSSRule::Type::__Count:
VERIFY_NOT_REACHED();
}
@ -521,6 +525,16 @@ void dump_media_rule(StringBuilder& builder, CSS::CSSMediaRule const& media, int
}
}
void dump_supports_rule(StringBuilder& builder, CSS::CSSSupportsRule const& supports, int indent_levels)
{
indent(builder, indent_levels);
builder.appendff(" Supports: {}\n Rules ({}):\n", supports.condition_text(), supports.css_rules().length());
for (auto& rule : supports.css_rules()) {
dump_rule(builder, rule, indent_levels + 1);
}
}
void dump_style_rule(StringBuilder& builder, CSS::CSSStyleRule const& rule, int indent_levels)
{
for (auto& selector : rule.selectors()) {