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LibWeb: Implement CSSStyleSheet.addRule()
This is a legacy method that has been superseded by `insertRule()`, although it is supported by all modern browser engines.
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5 changed files with 68 additions and 1 deletions
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@ -257,6 +257,34 @@ WebIDL::ExceptionOr<void> CSSStyleSheet::replace_sync(StringView text)
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return {};
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}
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// https://drafts.csswg.org/cssom/#dom-cssstylesheet-addrule
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WebIDL::ExceptionOr<WebIDL::Long> CSSStyleSheet::add_rule(Optional<String> selector, Optional<String> style, Optional<WebIDL::UnsignedLong> index)
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{
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// 1. Let rule be an empty string.
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StringBuilder rule;
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// 2. Append selector to rule.
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if (selector.has_value())
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rule.append(selector.release_value());
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// 3. Append " { " to rule.
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rule.append('{');
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// 4. If block is not empty, append block, followed by a space, to rule.
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if (style.has_value() && !style->is_empty())
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rule.appendff("{} ", style.release_value());
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// 5. Append "}" to rule.
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rule.append('}');
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// 6. Let index be optionalIndex if provided, or the number of CSS rules in the stylesheet otherwise.
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// 7. Call insertRule(), with rule and index as arguments.
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TRY(insert_rule(rule.string_view(), index.value_or(rules().length())));
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// 8. Return -1.
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return -1;
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}
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// https://www.w3.org/TR/cssom/#dom-cssstylesheet-removerule
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WebIDL::ExceptionOr<void> CSSStyleSheet::remove_rule(unsigned index)
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{
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@ -13,6 +13,7 @@
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#include <LibWeb/CSS/CSSRuleList.h>
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#include <LibWeb/CSS/CSSStyleRule.h>
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#include <LibWeb/CSS/StyleSheet.h>
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#include <LibWeb/WebIDL/Types.h>
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namespace Web::CSS {
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@ -49,6 +50,7 @@ public:
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CSSRuleList const* css_rules() const { return m_rules; }
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WebIDL::ExceptionOr<unsigned> insert_rule(StringView rule, unsigned index);
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WebIDL::ExceptionOr<WebIDL::Long> add_rule(Optional<String> selector, Optional<String> style, Optional<WebIDL::UnsignedLong> index);
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WebIDL::ExceptionOr<void> remove_rule(unsigned index);
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WebIDL::ExceptionOr<void> delete_rule(unsigned index);
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@ -18,7 +18,7 @@ interface CSSStyleSheet : StyleSheet {
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// https://drafts.csswg.org/cssom/#legacy-css-style-sheet-members
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[SameObject, ImplementedAs=css_rules] readonly attribute CSSRuleList rules;
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// FIXME: long addRule(optional DOMString selector = "undefined", optional DOMString style = "undefined", optional unsigned long index);
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long addRule(optional DOMString selector = "undefined", optional DOMString style = "undefined", optional unsigned long index);
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undefined removeRule(unsigned long index);
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};
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