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LibWeb/CSS: Split out @keyframes parsing code
Changes are very minimal, this is just a code move.
This commit is contained in:
Sam Atkins
Andreas Kling
parent
e5737232c0
commit
d5f3a610ac
Notes:
github-actions[bot]
2024-08-10 08:39:01 +00:00
Author: https://github.com/AtkinsSJ
Commit: d5f3a610ac
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/1018
Reviewed-by: https://github.com/awesomekling
2 changed files with 117 additions and 103 deletions
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@ -1259,112 +1259,12 @@ CSSRule* Parser::convert_to_rule(NonnullRefPtr<Rule> rule)
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if (rule->at_rule_name().equals_ignoring_ascii_case("import"sv))
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return convert_to_import_rule(rule);
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if (rule->at_rule_name().equals_ignoring_ascii_case("keyframes"sv))
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return convert_to_keyframes_rule(rule);
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if (rule->at_rule_name().equals_ignoring_ascii_case("media"sv))
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return convert_to_media_rule(rule);
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if (rule->at_rule_name().equals_ignoring_ascii_case("keyframes"sv)) {
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auto prelude_stream = TokenStream { rule->prelude() };
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prelude_stream.skip_whitespace();
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auto token = prelude_stream.next_token();
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if (!token.is_token()) {
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dbgln_if(CSS_PARSER_DEBUG, "CSSParser: @keyframes has invalid prelude, prelude = {}; discarding.", rule->prelude());
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return {};
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}
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auto name_token = token.token();
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prelude_stream.skip_whitespace();
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if (prelude_stream.has_next_token()) {
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dbgln_if(CSS_PARSER_DEBUG, "CSSParser: @keyframes has invalid prelude, prelude = {}; discarding.", rule->prelude());
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return {};
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}
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if (name_token.is(Token::Type::Ident) && (is_css_wide_keyword(name_token.ident()) || name_token.ident().equals_ignoring_ascii_case("none"sv))) {
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dbgln_if(CSS_PARSER_DEBUG, "CSSParser: @keyframes rule name is invalid: {}; discarding.", name_token.ident());
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return {};
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}
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if (!name_token.is(Token::Type::String) && !name_token.is(Token::Type::Ident)) {
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dbgln_if(CSS_PARSER_DEBUG, "CSSParser: @keyframes rule name is invalid: {}; discarding.", name_token.to_debug_string());
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return {};
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}
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auto name = name_token.to_string();
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if (!rule->block())
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return {};
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auto child_tokens = TokenStream { rule->block()->values() };
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JS::MarkedVector<CSSRule*> keyframes(m_context.realm().heap());
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while (child_tokens.has_next_token()) {
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child_tokens.skip_whitespace();
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// keyframe-selector = <keyframe-keyword> | <percentage>
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// keyframe-keyword = "from" | "to"
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// selector = <keyframe-selector>#
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// keyframes-block = "{" <declaration-list>? "}"
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// keyframe-rule = <selector> <keyframes-block>
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auto selectors = Vector<CSS::Percentage> {};
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while (child_tokens.has_next_token()) {
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child_tokens.skip_whitespace();
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if (!child_tokens.has_next_token())
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break;
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auto tok = child_tokens.next_token();
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if (!tok.is_token()) {
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dbgln_if(CSS_PARSER_DEBUG, "CSSParser: @keyframes rule has invalid selector: {}; discarding.", tok.to_debug_string());
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child_tokens.reconsume_current_input_token();
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break;
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}
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auto token = tok.token();
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auto read_a_selector = false;
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if (token.is(Token::Type::Ident)) {
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if (token.ident().equals_ignoring_ascii_case("from"sv)) {
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selectors.append(CSS::Percentage(0));
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read_a_selector = true;
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}
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if (token.ident().equals_ignoring_ascii_case("to"sv)) {
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selectors.append(CSS::Percentage(100));
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read_a_selector = true;
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}
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} else if (token.is(Token::Type::Percentage)) {
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selectors.append(CSS::Percentage(token.percentage()));
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read_a_selector = true;
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}
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if (read_a_selector) {
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child_tokens.skip_whitespace();
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if (child_tokens.next_token().is(Token::Type::Comma))
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continue;
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}
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child_tokens.reconsume_current_input_token();
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break;
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}
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if (!child_tokens.has_next_token())
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break;
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child_tokens.skip_whitespace();
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auto token = child_tokens.next_token();
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if (token.is_block()) {
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auto block_tokens = token.block().values();
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auto block_stream = TokenStream { block_tokens };
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auto block_declarations = parse_a_list_of_declarations(block_stream);
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auto style = convert_to_style_declaration(block_declarations);
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for (auto& selector : selectors) {
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auto keyframe_rule = CSSKeyframeRule::create(m_context.realm(), selector, *style);
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keyframes.append(keyframe_rule);
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}
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} else {
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dbgln_if(CSS_PARSER_DEBUG, "CSSParser: @keyframes rule has invalid block: {}; discarding.", token.to_debug_string());
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}
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}
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return CSSKeyframesRule::create(m_context.realm(), name, CSSRuleList::create(m_context.realm(), move(keyframes)));
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}
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if (rule->at_rule_name().equals_ignoring_ascii_case("namespace"sv))
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return convert_to_namespace_rule(rule);
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@ -1458,6 +1358,119 @@ JS::GCPtr<CSSImportRule> Parser::convert_to_import_rule(Rule& rule)
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return CSSImportRule::create(url.value(), const_cast<DOM::Document&>(*m_context.document()));
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}
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JS::GCPtr<CSSKeyframesRule> Parser::convert_to_keyframes_rule(Rule& rule)
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{
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// https://www.w3.org/TR/css-animations-1/#keyframes
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if (rule.prelude().is_empty()) {
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dbgln_if(CSS_PARSER_DEBUG, "Failed to parse @keyframes rule: Empty prelude.");
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return {};
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}
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if (!rule.block()) {
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dbgln_if(CSS_PARSER_DEBUG, "Failed to parse @keyframes rule: No block.");
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return {};
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}
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auto prelude_stream = TokenStream { rule.prelude() };
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prelude_stream.skip_whitespace();
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auto& token = prelude_stream.next_token();
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if (!token.is_token()) {
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dbgln_if(CSS_PARSER_DEBUG, "CSSParser: @keyframes has invalid prelude, prelude = {}; discarding.", rule.prelude());
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return {};
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}
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auto name_token = token.token();
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prelude_stream.skip_whitespace();
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if (prelude_stream.has_next_token()) {
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dbgln_if(CSS_PARSER_DEBUG, "CSSParser: @keyframes has invalid prelude, prelude = {}; discarding.", rule.prelude());
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return {};
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}
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if (name_token.is(Token::Type::Ident) && (is_css_wide_keyword(name_token.ident()) || name_token.ident().equals_ignoring_ascii_case("none"sv))) {
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dbgln_if(CSS_PARSER_DEBUG, "CSSParser: @keyframes rule name is invalid: {}; discarding.", name_token.ident());
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return {};
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}
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if (!name_token.is(Token::Type::String) && !name_token.is(Token::Type::Ident)) {
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dbgln_if(CSS_PARSER_DEBUG, "CSSParser: @keyframes rule name is invalid: {}; discarding.", name_token.to_debug_string());
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return {};
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}
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auto name = name_token.to_string();
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auto child_tokens = TokenStream { rule.block()->values() };
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JS::MarkedVector<CSSRule*> keyframes(m_context.realm().heap());
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while (child_tokens.has_next_token()) {
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child_tokens.skip_whitespace();
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// keyframe-selector = <keyframe-keyword> | <percentage>
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// keyframe-keyword = "from" | "to"
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// selector = <keyframe-selector>#
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// keyframes-block = "{" <declaration-list>? "}"
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// keyframe-rule = <selector> <keyframes-block>
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auto selectors = Vector<CSS::Percentage> {};
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while (child_tokens.has_next_token()) {
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child_tokens.skip_whitespace();
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if (!child_tokens.has_next_token())
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break;
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auto tok = child_tokens.next_token();
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if (!tok.is_token()) {
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dbgln_if(CSS_PARSER_DEBUG, "CSSParser: @keyframes rule has invalid selector: {}; discarding.", tok.to_debug_string());
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child_tokens.reconsume_current_input_token();
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break;
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}
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auto token = tok.token();
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auto read_a_selector = false;
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if (token.is(Token::Type::Ident)) {
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if (token.ident().equals_ignoring_ascii_case("from"sv)) {
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selectors.append(CSS::Percentage(0));
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read_a_selector = true;
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}
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if (token.ident().equals_ignoring_ascii_case("to"sv)) {
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selectors.append(CSS::Percentage(100));
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read_a_selector = true;
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}
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} else if (token.is(Token::Type::Percentage)) {
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selectors.append(CSS::Percentage(token.percentage()));
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read_a_selector = true;
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}
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if (read_a_selector) {
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child_tokens.skip_whitespace();
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if (child_tokens.next_token().is(Token::Type::Comma))
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continue;
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}
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child_tokens.reconsume_current_input_token();
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break;
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}
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if (!child_tokens.has_next_token())
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break;
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child_tokens.skip_whitespace();
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auto token = child_tokens.next_token();
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if (token.is_block()) {
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auto block_tokens = token.block().values();
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auto block_stream = TokenStream { block_tokens };
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auto block_declarations = parse_a_list_of_declarations(block_stream);
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auto style = convert_to_style_declaration(block_declarations);
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for (auto& selector : selectors) {
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auto keyframe_rule = CSSKeyframeRule::create(m_context.realm(), selector, *style);
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keyframes.append(keyframe_rule);
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}
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} else {
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dbgln_if(CSS_PARSER_DEBUG, "CSSParser: @keyframes rule has invalid block: {}; discarding.", token.to_debug_string());
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}
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}
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return CSSKeyframesRule::create(m_context.realm(), name, CSSRuleList::create(m_context.realm(), move(keyframes)));
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}
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JS::GCPtr<CSSNamespaceRule> Parser::convert_to_namespace_rule(Rule& rule)
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{
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// https://drafts.csswg.org/css-namespaces/#syntax
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