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LibWeb: Give CSS Token and StyleComponentValueRule matching is() funcs

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The end goal here is to make the two classes mostly interchangeable, as
the CSS spec requires that the various parser algorithms can take a
stream of either class, and we want to have that functionality without
needing to duplicate all of the code.
This commit is contained in:
Sam Atkins 2021-07-03 15:06:53 +01:00 committed by Andreas Kling
parent 9c14504bbb
commit 6c03123b2d
Notes: sideshowbarker 2024-07-18 09:14:08 +09:00 
Author: https://github.com/AtkinsSJ
Commit: https://github.com/SerenityOS/serenity/commit/6c03123b2de
Pull-request: https://github.com/SerenityOS/serenity/pull/8341
5 changed files with 72 additions and 102 deletions
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104
Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
View File

@ -275,7 +275,7 @@ Optional<Selector> Parser::parse_single_selector(Vector<StyleComponentValueRule>
dbgln("Expected a string or ident for the value to match attribute against, got: '{}'", value_part.to_string());
return {};
}
simple_selector.attribute_value = value_part.token().is_ident() ? value_part.token().ident() : value_part.token().string();
simple_selector.attribute_value = value_part.token().is(Token::Type::Ident) ? value_part.token().ident() : value_part.token().string();
// FIXME: Handle case-sensitivity suffixes. https://www.w3.org/TR/selectors-4/#attribute-case
return simple_selector;
@ -346,7 +346,7 @@ Optional<Selector> Parser::parse_single_selector(Vector<StyleComponentValueRule>
dbgln("Unknown pseudo class: '{}'", pseudo_name);
return simple_selector;
}
} else if (current_value.is_function()) {
} else if (current_value.is(Token::Type::Function)) {
auto& pseudo_function = current_value.function();
if (pseudo_function.name().equals_ignoring_case("nth-child")) {
simple_selector.pseudo_class = CSS::Selector::SimpleSelector::PseudoClass::NthChild;
@ -459,15 +459,15 @@ NonnullRefPtrVector<StyleRule> Parser::consume_a_list_of_rules(bool top_level)
for (;;) {
auto token = next_token();
if (token.is_whitespace()) {
if (token.is(Token::Type::Whitespace)) {
continue;
}
if (token.is_eof()) {
if (token.is(Token::Type::EndOfFile)) {
break;
}
if (token.is_cdo() || token.is_cdc()) {
if (token.is(Token::Type::CDO) || token.is(Token::Type::CDC)) {
if (top_level) {
continue;
}
@ -481,7 +481,7 @@ NonnullRefPtrVector<StyleRule> Parser::consume_a_list_of_rules(bool top_level)
continue;
}
if (token.is_at()) {
if (token.is(Token::Type::AtKeyword)) {
reconsume_current_input_token();
rules.append(consume_an_at_rule());
continue;
@ -506,16 +506,16 @@ NonnullRefPtr<StyleRule> Parser::consume_an_at_rule()
for (;;) {
auto token = next_token();
if (token.is_semicolon()) {
if (token.is(Token::Type::Semicolon)) {
return rule;
}
if (token.is_eof()) {
if (token.is(Token::Type::EndOfFile)) {
log_parse_error();
return rule;
}
if (token.is_open_curly()) {
if (token.is(Token::Type::OpenCurly)) {
rule->m_block = consume_a_simple_block();
return rule;
}
@ -535,12 +535,12 @@ RefPtr<StyleRule> Parser::consume_a_qualified_rule()
for (;;) {
auto token = next_token();
if (token.is_eof()) {
if (token.is(Token::Type::EndOfFile)) {
log_parse_error();
return {};
}
if (token.is_open_curly()) {
if (token.is(Token::Type::OpenCurly)) {
rule->m_block = consume_a_simple_block();
return rule;
}
@ -559,10 +559,10 @@ StyleComponentValueRule Parser::consume_a_component_value()
{
auto token = next_token();
if (token.is_open_curly() || token.is_open_square() || token.is_open_paren())
if (token.is(Token::Type::OpenCurly) || token.is(Token::Type::OpenSquare) || token.is(Token::Type::OpenParen))
return StyleComponentValueRule(consume_a_simple_block());
if (token.is_function())
if (token.is(Token::Type::Function))
return StyleComponentValueRule(consume_a_function());
return StyleComponentValueRule(token);
@ -578,22 +578,20 @@ NonnullRefPtr<StyleBlockRule> Parser::consume_a_simple_block()
for (;;) {
auto token = next_token();
if (token.m_type == ending_token) {
if (token.is(ending_token)) {
return block;
}
if (token.is_eof()) {
if (token.is(Token::Type::EndOfFile)) {
log_parse_error();
return block;
}
reconsume_current_input_token();
auto value = consume_a_component_value();
if (value.m_type == StyleComponentValueRule::ComponentType::Token) {
if (value.m_token.is_whitespace()) {
continue;
}
}
if (value.is(Token::Type::Whitespace))
continue;
block->m_values.append(value);
}
}
@ -604,22 +602,20 @@ NonnullRefPtr<StyleFunctionRule> Parser::consume_a_function()
for (;;) {
auto token = next_token();
if (token.is_close_paren()) {
if (token.is(Token::Type::CloseParen)) {
return function;
}
if (token.is_eof()) {
if (token.is(Token::Type::EndOfFile)) {
log_parse_error();
return function;
}
reconsume_current_input_token();
auto value = consume_a_component_value();
if (value.m_type == StyleComponentValueRule::ComponentType::Token) {
if (value.m_token.is_whitespace()) {
continue;
}
}
if (value.is(Token::Type::Whitespace))
continue;
function->m_values.append(value.to_string());
}
@ -638,7 +634,7 @@ Optional<StyleDeclarationRule> Parser::consume_a_declaration()
declaration.m_name = token.m_value.to_string();
for (;;) {
if (!peek_token().is_whitespace()) {
if (!peek_token().is(Token::Type::Whitespace)) {
break;
}
next_token();
@ -646,20 +642,20 @@ Optional<StyleDeclarationRule> Parser::consume_a_declaration()
auto colon = next_token();
if (!colon.is_colon()) {
if (!colon.is(Token::Type::Colon)) {
log_parse_error();
return {};
}
for (;;) {
if (!peek_token().is_whitespace()) {
if (!peek_token().is(Token::Type::Whitespace)) {
break;
}
next_token();
}
for (;;) {
if (peek_token().is_eof()) {
if (peek_token().is(Token::Type::EndOfFile)) {
break;
}
declaration.m_values.append(consume_a_component_value());
@ -672,8 +668,8 @@ Optional<StyleDeclarationRule> Parser::consume_a_declaration()
auto last_token = last.m_token;
auto second_last_token = second_last.m_token;
if (second_last_token.is_delim() && second_last_token.m_value.to_string().equals_ignoring_case("!")) {
if (last_token.is_ident() && last_token.m_value.to_string().equals_ignoring_case("important")) {
if (second_last_token.is(Token::Type::Delim) && second_last_token.m_value.to_string().equals_ignoring_case("!")) {
if (last_token.is(Token::Type::Ident) && last_token.m_value.to_string().equals_ignoring_case("important")) {
declaration.m_values.remove(declaration.m_values.size() - 2);
declaration.m_values.remove(declaration.m_values.size() - 1);
declaration.m_important = true;
@ -683,7 +679,7 @@ Optional<StyleDeclarationRule> Parser::consume_a_declaration()
for (;;) {
auto maybe_whitespace = declaration.m_values.at(declaration.m_values.size() - 1);
if (!(maybe_whitespace.m_type == StyleComponentValueRule::ComponentType::Token && maybe_whitespace.m_token.is_whitespace())) {
if (!(maybe_whitespace.is(Token::Type::Whitespace))) {
break;
}
declaration.m_values.remove(declaration.m_values.size() - 1);
@ -698,27 +694,27 @@ Vector<DeclarationOrAtRule> Parser::consume_a_list_of_declarations()
for (;;) {
auto token = next_token();
if (token.is_whitespace() || token.is_semicolon()) {
if (token.is(Token::Type::Whitespace) || token.is(Token::Type::Semicolon)) {
continue;
}
if (token.is_eof()) {
if (token.is(Token::Type::EndOfFile)) {
return list;
}
if (token.is_at()) {
if (token.is(Token::Type::AtKeyword)) {
reconsume_current_input_token();
list.append(DeclarationOrAtRule(consume_an_at_rule()));
continue;
}
if (token.is_ident()) {
if (token.is(Token::Type::Ident)) {
Vector<StyleComponentValueRule> temp;
temp.append(StyleComponentValueRule(token));
for (;;) {
auto peek = peek_token();
if (peek.is_semicolon() || peek.is_eof()) {
if (peek.is(Token::Type::Semicolon) || peek.is(Token::Type::EndOfFile)) {
break;
}
temp.append(consume_a_component_value());
@ -733,7 +729,7 @@ Vector<DeclarationOrAtRule> Parser::consume_a_list_of_declarations()
log_parse_error();
reconsume_current_input_token();
auto peek = peek_token();
if (!(peek.is_semicolon() || peek.is_eof())) {
if (!(peek.is(Token::Type::Semicolon) || peek.is(Token::Type::EndOfFile))) {
consume_a_component_value();
}
}
@ -747,7 +743,7 @@ RefPtr<CSSRule> Parser::parse_as_rule()
for (;;) {
auto maybe_whitespace = peek_token();
if (!maybe_whitespace.is_whitespace()) {
if (!maybe_whitespace.is(Token::Type::Whitespace)) {
break;
}
next_token();
@ -755,9 +751,9 @@ RefPtr<CSSRule> Parser::parse_as_rule()
auto token = peek_token();
if (token.is_eof()) {
if (token.is(Token::Type::EndOfFile)) {
return {};
} else if (token.is_at()) {
} else if (token.is(Token::Type::AtKeyword)) {
auto at_rule = consume_an_at_rule();
rule = convert_rule(at_rule);
} else {
@ -770,14 +766,14 @@ RefPtr<CSSRule> Parser::parse_as_rule()
for (;;) {
auto maybe_whitespace = peek_token();
if (!maybe_whitespace.is_whitespace()) {
if (!maybe_whitespace.is(Token::Type::Whitespace)) {
break;
}
next_token();
}
auto maybe_eof = peek_token();
if (maybe_eof.is_eof()) {
if (maybe_eof.is(Token::Type::EndOfFile)) {
return rule;
}
@ -802,7 +798,7 @@ Optional<StyleProperty> Parser::parse_as_declaration()
{
for (;;) {
auto maybe_whitespace = peek_token();
if (!maybe_whitespace.is_whitespace()) {
if (!maybe_whitespace.is(Token::Type::Whitespace)) {
break;
}
next_token();
@ -810,7 +806,7 @@ Optional<StyleProperty> Parser::parse_as_declaration()
auto token = peek_token();
if (!token.is_ident()) {
if (!token.is(Token::Type::Ident)) {
return {};
}
@ -830,7 +826,7 @@ Optional<StyleComponentValueRule> Parser::parse_as_component_value()
{
for (;;) {
auto maybe_whitespace = peek_token();
if (!maybe_whitespace.is_whitespace()) {
if (!maybe_whitespace.is(Token::Type::Whitespace)) {
break;
}
next_token();
@ -838,7 +834,7 @@ Optional<StyleComponentValueRule> Parser::parse_as_component_value()
auto token = peek_token();
if (token.is_eof()) {
if (token.is(Token::Type::EndOfFile)) {
return {};
}
@ -846,14 +842,14 @@ Optional<StyleComponentValueRule> Parser::parse_as_component_value()
for (;;) {
auto maybe_whitespace = peek_token();
if (!maybe_whitespace.is_whitespace()) {
if (!maybe_whitespace.is(Token::Type::Whitespace)) {
break;
}
next_token();
}
auto maybe_eof = peek_token();
if (maybe_eof.is_eof()) {
if (maybe_eof.is(Token::Type::EndOfFile)) {
return value;
}
@ -864,7 +860,7 @@ Vector<StyleComponentValueRule> Parser::parse_as_list_of_component_values()
Vector<StyleComponentValueRule> rules;
for (;;) {
if (peek_token().is_eof()) {
if (peek_token().is(Token::Type::EndOfFile)) {
break;
}
@ -882,10 +878,10 @@ Vector<Vector<StyleComponentValueRule>> Parser::parse_as_comma_separated_list_of
for (;;) {
auto next = next_token();
if (next.is_comma()) {
if (next.is(Token::Type::Comma)) {
lists.append({});
continue;
} else if (next.is_eof()) {
} else if (next.is(Token::Type::EndOfFile)) {
break;
}

6
Userland/Libraries/LibWeb/CSS/Parser/StyleBlockRule.h
View File

@ -21,9 +21,9 @@ public:
StyleBlockRule();
~StyleBlockRule();
bool is_curly() const { return m_token.is_open_curly(); }
bool is_paren() const { return m_token.is_open_paren(); }
bool is_square() const { return m_token.is_open_square(); }
bool is_curly() const { return m_token.is(Token::Type::OpenCurly); }
bool is_paren() const { return m_token.is(Token::Type::OpenParen); }
bool is_square() const { return m_token.is(Token::Type::OpenSquare); }
Vector<StyleComponentValueRule> const& values() const { return m_values; }

30
Userland/Libraries/LibWeb/CSS/Parser/Token.cpp
View File

@ -149,15 +149,15 @@ String Token::to_string() const
Token::Type Token::mirror_variant() const
{
if (is_open_curly()) {
if (is(Token::Type::OpenCurly)) {
return Type::CloseCurly;
}
if (is_open_square()) {
if (is(Token::Type::OpenSquare)) {
return Type::CloseSquare;
}
if (is_open_paren()) {
if (is(Token::Type::OpenParen)) {
return Type::CloseParen;
}
@ -166,27 +166,27 @@ Token::Type Token::mirror_variant() const
String Token::bracket_string() const
{
if (is_open_curly()) {
if (is(Token::Type::OpenCurly)) {
return "{";
}
if (is_close_curly()) {
if (is(Token::Type::CloseCurly)) {
return "}";
}
if (is_open_square()) {
if (is(Token::Type::OpenSquare)) {
return "[";
}
if (is_close_square()) {
if (is(Token::Type::CloseSquare)) {
return "]";
}
if (is_open_paren()) {
if (is(Token::Type::OpenParen)) {
return "(";
}
if (is_close_paren()) {
if (is(Token::Type::CloseParen)) {
return ")";
}
@ -195,27 +195,27 @@ String Token::bracket_string() const
String Token::bracket_mirror_string() const
{
if (is_open_curly()) {
if (is(Token::Type::OpenCurly)) {
return "}";
}
if (is_close_curly()) {
if (is(Token::Type::CloseCurly)) {
return "{";
}
if (is_open_square()) {
if (is(Token::Type::OpenSquare)) {
return "]";
}
if (is_close_square()) {
if (is(Token::Type::CloseSquare)) {
return "[";
}
if (is_open_paren()) {
if (is(Token::Type::OpenParen)) {
return ")";
}
if (is_close_paren()) {
if (is(Token::Type::CloseParen)) {
return "(";
}

32
Userland/Libraries/LibWeb/CSS/Parser/Token.h
View File

@ -56,49 +56,23 @@ public:
Number,
};
bool is_eof() const { return m_type == Type::EndOfFile; }
bool is_ident() const { return m_type == Type::Ident; }
bool is_function() const { return m_type == Type::Function; }
bool is_at() const { return m_type == Type::AtKeyword; }
bool is_hash() const { return m_type == Type::Hash; }
bool is_string() const { return m_type == Type::String; }
bool is_bad_string() const { return m_type == Type::BadString; }
bool is_url() const { return m_type == Type::Url; }
bool is_bad_url() const { return m_type == Type::BadUrl; }
bool is_delim() const { return m_type == Type::Delim; }
bool is_number() const { return m_type == Type::Number; }
bool is_percentage() const { return m_type == Type::Percentage; }
bool is_dimension() const { return m_type == Type::Dimension; }
bool is_whitespace() const { return m_type == Type::Whitespace; }
bool is_cdo() const { return m_type == Type::CDO; }
bool is_cdc() const { return m_type == Type::CDC; }
bool is_colon() const { return m_type == Type::Colon; }
bool is_semicolon() const { return m_type == Type::Semicolon; }
bool is_comma() const { return m_type == Type::Comma; }
bool is_open_square() const { return m_type == Type::OpenSquare; }
bool is_close_square() const { return m_type == Type::CloseSquare; }
bool is_open_paren() const { return m_type == Type::OpenParen; }
bool is_close_paren() const { return m_type == Type::CloseParen; }
bool is_open_curly() const { return m_type == Type::OpenCurly; }
bool is_close_curly() const { return m_type == Type::CloseCurly; }
bool is(Type type) const { return m_type == type; }
StringView ident() const
{
VERIFY(is_ident());
VERIFY(m_type == Type::Ident);
return m_value.string_view();
}
StringView delim() const
{
VERIFY(is_delim());
VERIFY(m_type == Type::Delim);
return m_value.string_view();
}
StringView string() const
{
VERIFY(is_string());
VERIFY(m_type == Type::String);
return m_value.string_view();
}

2
Userland/Libraries/LibWeb/CSS/Parser/Tokenizer.cpp
View File

@ -207,7 +207,7 @@ Vector<Token> Tokenizer::parse()
auto token = consume_a_token();
tokens.append(token);
if (token.is_eof()) {
if (token.is(Token::Type::EndOfFile)) {
return tokens;
}
}