ladybird/Userland/Libraries/LibWeb/CSS/Parser/Token.cpp
Sam Atkins 6034fc0ee6 LibWeb: Make CSS 'An+B' parsing spec-compliant
Parsing this pattern from CSS tokens turns out to be slightly crazy, but
thankfully well documented in the spec.

The spec lists the cases in order of simple -> complicated, but this
would cause problems in code, since `<n-dimension> <signed-.integer>`
would never by reached, as `<n-dimension>` comes before. Instead, I
have grouped them by their first token.

Also renamed the NthChildPattern class to ANPlusBPattern, to match spec
terminology.
2021-07-31 00:18:11 +02:00

225 lines
5 KiB
C++

/*
* Copyright (c) 2020-2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/String.h>
#include <LibWeb/CSS/Parser/Token.h>
namespace Web::CSS {
String Token::to_debug_string() const
{
StringBuilder builder;
switch (m_type) {
case Type::Invalid:
VERIFY_NOT_REACHED();
case Type::EndOfFile:
builder.append("__EOF__");
break;
case Type::Ident:
builder.append("Identifier: ");
builder.append(m_value.to_string());
return builder.to_string();
case Type::Function:
builder.append("Function");
break;
case Type::AtKeyword:
builder.append("@");
break;
case Type::Hash:
builder.append("Hash: ");
builder.append(m_value.to_string());
return builder.to_string();
case Type::String:
builder.append("String: ");
builder.append(m_value.to_string());
return builder.to_string();
case Type::BadString:
builder.append("Invalid String");
break;
case Type::Url:
builder.append("Url");
break;
case Type::BadUrl:
builder.append("Invalid Url");
break;
case Type::Delim:
builder.append("Delimiter: ");
builder.append(m_value.to_string());
return builder.to_string();
case Type::Number:
builder.append("Number: ");
builder.append(m_value.to_string());
builder.append(m_number_type == NumberType::Integer ? " (int)" : " (float)");
return builder.to_string();
case Type::Percentage:
builder.append("Percentage: ");
builder.append(m_value.to_string());
builder.append(m_unit.to_string());
return builder.to_string();
case Type::Dimension:
builder.append("Dimension: ");
builder.append(m_value.to_string());
builder.append(m_unit.to_string());
return builder.to_string();
case Type::Whitespace:
builder.append("Whitespace");
break;
case Type::CDO:
builder.append("CDO");
break;
case Type::CDC:
builder.append("CDC");
break;
case Type::Colon:
builder.append(":");
break;
case Type::Semicolon:
builder.append(";");
break;
case Type::Comma:
builder.append(",");
break;
case Type::OpenSquare:
builder.append("[");
break;
case Type::CloseSquare:
builder.append("]");
break;
case Type::OpenParen:
builder.append("(");
break;
case Type::CloseParen:
builder.append(")");
break;
case Type::OpenCurly:
builder.append("{");
break;
case Type::CloseCurly:
builder.append("}");
break;
}
if (m_value.is_empty()) {
return builder.to_string();
}
builder.append(" ");
builder.append(" { value: '");
builder.append(m_value.to_string());
if (m_type == Token::Type::Hash) {
builder.append("', hash_type: '");
if (m_hash_type == Token::HashType::Unrestricted) {
builder.append("Unrestricted");
} else {
builder.append("Id");
}
}
if (m_type == Token::Type::Number) {
builder.append("', number_type: '");
if (m_number_type == Token::NumberType::Integer) {
builder.append("Integer");
} else {
builder.append("Number");
}
}
if (m_type == Token::Type::Dimension) {
builder.append("', number_type: '");
if (m_number_type == Token::NumberType::Integer) {
builder.append("Integer");
} else {
builder.append("Number");
}
builder.append("', unit: '");
builder.append(m_unit.to_string());
}
builder.append("' }");
return builder.to_string();
}
Token::Type Token::mirror_variant() const
{
if (is(Token::Type::OpenCurly)) {
return Type::CloseCurly;
}
if (is(Token::Type::OpenSquare)) {
return Type::CloseSquare;
}
if (is(Token::Type::OpenParen)) {
return Type::CloseParen;
}
return Type::Invalid;
}
String Token::bracket_string() const
{
if (is(Token::Type::OpenCurly)) {
return "{";
}
if (is(Token::Type::CloseCurly)) {
return "}";
}
if (is(Token::Type::OpenSquare)) {
return "[";
}
if (is(Token::Type::CloseSquare)) {
return "]";
}
if (is(Token::Type::OpenParen)) {
return "(";
}
if (is(Token::Type::CloseParen)) {
return ")";
}
return "";
}
String Token::bracket_mirror_string() const
{
if (is(Token::Type::OpenCurly)) {
return "}";
}
if (is(Token::Type::CloseCurly)) {
return "{";
}
if (is(Token::Type::OpenSquare)) {
return "]";
}
if (is(Token::Type::CloseSquare)) {
return "[";
}
if (is(Token::Type::OpenParen)) {
return ")";
}
if (is(Token::Type::CloseParen)) {
return "(";
}
return "";
}
}