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/*
* Copyright (c) 2020-2021, SerenityOS developers
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Optional.h>
#include <AK/String.h>
#include <AK/StringView.h>
#include <AK/Types.h>
#include <AK/Utf8View.h>
#include <LibWeb/CSS/Parser/Token.h>
#include <LibWeb/Forward.h>
namespace Web::CSS {
class U32Twin {
public:
void set(size_t index, u32 value)
{
if (index == 0)
first = value;
if (index == 1)
second = value;
}
u32 first {};
u32 second {};
};
class U32Triplet {
public:
void set(size_t index, u32 value)
{
if (index == 0)
first = value;
if (index == 1)
second = value;
if (index == 2)
third = value;
}
U32Twin to_twin_12()
{
return { first, second };
}
U32Twin to_twin_23()
{
return { second, third };
}
u32 first {};
u32 second {};
u32 third {};
};
class CSSNumber {
public:
String value;
Token::NumberType type {};
};
class Tokenizer {
public:
explicit Tokenizer(const StringView& input, const String& encoding);
[[nodiscard]] Vector<Token> parse();
private:
[[nodiscard]] Optional<u32> next_codepoint();
[[nodiscard]] Optional<u32> peek_codepoint(size_t offset = 0) const;
[[nodiscard]] Optional<U32Twin> peek_twin() const;
[[nodiscard]] Optional<U32Triplet> peek_triplet() const;
[[nodiscard]] static Token create_new_token(Token::TokenType);
[[nodiscard]] static Token create_value_token(Token::TokenType, String value);
[[nodiscard]] static Token create_value_token(Token::TokenType, u32 value);
[[nodiscard]] Token consume_a_token();
[[nodiscard]] Token consume_string_token(u32 ending_codepoint);
[[nodiscard]] Token consume_a_numeric_token();
[[nodiscard]] Token consume_an_ident_like_token();
[[nodiscard]] CSSNumber consume_a_number();
[[nodiscard]] String consume_a_name();
[[nodiscard]] u32 consume_escaped_codepoint();
[[nodiscard]] Token consume_a_url_token();
void consume_the_remnants_of_a_bad_url();
void consume_comments();
void reconsume_current_input_codepoint();
[[nodiscard]] bool is_valid_escape_sequence();
[[nodiscard]] static bool is_valid_escape_sequence(U32Twin);
[[nodiscard]] bool would_start_an_identifier();
[[nodiscard]] bool would_start_an_identifier(U32Triplet);
[[nodiscard]] bool starts_with_a_number() const;
[[nodiscard]] static bool starts_with_a_number(U32Triplet);
String m_decoded_input;
Utf8View m_utf8_view;
AK::Utf8CodepointIterator m_utf8_iterator;
AK::Utf8CodepointIterator m_prev_utf8_iterator;
};
}
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