985ed47a38
Optional seems like a good idea, but in many places we were not checking if it had a value, which was causing crashes when the Tokenizer was given malformed input. Using an EOF value along with is_eof() makes things a lot simpler.
105 lines
2.6 KiB
C++
105 lines
2.6 KiB
C++
/*
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* Copyright (c) 2020-2021, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Optional.h>
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#include <AK/String.h>
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#include <AK/StringView.h>
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#include <AK/Types.h>
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#include <AK/Utf8View.h>
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#include <LibWeb/CSS/Parser/Token.h>
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#include <LibWeb/Forward.h>
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namespace Web::CSS {
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class U32Twin {
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public:
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void set(size_t index, u32 value)
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{
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if (index == 0)
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first = value;
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if (index == 1)
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second = value;
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}
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u32 first {};
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u32 second {};
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};
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class U32Triplet {
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public:
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void set(size_t index, u32 value)
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{
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if (index == 0)
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first = value;
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if (index == 1)
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second = value;
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if (index == 2)
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third = value;
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}
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U32Twin to_twin_12()
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{
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return { first, second };
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}
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U32Twin to_twin_23()
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{
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return { second, third };
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}
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u32 first {};
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u32 second {};
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u32 third {};
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};
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class CSSNumber {
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public:
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String value;
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Token::NumberType type {};
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};
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class Tokenizer {
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public:
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explicit Tokenizer(const StringView& input, const String& encoding);
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[[nodiscard]] Vector<Token> parse();
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private:
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[[nodiscard]] u32 next_code_point();
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[[nodiscard]] u32 peek_code_point(size_t offset = 0) const;
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[[nodiscard]] U32Twin peek_twin() const;
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[[nodiscard]] U32Triplet peek_triplet() const;
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[[nodiscard]] static Token create_new_token(Token::TokenType);
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[[nodiscard]] static Token create_value_token(Token::TokenType, String value);
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[[nodiscard]] static Token create_value_token(Token::TokenType, u32 value);
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[[nodiscard]] Token consume_a_token();
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[[nodiscard]] Token consume_string_token(u32 ending_code_point);
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[[nodiscard]] Token consume_a_numeric_token();
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[[nodiscard]] Token consume_an_ident_like_token();
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[[nodiscard]] CSSNumber consume_a_number();
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[[nodiscard]] String consume_a_name();
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[[nodiscard]] u32 consume_escaped_code_point();
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[[nodiscard]] Token consume_a_url_token();
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void consume_the_remnants_of_a_bad_url();
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void consume_comments();
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void reconsume_current_input_code_point();
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[[nodiscard]] bool is_valid_escape_sequence();
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[[nodiscard]] static bool is_valid_escape_sequence(U32Twin);
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[[nodiscard]] bool would_start_an_identifier();
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[[nodiscard]] bool would_start_an_identifier(U32Triplet);
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[[nodiscard]] bool starts_with_a_number() const;
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[[nodiscard]] static bool starts_with_a_number(U32Triplet);
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String m_decoded_input;
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Utf8View m_utf8_view;
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AK::Utf8CodePointIterator m_utf8_iterator;
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AK::Utf8CodePointIterator m_prev_utf8_iterator;
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};
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}
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