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LibWeb: Move CSS TokenStream to its own file
This lets us use TokenStream in StyleComputer without every user of StyleComputer pulling in the entire CSS Parser.
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3 changed files with 140 additions and 146 deletions
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@ -22,6 +22,7 @@
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#include <LibWeb/CSS/Parser/DeclarationOrAtRule.h>
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#include <LibWeb/CSS/Parser/Function.h>
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#include <LibWeb/CSS/Parser/Rule.h>
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#include <LibWeb/CSS/Parser/TokenStream.h>
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#include <LibWeb/CSS/Parser/Tokenizer.h>
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#include <LibWeb/CSS/Ratio.h>
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#include <LibWeb/CSS/Selector.h>
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@ -56,71 +57,6 @@ private:
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AK::URL m_url;
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};
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template<typename T>
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class TokenStream {
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public:
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class StateTransaction {
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public:
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explicit StateTransaction(TokenStream<T>& token_stream)
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: m_token_stream(token_stream)
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, m_saved_iterator_offset(token_stream.m_iterator_offset)
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{
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}
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~StateTransaction()
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{
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if (!m_commit)
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m_token_stream.m_iterator_offset = m_saved_iterator_offset;
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}
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StateTransaction create_child() { return StateTransaction(*this); }
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void commit()
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{
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m_commit = true;
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if (m_parent)
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m_parent->commit();
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}
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private:
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explicit StateTransaction(StateTransaction& parent)
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: m_parent(&parent)
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, m_token_stream(parent.m_token_stream)
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, m_saved_iterator_offset(parent.m_token_stream.m_iterator_offset)
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{
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}
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StateTransaction* m_parent { nullptr };
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TokenStream<T>& m_token_stream;
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int m_saved_iterator_offset { 0 };
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bool m_commit { false };
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};
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explicit TokenStream(Vector<T> const&);
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~TokenStream() = default;
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TokenStream(TokenStream<T> const&) = delete;
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bool has_next_token();
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T const& next_token();
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T const& peek_token(int offset = 0);
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T const& current_token();
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void reconsume_current_input_token();
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StateTransaction begin_transaction() { return StateTransaction(*this); }
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void skip_whitespace();
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void dump_all_tokens();
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private:
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Vector<T> const& m_tokens;
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int m_iterator_offset { -1 };
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T make_eof();
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T m_eof;
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};
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class Parser {
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public:
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Parser(ParsingContext const&, StringView input, String const& encoding = "utf-8");
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