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Diffstat (limited to 'src/core/CSSParser.hpp')
| -rw-r--r-- | src/core/CSSParser.hpp | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/src/core/CSSParser.hpp b/src/core/CSSParser.hpp deleted file mode 100644 index 870ce37..0000000 --- a/src/core/CSSParser.hpp +++ /dev/null @@ -1,142 +0,0 @@ -/* - Ousía - Copyright (C) 2014 Benjamin Paaßen, Andreas Stöckel - - This program is free software: you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation, either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. -*/ - -#ifndef _OUSIA_CSS_PARSER_HPP_ -#define _OUSIA_CSS_PARSER_HPP_ - -#include <vector> -#include <tuple> - -#include <core/parser/Parser.hpp> - -#include "BufferedCharReader.hpp" -#include "CodeTokenizer.hpp" -#include "CSS.hpp" -#include "Exceptions.hpp" - -namespace ousia { -namespace parser { -namespace css { - -/** - * This is a context free, recursive parser for a subset of the CSS3 language - * as defined by W3C. We allow the following grammar: - * - * DOC := SELECT RULESET DOC | epsilon - * SELECTORS := SELECT , SELECTORS | SELECT - * SELECT := SELECT' OPERATOR SELECT | SELECT' - * SELECT' := TYPE | TYPE:PSEUDO | TYPE::GEN_PSEUDO | - * TYPE:PSEUDO(ARGUMENTS) | - * TYPE::GEN_PSEUDO(ARGUMENTS) | TYPE#ID | - * TYPE[ATTRIBUTE] | TYPE[ATTRIBUTE=VALUE] - * TYPE := string - * PSEUDO := string - * GEN_PSEUDO := string - * ARGUMENTS := string , ARGUMENTS - * ID := string - * ATTRIBUTE := string - * VALUE := string - * OPERATOR := epsilon | > - * RULESET := epsilon | { RULES } - * RULES := RULE RULES | epsilon - * RULE := KEY : VALUE ; - * KEY := string - * VALUE := type-specific parser - * - * - * @author Benjamin Paassen - bpaassen@techfak.uni-bielefeld.de - */ -class CSSParser : public Parser { -private: - /** - * Implements the DOC Nonterminal - */ - void parseDocument(Rooted<SelectorNode> root, CodeTokenizer &tokenizer, - ParserContext &ctx); - /** - * Implements the SELECTORS Nonterminal and adds all leaf nodes of the - * resulting SelectorTree to the input leafList so that a parsed RuleSet can - * be inserted there. - */ - void parseSelectors(Rooted<SelectorNode> root, CodeTokenizer &tokenizer, - std::vector<Rooted<SelectorNode>> &leafList, - ParserContext &ctx); - /** - * Implements the SELECT Nonterminal, which in effect parses a SelectorPath - * of the SelectorTree and returns the beginning node of the path as first - * element as well as the leaf of the path as second tuple element. - */ - std::tuple<Rooted<SelectorNode>, Rooted<SelectorNode>> parseSelector( - CodeTokenizer &tokenizer, ParserContext &ctx); - - /** - * Implements the SELECT' Nonterminal, which parses a single Selector with - * its PseudoSelector and returns it. - */ - Rooted<SelectorNode> parsePrimitiveSelector(CodeTokenizer &tokenizer, - ParserContext &ctx); - - // TODO: Add RuleSet parsing methods. - - /** - * A convenience function to wrap around the tokenizer peek() function that - * only returns true if an instance of the expected type occurs. - * - * @param expectedType the ID of the expected type according to the - * CodeTokenizer specification. - * @param tokenizer the tokenizer for the input. - * @param t an empty token that gets the parsed token content - * if it has the expected type. - * @param force a flag to be set if it would be fatal for the - * parsing process to get the wrong type. In that case - * an exception is thrown. - * @return true iff a token of the expected type was found. - */ - bool expect(int expectedType, CodeTokenizer &tokenizer, Token &t, - bool force, ParserContext &ctx); - -public: - /** - * This parses the given input as CSS content as specified by the grammar - * seen above. The return value is a Rooted reference to the root of the - * SelectorTree. - * TODO: The RuleSet at the respective node at the tree lists all CSS Style - * rules that apply. - * - * @param is is a reference to the input stream that should be parsed. - * @param ctx is a reference to the context that should be used while - * parsing the document. - * @return returns the root node of the resulting SelectorTree. For more - * information on the return conventions consult the Parser.hpp. - */ - Rooted<Node> parse(std::istream &is, ParserContext &ctx) override; - - /** - * As befits a class called CSSParser, this Parser parses CSS. - */ - std::set<std::string> mimetypes() - { - std::set<std::string> out{"text/css"}; - return out; - } -}; -} -} -} - -#endif |