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/*
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_UTILS_CSS_PARSER_HPP_
#define _OUSIA_UTILS_CSS_PARSER_HPP_
#include <istream>
#include <map>
#include <vector>
#include <tuple>
#include "BufferedCharReader.hpp"
namespace ousia {
namespace utils {
/*
* The Specificity or Precedence of a CSS RuleSet, which decides which
* rules are applied when different RuleSets contain conflicting information.
*
* The Specificity is calculated using the official W3C recommendation
* http://www.w3.org/TR/CSS2/cascade.html#specificity
*
* Note that we do not need to use the integer 'a', since we do not allow
* local style definitions for single nodes.
*/
struct Specificity {
int b;
int c;
int d;
Specificity(int b, int c, int d) : b(b), c(c), d(d) {}
};
bool operator<(const Specificity &x, const Specificity &y)
{
return std::tie(x.b, x.c, x.d) < std::tie(y.b, y.c, y.d);
}
bool operator>(const Specificity &x, const Specificity &y)
{
return std::tie(x.b, x.c, x.d) > std::tie(y.b, y.c, y.d);
}
bool operator==(const Specificity &x, const Specificity &y)
{
return std::tie(x.b, x.c, x.d) == std::tie(y.b, y.c, y.d);
}
class RuleSet {
private:
const std::map<std::string, std::string> values;
const Specificity specificity;
public:
RuleSet(std::map<std::string, std::string> values, Specificity specificity)
: values(values), specificity(specificity)
{
}
const std::map<std::string, std::string> &getValues() const
{
return values;
}
const Specificity &getSpecificity() const { return specificity; }
};
class PseudoSelector {
private:
const std::string name;
const std::vector<std::string> args;
const bool generative;
public:
PseudoSelector(std::string name, std::vector<std::string> args,
bool generative)
: name(name), args(args), generative(generative)
{
}
const std::string &getName() const { return name; }
const std::vector<std::string> &getArgs() const { return args; }
const bool &isGenerative() const { return generative; }
};
enum class SelectionOperator { DESCENDANT, DIRECT_DESCENDANT };
// TODO: Subclass of Andreas' Node class
class StyleEdge {
private:
// TODO: This is wrong! Here we want to have a managed pointer as Andreas
// mentioned!
// const StyleNode target;
const SelectionOperator selectionOperator;
public:
StyleEdge(/*StyleNode target,*/ SelectionOperator selectionOperator)
: /*target(target),*/ selectionOperator(selectionOperator)
{
}
// const StyleNode &getTarget() const { return target; }
const SelectionOperator &getSelectionOperator() const
{
return selectionOperator;
}
};
// TODO: Subclass of Andreas' Node class
class StyleNode {
private:
const std::string className;
const PseudoSelector pseudoSelector;
const std::vector<StyleEdge> edges;
const std::vector<RuleSet> ruleSets;
public:
StyleNode(std::string className, PseudoSelector pseudoSelector,
std::vector<StyleEdge> edges, std::vector<RuleSet> ruleSets)
: className(className),
pseudoSelector(pseudoSelector),
edges(edges),
ruleSets(ruleSets)
{
}
const std::string &getClassName() const { return className; }
const PseudoSelector &getPseudoSelector() const { return pseudoSelector; }
const std::vector<StyleEdge> &getEdges() const { return edges; }
const std::vector<RuleSet> &getRuleSets() const { return ruleSets; }
};
class CSSParser {
public:
StyleNode parse(BufferedCharReader &input);
};
}
}
#endif
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