From ca2040ba16459f5b3dfe8a86a14680eecea7ef7d Mon Sep 17 00:00:00 2001
From: Benjamin Paassen <bpaassen@techfak.uni-bielefeld.de>
Date: Fri, 21 Nov 2014 10:51:11 +0100
Subject: According to my lords holy command I enacted his graces order of
 moving all peasants and lordlings, big and small, young and old, to our
 common land and inner sanctuary to be safe from outer threats by those
 usurpers.

---
 src/core/CSSParser.hpp | 167 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 167 insertions(+)
 create mode 100644 src/core/CSSParser.hpp

(limited to 'src/core/CSSParser.hpp')

diff --git a/src/core/CSSParser.hpp b/src/core/CSSParser.hpp
new file mode 100644
index 0000000..c8b772d
--- /dev/null
+++ b/src/core/CSSParser.hpp
@@ -0,0 +1,167 @@
+/*
+    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 <core/Managed.hpp>
+#include <core/dom/Node.hpp>
+
+#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 : public Managed {
+private:
+	const std::map<std::string, std::string> values;
+	const Specificity specificity;
+
+public:
+	RuleSet(Manager &mgr, std::map<std::string, std::string> values,
+	        Specificity specificity)
+	    : Managed(mgr), values(std::move(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(std::move(name)), args(std::move(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 };
+
+class StyleNode : public dom::Node {
+public:
+	class StyleEdge : public Managed {
+	private:
+		Owned<StyleNode> target;
+		const SelectionOperator selectionOperator;
+
+	public:
+		StyleEdge(Manager &mgr, Handle<StyleNode> target,
+		          SelectionOperator selectionOperator)
+		    : Managed(mgr),
+		      target(acquire(target)),
+		      selectionOperator(selectionOperator)
+		{
+		}
+
+		Rooted<StyleNode> getTarget() const { return target; }
+
+		const SelectionOperator &getSelectionOperator() const
+		{
+			return selectionOperator;
+		}
+	};
+
+private:
+	const PseudoSelector pseudoSelector;
+	std::vector<Owned<StyleEdge>> edges;
+	const std::vector<Owned<RuleSet>> ruleSets;
+
+public:
+	StyleNode(Manager &mgr, std::string name,
+	          PseudoSelector pseudoSelector,
+	          const std::vector<Handle<StyleEdge>> &edges,
+	          const std::vector<Handle<RuleSet>> &ruleSets)
+	    : dom::Node(mgr, std::move(name)),
+	      pseudoSelector(std::move(pseudoSelector)),
+	      edges(acquire(edges)),
+	      ruleSets(acquire(ruleSets))
+	{
+	}
+
+	const PseudoSelector &getPseudoSelector() const { return pseudoSelector; }
+
+	const std::vector<Owned<StyleEdge>> &getEdges() const { return edges; }
+
+	const std::vector<Owned<RuleSet>> &getRuleSets() const { return ruleSets; }
+};
+
+class CSSParser {
+
+private:
+
+public:
+	StyleNode parse(BufferedCharReader &input);
+};
+}
+}
+#endif
-- 
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