menu: generalize filtering, introduce interfaces

2012-08-31 23:09:56 +02:00
parent f1625c920a
commit 4c944085d6
25 changed files with 516 additions and 142 deletions
--- a/src/regex_filter.h
+++ b/src/regex_filter.h
@@ -0,0 +1,61 @@
+/***************************************************************************
+ *   Copyright (C) 2008-2012 by Andrzej Rybczak                            *
+ *   electricityispower@gmail.com                                          *
+ *                                                                         *
+ *   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 2 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, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.              *
+ ***************************************************************************/
+
+#ifndef _REGEX_FILTER
+#define _REGEX_FILTER
+
+#include "menu.h"
+
+template <typename T> struct RegexFilter
+{
+	typedef NCurses::Menu<T> MenuT;
+	typedef typename NCurses::Menu<T>::Item MenuItem;
+	typedef std::function<bool(const Regex &, MenuT &menu, const MenuItem &)> FilterFunction;
+	
+	RegexFilter(const std::string &regex_, int cflags, FilterFunction custom_filter = 0)
+	: m_rx(regex_, cflags), m_custom_filter(custom_filter) { }
+	
+	bool operator()(MenuT &menu, const MenuItem &item) {
+		if (m_rx.regex().empty())
+			return true;
+		if (!m_rx.error().empty())
+			return false;
+		if (m_custom_filter)
+			return m_custom_filter(m_rx, menu, item);
+		return m_rx.match(menu.Stringify(item));
+	}
+	
+	static std::string currentFilter(NCurses::Menu<T> &menu)
+	{
+		std::string filter;
+		auto rf = menu.getFilter().template target< RegexFilter<T> >();
+		if (rf)
+			filter = rf->m_rx.regex();
+		return filter;
+	}
+	
+private:
+	Regex m_rx;
+	FilterFunction m_custom_filter;
+};
+
+
+
+#endif