rewritten: plugin 'menu'

now we have a cache for the plugin
           (this limits the number of database requests)
added:     to plugin 'menu'
           menu_dir_tab can have a 'current' parameter (first argument)
           (it uses the last path from the previous menu_dir_tab) 
changed:   updated to the new EZC api
added:     new message to plugins: WINIX_DIR_ADDED


git-svn-id: svn://ttmath.org/publicrep/winix/trunk@808 e52654a7-88a9-db11-a3e9-0013d4bc506e

plugins/menu/cache.h

@@ -0,0 +1,75 @@
+/*
+ * This file is a part of Winix
+ * and is not publicly distributed
+ * 
+ * Copyright (c) 2012, Tomasz Sowa
+ * All rights reserved.
+ * 
+ */
+
+#ifndef headerfile_winix_plugins_menu_cache
+#define headerfile_winix_plugins_menu_cache
+
+#include <string>
+#include <vector>
+#include <list>
+#include "core/item.h"
+#include "core/dirs.h"
+
+
+
+namespace Menu
+{
+
+
+struct MenuItem
+{
+	long id; // item id
+	std::wstring url;
+	std::wstring subject;
+	Item::Type type;
+	int file_type;
+};
+
+
+struct CacheItem
+{
+	long dir_id;
+	int param;
+	std::vector<MenuItem> menu_items;
+	std::wstring dir;	// without the last slash
+
+	CacheItem()
+	{
+		dir_id = -1;
+		param  = -1;
+	}
+};
+
+
+
+
+
+class Cache
+{
+public:
+
+	void SetDirs(Dirs * pdirs);
+
+	CacheItem * Get(long dir_id, int param);
+	CacheItem * Insert(long dir_id, int param);
+	void Remove(long dir_id);
+	void Clear();
+
+private:
+
+	Dirs * dirs;
+	typedef std::list<CacheItem> Tab;
+	Tab tab;
+	CacheItem empty_cache_item;
+};
+
+
+} // namespace
+
+#endif