private void remove(ref CompoundCmd cmd, string name, int parent)
{
inode _node = MemoryInterface.getInstance().getInodeByIndex(parent);
cmd.newOpe(new EditCmd(parent));
int id = MemoryInterface.getInstance().getDataBlockByIndex(_node.getBlock(0)).removeInode(name); //找到删除文件的inode
_node = MemoryInterface.getInstance().getInodeByIndex(id);
cmd.newOpe(new DeleteCmd(id));
if (_node.getType().Equals("文件夹"))
{
for (int i = 0; ; i++) //释放inodetable中信息
{
string _name = MemoryInterface.getInstance().getDataBlockByIndex(_node.getBlock(0)).findInode(2);
if (_name != null)
{
remove(ref cmd, _name, id);
}
else
{
break;
}
}
}
List <int> b = _node.getBlockPtr().ToList <int>(); //获得该节点占用的全部块
MemoryInterface.getInstance().releaseBlock(b); //释放块位图
MemoryInterface.getInstance().releaseInode(id); //释放节点位图
}
public override void removeEntry(int selectedItem, string name)
{
entries.RemoveAt(selectedItem);
CompoundCmd cmd = new CompoundCmd();
remove(ref cmd, name, node);
UndoManager.getInstance().newOpe(cmd);
MemoryInterface.getInstance().write();
}
public override string createEntry(string _name, string type)
{
int parent = -1;
UndoableCmd cmd1 = new EditCmd(node);
if (_name != null) //点击文件夹创建
{
parent = MemoryInterface.getInstance().getInodeIndexByName(node, _name); //选中文件夹为父目录
}
else //直接新建
{
parent = node; //当前目录为父目录
}
List <int> nodeLoc = MemoryInterface.getInstance().getRequireInodes(1); //找到未使用的inode节点
List <int> blockLoc = MemoryInterface.getInstance().getRequireBlocks(1); //找到空闲磁盘块
if (nodeLoc == null || blockLoc == null) //inodeMap或blockMap用尽
{
return(null);
}
string name = null;
if (type.Equals("文件夹"))
{
name = initDir(blockLoc, parent, nodeLoc[0]);
entries.Add(new Directory(nodeLoc[0], name));
}
else
{
name = "新建文件";
name = MemoryInterface.getInstance().addNewInodeTableItem(MemoryInterface.getInstance().getInodeByIndex(parent).getBlock(0), name, nodeLoc[0]);
inode temp = MemoryInterface.getInstance().getInodeByIndex(nodeLoc[0]);
temp.init(nodeLoc[0], blockLoc, "文件", DateTime.Now);
entries.Add(new File(temp, name));
}
UndoableCmd cmd2 = new AddCmd(nodeLoc[0]);
CompoundCmd cmd3 = new CompoundCmd();
cmd3.newOpe(cmd1);
cmd3.newOpe(cmd2);
UndoManager.getInstance().newOpe(cmd3);
MemoryInterface.getInstance().write();
return(name);
}