//撤销上一步操作
private void button7_Click(object sender, EventArgs e)
{
//检查之前是否有操作
if (iteraterList.Count == 0)
{
MessageBox.Show("无可撤销的操作", "Tip",
MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
FileIterater fileIterater = iteraterList[iteraterList.Count - 1];
//撤销对文件的删除
if (fileIterater.isfile && fileIterater.isdeleted)
{
recoverFile(fileIterater);
}
//撤销对目录的删除
else if (!fileIterater.isfile && fileIterater.isdeleted)
{
recoverFolder(fileIterater);
}
//撤销文件的创建，释放内存且不此操作可逆
else if (fileIterater.isfile && !fileIterater.isdeleted)
{
undoFileCreation(fileIterater);
}
//撤销文件夹的创建
else if ((!fileIterater.isfile && !fileIterater.isdeleted))
{
undoFolderCreation(fileIterater);
}
}
//创建文件
private void button4_Click(object sender, EventArgs e)
{
if (treeView1.SelectedNode == null)
{
MessageBox.Show("请选择一个节点", "提示信息",
MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else
{
//创建一个节点对象，并初始化
fileNode tmp;
tmp = new fileNode();
if (newFileName == "")
{
MessageBox.Show("请输入名称", "提示信息",
MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else
{
tmp.Text = newFileName + ".txt";
tmp.ToolTipText = "1";
//在TreeView组件中加入子节点
tmp.size = 0;
//for (int i = 0; i < 32;i++ )
//{
// if(Fat[i].Name==tmp.Text)
// {
// MessageBox.Show("有重复命名的文件", "提示信息",
// MessageBoxButtons.OK, MessageBoxIcon.Information);
// return;
// }
//}
//tmp.address = CreateFile(1, tmp.Text);
if (!MemManager.CanCreate(tmp.Text))
{
MessageBox.Show("有重复命名的文件", "提示信息",
MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
tmp.address = MemManager.AllocateFile(1, tmp.Text);
if (tmp.address >= 0)
{
treeView1.SelectedNode.Nodes.Add(tmp);
treeView1.SelectedNode = tmp;
FileStream NewText = File.Create(tmp.Text);
NewText.Close();
}
else
{
MessageBox.Show("磁盘空间不足，创建失败", "提示信息",
MessageBoxButtons.OK, MessageBoxIcon.Information);
}
textBox2.Text = "";
FileIterater fileIterater = new FileIterater(tmp, treeView1.SelectedNode, true, false);
iteraterList.Add(fileIterater);
}
}
}
public void AddNode(FileIterater node)
{
node.next = this.next;
node.last = this;
this.next.last = node;
this.next = node;
}
private void undoFolderCreation(FileIterater fileIterater)
{
TreeNode father = fileIterater.father;
TreeNode node = fileIterater.node;
father.Nodes.Remove(node);
iteraterList.RemoveAt(iteraterList.Count - 1);
}
//撤销对目录的删除
private void recoverFolder(FileIterater fileIterater)
{
TreeNode father = fileIterater.father;
TreeNode node = fileIterater.node;
father.Nodes.Add(node);
iteraterList.RemoveAt(iteraterList.Count - 1);
}
//撤销文件的创建，释放内存且此操作不可逆
private void undoFileCreation(FileIterater fileIterater)
{
TreeNode father = fileIterater.father;
TreeNode node = fileIterater.node;
MemManager.ReleaseFile(node.Text);
File.Delete(node.Text);
father.Nodes.Remove(node);
iteraterList.RemoveAt(iteraterList.Count - 1);
}
//////////////
//buttons
/////////////
//删除文件
private void button3_Click(object sender, EventArgs e)
{
if (treeView1.SelectedNode == null)
{
MessageBox.Show("请选择一个节点删除", "提示信息",
MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
if (treeView1.SelectedNode.Parent == null)
{
MessageBox.Show("根节点不可以删除", "提示信息",
MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
if (treeView1.SelectedNode.ToolTipText == "1")
{
//int now = FindinFat(treeView1.SelectedNode.Text);
//int pre = now;
//while (Fat[now].next != -1)
//{
// pre = now;
// now = Fat[now].next;
// Fat[pre].isStart = false;
// Fat[pre].Name = "";
// Fat[pre].next = -1;
// Fat[pre].busy = false;
// emptyblock++;
//}
//Fat[now].isStart = false;
//Fat[now].Name = "";
//Fat[now].next = -1;
//Fat[now].busy = false;
//emptyblock++;
//
FileIterater fileIterater = new FileIterater(treeView1.SelectedNode, treeView1.SelectedNode.Parent, true, true);
iteraterList.Add(fileIterater);
//
}
else
{
FileIterater fileIterater = new FileIterater(treeView1.SelectedNode, treeView1.SelectedNode.Parent, false, true);
iteraterList.Add(fileIterater);
}
//DeleteFile(treeView1.SelectedNode.Nodes);
//DeletePath(treeView1.SelectedNode);
treeView1.Nodes.Remove(treeView1.SelectedNode);
}
//撤销对文件的删除
private void recoverFile(FileIterater fileIterater)
{
TreeNode father = fileIterater.father;
TreeNode node = fileIterater.node;
//MemManager.AllocateFile(1, node.Text);
father.Nodes.Add(node);
FileStream NewText = File.Create(node.Text);
NewText.Close();
StreamWriter sw = new StreamWriter(node.Text);
sw.WriteLine(fileIterater.text);
sw.Close();
sw.Dispose();
NewText.Close();
iteraterList.RemoveAt(iteraterList.Count - 1);
}
//存储磁盘fat表
//public void SaveFat()
//{
// for (int i = 0; i < 32; i++)
// {
// FileStream fs = new FileStream("fat.bin", FileMode.Append);
// StreamWriter sw = new StreamWriter(fs);
// string line = "";
// if (Fat[i].busy)
// {
// line = "1 " + Fat[i].Name + " " + Fat[i].next.ToString() + " ";
// if (Fat[i].isStart)
// line += "1";
// else
// line += "0";
// }
// else
// line = "0 0 -1 -1";
// sw.WriteLine(line);
// sw.Close();
// sw.Dispose();
// fs.Close();
// fs.Dispose();
// }
//}
//在fat表中找到文件起始块。
//public int FindinFat(string n)
//{
// for(int i=0;i<32;i++)
// {
// if (Fat[i].isStart && Fat[i].Name == n)
// return i;
// }
// return -1;
//}
//给文件分配块数
//public int CreateFile(int size,string name)
//{
// if (emptyblock == 0)
// return -1;
// int num_block;//所需块数
// if(size%32!=0)
// {
// num_block = size / 32 + 1;
// }
// else
// {
// num_block = size / 32;
// }
// int prev = -1;
// int start = -1;
// if (num_block <= emptyblock)
// {
// for (int i = 0, j = 0; j < num_block; i++)
// {
// if (Fat[i].busy==false)
// {
// Fat[i].busy = true;
// Fat[i].Name = name;
// Fat[i].next = -1;
// if (prev != -1)
// {
// Fat[prev].next = i;
// Fat[i].isStart = false;
// }
// else
// {
// start = i;
// Fat[i].isStart = true;
// }
// prev = i;
// j++;
// }
// }
// emptyblock -= num_block;
// }
// return start;
//}
private void button1_Click(object sender, EventArgs e) //添加目录
{
if (treeView1.SelectedNode == null)
{
MessageBox.Show("请选择一个节点", "提示信息",
MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else
{
//创建一个节点对象，并初始化
fileNode tmp;
tmp = new fileNode();
if (newPathName == "")
{
MessageBox.Show("请输入名称", "提示信息",
MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else
{
tmp.Text = newPathName;
tmp.BackColor = Color.Yellow;
tmp.ToolTipText = "0";
//在TreeView组件中加入子节点
tmp.size = 0;
tmp.address = -1;
if (repeatName(treeView1.SelectedNode.Nodes, tmp.Text))
{
MessageBox.Show("有重复命名，创建失败", "提示信息",
MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
treeView1.SelectedNode.Nodes.Add(tmp);
treeView1.SelectedNode = tmp;
textBox1.Text = "";
FileIterater fileIterater = new FileIterater(tmp, treeView1.SelectedNode, false, false);
iteraterList.Add(fileIterater);
}
}
}
public void RemoveNode()
{
this.last.next = this.next;
this.next.last = this.last;
}
