private void RecoverFile(FCB rootNode, int BlockIndex, string systemPath)
{
disk.disk[BlockIndex - 1].data = "";
disk.bitmap[BlockIndex - 1] = true;
StreamReader reader = new StreamReader(systemPath + "\\DataBlock_" + Convert.ToString(BlockIndex) + ".dat");
disk.disk[BlockIndex - 1].type = Convert.ToInt16(reader.ReadLine());
disk.disk[BlockIndex - 1].data += reader.ReadLine();
disk.disk[BlockIndex - 1].nextBlock = Convert.ToInt16(reader.ReadLine());
if (disk.disk[BlockIndex - 1].nextBlock != -1)
{
RecoverFile(rootNode, disk.disk[BlockIndex - 1].nextBlock, systemPath);
}
}
public void RemoveFCB(FCB targetFolder)
{
if (targetFolder == null)
{
return;
}
disk[targetFolder.blockPosID - 1].FCBList.Remove(targetFolder);
//如果此时该disk内PCBList已空
//就完全初始化
if (disk[targetFolder.blockPosID - 1].FCBList.Count() == 0)
{
disk[targetFolder.blockPosID - 1].FCBList = null;
disk[targetFolder.blockPosID - 1].type = -1;
bitmap[targetFolder.blockPosID - 1] = false;
}
}
private void NewFile_Button_Click(object sender, RoutedEventArgs e)
{
FileAdd fileAddWindow = new FileAdd();
fileAddWindow.ShowDialog();
string name = fileAddWindow._newFileName;
//窗体直接关闭
if (name == null)
{
return;
}
//命名含有非法字符检测
if (name.Contains(" ") || name == "")
{
System.Windows.MessageBox.Show("含有非法字符");
return;
}
//重名检测
if (FindFCBName(name) != null)
{
System.Windows.MessageBox.Show("“" + name + "”已存在");
return;
}
string newFileName = fileAddWindow._newFileName;
string newFileContent = fileAddWindow._newFileContent;
int size = newFileContent.Count() / BLOCK_CONTENT_LENGTH + 1;
FCB newFile = new FCB(Type.File, newFileName, size, ++FCBID);
newFile.father = currentDirectory;
currentDirectory.fileSon.Add(newFile);
UpdateAncestorSize(newFile, size);
disk.AddNewFCB(newFile);
disk.AddNewFileContent(newFile, newFileContent);
UpdateCurrentDir();
UpdateFCBList();
}
public string ExtractFileContent(FCB targetFile)
{
string wholeContent = "";
int currentBlockID = targetFile.beginBlockID;
while (true)
{
wholeContent += disk[currentBlockID - 1].data;
if (disk[currentBlockID - 1].nextBlock == -1)
{
break;
}
else
{
currentBlockID = disk[currentBlockID - 1].nextBlock;
}
}
return(wholeContent);
}
private void FCBList_MouseDoubleClick(object sender, MouseButtonEventArgs e)
{
//无选中项目
if (FCBList.SelectedItem == null)
{
return;
}
string targetName = FCBList.SelectedItem.ToString();
for (int i = 0; i < currentDirectory.folderSon.Count(); i++)
{
if (currentDirectory.folderSon[i].name == targetName)
{
currentDirectory = currentDirectory.folderSon[i];
UpdateCurrentDir();
UpdateFCBList();
break;
}
}
for (int i = 0; i < currentDirectory.fileSon.Count(); i++)
{
if (currentDirectory.fileSon[i].name == targetName)
{
int beforeSize = currentDirectory.fileSon[i].size;
FileShow fileShow = new FileShow(disk, currentDirectory.fileSon[i]);
fileShow.ShowDialog();
int afterSize = currentDirectory.fileSon[i].size;
UpdateAncestorSize(currentDirectory.fileSon[i], afterSize - beforeSize);
UpdateCurrentDir();
break;
}
}
}
private void NewFolder_Button_Click(object sender, RoutedEventArgs e)
{
FolderAdd folderAddWindow = new FolderAdd();
folderAddWindow.ShowDialog();
string name = folderAddWindow._newFolderName;
//窗口直接关闭的情况
if (name == null)
{
return;
}
//命名含有非法字符检测
if (name.Contains(" ") || name == "")
{
System.Windows.MessageBox.Show("含有非法字符");
return;
}
//重名检测
if (FindFCBName(name) != null)
{
System.Windows.MessageBox.Show("“" + name + "”已存在");
return;
}
string newFolderName = folderAddWindow._newFolderName;
FCB newFolder = new FCB(Type.Folder, newFolderName, 1, ++FCBID);
newFolder.father = currentDirectory;
currentDirectory.folderSon.Add(newFolder);
UpdateAncestorSize(newFolder, newFolder.size);
disk.AddNewFCB(newFolder);
UpdateCurrentDir();
UpdateFCBList();
}
private FCB Recursion_Serach_Folder(FCB rootNode, int targetID)
{
if (rootNode.ID == targetID)
{
return(rootNode);
}
for (int i = 0; i < rootNode.folderSon.Count(); i++)
{
FCB currentNode = Recursion_Serach_Folder(rootNode.folderSon[i], targetID);
if (currentNode == null)
{
continue;
}
if (currentNode.ID == targetID)
{
return(currentNode);
}
}
return(null);
}
public void AddNewFCB(FCB newFolder)
{
int posID = FindFreeBlock(1);
if (posID == -1)
{
System.Windows.MessageBox.Show("文件系统已满!");
return;
}
bitmap[posID - 1] = true; //更新位图
disk[posID - 1].type = 1;
newFolder.blockPosID = posID;
//新Block鉴定
if (disk[posID - 1].FCBList == null)
{
disk[posID - 1].FCBList = new List <FCB>();
}
disk[posID - 1].FCBList.Add(newFolder); //更新disk
}
private void SaveAndExit_Button_Click(object sender, RoutedEventArgs e)
{
string systemPath = "";
FolderBrowserDialog folderBrowser = new FolderBrowserDialog();
folderBrowser.RootFolder = Environment.SpecialFolder.Desktop;
if (folderBrowser.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
systemPath = folderBrowser.SelectedPath;
}
else if (folderBrowser.ShowDialog() == System.Windows.Forms.DialogResult.Cancel)
{
return;
}
//清空当前文件夹
SystemFolderClear(systemPath);
//新建文件流指针
StreamWriter writer;
writer = new StreamWriter(systemPath + "\\BlockNum.dat", false);
writer.WriteLine(Convert.ToString(blockNum), false);
writer.Close();
for (int i = 0; i < blockNum; i++)
{
Block currentBlock = disk.disk[i];
//因为type为-1的Block没有存储任何信息可以直接还原
//所以不对其做存储操作
if (currentBlock.type == -1)
{
}
//将所有type为1的Block存储在单个文件内
//以保证目录树的完整还原
else if (currentBlock.type == 1)
{
writer = new StreamWriter(systemPath + "\\FCBBlock.dat", true);
for (int j = 0; j < currentBlock.FCBList.Count(); j++)
{
FCB currentFCB = disk.disk[i].FCBList[j];
//文件型FCB
if (currentFCB.type == Type.File)
{
writer.WriteLine(currentFCB.ID + " " + 2 + " " + currentFCB.name + " " + currentFCB.size + " " +
currentFCB.blockPosID + " " + currentFCB.beginBlockID + " " + currentFCB.endBlockID + " ");
}
//文件夹型FCB
else if (currentFCB.type == Type.Folder)
{
writer.Write(currentFCB.ID + " " + 1 + " " + currentFCB.name + " " +
currentFCB.size + " " + currentFCB.blockPosID + " ");
writer.Write("(");
for (int k = 0; k < currentFCB.folderSon.Count(); k++)
{
writer.Write(currentFCB.folderSon[k].ID + " ");
}
writer.Write(")");
writer.Write("(");
for (int k = 0; k < currentFCB.fileSon.Count(); k++)
{
writer.Write(currentFCB.fileSon[k].ID + " ");
}
writer.Write(") ");
writer.WriteLine("");
}
}
writer.Close();
}
//将所有type为2的Block存储在不同文件中
else if (currentBlock.type == 2)
{
writer = new StreamWriter(systemPath + "\\DataBlock_" + Convert.ToString(currentBlock.ID) + ".dat", false);
writer.WriteLine(currentBlock.type);
//writer.WriteLine(currentBlock.ID); //不需要
writer.WriteLine(currentBlock.data);
writer.WriteLine(currentBlock.nextBlock);
writer.Close();
}
}
this.Close();
}
//根据路径名找到FCBBLock.dat 文件
//根据文件复原加载系统的FCB tree
private void SystemRecover(string systemPath)
{
rootFolder = new FCB(Type.Folder, "root", ++FCBID);
//basic Information Recover
RecoverTree(rootFolder, 1, null, systemPath);
}
private void RecoverTree(FCB rootNode, int FCBID, FCB father, string systemPath)
{
string fullSystemPath = systemPath + "\\FCBBlock.dat";
rootNode.father = father;
rootNode.fileSon = new List <FCB>();
rootNode.folderSon = new List <FCB>();
StreamReader reader = new StreamReader(fullSystemPath);
string singleLine = reader.ReadLine();
while (Convert.ToInt16(singleLine.Substring(0, singleLine.IndexOf(" ") + 1)) != FCBID)
{
singleLine = reader.ReadLine();
}
rootNode.ID = Convert.ToInt16(singleLine.Substring(0, singleLine.IndexOf(" ")));
singleLine = singleLine.Remove(0, singleLine.IndexOf(" ") + 1);
rootNode.type = (Type)Convert.ToInt16(singleLine.Substring(0, singleLine.IndexOf(" "))); ///////////////////problem
singleLine = singleLine.Remove(0, singleLine.IndexOf(" ") + 1);
rootNode.name = singleLine.Substring(0, singleLine.IndexOf(" "));
singleLine = singleLine.Remove(0, singleLine.IndexOf(" ") + 1);
rootNode.size = Convert.ToInt16(singleLine.Substring(0, singleLine.IndexOf(" ")));
singleLine = singleLine.Remove(0, singleLine.IndexOf(" ") + 1);
rootNode.blockPosID = Convert.ToInt16(singleLine.Substring(0, singleLine.IndexOf(" ")));
singleLine = singleLine.Remove(0, singleLine.IndexOf(" ") + 1);
//更新disk 的type
disk.disk[rootNode.blockPosID - 1].type = 1;
//更新disk 内Block的FCBList
if (disk.disk[rootNode.blockPosID - 1].FCBList == null)
{
disk.disk[rootNode.blockPosID - 1].FCBList = new List <FCB>();
}
disk.disk[rootNode.blockPosID - 1].FCBList.Add(rootNode);
//更新位图
disk.bitmap[rootNode.blockPosID - 1] = true;
if (rootNode.type == Type.File)
{
//父节点添加该节点指针
father.fileSon.Add(rootNode);
rootNode.beginBlockID = Convert.ToInt16(singleLine.Substring(0, singleLine.IndexOf(" ")));
singleLine = singleLine.Remove(0, singleLine.IndexOf(" ") + 1);
rootNode.endBlockID = Convert.ToInt16(singleLine.Substring(0, singleLine.IndexOf(" ")));
singleLine = singleLine.Remove(0, singleLine.IndexOf(" ") + 1);
RecoverFile(rootNode, rootNode.beginBlockID, systemPath);
}
else if (rootNode.type == Type.Folder)
{
//父节点添加该节点指针
if (father != null)
{
father.folderSon.Add(rootNode);
}
//提取子文件夹FCB 的索引
List <int> folderSonIndex = new List <int>();
singleLine = singleLine.Remove(0, singleLine.IndexOf("(") + 1);
while (!singleLine.Substring(0, 1).Equals(")"))
{
folderSonIndex.Add(Convert.ToInt16(singleLine.Substring(0, singleLine.IndexOf(" "))));
singleLine = singleLine.Remove(0, singleLine.IndexOf(" ") + 1);
}
singleLine = singleLine.Remove(0, 1);
//递归添加子节点
for (int i = 0; i < folderSonIndex.Count(); i++)
{
FCB newFolder = new FCB(Type.Folder, null, 1, folderSonIndex[i]);
RecoverTree(newFolder, folderSonIndex[i], rootNode, systemPath);
}
//提取子文件FCB 的索引
List <int> fileSonIndex = new List <int>();
singleLine = singleLine.Remove(0, singleLine.IndexOf("(") + 1);
while (!singleLine.Substring(0, 1).Equals(")"))
{
fileSonIndex.Add(Convert.ToInt16(singleLine.Substring(0, singleLine.IndexOf(" "))));
singleLine = singleLine.Remove(0, singleLine.IndexOf(" ") + 1);
}
singleLine = singleLine.Remove(0, 1);
//根据Index 恢复该FCB的文件子集
for (int i = 0; i < fileSonIndex.Count(); i++)
{
FCB newFile = new FCB(Type.File, null, 1, fileSonIndex[i]);
RecoverTree(newFile, fileSonIndex[i], rootNode, systemPath);
}
}
return;
}