public bool Delete(Range range)
{
if (range.LineRange.Length == 0)
{
return true;
}
string fileContents = File.ReadAllText(_filename);
using (StringReader reader = new StringReader(fileContents))
using (TextWriter writer = new StreamWriter(File.Open(_filename, FileMode.Create)))
{
string lineText;
if (SeekTo(reader, writer, range, out lineText))
{
writer.WriteLine(lineText.Substring(0, range.LineRange.Start) + lineText.Substring(range.LineRange.Start + range.LineRange.Length));
}
lineText = reader.ReadLine();
while (lineText != null)
{
writer.WriteLine(lineText);
lineText = reader.ReadLine();
}
}
return true;
}
public bool Insert(Range range, string text, bool addNewline)
{
if (text.Length == 0)
{
return true;
}
string fileContents = File.ReadAllText(_filename);
using (StringReader reader = new StringReader(fileContents))
using (TextWriter writer = new StreamWriter(File.Open(_filename, FileMode.Create)))
{
string lineText;
if (SeekTo(reader, writer, range, out lineText))
{
writer.WriteLine(lineText.Substring(0, range.LineRange.Start) + text + (addNewline ? Environment.NewLine : string.Empty) + lineText.Substring(range.LineRange.Start));
}
lineText = reader.ReadLine();
while (lineText != null)
{
writer.WriteLine(lineText);
lineText = reader.ReadLine();
}
}
return true;
}
public bool Insert(Range position, string text, bool addNewline)
{
try
{
GetEditPointForRange(position)?.Insert(text + (addNewline ? Environment.NewLine : string.Empty));
return true;
}
catch
{
return false;
}
}
public bool Delete(Range range)
{
try
{
GetEditPointForRange(range)?.Delete(range.LineRange.Length);
return true;
}
catch
{
return false;
}
}
public bool Delete(Range range)
{
if (range.LineRange.Length == 0)
{
return true;
}
string fileContents = File.ReadAllText(_filename);
using (StringReader reader = new StringReader(fileContents))
using (TextWriter writer = new StreamWriter(File.Open(_filename, FileMode.Create)))
{
int remainingCharacters = range.LineRange.Length;
int currentStart = range.LineRange.Start;
string lineText;
while (remainingCharacters > 0 && SeekTo(reader, writer, range, out lineText))
{
int trimFromLine = Math.Min(lineText.Length - currentStart, remainingCharacters);
writer.WriteLine(lineText.Substring(0, currentStart) + lineText.Substring(currentStart + trimFromLine));
remainingCharacters -= trimFromLine;
range.LineNumber = 0;
range.LineRange.Start = 0;
range.LineRange.Length = remainingCharacters;
currentStart = 0;
}
lineText = reader.ReadLine();
while (lineText != null)
{
writer.WriteLine(lineText);
lineText = reader.ReadLine();
}
}
return true;
}
private bool SeekTo(StringReader reader, TextWriter writer, Range range, out string lineText)
{
bool success = true;
for (int lineNumber = 0; lineNumber < range.LineNumber; ++lineNumber)
{
string line = reader.ReadLine();
if (line != null)
{
writer.WriteLine(line);
}
else
{
success = false;
break;
}
}
lineText = reader.ReadLine();
if (success)
{
if (lineText != null)
{
if (lineText.Length < range.LineRange.Start)
{
success = false;
writer.WriteLine(lineText);
}
}
}
return success;
}
private EditPoint GetEditPointForRange(Range range)
{
IVsTextLines textLines;
int hr = _view.GetBuffer(out textLines);
if (hr != VSConstants.S_OK || textLines == null)
{
return null;
}
object editPointObject;
hr = textLines.CreateEditPoint(range.LineNumber, range.LineRange.Start, out editPointObject);
EditPoint editPoint = editPointObject as EditPoint;
if (hr != VSConstants.S_OK || editPoint == null)
{
return null;
}
return editPoint;
}