private LineOutput InstantiateLineOutputInterface()
{
StreamingTextWriter.WriteLineCallback writeCall = new StreamingTextWriter.WriteLineCallback(this.OnWriteLine);
this.writer = new StreamingTextWriter(writeCall, base.Host.CurrentCulture);
int columns = 80;
if (this.width.HasValue)
{
columns = this.width.Value;
}
else
{
try
{
columns = base.Host.UI.RawUI.BufferSize.Width - 1;
}
catch (HostException)
{
}
}
return new TextWriterLineOutput(this.writer, columns);
}
/// <summary>
/// one time initialization: acquire a screen host interface
/// by creating one on top of a stream
/// </summary>
private LineOutput InstantiateLineOutputInterface()
{
// set up the streaming text writer
StreamingTextWriter.WriteLineCallback callback = new StreamingTextWriter.WriteLineCallback(this.OnWriteLine);
_writer = new StreamingTextWriter(callback, Host.CurrentCulture);
// compute the # of columns available
int computedWidth = 120;
if (_width != null)
{
// use the value from the command line
computedWidth = _width.Value;
}
else
{
// use the value we get from the console
try
{
// NOTE: we subtract 1 because we want to properly handle
// the following scenario:
// MSH>get-foo|format-table|out-string
// in this case, if the computed width is (say) 80, get-content
// would cause a wrapping of the 80 column long raw strings.
// Hence we set the width to 79.
computedWidth = this.Host.UI.RawUI.BufferSize.Width - 1;
}
catch (HostException)
{
// non interactive host
}
}
// use it to create and initialize the Line Output writer
TextWriterLineOutput twlo = new TextWriterLineOutput(_writer, computedWidth);
// finally have the LineOutput interface extracted
return (LineOutput)twlo;
}