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/* Parser.cs $
This file is part of the HandBrake source code.
Homepage: <http://handbrake.m0k.org/>.
It may be used under the terms of the GNU General Public License. */
using System;
using System.Collections.Generic;
using System.IO;
using System.Text.RegularExpressions;
using System.Windows.Forms;
namespace Handbrake.Parsing
{
/// <summary>
/// A delegate to handle custom events regarding data being parsed from the buffer
/// </summary>
/// <param name="Sender">The object which raised this delegate</param>
/// <param name="Data">The data parsed from the stream</param>
public delegate void DataReadEventHandler(object Sender, string Data);
/// <summary>
/// A delegate to handle events regarding progress during DVD scanning
/// </summary>
/// <param name="Sender">The object who's raising the event</param>
/// <param name="CurrentTitle">The title number currently being processed</param>
/// <param name="TitleCount">The total number of titiles to be processed</param>
public delegate void ScanProgressEventHandler(object Sender, int CurrentTitle, int TitleCount);
/// <summary>
/// A simple wrapper around a StreamReader to keep track of the entire output from a cli process
/// </summary>
internal class Parser : StreamReader
{
private string m_buffer;
/// <summary>
/// The output from the CLI process
/// </summary>
public string Buffer
{
get
{
return this.m_buffer;
}
}
/// <summary>
/// Raised upon a new line being read from stdout/stderr
/// </summary>
public event DataReadEventHandler OnReadLine;
/// <summary>
/// Raised upon the entire stdout/stderr stream being read in a single call
/// </summary>
public event DataReadEventHandler OnReadToEnd;
/// <summary>
/// Raised upon the catching of a "Scanning title # of #..." in the stream
/// </summary>
public event ScanProgressEventHandler OnScanProgress;
/// <summary>
/// Default constructor for this object
/// </summary>
/// <param name="baseStream">The stream to parse from</param>
public Parser(Stream baseStream) : base(baseStream)
{
this.m_buffer = string.Empty;
}
public override string ReadLine()
{
string tmp = base.ReadLine();
try
{
this.m_buffer += tmp;
Match m = Regex.Match(tmp, "^Scanning title ([0-9]*) of ([0-9]*)");
if (OnReadLine != null)
OnReadLine(this, tmp);
if (m.Success && OnScanProgress != null)
OnScanProgress(this, int.Parse(m.Groups[1].Value), int.Parse(m.Groups[2].Value));
}
catch (Exception exc)
{
MessageBox.Show("Parser.cs - ReadLine " + exc.ToString());
}
return tmp;
}
public override string ReadToEnd()
{
string tmp = base.ReadToEnd();
try
{
this.m_buffer += tmp;
if (OnReadToEnd != null)
OnReadToEnd(this, tmp);
}
catch (Exception exc)
{
MessageBox.Show("Parser.cs - ReadToEnd " + exc.ToString());
}
return tmp;
}
}
}
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