///
/// Copyright © 2003-2008 JetBrains s.r.o.
/// You may distribute under the terms of the GNU General Public License, as published by the Free Software Foundation, version 2 (see License.txt in the repository root folder).
///
using System;
using System.Diagnostics;
using System.IO;
using System.Text;
using System.Threading;
using System.Windows.Forms;
using JetBrains.Omea.Base;
using JetBrains.Omea.OpenAPI;
namespace JetBrains.Omea.ExcelDocPlugin
{
///
/// Pane for displaying Excel documents.
///
public class ExcelDisplayPane : UserControl, IDisplayPane2
{
private System.ComponentModel.IContainer components;
private WordPtr[] _wordsToHighlight;
private IResource _resource;
private string _sourceFileName;
private Process _converterProcess;
private StreamReader _converterOutputReader;
private StringWriter _converterOutputWriter;
private bool _killedConverter = false;
public ExcelDisplayPane()
{
// This call is required by the Windows.Forms Form Designer.
InitializeComponent();
Controls.Add( Core.WebBrowser );
Core.WebBrowser.Dock = DockStyle.Fill;
Core.WebBrowser.Visible = true;
}
///
/// Clean up any resources being used.
///
protected override void Dispose( bool disposing )
{
if( disposing )
{
if(components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Component Designer generated code
///
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
///
private void InitializeComponent()
{
//
// ExcelDisplayPane
//
this.Name = "ExcelDisplayPane";
this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.ExcelDisplayPane_KeyDown);
}
#endregion
public Control GetControl()
{
return this;
}
public void DisplayResource( IResource resource )
{
// If we got a sign that the resource's file was not parsed
string errorBody = resource.GetPropText( Core.Props.LastError );
if( !String.IsNullOrEmpty( errorBody ) )
{
ShowError( errorBody );
}
else
{
try
{
_sourceFileName = Core.FileResourceManager.GetSourceFile( resource );
_resource = resource;
LoadHtml( _sourceFileName );
}
catch( Exception ex )
{
ShowError( "Failed to open Excel document \"" + _sourceFileName + "\". " + ex.Message );
}
}
}
private void ExcelDisplayPane_KeyDown(object sender, KeyEventArgs e)
{
e.Handled = Core.ActionManager.ExecuteKeyboardAction(
new ActionContext( ActionContextKind.Keyboard, this, _resource.ToResourceList() ), e.KeyData );
}
private static void ShowError( string error )
{
error = error.Replace( "&", "&" ).Replace( "\"", """ ).Replace( "<", "<" ).Replace( ">", ">" );
Core.WebBrowser.Visible = true;
Core.WebBrowser.ShowHtml( "" + error + "
", WebSecurityContext.Trusted, null );
}
private void LoadHtml( string fileName )
{
Core.WebBrowser.Visible = true;
Core.WebBrowser.ShowHtml( "Please wait while the file is being converted…", WebSecurityContext.Trusted, null );
_killedConverter = false;
_converterProcess = ExcelDocPlugin.CreateConverterProcess( fileName, false );
_converterProcess.EnableRaisingEvents = true;
_converterProcess.Exited += _converterProcess_OnExited;
try
{
if(!_converterProcess.Start())
throw new Exception();
}
catch
{
_converterProcess = null;
Core.UIManager.QueueUIJob( new ShowErrorDelegate( ShowError ),
"Failed to convert Excel file to HTML. Cannot start the convertion process: converter is not found.");
return;
}
_converterOutputReader = new StreamReader( _converterProcess.StandardOutput.BaseStream,
Encoding.UTF8 );
_converterOutputWriter = new StringWriter();
new Thread( ProcessConverterOutput ).Start();
}
private void ProcessConverterOutput()
{
try
{
string str;
while ((str = _converterOutputReader.ReadLine()) != null)
{
_converterOutputWriter.WriteLine( str );
}
}
finally
{
_converterOutputWriter.Close();
}
}
private void _converterProcess_OnExited( object sender, EventArgs e )
{
if ( _killedConverter || null == _converterProcess)
return;
if ( _converterProcess.ExitCode == 0 )
{
Core.WebBrowser.ShowHtml( _converterOutputWriter.ToString(), WebSecurityContext.Restricted, _wordsToHighlight );
_wordsToHighlight = null;
}
else
{
string error = Utils.StreamReaderReadToEnd( _converterProcess.StandardError );
Core.UIManager.QueueUIJob( new ShowErrorDelegate( ShowError ),
"Failed to convert Excel file to HTML. " + error );
}
Core.FileResourceManager.CleanupSourceFile( _resource, _sourceFileName );
}
private delegate void ShowErrorDelegate( string error );
public void HighlightWords( WordPtr[] words )
{
words = DocumentSection.RestrictResults( words, DocumentSection.BodySection );
Core.WebBrowser.HighlightWords( words, 0 );
_wordsToHighlight = words;
}
public void EndDisplayResource( IResource resource )
{
if ( _converterProcess != null && !_converterProcess.HasExited )
{
// In the case the process was already killed - nothing to do
try { _converterProcess.Kill(); }
catch( InvalidOperationException ){}
_killedConverter = true;
}
}
public void DisposePane()
{
Controls.Remove( Core.WebBrowser );
Core.WebBrowser.Visible = true;
Dispose();
}
public string GetSelectedText( ref TextFormat format )
{
format = TextFormat.Html;
return Core.WebBrowser.SelectedHtml;
}
public string GetSelectedPlainText()
{
return Core.WebBrowser.SelectedText;
}
public bool CanExecuteCommand( string command )
{
return Core.WebBrowser.CanExecuteCommand( command );
}
public void ExecuteCommand( string command )
{
Core.WebBrowser.ExecuteCommand( command );
}
public void DisplayResource( IResource resource, WordPtr[] wordsToHighlight )
{
_wordsToHighlight = DocumentSection.RestrictResults( wordsToHighlight, DocumentSection.BodySection );
DisplayResource( resource );
}
}
}