source: branches/HeuristicLab.Problems.GPDL/HeuristicLab.Problems.GPDL.Views/3.4/CodeEditor.xaml.cs @ 9674

using System.Collections.Generic;
using System.IO;
using System.Windows.Controls;
using System.Windows.Input;
using System.Xml;
using ICSharpCode.AvalonEdit.CodeCompletion;
using ICSharpCode.AvalonEdit.Highlighting;
using ICSharpCode.AvalonEdit.Highlighting.Xshd;

namespace HeuristicLab.Problems.GPDL.Views {
  /// <summary>
  /// Interaction logic for CodeEditor.xaml
  /// </summary>
  public partial class CodeEditor : UserControl {
    public string syntaxHighlighting { get; set; }
    private bool controlHeld = false;
    private CompletionWindow completionWindow;
    private ColorizeErrors errorLineTransformer;

    public CodeEditor() {
      InitializeComponent();

      LoadSyntaxHighlighting();

      // for auto-completion
      textEditor.TextArea.TextEntered += textEditor_TextArea_TextEntered;
      // show errors visually
      errorLineTransformer = new ColorizeErrors();
      textEditor.TextArea.TextView.LineTransformers.Add(errorLineTransformer);
    }

    private void textEditor_TextArea_TextEntered(object sender, TextCompositionEventArgs e) {
      if (e.Text == ".") {
        // Open code completion after the user has pressed dot:
        completionWindow = new CompletionWindow(textEditor.TextArea);
        IList<ICompletionData> data = completionWindow.CompletionList.CompletionData;
        data.Add(new MyCompletionData("Item1"));
        data.Add(new MyCompletionData("Item2"));
        data.Add(new MyCompletionData("Item3"));
        completionWindow.Show();
        completionWindow.Closed += delegate {
          completionWindow = null;
        };
      }
    }


    private void LoadSyntaxHighlighting() {
      textEditor.ShowLineNumbers = true;

      using (var s = new StringReader(Properties.Resources.GPDL)) {
        using (XmlTextReader reader = new XmlTextReader(s)) {
          textEditor.SyntaxHighlighting = HighlightingLoader.Load(reader, HighlightingManager.Instance);

        }
      }
    }

    private void textEditor_MouseWheel(object sender, System.Windows.Input.MouseWheelEventArgs e) {
    }

    private void textEditor_KeyDown(object sender, System.Windows.Input.KeyEventArgs e) {
      if (e.Key == Key.LeftCtrl || e.Key == Key.RightCtrl) controlHeld = true;
    }

    private void textEditor_KeyUp(object sender, KeyEventArgs e) {
      controlHeld = false;
    }

    internal void SetLexError(string msg, int line, int col) {
      errorLineTransformer.MarkLexError(msg, line, col);
      textEditor.InvalidateVisual();
    }

    internal void SetSynError(string msg, int line, int col) {
      errorLineTransformer.MarkSynError(msg, line, col);
      textEditor.InvalidateVisual();
    }

    internal void ClearErrors() {
      errorLineTransformer.ClearErrors();
      textEditor.InvalidateVisual();
    }

    private void textEditor_PreviewMouseWheel(object sender, MouseWheelEventArgs e) {
      if (!controlHeld) return;
      if (e.Delta > 0)
        textEditor.FontSize += 1;
      else textEditor.FontSize -= 1;
      e.Handled = true;
    }
  }
}