FileInput.cs

   1 using System;
   2 using System.IO;
   3 using System.Collections;
   4 using Cairo;
   5 using Gtk;
   6 using Gdk;
   7
   8 class FileSelector : TextInput {
   9         private string filestr;
  10
  11         public FileSelector() : base(Directory.GetCurrentDirectory() + System.IO.Path.DirectorySeparatorChar) {
  12                 Complete();
  13         }
  14
  15         protected override void draw(Cairo.Context gr, int width, int height) {
  16                 base.draw(gr, width, height);
  17
  18                 gr.LineWidth = 1.0;
  19                 gr.NewPath();
  20                 gr.MoveTo(0, 13.5);
  21                 gr.LineTo(width, 13.5);
  22                 gr.Stroke();
  23
  24                 if (filestr != null) {
  25                         Pango.Layout layout = new Pango.Layout(this.PangoContext);
  26                         layout.Width = Pango.Units.FromPixels(width);
  27                         layout.FontDescription = Pango.FontDescription.FromString("Courier 12");
  28                         layout.Wrap = Pango.WrapMode.WordChar;
  29                         layout.SetMarkup(filestr);
  30                         gr.MoveTo(0, 15);
  31                         Pango.CairoHelper.ShowLayout(gr, layout);
  32                 }
  33         }
  34
  35         [GLib.ConnectBefore()]
  36         public override void KeyPress(object o, KeyPressEventArgs args) {
  37                 base.KeyPress(o, args);
  38                 switch(args.Event.Key) {
  39                 case Gdk.Key.Tab:
  40                         Complete();
  41                         QueueDraw();
  42                         break;
  43                 }
  44         }
  45
  46         private void Complete() {
  47                 string dir = System.IO.Path.GetDirectoryName(Value);
  48                 string search = System.IO.Path.GetFileName(Value);
  49                 string[] files = Directory.GetFileSystemEntries(dir, search + "*");
  50                 filestr = null;
  51                 if (files.Length == 1 && Directory.Exists(files[0])) {
  52                         Value = files[0] + System.IO.Path.DirectorySeparatorChar;
  53                         Complete();
  54                         return;
  55                 } else if (files.Length > 0) {
  56                         int i;
  57                         filestr = "";
  58
  59                         string common = System.IO.Path.GetFileName(files[0]);
  60
  61                         for (i = 0; i < files.Length; i++) {
  62                                 files[i] = System.IO.Path.GetFileName(files[i]);
  63                                 common = CommonPart(common, files[i]);
  64                         }
  65
  66                         Value = dir + System.IO.Path.DirectorySeparatorChar + common;
  67                         cursor = Value.Length;
  68
  69                         for (i = 0; i < files.Length; i++) {
  70                                 string f = files[i];
  71                                 filestr += "<span color=\"#7F7F7F\">" + common + "</span>" + f.Substring(common.Length) + "  ";
  72                         }
  73                 }
  74         }
  75
  76         private string CommonPart(string s1, string s2) {
  77                 CharEnumerator i1 = s1.GetEnumerator();
  78                 CharEnumerator i2 = s2.GetEnumerator();
  79                 int c = 0;
  80
  81                 while (i1.MoveNext() && i2.MoveNext()) {
  82                         if (i1.Current != i2.Current) break;
  83                         c++;
  84                 }
  85                 return s1.Substring(0, c);
  86         }
  87 }