Cleanup

source/Form1.cs

@@ -0,0 +1,91 @@
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Linq;
+using System.Text.RegularExpressions;
+using System.Windows.Forms;
+namespace regexer {
+    public partial class Form1 : Form {
+        private Regex _r;
+        public Form1() { this.InitializeComponent(); }
+
+        private bool CreateRegex( bool msg ) {
+            try {
+                var s = this.txt_regex.Text;
+                if ( string.IsNullOrWhiteSpace( s ) )
+                    return false;
+                this._r = new Regex( s );
+                return true;
+            }
+            catch {
+                if ( msg ) MessageBox.Show( @"Wrong regex" );
+                return false;
+            }
+        }
+
+        private void update_input_box( IEnumerable<Match> v1 ) {
+            try {
+                this.ResumeLayout();
+                this.txt_in.SuspendLayout();
+                int selPos = this.txt_in.SelectionStart, sellen = this.txt_in.SelectionLength;
+                this.txt_in.SuspendLayout();
+                this.txt_in.SelectAll();
+                this.txt_in.SelectionBackColor = Color.White;
+                foreach ( var keyWordMatch in v1 ) {
+                    this.txt_in.Select( keyWordMatch.Index, keyWordMatch.Length );
+                    this.txt_in.SelectionBackColor = Color.Yellow;
+                }
+                this.txt_in.SelectionStart = selPos;
+                this.txt_in.SelectionLength = sellen;
+                this.txt_in.ResumeLayout();
+            }
+            finally {
+                Application.DoEvents();
+                this.ResumeLayout();
+                this.txt_in.ResumeLayout();
+            }
+        }
+
+        private void update_output( IEnumerable<Match> v1 ) {
+            var f = this.txt_replace_what.Text;
+            var t = this.txt_replace_with.Text;
+            var v = this.rd_match.Checked ? v1.Select( a => a.ToString() ).ToArray() : ( this.txt_in.Lines ).ToArray().Where( a => this._r.Match( a ).Index > 0 ).ToArray();
+            if ( !String.IsNullOrEmpty( f ) )
+                v = v.Select( a => a.Replace( f, t ) ).ToArray();
+            this.txt_out.Lines = v.ToArray();
+        }
+
+        private void auto_up() {
+            if ( this.chk_onthefly.Checked )
+                if ( this.CreateRegex( false ) )
+                    this.update_results();
+        }
+
+        private void update_results() {
+            try {
+                var v1 = ( from Match m in this._r.Matches( this.txt_in.Text ) select m ).ToArray();
+                this.update_output( v1 );
+                this.update_input_box( v1 );
+            }
+            catch {}
+        }
+
+        private void btn_go_Click( object sender, EventArgs e ) {
+            if ( this.CreateRegex( true ) ) {
+                this.txt_regex.Items.Insert( 0, this.txt_regex.Text );
+                this.update_results();
+            }
+        }
+
+        private void txt_regex_TextChanged( object sender, EventArgs e ) { this.auto_up(); }
+        private void txt_in_TextChanged( object sender, EventArgs e ) { this.auto_up(); }
+
+        private void rd_match_CheckedChanged( object sender, EventArgs e ) { this.auto_up(); }
+
+        private void rd_grep_CheckedChanged( object sender, EventArgs e ) { this.auto_up(); }
+
+        private void txt_replace_what_TextChanged( object sender, EventArgs e ) { this.auto_up(); }
+
+        private void txt_replace_with_TextChanged( object sender, EventArgs e ) { this.auto_up(); }
+    }
+}