partial insert support

botanjs/src/Components/Vim/Actions/INSERT.js

@@ -5,6 +5,17 @@
 	var debug = __import( "System.Debug" );
 	var Mesg = __import( "Components.Vim.Message" );
 
+	var Translate = function( c )
+	{
+		switch( c )
+		{
+			case "Tab":
+				return "\t";
+			default:
+				return c;
+		}
+	};
+
 	/** @type {Components.Vim.Cursor.IAction} */
 	var INSERT = function( Cursor )
 	{
@@ -19,7 +30,41 @@
 	INSERT.prototype.handler = function( e )
 	{
 		e.preventDefault();
-		var inputChar = e.key;
+		var inputChar = Translate( e.key );
+
+		if( inputChar.length != 1 ) return;
+
+		var cur = this.cursor;
+		var feeder = cur.feeder;
+
+		var line = cur.getLine();
+		var n = line.lineNum;
+
+		var cont = feeder.content;
+
+		var f = 0;
+		if( 0 < n )
+		{
+			f = cont.indexOf( "\n" );
+			for( i = 1; f != -1 && i < n; i ++ )
+			{
+				f = cont.indexOf( "\n", f + 1 );
+			}
+
+			if( this.cursor.feeder.wrap )
+			{
+				// wordwrap offset
+				f ++;
+			}
+		}
+
+		f += cur.aX;
+
+		feeder.content = cont.substring( 0, f ) + inputChar +  cont.substring( f );
+		feeder.pan();
+		feeder.dispatcher.dispatchEvent( new BotanEvent( "VisualUpdate" ) );
+
+		cur.moveX( 1 );
 	};
 
 	INSERT.prototype.getMessage = function()