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class com.senocular.drawing.RecordedDrawing {
public var target:Object;
public var enabled:Boolean = true;
public var history:Array;
function RecordedDrawing(target:Object, enabled:Boolean){
this.target = target;
if (enabled != undefined) this.enabled = enabled;
this.history = new Array();
}
public function clear(Void):Void {
this.history = new Array();
}
public function lineStyle(thickness:Number, rgb:Number, alpha:Number):Void {
this.record("lineStyle", arguments, this.enabled);
}
public function beginFill(rgb:Number,alpha:Number):Void {
this.record("beginFill", arguments, this.enabled);
}
public function beginGradientFill(fillType:String, colors:Array, alphas:Array, ratios:Array, matrix:Object):Void {
this.record("beginGradientFill", arguments, this.enabled);
}
public function moveTo(x:Number, y:Number):Void {
this.record("moveTo", arguments, this.enabled);
}
public function lineTo(x:Number, y:Number):Void {
this.record("lineTo", arguments, this.enabled);
}
public function curveTo(cx:Number, cy:Number, x:Number, y:Number):Void {
this.record("curveTo", arguments, this.enabled);
}
public function endFill(Void):Void {
this.record("endFill", arguments, this.enabled);
}
public function recall(target:Object):Void {
if (!target) target = this.target;
var n:Number = this.history.length;
var i:Number;
for (i=0; i<n; i++){
this.enact(this.history[i], target);
}
}
public function forget(steps:Number):RecordedDrawing {
var forgotten:RecordedDrawing = new RecordedDrawing(this.target, this.enabled);
var pos:Number = this.history.length - steps;
if (pos <= 0){
forgotten.history = this.history;
this.history = new Array();
return forgotten;
}
var past:Array = this.history.slice(pos);
this.history.length = pos;
forgotten.history = past;
return forgotten;
}
private function record(method:String, args:Array, perform:Boolean):Void {
var entry:Object = {method:method, args:args};
this.history.push(entry);
if (perform) this.enact(entry, this.target);
}
private function enact(entry:Object, target:Object){
target[entry.method].apply(target, entry.args);
}
}
