How do I set up my multiline wordWrap TextField to automatically resize its width when height is set? - actionscript-3

Question

I want to create a textfield extension that:
When width is set, automatically resize height by the content of text. Easy done by autosize left, word wrap true, multiline true.
When height is set, automatically resize width by the content of text. Here is my problem.
When both width and height set aren't a case I am interested in.
I've tried several things off the internet, I am stumped.

Answer 1

General solution is impossible, as if the text field contains too many newlines to display within a given height, no matter what width you assign, the text field will be unable to display all the lines. Partial solution is presented by greetification, but it lacks some features one should be aware of. First, no matter what you do, you should not set height to value less than font height, or the text field will not be able to display a single line. Second, if wordWrap is set to false, and multiline to true, the resultant textWidth is the largest desirable width for your text field, so if you adjust the width like greetification advises, stop once you reach the recorded textWidth, as further increases are pointless.
function setHeight(newHeight:Number):void {
var tw:Number;
var th:Number;
if (myTextField.wordwrap) {
myTextField.wordwrap=false;
tw=myTextField.textWidth;
th=myTextField.textHeight;
myTextField.wordwrap=true;
} else {
tw=myTextField.textWidth;
th=myTextField.textHeight;
}
if (newHeight<th) newHeight=th+2; // as below
myTextField.height = newHeight;
while((myTextField.textHeight > myTextField.height)&&(myTextField.width<tw)) {
myTextField.width += 100;
}
if (myTextField.width>tw) myTextField.width=tw+2; // "2" depends on text format
// and other properties, so either play with it or assume a number big enough
}

Answer 2

Not the most elegant solution, but it should work:
function setHeight(newHeight:Number):void {
myTextField.height = newHeight;
while(myTextField.textHeight > myTextField.height) {
myTextField.width += 100;
}
}