Itext with style but no fill and no stroke

[asturur]

Version

1.6.0

Test Case

http://jsfiddle.net/Da7SP/39/

Steps to reproduce

Draw some iText with no fill and no stroke properties, put fill and stroke in the style instead

Expected Behavior

Text should render

Actual Behavior

Text does not render

This happen because we have a check on stroke and fill before going trought rendering.
There is a ambiguous property in Itext "_skipFillStrokeCheck" that is default to false.

Instead of setting it to true to force rendering of this kind of text, it would be better to add a proper check before rendering:

if ((!this.stroke || this.strokeWidth === 0) && this.isEmptyStyles()) {
        return;
      }
if ((!this.fill) && this.isEmptyStyles()) {
        return;
      }

and remove _skipFillStrokeCheck that is of no clear use to me.

Normal text class has no isEmptyStyles functions.

We could do in two way:

1. check for a lazy !this.styles instead of isEmptyStyles()
2. add a isEmptyStyles function that return true for the Text class

@kangax and @Kienz if you have 2 minutes i need your opinion on this.

[asturur]

we could do even better and add a parameter 'property' to isEmptyStyle to return true if the given property is not found in the style object.

So we can have a isEmptyStyle('font-family') isEmptyStyle('stroke') isEmptyStyle('fill')