getBoundingBox() returns reference instead of copy of shape's bounding box

[OldGuru]

var z=shape.getBoundingBox()

alert('x'+z.x+'y'+z.y+'w'+z.width+'h'+z.height);

z.x+=30;

z.y+=30;

z.width+=30;

z.height+=30;

z=shape.getBoundingBox()

alert('x'+z.x+'y'+z.y+'w'+z.width+'h'+z.height);

The second alert shows that x, y, width and height properties are each increased by 30.

I tested it for Ellipse and Image. On Firefox, Ellipse had the same problem while Image's bounding box remained unchanged.

On IE both Ellipse and Image were affected and, in the case of Image, its actual size was increased. Both shapes were displaced by (dx:30, dy:30}.

[Eugene Lazutkin]

Probably this is a documentation issue,rather than some erroneous behavior.

[Patrick Ruzand]

The behavior seems correct for me too. getBoundingBox calls should be fast, no need to add extra cost. I have fixed the documentation accordingly.

[Patrick Ruzand]

In [27114]:

fix getBoundingBox documentation. fixes #11241