654145 - SVG getBoundingClientRect is affected by stroke-width

Status: RESOLVED INVALID

(Core :: SVG, defect)

Description

[Joao Eiras]

User-Agent:       Opera/9.80 (X11; Linux i686; U; en) Presto/2.8.131 Version/11.10
Build Identifier: Mozilla/5.0 (X11; Linux i686; rv:2.0.1) Gecko/20100101 Firefox/4.0.1

The values returned by getBoudingClientRect on a svg element is affected by stroke-width on that element or its children, while it should not. Stroking should be completely ignored when calculating the values for getBoudingClientRect.

Reproducible: Always

Steps to Reproduce:
1. Open provided TC, should say PASS

Comment 1

[Joao Eiras]

Attachment: Testcase

Passes in recent Chrome and Opera.

Comment 2

[Robert Longson [:longsonr]]

Where is it written that it shouldn't include the stroke-width? If you want something that doesn't include the stroke width then use getBBox.

Comment 3

[Robert Longson [:longsonr]]

IE9 includes the stroke-width and as getBoundingClientRect is a Microsoft thing (http://msdn.microsoft.com/en-us/library/aa703987%28v=vs.85%29.aspx), it makes whatever IE does as right so that makes us right too :-)

Comment 4

[Joao Eiras]

Then this is a clear incompatibility with webkit and Opera, which have much older implementations of SVG than IE. I would presume that getBoudingClientRect in them is just an alias for getBBox.

What made me initially make a testcase for this was that despite stroke-width being included it's severely miscalculated. A stroke-width of 1 unit causes the bounding box to be reported with extra 4 units on each side, which is not true.

Comment 5

[Robert Longson [:longsonr]]

Do raise another bug for the bounds being miscalculated :-)