314214 - getScreenCTM returns bogus results onload

Status: RESOLVED FIXED

(Core :: SVG, defect)

Description

[Jonathan Watt [:jwatt]]

Comment 1

[Jonathan Watt [:jwatt]]

Attachment: testcase

Comment 2

[Jonathan Watt [:jwatt]]

This is happening because GetScreenCTM calls GetViewboxToViewportTransform which calls GetValue on the 'svg' elements 'width' and 'height' SVGLengths. GetValue can't get the user unit value of these lengths during onload when they have a percentage specifiedUnitType (or in fact if they aren't a unitless or px unit). I.e. the SVGLengths haven't yet been given an mContext when onload is called.

Comment 3

[Jonathan Watt [:jwatt]]

And the 'svg' elements 'width' and 'height' SVGLengths don't get an mContext until it's added by the call to SetParentCoordCtxProvider in nsSVGOuterSVGFrame::Init.

Comment 4

[Robert Longson [:longsonr]]

Fixed by check in for bug 409376