SVG: Always set SVG dimentions

[utopiabound]

• What does this PR do?

This always sets a value for SVG size which accounts for SVG files that do not have a viewport.

Fixes #1168

• Screenshots (if applicable)

Without Patch (showing SVG's without viewport elements):

With Patch (Working as well as 1.1.1 did with the same SVGs):

[ThomasAdam]

Hi @utopiabound

Not sure about this. This was my original approach to handling this, and it broke SVG rendering for some versions of librsvg.

I'm inclined to just leave things as-is, and allow people to correctly "update" their SVG icons the way they're probably supposed to.

[utopiabound]

Hi @utopiabound

Not sure about this. This was my original approach to handling this, and it broke SVG rendering for some versions of librsvg.

Do you recall with version of librsvg? This code is only for version 2.52.0+. This is working for me on 2.59.2.

I'm inclined to just leave things as-is, and allow people to correctly "update" their SVG icons the way they're probably supposed to.

There are a lot of upstream icons that don't have viewbox defined, I do not believe it's a required field in the standard, and it just leaves holes in menus if FVWM doesn't even try to render them. This patch does the right thing if that's available but then falls back to the previous behavior which was working.

[7185]

Thank you for this patch.
viewBox is not mandatory on SVG files, it's perfectly fine to write <svg width="64" height="64" ...> for a 64 px (default unit) squared viewport even though it's not recommended. These values can be overwritten if using something like Icon file.svg:16x16. Scaling would be different without a viewBox but it should still render something valid.