Cleanup viewBox feature request

[josephfarina]

I would like to propose a feature called something like: simplifyViewbox that updates the viewBox attribute AND all the child elements. I am more than happy to submit a PR to this. I just wanted to see if there was any interest / get some insight into the value of this request.

The use case for this is if you have a really ugly SVG file like:

<!-- This is very unreadable -->
<svg viewBox="0 0 70591.91181 35296.6681">
  <rect x="11294.48" y=" 3529.525" width="42354.3" height="28237.334" />
</svg>

<!-- This is essentially the equivalent to the above one, but easily editable by hand -->
<svg viewBox="0 0 500 250"> 
  <rect x="80" y="25" width="300" height="200" />
</svg>

I think the API would allow the user to specify a height AND/OR width value.

• If both are specified then that would be destructive to the aspect ratio.
• If just a height is specified then the width will be calculated based on the already existing aspect ratio.
• If just a width is specified then it would be the opposite if just a height is specified.

Very interested in hearing any thoughts you have about this.

[GreLI]

It's a known optimization technique, but unfortunately it's hard to automate, especially in more complex cases. E.g. how to you find these numbers? You need to scale by a certain value, but how do you know this value and that it's good, other then trying many possibilities one by one which is ineffective and slow? See #293.