Automatically determine output width

[Zannick]

My flowchart is very wide, but when mmdc outputs to png, it expects me to supply my own value for width. If I don't, it defaults to something so small that the result is illegible (--help says width default is 800; the file actually produced is 784x52). However, when I output to svg, the svg document includes a calculated max-width of 19769.9px, so I know it's possible to calculate.

Proposed solution
Either mmdc on its own should default to max-width, or there should be a flag to force it, such as: mmdc -w auto or mmdc -w max or mmdc --maxwidth.

Alternatives tried
My workaround is to output to svg, take the max-width from that, and output again as png with -w <max-width>.
I've not found any other easy way to create the max-width png on the live editor.