- From: Tab Atkins Jr. <jackalmage@gmail.com>
- Date: Wed, 5 Nov 2014 15:29:06 -0800
- To: www-svg <www-svg@w3.org>
The current grammar for marker-pattern is: [ none | <length> | <percentage> | <marker-ref> ]+ What this is trying to express is "one or more groups of markers (or 'none' to indicate no marker at a given spot), each group separated by a length or percentage, and the whole list possibly preceded or followed by a length or percentage" What it actually expresses is that things like this are possible: 50px 5% url(#m1) none url(#m2) 1. Chaining multiple lengths/percentages together is unnecessary, as we have calc() when we want to add together dissimilar units. 2. Allowing multiple markers at a given spot is fine, but it should be a choice of saying "none" *or* 1+ markers; mixing them is silly. Here's a grammar that expresses what we want better: <marker-gap>? <marker-ref-group> [ <marker-gap> <marker-ref-group> ]* <marker-gap>? <marker-gap> = <length> | <percentage> <marker-ref-group> = none | <marker-ref>+ ~TJ
Received on Wednesday, 5 November 2014 23:29:53 UTC