- From: Jeremie Patonnier via GitHub <sysbot+gh@w3.org>
- Date: Wed, 11 Mar 2020 10:53:30 +0000
- To: public-svg-issues@w3.org
JeremiePat has just created a new issue for https://github.com/w3c/svgwg: == Relax SVG Path grammar with an optional first MoveTo command == Hello SVGWG According to the [the current SVG2 Path grammar](https://svgwg.org/svg2-draft/paths.html#PathDataBNF) the first command in a path **must be** a moveTo command. I would advocate for relaxing that constrain and consider that **all path should start with an implicit `M0,0` command**. That simple change would have two benefits: 1. This would make the parsing of SVG path way easier without introducing any breaking change (except the fact that authors providing current wrong path would get a path drawn instead of no rendering). 2. This would make some prose a lot less convoluted. For example, in the [definition of the MoveTo command](https://svgwg.org/svg2-draft/paths.html#PathDataMovetoCommands), it is stated that: > If a relative moveto (m) appears as the first element of the path, then it is treated as a pair of absolute coordinates. In this case, subsequent pairs of coordinates are treated as relative even though the initial moveto is interpreted as an absolute moveto. Which means that a path like `m1,1 2,2` must be interpreted as `M1,1 l2,2`. With an implicit `M0,0` command at the beginning, that whole text can be removed and the management of path data will be a lot easier for implementer. Please view or discuss this issue at https://github.com/w3c/svgwg/issues/780 using your GitHub account
Received on Wednesday, 11 March 2020 10:53:32 UTC