Richard Fairhurst wrote:
Hello MapCSS list - it's been a while. :)
I'm doing some work on Halcyon/P2's MapCSS implementation.
Am I right in thinking that
http://wiki.openstreetmap.org/wiki/Talk:MapCSS/0.2#Dealing_with_z-index_and_cascades_more_sensibly
is the current agreed subpart spec?
Its a draft, so if you have suggestions / criticism, we should discuss it.
Let me suggest to change the symbol from double colon to something
unoccupied, e.g. a slash:
way[access=private]::access ---> way[access=private]/access
The CSS spec has ::first_letter and ::before as examples for so called
pseudo elements [1]. The first makes the rule apply only to the first
letter and the latter inserts text like paragraph numbering into the
document [2]
What we have in mapcss is actually more clear cut: Create an extra
world/layer/cascade for each subpart, the individual layers are
independent from each other. In the end, render all of them at once
(respecting z-index).
This has not much to do with what CSS defines as pseudo element.
Shall we copy the draft from the Talk page to MapCSS/0.2? Do you prefer
double colon or slash symbol?
[1] <http://www.w3.org/TR/2009/PR-css3-selectors-20091215/#pseudo-elements>
[2] <http://www.w3.org/TR/2009/CR-CSS2-20090908/generate.html>
Sebastian
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