This is more work to further isolate the layers that entities draw to.
It makes it easier to debug what is going on, and can eventually lead to
deferred drawing, if each draw function is in its own place and not dependant
on anything else.
I've started to replace the vertex-hover with an explicit layer for touch
targets.
Also had to change a lot of the svg tests, which are really brittle.
Things would happen like - the surface would be created, it would kick of a
deferred redraw, which would notice that the zoom was 0 and call
editOff, which would remove the osm layers that were just created and
that the tests were trying to draw to. These tests need proper zoom and
projection otherwise nothing works.
* Cache icon
* Append rather than insert
* Do fewer things on update
* Don't create a fill unless needed
* Don't apply tag and member classes (never used)
* Drop down to raw setAttribute (d3 is slow :trollface:)
At z16 and below, tagged points are rendered with a small
dot in the center. At z17 and above, they are rendered with
a maki icon.
See the test rendering page for examples.
Fixes#381.
Now that Graph#parentWays is cached, the specialized Graph#parentStructure
method is no longer necessary.
This commit also demonstrates that it's relatively easy to write specs for
rendering now!
