Hi Sebastian.
I'm not sure if there is something in current MapCSS ideas against the
functionality "inherited" from classical CSS.
In CSS I would suggest a cascading scheme for the labelling fallbacks
(the @ indicates an attribute - ignore it, if that's not MapCSS syntax),
but I hope, you get what I mean:
building[@addr:housenumber] {
text: @addr:housenumber;
}
building[@addr:housename] {
text: @addr:housename;
}
building[@name] {
text: @name;
}
building[@name:de] {
text: @name:de;
}
The value of text is calculated cascadingly: apply all definitions
consecutively, overwriting properties, if applied again.
If there is a Tag name:de at a building, it would be applied in my
example, as it's the last statement applied.
regards
Peter
Am 14.03.2011 15:03, schrieb Sebastian Klein:
Hi,
this is about the 'text' property and possibilities to determine the
text label string.
At the moment, the only option is to specify a certain key and the
renderer will look up the corresponding tag value and display it (if
found). This is somewhat limited, it would be nice to show a localized
name if present and fall back to the generic or English name
otherwise. Or display the name of a building, and if no name is given,
show the house number. This would be written like 'text-source: auto;'
or 'text-method: building;'. On top of that, is should be possible to
provide a static string as label or use an eval expression to
determine the text value.
Compared to a simple property such as 'width: 5;', the 'text' property
works in a more complicated manner as it explicitly refers to the
object tags. So it might be appropriate to change the name to
something more complicated, like 'text-from-tag'. It is less
memorable, but more clear in meaning.
Any suggestions how all this could be represented?
Sebastian
(related ticket: http://josm.openstreetmap.de/ticket/6107)
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