In combination with a (not yet implemented) `Symbolizer#isLiteral` method, calling `Symbolizer#evaluate` without a feature is the fast track for rendering batches of like-styled features. This change also simplifies the handling of undefined symbolizer literal properties (where stroke or fill properties are optional).
This adds ol.parser.ogc.KML which can be used to read and write KML documents.
NetworkLinks are retrieved asynchronously.
Current caveats of the implementation are:
* LabelStyle not yet implemented. Missing support in renderers.
* When using shared structures the parser needs to be configured with
dimension 2.
* We need a better way to disable fill, currently we use opacity as a
workaround.
* We cannot really roundtrip documents, since some of the info is not
preserved in the ol structures. But we can write out most of the important
info.
This adds the infrastructure that we need for documenting
exported object literals. This is best done by using *.jsdoc
files, which are parsed by JSDoc but not the Closure Compiler.
In addition to adding the documentation of the objects literal
properties, the respective namespaces must also be annotated.
Restricting the API docs to the exported API will be added as a
separate pull request.
The color names are more intuitive. And if we want to support pattern strokes or fills, we'll need additional proerties to represent other pattern properties.
Now vector layers can have a style. ol.Style instances have an
apply method to get the symbolizer literals for a feature. If the
layer does not have a style defined, there is also a static
applyDefaultStyle function on ol.Style to get the default
symbolizer literals for a feature. The vector layer also got a
groupFeaturesBySymbolizerLiteral method, which returns an array
with features grouped by symbolizer, as needed by the canvas
renderer.
Currently only renders points as circles. Eventually will have methods for other geometry types and other symbolizer types. Also provides static methods to render point symbolizers (returning a canvas that can be drawn on another).
