The Segment class has been given two new properties: priority and
filler. The render method has been given a width argument.
If the width argument is specified when rendering a segment and the
rendered segments are too wide, segments are dropped in order of
priority, with the lowest priority (highest number) being dropped first
and any segment with priority < 0 is kept, regardless of the specified
width.
If the width argument is specified along with one or more filler
segments, the filler segments will pad the remaining space with space
characters until the desired width has been reached.
The handling of segment attributes has also been improved by lazily
looking up the correct attributes in the segment tree when it's being
rendered.
Finally, the rendering code itself has been improved a bit with less
code duplication and much more readable code.
This commit also includes a basic proof-of-concept demo for creating vim
statuslines. When creating vim statuslines you basically need to first
create the statusline the same way as the terminal demo, use the vim
renderer and then afterwards loop through the collected highlight groups
in the vim renderer and write those as vim highlight statements.
Vim obviously needs a ton of wrapper code to make everything work
properly (separate modes, callbacks, all that stuff) so the current demo
only shows some basic statusline highlighting.
This change joins the fg/bg/attr methods into a single hl method in the
renderers. This provides the same functionality, and it simplifies the
terminal rendering by being able to join all the attributes into one
escape sequence.
It's also a necessary change for the vim renderer, as this renderer
needs to log all the highlighting and create separate highlighting
classes for every single color and attribute combination. The only way
to do this is to have a single highlighting method.
This is currently rendered with the terminal renderer, and is just
a simple proof-of-concept of how vim statuslines can be defined with the
Python API.
Kim Silkebækken