Problem: The fold and sign column is built and stored regardless of
whether the corresponding item is present in 'statuscolumn'.
Solution: Since the 'statuscolumn' parses itself, we can defer
building the columns until the corresponding item is
actually encountered.
Problem: The 'statuscolumn' width is being estimated without the
proper context. In particular, this resulted in the fact
that a custom fold column could be included in the estimated
`number_width()`, and doubly added when actually drawing the
statuscolumn due to `win_col_off()` also adding the
`'foldcolumn'` width. Resulting in a status column that is
`'foldcolumn'` cells wider than necessary.
Solution: Estimate 'statuscolumn' width in `get_statuscol_str()` when
a buffer's line count has changed.
Problem: 'statuscolumn' click definitions are cleared, evaluated,
allocated and filled each redraw for every row in a window.
This despite the fact that we only store a single click
definition array for the entire column as opposed to one
for each row.
Solution: Only fill the 'statuscolumn' click definition array once per
window per redraw.
Resolve https://github.com/neovim/neovim/issues/21767.
Click definitions are always filled for tabline, statusline and winbar,
so they should also be always filled for statuscolumn, otherwise it will
leak memory.
Note: this doesn't actually change the existing code much, because of a
typo in the existing code.
Problem: The default fold column, as well as the 'statuscolumn', were
drawn unnecessarily/unexpectedly for virtual lines placed
with `virt_lines_leftcol` set.
Solution: Skip the column states if a virtual line with
`virt_lines_leftcol` set will be drawn.
Problem: The `'statuscolumn'` was not re-evaluated for wrapped lines,
when preceded by virtual/filler lines. There was also no way
to distinguish virtual and wrapped lines in the status column.
Solution: Make sure to rebuild the statuscolumn, and replace variable
`v:wrap` with `v:virtnum`. `v:virtnum` is negative when drawing
virtual lines, zero when drawing the actual buffer line, and
positive when drawing the wrapped part of a buffer line.
fix(statuscolumn): statusline click registered as statuscolumn
Problem: Status line click is registered as status status column click.
Solution: Check that mouse is not on the status line.
Resolve https://github.com/luukvbaal/statuscol.nvim/issues/4.
test(statuscolumn): add more tests more wrapped lines
Also initialize a "relnum" variable to suppress a Coverity warning.
The uninitialized value wasn't actually used by build_statuscol_str().
Problem: Unable to customize the column next to a window ('gutter').
Solution: Add 'statuscolumn' option that follows the 'statusline' syntax,
allowing to customize the status column. Also supporting the %@
click execute function label. Adds new items @C and @s which
will print the fold and sign columns. Line numbers and signs
can be clicked, highlighted, aligned, transformed, margined etc.
