* Fix incorrect LastVisualX after changing bufWidth w/o resize
When we resize a buffer pane with softwrap enabled, we update the
cursors LastVisualX values to ensure that moving cursor up or down
within a wrapped line will move the cursor to the correct location.
The problem is that we need to do it also in cases when the visual
buffer width within the buffer window is changing without resizing
the window itself, e.g. when toggling the ruler on/off.
So update LastVisualX whenever the buffer width changes, not neccesarily
as a result of resizing the buffer window.
* Update LastVisualX and relocate when toggling wordwrap on/off
Visual location of a cursor may change not only when softwrap is toggled
on or off but also when wordwrap is toggled on or off without changing
the softwrap setting. So need to update cursor LastVisualX values and
relocate the view if needed, just like when softwrap is toggled, to make
sure that moving the cursor up and down will work correctly and that the
cursor will not be left out of the view.
* Add LessEqual and GreaterEqual for SLoc
* Fix relocate at the end of buffer when scrollmargin is 0
Fix the following issue: when scrollmargin is set to 0 and we move the
cursor to the end of buffer (e.g. via Ctrl-End), the buffer view doesn't
move.
The cause is that the condition c.LessThan(w.Scroll(bEnd, -scrollmargin+1))
doesn't hold, since Scroll() takes care not to return a location beyond
the end of buffer, so in this case Scroll() just returns bEnd.
* Support for highlighting all search matches (hlsearch)
hlsearch is implemented efficiently using the buffer's line array,
somewhat similarly to the syntax highlighting.
Unlike the syntax highlighter which highlights the entire file,
hlsearch searches for matches for the displayed lines only.
Matches are searched when the given line is displayed first time
or after it was modified. Otherwise the previously found matches
are used.
* Add UnhighlightSearch action
and add it to the list of actions triggered by Esc key by default.
* Add comment explaining the purpose of search map
* Add hlsearch colors to colorschemes
Mostly just copied from the corresponding original (mostly vim) colorschemes.
* Highlight matches during/after replace as well
As a side effect it also changes the last search value, i.e. affects FindNext
and FindPrevious, but it's probably fine. In vim it works the same way.
* Improve hlsearch option description
BufView returns not only the buffer's width and height but also its
x,y position. It may be useful e.g. for checking if a mouse click was
on the actual buffer or ourside it, e.g. on the gutter.
Don't highlight space characters at the right edge which are used just
for padding after line break in word wrapping, i.e. don't correspond to
any real characters in the buffer.
This makes it look nicer e.g. when selecting word-wrapped text.
Modified behavior of CursorUp, CursorDown, CursorPageUp etc:
if softwrap is enabled, cursor moves by visual lines, not logical lines.
TODO: implement it also for Home and End keys: move cursor to the
visual start or end of a line. I haven't implemented it for now, because
I'm not sure what should be the behavior of StartOfTextToggle then
(considering that Home key is bound to StartOfTextToggle by default).
Fixes#1598
Fix displaying tabs and wide runes which don't fit in the window.
Don't overwrite the vertical divider and the adjacent window.
- For tabs: display only as many of the tab's spaces as fit in the window.
- For wide runes: if a rune doesn't fit, don't display it in this line at all.
If softwrap is on, display this rune in the next line.
Fixes#1979
Fixes issue with the usage of a slightly incorrect buffer height value
(v.Height should be v.Height-1 if statusline is displayed).
Also, to avoid too many duplications, the code reorganized a little:
buffer display params (width, height, gutter offset and others) are
calculated in a single place.
Softwrap implementation enhanced to fix various issues with scrolling,
centering, relocating etc.
The main idea is simple: work not with simple line numbers but
with (Line, Row) pairs, where Line is a line number in the buffer
and Row is a visual line (a row) number within this line.
The logic remains mostly the same, but simple arithmetic operations
on line numbers are replaced with corresponding operations on
(Line, Row) pairs.
Fixes#632, #1657
* Added hybrid line numbers
* Changed rulerhybrid to relativeruler, modified documentation accordingly.
* Reverted go.mod and go.sum
I don't know how they got changed but they are good now.
Co-authored-by: Colin Hughes <semilin@pop-os.localdomain>
