| Commit message (Collapse) | Author | Age |
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The screen grid refactors will continue until morale improves.
Jokes aside, this is quite a central installment in the series.
Before this refactor, there were two fundamentally distinct codepaths
for getting some text on the screen:
- the win_line() -> grid_put_linebuf() -> ui_line() call chain used for
buffer text, with linebuf_char as a temporary scratch buffer
- the grid_line_start/grid_line_puts/grid_line_flush() -> ui_line()
path used for every thing else: statuslines, messages and the command line.
Here the grid->chars[] array itself doubles as a scratch buffer.
With this refactor, the later family of functions still exist, however
they now as well render to linebuf_char just like win_line() did, and
grid_put_linebuf() is called in the end to calculate delta changes.
This means we don't need any duplicate logic for delta calculations anymore.
Later down the line, it will be possible to share more logic operating
on this scratch buffer, like doing 'rightleft' reversal and arabic
shaping as a post-processing step.
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Problem: multispace wrong when scrolling horizontally
Solution: Update position in "multispace" or "leadmultispace" also in
skipped chars. Reorder conditions to be more consistent.
closes: vim/vim#13145
closes: vim/vim#13147
https://github.com/vim/vim/commit/abc808112ee5df58a9f612f2bb5a65389c2c14e1
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Problem: curswant wrong on click with 've' and 'nowrap' set
Solution: Add w_leftcol to mouse click column.
closes: vim/vim#13142
https://github.com/vim/vim/commit/db54e989b5cff3cc6442dfc500e3962cc1c0b6d0
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Co-authored-by: zeertzjq <zeertzjq@outlook.com>
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This is not used as part of the logic to actually implement TUI line wrapping
In vim (especially gvim) it is used to emulate terminal-style text
selection. But in nvim we don't do that, and have no plans to reintroduce it.
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Previously, a screen cell would occupy 28+4=32 bytes per cell
as we always made space for up to MAX_MCO+1 codepoints in a cell.
As an example, even a pretty modest 50*80 screen would consume
50*80*2*32 = 256000, i e a quarter megabyte
With the factor of two due to the TUI side buffer, and even more when
using msg_grid and/or ext_multigrid.
This instead stores a 4-byte union of either:
- a valid UTF-8 sequence up to 4 bytes
- an escape char which is invalid UTF-8 (0xFF) plus a 24-bit index to a
glyph cache
This avoids allocating space for huge composed glyphs _upfront_, while
still keeping rendering such glyphs reasonably fast (1 hash table lookup
+ one plain index lookup). If the same large glyphs are using repeatedly
on the screen, this is still a net reduction of memory/cache
consumption. The only case which really gets worse is if you blast
the screen full with crazy emojis and zalgo text and even this case
only leads to 4 extra bytes per char.
When only <= 4-byte glyphs are used, plus the 4-byte attribute code,
i e 8 bytes in total there is a factor of four reduction of memory use.
Memory which will be quite hot in cache as the screen buffer is scanned
over in win_line() buffer text drawing
A slight complication is that the representation depends on host byte
order. I've tested this manually by compling and running this
in qemu-s390x and it works fine. We might add a qemu based solution
to CI at some point.
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Co-authored-by: Lewis Russell <lewis6991@gmail.com>
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Also make virt_text_hide work properly.
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fix(extmarks): draw virt_text properly below diff filler lines
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TODO: virt_text_hide doesn't work for the first char on a wrapped screen
line, and it's not clear how to fix that.
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The removes the previous restriction that nvim_buf_set_extmark()
could not be used to highlight arbitrary multi-line regions
The problem can be summarized as follows: let's assume an extmark with a
hl_group is placed covering the region (5,0) to (50,0) Now, consider
what happens if nvim needs to redraw a window covering the lines 20-30.
It needs to be able to ask the marktree what extmarks cover this region,
even if they don't begin or end here.
Therefore the marktree needs to be augmented with the information covers
a point, not just what marks begin or end there. To do this, we augment
each node with a field "intersect" which is a set the ids of the
marks which overlap this node, but only if it is not part of the set of
any parent. This ensures the number of nodes that need to be explicitly
marked grows only logarithmically with the total number of explicitly
nodes (and thus the number of of overlapping marks).
Thus we can quickly iterate all marks which overlaps any query position
by looking up what leaf node contains that position. Then we only need
to consider all "start" marks within that leaf node, and the "intersect"
set of that node and all its parents.
Now, and the major source of complexity is that the tree restructuring
operations (to ensure that each node has T-1 <= size <= 2*T-1) also need
to update these sets. If a full inner node is split in two, one of the
new parents might start to completely overlap some ranges and its ids
will need to be moved from its children's sets to its own set.
Similarly, if two undersized nodes gets joined into one, it might no
longer completely overlap some ranges, and now the children which do
needs to have the have the ids in its set instead. And then there are
the pivots! Yes the pivot operations when a child gets moved from one
parent to another.
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Problem: 'linebreak' is incorrectly drawn after 'breakindent'.
Solution: Don't include 'breakindent' size when already after it.
closes: vim/vim#12937
closes: vim/vim#12940
https://github.com/vim/vim/commit/1d3e0e8f3110a7807431eae056914ccea57b057b
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text
Problem: Cursor position still wrong with 'showbreak' and virtual text
after last character or 'listchars' "eol".
Solution: Remove unnecessary w_wcol adjustment in curs_columns(). Also
fix first char of virtual text not shown at the start of a screen
line.
closes: vim/vim#12478
closes: vim/vim#12532
closes: vim/vim#12904
https://github.com/vim/vim/commit/6a3897232aecd3e8b9e8b23955e55c1993e5baec
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ml_get_buf() takes a third parameters to indicate whether the
caller wants to mutate the memline data in place. However
the vast majority of the call sites is using this function
just to specify a buffer but without any mutation. This makes
it harder to grep for the places which actually perform mutation.
Solution: Remove the bool param from ml_get_buf(). it now works
like ml_get() except for a non-current buffer. Add a new
ml_get_buf_mut() function for the mutating use-case, which can
be grepped along with the other ml_replace() etc functions which
can modify the memline.
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Problem: Wrong display with wrapping virtual text or unprintable chars,
'showbreak' and 'smoothscroll'.
Solution: Don't skip cells taken by 'showbreak' in screen lines before
"w_skipcol". Combined "n_skip" and "skip_cells".
closes: vim/vim#12597
https://github.com/vim/vim/commit/b557f4898208105b674df605403cac1b1292707b
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screen line (#24806)
Problem: Visual highlight not working with cursor at end of screen line
and 'showbreak'.
Solution: Only update "vcol_prev" when drawing buffer text.
closes: vim/vim#12865
https://github.com/vim/vim/commit/8fc6a1dae07aa63faa6bfe6ed93888635745830c
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This treats extmark conceal more like matchadd() conceal.
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Problem: Wrong cursor position when clicking after concealed text
with 'virtualedit'.
Solution: Store virtual columns in ScreenCols[] instead of text
columns, and always use coladvance() when clicking.
This also fixes incorrect curswant when clicking on a TAB, so now
Test_normal_click_on_ctrl_char() asserts the same results as the ones
before patch 9.0.0048.
closes: vim/vim#12808
https://github.com/vim/vim/commit/e500ae8e29ad921378085f5d70ee5c0c537be1ba
Remove the mouse_adjust_click() function.
There is a difference in behavior with the old mouse_adjust_click()
approach: when clicking on the character immediately after concealed
text that is completely hidden, cursor is put on the clicked character
rather than at the start of the concealed text. The new behavior is
better, but it causes unnecessary scrolling in a functional test (which
is an existing issue unrelated to these patches), so adjust the test.
Now fully merged:
vim-patch:9.0.0177: cursor position wrong with 'virtualedit' and mouse click
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(#24779)
Problem: blockwise Visual highlight not working with virtual text
Solution: Reset the correct variable at the end of virtual selection and
Check for double-width char inside virtual text.
closes: vim/vim#12606
https://github.com/vim/vim/commit/6e940d9a1d4ff122aad1b0821c784a60b507d45c
Need to remove area_active and use wlv.fromcol and wlv.tocol directly.
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Extreme testcase:
```lua
vim.fn.setline(1, 'foobar')
local ns = vim.api.nvim_create_namespace('')
for _ = 1, 100000 do
vim.api.nvim_buf_set_extmark(0, ns, 0, 3, {})
end
local start_time = vim.loop.hrtime()
vim.fn.virtcol('$')
local stop_time = vim.loop.hrtime()
print(stop_time - start_time)
```
Before #20130: 31696
On master branch: 26191344
After this PR: 37692
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long is 32-bits even on 64-bit windows which makes the type suboptimal
for a codebase meant to be cross-platform.
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also fixes an edge case where the extends character would not be drawn if the real text exactly fits the grid.
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Problem: Visual area not shown when using 'showbreak' and start of line is
not visible. (Jaehwang Jung)
Solution: Adjust "fromcol" for the space taken by 'showbreak'.
(closes vim/vim#12514)
https://github.com/vim/vim/commit/f578ca2c8f36b61ac3301fe8b59a8473c964cdc2
Co-authored-by: Bram Moolenaar <Bram@vim.org>
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Problem: Using freed memory when 'foldcolumn' is set.
Solution: Save extra pointer to free it later. (closes vim/vim#12492)
https://github.com/vim/vim/commit/58e1e010454113a7c8a9b0327c54d2ee7d73d2fd
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Also always check for fi_level before fi_lines.
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vim-patch:9.0.{1585,1595}
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