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refactor(signcol): smarter invalidation (#17533)

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Previously b_signcols was invalidated whenever a sign was added/removed
or when a buffer line was added/removed.

This change introduces a sentinel linenr_T into the buffer state which
is a line number used to determine the signcolumn. With this
information, we can invalidate the signcolumn less often. Now the
signcolumn is only invalidated when a sign or line at the sentinel line
number is removed.
This commit is contained in:
Lewis Russell
2022-03-06 21:45:26 +00:00
committed by GitHub
parent 5400017020
commit 8e7446b3cb
5 changed files with 107 additions and 23 deletions
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9
src/nvim/decoration.c
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@@ -1,6 +1,7 @@
// This is an open source non-commercial project. Dear PVS-Studio, please check
// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
#include "nvim/buffer.h"
#include "nvim/decoration.h"
#include "nvim/extmark.h"
#include "nvim/highlight.h"
@@ -67,11 +68,6 @@ void bufhl_add_hl_pos_offset(buf_T *buf, int src_id, int hl_id, lpos_T pos_start
void decor_redraw(buf_T *buf, int row1, int row2, Decoration *decor)
{
if (row2 >= row1) {
if (decor && decor->sign_text) {
buf->b_signcols_valid = false;
changed_line_abv_curs();
}
if (!decor || decor->hl_id || decor_has_sign(decor)) {
redraw_buf_range_later(buf, row1+1, row2+1);
}
@@ -99,6 +95,9 @@ void decor_remove(buf_T *buf, int row, int row2, Decoration *decor)
assert(buf->b_signs > 0);
buf->b_signs--;
}
if (row2 >= row && decor->sign_text) {
buf_signcols_del_check(buf, row+1, row2+1);
}
}
decor_free(decor);
}