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extmarks/bufhl: reimplement using new marktree data structure

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Add new "splice" interface for tracking buffer changes at the byte
level. This will later be reused for byte-resolution buffer updates.
(Implementation has been started, but using undocumented "_on_bytes"
option now as interface hasn't been finalized).

Use this interface to improve many edge cases of extmark adjustment.
Changed tests indicate previously incorrect behavior. Adding tests for
more edge cases will be follow-up work (overlaps on_bytes tests)

Don't consider creation/deletion of marks an undoable event by itself.
This behavior was never documented, and imposes  complexity for little gain.

Add nvim__buf_add_decoration temporary API for direct access to the new
implementation. This should be refactored into a proper API for
decorations, probably involving a huge dict.

fixes #11598
This commit is contained in:
Björn Linse
2020-01-14 12:45:09 +01:00
parent 55677ddc46
commit ca1a00edd6
26 changed files with 1694 additions and 2420 deletions
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12
src/nvim/indent.c
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@@ -13,6 +13,7 @@
#include "nvim/charset.h"
#include "nvim/cursor.h"
#include "nvim/mark.h"
#include "nvim/mark_extended.h"
#include "nvim/memline.h"
#include "nvim/memory.h"
#include "nvim/misc1.h"
@@ -88,6 +89,7 @@ int get_indent_str(char_u *ptr, int ts, int list)
// SIN_CHANGED: call changed_bytes() if the line was changed.
// SIN_INSERT: insert the indent in front of the line.
// SIN_UNDO: save line for undo before changing it.
// SIN_NOMARK: don't move extmarks (because just after ml_append or something)
// @param size measured in spaces
// Returns true if the line was changed.
int set_indent(int size, int flags)
@@ -205,6 +207,7 @@ int set_indent(int size, int flags)
// If 'preserveindent' and 'expandtab' are both set keep the original
// characters and allocate accordingly. We will fill the rest with spaces
// after the if (!curbuf->b_p_et) below.
int skipcols = 0; // number of columns (in bytes) that were presved
if (orig_char_len != -1) {
int newline_size; // = orig_char_len + size - ind_done + line_len
STRICT_ADD(orig_char_len, size, &newline_size, int);
@@ -219,6 +222,7 @@ int set_indent(int size, int flags)
ind_len = orig_char_len + todo;
p = oldline;
s = newline;
skipcols = orig_char_len;
while (orig_char_len > 0) {
*s++ = *p++;
@@ -263,6 +267,7 @@ int set_indent(int size, int flags)
ind_done++;
}
*s++ = *p++;
skipcols++;
}
// Fill to next tabstop with a tab, if possible.
@@ -290,6 +295,13 @@ int set_indent(int size, int flags)
// Replace the line (unless undo fails).
if (!(flags & SIN_UNDO) || (u_savesub(curwin->w_cursor.lnum) == OK)) {
ml_replace(curwin->w_cursor.lnum, newline, false);
if (!(flags & SIN_NOMARK)) {
extmark_splice(curbuf,
(int)curwin->w_cursor.lnum-1, skipcols,
0, (int)(p-oldline) - skipcols,
0, (int)(s-newline) - skipcols,
kExtmarkUndo);
}
if (flags & SIN_CHANGED) {
changed_bytes(curwin->w_cursor.lnum, 0);