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api/buffer: create new buffers in the "opened" state

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Otherwise vim will think that ml_append() needs to "enter" the buffer,
which emits unexpected autocommands.

ref https://github.com/vim-airline/vim-airline/issues/1930
This commit is contained in:
Björn Linse
2019-06-03 13:08:05 +02:00
parent 3273e39db6
commit 7ac3c311ee
2 changed files with 33 additions and 7 deletions
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24
src/nvim/api/vim.c
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@@ -27,6 +27,7 @@
#include "nvim/types.h"
#include "nvim/ex_docmd.h"
#include "nvim/screen.h"
#include "nvim/memline.h"
#include "nvim/memory.h"
#include "nvim/message.h"
#include "nvim/edit.h"
@@ -977,11 +978,20 @@ Buffer nvim_create_buf(Boolean listed, Boolean scratch, Error *err)
BLN_NOOPT | BLN_NEW | (listed ? BLN_LISTED : 0));
try_end(err);
if (buf == NULL) {
if (!ERROR_SET(err)) {
api_set_error(err, kErrorTypeException, "Failed to create buffer");
}
return 0;
goto fail;
}
// Open the memline for the buffer. This will avoid spurious autocmds when
// a later nvim_buf_set_lines call would have needed to "open" the buffer.
try_start();
block_autocmds();
int status = ml_open(buf);
unblock_autocmds();
try_end(err);
if (status == FAIL) {
goto fail;
}
if (scratch) {
aco_save_T aco;
aucmd_prepbuf(&aco, buf);
@@ -991,6 +1001,12 @@ Buffer nvim_create_buf(Boolean listed, Boolean scratch, Error *err)
aucmd_restbuf(&aco);
}
return buf->b_fnum;
fail:
if (!ERROR_SET(err)) {
api_set_error(err, kErrorTypeException, "Failed to create buffer");
}
return 0;
}
/// Open a new window.