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window.c: do BufEnter in correct window after closing help #7431

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closes #7429

Problem: after a help window was closed, a window was selected and its
autocommands triggered. After that, restore_snapshot was called and the
focused window changed, confusing the user.

Solution: Add function get_snapshot_focus() that returns the window that
holds the cursor in a snapshot. Use this function in win_close to make
sure the right window is selected before any autocommand is triggered.
This commit is contained in:
glacambre 2017-11-26 13:29:32 +01:00 committed by Justin M. Keyes
parent 4a5bc6275d
commit abe38f7d26
2 changed files with 42 additions and 0 deletions
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29
src/nvim/window.c
View File

@ -1991,6 +1991,14 @@ int win_close(win_T *win, int free_buf)
* the screen space. */
wp = win_free_mem(win, &dir, NULL);
if (help_window) {
// Closing the help window moves the cursor back to the original window.
win_T *tmpwp = get_snapshot_focus(SNAP_HELP_IDX);
if (tmpwp != NULL) {
wp = tmpwp;
}
}
/* Make sure curwin isn't invalid. It can cause severe trouble when
* printing an error message. For win_equal() curbuf needs to be valid
* too. */
@ -5421,6 +5429,27 @@ static win_T *restore_snapshot_rec(frame_T *sn, frame_T *fr)
return wp;
}
/// Gets the focused window (the one holding the cursor) of the snapshot.
static win_T *get_snapshot_focus(int idx)
{
if (curtab->tp_snapshot[idx] == NULL) {
return NULL;
}
frame_T *sn = curtab->tp_snapshot[idx];
// This should be equivalent to the recursive algorithm found in
// restore_snapshot as far as traveling nodes go.
while (sn->fr_child != NULL || sn->fr_next != NULL) {
while (sn->fr_child != NULL) {
sn = sn->fr_child;
}
if (sn->fr_next != NULL) {
sn = sn->fr_next;
}
}
return sn->fr_win;
}
/*
* Set "win" to be the curwin and "tp" to be the current tab page.

13
test/functional/autocmd/bufenter_spec.lua
View File

@ -31,4 +31,17 @@ describe('autocmd BufEnter', function()
eq(1, eval("exists('g:dir_bufenter')")) -- Did BufEnter for the directory.
eq(2, eval("bufnr('%')")) -- Switched to the dir buffer.
end)
it('triggered by ":split normal|:help|:bw"', function()
command("split normal")
command("wincmd j")
command("helptags runtime/doc")
command("help")
command("wincmd L")
command("autocmd BufEnter normal let g:bufentered = 1")
command("bw")
eq(1, eval('bufnr("%")')) -- The cursor is back to the bottom window
eq(0, eval("exists('g:bufentered')")) -- The autocmd hasn't been triggered
end)
end)