fix(float): do not switch window before deleting last listed buffer (#17840)

Just allow close_windows() to close the current window instead.
This fixes wrong working directory or autocommands not being triggered.

2 files changed, 74 insertions, 53 deletions

diff --git a/src/nvim/buffer.c b/src/nvim/buffer.c
index 7fc880fb41..f200f16a5f 100644
--- a/src/nvim/buffer.c
+++ b/src/nvim/buffer.c
@@ -1042,24 +1042,24 @@ static int empty_curbuf(int close_others, int forceit, int action)
   set_bufref(&bufref, buf);
 
   if (close_others) {
+    bool can_close_all_others = true;
     if (curwin->w_floating) {
-      bool can_close_all_others = false;
+      // Closing all other windows with this buffer may leave only floating windows.
+      can_close_all_others = false;
       for (win_T *wp = firstwin; !wp->w_floating; wp = wp->w_next) {
         if (wp->w_buffer != curbuf) {
           // Found another non-floating window with a different (probably unlisted) buffer.
-          // Closing all other windows with the this buffer is fine in this case.
+          // Closing all other windows with this buffer is fine in this case.
           can_close_all_others = true;
           break;
         }
       }
-      if (!can_close_all_others) {
-        // Closing all other windows with this buffer will close all non-floating windows.
-        // Move to a non-floating window then.
-        curwin = firstwin;
-      }
     }
-    // Close any other windows on this buffer, then make it empty.
-    close_windows(buf, true);
+    // If it is fine to close all other windows with this buffer, keep the current window and
+    // close any other windows with this buffer, then make it empty.
+    // Otherwise close_windows() will refuse to close the last non-floating window, so allow it
+    // to close the current window instead.
+    close_windows(buf, can_close_all_others);
   }
 
   setpcmark();
diff --git a/test/functional/ui/float_spec.lua b/test/functional/ui/float_spec.lua
index 886bfa2147..359d1f206a 100644
--- a/test/functional/ui/float_spec.lua
+++ b/test/functional/ui/float_spec.lua
@@ -17,6 +17,7 @@ local funcs = helpers.funcs
 local run = helpers.run
 local pcall_err = helpers.pcall_err
 local tbl_contains = global_helpers.tbl_contains
+local curbuf, curwin, curtab = helpers.curbuf, helpers.curwin, helpers.curtab
 
 describe('float window', function()
   before_each(function()
@@ -423,8 +424,8 @@ describe('float window', function()
     local old_buf, old_win
     before_each(function()
       insert('foo')
-      old_buf = meths.get_current_buf()
-      old_win = meths.get_current_win()
+      old_buf = curbuf().id
+      old_win = curwin().id
     end)
     describe('closing the last non-floating window gives E444', function()
       before_each(function()
@@ -442,44 +443,53 @@ describe('float window', function()
     end)
     describe("deleting the last non-floating window's buffer", function()
       describe('leaves one window with an empty buffer when there is only one buffer', function()
+        local same_buf_float
         before_each(function()
-          meths.open_win(old_buf, true, float_opts)
+          same_buf_float = meths.open_win(old_buf, false, float_opts).id
         end)
         after_each(function()
-          eq(old_win, meths.get_current_win())
+          eq(old_win, curwin().id)
           expect('')
           eq(1, #meths.list_wins())
         end)
         it('if called from non-floating window', function()
-          meths.set_current_win(old_win)
           meths.buf_delete(old_buf, {force = true})
         end)
         it('if called from floating window', function()
+          meths.set_current_win(same_buf_float)
+          command('autocmd WinLeave * let g:win_leave = nvim_get_current_win()')
+          command('autocmd WinEnter * let g:win_enter = nvim_get_current_win()')
           meths.buf_delete(old_buf, {force = true})
+          eq(same_buf_float, eval('g:win_leave'))
+          eq(old_win, eval('g:win_enter'))
         end)
       end)
       describe('closes other windows with that buffer when there are other buffers', function()
         local same_buf_float, other_buf, other_buf_float
         before_each(function()
-          same_buf_float = meths.open_win(old_buf, false, float_opts)
-          other_buf = meths.create_buf(true, false)
-          other_buf_float = meths.open_win(other_buf, true, float_opts)
+          same_buf_float = meths.open_win(old_buf, false, float_opts).id
+          other_buf = meths.create_buf(true, false).id
+          other_buf_float = meths.open_win(other_buf, true, float_opts).id
           insert('bar')
           meths.set_current_win(old_win)
         end)
         after_each(function()
-          eq(other_buf, meths.get_current_buf())
+          eq(other_buf, curbuf().id)
           expect('bar')
           eq(2, #meths.list_wins())
         end)
         it('if called from non-floating window', function()
           meths.buf_delete(old_buf, {force = true})
-          eq(old_win, meths.get_current_win())
+          eq(old_win, curwin().id)
         end)
         it('if called from floating window with the same buffer', function()
           meths.set_current_win(same_buf_float)
+          command('autocmd WinLeave * let g:win_leave = nvim_get_current_win()')
+          command('autocmd WinEnter * let g:win_enter = nvim_get_current_win()')
           meths.buf_delete(old_buf, {force = true})
-          eq(old_win, meths.get_current_win())
+          eq(same_buf_float, eval('g:win_leave'))
+          eq(old_win, eval('g:win_enter'))
+          eq(old_win, curwin().id)
         end)
         -- TODO: this case is too hard to deal with
         pending('if called from floating window with another buffer', function()
@@ -490,9 +500,9 @@ describe('float window', function()
       describe('creates an empty buffer when there is only one listed buffer', function()
         local same_buf_float, unlisted_buf_float
         before_each(function()
-          same_buf_float = meths.open_win(old_buf, false, float_opts)
-          local unlisted_buf = meths.create_buf(true, false)
-          unlisted_buf_float = meths.open_win(unlisted_buf, true, float_opts)
+          same_buf_float = meths.open_win(old_buf, false, float_opts).id
+          local unlisted_buf = meths.create_buf(true, false).id
+          unlisted_buf_float = meths.open_win(unlisted_buf, true, float_opts).id
           insert('unlisted')
           command('set nobuflisted')
           meths.set_current_win(old_win)
@@ -503,12 +513,16 @@ describe('float window', function()
         end)
         it('if called from non-floating window', function()
           meths.buf_delete(old_buf, {force = true})
-          eq(old_win, meths.get_current_win())
+          eq(old_win, curwin().id)
         end)
         it('if called from floating window with the same buffer', function()
           meths.set_current_win(same_buf_float)
+          command('autocmd WinLeave * let g:win_leave = nvim_get_current_win()')
+          command('autocmd WinEnter * let g:win_enter = nvim_get_current_win()')
           meths.buf_delete(old_buf, {force = true})
-          eq(old_win, meths.get_current_win())
+          eq(same_buf_float, eval('g:win_leave'))
+          eq(old_win, eval('g:win_enter'))
+          eq(old_win, curwin().id)
         end)
         -- TODO: this case is too hard to deal with
         pending('if called from floating window with an unlisted buffer', function()
@@ -525,7 +539,7 @@ describe('float window', function()
           insert('unlisted')
           command('set nobuflisted')
           meths.set_current_win(old_win)
-          same_buf_float = meths.open_win(old_buf, false, float_opts)
+          same_buf_float = meths.open_win(old_buf, false, float_opts).id
         end)
         after_each(function()
           expect('')
@@ -533,12 +547,12 @@ describe('float window', function()
         end)
         it('if called from non-floating window with the deleted buffer', function()
           meths.buf_delete(old_buf, {force = true})
-          eq(old_win, meths.get_current_win())
+          eq(old_win, curwin().id)
         end)
         it('if called from floating window with the deleted buffer', function()
           meths.set_current_win(same_buf_float)
           meths.buf_delete(old_buf, {force = true})
-          eq(same_buf_float, meths.get_current_win())
+          eq(same_buf_float, curwin().id)
         end)
       end)
     end)
@@ -550,17 +564,17 @@ describe('float window', function()
     before_each(function()
       insert('unlisted')
       command('set nobuflisted')
-      unlisted_buf = meths.get_current_buf()
+      unlisted_buf = curbuf().id
       command('tabnew')
       insert('foo')
-      old_buf = meths.get_current_buf()
-      old_win = meths.get_current_win()
+      old_buf = curbuf().id
+      old_win = curwin().id
     end)
     describe('without splits, deleting the last listed buffer creates an empty buffer', function()
       local same_buf_float
       before_each(function()
         meths.set_current_win(old_win)
-        same_buf_float = meths.open_win(old_buf, false, float_opts)
+        same_buf_float = meths.open_win(old_buf, false, float_opts).id
       end)
       after_each(function()
         expect('')
@@ -569,12 +583,16 @@ describe('float window', function()
       end)
       it('if called from non-floating window', function()
         meths.buf_delete(old_buf, {force = true})
-        eq(old_win, meths.get_current_win())
+        eq(old_win, curwin().id)
       end)
       it('if called from floating window with the same buffer', function()
         meths.set_current_win(same_buf_float)
+        command('autocmd WinLeave * let g:win_leave = nvim_get_current_win()')
+        command('autocmd WinEnter * let g:win_enter = nvim_get_current_win()')
         meths.buf_delete(old_buf, {force = true})
-        eq(old_win, meths.get_current_win())
+        eq(same_buf_float, eval('g:win_leave'))
+        eq(old_win, eval('g:win_enter'))
+        eq(old_win, curwin().id)
       end)
     end)
     describe('with splits, deleting the last listed buffer creates an empty buffer', function()
@@ -583,7 +601,7 @@ describe('float window', function()
         command('botright vsplit')
         meths.set_current_buf(unlisted_buf)
         meths.set_current_win(old_win)
-        same_buf_float = meths.open_win(old_buf, false, float_opts)
+        same_buf_float = meths.open_win(old_buf, false, float_opts).id
       end)
       after_each(function()
         expect('')
@@ -592,12 +610,12 @@ describe('float window', function()
       end)
       it('if called from non-floating window with the deleted buffer', function()
         meths.buf_delete(old_buf, {force = true})
-        eq(old_win, meths.get_current_win())
+        eq(old_win, curwin().id)
       end)
       it('if called from floating window with the deleted buffer', function()
         meths.set_current_win(same_buf_float)
         meths.buf_delete(old_buf, {force = true})
-        eq(same_buf_float, meths.get_current_win())
+        eq(same_buf_float, curwin().id)
       end)
     end)
   end)
@@ -606,43 +624,46 @@ describe('float window', function()
     local float_opts = {relative = 'editor', row = 1, col = 1, width = 1, height = 1}
     local old_tabpage, old_buf, old_win
     before_each(function()
-      old_tabpage = meths.get_current_tabpage()
+      old_tabpage = curtab().id
       insert('oldtab')
       command('tabnew')
-      old_buf = meths.get_current_buf()
-      old_win = meths.get_current_win()
+      old_buf = curbuf().id
+      old_win = curwin().id
     end)
     describe('closing the last non-floating window', function()
       describe('closes the tabpage when all floating windows are closeable', function()
+        local same_buf_float
         before_each(function()
-          meths.open_win(old_buf, true, float_opts)
+          same_buf_float = meths.open_win(old_buf, false, float_opts).id
         end)
         after_each(function()
-          eq(old_tabpage, meths.get_current_tabpage())
+          eq(old_tabpage, curtab().id)
           expect('oldtab')
           eq(1, #meths.list_tabpages())
         end)
         it('if called from non-floating window', function()
-          meths.set_current_win(old_win)
           meths.win_close(old_win, false)
         end)
         it('if called from floating window', function()
+          meths.set_current_win(same_buf_float)
           meths.win_close(old_win, false)
         end)
       end)
       describe('gives E5601 when there are non-closeable floating windows', function()
+        local other_buf_float
         before_each(function()
           command('set nohidden')
-          local other_buf = meths.create_buf(true, false)
-          meths.open_win(other_buf, true, float_opts)
+          local other_buf = meths.create_buf(true, false).id
+          other_buf_float = meths.open_win(other_buf, true, float_opts).id
           insert('foo')
+          meths.set_current_win(old_win)
         end)
         it('if called from non-floating window', function()
-          meths.set_current_win(old_win)
           eq('Vim:E5601: Cannot close window, only floating window would remain',
              pcall_err(meths.win_close, old_win, false))
         end)
         it('if called from floating window', function()
+          meths.set_current_win(other_buf_float)
           eq('Vim:E5601: Cannot close window, only floating window would remain',
              pcall_err(meths.win_close, old_win, false))
         end)
@@ -650,15 +671,15 @@ describe('float window', function()
     end)
     describe("deleting the last non-floating window's buffer", function()
       describe('closes the tabpage when all floating windows are closeable', function()
-        local same_buf_win, other_buf, other_buf_win
+        local same_buf_float, other_buf, other_buf_float
         before_each(function()
-          same_buf_win = meths.open_win(old_buf, false, float_opts)
-          other_buf = meths.create_buf(true, false)
-          other_buf_win = meths.open_win(other_buf, true, float_opts)
+          same_buf_float = meths.open_win(old_buf, false, float_opts).id
+          other_buf = meths.create_buf(true, false).id
+          other_buf_float = meths.open_win(other_buf, true, float_opts).id
           meths.set_current_win(old_win)
         end)
         after_each(function()
-          eq(old_tabpage, meths.get_current_tabpage())
+          eq(old_tabpage, curtab().id)
           expect('oldtab')
           eq(1, #meths.list_tabpages())
         end)
@@ -666,12 +687,12 @@ describe('float window', function()
           meths.buf_delete(old_buf, {force = false})
         end)
         it('if called from floating window with the same buffer', function()
-          meths.set_current_win(same_buf_win)
+          meths.set_current_win(same_buf_float)
           meths.buf_delete(old_buf, {force = false})
         end)
         -- TODO: this case is too hard to deal with
         pending('if called from floating window with another buffer', function()
-          meths.set_current_win(other_buf_win)
+          meths.set_current_win(other_buf_float)
           meths.buf_delete(old_buf, {force = false})
         end)
       end)