Merge #10840 from janlazo/vim-8.1.1757

vim-patch:8.1.{1757,1924}

runtime/doc/eval.txt

@@ -2023,8 +2023,8 @@ bufexists({expr})		Number	|TRUE| if buffer {expr} exists
 buflisted({expr})		Number	|TRUE| if buffer {expr} is listed
 bufload({expr})			Number	load buffer {expr} if not loaded yet
 bufloaded({expr})		Number	|TRUE| if buffer {expr} is loaded
-bufname({expr})		String	Name of the buffer {expr}
-bufnr({expr} [, {create}])	Number	Number of the buffer {expr}
+bufname([{expr}])		String	Name of the buffer {expr}
+bufnr([{expr} [, {create}]])	Number	Number of the buffer {expr}
 bufwinid({expr})		Number	|window-ID| of buffer {expr}
 bufwinnr({expr})		Number	window number of buffer {expr}
 byte2line({byte})		Number	line number at byte count {byte}
@@ -2759,9 +2759,10 @@ bufloaded({expr})					*bufloaded()*
 		{expr} exists and is loaded (shown in a window or hidden).
 		The {expr} argument is used like with |bufexists()|.
 
-bufname({expr})						*bufname()*
+bufname([{expr}])						*bufname()*
 		The result is the name of a buffer, as it is displayed by the
 		":ls" command.
++		If {expr} is omitted the current buffer is used.
 		If {expr} is a Number, that buffer number's name is given.
 		Number zero is the alternate buffer for the current window.
 		If {expr} is a String, it is used as a |file-pattern| to match
@@ -2788,7 +2789,7 @@ bufname({expr})						*bufname()*
 	bufname("file2")	name of buffer where "file2" matches.
 
 							*bufnr()*
-bufnr({expr} [, {create}])
+bufnr([{expr} [, {create}]])
 		The result is the number of a buffer, as it is displayed by
 		the ":ls" command.  For the use of {expr}, see |bufname()|
 		above.

src/nvim/eval.c

@@ -7353,14 +7353,19 @@ static buf_T * get_buf_arg(typval_T *arg)
  */
 static void f_bufname(typval_T *argvars, typval_T *rettv, FunPtr fptr)
 {
+  const buf_T *buf;
   rettv->v_type = VAR_STRING;
   rettv->vval.v_string = NULL;
+  if (argvars[0].v_type == VAR_UNKNOWN) {
+    buf = curbuf;
+  } else {
     if (!tv_check_str_or_nr(&argvars[0])) {
       return;
     }
     emsg_off++;
-  const buf_T *const buf = tv_get_buf(&argvars[0], false);
+    buf = tv_get_buf(&argvars[0], false);
     emsg_off--;
+  }
   if (buf != NULL && buf->b_fname != NULL) {
     rettv->vval.v_string = (char_u *)xstrdup((char *)buf->b_fname);
   }
@@ -7371,15 +7376,21 @@ static void f_bufname(typval_T *argvars, typval_T *rettv, FunPtr fptr)
  */
 static void f_bufnr(typval_T *argvars, typval_T *rettv, FunPtr fptr)
 {
+  const buf_T *buf;
   bool error = false;
 
   rettv->vval.v_number = -1;
+
+  if (argvars[0].v_type == VAR_UNKNOWN) {
+    buf = curbuf;
+  } else {
     if (!tv_check_str_or_nr(&argvars[0])) {
       return;
     }
     emsg_off++;
-  const buf_T *buf = tv_get_buf(&argvars[0], false);
+    buf = tv_get_buf(&argvars[0], false);
     emsg_off--;
+  }
 
   // If the buffer isn't found and the second argument is not zero create a
   // new buffer.
@@ -15194,6 +15205,7 @@ static void set_buffer_lines(buf_T *buf, linenr_T lnum_arg, bool append,
       }
     }
     check_cursor_col();
+    update_topline();
   }
 
   if (!is_curbuf) {

src/nvim/eval.lua

@@ -44,13 +44,13 @@ return {
     bufadd={args=1},
     bufexists={args=1},
     buffer_exists={args=1, func='f_bufexists'},  -- obsolete
-    buffer_name={args=1, func='f_bufname'},  -- obsolete
-    buffer_number={args=1, func='f_bufnr'},  -- obsolete
+    buffer_name={args={0, 1}, func='f_bufname'},  -- obsolete
+    buffer_number={args={0, 1}, func='f_bufnr'},  -- obsolete
     buflisted={args=1},
     bufload={args=1},
     bufloaded={args=1},
-    bufname={args=1},
-    bufnr={args={1, 2}},
+    bufname={args={0, 1}},
+    bufnr={args={0, 2}},
     bufwinid={args=1},
     bufwinnr={args=1},
     byte2line={args=1},

src/nvim/testdir/test_arglist.vim

@@ -379,10 +379,10 @@ func Test_argedit()
   " make sure to use a new buffer number for x when it is loaded
   bw! x
   new
-  let a = bufnr('')
+  let a = bufnr()
   argedit x
-  call assert_equal(a, bufnr(''))
-  call assert_equal('x', bufname(''))
+  call assert_equal(a, bufnr())
+  call assert_equal('x', bufname())
   %argd
   bw! x
 endfunc

src/nvim/testdir/test_bufline.vim

@@ -1,6 +1,7 @@
 " Tests for setbufline(), getbufline(), appendbufline(), deletebufline()
 
 source shared.vim
+" source screendump.vim
 
 func Test_setbufline_getbufline()
   new
@@ -112,3 +113,28 @@ func Test_deletebufline()
   call assert_equal(['b', 'c'], getbufline(b, 1, 2))
   exe "bwipe! " . b
 endfunc
+
+func Test_appendbufline_redraw()
+  if !CanRunVimInTerminal()
+    throw 'Skipped: cannot make screendumps'
+  endif
+  let lines =<< trim END
+    new foo
+    let winnr=bufwinnr('foo')
+    let buf=bufnr('foo')
+    wincmd p
+    call appendbufline(buf, '$', range(1,200))
+    exe winnr. 'wincmd w'
+    norm! G
+    wincmd p
+    call deletebufline(buf, 1, '$')
+    call appendbufline(buf, '$', 'Hello Vim world...')
+  END
+  call writefile(lines, 'XscriptMatchCommon')
+  let buf = RunVimInTerminal('-S XscriptMatchCommon', #{rows: 10})
+  call term_wait(buf)
+  call VerifyScreenDump(buf, 'Test_appendbufline_1', {})
+
+  call StopVimInTerminal(buf)
+  call delete('XscriptMatchCommon')
+endfunc