Merge b8c1b36061 into 435dee74bb

Problem:  Enabling ext_messages claims to set 'cmdheight' to zero, but
only does so for the current tabpage.
Solution: Set stored 'cmdheight' value to zero for all tabpages.

runtime/doc/builtin.txt

@@ -8208,6 +8208,10 @@ synconcealed({lnum}, {col})                                     *synconcealed()*
 			synconcealed(lnum, 5)   [1, 'X', 2]
 			synconcealed(lnum, 6)   [0, '', 0]
 
+		Note: Doesn't consider |matchadd()| highlighting items,
+		since syntax and matching highlighting are two different
+		mechanisms |syntax-vs-match|.
+
 synstack({lnum}, {col})                                             *synstack()*
 		Return a |List|, which is the stack of syntax items at the
 		position {lnum} and {col} in the current window.  {lnum} is

runtime/doc/pattern.txt

@@ -1375,6 +1375,19 @@ Finally, these constructs are unique to Perl:
 ==============================================================================
 10. Highlighting matches				*match-highlight*
 
+							*syntax-vs-match*
+		Note that the match highlight mechanism is independent
+		of |syntax-highlighting|, which is (usually) a buffer-local
+		highlighting, while matching is window-local, both methods
+		can be freely mixed.  Match highlighting functions give you
+		a bit more flexibility in when and how to apply, but are
+		typically only used for temporary highlighting, without strict
+		rules.  Both methods can be used to conceal text.
+
+		Thus the matching functions like |matchadd()| won't consider
+		syntax rules and functions like |synconcealed()| and the
+		other way around.
+
 							*:mat* *:match*
 :mat[ch] {group} /{pattern}/
 		Define a pattern to highlight in the current window.  It will

runtime/doc/syntax.txt

@@ -3825,7 +3825,9 @@ Whether or not it is actually concealed depends on the value of the
 'conceallevel' option.  The 'concealcursor' option is used to decide whether
 concealable items in the current line are displayed unconcealed to be able to
 edit the line.
-Another way to conceal text is with |matchadd()|.
+
+Another way to conceal text is with |matchadd()|, but internally this works a
+bit differently |syntax-vs-match|.
 
 concealends						*:syn-concealends*
 
@@ -3833,7 +3835,9 @@ When the "concealends" argument is given, the start and end matches of
 the region, but not the contents of the region, are marked as concealable.
 Whether or not they are actually concealed depends on the setting on the
 'conceallevel' option. The ends of a region can only be concealed separately
-in this way when they have their own highlighting via "matchgroup"
+in this way when they have their own highlighting via "matchgroup".  The
+|synconcealed()| function can be used to retrieve information about conealed
+items.
 
 cchar							*:syn-cchar*
 							*E844*

runtime/doc/usr_41.txt

@@ -948,7 +948,7 @@ Syntax and highlighting:	  *syntax-functions* *highlighting-functions*
 	synIDattr()		get a specific attribute of a syntax ID
 	synIDtrans()		get translated syntax ID
 	synstack()		get list of syntax IDs at a specific position
-	synconcealed()		get info about concealing
+	synconcealed()		get info about (syntax) concealing
 	diff_hlID()		get highlight ID for diff mode at a position
 	matchadd()		define a pattern to highlight (a "match")
 	matchaddpos()		define a list of positions to highlight

runtime/lua/vim/_meta/vimfn.lua

@@ -9752,6 +9752,10 @@ function vim.fn.synIDtrans(synID) end
 ---   synconcealed(lnum, 5)   [1, 'X', 2]
 ---   synconcealed(lnum, 6)   [0, '', 0]
 ---
+--- Note: Doesn't consider |matchadd()| highlighting items,
+--- since syntax and matching highlighting are two different
+--- mechanisms |syntax-vs-match|.
+---
 --- @param lnum integer
 --- @param col integer
 --- @return {[1]: integer, [2]: string, [3]: integer}

src/nvim/buffer_defs.h

@@ -47,8 +47,8 @@ typedef struct {
 #define VALID_VIRTCOL   0x04    // w_virtcol (file col) is valid
 #define VALID_CHEIGHT   0x08    // w_cline_height and w_cline_folded valid
 #define VALID_CROW      0x10    // w_cline_row is valid
-#define VALID_BOTLINE   0x20    // w_botine and w_empty_rows are valid
-#define VALID_BOTLINE_AP 0x40   // w_botine is approximated
+#define VALID_BOTLINE   0x20    // w_botline and w_empty_rows are valid
+#define VALID_BOTLINE_AP 0x40   // w_botline is approximated
 #define VALID_TOPLINE   0x80    // w_topline is valid (for cursor position)
 
 // flags for b_flags

src/nvim/eval.lua

@@ -11621,6 +11621,10 @@ M.funcs = {
       	synconcealed(lnum, 4)   [1, 'X', 2]
       	synconcealed(lnum, 5)   [1, 'X', 2]
       	synconcealed(lnum, 6)   [0, '', 0]
+
+      Note: Doesn't consider |matchadd()| highlighting items,
+      since syntax and matching highlighting are two different
+      mechanisms |syntax-vs-match|.
     ]=],
     name = 'synconcealed',
     params = { { 'lnum', 'integer' }, { 'col', 'integer' } },

src/nvim/ui.c

@@ -194,15 +194,6 @@ void ui_refresh(void)
     abort();
   }
 
-  if (!ui_active()) {
-    return;
-  }
-
-  if (updating_screen) {
-    ui_schedule_refresh();
-    return;
-  }
-
   int width = INT_MAX;
   int height = INT_MAX;
   bool ext_widgets[kUIExtCount];
@@ -227,18 +218,29 @@ void ui_refresh(void)
     if (i < kUIGlobalCount) {
       ext_widgets[i] |= ui_cb_ext[i];
     }
-    // Set 'cmdheight' to zero when ext_messages becomes active.
+    // Set 'cmdheight' to zero when ext_messages becomes active for all tabpages.
     if (i == kUIMessages && !ui_ext[i] && ext_widgets[i]) {
       set_option_value(kOptCmdheight, NUMBER_OPTVAL(0), 0);
       command_height();
+      FOR_ALL_TABS(tp) {
+        tp->tp_ch_used = 0;
+      }
     }
     ui_ext[i] = ext_widgets[i];
     if (i < kUIGlobalCount) {
-      ui_call_option_set(cstr_as_string(ui_ext_names[i]),
-                         BOOLEAN_OBJ(ext_widgets[i]));
+      ui_call_option_set(cstr_as_string(ui_ext_names[i]), BOOLEAN_OBJ(ext_widgets[i]));
     }
   }
 
+  if (!ui_active()) {
+    return;
+  }
+
+  if (updating_screen) {
+    ui_schedule_refresh();
+    return;
+  }
+
   ui_default_colors_set();
 
   int save_p_lz = p_lz;

src/nvim/window.c

@@ -2467,6 +2467,7 @@ void win_init_empty(win_T *wp)
   wp->w_topline = 1;
   wp->w_topfill = 0;
   wp->w_botline = 2;
+  wp->w_valid = 0;
   wp->w_s = &wp->w_buffer->b_s;
 }
 

test/functional/lua/ui_event_spec.lua

@@ -155,6 +155,21 @@ describe('vim.ui_attach', function()
       },
     }, actual, vim.inspect(actual))
   end)
+
+  it('ui_refresh() works without remote UI', function()
+    screen:detach()
+    exec_lua('vim.ui_attach(ns, { ext_messages = true }, on_event)')
+    n.api.nvim_set_option_value('cmdheight', 1, {})
+    screen:attach()
+    eq(1, n.api.nvim_get_option_value('cmdheight', {}))
+  end)
+
+  it("ui_refresh() sets 'cmdheight' for all open tabpages with ext_messages", function()
+    exec_lua('vim.cmd.tabnew()')
+    exec_lua('vim.ui_attach(ns, { ext_messages = true }, on_event)')
+    exec_lua('vim.cmd.tabnext()')
+    eq(0, n.api.nvim_get_option_value('cmdheight', {}))
+  end)
 end)
 
 describe('vim.ui_attach', function()

test/old/testdir/test_autocmd.vim

@@ -4105,4 +4105,16 @@ func Test_SwapExists_set_other_buf_modified()
   bwipe!
 endfunc
 
+func Test_BufEnter_botline()
+  set hidden
+  call writefile(range(10), 'Xxx1', 'D')
+  call writefile(range(20), 'Xxx2', 'D')
+  edit Xxx1
+  edit Xxx2
+  au BufEnter Xxx1 call assert_true(line('w$') > 1)
+  edit Xxx1
+  au! BufEnter Xxx1
+  set hidden&vim
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab