fix(ui): forward 'rulerformat' to msg_ruler event neovim#35707

Problem:  A 'rulerformat' not part of the statusline is not emitted through
          msg_ruler events.
Solution: Build the message chunks to emit as a msg_ruler event.

Author: luukvbaal

runtime/doc/news.txt

@@ -201,6 +201,7 @@ EVENTS
 • |CmdlineLeavePre| triggered before preparing to leave the command line.
 • New `append` paremeter for |ui-messages| `msg_show` event.
 • New `msg_id` paremeter for |ui-messages| `msg_show` event.
+• 'rulerformat' is emitted as `msg_ruler` when not part of the statusline.
 • Creating or updating a progress message with |nvim_echo()| triggers a |Progress| event.
 
 HIGHLIGHTS

src/nvim/api/vim.c

@@ -2141,8 +2141,8 @@ DictAs(eval_statusline_ret) nvim_eval_statusline(String str, Dict(eval_statuslin
     if (opts->use_winbar) {
       fillchar = wp->w_p_fcs_chars.wbr;
     } else {
-      int attr;
-      fillchar = fillchar_status(&attr, wp);
+      hlf_T group;
+      fillchar = fillchar_status(&group, wp);
     }
   }
 

src/nvim/cmdexpand.c

@@ -513,17 +513,13 @@ static int wildmenu_match_len(expand_T *xp, char *s)
 /// @param matches  list of matches
 static void redraw_wildmenu(expand_T *xp, int num_matches, char **matches, int match, bool showtail)
 {
-  int len;
-  int clen;                     // length in screen cells
-  int attr;
-  int i;
   bool highlight = true;
   char *selstart = NULL;
   int selstart_col = 0;
   char *selend = NULL;
   static int first_match = 0;
   bool add_left = false;
-  int l;
+  int i, l;
 
   if (matches == NULL) {        // interrupted completion?
     return;
@@ -536,7 +532,7 @@ static void redraw_wildmenu(expand_T *xp, int num_matches, char **matches, int m
     highlight = false;
   }
   // count 1 for the ending ">"
-  clen = wildmenu_match_len(xp, SHOW_MATCH(match)) + 3;
+  int clen = wildmenu_match_len(xp, SHOW_MATCH(match)) + 3;  // length in screen cells
   if (match == 0) {
     first_match = 0;
   } else if (match < first_match) {
@@ -577,7 +573,10 @@ static void redraw_wildmenu(expand_T *xp, int num_matches, char **matches, int m
     }
   }
 
-  schar_T fillchar = fillchar_status(&attr, curwin);
+  int len;
+  hlf_T group;
+  schar_T fillchar = fillchar_status(&group, curwin);
+  int attr = win_hl_attr(curwin, (int)group);
 
   if (first_match == 0) {
     *buf = NUL;

src/nvim/option.c

@@ -2094,6 +2094,7 @@ static const char *did_set_laststatus(optset_T *args)
     win_comp_pos();
   }
 
+  status_redraw_curbuf();
   last_status(false);  // (re)set last window status line.
   return NULL;
 }

src/nvim/statusline.c

@@ -66,7 +66,6 @@ typedef enum {
 /// If inversion is possible we use it. Else '=' characters are used.
 void win_redr_status(win_T *wp)
 {
-  int attr;
   bool is_stl_global = global_stl_height() > 0;
   static bool busy = false;
 
@@ -92,15 +91,16 @@ void win_redr_status(win_T *wp)
     redraw_custom_statusline(wp);
   }
 
+  hlf_T group = HLF_C;
   // May need to draw the character below the vertical separator.
   if (wp->w_vsep_width != 0 && wp->w_status_height != 0 && redrawing()) {
     schar_T fillchar;
     if (stl_connected(wp)) {
-      fillchar = fillchar_status(&attr, wp);
+      fillchar = fillchar_status(&group, wp);
     } else {
-      attr = win_hl_attr(wp, HLF_C);
       fillchar = wp->w_p_fcs_chars.vert;
     }
+    int attr = win_hl_attr(wp, (int)group);
     grid_line_start(&default_gridview, W_ENDROW(wp));
     grid_line_put_schar(W_ENDCOL(wp), fillchar, attr);
     grid_line_flush();
@@ -208,15 +208,17 @@ void stl_fill_click_defs(StlClickDefinition *click_defs, StlClickRecord *click_r
   }
 }
 
-/// Redraw the status line, window bar or ruler of window "wp".
-/// When "wp" is NULL redraw the tab pages line from 'tabline'.
-static void win_redr_custom(win_T *wp, bool draw_winbar, bool draw_ruler)
+/// Redraw the status line, window bar, ruler or tabline.
+/// @param wp  target window, NULL for 'tabline'
+/// @param draw_winbar  redraw 'winbar'
+/// @param draw_ruler  redraw 'rulerformat'
+/// @param ui_event  emit UI-event instead of drawing
+static void win_redr_custom(win_T *wp, bool draw_winbar, bool draw_ruler, bool ui_event)
 {
   static bool entered = false;
-  int attr;
-  int row;
   int col = 0;
-  int maxwidth;
+  int attr, row, maxwidth;
+  hlf_T group;
   schar_T fillchar;
   char buf[MAXPATHL];
   char transbuf[MAXPATHL];
@@ -243,7 +245,8 @@ static void win_redr_custom(win_T *wp, bool draw_winbar, bool draw_ruler)
     stl = p_tal;
     row = 0;
     fillchar = schar_from_ascii(' ');
-    attr = HL_ATTR(HLF_TPF);
+    group = HLF_TPF;
+    attr = HL_ATTR(group);
     maxwidth = Columns;
     opt_idx = kOptTabline;
   } else if (draw_winbar) {
@@ -259,14 +262,15 @@ static void win_redr_custom(win_T *wp, bool draw_winbar, bool draw_ruler)
     }
 
     fillchar = wp->w_p_fcs_chars.wbr;
-    attr = (wp == curwin) ? win_hl_attr(wp, HLF_WBR) : win_hl_attr(wp, HLF_WBRNC);
+    group = (wp == curwin) ? HLF_WBR : HLF_WBRNC;
+    attr = win_hl_attr(wp, (int)group);
     maxwidth = wp->w_view_width;
     stl_clear_click_defs(wp->w_winbar_click_defs, wp->w_winbar_click_defs_size);
     wp->w_winbar_click_defs = stl_alloc_click_defs(wp->w_winbar_click_defs, maxwidth,
                                                    &wp->w_winbar_click_defs_size);
   } else {
     row = is_stl_global ? (Rows - (int)p_ch - 1) : W_ENDROW(wp);
-    fillchar = fillchar_status(&attr, wp);
+    fillchar = fillchar_status(&group, wp);
     const bool in_status_line = wp->w_status_height != 0 || is_stl_global;
     maxwidth = in_status_line && !is_stl_global ? wp->w_width : Columns;
     stl_clear_click_defs(wp->w_status_click_defs, wp->w_status_click_defs_size);
@@ -297,14 +301,15 @@ static void win_redr_custom(win_T *wp, bool draw_winbar, bool draw_ruler)
         grid = grid_adjust(&msg_grid_adj, &row, &col);
         maxwidth--;  // writing in last column may cause scrolling
         fillchar = schar_from_ascii(' ');
-        attr = HL_ATTR(HLF_MSG);
+        group = HLF_MSG;
       }
     } else {
       opt_idx = kOptStatusline;
       stl = ((*wp->w_p_stl != NUL) ? wp->w_p_stl : p_stl);
       opt_scope = ((*wp->w_p_stl != NUL) ? OPT_LOCAL : 0);
     }
 
+    attr = win_hl_attr(wp, (int)group);
     if (in_status_line && !is_stl_global) {
       col += wp->w_wincol;
     }
@@ -332,31 +337,57 @@ static void win_redr_custom(win_T *wp, bool draw_winbar, bool draw_ruler)
   int len = (int)strlen(buf);
   int start_col = col;
 
-  // Draw each snippet with the specified highlighting.
-  screengrid_line_start(grid, row, 0);
+  if (!ui_event) {
+    // Draw each snippet with the specified highlighting.
+    screengrid_line_start(grid, row, 0);
+  }
 
-  int curattr = attr;
   char *p = buf;
-  for (int n = 0; hltab[n].start != NULL; n++) {
-    int textlen = (int)(hltab[n].start - p);
-    // Make all characters printable.
-    size_t tsize = transstr_buf(p, textlen, transbuf, sizeof transbuf, true);
-    col += grid_line_puts(col, transbuf, (int)tsize, curattr);
-    p = hltab[n].start;
-
-    if (hltab[n].userhl == 0) {
+  int curattr = attr;
+  int curgroup = (int)group;
+  Array content = ARRAY_DICT_INIT;
+  for (stl_hlrec_t *sp = hltab;; sp++) {
+    int textlen = (int)(sp->start ? sp->start - p : buf + len - p);
+    // Make all characters printable. Use an empty string instead of p, if p is beyond buf + len.
+    size_t tsize = transstr_buf(p >= buf + len ? "" : p, textlen, transbuf, sizeof transbuf, true);
+    if (!ui_event) {
+      col += grid_line_puts(col, transbuf, (int)tsize, curattr);
+    } else {
+      Array chunk = ARRAY_DICT_INIT;
+      ADD(chunk, INTEGER_OBJ(curattr));
+      ADD(chunk, STRING_OBJ(cbuf_as_string(xmemdupz(transbuf, tsize), tsize)));
+      ADD(chunk, INTEGER_OBJ(curgroup));
+      ADD(content, ARRAY_OBJ(chunk));
+    }
+    p = sp->start;
+
+    if (p == NULL) {
+      break;
+    } else if (sp->userhl == 0) {
       curattr = attr;
-    } else if (hltab[n].userhl < 0) {
-      curattr = hl_combine_attr(attr, syn_id2attr(-hltab[n].userhl));
-    } else if (wp != NULL && wp != curwin && wp->w_status_height != 0) {
-      curattr = highlight_stlnc[hltab[n].userhl - 1];
+      curgroup = (int)group;
+    } else if (sp->userhl < 0) {
+      curattr = syn_id2attr(-sp->userhl);
+      curgroup = -sp->userhl;
     } else {
-      curattr = highlight_user[hltab[n].userhl - 1];
+      int *userhl = (wp != NULL && wp != curwin && wp->w_status_height != 0)
+                    ? highlight_stlnc : highlight_user;
+      char userbuf[5] = "User";
+      userbuf[4] = (char)sp->userhl + '0';
+      curattr = userhl[sp->userhl - 1];
+      curgroup = syn_name2id_len(userbuf, 5);
+    }
+    if (curattr != attr) {
+      curattr = hl_combine_attr(attr, curattr);
     }
   }
-  // Make sure to use an empty string instead of p, if p is beyond buf + len.
-  size_t tsize = transstr_buf(p >= buf + len ? "" : p, -1, transbuf, sizeof transbuf, true);
-  col += grid_line_puts(col, transbuf, (int)tsize, curattr);
+
+  if (ui_event) {
+    ui_call_msg_ruler(content);
+    api_free_array(content);
+    goto theend;
+  }
+
   int maxcol = start_col + maxwidth;
 
   // fill up with "fillchar"
@@ -389,7 +420,7 @@ void win_redr_winbar(win_T *wp)
   if (wp->w_winbar_height == 0 || !redrawing()) {
     // Do nothing.
   } else if (*p_wbr != NUL || *wp->w_p_wbr != NUL) {
-    win_redr_custom(wp, true, false);
+    win_redr_custom(wp, true, false, false);
   }
   entered = false;
 }
@@ -423,43 +454,21 @@ void redraw_ruler(void)
 
   // Don't draw the ruler while doing insert-completion, it might overwrite
   // the (long) mode message.
-  if (wp->w_status_height == 0 && !is_stl_global) {
-    if (edit_submode != NULL) {
-      return;
-    }
+  if (wp->w_status_height == 0 && !is_stl_global && edit_submode != NULL) {
+    return;
   }
 
-  if (*p_ruf && p_ch > 0 && !ui_has(kUIMessages)) {
-    win_redr_custom(wp, false, true);
+  bool part_of_status = wp->w_status_height || is_stl_global;
+  if (*p_ruf && (p_ch > 0 || (ui_has(kUIMessages) && !part_of_status))) {
+    win_redr_custom(wp, false, true, ui_has(kUIMessages));
     return;
   }
 
-  // Check if not in Insert mode and the line is empty (will show "0-1").
-  int empty_line = (State & MODE_INSERT) == 0
-                   && *ml_get_buf(wp->w_buffer, wp->w_cursor.lnum) == NUL;
-
-  int width;
-  schar_T fillchar;
-  int attr;
-  int off;
-  bool part_of_status = false;
-
-  if (wp->w_status_height) {
-    fillchar = fillchar_status(&attr, wp);
-    off = wp->w_wincol;
-    width = wp->w_width;
-    part_of_status = true;
-  } else if (is_stl_global) {
-    fillchar = fillchar_status(&attr, wp);
-    off = 0;
-    width = Columns;
-    part_of_status = true;
-  } else {
-    fillchar = schar_from_ascii(' ');
-    attr = HL_ATTR(HLF_MSG);
-    width = Columns;
-    off = 0;
-  }
+  hlf_T group = HLF_MSG;
+  int off = wp->w_status_height ? wp->w_wincol : 0;
+  int width = wp->w_status_height ? wp->w_width : Columns;
+  schar_T fillchar = part_of_status ? fillchar_status(&group, wp) : schar_from_ascii(' ');
+  int attr = win_hl_attr(wp, (int)group);
 
   // In list mode virtcol needs to be recomputed
   colnr_T virtcol = wp->w_virtcol;
@@ -469,6 +478,10 @@ void redraw_ruler(void)
     wp->w_p_list = true;
   }
 
+  // Check if not in Insert mode and the line is empty (will show "0-1").
+  int empty_line = (State & MODE_INSERT) == 0
+                   && *ml_get_buf(wp->w_buffer, wp->w_cursor.lnum) == NUL;
+
 #define RULER_BUF_LEN 70
   char buffer[RULER_BUF_LEN];
 
@@ -542,13 +555,13 @@ void redraw_ruler(void)
 }
 
 /// Get the character to use in a status line.  Get its attributes in "*attr".
-schar_T fillchar_status(int *attr, win_T *wp)
+schar_T fillchar_status(hlf_T *group, win_T *wp)
 {
   if (wp == curwin) {
-    *attr = win_hl_attr(wp, HLF_S);
+    *group = HLF_S;
     return wp->w_p_fcs_chars.stl;
   } else {
-    *attr = win_hl_attr(wp, HLF_SNC);
+    *group = HLF_SNC;
     return wp->w_p_fcs_chars.stlnc;
   }
 }
@@ -566,7 +579,7 @@ void redraw_custom_statusline(win_T *wp)
   }
   entered = true;
 
-  win_redr_custom(wp, false, false);
+  win_redr_custom(wp, false, false, false);
   entered = false;
 }
 
@@ -644,7 +657,7 @@ void draw_tabline(void)
 
   // Use the 'tabline' option if it's set.
   if (*p_tal != NUL) {
-    win_redr_custom(NULL, false, false);
+    win_redr_custom(NULL, false, false, false);
   } else {
     int tabcount = 0;
     int col = 0;

src/nvim/statusline.h

@@ -2,6 +2,7 @@
 
 #include <stddef.h>
 
+#include "nvim/highlight_defs.h"
 #include "nvim/macros_defs.h"
 #include "nvim/option_defs.h"  // IWYU pragma: keep
 #include "nvim/statusline_defs.h"  // IWYU pragma: keep

test/functional/legacy/statusline_spec.lua

@@ -12,6 +12,15 @@ describe('statusline', function()
 
   before_each(function()
     screen = Screen.new(50, 7)
+    screen:add_extra_attr_ids({
+      [100] = {
+        background = Screen.colors.Red,
+        foreground = Screen.colors.Gray100,
+        reverse = true,
+        bold = true,
+      },
+      [101] = { foreground = Screen.colors.Blue, reverse = true, bold = true },
+    })
   end)
 
   it('is updated in cmdline mode when using window-local statusline vim-patch:8.2.2737', function()
@@ -51,7 +60,7 @@ describe('statusline', function()
     screen:expect([[
       ^                                                  |
       {1:~                                                 }|*4
-      {9:<F}{18:GHI                                             }|
+      {100:<F}{101:GHI                                             }|
                                                         |
     ]])
   end)