Merge pull request #19962 from zeertzjq/vim-9.0.0278

vim-patch:9.0.{0278,0279,0283,0284}: cmdline completion patches

runtime/doc/options.txt

@@ -6940,12 +6940,15 @@ A jump table for the options with a short description can be found at |Q_op|.
 				*'wildmenu'* *'wmnu'* *'nowildmenu'* *'nowmnu'*
 'wildmenu' 'wmnu'	boolean	(default on)
 			global
-	Enables "enhanced mode" of command-line completion. When user hits
-	<Tab> (or 'wildchar') to invoke completion, the possible matches are
-	shown in a menu just above the command-line (see 'wildoptions'), with
-	the first match highlighted (overwriting the statusline).  Keys that
-	show the previous/next match (<Tab>/CTRL-P/CTRL-N) highlight the
-	match.
+	When 'wildmenu' is on, command-line completion operates in an enhanced
+	mode.  On pressing 'wildchar' (usually <Tab>) to invoke completion,
+	the possible matches are shown.
+	When 'wildoptions' contains "pum", then the completion matches are
+	shown in a popup menu.  Otherwise they are displayed just above the
+	command line, with the first match highlighted (overwriting the status
+	line, if there is one).
+	Keys that show the previous/next match, such as <Tab> or
+	CTRL-P/CTRL-N, cause the highlight to move to the appropriate match.
 	'wildmode' must specify "full": "longest" and "list" do not start
 	'wildmenu' mode. You can check the current mode with |wildmenumode()|.
 	The menu is canceled when a key is hit that is not used for selecting

src/nvim/cmdhist.c

@@ -90,14 +90,14 @@ static char *(history_names[]) = {
 /// arguments of the ":history command.
 char *get_history_arg(expand_T *xp, int idx)
 {
-  static char_u compl[2] = { NUL, NUL };
-  char *short_names = ":=@>?/";
-  int short_names_count = (int)STRLEN(short_names);
-  int history_name_count = ARRAY_SIZE(history_names) - 1;
+  const char *short_names = ":=@>?/";
+  const int short_names_count = (int)STRLEN(short_names);
+  const int history_name_count = ARRAY_SIZE(history_names) - 1;
 
   if (idx < short_names_count) {
-    compl[0] = (char_u)short_names[idx];
-    return (char *)compl;
+    xp->xp_buf[0] = short_names[idx];
+    xp->xp_buf[1] = NUL;
+    return xp->xp_buf;
   }
   if (idx < short_names_count + history_name_count) {
     return history_names[idx - short_names_count];

src/nvim/ex_cmds_defs.h

@@ -237,6 +237,8 @@ struct expand {
   int xp_col;                   // cursor position in line
   char **xp_files;              // list of files
   char *xp_line;                // text being completed
+#define EXPAND_BUF_LEN 256
+  char xp_buf[EXPAND_BUF_LEN];  // buffer for returned match
 };
 
 // values for xp_backslash

src/nvim/ex_getln.c

@@ -1808,6 +1808,7 @@ static int command_line_handle_key(CommandLineState *s)
       // menu (if present)
       cmdline_pum_cleanup(&ccline);
     }
+
     if (nextwild(&s->xpc, WILD_ALL, 0, s->firstc != '@') == FAIL) {
       break;
     }

src/nvim/fileio.c

@@ -337,7 +337,9 @@ int readfile(char *fname, char *sfname, linenr_T from, linenr_T lines_to_skip,
     curbuf->b_op_start = orig_start;
 
     if (flags & READ_NOFILE) {
-      return NOTDONE;  // so that BufEnter can be triggered
+      // Return NOTDONE instead of FAIL so that BufEnter can be triggered
+      // and other operations don't fail.
+      return NOTDONE;
     }
   }
 

src/nvim/os/env.c

@@ -1156,15 +1156,12 @@ char *home_replace_save(buf_T *buf, const char *src)
 /// Function given to ExpandGeneric() to obtain an environment variable name.
 char *get_env_name(expand_T *xp, int idx)
 {
-#define ENVNAMELEN 100
-  // this static buffer is needed to avoid a memory leak in ExpandGeneric
-  static char_u name[ENVNAMELEN];
   assert(idx >= 0);
   char *envname = os_getenvname_at_index((size_t)idx);
   if (envname) {
-    STRLCPY(name, envname, ENVNAMELEN);
+    STRLCPY(xp->xp_buf, envname, EXPAND_BUF_LEN);
     xfree(envname);
-    return (char *)name;
+    return xp->xp_buf;
   }
   return NULL;
 }

src/nvim/syntax.c

@@ -5665,6 +5665,7 @@ static enum {
   EXP_CASE,         // expand ":syn case" arguments
   EXP_SPELL,        // expand ":syn spell" arguments
   EXP_SYNC,         // expand ":syn sync" arguments
+  EXP_CLUSTER,      // expand ":syn list @cluster" arguments
 } expand_what;
 
 /*
@@ -5712,10 +5713,16 @@ void set_context_in_syntax_cmd(expand_T *xp, const char *arg)
         expand_what = EXP_SPELL;
       } else if (STRNICMP(arg, "sync", p - arg) == 0) {
         expand_what = EXP_SYNC;
+      } else if (STRNICMP(arg, "list", p - arg) == 0) {
+        p = skipwhite(p);
+        if (*p == '@') {
+          expand_what = EXP_CLUSTER;
+        } else {
+          xp->xp_context = EXPAND_HIGHLIGHT;
+        }
       } else if (STRNICMP(arg, "keyword", p - arg) == 0
                  || STRNICMP(arg, "region", p - arg) == 0
-                 || STRNICMP(arg, "match", p - arg) == 0
-                 || STRNICMP(arg, "list", p - arg) == 0) {
+                 || STRNICMP(arg, "match", p - arg) == 0) {
         xp->xp_context = EXPAND_HIGHLIGHT;
       } else {
         xp->xp_context = EXPAND_NOTHING;
@@ -5749,6 +5756,14 @@ char *get_syntax_name(expand_T *xp, int idx)
       "maxlines=", "minlines=", "region", NULL };
     return sync_args[idx];
   }
+  case EXP_CLUSTER:
+    if (idx < curwin->w_s->b_syn_clusters.ga_len) {
+      vim_snprintf(xp->xp_buf, EXPAND_BUF_LEN, "@%s",
+                   SYN_CLSTR(curwin->w_s)[idx].scl_name);
+      return xp->xp_buf;
+    } else {
+      return NULL;
+    }
   }
   return NULL;
 }

src/nvim/testdir/test_syntax.vim

@@ -198,6 +198,10 @@ func Test_syntax_completion()
 
   call feedkeys(":syn match \<C-A>\<C-B>\"\<CR>", 'tx')
   call assert_match('^"syn match @boolean @character ', @:)
+
+  syn cluster Aax contains=Aap
+  call feedkeys(":syn list @A\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_match('^"syn list @Aax', @:)
 endfunc
 
 func Test_echohl_completion()