refactor(api): use hl id directly in nvim_buf_set_extmark

src/nvim/api/extmark.c

@@ -14,6 +14,7 @@
 #include "nvim/buffer_defs.h"
 #include "nvim/charset.h"
 #include "nvim/decoration.h"
+#include "nvim/decoration_defs.h"
 #include "nvim/decoration_provider.h"
 #include "nvim/drawscreen.h"
 #include "nvim/extmark.h"
@@ -540,36 +541,15 @@ Integer nvim_buf_set_extmark(Buffer buffer, Integer ns_id, Integer line, Integer
     col2 = (int)val;
   }
 
-  // uncrustify:off
+  hl.hl_id = (int)opts->hl_group;
+  has_hl = hl.hl_id > 0;
+  sign.hl_id = (int)opts->sign_hl_group;
+  sign.cursorline_hl_id = (int)opts->cursorline_hl_group;
+  sign.number_hl_id = (int)opts->number_hl_group;
+  sign.line_hl_id = (int)opts->line_hl_group;
 
-  // TODO(bfredl): keyset type alias for hl_group? (nil|int|string)
-  struct {
-    const char *name;
-    Object *opt;
-    int *dest;
-  } hls[] = {
-    { "hl_group"           , &opts->hl_group           , &hl.hl_id            },
-    { "sign_hl_group"      , &opts->sign_hl_group      , &sign.hl_id       },
-    { "number_hl_group"    , &opts->number_hl_group    , &sign.number_hl_id     },
-    { "line_hl_group"      , &opts->line_hl_group      , &sign.line_hl_id       },
-    { "cursorline_hl_group", &opts->cursorline_hl_group, &sign.cursorline_hl_id },
-    { NULL, NULL, NULL },
-  };
-
-  // uncrustify:on
-
-  for (int j = 0; hls[j].name && hls[j].dest; j++) {
-    if (hls[j].opt->type != kObjectTypeNil) {
-      if (j > 0) {
-        sign.flags |= kSHIsSign;
-      } else {
-        has_hl = true;
-      }
-      *hls[j].dest = object_to_hl_id(*hls[j].opt, hls[j].name, err);
-      if (ERROR_SET(err)) {
-        goto error;
-      }
-    }
+  if (sign.hl_id || sign.cursorline_hl_id || sign.number_hl_id || sign.line_hl_id) {
+    sign.flags |= kSHIsSign;
   }
 
   if (HAS_KEY(opts, set_extmark, conceal)) {

src/nvim/api/keysets_defs.h

@@ -28,7 +28,7 @@ typedef struct {
   Integer end_line;
   Integer end_row;
   Integer end_col;
-  Object hl_group;
+  Integer hl_group;
   Array virt_text;
   String virt_text_pos;
   Integer virt_text_win_col;
@@ -46,10 +46,10 @@ typedef struct {
   Boolean virt_lines_leftcol;
   Boolean strict;
   String sign_text;
-  Object sign_hl_group;
-  Object number_hl_group;
-  Object line_hl_group;
-  Object cursorline_hl_group;
+  Integer sign_hl_group;
+  Integer number_hl_group;
+  Integer line_hl_group;
+  Integer cursorline_hl_group;
   String conceal;
   Boolean spell;
   Boolean ui_watched;

src/nvim/api/private/defs.h

@@ -135,6 +135,7 @@ typedef struct {
   size_t ptr_off;
   ObjectType type;  // kObjectTypeNil == untyped
   int opt_index;
+  bool is_hlgroup;
 } KeySetLink;
 
 typedef KeySetLink *(*FieldHashfn)(const char *str, size_t len);

src/nvim/api/private/helpers.c

@@ -936,13 +936,26 @@ bool api_dict_to_keydict(void *retval, FieldHashfn hashy, Dictionary dict, Error
 
     char *mem = ((char *)retval + field->ptr_off);
     Object *value = &dict.items[i].value;
+
     if (field->type == kObjectTypeNil) {
       *(Object *)mem = *value;
     } else if (field->type == kObjectTypeInteger) {
-      VALIDATE_T(field->str, kObjectTypeInteger, value->type, {
-        return false;
-      });
-      *(Integer *)mem = value->data.integer;
+      if (field->is_hlgroup) {
+        int hl_id = 0;
+        if (value->type != kObjectTypeNil) {
+          hl_id = object_to_hl_id(*value, k.data, err);
+          if (ERROR_SET(err)) {
+            return false;
+          }
+        }
+        *(Integer *)mem = hl_id;
+      } else {
+        VALIDATE_T(field->str, kObjectTypeInteger, value->type, {
+          return false;
+        });
+
+        *(Integer *)mem = value->data.integer;
+      }
     } else if (field->type == kObjectTypeFloat) {
       Float *val = (Float *)mem;
       if (value->type == kObjectTypeInteger) {