Merge pull request #17187 from lewis6991/master

feat(highlight): ns=0 to set :highlight namespace

4 files changed, 130 insertions, 16 deletions

diff --git a/src/nvim/api/vim.c b/src/nvim/api/vim.c
index f7ea6bc4d3..e9182fde7f 100644
--- a/src/nvim/api/vim.c
+++ b/src/nvim/api/vim.c
@@ -32,6 +32,7 @@
 #include "nvim/fileio.h"
 #include "nvim/getchar.h"
 #include "nvim/highlight.h"
+#include "nvim/highlight_defs.h"
 #include "nvim/lua/executor.h"
 #include "nvim/mark.h"
 #include "nvim/memline.h"
@@ -122,7 +123,9 @@ Dictionary nvim__get_hl_defs(Integer ns_id, Error *err)
 
 /// Set a highlight group.
 ///
-/// @param ns_id number of namespace for this highlight
+/// @param ns_id number of namespace for this highlight. Use value 0
+///              to set a highlight group in the global (`:highlight`)
+///              namespace.
 /// @param name highlight group name, like ErrorMsg
 /// @param val highlight definition map, like |nvim_get_hl_by_name|.
 ///            in addition the following keys are also recognized:
@@ -136,18 +139,23 @@ Dictionary nvim__get_hl_defs(Integer ns_id, Error *err)
 ///                               same as attributes of gui color
 /// @param[out] err Error details, if any
 ///
-/// TODO: ns_id = 0, should modify :highlight namespace
-/// TODO val should take update vs reset flag
+// TODO(bfredl): val should take update vs reset flag
 void nvim_set_hl(Integer ns_id, String name, Dictionary val, Error *err)
   FUNC_API_SINCE(7)
 {
   int hl_id = syn_check_group(name.data, (int)name.size);
   int link_id = -1;
 
-  HlAttrs attrs = dict2hlattrs(val, true, &link_id, err);
+  HlAttrNames *names = NULL;  // Only used when setting global namespace
+  if (ns_id == 0) {
+    names = xmalloc(sizeof(*names));
+    *names = HLATTRNAMES_INIT;
+  }
+  HlAttrs attrs = dict2hlattrs(val, true, &link_id, names, err);
   if (!ERROR_SET(err)) {
-    ns_hl_def((NS)ns_id, hl_id, attrs, link_id);
+    ns_hl_def((NS)ns_id, hl_id, attrs, link_id, names);
   }
+  xfree(names);
 }
 
 /// Set active namespace for highlights.
diff --git a/src/nvim/highlight.c b/src/nvim/highlight.c
index 3050ca02de..83a6ccf38f 100644
--- a/src/nvim/highlight.c
+++ b/src/nvim/highlight.c
@@ -144,13 +144,19 @@ int hl_get_syn_attr(int ns_id, int idx, HlAttrs at_en)
   }
 }
 
-void ns_hl_def(NS ns_id, int hl_id, HlAttrs attrs, int link_id)
+void ns_hl_def(NS ns_id, int hl_id, HlAttrs attrs, int link_id, HlAttrNames *names)
 {
-  DecorProvider *p = get_decor_provider(ns_id, true);
   if ((attrs.rgb_ae_attr & HL_DEFAULT)
       && map_has(ColorKey, ColorItem)(&ns_hl, ColorKey(ns_id, hl_id))) {
     return;
   }
+  if (ns_id == 0) {
+    assert(names);
+    // set in global (':highlight') namespace
+    set_hl_group(hl_id, attrs, names, link_id);
+    return;
+  }
+  DecorProvider *p = get_decor_provider(ns_id, true);
   int attr_id = link_id > 0 ? -1 : hl_get_syn_attr(ns_id, hl_id, attrs);
   ColorItem it = { .attr_id = attr_id,
                    .link_id = link_id,
@@ -194,7 +200,7 @@ int ns_get_hl(NS ns_id, int hl_id, bool link, bool nodefault)
     if (ret.type == kObjectTypeDictionary) {
       Dictionary dict = ret.data.dictionary;
       fallback = false;
-      attrs = dict2hlattrs(dict, true, &it.link_id, &err);
+      attrs = dict2hlattrs(dict, true, &it.link_id, NULL, &err);
       for (size_t i = 0; i < dict.size; i++) {
         char *key = dict.items[i].key.data;
         Object val = dict.items[i].value;
@@ -796,7 +802,7 @@ Dictionary hlattrs2dict(HlAttrs ae, bool use_rgb)
   return hl;
 }
 
-HlAttrs dict2hlattrs(Dictionary dict, bool use_rgb, int *link_id, Error *err)
+HlAttrs dict2hlattrs(Dictionary dict, bool use_rgb, int *link_id, HlAttrNames *names, Error *err)
 {
   HlAttrs hlattrs = HLATTRS_INIT;
 
@@ -820,7 +826,7 @@ HlAttrs dict2hlattrs(Dictionary dict, bool use_rgb, int *link_id, Error *err)
       { "italic", HL_ITALIC },
       { "reverse", HL_INVERSE },
       { "default", HL_DEFAULT },
-      { "global", HL_GLOBAL },
+      // { "global", HL_GLOBAL },
       { NULL, 0 },
     };
 
@@ -857,13 +863,14 @@ HlAttrs dict2hlattrs(Dictionary dict, bool use_rgb, int *link_id, Error *err)
       const char *name;
       const char *shortname;
       int *dest;
+      char **dest_name;
     } colors[] = {
-      { "foreground", "fg", &fg },
-      { "background", "bg", &bg },
-      { "ctermfg", NULL, &ctermfg },
-      { "ctermbg", NULL, &ctermbg },
-      { "special", "sp", &sp },
-      { NULL, NULL, NULL },
+      { "foreground", "fg", &fg, names ? &names->fg_name : NULL },
+      { "background", "bg", &bg, names ? &names->bg_name : NULL },
+      { "ctermfg", NULL, &ctermfg, NULL },
+      { "ctermbg", NULL, &ctermbg, NULL },
+      { "special", "sp", &sp, names ? &names->sp_name : NULL },
+      { NULL, NULL, NULL, NULL },
     };
 
     int k;
@@ -876,6 +883,9 @@ HlAttrs dict2hlattrs(Dictionary dict, bool use_rgb, int *link_id, Error *err)
           // TODO(bfredl): be more fancy with "bg", "fg" etc
           if (str.size) {
             *colors[k].dest = name_to_color(str.data);
+            if (colors[k].dest_name) {
+              *colors[k].dest_name = str.data;
+            }
           }
         } else {
           api_set_error(err, kErrorTypeValidation,
diff --git a/src/nvim/highlight_defs.h b/src/nvim/highlight_defs.h
index 50a03e0c02..65374782b6 100644
--- a/src/nvim/highlight_defs.h
+++ b/src/nvim/highlight_defs.h
@@ -46,6 +46,18 @@ typedef struct attr_entry {
   .hl_blend = -1, \
 }
 
+typedef struct {
+  char *bg_name;
+  char *fg_name;
+  char *sp_name;
+} HlAttrNames;
+
+#define HLATTRNAMES_INIT (HlAttrNames) { \
+  .bg_name = NULL, \
+  .fg_name = NULL, \
+  .sp_name = NULL, \
+}
+
 /// Values for index in highlight_attr[].
 /// When making changes, also update hlf_names below!
 typedef enum {
diff --git a/src/nvim/syntax.c b/src/nvim/syntax.c
index a9447165c2..b383b290ba 100644
--- a/src/nvim/syntax.c
+++ b/src/nvim/syntax.c
@@ -6714,6 +6714,90 @@ int lookup_color(const int idx, const bool foreground, TriState *const boldp)
   return color;
 }
 
+void set_hl_group(int id, HlAttrs attrs, HlAttrNames *names, int link_id)
+{
+  int idx = id - 1;  // Index is ID minus one.
+
+  bool is_default = attrs.rgb_ae_attr & HL_DEFAULT;
+
+  // Return if "default" was used and the group already has settings
+  if (is_default && hl_has_settings(idx, true)) {
+    return;
+  }
+
+  HlGroup *g = &HL_TABLE()[idx];
+
+  if (link_id > 0) {
+    g->sg_cleared = false;
+    g->sg_link = link_id;
+    g->sg_script_ctx = current_sctx;
+    g->sg_script_ctx.sc_lnum += sourcing_lnum;
+    g->sg_set |= SG_LINK;
+    if (is_default) {
+      g->sg_deflink = link_id;
+      g->sg_deflink_sctx = current_sctx;
+      g->sg_deflink_sctx.sc_lnum += sourcing_lnum;
+    }
+    return;
+  }
+
+  g->sg_cleared = false;
+  g->sg_link = 0;
+  g->sg_gui = attrs.rgb_ae_attr;
+
+  g->sg_rgb_fg = attrs.rgb_fg_color;
+  g->sg_rgb_bg = attrs.rgb_bg_color;
+  g->sg_rgb_sp = attrs.rgb_sp_color;
+
+  struct {
+    char **dest; RgbValue val; char *name;
+  } cattrs[] = {
+    { &g->sg_rgb_fg_name, g->sg_rgb_fg, names->fg_name },
+    { &g->sg_rgb_bg_name, g->sg_rgb_bg, names->bg_name },
+    { &g->sg_rgb_sp_name, g->sg_rgb_sp, names->sp_name },
+    { NULL, -1, NULL },
+  };
+
+  for (int j = 0; cattrs[j].dest; j++) {
+    if (cattrs[j].val != -1) {
+      xfree(*cattrs[j].dest);
+      if (cattrs[j].name) {
+        *cattrs[j].dest = xstrdup(cattrs[j].name);
+      } else {
+        char hex_name[8];
+        snprintf(hex_name, sizeof(hex_name), "#%06x", cattrs[j].val);
+        *cattrs[j].dest = xstrdup(hex_name);
+      }
+    }
+  }
+
+  g->sg_cterm = attrs.cterm_ae_attr;
+  g->sg_cterm_bg = attrs.cterm_bg_color;
+  g->sg_cterm_fg = attrs.cterm_fg_color;
+  g->sg_cterm_bold = g->sg_cterm & HL_BOLD;
+  g->sg_blend = attrs.hl_blend;
+
+  g->sg_script_ctx = current_sctx;
+  g->sg_script_ctx.sc_lnum += sourcing_lnum;
+
+  // 'Normal' is special
+  if (STRCMP(g->sg_name_u, "NORMAL") == 0) {
+    cterm_normal_fg_color = g->sg_cterm_fg;
+    cterm_normal_bg_color = g->sg_cterm_bg;
+    normal_fg = g->sg_rgb_fg;
+    normal_bg = g->sg_rgb_bg;
+    normal_sp = g->sg_rgb_sp;
+    ui_default_colors_set();
+  } else {
+    g->sg_attr = hl_get_syn_attr(0, id, attrs);
+
+    // a cursor style uses this syn_id, make sure its attribute is updated.
+    if (cursor_mode_uses_syn_id(id)) {
+      ui_mode_info_set();
+    }
+  }
+}
+
 
 /// Handle ":highlight" command
 ///