feat: TailwindCSS highlight support (#143)

* Initial tailwind support

* Implement to all autocomplete drawers

* Fix formatting

Author: wustho

lua/blink/cmp/utils.lua

@@ -83,4 +83,20 @@ function utils.get_regex_around_cursor(range, regex, exclude_from_prefix_regex)
   return { start_col = start_col, length = length }
 end
 
+--- @param ctx blink.cmp.CompletionRenderContext
+--- @return string|nil
+function utils.try_get_tailwind_hl(ctx)
+  local doc = ctx.item.documentation
+  if ctx.kind == 'Color' and doc then
+    local content = type(doc) == 'string' and doc or doc.value
+    if ctx.kind == 'Color' and content and content:match('^#%x%x%x%x%x%x$') then
+      local hl_name = 'HexColor' .. content:sub(2)
+      if #vim.api.nvim_get_hl(0, { name = hl_name }) == 0 then
+        vim.api.nvim_set_hl(0, hl_name, { fg = content })
+      end
+      return hl_name
+    end
+  end
+end
+
 return utils

lua/blink/cmp/windows/autocomplete.lua

@@ -51,6 +51,7 @@
 --- @field draw_item_minimal blink.cmp.CompletionDrawFn
 
 local config = require('blink.cmp.config')
+local utils = require('blink.cmp.utils')
 local renderer = require('blink.cmp.windows.lib.render')
 local text_edits_lib = require('blink.cmp.accept.text-edits')
 local autocmp_config = config.windows.autocomplete
@@ -358,7 +359,11 @@ end
 function autocomplete.draw_item_simple(ctx)
   return {
     ' ',
-    { ctx.kind_icon, ctx.icon_gap, hl_group = 'BlinkCmpKind' .. ctx.kind },
+    {
+      ctx.kind_icon,
+      ctx.icon_gap,
+      hl_group = utils.try_get_tailwind_hl(ctx) or ('BlinkCmpKind' .. ctx.kind),
+    },
     {
       ctx.label,
       ctx.kind == 'Snippet' and '~' or '',
@@ -384,7 +389,12 @@ function autocomplete.draw_item_reversed(ctx)
       max_width = 50,
     },
     ' ',
-    { ctx.kind_icon, ctx.icon_gap, ctx.kind, hl_group = 'BlinkCmpKind' .. ctx.kind },
+    {
+      ctx.kind_icon,
+      ctx.icon_gap,
+      ctx.kind,
+      hl_group = utils.try_get_tailwind_hl(ctx) or ('BlinkCmpKind' .. ctx.kind),
+    },
     ' ',
   }
 end
@@ -402,7 +412,10 @@ function autocomplete.draw_item_minimal(ctx)
       max_width = 50,
     },
     ' ',
-    { ctx.kind, hl_group = 'BlinkCmpKind' .. ctx.kind },
+    {
+      ctx.kind,
+      hl_group = utils.try_get_tailwind_hl(ctx) or ('BlinkCmpKind' .. ctx.kind),
+    },
     ' ',
   }
 end