feat(autocmd): conceal html class attributes (#311)

lua/custom/autocommands.lua

@@ -132,7 +132,7 @@ vim.api.nvim_create_autocmd({ 'LspAttach' }, {
 
         -- rename current symbol
         if capabilities.renameProvider then
-            vim.keymap.set('n', '<leader>R', vim.lsp.buf.rename, { buffer = args.buf })
+            vim.keymap.set('n', '<leader>R', ':IncRename ', { buffer = args.buf })
         end
 
         -- show code actions available
@@ -146,3 +146,35 @@ vim.api.nvim_create_autocmd({ 'LspAttach' }, {
         end
     end,
 })
+
+vim.api.nvim_create_autocmd({ 'BufEnter', 'BufWritePost', 'TextChanged', 'InsertLeave' }, {
+    pattern = { '*.html', '*.php', '*.blade' },
+    callback = function()
+        local bufnr = vim.api.nvim_get_current_buf()
+        local conceal_ns = vim.api.nvim_create_namespace('class_conceal')
+
+        local language_tree = vim.treesitter.get_parser(bufnr, 'html')
+        local syntax_tree = language_tree:parse()
+        local root = syntax_tree[1]:root()
+
+        local query = vim.treesitter.query.parse(
+            'html',
+            [[
+    ((attribute
+        (attribute_name) @att_name (#eq? @att_name "class")
+        (quoted_attribute_value (attribute_value) @class_value) (#set! @class_value conceal "…")))
+    ]]
+        )
+
+        for _, captures, metadata in query:iter_matches(root, bufnr, root:start(), root:end_()) do
+            local start_row, start_col, end_row, end_col = captures[2]:range()
+            vim.api.nvim_buf_set_extmark(bufnr, conceal_ns, start_row, start_col, {
+                end_line = end_row,
+                end_col = end_col,
+                conceal = metadata[2].conceal,
+            })
+        end
+    end,
+    ---Ref: https://gist.github.com/mactep/430449fd4f6365474bfa15df5c02d27b
+    desc = 'Conceal HTML class attributes. Ideal for big TailwindCSS class lists',
+})