Make disable accept a function

Replaces the condition setting (though it does the exact inverse)

doc/nvim-treesitter.txt

@@ -74,14 +74,9 @@ Each module corresponds to an entry in the dictionary passed to the
   EOF
 <
 
-All modules share some common options, like `enable`, `disable`, and
+All modules share some common options, like `enable` and `disable`.
-`condition`.
 When `enable` is `true` this will enable the module for all supported languages,
 if you want to disable the module for some languages you can pass a list to the `disable` option.
-For more fine-grained control, `condition` takes a function and whenever it returns
-`false` the module is disabled for that buffer.
-The `condition` function is called once when a module starts in a buffer and
-received the language and the buffer number as arguments.
 
 >
   lua <<EOF
@@ -97,6 +92,24 @@ received the language and the buffer number as arguments.
   EOF
 <
 
+For more fine-grained control, `disabled` can also take a function and
+whenever it returns `true`, the module is disabled for that buffer.
+The function is called once when a module starts in a buffer and receives the
+language and buffer number as arguments:
+
+>
+  lua <<EOF
+  require'nvim-treesitter.configs'.setup {
+    highlight = {
+      enable = true,
+      disable = function(lang, bufnr) -- Disable in large C++ buffers
+        return lang == "cpp" and api.nvim_buf_line_count(bufnr) > 50000
+      end,
+    },
+  }
+  EOF
+<
+
 Options that define or accept a keymap use the same format you use to define
 keymaps in Neovim, so you can write keymaps as  `gd`, `<space>a`, `<leader>a`
 `<C-a>` (control + a), `<A-n>` (alt + n), `<CR>` (enter), etc.

lua/nvim-treesitter/configs.lua

@@ -23,15 +23,16 @@ local builtin_modules = {
   highlight = {
     module_path = "nvim-treesitter.highlight",
     enable = false,
-    disable = { "markdown" }, -- FIXME(vigoux): markdown highlighting breaks everything for now
     custom_captures = {},
-    is_supported = queries.has_highlights,
+    is_supported = function(lang)
+      -- FIXME(vigoux): markdown highlighting breaks everything for now
+      return lang ~= "markdown" and queries.has_highlights(lang)
+    end,
     additional_vim_regex_highlighting = false,
   },
   incremental_selection = {
     module_path = "nvim-treesitter.incremental_selection",
     enable = false,
-    disable = {},
     keymaps = {
       init_selection = "gnn",
       node_incremental = "grn",
@@ -45,7 +46,6 @@ local builtin_modules = {
   indent = {
     module_path = "nvim-treesitter.indent",
     enable = false,
-    disable = {},
     is_supported = queries.has_indents,
   },
 }
@@ -351,16 +351,21 @@ function M.is_enabled(mod, lang, bufnr)
     return false
   end
 
-  if module_config.condition and not module_config.condition(lang, bufnr) then
+  local disable = module_config.disable
-    return false
+  if type(disable) == 'function' then
-  end
+    if disable(lang, bufnr) then
-
-  for _, parser in pairs(module_config.disable) do
-    if lang == parser then
       return false
     end
+  elseif type(disable) == 'table' then
+    -- Otherwise it's a list of languages
+    for _, parser in pairs(disable) do
+      if lang == parser then
+        return false
+      end
+    end
   end
 
+
   return true
 end