Add Treesitter extensions for better textobjects (#700)

This adds three plugins that use treesitters parsing to provide smarter text objects

[ts_textobjects](https://github.com/nvim-treesitter/nvim-treesitter-textobjects) lets you define text objects for things like functions and classes

[ts_textsubjects](https://github.com/RRethy/nvim-treesitter-textsubjects.git) defines a smart text object that selects a semantic block around the cursor

[ts_hintobjects](https://github.com/mfussenegger/nvim-ts-hint-textobject) uses easymotion style hint labeling to show all the surrounding semantic blocks, letting you choose the correct one

I have also added which-key entries for all the above

Co-authored-by: Christian Chiarulli <[email protected]>

1 files changed, 18 insertions, 0 deletions

diff --git a/lua/plugins.lua b/lua/plugins.lua
index aadca5d6..86c2c628 100644
--- a/lua/plugins.lua
+++ b/lua/plugins.lua
@@ -478,6 +478,24 @@ return require("packer").startup(function(use)
     requires = "hrsh7th/nvim-compe",
     disable = not O.plugin.tabnine.active,
   }
+
+  -- Custom semantic text objects
+  use {
+    "nvim-treesitter/nvim-treesitter-textobjects",
+    disable = not O.plugin.ts_textobjects.active,
+  }
+  -- Smart text objects
+  use {
+    "RRethy/nvim-treesitter-textsubjects",
+    disable = not O.plugin.ts_textsubjects.active,
+  }
+  -- Text objects using hint labels
+  use {
+    "mfussenegger/nvim-ts-hint-textobject",
+    event = "BufRead",
+    disable = not O.plugin.ts_hintobjects.active,
+  }
+
   for _, plugin in pairs(O.custom_plugins) do
     packer.use(plugin)
   end