nvim: plugins/treesitter: Use treehopper instead of textobjects

The whole bunch of treesitter text objects were difficult to remember
and we ended up rarely ever using any of the defined mappings.

treehopper simplifies things with a single mapping and hints.

nvim/.config/nvim/lua/plugins.lua

@@ -75,8 +75,7 @@ local init = function ()
         cmd   = { "TSPlaygroundToggle", "TSHighlightCapturesUnderCursor" },
       },
       {
-        "nvim-treesitter/nvim-treesitter-textobjects",
-        module = "nvim-treesitter-textobjects",
+        "mfussenegger/nvim-treehopper",
         after = "nvim-treesitter",
       },
     },

nvim/.config/nvim/lua/treesitter.lua

@@ -1,78 +1,9 @@
--- Required to enable textobjects. See
--- https://github.com/nvim-treesitter/nvim-treesitter-textobjects/issues/100.
-require'nvim-treesitter-textobjects'
-
 local ts_langs = { "bash", "cpp", "fish", "go", "haskell", "html", "java", "javascript", "jsdoc", "json", "markdown", "nix", "python", "query", "rust", "teal", "toml", "tsx", "typescript", "verilog" }
 
 require'nvim-treesitter.install'.compilers = { "gcc" }
 require'nvim-treesitter.configs'.setup {
   ensure_installed = ts_langs,
   highlight        = { enable = true, },
-  textobjects = {
-    select = {
-      enable    = true,
-      lookahead = true,
-      keymaps = {
-	["ab"] = "@block.outer"      ,
-	["ib"] = "@block.inner"      ,
-	-- We use M,m for call/conditional as C/c would conflict with textobj-word-column
-	["aM"] = "@call.outer"       ,
-	["iM"] = "@call.inner"       ,
-	["ao"] = "@class.outer"      ,
-	["io"] = "@class.inner"      ,
-	["at"] = "@comment.outer"    ,
-	["am"] = "@conditional.outer",
-	["im"] = "@conditional.inner",
-	["af"] = "@function.outer"   ,
-	["if"] = "@function.inner"   ,
-	["al"] = "@loop.outer"       ,
-	["il"] = "@loop.inner"       ,
-	["ap"] = "@parameter.outer"  ,
-	["ip"] = "@parameter.inner"  ,
-	["is"] = "@scopename.inner"  ,
-	["as"] = "@statement.outer"  ,
-      },
-    },
-    swap = {
-      enable        = true,
-      swap_next     = {
-	["<Leader>sb"] = "@block.outer"    ,
-	["<Leader>sl"] = "@call.outer"     ,
-	["<Leader>sc"] = "@class.outer"    ,
-	["<Leader>sf"] = "@function.outer" ,
-	["<Leader>sp"] = "@parameter.inner",
-	["<Leader>ss"] = "@statement.outer",
-      },
-      swap_previous = {
-	["<Leader>sB"] = "@block.outer"    ,
-	["<Leader>sL"] = "@call.outer"     ,
-	["<Leader>sC"] = "@class.outer"    ,
-	["<Leader>sF"] = "@function.outer" ,
-	["<Leader>sP"] = "@parameter.inner",
-	["<Leader>sS"] = "@statement.outer",
-      },
-    },
-    move = {
-      enable    = true,
-      set_jumps = true,
-      goto_next_start = {
-	["]m"] = "@function.outer",
-	["]s"] = "@class.outer",
-      },
-      goto_next_end = {
-	["]M"] = "@function.outer",
-	["]S"] = "@class.outer",
-      },
-      goto_previous_start = {
-	["[m"] = "@function.outer",
-	["[s"] = "@class.outer",
-      },
-      goto_previous_end = {
-	["[M"] = "@function.outer",
-	["[S"] = "@class.outer",
-      },
-    },
-  },
   query_linter = {
     enable           = true,
     use_virtual_text = true,
@@ -100,3 +31,6 @@ require'nvim-treesitter.configs'.setup {
     enable = true,
   },
 }
+
+vim.keymap.set('o', '<Leader>m', ':<C-U>lua require(\'tsht\').nodes()<CR>', { noremap=false, unique=true, silent=true })
+vim.keymap.set('x', '<Leader>m', ':lua require(\'tsht\').nodes()<CR>' , { noremap=true , unique=true, silent=true })