textobj: add incremental scope selection

1 files changed, 22 insertions, 0 deletions

diff --git a/lua/nvim-treesitter/textobj.lua b/lua/nvim-treesitter/textobj.lua
index 9460e193..a28440e3 100644
--- a/lua/nvim-treesitter/textobj.lua
+++ b/lua/nvim-treesitter/textobj.lua
@@ -33,4 +33,26 @@ function M.node_incremental()
   end
 end
 
+function M.scope_incremental()
+  local _, sel_start_line, sel_start_col, _ = unpack(vim.fn.getpos("'<"))
+  local _, sel_end_line, sel_end_col, _ = unpack(vim.fn.getpos("'>"))
+
+  if parsers.has_parser() then
+    local root = parsers.get_parser():parse():root()
+    local node = utils.smallest_containing_scope(
+    root:named_descendant_for_range(sel_start_line-1, sel_start_col-1, sel_end_line-1, sel_end_col))
+
+    local node_start_row, node_start_col, node_end_row, node_end_col = node:range()
+
+    if (sel_start_line-1) == node_start_row and (sel_start_col-1) == node_start_col
+      and (sel_end_line-1) == node_end_row and sel_end_col == node_end_col then
+      return node_range_to_vim(utils.smallest_containing_scope(node:parent() or node))
+    else
+      return node_range_to_vim(node)
+    end
+  else
+    return node_range_to_vim()
+  end
+end
+
 return M