treesitter: default start and end row when omitted

Add support for default start and end row when omitted in the
query:iter_captures and query:iter_matches functions.

When the start and end row values are omitted, the values of the given
node is used. The end row value is incremented by 1 to include the node end
row in the match.

Updated tests and docs accordingly.

1 files changed, 12 insertions, 0 deletions

diff --git a/runtime/lua/vim/treesitter/query.lua b/runtime/lua/vim/treesitter/query.lua
index 5a27d740a2..9d1f265e54 100644
--- a/runtime/lua/vim/treesitter/query.lua
+++ b/runtime/lua/vim/treesitter/query.lua
@@ -353,6 +353,12 @@ function Query:iter_captures(node, source, start, stop)
   if type(source) == "number" and source == 0 then
     source = vim.api.nvim_get_current_buf()
   end
+
+  if start == nil and stop == nil then
+    start, _, stop, _ = node:range()
+    stop = stop + 1 -- Make stop inclusive
+  end
+
   local raw_iter = node:_rawquery(self.query, true, start, stop)
   local function iter()
     local capture, captured_node, match = raw_iter()
@@ -385,6 +391,12 @@ function Query:iter_matches(node, source, start, stop)
   if type(source) == "number" and source == 0 then
     source = vim.api.nvim_get_current_buf()
   end
+
+  if start == nil and stop == nil then
+    start, _, stop, _ = node:range()
+    stop = stop + 1 -- Make stop inclusive
+  end
+
   local raw_iter = node:_rawquery(self.query, false, start, stop)
   local function iter()
     local pattern, match = raw_iter()