refactor(treesitter): {start,stop} are optional in Query:iter_* methods

Document that the `start` and `stop` parameters in
`Query:iter_captures()` and `Query:iter_matches()` are optional.

The tree-sitter lib has been bumped up to 0.20.9, so we also no longer
need "Requires treesitter >= 0.20.9".

2 files changed, 22 insertions, 18 deletions

diff --git a/runtime/doc/treesitter.txt b/runtime/doc/treesitter.txt
index 1402753f15..f6ee2ef425 100644
--- a/runtime/doc/treesitter.txt
+++ b/runtime/doc/treesitter.txt
@@ -1086,8 +1086,10 @@ Query:iter_captures({node}, {source}, {start}, {stop})
       • {node}    (`TSNode`) under which the search will occur
       • {source}  (`integer|string`) Source buffer or string to extract text
                   from
-      • {start}   (`integer`) Starting line for the search
-      • {stop}    (`integer`) Stopping line for the search (end-exclusive)
+      • {start}   (`integer?`) Starting line for the search. Defaults to
+                  `node:start()`.
+      • {stop}    (`integer?`) Stopping line for the search (end-exclusive).
+                  Defaults to `node:end_()`.
 
     Return: ~
         (`fun(end_line: integer?): integer, TSNode, TSMetadata`) capture id,
@@ -1119,13 +1121,14 @@ Query:iter_matches({node}, {source}, {start}, {stop}, {opts})
     Parameters: ~
       • {node}    (`TSNode`) under which the search will occur
       • {source}  (`integer|string`) Source buffer or string to search
-      • {start}   (`integer`) Starting line for the search
-      • {stop}    (`integer`) Stopping line for the search (end-exclusive)
-      • {opts}    (`table?`) Options:
+      • {start}   (`integer?`) Starting line for the search. Defaults to
+                  `node:start()`.
+      • {stop}    (`integer?`) Stopping line for the search (end-exclusive).
+                  Defaults to `node:end_()`.
+      • {opts}    (`table?`) Optional keyword arguments:
                   • max_start_depth (integer) if non-zero, sets the maximum
                     start depth for each match. This is used to prevent
-                    traversing too deep into a tree. Requires treesitter >=
-                    0.20.9.
+                    traversing too deep into a tree.
 
     Return: ~
         (`fun(): integer, table<integer,TSNode>, table`) pattern id, match,
diff --git a/runtime/lua/vim/treesitter/query.lua b/runtime/lua/vim/treesitter/query.lua
index 7631c6c4a2..cd65c0d7f6 100644
--- a/runtime/lua/vim/treesitter/query.lua
+++ b/runtime/lua/vim/treesitter/query.lua
@@ -672,14 +672,16 @@ end
 --- Returns the start and stop value if set else the node's range.
 -- When the node's range is used, the stop is incremented by 1
 -- to make the search inclusive.
----@param start integer
----@param stop integer
+---@param start integer|nil
+---@param stop integer|nil
 ---@param node TSNode
 ---@return integer, integer
 local function value_or_node_range(start, stop, node)
-  if start == nil and stop == nil then
-    local node_start, _, node_stop, _ = node:range()
-    return node_start, node_stop + 1 -- Make stop inclusive
+  if start == nil then
+    start = node:start()
+  end
+  if stop == nil then
+    stop = node:end_() + 1 -- Make stop inclusive
   end
 
   return start, stop
@@ -710,8 +712,8 @@ end
 ---
 ---@param node TSNode under which the search will occur
 ---@param source (integer|string) Source buffer or string to extract text from
----@param start integer Starting line for the search
----@param stop integer Stopping line for the search (end-exclusive)
+---@param start? integer Starting line for the search. Defaults to `node:start()`.
+---@param stop? integer Stopping line for the search (end-exclusive). Defaults to `node:end_()`.
 ---
 ---@return (fun(end_line: integer|nil): integer, TSNode, TSMetadata):
 ---        capture id, capture node, metadata
@@ -769,12 +771,11 @@ end
 ---
 ---@param node TSNode under which the search will occur
 ---@param source (integer|string) Source buffer or string to search
----@param start integer Starting line for the search
----@param stop integer Stopping line for the search (end-exclusive)
----@param opts table|nil Options:
+---@param start? integer Starting line for the search. Defaults to `node:start()`.
+---@param stop? integer Stopping line for the search (end-exclusive). Defaults to `node:end_()`.
+---@param opts? table Optional keyword arguments:
 ---   - max_start_depth (integer) if non-zero, sets the maximum start depth
 ---     for each match. This is used to prevent traversing too deep into a tree.
----     Requires treesitter >= 0.20.9.
 ---
 ---@return (fun(): integer, table<integer,TSNode>, table): pattern id, match, metadata
 function Query:iter_matches(node, source, start, stop, opts)