fix(treesitter): redraw added/removed injections properly (#23287)

When injections are added or removed make sure to:
- invoke 'changedtree' callbacks for when new trees are added.
- invoke 'changedtree' callbacks for when trees are invalidated
- redraw regions when languagetree children are removed

1 files changed, 15 insertions, 12 deletions

diff --git a/runtime/doc/treesitter.txt b/runtime/doc/treesitter.txt
index 94690f0b7f..0168b11499 100644
--- a/runtime/doc/treesitter.txt
+++ b/runtime/doc/treesitter.txt
@@ -1149,21 +1149,24 @@ LanguageTree:parse({self})                              *LanguageTree:parse()*
     Return: ~
         TSTree[]
 
-LanguageTree:register_cbs({self}, {cbs})         *LanguageTree:register_cbs()*
+                                                 *LanguageTree:register_cbs()*
+LanguageTree:register_cbs({self}, {cbs}, {recursive})
     Registers callbacks for the |LanguageTree|.
 
     Parameters: ~
-      • {cbs}   (table) An |nvim_buf_attach()|-like table argument with the
-                following handlers:
-                • `on_bytes` : see |nvim_buf_attach()|, but this will be called after the parsers callback.
-                • `on_changedtree` : a callback that will be called every time
-                  the tree has syntactical changes. It will only be passed one
-                  argument, which is a table of the ranges (as node ranges)
-                  that changed.
-                • `on_child_added` : emitted when a child is added to the
-                  tree.
-                • `on_child_removed` : emitted when a child is removed from
-                  the tree.
+      • {cbs}         (table) An |nvim_buf_attach()|-like table argument with
+                      the following handlers:
+                      • `on_bytes` : see |nvim_buf_attach()|, but this will be called after the parsers callback.
+                      • `on_changedtree` : a callback that will be called
+                        every time the tree has syntactical changes. It will
+                        only be passed one argument, which is a table of the
+                        ranges (as node ranges) that changed.
+                      • `on_child_added` : emitted when a child is added to
+                        the tree.
+                      • `on_child_removed` : emitted when a child is removed
+                        from the tree.
+      • {recursive?}  boolean Apply callbacks recursively for all children.
+                      Any new children will also inherit the callbacks.
       • {self}
 
 LanguageTree:source({self})                            *LanguageTree:source()*