Alt-o, Alt-i and the other tree-sitter keys walk the file's syntax tree

helix's expand/shrink, previous/next sibling, all siblings, all children and
parent-node end/start (Alt-o/up, Alt-i/down, Alt-p/left, Alt-right, Alt-a,
Alt-I, Alt-e, Alt-b; Alt-n stays the new terminal) walk a whole-file parse
the file keeps (File.node_tree), made on the first such key after an edit and
reused until the next, never per key. syntax.walkNodes follows helix's
TreeCursor over every node, anonymous ones included, and Alt-i goes back to
what Alt-o grew from while the selection still holds it. The harness runs
without grammars, so the cases prove the plain-text no-op; a test replays
eleven JSON walks whose results were taken from the installed hx.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 1 insertions, 0 deletions

diff --git a/test/hxcases/cases.jsonl b/test/hxcases/cases.jsonl
index 43cbbf11..8a8f8a94 100644
--- a/test/hxcases/cases.jsonl
+++ b/test/hxcases/cases.jsonl
@@ -440,6 +440,7 @@
 {"name": "keep-regex-lines", "pane": "file", "text": "foo\nbar\nbaz\n", "keys": "%<A-s>K^b<ret>"}
 {"name": "ensure-forward", "pane": "file", "text": "ab cd\n", "keys": "%s\\w+<ret><A-;><A-:>"}
 {"name": "ensure-forward-one", "pane": "file", "text": "abc\n", "keys": "vll<A-;><A-:>"}
+{"name": "node-keys-plain-text", "pane": "file", "text": "ab cd\n", "keys": "w<A-o><A-i><A-p><A-right><A-a><A-I><A-e><A-b>"}
 {"name": "msel-align-basic", "pane": "file", "text": "a=1\nbbb=2\n", "keys": "%s=<ret>&"}
 {"name": "msel-align-columns", "pane": "file", "text": "a,b,c\nccc,d,e\n", "keys": "%s,<ret>&"}
 {"name": "msel-align-uneven", "pane": "file", "text": "a,b\nccc,d,eee,f\n", "keys": "%s,<ret>&"}