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Minor improvement for tree-sitter explorer

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If you open an empty python buffer and type

1 + 2
a
b

Currently the explorer only displays the top-level node at point, ie,
only 1 + 2, only a, or only b. That's kind of awkward, so if the
buffer is small, show the entire parse tree.

* lisp/treesit.el (treesit--explorer-refresh): See above.
This commit is contained in:
Yuan Fu 2023-01-08 20:30:07 -08:00
parent ef87c75566
commit 1f8ad353d9
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GPG key ID: 56E19BC57664A442
1 changed files with 9 additions and 5 deletions
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8
lisp/treesit.el
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@ -2415,11 +2415,15 @@ in the region."
(window-start) (window-end) treesit--explorer-language))
;; Only highlight the current top-level construct.
;; Highlighting the whole buffer is slow and unnecessary.
(top-level (treesit-node-first-child-for-pos
;; But if the buffer is small (ie, used in playground
;; style), just highlight the whole buffer.
(top-level (if (< (buffer-size) 4000)
root
(treesit-node-first-child-for-pos
root (if (eolp)
(max (point-min) (1- (point)))
(point))
t))
t)))
;; Only highlight node when region is active, if we
;; highlight node at point the syntax tree is too jumpy.
(nodes-hl