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Simplify reactive text replacement to directly reset properties with new values

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Co-authored-by: Kinneyzhang <38454496+Kinneyzhang@users.noreply.github.com>
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copilot-swe-agent[bot] 2026-01-08 03:43:55 +00:00
parent 7d7979c54c
commit 6b96d8575f
1 changed files with 14 additions and 33 deletions
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47
tp.el
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@ -1093,20 +1093,12 @@ it will be applied to the text before updating."
(save-excursion
(tp--replace-reactive-text-in-buffer layer-name new-text props)))))))))))
(defvar tp-preserve-external-properties '(keymap mouse-face cursor pointer help-echo)
"List of text properties to preserve during reactive text updates.
These properties are typically set by external libraries (like twidget's event
system) and should not be overwritten when tp.el updates reactive text.
Properties in this list will be preserved from the buffer during updates,
while other properties will be replaced with the new values.")
(defun tp--replace-reactive-text-in-buffer (layer-name new-text props)
"Replace text in current buffer for reactive text with LAYER-NAME.
NEW-TEXT is the new text to replace with.
PROPS are the properties to apply to the new text.
+Text properties embedded in NEW-TEXT are merged with PROPS.
+Properties listed in `tp-preserve-external-properties' that were applied
+by other libraries are preserved during the update."
Text properties embedded in NEW-TEXT are merged with PROPS.
The new properties completely reset/replace the old properties."
(goto-char (point-min))
(let ((match (text-property-search-forward 'tp-name layer-name t))
;; Merge embedded text properties from new-text into props
@ -1114,29 +1106,18 @@ PROPS are the properties to apply to the new text.
(while match
(let* ((m-start (prop-match-beginning match))
(m-end (prop-match-end match))
(old-text (buffer-substring-no-properties m-start m-end))
;; Preserve only specific external properties
(existing-props (text-properties-at m-start))
(preserved-props nil))
;; Extract only the explicitly listed external properties to preserve
(dolist (prop-name tp-preserve-external-properties)
(let ((val (plist-get existing-props prop-name)))
(when (and val (not (plist-member merged-props prop-name)))
(setq preserved-props
(plist-put preserved-props prop-name val)))))
;; Combine merged-props with preserved external props
(let ((final-props (append merged-props preserved-props)))
(if (equal old-text (substring-no-properties new-text))
;; Text content is the same, but properties may differ
;; Use set-text-properties to replace with final properties
(set-text-properties m-start m-end final-props)
;; Text content is different - delete old text and insert new
(delete-region m-start m-end)
(goto-char m-start)
(insert (substring-no-properties new-text))
;; Apply final properties
(let ((new-end (+ m-start (length new-text))))
(set-text-properties m-start new-end final-props)))))
(old-text (buffer-substring-no-properties m-start m-end)))
(if (equal old-text (substring-no-properties new-text))
;; Text content is the same, but properties may differ
;; Use set-text-properties to reset with new properties
(set-text-properties m-start m-end merged-props)
;; Text content is different - delete old text and insert new
(delete-region m-start m-end)
(goto-char m-start)
(insert (substring-no-properties new-text))
;; Apply new properties
(let ((new-end (+ m-start (length new-text))))
(set-text-properties m-start new-end merged-props))))
;; Search for next match
(setq match (text-property-search-forward 'tp-name layer-name t)))))