branch: externals/ement
commit 16e9595f01cb97e77713092d66ee4188149bd1f2
Author: Phil Sainty <p...@catalyst.net.nz>
Commit: Adam Porter <a...@alphapapa.net>
Change: (ement-room-mode) Set `filter-buffer-substring-function'
Strip the `line-prefix' and `wrap-prefix' text properties which are
used when formatting certain Matrix events, but which should not be
copied into other buffers.
---
ement-room.el | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/ement-room.el b/ement-room.el
index 9492c54ebc..12614fad8c 100644
--- a/ement-room.el
+++ b/ement-room.el
@@ -2610,6 +2610,8 @@ and erases the buffer.
imenu-create-index-function #'ement-room--imenu-create-index-function
;; TODO: Use EWOC header/footer for, e.g. typing messages.
ement-ewoc (ewoc-create #'ement-room--pp-thing))
+ ;; Prevent line/wrap-prefix formatting properties being included in copied
text.
+ (setq-local filter-buffer-substring-function
#'ement-room--buffer-substring-filter)
;; Set the URL handler. Note that `browse-url-handlers' was added in 28.1;
;; prior to that `browse-url-browser-function' served double-duty.
;; TODO: Remove compat code when requiring Emacs >=28.
@@ -2801,6 +2803,18 @@ data slot."
Needed to display things in the header line."
(replace-regexp-in-string (rx "%") "%%" string t t))
+(defun ement-room--buffer-substring-filter (beg end &optional delete)
+ "Value for `filter-buffer-substring-function' in Ement rooms.
+
+Strips the `line-prefix' and `wrap-prefix' text properties which
+are used when formatting certain Matrix events, but which should
+not be copied into other buffers."
+ (let ((string (funcall (default-value 'filter-buffer-substring-function)
+ beg end delete)))
+ (remove-list-of-text-properties
+ 0 (length string) '(line-prefix wrap-prefix) string)
+ string))
+
;;;;; Imenu
(defconst ement-room-timestamp-header-imenu-format "%Y-%m-%d (%A) %H:%M"
