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Clarify the semantics of 'string-pixel-width'

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* doc/lispref/display.texi (Size of Displayed Text):
* lisp/emacs-lisp/subr-x.el (string-pixel-width):
* src/xdisp.c (Fwindow_text_pixel_size, Fbuffer_text_pixel_size):
Doc fixes.  (Bug#73129)
This commit is contained in:
Eli Zaretskii 2024-09-09 14:28:12 +03:00
parent 9f0603207b
commit 03e5698167
3 changed files with 13 additions and 5 deletions
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6
lisp/emacs-lisp/subr-x.el
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@ -338,7 +338,11 @@ This construct can only be used with lexical binding."
;;;###autoload
(defun string-pixel-width (string)
"Return the width of STRING in pixels."
"Return the width of STRING in pixels.
If you call this function to measure pixel width of a string
with embedded newlines, it returns the width of the widest
substring that does not include newlines."
(declare (important-return-value t))
(if (zerop (length string))
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