bug#30746: window-text-pixel-width includes width of following propertized space

["Clément Pit-Claudel" <clement.pitclaudel@live.com>]

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Hi all,

I'm trying to measure strings in an Emacs buffer.  The current code is yielding surprising results:

(progn
  (save-excursion
    (insert #("s " 1 2 (display (space :width (50))))))
  (window-text-pixel-size nil (point) (1+ (point))))

On my machine a single 's' is 8 pixels wide, but this snippet returns 58.  

The following snippet, however, returns 8 as expected:

(progn
  (save-excursion
    (insert "s "))
  (window-text-pixel-size nil (point) (1+ (point))))

It seems that adding a display property on the space changes the return value of window-text-pixel-size; is that expected?

Thanks,
Clément.


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