GNU bug report logs - #5908
tooltip-show breaks with multiline tip on Emacs for Windows v22.2.1

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From: "D Chiesa" <dpchiesa <at> hotmail.com>
To: "Eli Zaretskii" <eliz <at> gnu.org>
Cc: 5908 <at> debbugs.gnu.org
Subject: bug#5908: tooltip-show breaks with multiline tip on Emacs for Windows v22.2.1
Date: Fri, 9 Apr 2010 10:18:27 -0400

> This is a known and a nasty problem, present in Emacs 23 as well.  The
> ugly part is that the behavior depends on the size of the font used
> for the tooltips.  If you play with that font's definition, you will
> eventually find a size where the clipping doesn't happen.  (The value
> depends on the size and resolution of your monitor.)
>
> Someone who knows much more about GUI display than I do should look
> into this, because I can spot nothing wrong in the code.
>

Thanks   I'll look into adjusting the font myself.
As another workaround, individuals can use advice on tooltip-show.  If you 
append a newline onto the text, it tends to display without clipping, 
although you get the opposite problem - too much dead space.


   (defun cheeso-reform-string (limit arg)
     (let ((orig arg) (modified "") (curline "") word
           (words (split-string arg " ")))
       (while words
         (progn
           (setq curline "")
           (while (and words (< (length curline) limit))
             (progn
               (setq word (car words))
               (setq words (cdr words))
               (setq curline (concat curline " " word))))
           (setq modified (concat modified curline "\n"))))
       (setq modified (concat modified " \n")))
     )



   (defadvice tooltip-show (before
                            flymake-csharp-fixup-tooltip
                            (arg &optional use-echo-area)
                            activate compile)
     (progn
       (if (and (not use-echo-area)
                (eq major-mode 'csharp-mode))
           (let ((orig (ad-get-arg 0)))
             (ad-set-arg 0 (cheeso-reform-string 72 orig))
             ))))

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