CODEWITHSUNDEEP
emacstooltip
toomas
toomas

Reputation: 670

render HTML in Emacs tooltip?

I would like to display HTML with bold and italic text in Emacs tooltips. The solution I am trying is like this:

(let ((html "regular <b>bold</b> regular <i>italic</i> regular\n")
      (bufname "* render-html-tmp*"))
  (with-current-buffer (get-buffer-create bufname)
    (erase-buffer)
    (insert html)
    (shr-render-region (point-min) (point-max))
    (tooltip-show (buffer-string))))

In the * render-html-tmp* buffer the bold and italic text show up all right, but in the tooltip all the five words are in plain regular text, without bold or italic. Changing the value of x-gtk-use-system-tooltips has no effect.

At the same time, when I go to the end of the * render-html-tmp* buffer and do (insert (buffer-string)) there, or copy the buffer contents into the kill ring and yank it into a new buffer, the bold and italic attributes do show up correctly in the inserted or yanked text. So my basic idea should be right, and I am at my wit's end trying to figure out why I am not seeing these attributes in the tooltip.

What's going on, and how to make the bold and italic text show up in the tooltip?

Upvotes: 0

Views: 350

Answers (1)

NickD
NickD

Reputation: 6412

tooltip-show overrides the face property of the string that is passed into it and replaces it with its own tooltip property:

      (x-show-tip (propertize text 'face 'tooltip)
              (selected-frame)
              params
              tooltip-hide-delay
              tooltip-x-offset
              tooltip-y-offset))
      ...

As the OP mentions in a comment, defining a modified tooltip-show to pass text directly to x-show-tip instead of doing the (propertize text ...) and calling that from his code resolves the problem.

Upvotes: 1

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