Re: Emacs revision #107149

[Stefan Monnier]

> I Don't understand.  Why is the forcing of immediate fontification ever
> necessary?  That's what JIT lock does, isn't it?

JIT lock is only involved when the buffer is displayed directly.
In htmlfontify or ps-print, we need to fontify the buffer even if it's
not displayed because the output (HTML or Postscript) wants to include
the fact info that font-lock adds.

In the mm-view case it's similar: the buffer itself is not displayed,
instead its content is copied into some other buffer (which uses
another major-mode).  We could setup this other buffer so that jit-lock
there is redirected to apply font-lock to the internal buffer after
which the result is copied back into the displayed buffer, but instead
mm-view just font-locks the whole buffer eagerly, which is simpler, tho
it loses the laziness of jit-lock.


        Stefan