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[Giovanni Piredda <address@hidden>]

On 02.09.21 18:12, Giovanni Piredda wrote:
> On 02.09.21 13:56, vincent douce wrote:
> > hi
> > in the esc-esc-$ mode, if i type a=2 then esc-esc-& i get aligned 
> > equations (esc-esc-& mode)
> > very useful
> > a) please what is the shortcut to exchange between $ mode (equation) 
> > and esc-esc-$ mode (centered equation)
> > knowing it would be useful for me to navigate between these 3modes
>
>
> I do not know if there is a shortcut; for making one I would start 
> from either this example of the Scheme developer manual, which turns :
which turns a subscript into a superscript :-)


> (tm-define (special t) (and-with p (tree-outer t) (special p)))
>
> (tm-define (special) (:require (tree-is? t 'rsub)) (tree-set! t `(rsup 
> ,(tree-ref t 0))))
>
> substituting (focus-tree) for t
>
> or from the definition of the menu button for changing inline into 
> display formulae (from progs/math/math-menu.scm):
>
> (tm-menu (focus-variant-menu t)
>   (:require (tree-in? t '(math equation equation*)))
>   ("Inline formula" (variant-formula t))
>   ("Displayed formula" (variant-equation t)))
>
> where again t needs to be substituted by (focus-tree).
>
> I do not have immediately time for this, but if noone else does it 
> before me I shall try to provide the working code within one/two days. 
> By the way to find the code I used the search functionality of GitHub: 
> I search for "Inline formula" (which is the text which appears in the 
> button) and then restrict the search to Scheme functions; often most 
> of the search results can be excluded immediately (e.g. files for 
> translations) and one needs to look through a few files only. I know 
> that the software ack (https://beyondgrep.com/) is also a powerful 
> search tool, but I have been lazy and I haven't yet learnt it :-)
>
> > b) if i type in esc-esc-$ mode : a=2+2<=>a=4 and then esc-esc-& i 
> > don't get the expected result
> > though, i would find it very useful to consider that <=> has 
> > something like an anteriority among =
> > i mean,  a=2+2<=>a=4 after esc-esc-& may give :
> > ...........a=2+2
> > ...<=>a=4
> > what do you think ?
>
> Same :-) Here I think I would start from the definition of the ctrl-& 
> shortcut :-)
>
>
>
> > Vincent