program outlining

program outlining

[Rusi]

Ive been trying to figure out the best outlining that emacs can give for
programs.

Outline-mode seems to be more for text than code
Outshine mode inspired by above+org-mode seemed promising in that it seems to
make org mode's wonderful TAB-behavior work for code.
But I couldn’t get it to work

So hideshow…
But hideshow keystrokes are clumsy

Even with the suggestions of
http://stackoverflow.com/questions/791539/how-can-i-have-folds-for-c-java-in-emacs
to do

(add-hook 'c-mode-common-hook
  (lambda()
    (local-set-key (kbd "C-c <right>") 'hs-show-block)
    (local-set-key (kbd "C-c <left>")  'hs-hide-block)
    (local-set-key (kbd "C-c <up>")    'hs-hide-all)
    (local-set-key (kbd "C-c <down>")  'hs-show-all)
    (hs-minor-mode t)))

its better than the builtin defaults but not nearly as neat as org's
all-purpose TAB and Shift-TAB.

Is it so hard to do org's TAB cycling
ie hs-show-block and hs-hide-block on the same key in cycle?

Re: program outlining

[Kaushal Modi]

Outshine works fine for me, along with the TAB and s-TAB (<backtab>)
behavior, and I use it everyday in emacs-lisp-mode and other modes like
shell-script-mode and verilog-mode.

Here's my outshine setup:
https://github.com/kaushalmodi/.emacs.d/blob/master/setup-files/setup-outshine.el

If you ignore the 'modi/outline-toc' function definition in the above link,
there's very little configuration I need to do for outshine. The only
important config is to set the outline-minor-mode-prefix and adding
outshine-hook-function to outline-minor-mode-hook.


On Mon, Jul 11, 2016, 9:00 AM Rusi <rustompmody@gmail.com> wrote:

> Outshine mode inspired by above+org-mode seemed promising in that it seems
> to
> make org mode's wonderful TAB-behavior work for code.
> But I couldn’t get it to work
>
-- 

-- 
Kaushal Modi

Re: program outlining

[Rusi]

On Monday, July 11, 2016 at 7:18:18 PM UTC+5:30, Kaushal Modi wrote:
> Outshine works fine for me, along with the TAB and s-TAB (<backtab>)
> behavior, and I use it everyday in emacs-lisp-mode and other modes like
> shell-script-mode and verilog-mode.
> 
> Here's my outshine setup:
> https://github.com/kaushalmodi/.emacs.d/blob/master/setup-files/setup-outshine.el
> 
> If you ignore the 'modi/outline-toc' function definition in the above link,
> there's very little configuration I need to do for outshine. The only
> important config is to set the outline-minor-mode-prefix and adding
> outshine-hook-function to outline-minor-mode-hook.



Looks impressive
How does it work?
Which modes?

I can load this file alright
But thereafter outshine is so undocumented that I dont know what next

On a different note does outshine understand programming language syntax?
Or does it need addition of org-style 'cookies'?
Because if latter its not much use for arbitrary codebases
(which hideshow seems to handle at least somewhat)

Re: program outlining

[Rusi]

On Monday, July 11, 2016 at 7:42:10 PM UTC+5:30, Rusi wrote:
> On Monday, July 11, 2016 at 7:18:18 PM UTC+5:30, Kaushal Modi wrote:
> > Outshine works fine for me, along with the TAB and s-TAB (<backtab>)
> > behavior, and I use it everyday in emacs-lisp-mode and other modes like
> > shell-script-mode and verilog-mode.
> > 
> > Here's my outshine setup:
> > https://github.com/kaushalmodi/.emacs.d/blob/master/setup-files/setup-outshine.el
> > 
> > If you ignore the 'modi/outline-toc' function definition in the above link,
> > there's very little configuration I need to do for outshine. The only
> > important config is to set the outline-minor-mode-prefix and adding
> > outshine-hook-function to outline-minor-mode-hook.
> 
> 
> 
> Looks impressive
> How does it work?
> Which modes?
> 
> I can load this file alright
> But thereafter outshine is so undocumented that I dont know what next
> 
> On a different note does outshine understand programming language syntax?
> Or does it need addition of org-style 'cookies'?
> Because if latter its not much use for arbitrary codebases
> (which hideshow seems to handle at least somewhat)

I guess the closest to what is required is org-hideshow.
On first trial seems to work though a bit bitrotten

Here's an extract showing its a bit out of date

===============================
(defmacro hs-org/define-keys ()
  `(progn 
     ,@(mapcar (lambda (key) `(hs-org/define-key ,key hs-org/hideshow)) hs-org/trigger-keys-block)
     ,@(mapcar (lambda (key) `(hs-org/define-key ,key hs-org/hideshow-all)) hs-org/trigger-keys-all)
     ))

;; No closures is killing me!
(defmacro hs-org/define-key (key function)
  `(define-key hs-org/minor-mode-map ,key (lambda () (interactive)
                                                  (,function ,key))))
=================================

I guess the “no closures” gripe is not true after lexical binding??

Re: program outlining

[Eli Zaretskii]

> Date: Mon, 11 Jul 2016 05:59:59 -0700 (PDT)
> From: Rusi <rustompmody@gmail.com>
> 
> Ive been trying to figure out the best outlining that emacs can give for
> programs.

Did you try selective-display (C-x $)?

Re: program outlining

[Kaushal Modi]

On Mon, Jul 11, 2016 at 10:19 AM Rusi <rustompmody@gmail.com> wrote:

> How does it work?
>

That's a very broad question. Here's an attempt to quickly explain this.
outshine mode works by piggybacking on outline-minor-mode. So you enable
outline-minor-mode where you want outshine to work.


> Which modes?
>

I already have that in my posted outshine config:

    (defvar modi/outline-minor-mode-hooks '(verilog-mode-hook
                                            emacs-lisp-mode-hook
                                            conf-space-mode-hook) ; for
.tmux.conf
      "List of hooks of major modes in which `outline-minor-mode' should be
enabled.")


> I can load this file alright
>

Loading just this file will *not* work. There are dependencies in it on my
minor mode, and probably other things too. It's part of my whole config. So
I wouldn't expect it to work independently.


> But thereafter outshine is so undocumented that I dont know what next
>

I found the documentation here to be adequate:
https://github.com/tj64/outshine#installation

You need to pose specific questions.. Check for yourself if the outshine
mode is getting enabled when it should (when you enable outline-minor-mode
in any major mode)

On a different note does outshine understand programming language syntax?
>

It uses a major-mode's comment syntax to detect headlines.

For emacs-lisp-mode,

;;; heading level 1
;;;; heading level 2
;;;;; heading level 3

For all other modes, it detects org-like heading syntax with that
major-mode's comment chars as prefix.

For verilog-mode,

// * heading level 1
// ** heading level 2
// *** heading level 3

For shell-script-mode,

# * heading level 1
# ** heading level 2
# *** heading level 3



> Or does it need addition of org-style 'cookies'?
>

(as explained above)


> Because if latter its not much use for arbitrary codebases
>

Yes, outshine does need adding special syntax headings as shown above. If
you are able to add those, and others in your team do not mind it, do it.
Because for everyone not using emacs/outshine, they are as good as regular
comments and it will not affect the code's functionality.


> (which hideshow seems to handle at least somewhat)
>

This boils down to personal preference. I like outshine syntax because it
brings in many more org-like commands (not just visibility cycling). I can
even promote/demote sections, move them up/down, mark/comment whole
sections, etc. Also I can automatically parse a file and auto-generate a
contents section (like this:
https://github.com/kaushalmodi/.emacs.d/blob/3bfb3faa76653c4d36317359f477707bf31c6082/setup-files/setup-editing.el#L4-L42
 )

If all you need is code folding, then outshine is most likely an overkill.

I have experimented with a lot of code folding methods. For pure code
folding, I end up using a hybrid of fold-this (3rd party package),
set-selective-display (inbuilt) and yafolding (3rd party package) wrapped
in my modi/fold-dwim command (config:
https://github.com/kaushalmodi/.emacs.d/blob/master/setup-files/setup-fold.el
 ).

Ignoring all that, the simply thing to try would be to try just the
fold-this package.

-- 

-- 
Kaushal Modi

Re: program outlining

[Robert Thorpe]

Rusi <rustompmody@gmail.com> writes:

> Ive been trying to figure out the best outlining that emacs can give for
> programs.
>
> Outline-mode seems to be more for text than code
> Outshine mode inspired by above+org-mode seemed promising in that it seems to
> make org mode's wonderful TAB-behavior work for code.
> But I couldn’t get it to work
>
> So hideshow…
> But hideshow keystrokes are clumsy

There's a difference between personal code and shared code here.

The outline based modes require additions to the code to be made in the
right way.  Making that work with shared code when other people are
using different editors is difficult.  Even if the other programmers use
Emacs, many Emacs users don't use these modes.  This is not a problem if
it's personal code.

Hide/show, selective display and pages are more general tools.  They
require little or nothing to be embedded in the code itself.  But, in
many cases an automatically generated navigation tree can't beat a
manually created one.

So, there's no one best way.

BR,
Robert Thorpe

Re: program outlining

[Emanuel Berg]

Rusi <rustompmody@gmail.com> writes:

> Ive been trying to figure out the best
> outlining that emacs can give for programs.

"outlining for programs"?

You mean how to jump around all the files -
source, data, Makefile, documentation, and
so on?

-- 
underground experts united .... http://user.it.uu.se/~embe8573
Emacs Gnus Blogomatic ......... http://user.it.uu.se/~embe8573/blogomatic
                   - so far: 56 Blogomatic articles -                   

Re: program outlining

[Rusi]

On Monday, July 11, 2016 at 8:23:38 PM UTC+5:30, Eli Zaretskii wrote:
> > Date: Mon, 11 Jul 2016 05:59:59 -0700 (PDT)
> > From: Rusi 
> > 
> > Ive been trying to figure out the best outlining that emacs can give for
> > programs.
> 
> Did you try selective-display (C-x $)?

Not bad for a start – thanks

Re: program outlining

[Rusi]

On Monday, July 11, 2016 at 8:51:31 PM UTC+5:30, Emanuel Berg wrote:
> Rusi  writes:
> 
> > Ive been trying to figure out the best
> > outlining that emacs can give for programs.
> 
> "outlining for programs"?
> 
> You mean how to jump around all the files -
> source, data, Makefile, documentation, and
> so on?
> 

https://en.wikipedia.org/wiki/Folding_editor
[not claiming its a great reference!]

Re: program outlining

[Emanuel Berg]

Rusi <rustompmody@gmail.com> writes:

> https://en.wikipedia.org/wiki/Folding_editor
> [not claiming its a great reference!]

OK, here is a good reference tho:

    http://en.writecheck.com/6-reasons-to-write-in-your-own-words/

-- 
underground experts united .... http://user.it.uu.se/~embe8573
Emacs Gnus Blogomatic ......... http://user.it.uu.se/~embe8573/blogomatic
                   - so far: 56 Blogomatic articles -                   

Re: program outlining

[Howard Melman]

I use outline-minor-mode in emacs-lisp mode and do:

    (setq outline-regexp ";;;;? \\|(....")

This tracks ;;; and ;;;; comments and also
lines beginning with a ( and four more characters.
Works pretty well. I haven't tried finding values for
outline-regexp in other programming modes.

Then I add:
    
    (define-key outline-minor-mode-map (kbd "C-<tab>") 'org-cycle)
    (define-key outline-minor-mode-map (kbd "S-<tab>") 'org-global-cycle)))

Honestly, outline-mode and outline-minor-mode should
just duplicate the org-cycle commands. 

-- 

Howard

RE: program outlining

[Drew Adams]

> Honestly, outline-mode and outline-minor-mode should
> just duplicate the org-cycle commands.

`M-x report-emacs-bug' for enhancement requests.

(The code could easily substitute Org key bindings whenever
Org has been loaded.  Or you can just continue to do that as
an individual user.)

Re: program outlining

[Rusi]

On Wednesday, July 13, 2016 at 7:14:27 AM UTC+5:30, Howard Melman wrote:
> I use outline-minor-mode in emacs-lisp mode and do:
> 
>     (setq outline-regexp ";;;;? \\|(....")

This would be serious if we could have it mode-specific
eg "///" for C++
"/***" for C which (I guess?) needs to be coded up as "/\\*\\*\\*"
??

Two related threads that unfortunately died:
https://lists.gnu.org/archive/html/emacs-devel/2006-12/msg00232.html
http://comments.gmane.org/gmane.emacs.orgmode/67871
Personally with ASCII being superseded by Unicode I find it strange to have 
a star '*' and that too hardcoded.


> 
> This tracks ;;; and ;;;; comments and also
> lines beginning with a ( and four more characters.
> Works pretty well. I haven't tried finding values for
> outline-regexp in other programming modes.
> 
> Then I add:
>     
>     (define-key outline-minor-mode-map (kbd "C-<tab>") 'org-cycle)
>     (define-key outline-minor-mode-map (kbd "S-<tab>") 'org-global-cycle)))
> 
> Honestly, outline-mode and outline-minor-mode should
> just duplicate the org-cycle commands. 
> 
> -- 
> 
> Howard

Re: program outlining

[Rusi]

On Tuesday, July 12, 2016 at 12:06:11 AM UTC+5:30, Emanuel Berg wrote:
> Rusi  writes:
> 
> > https://en.wikipedia.org/wiki/Folding_editor
> > [not claiming its a great reference!]
> 
> OK, here is a good reference tho:
> 
>     http://en.writecheck.com/6-reasons-to-write-in-your-own-words/

As a matter of fact it was targeted to some notes I was making for my students
on starting to use emacs

Still rough but this is what is…

http://blog.languager.org/2016/07/emacs-tips.html
[search for ‘folding’]

Re: program outlining

[Emanuel Berg]

Rusi <rustompmody@gmail.com> writes:

> As a matter of fact it was targeted to some
> notes I was making for my students on
> starting to use emacs
>
> Still rough but this is what is…
>
> http://blog.languager.org/2016/07/emacs-tips.html
> [search for ‘folding’]

... you mean this? What about it?

    Folding

      * Selective display C-x $ simple and works; not great
      * HideShow improve the keys with suggestions
      * Outshine (badly documented)
      * speedbar; its appearance
      * ECB

-- 
underground experts united .... http://user.it.uu.se/~embe8573
Emacs Gnus Blogomatic ......... http://user.it.uu.se/~embe8573/blogomatic
                   - so far: 57 Blogomatic articles -                   

Re: program outlining

[Howard Melman]

Rusi <rustompmody@gmail.com> writes:

> On Wednesday, July 13, 2016 at 7:14:27 AM UTC+5:30, Howard Melman wrote:
>> I use outline-minor-mode in emacs-lisp mode and do:
>> 
>>     (setq outline-regexp ";;;;? \\|(....")
>
> This would be serious if we could have it mode-specific
> eg "///" for C++
> "/***" for C which (I guess?) needs to be coded up as "/\\*\\*\\*"
> ??

That of course should have been:
     (setq-local outline-regexp ";;;;? \\|(....")

-- 

Howard