Line numbers with org-store-link?

Line numbers with org-store-link?

[Bart Parliman]

Is there a way to force org-store-link to store the current line 
number rather than a string to locate?

When preparing for code reviews I like to create notes with links 
to the exact source line.  FWIW, in these cases, I keep a static 
copy of the code so I know it isn't going to change.

Obviously none of those reviews involve lisp, since my first 
feeble attempt to add a hyperlink type never even came close to 
running. :-)

Thanks for any help,
Bart

Re: Line numbers with org-store-link?

[Carsten Dominik]

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Hi Bart,

No, this does not exist, because normally line numbers are moving  
around and therefore are not very useful as long-term search targets.

You can pretty easily hack this, though:

Lets say you want to have line numbers for links to any files in c- 
mode (because this is the programming language you are talking  
about).  Limiting it to some special files makes sure that in other  
file types you will still get links based on (somewhat) more reliable  
text snippets.

Then you can write a small function and add it to the hook
org-create-file-search-functions:

   (defun my-link-to-line-number-in-c-mode ()
     "When in c-mode, use line number as search item."
     (when (eq major-mode 'c-mode)
       (number-to-string (org-current-line))))

   (add-hook 'org-create-file-search-functions
             'my-link-to-line-number-in-c-mode)

Normally you would also have to write a function to search for the  
custom link search text and add that function to `org-execute-file- 
search-functions'.  But you are lucky:  if the search item is an  
integer number, Org already interprets it as a line number.

Hope this helps.

- Carsten

On May 5, 2008, at 11:40 PM, Bart Parliman wrote:
> Is there a way to force org-store-link to store the current line  
> number rather than a string to locate?
>
> When preparing for code reviews I like to create notes with links to  
> the exact source line.  FWIW, in these cases, I keep a static copy  
> of the code so I know it isn't going to change.
>
> Obviously none of those reviews involve lisp, since my first feeble  
> attempt to add a hyperlink type never even came close to running. :-)
>
> Thanks for any help,
> Bart
>
>
>
> _______________________________________________
> Emacs-orgmode mailing list
> Remember: use `Reply All' to send replies to the list.
> Emacs-orgmode@gnu.org
> http://lists.gnu.org/mailman/listinfo/emacs-orgmode


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Re: Line numbers with org-store-link?

[Bart Parliman]

Carsten,

This is exactly what I need.  Thanks.

Bart

On Tue, 6 May 2008, Carsten Dominik wrote:

> Hi Bart,
>
> No, this does not exist, because normally line numbers are moving around and 
> therefore are not very useful as long-term search targets.
>
> You can pretty easily hack this, though:
>
> Lets say you want to have line numbers for links to any files in c-mode 
> (because this is the programming language you are talking about).  Limiting 
> it to some special files makes sure that in other file types you will still 
> get links based on (somewhat) more reliable text snippets.
>
> Then you can write a small function and add it to the hook
> org-create-file-search-functions:
>
> (defun my-link-to-line-number-in-c-mode ()
>   "When in c-mode, use line number as search item."
>   (when (eq major-mode 'c-mode)
>     (number-to-string (org-current-line))))
>
> (add-hook 'org-create-file-search-functions
>           'my-link-to-line-number-in-c-mode)
>
> Normally you would also have to write a function to search for the custom 
> link search text and add that function to 
> `org-execute-file-search-functions'.  But you are lucky:  if the search item 
> is an integer number, Org already interprets it as a line number.
>
> Hope this helps.
>
> - Carsten
>
> On May 5, 2008, at 11:40 PM, Bart Parliman wrote:
>> Is there a way to force org-store-link to store the current line number 
>> rather than a string to locate?
>> 
>> When preparing for code reviews I like to create notes with links to the 
>> exact source line.  FWIW, in these cases, I keep a static copy of the code 
>> so I know it isn't going to change.
>> 
>> Obviously none of those reviews involve lisp, since my first feeble attempt 
>> to add a hyperlink type never even came close to running. :-)
>> 
>> Thanks for any help,
>> Bart
>> 
>> 
>> 
>> _______________________________________________
>> Emacs-orgmode mailing list
>> Remember: use `Reply All' to send replies to the list.
>> Emacs-orgmode@gnu.org
>> http://lists.gnu.org/mailman/listinfo/emacs-orgmode
>