Re: Specify page number in hyperlink [to pdf]

[Joe Riel <joer@san.rr.com>]

Nick Dokos wrote:
> Joe Riel <joer@san.rr.com> wrote:
>
>   
>> Jan Böcker wrote:
>>     
>>> On 28.04.2010 20:30, Joe Riel wrote:
>>>   
>>>       
>>>> The hyperlink syntax allows specifying a line number, however,
>>>> that doesn't do anything (other than force the document to
>>>> be opened inside of emacs) with a non-text file (say a pdf).
>>>>
>>>> Is therea an extension to allow specifying a page number
>>>> so that a link to a pdf is opened at the specified page?
>>>>     
>>>>         
>>> There is in the current git version, its not yet documented though.
>>>
>>>
>>> Add an entry to the variable org-file-apps like this:
>>> ("\\.pdf::\\([0-9]+\\)\\'" . "evince \"%s\" -p %1")
>>>
>>> Or as seen in the customize interface:
>>> Extension: \.pdf::\([0-9]+\)\'
>>> Command:   evince "%s" -p %1
>>>
>>> The subexpression \([0-9]+\) in the regex captures the page number,
>>> which replaces the %1 in the command string. (This example assumes you
>>> want to open your PDFs with evince, which accepts a page number after
>>> the -p option.)
>>>
>>> You can then reference a specific page of a PDF like this:
>>> [[file:/path/to/document.pdf::42]]
>>>
>>> I had planned to document this yesterday, but unfortunately spent the
>>> better part of the day recovering from a cold. I will send a patch
>>> describing how this works, when exactly the new behaviour kicks in and
>>> the implications for backwards compatibility as soon as I find time to
>>> describe it compactly enough to fit into the docstring.
>>>
>>> HTH, Jan
>>>   
>>>       
>> A related question; can this extension be used with link abbreviations?
>>
>> I tried
>>
>> #+LINK: sample file:/home/joe/sample.pdf
>>
>> with
>>
>> [[sample::3]]
>>
>> but that does not work.
> This happens in org-link-expand-abbrev: it splits sample::3 into
> "sample" and "3", looks up "sample" in org-link-abbrev-alist and
> performs the replacement, then returns the concatenation of that with
> the "3" part, thereby eliminating the "::" marker that would trigger the
> further processing necessary to open the pdf file at the given page.
>
> You could try
>
> #+LINK: sample file:/home/joe/sample.pdf::%s
>
> This will work with the [[sample::3]] link, but not with [[sample]].
>   
That is fine, though I'll apply the patch.  There does appear to
be another bug, or my misunderstanding.  That is, even
without the link,

  [[file:/home/joe/sample.pdf]]

does not work properly.  That is, clicking on it (mouse 1)
opens the pdf inside emacs rather than in a standalone pdf reader.  
Previously
that wasn't the case (if memory serves).  Using

  [[file:/home/joe/sample.pdf::1]]

for the link opens it in a standalone reader.


Joe