Re: [Orgmode] RFC: Syntax for page numbers in file: links?
On 06.01.2010 10:05, Carsten Dominik wrote: Would you like to work on a patch that allows interpreting page numbers for external applications? I'll definitely take a stab at it and see how far I get while learning more about elisp along the way. I will post to the mailing list if I make significant progress or give up. - Jan ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
Re: [Orgmode] RFC: Syntax for page numbers in file: links?
On Jan 6, 2010, at 12:07 PM, Jan Böcker wrote: On 06.01.2010 10:05, Carsten Dominik wrote: Would you like to work on a patch that allows interpreting page numbers for external applications? I'll definitely take a stab at it and see how far I get while learning more about elisp along the way. I will post to the mailing list if I make significant progress or give up. Thanks! - Carsten ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
Re: [Orgmode] RFC: Syntax for page numbers in file: links?
Hi, during following this thread I noticed one problem with the page and line- number concept - file:~/some-file.txt::23some-file.txt, line 23 A txt-file may have no clear page boarders. Thus only a line number might make sens - file:~/document.pdf:4 document.pdf, page 4 A PDF may have only pages and maybe (I do not know at the moment) there is a way to address bookmarks and toc entries and even line numbers - file:~/document.odf:3::5document.odf, page 3, line 5 A odf can have both line numbers and page numbers as well as chapters-, paragraphs- etc. markers. Thus, it depends heavily on the kind of document and on the ability of the external reader. I would suggest to make sure, if no page number but a line number is given, this line number should be dealt as absolute value (starting from the very first line). If a page number and a line number is given, the line number is relative to the given page. Furthermore, there should be something to deal with wrong inputs. E.g. given page number for file-types which does not have defined pages (like txt, source code, etc.). Nice would be the possibility to refer to TOC, paragraphs and other markers since they would keep valid even if later versions of the file change the position and make page and line number invalid. Just my thoughts Torsten ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
Re: [Orgmode] RFC: Syntax for page numbers in file: links?
I am not sure if it makes sense to handle more that a page number, really. I have thought about this again and concluded that the approach in my first post is, indeed, over-engineered. I also believe the approach proposed in this post to be flexible enough to handle some extensions. On 05.01.2010 13:32, Carsten Dominik wrote: I have yesterday implemented modifies for file link: file+sys: now forces opening a file with the system's open command file+emacs: forces opening in Emacs. I guess it would make sense to make more of these, so that one could select a specific viewer for selected files, what do you think? The method of opening a file should not be specified in the link itself, unless it makes sense to change it for an individual link. Imagine two users exchanging org files, where one likes to open PDFs with evince and the other prefers doc-view-mode. However, this would be useful for links to file types which org-mode does not know anything about; the user would not have to tell org-mode about them by modifying org-file-apps first. Maybe this should not force the opening method, but provide the default if org-file-apps has nothing to say? - org-file-apps should allow to specify how to pass a page number to an external program. Unlike the file name, this is an optional argument, as a link may not specify a page number at all. I do not know how to do this in an elegant way, maybe let the user specify multiple entries - one for links with a page number, one for links without. This is not easy at all, but I am sure it can be done. org-file-apps already allows matching regular expressions against the file name. I propose the following changes: - match the regular expressions against the whole link - if the matching regex used grouping, in addition to replacing %s with the file name in a command string, replace %1 with the first match, %2 with the second, etc. - if the org-file-apps entry specifies a lisp form to be evaluated, make the group matches available to the lisp form being evaluated. - org-docview.el would only handle org-store-link functionality and generate links such as file:path::page. With these changes, the following sample entries in org-file-apps could then specify the method of how to open links to PDF files with and without page number specifications. Open PDFs in evince: regex: \.pdf\' command:evince %s regex: \.pdf::\(\d+\)\' command:evince %s -p %1 Open PDFs in doc-view-mode: regex: \.pdf\' visit in emacs regex: \.pdf::\(\d+\)\' lisp form: (progn (org-open-file file 1) (docview-goto-page (match-string 1 link))) The lisp form in the last entry could go into org-docview.el as a convenience function. We would also need a way for org-docview.el to supply default entries for org-file-apps, maybe a variable org-file-apps-defaults-alist or something. AFAIK, this approach would be backwards-compatible with current org-file-apps entries, which typically match an extension at the end of the string and specify a command to open the file with, which gets passed the file name via %s. If the link specifies arguments, the current entries would no longer match, but they cannot handle arguments anyway. ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
Re: [Orgmode] RFC: Syntax for page numbers in file: links?
If you need the syntax to be more general, take a look at extensible syntax on this list. -- Q: How many CDC scientists does it take to change a lightbulb? A: You only think it's dark. [CDC has denied ME/CFS for 25 years] = Retrovirus: http://www.wpinstitute.org/xmrv/xmrv_qa.html ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
