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Re: Bookmark the end of file?

From: Marcin Borkowski
Subject: Re: Bookmark the end of file?
Date: Tue, 07 Apr 2015 03:03:15 +0200

On 2015-04-07, at 01:59, Drew Adams <address@hidden> wrote:

>> how to set a bookmark to the end of some file (IOW, (point-max))?  (Of
>> course it is possible with Bookmark+, but is there any UI for that
>> there?  Is it at all possible with vanilla bookmarks?)
>> My use case is a file which I visit (almost) every day to /add/
>> something to its end (e.g., a ledger file).  I can imagine other,
>> similar uses for that, too.
> 1. You can use `bookmark-after-jump-hook' with both vanilla
> `bookmark.el' and Bookmark+.  Add a function that goes to
> `point-max', for instance.
> If you don't want to do that for all bookmarks (which I
> imagine), you can define a command that binds that hook and
> then jumps to a particular bookmark or lets you choose a
> bookmark from some particular set of bookmarks.  IOW, create
> your own `jump-then-goto-eof' command.

Thanks - but not really what I'm after (as you pointed out).  If
I wanted a command, I wouldn't need bookmarks at all.  (Though this is
not an unreasonable thing to use, either.)

> 2. Both vanilla bookmarks and Bookmark+ bookmarks save text
> before and after point, and then use that text to try to
> reposition the location later.  Usually that enables relocation
> correctly.
> But if the location is at eof/eob and you append new text to
> the file then this relocation might fail.


> With Bookmark+, you can bookmark the file and then combine
> that bookmark with a function bookmark that goes to `point-max'.
> That is, create a sequence bookmark of: (1) the bookmark to the
> file followed by (2) a function bookmark that goes to eof.

That was more or less what I was thinking about.  I was just curious
whether Bookmark+ has some UI for that scenario.

> 3. With Bookmark+, you can tag a bookmark with tag "bmkp-jump".
> The function that is the value of a "bmkp-jump" tag is called
> just after standard hook `bookmark-after-jump-hook' is invoked.
> Note that this is a case where the tag is not just a string -
> it is a cons with car "bmkp-jump" and with cdr the extra jump
> function.  IOW, you can use tag "bmkp-jump" to invoke functions
> that are specific to individual bookmarks.  In this way,
> bookmarks can have their own, extra jump behavior.

And this is probably the cleanest solution, and the one which I'm going
to use.


Marcin Borkowski
Faculty of Mathematics and Computer Science
Adam Mickiewicz University

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