bookmark position at end of file

bookmark position at end of file

[Uwe Siart]

Hy all,

bookmark-set stores the position in the as well as some surrounding
context. This is perfect if one wants to return to exactly that
position. But is it also possible to set bookmark position to point-max
independent of what the context is?

Use case: When I visit a bookmarked log file where data is appended
constantly I would like to end up at the end of the file to see the most
recent entry.

-- 
Uwe

RE: bookmark position at end of file

[Drew Adams]

> bookmark-set stores the position in the as well as some surrounding
> context. This is perfect if one wants to return to exactly that
> position. But is it also possible to set bookmark position to 
> point-max independent of what the context is?
> 
> Use case: When I visit a bookmarked log file where data is appended
> constantly I would like to end up at the end of the file to 
> see the most recent entry.

1. The easiest way is just to use `bookmark-after-jump-hook'. Add a function to
this hook that goes to the end of the buffer if the buffer is a log. Example:

(add-hook 'bookmark-after-jump-hook 'foo)
(defun foo ()
  (when (string= "log" (file-name-extension (buffer-file-name)))
    (end-of-buffer)))


2. Alternatively, you can define your own bookmark type, in this case a log-file
type, by defining a handler for log files. There are two pieces:

2a. Add `(handler . log-bookmark-jump)' to bookmarks in log files. You do this
by setting variable `bookmark-make-record-function' in your mode (log mode,
which you'll presumably define) to a function that creates the bookmark the way
you want it.

(set (make-local-variable 'bookmark-make-record-function)
       'log-mode-bookmark-make-record)

2b. Define `log-bookmark-jump' to do what you want.

See `Info-bookmark-make-record' and `Info-bookmark-jump' for examples.

Re: bookmark position at end of file

[Uwe Siart]

"Drew Adams" <drew.adams@oracle.com> writes:

> [possible solutions]

Many thanks for your suggestions. This sounds all very promising. I'll
try it out.

-- 
Uwe