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Implement next-error and previous-error functionality for sparse trees

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* lisp/org.el (org-occur-next-match): New function.
(org-mode): Set the variable `next-error-function'.
(org-highlight-new-match): Add an `org-type' property to the overlays.
* doc/org.texi (Sparse trees): Document the next-error / previous-error
functionality.

After a sparse tree construction, `M-g n' and `M-g p' will now jump to
the location of matches.
This commit is contained in:
Carsten Dominik 2011-01-06 11:30:30 +01:00
parent 08755d7aa9
commit dd23461349
2 changed files with 34 additions and 0 deletions
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5
doc/org.texi
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@ -1429,8 +1429,13 @@ editing command@footnote{This depends on the option
@code{org-remove-highlights-with-change}}, or by pressing @kbd{C-c C-c}.
When called with a @kbd{C-u} prefix argument, previous highlights are kept,
so several calls to this command can be stacked.
@orgcmdkkc{M-g n,M-g M-n,next-error}
Jump to the next sparse tree match in this buffer.
@orgcmdkkc{M-g p,M-g M-p,previous-error}
Jump to the previous sparse tree match in this buffer.
@end table
@noindent
@vindex org-agenda-custom-commands
For frequently used sparse trees of specific search strings, you can

29
lisp/org.el
View file

@ -4720,6 +4720,8 @@ The following commands are available:
;; Beginning/end of defun
(org-set-local 'beginning-of-defun-function 'org-beginning-of-defun)
(org-set-local 'end-of-defun-function 'org-end-of-defun)
;; Next error for sparse trees
(org-set-local 'next-error-function 'org-occur-next-match)
;; Make sure dependence stuff works reliably, even for users who set it
;; too late :-(
(if org-enforce-todo-dependencies
@ -11981,6 +11983,32 @@ that the match should indeed be shown."
(message "%d match(es) for regexp %s" cnt regexp))
cnt))
(defun org-occur-next-match (&optional n reset)
"Function for `next-error-function' to find sparse tree matches.
N is the number of matches to move, when negative move backwards.
RESET is entirely ignored - this function always goes back to the
starting point when no match is found."
(let* ((limit (if (< n 0) (point-min) (point-max)))
(search-func (if (< n 0)
'previous-single-char-property-change
'next-single-char-property-change))
(n (abs n))
(pos (point))
p1)
(catch 'exit
(while (setq p1 (funcall search-func (point) 'org-type))
(when (equal p1 limit)
(goto-char pos)
(error "No more matches"))
(when (equal (get-char-property p1 'org-type) 'org-occur)
(setq n (1- n))
(when (= n 0)
(goto-char p1)
(throw 'exit (point))))
(goto-char p1))
(goto-char p1)
(error "No more matches"))))
(defun org-show-context (&optional key)
"Make sure point and context are visible.
How much context is shown depends upon the variables
@ -12044,6 +12072,7 @@ entire tree."
"Highlight from BEG to END and mark the highlight is an occur headline."
(let ((ov (make-overlay beg end)))
(overlay-put ov 'face 'secondary-selection)
(overlay-put ov 'org-type 'org-occur)
(push ov org-occur-highlights)))
(defun org-remove-occur-highlights (&optional beg end noremove)