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(hide-region-body): Bind

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outline-view-change-hook to nil while making repeated calls to
outline-flag-region.  Run it once at the end.
(hide-other, hide-sublevels, show-children): Likewise.
This commit is contained in:
Dave Love 1998-10-02 14:38:12 +00:00
parent 6480a693a2
commit 4679533511
1 changed files with 68 additions and 56 deletions
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124
lisp/textmodes/outline.el
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@ -496,21 +496,26 @@ Show the heading too, if it is currently invisible."
(defun hide-region-body (start end)
"Hide all body lines in the region, but not headings."
(save-excursion
(save-restriction
(narrow-to-region start end)
(goto-char (point-min))
(if (outline-on-heading-p)
(outline-end-of-heading))
(while (not (eobp))
(outline-flag-region (point)
(progn (outline-next-preface) (point)) t)
(if (not (eobp))
(progn
(forward-char
(if (looking-at "\n\n")
2 1))
(outline-end-of-heading)))))))
;; Nullify the hook to avoid repeated calls to `outline-flag-region'
;; wasting lots of time running `lazy-lock-fontify-after-outline'
;; and run the hook finally.
(let (outline-view-change-hook)
(save-excursion
(save-restriction
(narrow-to-region start end)
(goto-char (point-min))
(if (outline-on-heading-p)
(outline-end-of-heading))
(while (not (eobp))
(outline-flag-region (point)
(progn (outline-next-preface) (point)) t)
(if (not (eobp))
(progn
(forward-char
(if (looking-at "\n\n")
2 1))
(outline-end-of-heading)))))))
(run-hooks 'outline-view-change-hook))
(defun show-all ()
"Show all of the text in the buffer."
@ -540,31 +545,36 @@ Show the heading too, if it is currently invisible."
(if (< levels 1)
(error "Must keep at least one level of headers"))
(setq levels (1- levels))
(save-excursion
(goto-char (point-min))
;; Keep advancing to the next top-level heading.
(while (or (and (bobp) (outline-on-heading-p))
(outline-next-heading))
(let ((end (save-excursion (outline-end-of-subtree) (point))))
;; Hide everything under that.
(outline-flag-region (point) end t)
;; Show the first LEVELS levels under that.
(if (> levels 0)
(show-children levels))
;; Move to the next, since we already found it.
(goto-char end)))))
(let (outline-view-change-hook)
(save-excursion
(goto-char (point-min))
;; Keep advancing to the next top-level heading.
(while (or (and (bobp) (outline-on-heading-p))
(outline-next-heading))
(let ((end (save-excursion (outline-end-of-subtree) (point))))
;; Hide everything under that.
(outline-flag-region (point) end t)
;; Show the first LEVELS levels under that.
(if (> levels 0)
(show-children levels))
;; Move to the next, since we already found it.
(goto-char end)))))
(run-hooks 'outline-view-change-hook))
(defun hide-other ()
"Hide everything except current body and parent and top-level headings."
(interactive)
(hide-sublevels 1)
(save-excursion
(outline-back-to-heading t)
(show-entry)
(while (condition-case nil (progn (outline-up-heading 1) t) (error nil))
(outline-flag-region (1- (point))
(save-excursion (forward-line 1) (point))
nil))))
(let (outline-view-change-hook)
(save-excursion
(outline-back-to-heading t)
(show-entry)
(while (condition-case nil (progn (outline-up-heading 1) t)
(error nil))
(outline-flag-region (1- (point))
(save-excursion (forward-line 1) (point))
nil))))
(run-hooks 'outline-view-change-hook))
(defun outline-flag-subtree (flag)
(save-excursion
@ -610,27 +620,29 @@ Default is enough to cause the following heading to appear."
(if (eobp)
1
(max 1 (- (funcall outline-level) start-level)))))))
(save-excursion
(save-restriction
(outline-back-to-heading)
(setq level (+ level (funcall outline-level)))
(narrow-to-region (point)
(progn (outline-end-of-subtree)
(if (eobp) (point-max) (1+ (point)))))
(goto-char (point-min))
(while (and (not (eobp))
(progn
(outline-next-heading)
(not (eobp))))
(if (<= (funcall outline-level) level)
(save-excursion
(outline-flag-region (save-excursion
(forward-char -1)
(if (bolp)
(forward-char -1))
(point))
(progn (outline-end-of-heading) (point))
nil)))))))
(let (outline-view-change-hook)
(save-excursion
(save-restriction
(outline-back-to-heading)
(setq level (+ level (funcall outline-level)))
(narrow-to-region (point)
(progn (outline-end-of-subtree)
(if (eobp) (point-max) (1+ (point)))))
(goto-char (point-min))
(while (and (not (eobp))
(progn
(outline-next-heading)
(not (eobp))))
(if (<= (funcall outline-level) level)
(save-excursion
(outline-flag-region (save-excursion
(forward-char -1)
(if (bolp)
(forward-char -1))
(point))
(progn (outline-end-of-heading) (point))
nil)))))))
(run-hooks 'outline-view-change-hook))
(defun outline-up-heading (arg)
"Move to the heading line of which the present line is a subheading.