diff options
Diffstat (limited to 'lisp/emacs-lisp/easy-mmode.el')
| -rw-r--r-- | lisp/emacs-lisp/easy-mmode.el | 97 |
1 files changed, 60 insertions, 37 deletions
diff --git a/lisp/emacs-lisp/easy-mmode.el b/lisp/emacs-lisp/easy-mmode.el index f53db48f0b7..35f291dd1a7 100644 --- a/lisp/emacs-lisp/easy-mmode.el +++ b/lisp/emacs-lisp/easy-mmode.el @@ -763,6 +763,59 @@ CSS contains a list of syntax specifications of the form (CHAR . SYNTAX)." ;;; easy-mmode-define-navigation ;;; +(defun easy-mmode--prev (re name count &optional endfun narrowfun) + "Go to the COUNT'th previous occurrence of RE. + +If none, error with NAME. + +ENDFUN and NARROWFUN are treated like in `easy-mmode-define-navigation'." + (unless count (setq count 1)) + (if (< count 0) (easy-mmode--next re name (- count) endfun narrowfun) + (let ((re-narrow (and narrowfun (prog1 (buffer-narrowed-p) (widen))))) + ;; If point is inside a match for RE, move to its beginning like + ;; `backward-sexp' and other movement commands. + (when (and (not (zerop count)) + (save-excursion + ;; Make sure we're out of the current match if any. + (goto-char (if (re-search-backward re nil t 1) + (match-end 0) (point-min))) + (re-search-forward re nil t 1)) + (< (match-beginning 0) (point) (match-end 0))) + (goto-char (match-beginning 0)) + (setq count (1- count))) + (unless (re-search-backward re nil t count) + (user-error "No previous %s" name)) + (when re-narrow (funcall narrowfun))))) + +(defun easy-mmode--next (re name count &optional endfun narrowfun) + "Go to the next COUNT'th occurrence of RE. + +If none, error with NAME. + +ENDFUN and NARROWFUN are treated like in `easy-mmode-define-navigation'." + (unless count (setq count 1)) + (if (< count 0) (easy-mmode--prev re name (- count) endfun narrowfun) + (if (looking-at re) (setq count (1+ count))) + (let ((re-narrow (and narrowfun (prog1 (buffer-narrowed-p) (widen))))) + (if (not (re-search-forward re nil t count)) + (if (looking-at re) + (goto-char (or (if endfun (funcall endfun)) (point-max))) + (user-error "No next %s" name)) + (goto-char (match-beginning 0)) + (when (and (eq (current-buffer) (window-buffer)) + (called-interactively-p 'interactive)) + (let ((endpt (or (save-excursion + (if endfun (funcall endfun) + (re-search-forward re nil t 2))) + (point-max)))) + (unless (pos-visible-in-window-p endpt nil t) + (let ((ws (window-start))) + (recenter '(0)) + (if (< (window-start) ws) + ;; recenter scrolled in the wrong direction! + (set-window-start nil ws))))))) + (when re-narrow (funcall narrowfun))))) + (defmacro easy-mmode-define-navigation (base re &optional name endfun narrowfun &rest body) "Define BASE-next and BASE-prev to navigate in the buffer. @@ -780,53 +833,23 @@ BODY is executed after moving to the destination location." (let* ((base-name (symbol-name base)) (prev-sym (intern (concat base-name "-prev"))) (next-sym (intern (concat base-name "-next"))) - (when-narrowed - (lambda (body) - (if (null narrowfun) body - `(let ((was-narrowed (prog1 (buffer-narrowed-p) (widen)))) - ,body - (when was-narrowed (funcall #',narrowfun))))))) + (endfun (when endfun `#',endfun)) + (narrowfun (when narrowfun `#',narrowfun))) (unless name (setq name base-name)) - ;; FIXME: Move most of those functions's bodies to helper functions! `(progn (defun ,next-sym (&optional count) ,(format "Go to the next COUNT'th %s. Interactively, COUNT is the prefix numeric argument, and defaults to 1." name) (interactive "p") - (unless count (setq count 1)) - (if (< count 0) (,prev-sym (- count)) - (if (looking-at ,re) (setq count (1+ count))) - ,(funcall when-narrowed - `(if (not (re-search-forward ,re nil t count)) - (if (looking-at ,re) - (goto-char (or ,(if endfun `(funcall #',endfun)) (point-max))) - (user-error "No next %s" ,name)) - (goto-char (match-beginning 0)) - (when (and (eq (current-buffer) (window-buffer)) - (called-interactively-p 'interactive)) - (let ((endpt (or (save-excursion - ,(if endfun `(funcall #',endfun) - `(re-search-forward ,re nil t 2))) - (point-max)))) - (unless (pos-visible-in-window-p endpt nil t) - (let ((ws (window-start))) - (recenter '(0)) - (if (< (window-start) ws) - ;; recenter scrolled in the wrong direction! - (set-window-start nil ws)))))))) - ,@body)) + (easy-mmode--next ,re ,name count ,endfun ,narrowfun) + ,@body) (put ',next-sym 'definition-name ',base) (defun ,prev-sym (&optional count) ,(format "Go to the previous COUNT'th %s. -Interactively, COUNT is the prefix numeric argument, and defaults to 1." - (or name base-name)) +Interactively, COUNT is the prefix numeric argument, and defaults to 1." name) (interactive "p") - (unless count (setq count 1)) - (if (< count 0) (,next-sym (- count)) - ,(funcall when-narrowed - `(unless (re-search-backward ,re nil t count) - (user-error "No previous %s" ,name))) - ,@body)) + (easy-mmode--prev ,re ,name count ,endfun ,narrowfun) + ,@body) (put ',prev-sym 'definition-name ',base)))) ;; When deleting these two, also delete them from loaddefs-gen.el. |