diff options
Diffstat (limited to 'modules/jumper.el')
| -rw-r--r-- | modules/jumper.el | 73 |
1 files changed, 41 insertions, 32 deletions
diff --git a/modules/jumper.el b/modules/jumper.el index 8941d5087..de270de66 100644 --- a/modules/jumper.el +++ b/modules/jumper.el @@ -106,20 +106,29 @@ Note that using M-SPC will override the default binding to just-one-space.") (line-number-at-pos) (current-column))) +(defun jumper--with-marker-at (index fn) + "Call FN with point at the marker stored for register INDEX. +Resolve register INDEX's marker; when it is a live marker, run FN in that +marker's buffer with point at the marker (within `save-current-buffer' and +`save-excursion') and return FN's value. Return nil when INDEX has no valid +marker." + (let* ((reg (aref jumper--registers index)) + (marker (get-register reg))) + (when (and marker (markerp marker)) + (save-current-buffer + (set-buffer (marker-buffer marker)) + (save-excursion + (goto-char marker) + (funcall fn)))))) + (defun jumper--location-exists-p () "Check if current location is already stored." (let ((key (jumper--location-key)) - (found nil)) - (dotimes (i jumper--next-index found) - (let* ((reg (aref jumper--registers i)) - (marker (get-register reg))) - (when (and marker (markerp marker)) - (save-current-buffer - (set-buffer (marker-buffer marker)) - (save-excursion - (goto-char marker) - (when (string= key (jumper--location-key)) - (setq found t))))))))) + (found nil)) + (dotimes (i jumper--next-index found) + (when (jumper--with-marker-at + i (lambda () (string= key (jumper--location-key)))) + (setq found t))))) (defun jumper--register-available-p () "Check if there are registers available." @@ -127,21 +136,25 @@ Note that using M-SPC will override the default binding to just-one-space.") (defun jumper--format-location (index) "Format location at INDEX for display." - (let* ((reg (aref jumper--registers index)) - (marker (get-register reg))) - (when (and marker (markerp marker)) - (save-current-buffer - (set-buffer (marker-buffer marker)) - (save-excursion - (goto-char marker) - (format "[%d] %s:%d - %s" - index - (buffer-name) - (line-number-at-pos) - (buffer-substring-no-properties - (line-beginning-position) - (min (+ (line-beginning-position) 40) - (line-end-position))))))))) + (jumper--with-marker-at + index + (lambda () + (format "[%d] %s:%d - %s" + index + (buffer-name) + (line-number-at-pos) + (buffer-substring-no-properties + (line-beginning-position) + (min (+ (line-beginning-position) 40) + (line-end-position))))))) + +(defun jumper--location-candidates () + "Return an alist of (DISPLAY . INDEX) for all stored locations. +Indices whose marker is no longer valid are skipped (their +`jumper--format-location' returns nil)." + (cl-loop for i from 0 below jumper--next-index + for fmt = (jumper--format-location i) + when fmt collect (cons fmt i))) (defun jumper--do-store-location () "Store current location in the next free register. @@ -208,9 +221,7 @@ Returns: \\='no-locations if no locations stored, ;; Multiple locations - prompt user (t (let* ((locations - (cl-loop for i from 0 below jumper--next-index - for fmt = (jumper--format-location i) - when fmt collect (cons fmt i))) + (jumper--location-candidates)) ;; Add last location if available (last-pos (get-register jumper--last-location-register)) (locations (if last-pos @@ -248,9 +259,7 @@ Returns: \\='no-locations if no locations stored, (if (= jumper--next-index 0) (message "No locations stored") (let* ((locations - (cl-loop for i from 0 below jumper--next-index - for fmt = (jumper--format-location i) - when fmt collect (cons fmt i))) + (jumper--location-candidates)) (locations (cons (cons "Cancel" -1) locations)) (choice (completing-read "Remove location: " locations nil t)) (idx (cdr (assoc choice locations)))) |