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Add procedure to insert strictly batch sized chunk (if possible).

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Andrey Kotlarski 2013-04-01 03:08:14 +03:00
parent 748fd1406e
commit 090cebc2ab
1 changed files with 17 additions and 0 deletions
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17
vlfi.el
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@ -164,6 +164,23 @@ When prefix argument is negative
(set-buffer-modified-p nil)
(vlfi-update-buffer-name))
(defun vlfi-move-to-batch (start)
"Move to batch determined by START.
Adjust according to file start/end and show `vlfi-batch-size' bytes."
(setq vlfi-start-pos (max 0 start)
vlfi-end-pos (+ vlfi-start-pos vlfi-batch-size))
(if (< vlfi-file-size vlfi-end-pos) ; re-check file size
(setq vlfi-file-size
(nth 7 (file-attributes buffer-file-name))
vlfi-end-pos (min vlfi-end-pos vlfi-file-size)
vlfi-start-pos (max 0 (- vlfi-end-pos vlfi-batch-size))))
(let ((inhibit-read-only t))
(erase-buffer)
(insert-file-contents buffer-file-name nil
vlfi-start-pos vlfi-end-pos))
(set-buffer-modified-p nil)
(vlfi-update-buffer-name))
(defun vlfi-move-to-chunk (start end)
"Move to chunk determined by START END."
(if (< vlfi-file-size end) ; re-check file size