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Play nicely with hexl-mode.

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Andrey Kotlarski 2014-02-14 02:49:02 +02:00
parent b05255b225
commit 074f9e960d
1 changed files with 78 additions and 32 deletions
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68
vlf.el
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@ -2,7 +2,7 @@
;; Copyright (C) 2006, 2012-2014 Free Software Foundation, Inc.
;; Version: 1.4
;; Version: 1.5
;; Keywords: large files, utilities
;; Maintainer: Andrey Kotlarski <m00naticus@gmail.com>
;; Authors: 2006 Mathias Dahl <mathias.dahl@gmail.com>
@ -98,11 +98,8 @@ values are: `write', `ediff', `occur', `search', `goto-line'."
(define-minor-mode vlf-mode
"Mode to browse large files in."
:lighter " VLF"
:group 'vlf
:keymap vlf-prefix-map
(if vlf-mode
(progn
:lighter " VLF" :group 'vlf :keymap vlf-prefix-map
(cond (vlf-mode
(set (make-local-variable 'require-final-newline) nil)
(add-hook 'write-file-functions 'vlf-write nil t)
(set (make-local-variable 'revert-buffer-function)
@ -114,21 +111,35 @@ values are: `write', `ediff', `occur', `search', `goto-line'."
(let* ((pos (position-bytes (point)))
(start (* (/ pos vlf-batch-size) vlf-batch-size)))
(goto-char (byte-to-position (- pos start)))
(vlf-move-to-batch start)))
(kill-local-variable 'revert-buffer-function)
(vlf-stop-follow)
(when (or (not large-file-warning-threshold)
(vlf-move-to-batch start))
(add-hook 'after-change-major-mode-hook 'vlf-keep-alive t t)
(vlf-keep-alive))
((or (not large-file-warning-threshold)
(< vlf-file-size large-file-warning-threshold)
(y-or-n-p (format "Load whole file (%s)? "
(file-size-human-readable
vlf-file-size))))
(kill-local-variable 'revert-buffer-function)
(vlf-stop-follow)
(kill-local-variable 'require-final-newline)
(remove-hook 'write-file-functions 'vlf-write t)
(remove-hook 'after-change-major-mode-hook
'vlf-keep-alive t)
(let ((hexl (eq major-mode 'hexl-mode)))
(if hexl (hexl-mode-exit))
(let ((pos (+ vlf-start-pos (position-bytes (point)))))
(vlf-with-undo-disabled
(insert-file-contents buffer-file-name t nil nil t))
(goto-char (byte-to-position pos)))
(rename-buffer (file-name-nondirectory buffer-file-name) t))))
(if hexl (hexl-mode)))
(rename-buffer (file-name-nondirectory buffer-file-name) t))
(t (setq vlf-mode t))))
(defun vlf-keep-alive ()
"Keep `vlf-mode' on major mode change."
(if (eq major-mode 'hexl-mode)
(remove-hook 'write-contents-functions 'hexl-save-buffer t))
(setq vlf-mode t))
;;;###autoload
(defun vlf (file)
@ -192,6 +203,41 @@ When prefix argument is negative
(goto-char (point-max)))
ad-do-it))
;; hexl mode integration
(defun vlf-hexl-before (&optional operation)
"Temporarily disable `hexl-mode' for OPERATION."
(when (eq major-mode 'hexl-mode)
(hexl-mode-exit)
(set (make-local-variable 'vlf-restore-hexl-mode) operation)))
(defun vlf-hexl-after (&optional operation)
"Re-enable `hexl-mode' if active before OPERATION."
(when (and (boundp 'vlf-restore-hexl-mode)
(eq vlf-restore-hexl-mode operation))
(hexl-mode)
(kill-local-variable 'vlf-restore-hexl-mode)))
(add-hook 'vlf-before-batch-functions 'vlf-hexl-before)
(add-hook 'vlf-after-batch-functions 'vlf-hexl-after)
(add-hook 'vlf-before-chunk-update 'vlf-hexl-before)
(add-hook 'vlf-after-chunk-update 'vlf-hexl-after)
(defadvice hexl-scroll-up (around vlf-scroll-up
activate compile)
"Slide to next batch if at end of buffer in `vlf-mode'."
(if (and vlf-mode (pos-visible-in-window-p (point-max)))
(progn (vlf-next-batch 1)
(goto-char (point-min)))
ad-do-it))
(defadvice hexl-scroll-down (around vlf-scroll-down
activate compile)
"Slide to previous batch if at beginning of buffer in `vlf-mode'."
(if (and vlf-mode (pos-visible-in-window-p (point-min)))
(progn (vlf-prev-batch 1)
(goto-char (point-max)))
ad-do-it))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; utilities