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Fixes to tiny chunk moves.
This commit is contained in:
Andrey Kotlarski
parent
e36492b82f
commit
4f99eaa5e7
119
vlf.el
119
vlf.el
@ -561,9 +561,11 @@ bytes added to the end."
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(setq shift-start (vlf-adjust-start start end position
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adjust-end)
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start (- start shift-start))
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(vlf-insert-content-safe start end position))
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(setq shift-end (vlf-insert-content-safe start end position)
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end (+ end shift-end)))
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(if adjust-end
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(setq shift-end (vlf-adjust-end start end position)))
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(setq shift-end (+ shift-end
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(vlf-adjust-end start end position))))
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(cons shift-start shift-end)))
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(defun vlf-adjust-start (start end position adjust-end)
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@ -571,29 +573,26 @@ bytes added to the end."
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be properly decoded. Use buffer POSITION as start.
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ADJUST-END is non-nil if end would be adjusted later.
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Return number of bytes moved back for proper decoding."
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(let* ((shift 0)
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(min-end (min end (+ start vlf-min-chunk-size)))
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(let* ((min-end (min end (+ start vlf-min-chunk-size)))
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(chunk-size (- min-end start))
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(strict (and (not adjust-end) (= min-end end))))
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(vlf-insert-content-safe start min-end position)
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(shift (vlf-insert-content-safe start min-end position t)))
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(setq start (+ start shift))
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(while (and (not (zerop start))
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(< shift 3)
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(or (= position (point-max))
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(let ((diff (- chunk-size
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(length
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(encode-coding-region
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position (point-max)
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buffer-file-coding-system t)))))
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(and (not (zerop diff))
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(cond (strict t)
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(cond ((not adjust-end) (not (zerop diff)))
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(vlf-partial-decode-shown
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(or (< diff -3) (< 0 diff)))
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(t (or (< diff 0) (< 3 diff))))))))
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(t (or (< diff 0) (< 3 diff))))))
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(setq shift (1+ shift)
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start (1- start)
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chunk-size (1+ chunk-size))
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(delete-region position (point-max))
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(vlf-insert-content-safe start min-end position))
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(insert-file-contents buffer-file-name nil start min-end))
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(unless (= min-end end)
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(delete-region position (point-max))
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(insert-file-contents buffer-file-name nil start end))
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@ -603,93 +602,53 @@ Return number of bytes moved back for proper decoding."
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"Adjust chunk end at absolute START to END till content can be\
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properly decoded starting at POSITION.
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Return number of bytes added for proper decoding."
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(let ((shift 0)
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(new-pos (max position (- (point-max) vlf-min-chunk-size))))
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(let ((shift 0))
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(if vlf-partial-decode-shown
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(let ((new-pos (max position
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(- (point-max) vlf-min-chunk-size))))
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(if (< position new-pos)
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(setq start (+ start (length (encode-coding-region
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position new-pos
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buffer-file-coding-system t)))
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position new-pos))
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(if vlf-partial-decode-shown
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buffer-file-coding-system
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t)))
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position new-pos))))
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(let ((chunk-size (- end start)))
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(goto-char (point-max))
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(while (and (< end vlf-file-size)
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(< shift 3)
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(or (= position (point-max))
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(if vlf-partial-decode-shown
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(eq (char-charset (preceding-char))
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'eight-bit))
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(while (and (< shift 3)
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(< end vlf-file-size)
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(or (eq (char-charset (preceding-char)) 'eight-bit)
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(/= chunk-size
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(length (encode-coding-region
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position (point-max)
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buffer-file-coding-system
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t)))))
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buffer-file-coding-system t)))))
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(setq shift (1+ shift)
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end (1+ end)
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chunk-size (1+ chunk-size))
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(delete-region position (point-max))
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(vlf-insert-content-safe start end position))))
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(insert-file-contents buffer-file-name nil start end)
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(goto-char (point-max))))
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shift))
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(defun vlf-insert-content-safe (start end position)
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(defun vlf-insert-content-safe (start end position &optional shift-start)
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"Insert file content from absolute START to END of file at\
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POSITION. Clean up if no characters are inserted."
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POSITION. Adjust start if SHIFT-START is non nil, end otherwise.
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Clean up if no characters are inserted."
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(goto-char position)
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(let ((tiny (and (not vlf-partial-decode-shown)
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(< (- end start) 4))))
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(if tiny (insert "|"))
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(cond ((zerop (cadr (insert-file-contents buffer-file-name
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(let ((shift 0))
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(while (and (< shift 3)
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(zerop (cadr (insert-file-contents buffer-file-name
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nil start end)))
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(if shift-start
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(not (zerop start))
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(< end vlf-file-size)))
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;; TODO: this seems like regression after Emacs 24.3
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(message "Buffer content may be broken")
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(setq shift (1+ shift))
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(if shift-start
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(setq start (1- start))
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(setq end (1+ end)))
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(delete-region position (point-max)))
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(tiny (delete-region position (1+ position))))))
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(defun vlf-adjust-chunk (start end &optional adjust-start adjust-end
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position)
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"Adjust chunk at absolute START to END till content can be\
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properly decoded. ADJUST-START determines if trying to prepend bytes\
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to the beginning, ADJUST-END - append to the end.
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Use buffer POSITION as start if given.
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Return number of bytes moved back for proper decoding and number of
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bytes added to the end."
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(if position (goto-char position))
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(insert-file-contents buffer-file-name nil start end)
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(let ((shift-start 0)
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(shift-end 0))
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(if adjust-start
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(let ((position (or position (point-min)))
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(chunk-size (- end start)))
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(while (and (not (zerop start))
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(< shift-start 4)
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(< 4 (abs (- chunk-size
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(length (encode-coding-region
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position (point-max)
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buffer-file-coding-system
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t))))))
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(setq shift-start (1+ shift-start)
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start (1- start)
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chunk-size (1+ chunk-size))
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(delete-region position (point-max))
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(goto-char position)
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(insert-file-contents buffer-file-name nil start end))))
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(if adjust-end
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(cond ((vlf-partial-decode-shown-p) ;remove raw bytes from end
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(goto-char (point-max))
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(while (eq (char-charset (preceding-char)) 'eight-bit)
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(setq shift-end (1- shift-end))
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(delete-char -1)))
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((< end vlf-file-size) ;add bytes until new character is displayed
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(let ((position (or position (point-min)))
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(expected-size (buffer-size)))
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(while (and (progn
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(setq shift-end (1+ shift-end)
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end (1+ end))
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(delete-region position (point-max))
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(goto-char position)
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(insert-file-contents buffer-file-name
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nil start end)
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(< end vlf-file-size))
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(= expected-size (buffer-size))))))))
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(cons shift-start shift-end)))
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shift))
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(defun vlf-partial-decode-shown-p ()
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"Determine if partial decode codes are displayed.
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