306 lines
13 KiB
EmacsLisp
306 lines
13 KiB
EmacsLisp
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;;; anchored-transpose.el --- Transposes a phrase around an anchor phrase
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;; Copyright (C) 2004 Free Software Foundation, Inc.
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;; Author: Rick Bielawski <rbielaws@i1.net>
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;; Keywords: tools convenience
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;; This file is free software; you can redistribute it and/or modify it under
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;; the terms of the GNU General Public License as published by the Free
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;; Software Foundation; either version 2, or (at your option) any later
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;; version.
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;; This file is distributed in the hope that it will be useful, but WITHOUT
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;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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;; more details.
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;;; Commentary:
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;; `anchored-transpose' is an interactive autoload function to transpose
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;; portions of a region around an anchor phrase. In other words it swaps
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;; two regions.
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;;
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;; See C-h f anchored-transpose <ret> for a complete description.
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;;; Installing:
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;; 1) Put anchored-transpose.el on your load path.
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;; 2) Put the following 2 lines in your .emacs
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;; (global-set-key [?\C-x ?t] 'anchored-transpose) ;; Just a suggestion...
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;; (autoload 'anchored-transpose "anchored-transpose" nil t)
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;;; History:
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;; 2004-09-24 RGB Seems useable enough to release.
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;; 2004-10-15 RGB Only comments and doc strings were updated.
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;; 2004-10-22 RGB Added support for 2 phrase selection.
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;; 2004-12-01 RGB Added secondary selection support.
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;; 2005-07-21 RGB Updated help text and comments.
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;; Added support for A C B D and C A D B selection.
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;; Fixed bug affecting multi line selections.
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;; 2005-09-28 RGB Allow swapping regions with no anchor text between.
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;; Changes by Lennart Borgman
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;; 2009-11-25 LB Set and clear secondary selection from keyboard.
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;; Always use secondary selection.
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;; Keep selections right after swapping.
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;; Clear them if not used again.
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;; Swap between buffers.
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;; Check for read-only.
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;; Probably broke something... ;-)
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;;; Code:
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(defvar anchored-transpose-anchor ()
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"begin/end when `anchored-transpose' is in progress else nil")
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;;;###autoload
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(defun anchored-transpose (beg1 end1 flg1 &optional beg2 end2 flg2 win2)
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"Transpose portions of the region around an anchor phrase.
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`this phrase but not that word' can be transposed into
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`that word but not this phrase'
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I want this phrase but not that word.
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|----------------------------|. .This is the entire phrase.
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|-------|. . . . . . .This is the anchor phrase.
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First select the entire phrase and type \\[anchored-transpose].
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This set the secondary selection.
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Then select the anchor phrase and type \\[anchored-transpose]
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again. Alternatively you can do the selections like this:
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I want this phrase but not that word.
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|----------| |---------| Separate phrase selection.
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By default the anchor phrase will automatically include
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any surrounding whitespace even if you don't explicitly select
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it. Also, it won't include certain trailing punctuation. See
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`anchored-transpose-do-fuzzy' for details. A prefix arg prior to
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either selection means `no fuzzy logic, use selections
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literally'.
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You can select the regions to be swapped separately in any
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order.
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After swapping both primary and secondary selection are still
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active. They will be canceled after second next command if you
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do not swap regions again. \(Second because this allow you to
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adjust the regions and try again.)
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You can also swap text between different buffers this way.
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Typing \\[anchored-transpose] with nothing selected clears any
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prior selection, ie secondary selection."
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(interactive `(,(region-beginning) ,(region-end)
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,current-prefix-arg
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,@anchored-transpose-anchor))
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(setq anchored-transpose-anchor nil)
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(when (and mouse-secondary-overlay
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mark-active
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(overlay-buffer mouse-secondary-overlay)
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(/= (overlay-start mouse-secondary-overlay)
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(overlay-end mouse-secondary-overlay)))
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(if (eq (overlay-buffer mouse-secondary-overlay) (current-buffer))
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(progn
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(setq beg2 (overlay-start mouse-secondary-overlay))
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(setq end2 (overlay-end mouse-secondary-overlay))
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(setq flg2 flg1)
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(delete-overlay mouse-secondary-overlay))
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(let* ((sec-buf (overlay-buffer mouse-secondary-overlay))
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(sec-win (get-buffer-window sec-buf))
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(sec-new nil))
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(unless sec-win
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(setq sec-new t)
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(setq sec-win (split-window)))
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(with-selected-window sec-win
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(set-window-buffer (selected-window) sec-buf)
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(goto-char (overlay-start mouse-secondary-overlay)))
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(if (not (y-or-n-p "Swap between buffers "))
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(when sec-new (delete-window sec-win))
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(setq beg2 (overlay-start mouse-secondary-overlay))
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(setq end2 (overlay-end mouse-secondary-overlay))
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(setq flg2 flg1)
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(setq win2 sec-win)))))
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(setq win2 (or win2 (selected-window)))
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(if mark-active
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(if end2 ; then both regions are marked. swap them.
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(if (not (eq win2 (selected-window)))
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(anchored-transpose-swap beg1 end1 beg2 end2 win2)
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(if (and (< beg1 beg2) ;A C B D
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(< end1 end2)
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(> end1 beg2))
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(apply 'anchored-transpose-swap
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(anchored-transpose-do-fuzzy
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beg1 beg2 end1 end2 flg1 flg2 flg1 flg2))
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(if (and (> beg1 beg2) ;C A D B
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(> end1 end2)
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(> end2 beg1))
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(apply 'anchored-transpose-swap
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(anchored-transpose-do-fuzzy
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beg2 beg1 end2 end1 flg2 flg1 flg2 flg1))
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(if (and (< beg1 beg2) ;A C D B
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(> end1 end2))
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(apply 'anchored-transpose-swap
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(anchored-transpose-do-fuzzy
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beg1 beg2 end2 end1 flg1 flg2 flg2 flg1))
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(if (and (> beg1 beg2) ;C A B D
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(< end1 end2))
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(apply 'anchored-transpose-swap
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(anchored-transpose-do-fuzzy
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beg2 beg1 end1 end2 flg2 flg1 flg1 flg2))
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(if (<= end1 beg2) ;A B C D
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(apply 'anchored-transpose-swap
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(anchored-transpose-do-fuzzy
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beg1 end1 beg2 end2 flg1 flg1 flg2 flg2))
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(if (<= end2 beg1) ;C D A B
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(apply 'anchored-transpose-swap
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(anchored-transpose-do-fuzzy
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beg2 end2 beg1 end1 flg2 flg2 flg1 flg1))
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(error "Regions have invalid overlap"))))))))
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;; 1st of 2 regions. Save it and wait for the other.
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;;(setq anchored-transpose-anchor (list beg1 end1 flg1))
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(if (or buffer-read-only
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(get-char-property beg1 'read-only)
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(get-char-property end1 'read-only))
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;; Fix-me: move test, clean up a bit.
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(message "Buffer text is readonly")
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(set-secondary-selection beg1 end1)
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(setq deactivate-mark t)
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(message "%s" (this-command-keys))
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(message (propertize "Transpose: Select second region and call again - (without selection to cancel)"
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'face 'secondary-selection))))
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(if (and mouse-secondary-overlay
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(overlay-buffer mouse-secondary-overlay))
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(progn
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(cancel-secondary-selection)
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(message (propertize "Canceled secondary selection" 'face
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'highlight)))
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(message (propertize "Command requires a marked region" 'face
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'highlight)))))
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;;;###autoload
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(defun set-secondary-selection (beg end)
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"Set the secondary selection to the current region.
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This must be bound to a mouse drag event."
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(interactive "r")
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(move-overlay mouse-secondary-overlay beg end (current-buffer))
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(when (called-interactively-p 'interactive)
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;;(deactivate-mark)
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)
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(x-set-selection
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'SECONDARY
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(buffer-substring (overlay-start mouse-secondary-overlay)
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(overlay-end mouse-secondary-overlay))))
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;;;###autoload
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(defun cancel-secondary-selection ()
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(interactive)
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(delete-overlay mouse-secondary-overlay)
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(x-set-selection 'SECONDARY nil))
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(defun anchored-transpose-do-fuzzy (r1beg r1end r2beg r2end
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lit1 lit2 lit3 lit4)
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"Returns the first 4 arguments after adjusting their value if necessary.
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I want this phrase but not that word.
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|----------------------------|. .This is the entire phrase.
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|-------|. . . . . . .This is the anchor phrase.
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R1BEG R1END R2BEG R2END
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R1BEG and R1END define the first region and R2BEG and R2END the second.
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The flags, LIT1 thru LIT4 indicate if fuzzy logic should be applied to the
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beginning of R1BEG, the end of R1END, the beginning of R2BEG, the end of R2END
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respectively. If any flag is nil then fuzzy logic will be applied. Otherwise
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the value passed should be returned LITerally (that is, unchanged).
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See `anchored-transpose-fuzzy-begin' and `anchored-transpose-fuzzy-end' for
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specifics on what adjustments these routines will make when LITx is nil."
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(list
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(if lit1 r1beg
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(anchored-transpose-fuzzy-begin r1beg r1end "[\t ]+"))
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(if lit2 r1end
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(anchored-transpose-fuzzy-end r1beg r1end "\\s +"))
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(if lit3 r2beg
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(anchored-transpose-fuzzy-begin r2beg r2end "[\t ]+"))
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(if lit4 r2end
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(anchored-transpose-fuzzy-end r2beg r2end "\\s *[.!?]"))
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nil))
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(defun anchored-transpose-fuzzy-end (beg end what)
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"Returns END or new value for END based on the regexp WHAT.
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BEG and END are buffer positions defining a region. If that region ends
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with WHAT then the value for END is adjusted to exclude that matching text.
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NOTE: The regexp is applied differently than `looking-back' applies a regexp.
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Example: if (buffer-string beg end) contains `1234' the regexp `432' matches
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it, not `234' as `looking-back' would. Also, your regexp never sees the char
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at BEG so the match will always leave at least 1 character to transpose.
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The reason for not using looking-back is that it's not greedy enough.
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\(looking-back \" +\") will only match one space no matter how many exist."
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(let ((str (concat
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(reverse (append (buffer-substring (1+ beg) end) nil)))))
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(if (string-match (concat "`" what) str)
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(- end (length (match-string 0 str)))
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end)))
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(defun anchored-transpose-fuzzy-begin (beg end what)
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"Returns BEG or a new value for BEG based on the regexp WHAT.
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BEG and END are buffer positions defining a region. If the region begins
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with WHAT then BEG is adjusted to exclude the matching text.
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NOTE: Your regexp never sees the last char defined by beg/end. This insures
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at least 1 char is always left to transpose."
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(let ((str (buffer-substring beg (1- end))))
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(if (string-match (concat "`" what) str)
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(+ beg (length (match-string 0 str)))
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beg)))
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(defun anchored-transpose-swap (r1beg r1end r2beg r2end win2)
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"Swaps region r1beg/r1end with r2beg/r2end. Flags are currently ignored.
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Point is left at r1end."
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(let ((reg1 (buffer-substring r1beg r1end))
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(reg2 nil)
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(old-buffer (current-buffer)))
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(when win2
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(unless (eq (selected-window) win2)
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(select-window win2)
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(set-buffer (window-buffer (selected-window)))))
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(setq reg2 (delete-and-extract-region r2beg r2end))
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(goto-char r2beg)
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(let ((new-mark (point)))
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(insert reg1)
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(push-mark new-mark))
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;; I want to leave point at the end of phrase 2 in current buffer.
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(save-excursion
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(with-current-buffer old-buffer
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(goto-char r1beg)
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(delete-region r1beg r1end)
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(let ((here (point)))
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(insert reg2)
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(set-secondary-selection here (point)))))
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(setq deactivate-mark nil)
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(when (eq old-buffer (current-buffer))
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(add-hook 'post-command-hook 'anchored-swap-post-command t t))))
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(defun anchored-swap-post-command ()
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(condition-case err
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(unless mark-active
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(cancel-secondary-selection)
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(remove-hook 'post-command-hook 'anchored-swap-post-command t))
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(error (message "anchored-swap-post-command: %s" err))))
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(provide 'anchored-transpose)
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;; Because I like it this way. So there!
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;;; fill-column:78 ***
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;;; emacs-lisp-docstring-fill-column:78 ***
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;;;
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;;; Local Variables: ***
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;;; End: ***
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;;; anchored-transpose.el ends here.
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