275 lines
7.9 KiB
EmacsLisp
275 lines
7.9 KiB
EmacsLisp
;;; delim-col.el --- Prettify all columns in a region or rectangle.
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;; Copyright (C) 1999 Free Software Foundation, Inc.
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;; Author: Vinicius Jose Latorre <vinicius@cpqd.com.br>
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;; Maintainer: Vinicius Jose Latorre <vinicius@cpqd.com.br>
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;; Time-stamp: <99/08/21 19:51:13 vinicius>
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;; Version: 1.3
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;; Keywords: internal
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; delim-col helps to prettify columns in a text region or rectangle.
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;;
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;; To use it, make sure that this file is in load-path and insert in your
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;; .emacs:
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;;
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;; (require 'delim-col)
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;;
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;; If you have, for example, the following columns:
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;;
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;; a b c d
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;; aaaa bb ccc ddddd
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;; aaa bbb cccc dddd
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;; aa bb ccccccc ddd
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;;
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;; And the following settings:
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;;
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;; (setq delimit-columns-str-before "[ ")
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;; (setq delimit-columns-str-after " ]")
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;; (setq delimit-columns-str-separator ", ")
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;; (setq delimit-columns-separator "\t")
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;;
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;; If you select the lines above and type:
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;;
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;; M-x delimit-columns-region RET
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;;
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;; You obtain the following result:
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;;
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;; [ a , b , c , d ]
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;; [ aaaa, bb , ccc , ddddd ]
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;; [ aaa , bbb, cccc , dddd ]
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;; [ aa , bb , ccccccc, ddd ]
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;;
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;; But if you select start from the very first b and the very last c and type:
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;;
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;; M-x delimit-columns-rectangle RET
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;;
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;; You obtain the following result:
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;;
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;; a [ b , c ] d
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;; aaaa [ bb , ccc ] ddddd
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;; aaa [ bbb, cccc ] dddd
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;; aa [ bb , ccccccc ] ddd
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;;
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;; Note that `delimit-columns-region' operates over all text region
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;; selected, extending the region start to the beginning of line and the
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;; region end to the end of line. While `delimit-columns-rectangle'
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;; operates over the text rectangle selected which rectangle diagonal is
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;; given by the region start and end.
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;;
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;; `delimit-columns-region' is useful when you have columns of text that
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;; are not well aligned, like:
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;;
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;; horse apple bus
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;; dog pineapple car
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;; porcupine strawberry airplane
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;;
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;; `delimit-columns-region' and `delimit-columns-rectangle' handle lines
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;; with different number of columns, like:
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;;
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;; horse apple bus
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;; dog pineapple car EXTRA
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;; porcupine strawberry airplane
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;;; Code:
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; User Options:
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(defvar delimit-columns-str-before ""
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"*Specify a string to be inserted before all columns.")
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(defvar delimit-columns-str-separator ", "
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"*Specify a string to be inserted between each column.")
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(defvar delimit-columns-str-after ""
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"*Specify a string to be inserted after all columns.")
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(defvar delimit-columns-separator "\t"
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"*Specify a regexp which separates each column.")
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; User Commands:
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;;;###autoload
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(defun delimit-columns-region (start end)
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"Prettify all columns in a text region.
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START and END delimits the text region."
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(interactive "*r")
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(let ((delimit-columns-str-before
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(if (stringp delimit-columns-str-before)
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delimit-columns-str-before
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""))
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(delimit-columns-str-separator
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(if (stringp delimit-columns-str-separator)
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delimit-columns-str-separator
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" "))
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(delimit-columns-str-after
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(if (stringp delimit-columns-str-after)
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delimit-columns-str-after
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""))
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(delimit-columns-limit (make-marker))
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(the-end (copy-marker end))
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delimit-columns-max)
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(save-excursion
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(goto-char start)
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(beginning-of-line)
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;; get maximum length for each column
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(save-excursion
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(while (< (point) the-end)
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(delimit-columns-rectangle-max
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(prog1
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(point)
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(end-of-line)))
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(forward-char 1)))
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;; prettify columns
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(while (< (point) the-end)
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(delimit-columns-rectangle-line
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(prog1
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(point)
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(end-of-line)))
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(forward-char 1))
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;; nullify markers
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(set-marker delimit-columns-limit nil)
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(set-marker the-end nil))))
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(require 'rect)
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;;;###autoload
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(defun delimit-columns-rectangle (start end)
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"Prettify all columns in a text rectangle.
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START and END delimits the corners of text rectangle."
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(interactive "*r")
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(let ((delimit-columns-str-before
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(if (stringp delimit-columns-str-before)
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delimit-columns-str-before
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""))
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(delimit-columns-str-separator
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(if (stringp delimit-columns-str-separator)
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delimit-columns-str-separator
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" "))
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(delimit-columns-str-after
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(if (stringp delimit-columns-str-after)
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delimit-columns-str-after
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""))
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(delimit-columns-limit (make-marker))
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(the-end (copy-marker end))
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delimit-columns-max)
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;; get maximum length for each column
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(save-excursion
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(operate-on-rectangle 'delimit-columns-rectangle-max
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start the-end t))
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;; prettify columns
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(save-excursion
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(operate-on-rectangle 'delimit-columns-rectangle-line
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start the-end t))
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;; nullify markers
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(set-marker delimit-columns-limit nil)
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(set-marker the-end nil)))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Internal Variables and Functions:
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;; to avoid compilation gripes
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(defvar delimit-columns-max nil)
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(defvar delimit-columns-limit nil)
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(defun delimit-columns-rectangle-max (startpos &optional ignore ignore)
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(set-marker delimit-columns-limit (point))
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(goto-char startpos)
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(let ((ncol 1)
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origin values)
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;; get current column length
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(while (progn
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(setq origin (current-column))
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(re-search-forward delimit-columns-separator
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delimit-columns-limit 'move))
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(save-excursion
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(goto-char (match-beginning 0))
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(setq values (cons (- (current-column) origin)
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values)))
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(setq ncol (1+ ncol)))
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(setq values (cons (- (current-column) origin)
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values))
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;; extend delimit-columns-max, if needed
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(let ((index (length delimit-columns-max)))
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(and (> ncol index)
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(let ((extend (make-vector ncol 0)))
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(while (> index 0)
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(setq index (1- index))
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(aset extend index (aref delimit-columns-max index)))
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(setq delimit-columns-max extend))))
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;; get maximum column length
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(while values
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(setq ncol (1- ncol))
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(aset delimit-columns-max ncol (max (aref delimit-columns-max ncol)
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(car values)))
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(setq values (cdr values)))))
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(defun delimit-columns-rectangle-line (startpos &optional ignore ignore)
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(let ((ncol 0)
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(len (length delimit-columns-max))
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origin)
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(set-marker delimit-columns-limit (point))
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(goto-char startpos)
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(insert delimit-columns-str-before)
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;; Adjust all columns but last one
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(while (progn
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(setq origin (current-column))
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(and (< (point) delimit-columns-limit)
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(re-search-forward delimit-columns-separator
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delimit-columns-limit 'move)))
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(delete-region (match-beginning 0) (point))
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(insert (make-string (- (aref delimit-columns-max ncol)
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(- (current-column) origin))
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?\ )
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delimit-columns-str-separator)
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(setq ncol (1+ ncol)))
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;; Adjust last column
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(insert (make-string (- (aref delimit-columns-max ncol)
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(- (current-column) origin))
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?\ ))
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;; Adjust extra columns, if needed
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(while (< (setq ncol (1+ ncol)) len)
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(insert delimit-columns-str-separator
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(make-string (aref delimit-columns-max ncol) ?\ )))
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(insert delimit-columns-str-after)))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(provide 'delim-col)
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;;; delim-col.el ends here
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