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483 lines
15 KiB
EmacsLisp
483 lines
15 KiB
EmacsLisp
;;; delim-col.el --- prettify all columns in a region or rectangle
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;; Copyright (C) 1999, 2000 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: <2001-10-13 10:02:26 pavel>
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;; Version: 2.1
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;; Keywords: internal
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;; X-URL: http://www.cpqd.com.br/~vinicius/emacs/
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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-before "")
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;; (setq delimit-columns-after "")
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;; (setq delimit-columns-separator "\t")
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;; (setq delimit-columns-format 'separator)
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;; (setq delimit-columns-extra 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 to 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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;; Now, if we change settings to:
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;;
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;; (setq delimit-columns-before "<")
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;; (setq delimit-columns-after ">")
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;;
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;; For the `delimit-columns-region' example above, the result is:
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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 for the `delimit-columns-rectangle' example above, the result is:
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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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;; See `delimit-columns-format' variable documentation for column formating.
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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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;;
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;; Use `delimit-columns-customize' to customize delim-col package variables.
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;;; Code:
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; User Options:
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(defgroup columns nil
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"Prettify columns"
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:link '(emacs-library-link :tag "Source Lisp File" "delim-col.el")
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:prefix "delimit-columns-"
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:group 'internal)
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(defcustom delimit-columns-str-before ""
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"*Specify a string to be inserted before all columns."
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:type '(string :tag "Before All Columns")
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:group 'columns)
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(defcustom delimit-columns-str-separator ", "
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"*Specify a string to be inserted between each column."
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:type '(string :tag "Between Each Column")
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:group 'columns)
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(defcustom delimit-columns-str-after ""
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"*Specify a string to be inserted after all columns."
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:type '(string :tag "After All Columns")
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:group 'columns)
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(defcustom delimit-columns-before ""
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"*Specify a string to be inserted before each column."
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:type '(string :tag "Before Each Column")
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:group 'columns)
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(defcustom delimit-columns-after ""
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"*Specify a string to be inserted after each column."
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:type '(string :tag "After Each Column")
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:group 'columns)
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(defcustom delimit-columns-separator "\t"
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"*Specify a regexp which separates each column."
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:type '(regexp :tag "Column Separator")
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:group 'columns)
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(defcustom delimit-columns-format t
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"*Specify how to format columns.
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For examples below, consider:
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+ columns `ccc' and `dddd',
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+ the maximum column length for each column is 6,
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+ and the following settings:
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(setq delimit-columns-before \"<\")
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(setq delimit-columns-after \">\")
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(setq delimit-columns-separator \":\")
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Valid values are:
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nil no formating. That is, `delimit-columns-after' is followed by
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`delimit-columns-separator'.
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For example, the result is: \"<ccc>:<dddd>:\"
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t align columns. That is, `delimit-columns-after' is followed by
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`delimit-columns-separator' and then followed by spaces.
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For example, the result is: \"<ccc>: <dddd>: \"
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'separator align separators. That is, `delimit-columns-after' is followed
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by spaces and then followed by `delimit-columns-separator'.
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For example, the result is: \"<ccc> :<dddd> :\"
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'padding format column by filling with spaces before
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`delimit-columns-after'. That is, spaces are followed by
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`delimit-columns-after' and then followed by
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`delimit-columns-separator'.
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For example, the result is: \"<ccc >:<dddd >:\"
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Any other value is treated as t."
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:type '(choice :menu-tag "Column Formating"
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:tag "Column Formating"
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(const :tag "No Formating" nil)
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(const :tag "Column Alignment" t)
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(const :tag "Separator Aligment" separator)
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(const :tag "Column Padding" padding))
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:group 'columns)
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(defcustom delimit-columns-extra t
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"*Non-nil means that lines will have the same number of columns.
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This has effect only when there are lines with different number of columns."
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:type '(boolean :tag "Lines With Same Number Of Column")
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:group 'columns)
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(defcustom delimit-columns-start 0
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"*Specify column number to start prettifing.
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See also `delimit-columns-end' for documentation.
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The following relation must hold:
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0 <= delimit-columns-start <= delimit-columns-end
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The column number start from 0 and it's relative to the beginning of selected
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region. So if you selected a text region, the first column (column 0) is
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located at beginning of line. If you selected a text rectangle, the first
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column (column 0) is located at left corner."
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:type '(integer :tag "Column Start")
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:group 'columns)
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(defcustom delimit-columns-end 1000000
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"*Specify column number to end prettifing.
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See also `delimit-columns-start' for documentation.
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The following relation must hold:
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0 <= delimit-columns-start <= delimit-columns-end
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The column number start from 0 and it's relative to the beginning of selected
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region. So if you selected a text region, the first column (column 0) is
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located at beginning of line. If you selected a text rectangle, the first
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column (column 0) is located at left corner."
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:type '(integer :tag "Column End")
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:group 'columns)
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; User Commands:
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;;;###autoload
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(defun delimit-columns-customize ()
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"Customization of `columns' group."
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(interactive)
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(customize-group 'columns))
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(defmacro delimit-columns-str (str)
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`(if (stringp ,str) ,str ""))
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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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(delimit-columns-str delimit-columns-str-before))
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(delimit-columns-str-separator
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(delimit-columns-str delimit-columns-str-separator))
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(delimit-columns-str-after
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(delimit-columns-str delimit-columns-str-after))
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(delimit-columns-before
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(delimit-columns-str delimit-columns-before))
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(delimit-columns-after
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(delimit-columns-str delimit-columns-after))
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(delimit-columns-start
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(if (and (integerp delimit-columns-start)
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(>= delimit-columns-start 0))
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delimit-columns-start
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0))
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(delimit-columns-end
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(if (integerp delimit-columns-end)
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delimit-columns-end
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1000000))
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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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(when (<= delimit-columns-start delimit-columns-end)
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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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(and delimit-columns-format
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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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(delimit-columns-str delimit-columns-str-before))
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(delimit-columns-str-separator
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(delimit-columns-str delimit-columns-str-separator))
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(delimit-columns-str-after
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(delimit-columns-str delimit-columns-str-after))
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(delimit-columns-before
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(delimit-columns-str delimit-columns-before))
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(delimit-columns-after
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(delimit-columns-str delimit-columns-after))
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(delimit-columns-start
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(if (and (integerp delimit-columns-start)
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(>= delimit-columns-start 0))
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delimit-columns-start
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0))
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(delimit-columns-end
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(if (integerp delimit-columns-end)
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delimit-columns-end
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1000000))
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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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(when (<= delimit-columns-start delimit-columns-end)
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;; get maximum length for each column
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(and delimit-columns-format
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(save-excursion
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(operate-on-rectangle 'delimit-columns-rectangle-max
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start the-end nil)))
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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 nil))
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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 ignore1 ignore2)
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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 ignore1 ignore2)
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(let ((len (length delimit-columns-max))
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(ncol 0)
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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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;; skip initial columns
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(while (and (< ncol delimit-columns-start)
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(< (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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(setq ncol (1+ ncol)))
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;; insert first formating
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(insert delimit-columns-str-before delimit-columns-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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(or (< ncol delimit-columns-end)
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(progn
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(goto-char (match-beginning 0))
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nil))))
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(delete-region (match-beginning 0) (point))
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(delimit-columns-format
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(and delimit-columns-format
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(make-string (- (aref delimit-columns-max ncol)
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(- (current-column) origin))
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?\ )))
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(setq ncol (1+ ncol)))
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;; Prepare last column spaces
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(let ((spaces (and delimit-columns-format
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(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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(and delimit-columns-extra
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(while (and (< (setq ncol (1+ ncol)) len)
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(<= ncol delimit-columns-end))
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(delimit-columns-format spaces)
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(setq spaces (and delimit-columns-format
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(make-string (aref delimit-columns-max ncol)
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?\ )))))
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;; insert last formating
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(cond ((null delimit-columns-format)
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(insert delimit-columns-after delimit-columns-str-after))
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((eq delimit-columns-format 'padding)
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(insert spaces delimit-columns-after delimit-columns-str-after))
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(t
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(insert delimit-columns-after spaces delimit-columns-str-after))
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))
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(goto-char (max (point) delimit-columns-limit))))
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(defun delimit-columns-format (spaces)
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(cond ((null delimit-columns-format)
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(insert delimit-columns-after
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delimit-columns-str-separator
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delimit-columns-before))
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((eq delimit-columns-format 'separator)
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(insert delimit-columns-after
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spaces
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delimit-columns-str-separator
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delimit-columns-before))
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((eq delimit-columns-format 'padding)
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(insert spaces
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delimit-columns-after
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delimit-columns-str-separator
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delimit-columns-before))
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(t
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(insert delimit-columns-after
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delimit-columns-str-separator
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spaces
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delimit-columns-before))
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))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(provide 'delim-col)
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;;; delim-col.el ends here
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