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+ ##
+ ## iSelect -- Interactive Selection Tool
+ ##
+ ## iSelect is a Curses-based tool for interactive line selection
+ ## in an ASCII file via a full-screen terminal session.
+ ##
+ ## ======================================================================
+ ##
+ ## Copyright (c) 1996-1999 Ralf S. Engelschall.
+ ##
+ ## This program is free software; it may be redistributed and/or
+ ## modified only under the terms of the GNU General Public License,
+ ## which may be found in the iSelect source distribution.
+ ## Look at the file COPYING for details.
+ ##
+ ## This program is distributed in the hope that it will be useful,
+ ## but WITHOUT ANY WARRANTY; without even the implied warranty of
+ ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ ## See the the GNU General Public License for more details.
+ ##
+ ## ======================================================================
+ ##
+ ## iselect.pod -- manual page
+ ##
+
+ =head1 NAME
+
+ iSelect -- Interactive Selection Tool
+
+ =head1 SYNOPSIS
+
+ B<iselect>
+ [B<-d> I<STR>,I<STR>]
+ [B<-c>]
+ [B<-f>]
+ [B<-a>]
+ [B<-e>]
+ [B<-p> I<NUM>]
+ [B<-k> I<KEY>[:I<OKEY>]]
+ [B<-m>]
+ [B<-n> I<STR>]
+ [B<-t> I<STR>]
+ [B<-S>]
+ [B<-K>]
+ [B<-P>]
+ [B<-Q> I<STR>]
+ [I<line1> I<line2> ...]
+
+ B<iselect>
+ [B<-V>]
+
+ =head1 VERSION
+
+ @V@
+
+ =head1 DESCRIPTION
+
+ =head2 Intend
+
+ iSelect is an interactive line selection tool for ASCII files, operating via a
+ full-screen Curses-based terminal session. It can be used either as an user
+ interface frontend controlled by a Bourne-Shell, Perl or other type of script
+ backend as its wrapper or in batch as a pipe filter (usually between F<grep>
+ and the final executing command). In other words: iSelect was designed to be
+ used for any types of interactice line-based selections.
+
+ =head2 Input Data
+
+ Input is read either from the command line (I<line1> I<line2> ...) where each
+ argument corresponds to one buffer line or from F<stdin> (when no arguments
+ are given) where the buffer lines are determined according to the newline
+ characters.
+
+ You can additionally let substrings displayed in Bold mode for non-selectable
+ lines (because the selectable lines are always displayed bold) by using the
+ construct ``C<E<lt>bE<gt>>...C<E<lt>/bE<gt>>'' as in HTML.
+
+ =head2 Selections
+
+ The selection is either just a single line (default) or multiple lines (option
+ B<-m>). Per default no lines are selectable. If a line contains the string
+ ``C<E<lt>sE<gt>>'' (or a string with different delimiters configured via
+ option B<-d>) at any position this string is stripped and the line is
+ selectable. Its result (printed to F<stdout>) is the line contents itself (but
+ without the ``C<E<lt>sE<gt>>'' string of course). If option B<-a> is used all
+ lines are selectable and their result is again the line itself, i.e. using
+ option B<-a> is the same as adding ``C<E<lt>sE<gt>>'' to every line of the
+ input data. When you want a specific result (i.e. not just the line contents
+ itself), you have to use the special variant ``C<E<lt>s:result textE<gt>>''
+ which results in the output ``C<result text>'' when the corresponding line is
+ selected.
+
+ When you use a specific result via ``C<E<lt>s:result textE<gt>>'' the I<result
+ text> can contain ``C<%[query text]s>'' and ``C<%[query text]S>''
+ constructs. For every such construct an interactive query is done and the
+ result replaces the construct. The ``C<%[query text]S>'' construct is like
+ ``C<%[query text]s>'' except that the empty string as the query result is not
+ accepted on input.
+
+ The Curses-based full-screen selection is always done via F</dev/tty>, because
+ the F<stdin> and F<stdout> filehandles are usually tied to the input and
+ output data streams.
+
+ =head2 Output Data
+
+ The output is the line itself or the string given with ``C<E<lt>s:result
+ textE<gt>>''. When multiple line selection mode (option B<-m>) is used the
+ output is all selected lines theirself or their configured result strings.
+ Output always is written to F<stdout>.
+
+ =head1 OPTIONS
+
+ =head2 Input Options
+
+ These options control how I<iSelect> parses its input.
+
+ =over 4
+
+ =item B<-d> I<STR>, B<--delimiter=>I<STR>
+
+ Sets the delimiters for the selection tags. The default is `C<E<lt>,E<gt>>',
+ i.e. the selection tags have to read ``C<E<lt>sE<gt>>'' and ``C<E<lt>s:result
+ textE<gt>>''
+
+ =item B<-c>, B<--strip-comments>
+
+ Strips all sharp comment lines from the input buffer before parsing.
+
+ =item B<-f>, B<--force-browse>
+
+ Browse always, i.e. even when the input buffer contains no or only one line.
+
+ =item B<-a>, B<--all-select>
+
+ Force all lines to be selectable.
+
+ =item B<-e>, B<--exit-no-select>
+
+ Exit immediately if no lines are selectable. In this case not even the Curses
+ screen is initialized.
+
+ =back
+
+ =head2 Display Options
+
+ =over 4
+
+ =item B<-p> I<NUM>, B<--position=>I<NUM>
+
+ Sets the cursor position to line I<NUM>.
+
+ =item B<-k> I<KEY>[:I<OKEY>], B<--key=>I<KEY[:I<OKEY>]>
+
+ Defines an additional input key. Per default I<OKEY> is C<RETURN>, i.e. for
+ instance B<-kf> defines another selection key `C<f>'.
+
+ =item B<-m>, B<--multi-line>
+
+ Enable multi-line selection where you can select more then one line via SPACE
+ key.
+
+ =item B<-n> I<STR>, B<--name=>I<STR>
+
+ Sets the name string, displayed flush left at the bottom of the
+ browser window.
+
+ =item B<-t> I<STR>, B<--title=>I<STR>
+
+ Sets the title bar string, displayed centered at the bottom of the
+ browser window.
+
+ =back
+
+ =head2 Output Options
+
+ =over 4
+
+ =item B<-S>, B<--strip-result>
+
+ Strip all leading and trailing whitespaces from the result string.
+
+ =item B<-K>, B<--key-result>
+
+ Prefix the result string (given on F<stdout>) with the corresponding selection
+ key which was used. This usually is C<RETURN> or C<KEY_RIGHT> but can be any
+ of the additional keys defined by option B<-k>. When you use B<-kf> and
+ select a line C<Foo Bar> with key `C<f>' the result string is ``C<f:Foo
+ Bar>''.
+
+ =item B<-P>, B<--position-result>
+
+ Prefix the result string (given on F<stdout>) with the corresponding cursor
+ position followed by a colon. When you selected line I<N> and this line has
+ the result C<Foo Bar> configured the result string is ``C<N:Foo Bar>''.
+
+ =item B<-Q> I<STR>, B<--quit-result=>I<STR>
+
+ Sets the result string on quit. Default is the empty string.
+
+ =back
+
+ =head2 Giving Feedback
+
+ =over 4
+
+ =item B<-V>, B<--version>
+
+ Displays version identification string.
+
+ =back
+
+ =head1 KEYSTROKES
+
+ =head2 Cursor Movement
+
+ Use these to browse through the selection list.
+
+ CURSOR-UP ..... Move cursor one line up
+ CURSOR-DOWN ... Move cursor one line down
+ PAGE-UP ....... Move cursor one page up
+ PAGE-DOWN ..... Move cursor one page down
+ g ............. Goto first line
+ G ............. Goto last line
+
+ =head2 Line Selection
+
+ Use these to select one line and exit in standard mode or one or more lines in
+ multi-line mode.
+
+ RETURN ........ Select line and exit
+ CURSOR-RIGHT .. Select line and exit
+ SPACE ......... Select line and stay (multi-line mode only)
+
+ =head2 Others
+
+ Use these to quit iSelect or to show its help and
+ version page.
+
+ q ............. Quit (exit without selection)
+ CURSOR-LEFT ... Quit (exit without selection)
+ h ............. Help Page
+ v ............. Version Page
+
+ =head1 EXAMPLE
+
+ As an example we present a real-life situation where iSelect can enhance an
+ existing functionality. We define two Bash functions (for your
+ F<$HOME/.bashrc> file) which enhance the built-in `F<cd>' command of the
+ shell.
+
+ # database scan for enhanced cd command
+ cds () {
+ (cd $HOME;
+ find . -type d -print |\
+ sed -e "s;^\.;$HOME;" |\
+ sort -u >$HOME/.cdpaths ) &
+ }
+
+ # definition of the enhanced cd command
+ cd () {
+ if [ -d $1 ]; then
+ builtin cd $1
+ else
+ builtin cd `egrep "/$1[^/]*$" $HOME/.cdpaths |\
+ iselect -a -Q $1 -n "chdir" \
+ -t "Change Directory to..."`
+ fi
+ PS1="\u@\h:$PWD\n:> "
+ }
+
+ This new `F<cd>' command is compatible with Bashs built-in variant for the case
+ where the specified directory actually exists. When it doesn't, the original
+ `F<cd>' would immediately give an error (assuming we have no F<CDPATH>
+ variable defined). Here this enhanced version tries harder. First it searches
+ for such a directory in a previously built (via F<cds>) F<$HOME/.cdpaths>
+ files. When no line was found, iSelect just returns the given directory as the
+ default result and `F<cd>' then fails as usual with an error message. When
+ only one directory was found, iSelect directly results this particular line to
+ `F<cd>'. And only when more then one directory was found, iSelect opens its
+ Curses-based selection screen and lets the user choose interactively between
+ those directories. The chosen directory is then finally given to `F<cd>'.
+
+ For more useful examples on how to use iSelect, see the F<contrib/> directory
+ of the iSelect distribution tarball.
+
+ =head1 AUTHOR
+
+ Ralf S. Engelschall
+ rse@engelschall.com
+ www.engelschall.com
+
+ =head1 SEE ALSO
+
+ iSelect Home: http://www.engelschall.com/sw/iselect/
+
+ =cut
+
+ ##EOF##
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