| 1 | ###########################################################################
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| 2 | #
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| 3 | # printusage.pm --
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| 4 | # A component of the Greenstone digital library software
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| 5 | # from the New Zealand Digital Library Project at the
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| 6 | # University of Waikato, New Zealand.
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| 7 | #
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| 8 | # Copyright (C) 1999 New Zealand Digital Library Project
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| 9 | #
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| 10 | # This program is free software; you can redistribute it and/or modify
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| 11 | # it under the terms of the GNU General Public License as published by
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| 12 | # the Free Software Foundation; either version 2 of the License, or
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| 13 | # (at your option) any later version.
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| 14 | #
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| 15 | # This program is distributed in the hope that it will be useful,
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| 16 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 18 | # GNU General Public License for more details.
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| 19 | #
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| 20 | # You should have received a copy of the GNU General Public License
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| 21 | # along with this program; if not, write to the Free Software
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| 22 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 23 | #
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| 24 | ###########################################################################
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| 25 |
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| 26 |
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| 27 | package PrintUsage;
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| 28 |
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| 29 |
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| 30 | use gsprintf;
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| 31 | use strict;
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| 32 | no strict 'subs'; # allow barewords (eg STDERR) as function arguments
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| 33 |
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| 34 |
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| 35 | sub gsprintf
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| 36 | {
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| 37 | return &gsprintf::gsprintf(@_);
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| 38 | }
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| 39 |
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| 40 | # this is not called by plugins or classifiers, just by scripts
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| 41 | sub print_xml_usage
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| 42 | {
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| 43 | my $options = shift(@_);
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| 44 |
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| 45 | # XML output is always in UTF-8
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| 46 | &gsprintf::output_strings_in_UTF8;
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| 47 |
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| 48 | &print_xml_header("script");
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| 49 |
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| 50 | &gsprintf(STDERR, "<Info>\n");
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| 51 | &gsprintf(STDERR, " <Name>$options->{'name'}</Name>\n");
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| 52 | &gsprintf(STDERR, " <Desc>$options->{'desc'}</Desc>\n");
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| 53 | &gsprintf(STDERR, " <Arguments>\n");
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| 54 | if (defined($options->{'args'})) {
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| 55 | &print_options_xml($options->{'args'});
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| 56 | }
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| 57 | &gsprintf(STDERR, " </Arguments>\n");
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| 58 | &gsprintf(STDERR, "</Info>\n");
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| 59 | }
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| 60 |
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| 61 |
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| 62 | sub print_xml_header
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| 63 | {
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| 64 | &gsprintf(STDERR, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
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| 65 | }
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| 66 |
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| 67 |
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| 68 | sub print_options_xml
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| 69 | {
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| 70 | my $options = shift(@_);
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| 71 |
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| 72 | foreach my $option (@$options) {
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| 73 | my $optionname = $option->{'name'};
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| 74 | my $displayname = $option->{'disp'};
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| 75 |
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| 76 | my $optiondesc = &gsprintf::lookup_string($option->{'desc'});
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| 77 |
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| 78 | # Escape '<' and '>' characters
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| 79 | $optiondesc =~ s/</&lt;/g; # doubly escaped
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| 80 | $optiondesc =~ s/>/&gt;/g;
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| 81 |
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| 82 | # Display option name, description and type
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| 83 | &gsprintf(STDERR, " <Option>\n");
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| 84 | &gsprintf(STDERR, " <Name>$optionname</Name>\n");
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| 85 | if (defined($option->{'disp'})) {
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| 86 | my $displayname = &gsprintf::lookup_string($option->{'disp'});
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| 87 | # Escape '<' and '>' characters
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| 88 | $displayname =~ s/</&lt;/g; # doubly escaped
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| 89 | $displayname =~ s/>/&gt;/g;
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| 90 | &gsprintf(STDERR, " <DisplayName>$displayname</DisplayName>\n");
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| 91 | }
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| 92 | &gsprintf(STDERR, " <Desc>$optiondesc</Desc>\n");
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| 93 | &gsprintf(STDERR, " <Type>$option->{'type'}</Type>\n");
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| 94 |
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| 95 | # If the option has a required field, display this
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| 96 | if (defined($option->{'reqd'})) {
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| 97 | &gsprintf(STDERR, " <Required>$option->{'reqd'}</Required>\n");
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| 98 | }
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| 99 |
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| 100 | # If the option has a charactor length field, display this
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| 101 | if (defined($option->{'char_length'})) {
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| 102 | &gsprintf(STDERR, " <CharactorLength>$option->{'char_length'}</CharactorLength>\n");
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| 103 | }
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| 104 |
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| 105 | # If the option has a range field, display this
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| 106 | if (defined($option->{'range'})) {
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| 107 | &gsprintf(STDERR, " <Range>$option->{'range'}</Range>\n");
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| 108 | }
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| 109 |
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| 110 | # If the option has a list of possible values, display these
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| 111 | if (defined $option->{'list'}) {
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| 112 | &gsprintf(STDERR, " <List>\n");
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| 113 | my $optionvalueslist = $option->{'list'};
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| 114 | foreach my $optionvalue (@$optionvalueslist) {
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| 115 | &gsprintf(STDERR, " <Value>\n");
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| 116 | &gsprintf(STDERR, " <Name>$optionvalue->{'name'}</Name>\n");
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| 117 | if (defined $optionvalue->{'desc'}) {
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| 118 | my $optionvaluedesc = &gsprintf::lookup_string($optionvalue->{'desc'});
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| 119 |
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| 120 | # Escape '<' and '>' characters
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| 121 | $optionvaluedesc =~ s/</&lt;/g; #doubly escaped
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| 122 | $optionvaluedesc =~ s/>/&gt;/g;
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| 123 |
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| 124 | &gsprintf(STDERR, " <Desc>$optionvaluedesc</Desc>\n");
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| 125 | }
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| 126 | &gsprintf(STDERR, " </Value>\n");
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| 127 | }
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| 128 |
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| 129 | # # Special case for 'input_encoding'
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| 130 | # if ($optionname =~ m/^input_encoding$/i) {
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| 131 | # my $e = $encodings::encodings;
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| 132 | # foreach my $enc (sort {$e->{$a}->{'name'} cmp $e->{$b}->{'name'}} keys (%$e)) {
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| 133 | # &gsprintf(STDERR, " <Value>\n");
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| 134 | # &gsprintf(STDERR, " <Name>$enc</Name>\n");
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| 135 | # &gsprintf(STDERR, " <Desc>$e->{$enc}->{'name'}</Desc>\n");
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| 136 | # &gsprintf(STDERR, " </Value>\n");
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| 137 | # }
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| 138 | # }
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| 139 |
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| 140 | &gsprintf(STDERR, " </List>\n");
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| 141 | }
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| 142 |
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| 143 | # Show the default value for the option, if there is one
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| 144 | if (defined $option->{'deft'}) {
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| 145 | my $optiondeftvalue = $option->{'deft'};
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| 146 |
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| 147 | # Escape '<' and '>' characters
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| 148 | $optiondeftvalue =~ s/</</g;
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| 149 | $optiondeftvalue =~ s/>/>/g;
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| 150 |
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| 151 | &gsprintf(STDERR, " <Default>$optiondeftvalue</Default>\n");
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| 152 | }
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| 153 |
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| 154 | # If the option is noted as being hidden in GLI, add that to the printout
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| 155 | if (defined($option->{'hiddengli'})) {
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| 156 | &gsprintf(STDERR, " <HiddenGLI>$option->{'hiddengli'}</HiddenGLI>\n");
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| 157 | }
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| 158 | # If the argument is not hidden then print out the lowest detail mode it is visible in
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| 159 | if (defined($option->{'modegli'})) {
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| 160 | &gsprintf(STDERR, " <ModeGLI>$option->{'modegli'}</ModeGLI>\n");
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| 161 | }
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| 162 |
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| 163 | &gsprintf(STDERR, " </Option>\n");
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| 164 | }
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| 165 | }
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| 166 |
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| 167 |
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| 168 | sub print_txt_usage
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| 169 | {
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| 170 | my $options = shift(@_);
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| 171 | my $params = shift(@_);
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| 172 |
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| 173 | # this causes us to automatically send output to a pager, if one is
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| 174 | # set, AND our output is going to a terminal
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| 175 | # active state perl on windows doesn't do open(handle, "-|");
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| 176 | if ($ENV{'GSDLOS'} !~ /windows/ && -t STDOUT) {
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| 177 | my $pager = $ENV{"PAGER"};
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| 178 | if (! $pager) {$pager="(less || more)"}
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| 179 | my $pid = open(STDIN, "-|"); # this does a fork... see man perlipc(1)
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| 180 | if (!defined $pid) {
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| 181 | gsprintf(STDERR, "pluginfo.pl - can't fork: $!");
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| 182 | } else {
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| 183 | if ($pid != 0) { # parent (ie forking) process. child gets 0
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| 184 | exec ($pager);
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| 185 | }
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| 186 | }
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| 187 | open(STDERR,">&STDOUT"); # so it's easier to pipe output
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| 188 | }
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| 189 |
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| 190 |
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| 191 |
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| 192 | my $programname = $options->{'name'};
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| 193 | my $programargs = $options->{'args'};
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| 194 | my $programdesc = $options->{'desc'};
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| 195 |
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| 196 | # Find the length of the longest option string
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| 197 | my $descoffset = 0;
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| 198 | if (defined($programargs)) {
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| 199 | $descoffset = &find_longest_option_string($programargs);
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| 200 | }
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| 201 |
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| 202 | # Produce the usage information using the data structure above
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| 203 | if (defined($programdesc)) {
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| 204 | &gsprintf(STDERR, $programname . ": $options->{'desc'}\n\n");
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| 205 | }
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| 206 |
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| 207 | &gsprintf(STDERR, " {common.usage}: $programname $params\n\n");
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| 208 |
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| 209 | # Display the program options, if there are some
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| 210 | if (defined($programargs)) {
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| 211 | # Calculate the column offset of the option descriptions
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| 212 | my $optiondescoffset = $descoffset + 2; # 2 spaces between options & descriptions
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| 213 |
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| 214 | &gsprintf(STDERR, " {common.options}:\n");
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| 215 |
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| 216 | # Display the program options
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| 217 | &print_options_txt($programargs, $optiondescoffset);
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| 218 | }
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| 219 | }
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| 220 |
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| 221 |
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| 222 | sub print_options_txt
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| 223 | {
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| 224 | my $options = shift(@_);
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| 225 | my $optiondescoffset = shift(@_);
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| 226 |
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| 227 | foreach my $option (@$options) {
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| 228 | # Display option name
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| 229 | my $optionname = $option->{'name'};
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| 230 | &gsprintf(STDERR, " -$optionname");
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| 231 | my $optionstringlength = length(" -$optionname");
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| 232 |
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| 233 | # Display option type, if the option is not a flag
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| 234 | my $optiontype = $option->{'type'};
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| 235 | if ($optiontype ne "flag") {
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| 236 | &gsprintf(STDERR, " <$optiontype>");
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| 237 | $optionstringlength = $optionstringlength + length(" <$optiontype>");
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| 238 | }
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| 239 |
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| 240 | # Display the option description
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| 241 | if (defined($option->{'disp'})) {
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| 242 | my $optiondisp = &gsprintf::lookup_string($option->{'disp'});
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| 243 | &display_text_in_column($optiondisp, $optiondescoffset, $optionstringlength, 80);
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| 244 | &gsprintf(STDERR, " " x $optionstringlength);
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| 245 | }
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| 246 | my $optiondesc = &gsprintf::lookup_string($option->{'desc'});
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| 247 | my $optionreqd = $option->{'reqd'};
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| 248 | if (defined($optionreqd) && $optionreqd eq "yes") {
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| 249 | $optiondesc = "(" . &gsprintf::lookup_string("{PrintUsage.required}") . ") " . $optiondesc;
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| 250 | }
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| 251 | &display_text_in_column($optiondesc, $optiondescoffset, $optionstringlength, 80);
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| 252 |
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| 253 | # Show the default value for the option, if there is one
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| 254 | my $optiondefault = $option->{'deft'};
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| 255 | if (defined($optiondefault)) {
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| 256 | &gsprintf(STDERR, " " x $optiondescoffset);
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| 257 | &gsprintf(STDERR, "{PrintUsage.default}: $optiondefault\n");
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| 258 | }
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| 259 |
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| 260 | # If the option has a list of possible values, display these
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| 261 | my $optionvalueslist = $option->{'list'};
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| 262 | if (defined($optionvalueslist)) {
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| 263 | &gsprintf(STDERR, "\n");
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| 264 | foreach my $optionvalue (@$optionvalueslist) {
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| 265 | my $optionvaluename = $optionvalue->{'name'};
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| 266 | &gsprintf(STDERR, " " x $optiondescoffset);
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| 267 | &gsprintf(STDERR, "$optionvaluename:");
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| 268 |
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| 269 | my $optionvaluedesc = &gsprintf::lookup_string($optionvalue->{'desc'});
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| 270 | &display_text_in_column($optionvaluedesc, $optiondescoffset + 2,
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| 271 | $optiondescoffset + length($optionvaluename), 80);
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| 272 | }
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| 273 | }
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| 274 |
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| 275 | # # Special case for 'input_encoding'
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| 276 | # if ($optionname =~ m/^input_encoding$/i) {
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| 277 | # my $e = $encodings::encodings;
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| 278 | # foreach my $enc (sort {$e->{$a}->{'name'} cmp $e->{$b}->{'name'}} keys (%$e)) {
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| 279 | # &gsprintf(STDERR, " " x $optiondescoffset);
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| 280 | # &gsprintf(STDERR, "$enc:");
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| 281 | #
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| 282 | # my $encodingdesc = $e->{$enc}->{'name'};
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| 283 | # &display_text_in_column($encodingdesc, $optiondescoffset + 2,
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| 284 | # $optiondescoffset + length("$enc:"), 80);
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| 285 | # }
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| 286 | # }
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| 287 |
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| 288 | # Add a blank line to separate options
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| 289 | &gsprintf(STDERR, "\n");
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| 290 | }
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| 291 | }
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| 292 |
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| 293 |
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| 294 | sub display_text_in_column
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| 295 | {
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| 296 | my ($text, $columnbeg, $firstlineoffset, $columnend) = @_;
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| 297 |
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| 298 | # Spaces are put *before* words, so treat the column beginning as 1 smaller than it is
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| 299 | $columnbeg = $columnbeg - 1;
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| 300 |
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| 301 | # Add some padding (if needed) for the first line
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| 302 | my $linelength = $columnbeg;
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| 303 | if ($firstlineoffset < $columnbeg) {
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| 304 | &gsprintf(STDERR, " " x ($columnbeg - $firstlineoffset));
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| 305 | }
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| 306 | else {
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| 307 | $linelength = $firstlineoffset;
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| 308 | }
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| 309 |
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| 310 | # Break the text into words, and display one at a time
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| 311 | my @words = split(/ /, $text);
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| 312 |
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| 313 | foreach my $word (@words) {
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| 314 | # If printing this word would exceed the column end, start a new line
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| 315 | if (($linelength + length($word)) >= $columnend) {
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| 316 | &gsprintf(STDERR, "\n");
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| 317 | &gsprintf(STDERR, " " x $columnbeg);
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| 318 | $linelength = $columnbeg;
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| 319 | }
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| 320 |
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| 321 | # Write the word
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| 322 | &gsprintf(STDERR, " $word");
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| 323 | $linelength = $linelength + length(" $word");
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| 324 | }
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| 325 |
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| 326 | &gsprintf(STDERR, "\n");
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| 327 | }
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| 328 |
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| 329 |
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| 330 | sub find_longest_option_string
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| 331 | {
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| 332 | my $options = shift(@_);
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| 333 |
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| 334 | my $maxlength = 0;
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| 335 | foreach my $option (@$options) {
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| 336 | my $optionname = $option->{'name'};
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| 337 | my $optiontype = $option->{'type'};
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| 338 |
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| 339 | my $optionlength = length(" -$optionname");
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| 340 | if ($optiontype ne "flag") {
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| 341 | $optionlength = $optionlength + length(" <$optiontype>");
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| 342 | }
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| 343 |
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| 344 | # Remember the longest
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| 345 | if ($optionlength > $maxlength) {
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| 346 | $maxlength = $optionlength;
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| 347 | }
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| 348 | }
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| 349 | return $maxlength;
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| 350 | }
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| 351 |
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| 352 |
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| 353 | 1;
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