| 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 |
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| 41 | sub print_xml_usage
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| 42 | {
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| 43 | my $options = shift(@_);
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| 44 |
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| 45 | # XML output is always in UTF-8
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| 46 | &gsprintf::output_strings_in_UTF8;
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| 47 |
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| 48 | &print_xml_header();
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| 49 |
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| 50 | &gsprintf(STDERR, "<Info>\n");
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| 51 | &gsprintf(STDERR, " <Name>$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 | &gsprintf(STDERR, "<!DOCTYPE Info [\n");
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| 66 | &gsprintf(STDERR, " <!ELEMENT Info (Name, Desc, Arguments)>\n");
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| 67 | &gsprintf(STDERR, " <!ELEMENT Arguments (Option*)>\n");
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| 68 | &gsprintf(STDERR, " <!ELEMENT Option (Name, Desc, Type, Required, Range, Default?, List?)>\n");
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| 69 | &gsprintf(STDERR, " <!ELEMENT Name (#PCDATA)>\n");
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| 70 | &gsprintf(STDERR, " <!ELEMENT Desc (#PCDATA)>\n");
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| 71 | &gsprintf(STDERR, " <!ELEMENT Type (#PCDATA)>\n");
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| 72 | &gsprintf(STDERR, " <!ELEMENT Required (#PCDATA)>\n");
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| 73 | &gsprintf(STDERR, " <!ELEMENT Range (#PCDATA)>\n");
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| 74 | &gsprintf(STDERR, " <!ELEMENT Default (#PCDATA)>\n");
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| 75 | &gsprintf(STDERR, " <!ELEMENT List (Value*)>\n");
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| 76 | &gsprintf(STDERR, " <!ELEMENT Value (Name, Desc?)>\n");
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| 77 | &gsprintf(STDERR, " <!ELEMENT HiddenGLI (#PCDATA)>\n");
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| 78 | &gsprintf(STDERR, "]>\n\n");
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| 79 | }
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| 80 |
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| 81 |
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| 82 | sub print_options_xml
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| 83 | {
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| 84 | my $options = shift(@_);
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| 85 |
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| 86 | foreach my $option (@$options) {
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| 87 | my $optionname = $option->{'name'};
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| 88 | my $optiondesc = &gsprintf::lookup_string($option->{'desc'});
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| 89 |
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| 90 | # Escape '<' and '>' characters
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| 91 | $optiondesc =~ s/</&lt;/g; # doubly escaped
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| 92 | $optiondesc =~ s/>/&gt;/g;
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| 93 |
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| 94 | # Display option name, description and type
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| 95 | &gsprintf(STDERR, " <Option>\n");
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| 96 | &gsprintf(STDERR, " <Name>$optionname</Name>\n");
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| 97 | &gsprintf(STDERR, " <Desc>$optiondesc</Desc>\n");
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| 98 | &gsprintf(STDERR, " <Type>$option->{'type'}</Type>\n");
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| 99 |
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| 100 | # If the option has a required field, display this
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| 101 | if (defined($option->{'reqd'})) {
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| 102 | &gsprintf(STDERR, " <Required>$option->{'reqd'}</Required>\n");
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| 103 | }
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| 104 |
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| 105 | # If the option has a charactor length field, display this
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| 106 | if (defined($option->{'char_length'})) {
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| 107 | &gsprintf(STDERR, " <CharactorLength>$option->{'char_length'}</CharactorLength>\n");
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| 108 | }
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| 109 |
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| 110 | # If the option has a range field, display this
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| 111 | if (defined($option->{'range'})) {
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| 112 | &gsprintf(STDERR, " <Range>$option->{'range'}</Range>\n");
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| 113 | }
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| 114 |
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| 115 | # If the option has a list of possible values, display these
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| 116 | if (defined $option->{'list'}) {
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| 117 | &gsprintf(STDERR, " <List>\n");
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| 118 | my $optionvalueslist = $option->{'list'};
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| 119 | foreach my $optionvalue (@$optionvalueslist) {
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| 120 | &gsprintf(STDERR, " <Value>\n");
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| 121 | &gsprintf(STDERR, " <Name>$optionvalue->{'name'}</Name>\n");
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| 122 | if (defined $optionvalue->{'desc'}) {
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| 123 | my $optionvaluedesc = &gsprintf::lookup_string($optionvalue->{'desc'});
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| 124 |
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| 125 | # Escape '<' and '>' characters
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| 126 | $optionvaluedesc =~ s/</&lt;/g; #doubly escaped
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| 127 | $optionvaluedesc =~ s/>/&gt;/g;
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| 128 |
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| 129 | &gsprintf(STDERR, " <Desc>$optionvaluedesc</Desc>\n");
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| 130 | }
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| 131 | &gsprintf(STDERR, " </Value>\n");
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| 132 | }
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| 133 |
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| 134 | # # Special case for 'input_encoding'
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| 135 | # if ($optionname =~ m/^input_encoding$/i) {
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| 136 | # my $e = $encodings::encodings;
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| 137 | # foreach my $enc (sort {$e->{$a}->{'name'} cmp $e->{$b}->{'name'}} keys (%$e)) {
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| 138 | # &gsprintf(STDERR, " <Value>\n");
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| 139 | # &gsprintf(STDERR, " <Name>$enc</Name>\n");
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| 140 | # &gsprintf(STDERR, " <Desc>$e->{$enc}->{'name'}</Desc>\n");
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| 141 | # &gsprintf(STDERR, " </Value>\n");
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| 142 | # }
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| 143 | # }
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| 144 |
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| 145 | &gsprintf(STDERR, " </List>\n");
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| 146 | }
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| 147 |
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| 148 | # Show the default value for the option, if there is one
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| 149 | if (defined $option->{'deft'}) {
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| 150 | my $optiondeftvalue = $option->{'deft'};
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| 151 |
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| 152 | # Escape '<' and '>' characters
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| 153 | $optiondeftvalue =~ s/</&lt;/g; #doubly escaped
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| 154 | $optiondeftvalue =~ s/>/&gt;/g;
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| 155 |
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| 156 | &gsprintf(STDERR, " <Default>$optiondeftvalue</Default>\n");
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| 157 | }
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| 158 |
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| 159 | # If the option is noted as being hidden in GLI, add that to the printout
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| 160 | if (defined($option->{'hiddengli'})) {
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| 161 | &gsprintf(STDERR, " <HiddenGLI>$option->{'hiddengli'}</HiddenGLI>\n");
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| 162 | }
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| 163 | # If the argument is not hidden then print out the lowest detail mode it is visible in
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| 164 | if (defined($option->{'modegli'})) {
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| 165 | &gsprintf(STDERR, " <ModeGLI>$option->{'modegli'}</ModeGLI>\n");
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| 166 | }
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| 167 |
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| 168 | &gsprintf(STDERR, " </Option>\n");
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| 169 | }
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| 170 | }
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| 171 |
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| 172 |
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| 173 | sub print_txt_usage
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| 174 | {
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| 175 | my $options = shift(@_);
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| 176 | my $params = shift(@_);
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| 177 | my $programdesc = shift(@_);
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| 178 |
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| 179 | # this causes us to automatically send output to a pager, if one is
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| 180 | # set, AND our output is going to a terminal
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| 181 | # active state perl on windows doesn't do open(handle, "-|");
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| 182 | if ($ENV{'GSDLOS'} !~ /windows/ && -t STDOUT) {
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| 183 | my $pager = $ENV{"PAGER"};
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| 184 | if (! $pager) {$pager="(less || more)"}
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| 185 | my $pid = open(STDIN, "-|"); # this does a fork... see man perlipc(1)
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| 186 | if (!defined $pid) {
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| 187 | gsprintf(STDERR, "pluginfo.pl - can't fork: $!");
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| 188 | } else {
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| 189 | if ($pid != 0) { # parent (ie forking) process. child gets 0
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| 190 | exec ($pager);
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| 191 | }
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| 192 | }
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| 193 | open(STDERR,">&STDOUT"); # so it's easier to pipe output
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| 194 | }
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| 195 |
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| 196 |
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| 197 |
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| 198 | my $programname = $options->{'name'};
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| 199 | my $programargs = $options->{'args'};
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| 200 |
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| 201 | # Find the length of the longest option string
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| 202 | my $descoffset = 0;
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| 203 | if (defined($programargs)) {
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| 204 | $descoffset = &find_longest_option_string($programargs);
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| 205 | }
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| 206 |
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| 207 | # Produce the usage information using the data structure above
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| 208 | if ($programdesc) {
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| 209 | &gsprintf(STDERR, $programname . ": $options->{'desc'}\n\n");
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| 210 | }
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| 211 | &gsprintf(STDERR, " {common.usage}: $programname $params\n\n");
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| 212 |
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| 213 | # Display the program options, if there are some
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| 214 | if (defined($programargs)) {
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| 215 | # Calculate the column offset of the option descriptions
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| 216 | my $optiondescoffset = $descoffset + 2; # 2 spaces between options & descriptions
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| 217 |
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| 218 | &gsprintf(STDERR, " {common.options}:\n");
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| 219 |
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| 220 | # Display the program options
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| 221 | &print_options_txt($programargs, $optiondescoffset);
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| 222 | }
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| 223 | }
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| 224 |
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| 225 |
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| 226 | sub print_options_txt
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| 227 | {
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| 228 | my $options = shift(@_);
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| 229 | my $optiondescoffset = shift(@_);
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| 230 |
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| 231 | foreach my $option (@$options) {
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| 232 | # Display option name
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| 233 | my $optionname = $option->{'name'};
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| 234 | &gsprintf(STDERR, " -$optionname");
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| 235 | my $optionstringlength = length(" -$optionname");
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| 236 |
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| 237 | # Display option type, if the option is not a flag
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| 238 | my $optiontype = $option->{'type'};
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| 239 | if ($optiontype ne "flag") {
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| 240 | &gsprintf(STDERR, " <$optiontype>");
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| 241 | $optionstringlength = $optionstringlength + length(" <$optiontype>");
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| 242 | }
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| 243 |
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| 244 | # Display the option description
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| 245 | my $optiondesc = &gsprintf::lookup_string($option->{'desc'});
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| 246 | my $optionreqd = $option->{'reqd'};
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| 247 | if (defined($optionreqd) && $optionreqd eq "yes") {
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| 248 | $optiondesc = "(" . &gsprintf::lookup_string("{PrintUsage.required}") . ") " . $optiondesc;
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| 249 | }
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| 250 | &display_text_in_column($optiondesc, $optiondescoffset, $optionstringlength, 80);
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| 251 |
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| 252 | # Show the default value for the option, if there is one
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| 253 | my $optiondefault = $option->{'deft'};
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| 254 | if (defined($optiondefault)) {
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| 255 | &gsprintf(STDERR, " " x $optiondescoffset);
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| 256 | &gsprintf(STDERR, "{PrintUsage.default}: $optiondefault\n");
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| 257 | }
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| 258 |
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| 259 | # If the option has a list of possible values, display these
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| 260 | my $optionvalueslist = $option->{'list'};
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| 261 | if (defined($optionvalueslist)) {
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| 262 | &gsprintf(STDERR, "\n");
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| 263 | foreach my $optionvalue (@$optionvalueslist) {
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| 264 | my $optionvaluename = $optionvalue->{'name'};
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| 265 | &gsprintf(STDERR, " " x $optiondescoffset);
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| 266 | &gsprintf(STDERR, "$optionvaluename:");
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| 267 |
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| 268 | my $optionvaluedesc = &gsprintf::lookup_string($optionvalue->{'desc'});
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| 269 | &display_text_in_column($optionvaluedesc, $optiondescoffset + 2,
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| 270 | $optiondescoffset + length($optionvaluename), 80);
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| 271 | }
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| 272 | }
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| 273 |
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| 274 | # # Special case for 'input_encoding'
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| 275 | # if ($optionname =~ m/^input_encoding$/i) {
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| 276 | # my $e = $encodings::encodings;
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| 277 | # foreach my $enc (sort {$e->{$a}->{'name'} cmp $e->{$b}->{'name'}} keys (%$e)) {
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| 278 | # &gsprintf(STDERR, " " x $optiondescoffset);
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| 279 | # &gsprintf(STDERR, "$enc:");
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| 280 | #
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| 281 | # my $encodingdesc = $e->{$enc}->{'name'};
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| 282 | # &display_text_in_column($encodingdesc, $optiondescoffset + 2,
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| 283 | # $optiondescoffset + length("$enc:"), 80);
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| 284 | # }
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| 285 | # }
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| 286 |
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| 287 | # Add a blank line to separate options
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| 288 | &gsprintf(STDERR, "\n");
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| 289 | }
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| 290 | }
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| 291 |
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| 292 |
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| 293 | sub display_text_in_column
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| 294 | {
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| 295 | my ($text, $columnbeg, $firstlineoffset, $columnend) = @_;
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| 296 |
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| 297 | # Spaces are put *before* words, so treat the column beginning as 1 smaller than it is
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| 298 | $columnbeg = $columnbeg - 1;
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| 299 |
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| 300 | # Add some padding (if needed) for the first line
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| 301 | my $linelength = $columnbeg;
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| 302 | if ($firstlineoffset < $columnbeg) {
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| 303 | &gsprintf(STDERR, " " x ($columnbeg - $firstlineoffset));
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| 304 | }
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| 305 | else {
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| 306 | $linelength = $firstlineoffset;
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| 307 | }
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| 308 |
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| 309 | # Break the text into words, and display one at a time
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| 310 | my @words = split(/ /, $text);
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| 311 |
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| 312 | foreach my $word (@words) {
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| 313 | # If printing this word would exceed the column end, start a new line
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| 314 | if (($linelength + length($word)) >= $columnend) {
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| 315 | &gsprintf(STDERR, "\n");
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| 316 | &gsprintf(STDERR, " " x $columnbeg);
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| 317 | $linelength = $columnbeg;
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| 318 | }
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| 319 |
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| 320 | # Write the word
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| 321 | &gsprintf(STDERR, " $word");
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| 322 | $linelength = $linelength + length(" $word");
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| 323 | }
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| 324 |
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| 325 | &gsprintf(STDERR, "\n");
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| 326 | }
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| 327 |
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| 328 |
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| 329 | sub find_longest_option_string
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| 330 | {
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| 331 | my $options = shift(@_);
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| 332 |
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| 333 | my $maxlength = 0;
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| 334 | foreach my $option (@$options) {
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| 335 | my $optionname = $option->{'name'};
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| 336 | my $optiontype = $option->{'type'};
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| 337 |
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| 338 | my $optionlength = length(" -$optionname");
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| 339 | if ($optiontype ne "flag") {
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| 340 | $optionlength = $optionlength + length(" <$optiontype>");
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| 341 | }
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| 342 |
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| 343 | # Remember the longest
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| 344 | if ($optionlength > $maxlength) {
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| 345 | $maxlength = $optionlength;
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| 346 | }
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| 347 | }
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| 348 | return $maxlength;
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| 349 | }
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| 350 |
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| 351 |
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| 352 | 1;
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