| 1 | ###########################################################################
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| 2 | #
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| 3 | # gsprintf.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 | use strict;
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| 26 | no strict 'refs';
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| 27 |
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| 28 | package gsprintf;
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| 29 | require Exporter;
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| 30 | @gsprintf::ISA=qw(Exporter);
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| 31 |
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| 32 | use unicode;
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| 33 | use util;
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| 34 |
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| 35 | use Cwd;
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| 36 |
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| 37 | @gsprintf::EXPORT_OK = qw(gsprintf); # functions we can export into namespace
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| 38 |
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| 39 |
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| 40 | # Language-specific resource bundle
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| 41 | my %specialresourcebundle = ();
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| 42 | our $specialoutputencoding; # our, so that it can be changed outside.
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| 43 |
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| 44 | # Default resource bundle
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| 45 | my %defaultresourcebundle;
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| 46 | my $defaultoutputencoding;
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| 47 |
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| 48 | # English resource bundle
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| 49 | my %englishresourcebundle;
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| 50 | my $englishoutputencoding;
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| 51 |
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| 52 | # Ignore the OutputEncoding strings in the resource bundles and output all text in UTF-8
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| 53 | my $outputstringsinUTF8 = 0;
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| 54 |
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| 55 |
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| 56 | sub gsprintf
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| 57 | {
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| 58 | my ($handle, $text_string, @text_arguments) = @_;
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| 59 |
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| 60 | # Return unless the required arguments were supplied
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| 61 | return unless (defined($handle) && defined($text_string));
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| 62 |
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| 63 | # Look up all the strings in the dictionary
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| 64 | $text_string =~ s/(\{[^\}]+\})/&lookup_string($1)/eg;
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| 65 |
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| 66 | # Resolve the string arguments using sprintf, then write out to the handle
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| 67 | print $handle sprintf($text_string, @text_arguments);
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| 68 | }
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| 69 |
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| 70 |
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| 71 | sub lookup_string
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| 72 | {
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| 73 | my ($stringkey) = @_;
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| 74 | return "" unless defined $stringkey;
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| 75 | # Try the language-specific resource bundle first
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| 76 | my $utf8string = $specialresourcebundle{$stringkey};
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| 77 | my $outputencoding = $specialoutputencoding;
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| 78 |
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| 79 | # Try the default resource bundle next
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| 80 | if (!defined($utf8string)) {
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| 81 | # Load the default resource bundle if it is not already loaded
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| 82 | &load_default_resource_bundle() if (!%defaultresourcebundle);
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| 83 |
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| 84 | $utf8string = $defaultresourcebundle{$stringkey};
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| 85 | $outputencoding = $defaultoutputencoding;
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| 86 | }
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| 87 |
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| 88 | # Try the English resource bundle last
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| 89 | if (!defined($utf8string)) {
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| 90 | # Load the English resource bundle if it is not already loaded
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| 91 | &load_english_resource_bundle() if (!%englishresourcebundle);
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| 92 |
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| 93 | $utf8string = $englishresourcebundle{$stringkey};
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| 94 | $outputencoding = $englishoutputencoding;
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| 95 | }
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| 96 |
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| 97 | # No matching string was found, so just return the key
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| 98 | if (!defined($utf8string)) {
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| 99 | return $stringkey;
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| 100 | }
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| 101 |
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| 102 | # Return the string matching the key
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| 103 | return $utf8string if (!defined($outputencoding) || $outputstringsinUTF8
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| 104 | || $outputencoding eq "utf8");
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| 105 |
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| 106 | # If an 8-bit output encoding has been defined, encode the string appropriately
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| 107 | my $encoded=unicode::unicode2singlebyte(&unicode::utf82unicode($utf8string), $outputencoding);
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| 108 |
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| 109 | # If we successfully encoded it, return it
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| 110 | if ($encoded) { return $encoded }
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| 111 |
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| 112 | # Otherwise, we can't convert to the requested encoding. return the utf8?
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| 113 | $specialoutputencoding='utf8';
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| 114 | return $utf8string;
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| 115 | }
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| 116 |
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| 117 |
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| 118 | sub load_language_specific_resource_bundle
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| 119 | {
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| 120 | my $language = shift(@_);
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| 121 |
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| 122 | # Read the specified resource bundle
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| 123 | my $resourcebundlename = "strings_" . $language . ".properties";
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| 124 |
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| 125 | %specialresourcebundle
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| 126 | = &read_resource_bundle_and_extensions($ENV{'GSDLHOME'},"perllib",$resourcebundlename);
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| 127 | return if (!%specialresourcebundle);
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| 128 |
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| 129 | # Read the output encoding to use from the resource bundle
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| 130 | if ($ENV{'GSDLOS'} =~ /windows/) {
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| 131 | $specialoutputencoding = $specialresourcebundle{"{OutputEncoding.windows}"};
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| 132 | }
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| 133 | else {
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| 134 | # see if there is an encoding set in the appropriate locale env var
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| 135 |
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| 136 | foreach my $envvar ('LC_ALL', 'LANG') {
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| 137 | if (!exists $ENV{$envvar}) { next }
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| 138 | my $locale=$ENV{$envvar};
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| 139 | if ($locale !~ /^\w+\.(.+)$/) { next }
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| 140 | my $enc=lc($1);
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| 141 | $enc =~ s/-/_/g;
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| 142 | if ($enc eq 'utf_8') { $enc='utf8' } # normalise to this name
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| 143 | $specialoutputencoding = $enc;
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| 144 | return;
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| 145 | }
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| 146 | $specialoutputencoding = $specialresourcebundle{"{OutputEncoding.unix}"};
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| 147 | }
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| 148 | }
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| 149 |
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| 150 |
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| 151 | sub load_default_resource_bundle
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| 152 | {
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| 153 | # Read the default resource bundle
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| 154 | my $resourcebundlename = "strings.properties";
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| 155 |
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| 156 | %defaultresourcebundle = &read_resource_bundle_and_extensions($ENV{'GSDLHOME'},"perllib",$resourcebundlename);
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| 157 |
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| 158 | if (!%defaultresourcebundle) {
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| 159 | # $! will still have the error value for the last failed syscall
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| 160 | print STDERR "$! $resourcebundlename\n";
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| 161 | # set something so we don't bother trying to load it again
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| 162 | $defaultresourcebundle{0}=undef;
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| 163 | return;
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| 164 | }
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| 165 |
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| 166 | # Read the output encoding to use from the resource bundle
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| 167 | if ($ENV{'GSDLOS'} =~ /windows/) {
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| 168 | $defaultoutputencoding = $defaultresourcebundle{"{OutputEncoding.windows}"};
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| 169 | }
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| 170 | else {
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| 171 | $defaultoutputencoding = $defaultresourcebundle{"{OutputEncoding.unix}"};
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| 172 | }
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| 173 | }
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| 174 |
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| 175 |
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| 176 | sub load_english_resource_bundle
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| 177 | {
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| 178 | # Ensure the English resource bundle hasn't already been loaded
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| 179 | if (%specialresourcebundle && $specialresourcebundle{"{Language.code}"} eq "en") {
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| 180 | %englishresourcebundle = %specialresourcebundle;
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| 181 | $englishoutputencoding = $specialoutputencoding;
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| 182 | }
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| 183 |
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| 184 | if ($defaultresourcebundle{"{Language.code}"} &&
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| 185 | $defaultresourcebundle{"{Language.code}"} eq "en") {
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| 186 | %englishresourcebundle = %defaultresourcebundle;
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| 187 | $englishoutputencoding = $defaultoutputencoding;
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| 188 | }
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| 189 |
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| 190 | # Read the English resource bundle
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| 191 | my $resourcebundlename = "strings_en.properties";
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| 192 |
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| 193 | %englishresourcebundle
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| 194 | = &read_resource_bundle_and_extensions($ENV{'GSDLHOME'},"perllib",$resourcebundlename);
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| 195 | return if (!%englishresourcebundle);
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| 196 |
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| 197 | # Read the output encoding to use from the resource bundle
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| 198 | if ($ENV{'GSDLOS'} =~ /windows/) {
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| 199 | $englishoutputencoding = $englishresourcebundle{"{OutputEncoding.windows}"};
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| 200 | }
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| 201 | else {
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| 202 | $englishoutputencoding = $englishresourcebundle{"{OutputEncoding.unix}"};
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| 203 | }
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| 204 | }
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| 205 |
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| 206 |
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| 207 | sub read_resource_bundle_and_extensions
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| 208 | {
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| 209 | my ($bundle_base,$primary_dir,$resourcename) = @_;
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| 210 |
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| 211 | my $primary_resourcebundlefile
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| 212 | = &util::filename_cat($bundle_base,$primary_dir,$resourcename);
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| 213 |
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| 214 | my $resourcebundle = read_resource_bundle($primary_resourcebundlefile);
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| 215 | return if (!defined $resourcebundle);
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| 216 |
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| 217 | if (defined $ENV{'GSDLEXTS'}) {
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| 218 | my @extensions = split(/:/,$ENV{'GSDLEXTS'});
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| 219 | foreach my $e (@extensions) {
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| 220 | my $ext_base
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| 221 | = &util::filename_cat($bundle_base,"ext",$e);
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| 222 |
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| 223 | my $ext_resourcebundlefile
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| 224 | = &util::filename_cat($ext_base,$primary_dir,$resourcename);
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| 225 |
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| 226 | # can ignore return value (will be same reference to $resourcebundle)
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| 227 | read_resource_bundle($ext_resourcebundlefile,$resourcebundle);
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| 228 | }
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| 229 | }
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| 230 | if (defined $ENV{'GSDL3EXTS'}) {
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| 231 | my @extensions = split(/:/,$ENV{'GSDL3EXTS'});
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| 232 | foreach my $e (@extensions) {
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| 233 | my $ext_base
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| 234 | = &util::filename_cat($ENV{'GSDL3SRCHOME'},"ext",$e);
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| 235 |
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| 236 | my $ext_resourcebundlefile
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| 237 | = &util::filename_cat($ext_base,$primary_dir,$resourcename);
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| 238 |
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| 239 | # can ignore return value (will be same reference to $resourcebundle)
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| 240 | read_resource_bundle($ext_resourcebundlefile,$resourcebundle);
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| 241 | }
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| 242 | }
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| 243 |
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| 244 | return %$resourcebundle;
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| 245 | }
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| 246 |
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| 247 |
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| 248 | sub read_resource_bundle
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| 249 | {
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| 250 | my ($resourcebundlefilepath,$resourcebundle) = @_;
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| 251 |
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| 252 | if (!open(RESOURCE_BUNDLE, "<$resourcebundlefilepath")) {
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| 253 | # When called for the first time (primary resource), $resourcebundle
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| 254 | # is not defined (=undef). If the file does not exist, then we return
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| 255 | # this 'undef' to signal it was not found
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| 256 | # For an extension resource bundle, if it does not exist this
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| 257 | # is not so serious (in fact quite likely) => return what we
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| 258 | # have built up so far
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| 259 |
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| 260 | return $resourcebundle;
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| 261 | }
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| 262 |
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| 263 | if (!defined $resourcebundle) {
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| 264 | # resource files exists, so exect some content to be stored
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| 265 | $resourcebundle = {};
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| 266 | }
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| 267 |
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| 268 | # Load this resource bundle
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| 269 | my @resourcebundlelines = <RESOURCE_BUNDLE>;
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| 270 | close(RESOURCE_BUNDLE);
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| 271 |
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| 272 | # Parse the resource bundle
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| 273 |
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| 274 | foreach my $line (@resourcebundlelines) {
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| 275 | # Remove any trailing whitespace
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| 276 | $line =~ s/(\s*)$//;
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| 277 |
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| 278 | # Ignore comments and empty lines
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| 279 | if ($line !~ /^\#/ && $line ne "") {
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| 280 | # Parse key (everything up to the first colon)
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| 281 | if ($line =~ m/^([^:]+):(.+)$/) {
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| 282 | my $linekey = "{" . $1 . "}";
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| 283 | my $linetext = $2;
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| 284 | $linetext =~ s/(\s*)\#\s+Updated\s+(\d?\d-\D\D\D-\d\d\d\d).*$//i;
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| 285 |
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| 286 | # Map key to text
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| 287 | $resourcebundle->{$linekey} = $linetext;
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| 288 | }
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| 289 | }
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| 290 | }
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| 291 |
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| 292 | return $resourcebundle;
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| 293 | }
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| 294 |
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| 295 |
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| 296 | sub output_strings_in_UTF8
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| 297 | {
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| 298 | $outputstringsinUTF8 = 1;
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| 299 | }
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| 300 |
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| 301 |
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| 302 | sub debug_unicode_string
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| 303 | {
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| 304 | join("",
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| 305 | map { $_ > 255 ? # if wide character...
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| 306 | sprintf("\\x{%04X}", $_) : # \x{...}
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| 307 | chr($_)
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| 308 | } unpack("U*", $_[0])); # unpack Unicode characters
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| 309 | }
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| 310 |
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| 311 |
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| 312 | 1;
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