| 1 | #!/usr/bin/perl -w
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| 2 |
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| 3 | ###########################################################################
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| 4 | #
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| 5 | # flash_button.pl
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| 6 | # A component of the Greenstone digital library software
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| 7 | # from the New Zealand Digital Library Project at the
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| 8 | # University of Waikato, New Zealand.
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| 9 | #
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| 10 | # Copyright (C) 1999 New Zealand Digital Library Project
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| 11 | #
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| 12 | # This program is free software; you can redistribute it and/or modify
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| 13 | # it under the terms of the GNU General Public License as published by
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| 14 | # the Free Software Foundation; either version 2 of the License, or
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| 15 | # (at your option) any later version.
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| 16 | #
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| 17 | # This program is distributed in the hope that it will be useful,
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| 18 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 20 | # GNU General Public License for more details.
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| 21 | #
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| 22 | # You should have received a copy of the GNU General Public License
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| 23 | # along with this program; if not, write to the Free Software
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| 24 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 25 | #
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| 26 | ###########################################################################
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| 27 |
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| 28 | # flash_button.pl generates all the flashy javascript type
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| 29 | # buttons used by Greenstone
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| 30 | # these are the buttons described in macro files as:
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| 31 | # top_nav_button
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| 32 | # nav_bar_button
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| 33 | # document_button
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| 34 |
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| 35 | BEGIN {
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| 36 | die "GSDLHOME not set\n" unless defined $ENV{'GSDLHOME'};
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| 37 | unshift (@INC, "$ENV{'GSDLHOME'}/perllib");
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| 38 | }
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| 39 |
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| 40 | use Gimp;
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| 41 | use parsargv;
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| 42 | use util;
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| 43 |
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| 44 | # set trace level to watch functions as they are executed
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| 45 | #Gimp::set_trace(TRACE_ALL);
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| 46 | #Gimp::set_trace(TRACE_CALL);
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| 47 |
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| 48 | my $gsdl_yellow = "#D2B464";
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| 49 | my $black = "#000000";
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| 50 |
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| 51 | my ($cfg_file, $width, $height, $text, $filenamestem, $fixed_width,
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| 52 | $width_space, $whitespace, $dont_center, $bgcolor, $fontcolor,
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| 53 | $fontsize, $fontname, $fontweight, $fontslant, $fontwidth,
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| 54 | $fontspacing, $image_dir);
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| 55 |
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| 56 | sub print_usage {
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| 57 | print STDERR "\n usage: $0 [options]\n\n";
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| 58 | print STDERR " options:\n";
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| 59 | print STDERR " -cfg_file file configuration file containing one or more\n";
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| 60 | print STDERR " sets of the following options - use to create\n";
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| 61 | print STDERR " batches of images\n";
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| 62 | print STDERR " -image_dir directory directory to create images in [`pwd`]\n";
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| 63 | print STDERR " this should be full path to existing directory\n";
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| 64 | print STDERR " -width number width of button [65]\n";
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| 65 | print STDERR " -height number height of button [30]\n";
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| 66 | print STDERR " -text string button text\n";
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| 67 | print STDERR " -filenamestem string filename - two images will be produced -\n";
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| 68 | print STDERR " filenamestemon.gif and filenamestemof.gif\n";
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| 69 | print STDERR " -fixed_width fix width of image - if this isn't set\n";
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| 70 | print STDERR " image will be cropped with with width_space\n";
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| 71 | print STDERR " space at each side of text\n";
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| 72 | print STDERR " -width_space number width in pixels of blank space to leave at left\n";
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| 73 | print STDERR " and right edges of text [1]\n";
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| 74 | print STDERR " -whitespace add 1 pixel of white space at left and right edges\n";
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| 75 | print STDERR " of image\n";
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| 76 | print STDERR " -dont_center don't center text horizontally (only applicable if\n";
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| 77 | print STDERR " image is fixed width\n";
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| 78 | print STDERR " -bgcolor hex_value background color of button [$gsdl_yellow]\n";
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| 79 | print STDERR " -fontcolor hex_value text color [$black]\n";
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| 80 | print STDERR " -fontsize number font point size [10]\n";
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| 81 | print STDERR " -fontname string [lucida]\n";
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| 82 | print STDERR " -fontweight string [medium]\n";
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| 83 | print STDERR " -fontslant [r]\n";
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| 84 | print STDERR " -fontwidth [*]\n";
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| 85 | print STDERR " -fontspacing [*]\n\n";
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| 86 | }
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| 87 |
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| 88 | sub reset_options {
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| 89 | $image_dir = "./";
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| 90 | $width = 65;
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| 91 | $height = 30;
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| 92 | $text = "";
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| 93 | $filenamestem = "";
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| 94 | $fixed_width = 0;
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| 95 | $width_space = 1;
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| 96 | $whitespace = 0;
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| 97 | $dont_center = 0;
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| 98 | $bgcolor = $gsdl_yellow;
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| 99 | $fontcolor = $black;
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| 100 | $fontsize = 10;
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| 101 | $fontname = "lucida";
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| 102 | $fontweight = "medium";
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| 103 | $fontslant = "r";
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| 104 | $fontwidth = "*";
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| 105 | $fontspacing = "*";
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| 106 | }
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| 107 |
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| 108 | sub gsdl_flash_button {
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| 109 |
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| 110 | if (!parsargv::parse(\@ARGV,
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| 111 | 'cfg_file/.*/', \$cfg_file,
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| 112 | 'image_dir/.*/./', \$image_dir,
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| 113 | 'width/^\d+$/65', \$width,
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| 114 | 'height/^\d+$/30', \$height,
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| 115 | 'text/.*/', \$text,
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| 116 | 'filenamestem/.*', \$filenamestem,
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| 117 | 'fixed_width', \$fixed_width,
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| 118 | 'width_space/^\d+$/1', \$width_space,
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| 119 | 'whitespace', \$whitespace,
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| 120 | 'dont_center', \$dont_center,
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| 121 | "bgcolor/#[0-9A-Fa-f]{6}/$gsdl_yellow", \$bgcolor,
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| 122 | "fontcolor/#[0-9A-Fa-f]{6}/$black", \$fontcolor,
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| 123 | 'fontsize/^\d+$/10', \$fontsize,
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| 124 | 'fontname/.*/lucida', \$fontname,
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| 125 | 'fontweight/.*/medium', \$fontweight,
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| 126 | 'fontslant/.*/r', \$fontslant,
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| 127 | 'fontwidth/.*/*', \$fontwidth,
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| 128 | 'fontspacing/.*/*', \$fontspacing)) {
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| 129 | &print_usage();
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| 130 | die "flash_button.pl: incorrect options\n";
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| 131 | }
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| 132 |
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| 133 | # will create wherever gimp was started up from if we don't do this
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| 134 | if ($image_dir eq "./") {
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| 135 | $image_dir = `pwd`;
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| 136 | chomp $image_dir;
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| 137 | }
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| 138 |
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| 139 | # replace any '\n' occurring in text with carriage return
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| 140 | $text =~ s/\\n/\n/gi;
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| 141 |
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| 142 | if ($cfg_file =~ /\w/) {
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| 143 |
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| 144 | open (CONF, $cfg_file) || die "couldn't open cfg_file $cfg_file\n";
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| 145 | while (1) {
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| 146 |
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| 147 | &reset_options ();
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| 148 |
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| 149 | # read image configuration entry
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| 150 | my $status = &read_config_entry (CONF);
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| 151 | if ($filenamestem !~ /\w/) {
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| 152 | if ($status) {last;}
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| 153 | else {next;}
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| 154 | }
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| 155 |
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| 156 | &produce_images (0);
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| 157 | if ($status) {last;}
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| 158 | }
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| 159 |
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| 160 | close CONF;
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| 161 |
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| 162 | } else {
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| 163 |
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| 164 | &produce_images (0);
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| 165 |
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| 166 | }
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| 167 | }
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| 168 |
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| 169 | sub produce_images {
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| 170 | my ($off_img) = @_;
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| 171 |
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| 172 | # create image, set background color etc.
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| 173 | my ($image, $backlayer) = &create_image ($off_img);
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| 174 |
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| 175 | # set the text if there is any
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| 176 | if (length($text)) {
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| 177 |
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| 178 | my $textlayer = gimp_text ($image, $backlayer, 0, 0, $text, 0, 1,
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| 179 | $fontsize, PIXELS, "*", $fontname, $fontweight,
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| 180 | $fontslant, $fontwidth, $fontspacing);
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| 181 |
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| 182 |
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| 183 | my $textwidth = gimp_drawable_width($textlayer);
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| 184 | my $textheight = gimp_drawable_height($textlayer);
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| 185 |
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| 186 | # check that text fits within image
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| 187 | if ($textheight > $height) {
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| 188 | die "'$text' at fontsize of $fontsize pixels does not fit within image\n" .
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| 189 | "$height pixels high. Decrease fontsize or increase image height\n";
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| 190 | }
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| 191 |
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| 192 | my $spacers = $width_space * 2;
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| 193 | $spacers += 2 if $whitespace;
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| 194 |
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| 195 | if (!$fixed_width || $textwidth > $width) {
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| 196 |
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| 197 | if ($fixed_width) {
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| 198 | print STDERR "WARNING (flash_button.pl): '$text' does not fit within $width pixel fixed width ";
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| 199 | print STDERR "image. Image width was increased to ",$textwidth + $spacers, " pixels\n";
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| 200 | }
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| 201 |
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| 202 | $width = $textwidth + $spacers;
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| 203 |
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| 204 | # recreate image in new size
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| 205 | ($image, $backlayer) = &create_image ($off_img);
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| 206 | $textlayer = gimp_text ($image, $backlayer, 0, 0, $text, 0, 1,
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| 207 | $fontsize, PIXELS, "*", $fontname, $fontweight,
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| 208 | $fontslant, $fontwidth, $fontspacing);
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| 209 |
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| 210 | }
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| 211 |
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| 212 | my $y_offset = ($height-$textheight)-int($fontsize/5);
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| 213 | if ($text =~ /[gjpqy]/) {
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| 214 | # descenders - put text at bottom of image, otherwise
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| 215 | # go for fontsize/5 pixels above bottom. This is kind of hacky
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| 216 | # and may need some playing with for different fonts/fontsizes
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| 217 | $y_offset = $height-$textheight;
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| 218 | }
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| 219 |
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| 220 | if ($fixed_width) {
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| 221 | if ($dont_center) {
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| 222 | # don't center text horizontally (start it width_space pixels from left edge)
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| 223 | my $x_offset = $width_space;
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| 224 | $x_offset += 1 if $whitespace;
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| 225 | gimp_layer_set_offsets ($textlayer, $x_offset, $y_offset);
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| 226 | } else {
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| 227 | gimp_layer_set_offsets ($textlayer, ($width-$textwidth)/2, $y_offset);
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| 228 | }
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| 229 | } else {
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| 230 | gimp_layer_set_offsets ($textlayer, $spacers / 2, $y_offset);
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| 231 | }
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| 232 | }
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| 233 |
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| 234 | # add pixel of whitespace to each edge if required
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| 235 | if ($whitespace) {
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| 236 | gimp_rect_select ($image, 0, 0, 1, $height, 0, 0, 0);
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| 237 | gimp_edit_clear ($image, $backlayer);
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| 238 | gimp_selection_none ($image);
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| 239 | gimp_rect_select ($image, $width-1, 0, 1, $height, 0, 0, 0);
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| 240 | gimp_edit_clear ($image, $backlayer);
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| 241 | gimp_selection_none ($image);
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| 242 | }
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| 243 |
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| 244 | # flatten the image
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| 245 | my $finishedlayer = gimp_image_flatten ($image);
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| 246 |
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| 247 | # make indexed colour
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| 248 | gimp_convert_indexed ($image, 0, 256);
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| 249 |
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| 250 | # save image
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| 251 | my $filename = $filenamestem . "on.gif";
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| 252 | $filename = $filenamestem . "of.gif" if $off_img;
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| 253 | $filename = &util::filename_cat ($image_dir, $filename);
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| 254 |
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| 255 | gimp_file_save (RUN_NONINTERACTIVE, $image, $finishedlayer, $filename, $filename);
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| 256 |
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| 257 | &produce_images (1) unless $off_img;
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| 258 | }
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| 259 |
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| 260 | sub create_image {
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| 261 | my ($off_img) = @_;
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| 262 |
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| 263 | # create the image
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| 264 | my $image = gimp_image_new ($width, $height, RGB_IMAGE);
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| 265 |
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| 266 | # background layer
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| 267 | my $backlayer = gimp_layer_new ($image, $width, $height, RGB_IMAGE,
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| 268 | "BGLayer", 100, NORMAL_MODE);
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| 269 |
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| 270 | # add the background layer
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| 271 | gimp_image_add_layer ($image, $backlayer, 0);
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| 272 |
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| 273 | # set colour of background
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| 274 | gimp_palette_set_foreground ($bgcolor);
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| 275 |
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| 276 | # clear the background
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| 277 | gimp_selection_all ($image);
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| 278 | gimp_edit_clear ($image, $backlayer);
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| 279 | gimp_selection_none ($image);
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| 280 |
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| 281 | # create the gradient background
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| 282 | gimp_blend ($image, $backlayer, 0, NORMAL_MODE, LINEAR, 70, 0, REPEAT_NONE, 0, 0, 0, 5, $height-3, 5, 0);
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| 283 |
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| 284 | # adjust lightness of "off" gif
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| 285 | gimp_hue_saturation ($image, $backlayer, 0, 0, 100, 0) if $off_img;
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| 286 |
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| 287 | # set colour of text
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| 288 | gimp_palette_set_foreground ($fontcolor);
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| 289 |
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| 290 | return ($image, $backlayer);
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| 291 | }
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| 292 |
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| 293 | # returns 1 if this is the last entry,
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| 294 | sub read_config_entry {
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| 295 | my ($handle) = @_;
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| 296 |
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| 297 | my $line = "";
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| 298 | while (defined ($line = <$handle>)) {
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| 299 | next unless $line =~ /\w/;
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| 300 | my @line = ();
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| 301 | if ($line =~ /^\-+/) {return 0;}
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| 302 | $line =~ s/^\#.*$//; # remove comments
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| 303 | $line =~ s/\cM|\cJ//g; # remove end-of-line characters
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| 304 | $line =~ s/^\s+//; # remove initial white space
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| 305 | while ($line =~ s/\s*(\"[^\"]*\"|\'[^\']*\'|\S+)\s*//) {
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| 306 | if (defined $1) {
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| 307 | # remove any enclosing quotes
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| 308 | my $entry = $1;
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| 309 | $entry =~ s/^([\"\'])(.*)\1$/$2/;
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| 310 |
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| 311 | # substitute any environment variables
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| 312 | $entry =~ s/\$(\w+)/$ENV{$1}/g;
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| 313 | $entry =~ s/\$\{(\w+)\}/$ENV{$1}/g;
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| 314 |
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| 315 | push (@line, $entry);
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| 316 | } else {
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| 317 | push (@line, "");
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| 318 | }
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| 319 | }
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| 320 | if (scalar (@line) == 2 && defined ${$line[0]}) {
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| 321 | ${$line[0]} = $line[1];
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| 322 | }
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| 323 | }
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| 324 | return 1;
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| 325 | }
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| 326 |
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| 327 | sub query {
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| 328 |
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| 329 | gimp_install_procedure("gsdl_flash_button", "create flashy javascript buttons for gsdl",
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| 330 | "", "Stefan Boddie", "Stefan Boddie", "2000-03-10",
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| 331 | "<Toolbox>/Xtns/gsdl_flash_button", "*", &PROC_EXTENSION,
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| 332 | [[PARAM_INT32, "run_mode", "Interactive, [non-interactive]"]], []);
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| 333 | }
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| 334 |
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| 335 | sub net {
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| 336 | gsdl_flash_button;
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| 337 | }
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| 338 |
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| 339 | exit main;
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