#!/usr/bin/perl # Ikiwiki enhanced image handling plugin # Christian Mock cm@tahina.priv.at 20061002 package IkiWiki::Plugin::img; use warnings; use strict; use IkiWiki 3.00; my %imgdefaults; sub import { hook(type => "getsetup", id => "img", call => \&getsetup); hook(type => "preprocess", id => "img", call => \&preprocess, scan => 1); } sub getsetup () { return plugin => { safe => 1, rebuild => undef, section => "widget", }, } sub preprocess (@) { my ($image) = $_[0] =~ /$config{wiki_file_regexp}/; # untaint my %params=@_; if (! defined $image) { error("bad image filename"); } if (exists $imgdefaults{$params{page}}) { foreach my $key (keys %{$imgdefaults{$params{page}}}) { if (! exists $params{$key}) { $params{$key}=$imgdefaults{$params{page}}->{$key}; } } } if (! exists $params{size}) { $params{size}='full'; } if ($image eq 'defaults') { $imgdefaults{$params{page}} = \%params; return ''; } add_link($params{page}, $image); add_depends($params{page}, $image); # optimisation: detect scan mode, and avoid generating the image if (! defined wantarray) { return; } my $file = bestlink($params{page}, $image); my $srcfile = srcfile($file, 1); if (! length $file || ! defined $srcfile) { return htmllink($params{page}, $params{destpage}, $image); } my $dir = $params{page}; my $base = IkiWiki::basename($file); eval q{use Image::Magick}; error gettext("Image::Magick is not installed") if $@; my $im = Image::Magick->new; my $imglink; my $r = $im->Read($srcfile); error sprintf(gettext("failed to read %s: %s"), $file, $r) if $r; my ($dwidth, $dheight); if ($params{size} ne 'full') { my ($w, $h) = ($params{size} =~ /^(\d*)x(\d*)$/); error sprintf(gettext('wrong size format "%s" (should be WxH)'), $params{size}) unless (defined $w && defined $h && (length $w || length $h)); if ((length $w && $w > $im->Get("width")) || (length $h && $h > $im->Get("height"))) { # resizing larger $imglink = $file; # don't generate larger image, just set display size if (length $w && length $h) { ($dwidth, $dheight)=($w, $h); } # avoid division by zero on 0x0 image elsif ($im->Get("width") == 0 || $im->Get("height") == 0) { ($dwidth, $dheight)=(0, 0); } # calculate unspecified size from the other one, preserving # aspect ratio elsif (length $w) { $dwidth=$w; $dheight=$w / $im->Get("width") * $im->Get("height"); } elsif (length $h) { $dheight=$h; $dwidth=$h / $im->Get("height") * $im->Get("width"); } } else { # resizing smaller my $outfile = "$config{destdir}/$dir/${w}x${h}-$base"; $imglink = "$dir/${w}x${h}-$base"; will_render($params{page}, $imglink); if (-e $outfile && (-M $srcfile >= -M $outfile)) { $im = Image::Magick->new; $r = $im->Read($outfile); error sprintf(gettext("failed to read %s: %s"), $outfile, $r) if $r; $dwidth = $im->Get("width"); $dheight = $im->Get("height"); } else { ($dwidth, $dheight)=($w, $h); $r = $im->Resize(geometry => "${w}x${h}"); error sprintf(gettext("failed to resize: %s"), $r) if $r; # don't actually write file in preview mode if (! $params{preview}) { my @blob = $im->ImageToBlob(); writefile($imglink, $config{destdir}, $blob[0], 1); } else { $imglink = $file; } } } } else { $imglink = $file; $dwidth = $im->Get("width"); $dheight = $im->Get("height"); } if (! defined($dwidth) || ! defined($dheight)) { error sprintf(gettext("failed to determine size of image %s"), $file) } my ($fileurl, $imgurl); if (! $params{preview}) { $fileurl=urlto($file, $params{destpage}); $imgurl=urlto($imglink, $params{destpage}); } else { $fileurl="$config{url}/$file"; $imgurl="$config{url}/$imglink"; } my $imgtag='<img src="'.$imgurl. '" width="'.$dwidth. '" height="'.$dheight.'"'. (exists $params{alt} ? ' alt="'.$params{alt}.'"' : ''). (exists $params{title} ? ' title="'.$params{title}.'"' : ''). (exists $params{class} ? ' class="'.$params{class}.'"' : ''). (exists $params{align} && ! exists $params{caption} ? ' align="'.$params{align}.'"' : ''). (exists $params{id} ? ' id="'.$params{id}.'"' : ''). ' />'; my $link; if (! defined $params{link}) { $link=$fileurl; } elsif ($params{link} =~ /^\w+:\/\//) { $link=$params{link}; } if (defined $link) { $imgtag='<a href="'.$link.'">'.$imgtag.'</a>'; } else { my $b = bestlink($params{page}, $params{link}); if (length $b) { add_depends($params{page}, $b, deptype("presence")); $imgtag=htmllink($params{page}, $params{destpage}, $params{link}, linktext => $imgtag, noimageinline => 1, ); } } if (exists $params{caption}) { return '<table class="img'. (exists $params{align} ? " align-$params{align}" : ""). '">'. '<caption>'.$params{caption}.'</caption>'. '<tr><td>'.$imgtag.'</td></tr>'. '</table>'; } else { return $imgtag; } } 1