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#!/usr/bin/perl
# This plugin adds a "Diff" button to the page edit form.
package IkiWiki::Plugin::editdiff;
use warnings;
use strict;
use IkiWiki 2.00;
use HTML::Entities;
use IPC::Open2;
sub import { #{{{
hook(type => "formbuilder_setup", id => "editdiff",
call => \&formbuilder_setup);
} #}}}
sub diff ($$) { #{{{
my $orig=shift;
my $content=shift;
my $sigpipe=0;
$SIG{PIPE} = sub { $sigpipe=1; };
my $pid = open2(*DIFFOUT, *DIFFIN, 'diff', '-u', $orig, '-');
binmode($_, ':utf8') foreach (*DIFFIN, *DIFFOUT);
print DIFFIN $content;
close DIFFIN;
my $ret;
while (<DIFFOUT>) {
if (defined $ret) {
$ret.=$_;
}
elsif (/^\@\@/) {
$ret=$_;
}
}
close DIFFOUT;
waitpid $pid, 0;
$SIG{PIPE}="default";
return "couldn't run diff\n" if $sigpipe;
return "<pre>".encode_entities($ret)."</pre>";
} #}}}
sub formbuilder_setup { #{{{
my %params=@_;
my $form=$params{form};
my $page=$form->field("page");
return if $form->title ne "editpage"
|| $form->field("do") ne "edit";
$page = IkiWiki::titlepage(IkiWiki::possibly_foolish_untaint($page));
return unless exists $pagesources{$page};
push @{$params{buttons}}, "Diff";
if ($form->submitted eq "Diff") {
my $content=$form->field('editcontent');
$content=~s/\r\n/\n/g;
$content=~s/\r/\n/g;
my $diff = diff(srcfile($pagesources{$page}), $content);
$form->tmpl_param("page_preview", $diff);
}
} #}}}
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