+sub needsbuild () { #{{{
+ my $needsbuild=shift;
+
+ # backup @needsbuild content so that change() can know whether
+ # a given master page was rendered because its source file was changed
+ @origneedsbuild=(@$needsbuild);
+
+ flushmemoizecache();
+ buildtranslationscache();
+
+ # make existing translations depend on the corresponding master page
+ foreach my $master (keys %translations) {
+ map add_depends($_, $master), values %{otherlanguages($master)};
+ }
+} #}}}
+
+# Massage the recorded state of internal links so that:
+# - it matches the actually generated links, rather than the links as written
+# in the pages' source
+# - backlinks are consistent in all cases
+sub scan (@) { #{{{
+ my %params=@_;
+ my $page=$params{page};
+ my $content=$params{content};
+
+ return unless UNIVERSAL::can("IkiWiki::Plugin::link", "import");
+
+ if (istranslation($page)) {
+ foreach my $destpage (@{$links{$page}}) {
+ if (istranslatable($destpage)) {
+ # replace one occurence of $destpage in $links{$page}
+ # (we only want to replace the one that was added by
+ # IkiWiki::Plugin::link::scan, other occurences may be
+ # there for other reasons)
+ for (my $i=0; $i<@{$links{$page}}; $i++) {
+ if (@{$links{$page}}[$i] eq $destpage) {
+ @{$links{$page}}[$i] = $destpage . '.' . lang($page);
+ last;
+ }
+ }
+ }
+ }
+ }
+ elsif (! istranslatable($page) && ! istranslation($page)) {
+ foreach my $destpage (@{$links{$page}}) {
+ if (istranslatable($destpage)) {
+ # make sure any destpage's translations has
+ # $page in its backlinks
+ push @{$links{$page}},
+ values %{otherlanguages($destpage)};
+ }
+ }
+ }
+} #}}}
+
+# We use filter to convert PO to the master page's format,
+# since the rest of ikiwiki should not work on PO files.
+sub filter (@) { #{{{
+ my %params = @_;
+
+ my $page = $params{page};
+ my $destpage = $params{destpage};
+ my $content = decode_utf8(encode_utf8($params{content}));
+
+ return $content if ( ! istranslation($page)
+ || alreadyfiltered($page, $destpage) );
+
+ # CRLF line terminators make poor Locale::Po4a feel bad
+ $content=~s/\r\n/\n/g;
+
+ # Implementation notes
+ #
+ # 1. Locale::Po4a reads/writes from/to files, and I'm too lazy
+ # to learn how to disguise a variable as a file.
+ # 2. There are incompatibilities between some File::Temp versions
+ # (including 0.18, bundled with Lenny's perl-modules package)
+ # and others (e.g. 0.20, previously present in the archive as
+ # a standalone package): under certain circumstances, some
+ # return a relative filename, whereas others return an absolute one;
+ # we here use this module in a way that is at least compatible
+ # with 0.18 and 0.20. Beware, hit'n'run refactorers!
+ my $infile = new File::Temp(TEMPLATE => "ikiwiki-po-filter-in.XXXXXXXXXX",
+ DIR => File::Spec->tmpdir,
+ UNLINK => 1)->filename;
+ my $outfile = new File::Temp(TEMPLATE => "ikiwiki-po-filter-out.XXXXXXXXXX",
+ DIR => File::Spec->tmpdir,
+ UNLINK => 1)->filename;
+
+ writefile(basename($infile), File::Spec->tmpdir, $content);
+
+ my $masterfile = srcfile($pagesources{masterpage($page)});
+ my (@pos,@masters);
+ push @pos,$infile;
+ push @masters,$masterfile;
+ my %options = (
+ "markdown" => (pagetype($masterfile) eq 'mdwn') ? 1 : 0,
+ );
+ my $doc=Locale::Po4a::Chooser::new('text',%options);
+ $doc->process(
+ 'po_in_name' => \@pos,
+ 'file_in_name' => \@masters,
+ 'file_in_charset' => 'utf-8',
+ 'file_out_charset' => 'utf-8',
+ ) or error("[po/filter:$page]: failed to translate");
+ $doc->write($outfile) or error("[po/filter:$page] could not write $outfile");
+ $content = readfile($outfile) or error("[po/filter:$page] could not read $outfile");
+
+ # Unlinking should happen automatically, thanks to File::Temp,
+ # but it does not work here, probably because of the way writefile()
+ # and Locale::Po4a::write() work.
+ unlink $infile, $outfile;
+
+ setalreadyfiltered($page, $destpage);
+ return $content;
+} #}}}
+
+sub htmlize (@) { #{{{
+ my %params=@_;
+
+ my $page = $params{page};
+ my $content = $params{content};
+
+ # ignore PO files this plugin did not create
+ return $content unless istranslation($page);
+
+ # force content to be htmlize'd as if it was the same type as the master page
+ return IkiWiki::htmlize($page, $page,
+ pagetype(srcfile($pagesources{masterpage($page)})),
+ $content);
+} #}}}
+
+sub pagetemplate (@) { #{{{
+ my %params=@_;
+ my $page=$params{page};
+ my $destpage=$params{destpage};
+ my $template=$params{template};
+
+ my ($masterpage, $lang) = istranslation($page);
+
+ if (istranslation($page) && $template->query(name => "percenttranslated")) {
+ $template->param(percenttranslated => percenttranslated($page));
+ }
+ if ($template->query(name => "istranslation")) {
+ $template->param(istranslation => scalar istranslation($page));
+ }
+ if ($template->query(name => "istranslatable")) {
+ $template->param(istranslatable => istranslatable($page));
+ }
+ if ($template->query(name => "HOMEPAGEURL")) {
+ $template->param(homepageurl => homepageurl($page));
+ }
+ if ($template->query(name => "otherlanguages")) {
+ $template->param(otherlanguages => [otherlanguagesloop($page)]);
+ map add_depends($page, $_), (values %{otherlanguages($page)});
+ }
+ # Rely on IkiWiki::Render's genpage() to decide wether
+ # a discussion link should appear on $page; this is not
+ # totally accurate, though: some broken links may be generated
+ # when cgiurl is disabled.
+ # This compromise avoids some code duplication, and will probably
+ # prevent future breakage when ikiwiki internals change.
+ # Known limitations are preferred to future random bugs.
+ if ($template->param('discussionlink') && istranslation($page)) {
+ $template->param('discussionlink' => htmllink(
+ $page,
+ $destpage,
+ $masterpage . '/' . gettext("Discussion"),
+ noimageinline => 1,
+ forcesubpage => 0,
+ linktext => gettext("Discussion"),
+ ));
+ }
+ # Remove broken parentlink to ./index.html on home page's translations.
+ # It works because this hook has the "last" parameter set, to ensure it
+ # runs after parentlinks' own pagetemplate hook.
+ if ($template->param('parentlinks')
+ && istranslation($page)
+ && $masterpage eq "index") {
+ $template->param('parentlinks' => []);
+ }
+} # }}}
+
+# Add the renamed page translations to the list of to-be-renamed pages.
+# Save information about master page rename, so that:
+# - our delete hook can ignore the translations not renamed already
+# - our change hook can rename the translations accordingly.
+sub renamepages() { #{{{
+ my $torename=shift;
+ my @torename=@{$torename};
+
+ foreach my $rename (@torename) {
+ next unless istranslatable($rename->{src});
+ my %otherpages=%{otherlanguages($rename->{src})};
+ while (my ($lang, $otherpage) = each %otherpages) {
+ push @{$torename}, {
+ src => $otherpage,
+ srcfile => $pagesources{$otherpage},
+ dest => otherlanguage($rename->{dest}, $lang),
+ destfile => $rename->{dest}.".".$lang.".po",
+ required => 0,
+ };
+ }
+ }
+} #}}}
+
+sub mydelete(@) { #{{{
+ my @deleted=@_;
+
+ map {
+ deletetranslations($_);
+ } grep { istranslatablefile($_) } @deleted;
+} #}}}
+
+sub change(@) { #{{{
+ my @rendered=@_;
+
+ my $updated_po_files=0;
+
+ # Refresh/create POT and PO files as needed.
+ foreach my $file (@rendered) {
+ next unless istranslatablefile($file);
+ my $page=pagename($file);
+ my $masterfile=srcfile($file);
+ my $updated_pot_file=0;
+ # Only refresh Pot file if it does not exist, or if
+ # $pagesources{$page} was changed: don't if only the HTML was
+ # refreshed, e.g. because of a dependency.
+ if ((grep { $_ eq $pagesources{$page} } @origneedsbuild)
+ || ! -e potfile($masterfile)) {
+ refreshpot($masterfile);
+ $updated_pot_file=1;
+ }
+ my @pofiles;
+ map {
+ push @pofiles, $_ if ($updated_pot_file || ! -e $_);
+ } (pofiles($masterfile));
+ if (@pofiles) {
+ refreshpofiles($masterfile, @pofiles);
+ map { IkiWiki::rcs_add($_); } @pofiles if ($config{rcs});
+ $updated_po_files=1;
+ }
+ }
+
+ if ($updated_po_files) {
+ commit_and_refresh(
+ gettext("updated PO files"),
+ "IkiWiki::Plugin::po::change");
+ }
+} #}}}
+
+# As we're previewing or saving a page, the content may have
+# changed, so tell the next filter() invocation it must not be lazy.
+sub editcontent () { #{{{
+ my %params=@_;
+
+ unsetalreadyfiltered($params{page}, $params{page});
+ return $params{content};
+} #}}}
+
+
+# ,----
+# | Injected functions
+# `----
+
+# Implement po_link_to 'current' and 'negotiated' settings.
+sub mybestlink ($$) { #{{{
+ my $page=shift;
+ my $link=shift;
+
+ my $res=$origsubs{'bestlink'}->(masterpage($page), $link);
+ if (length $res
+ && ($config{po_link_to} eq "current" || $config{po_link_to} eq "negotiated")
+ && istranslatable($res)
+ && istranslation($page)) {
+ return $res . "." . lang($page);
+ }
+ return $res;
+} #}}}
+
+sub mybeautify_urlpath ($) { #{{{
+ my $url=shift;
+
+ my $res=$origsubs{'beautify_urlpath'}->($url);
+ if ($config{po_link_to} eq "negotiated") {
+ $res =~ s!/\Qindex.$config{po_master_language}{code}.$config{htmlext}\E$!/!;
+ $res =~ s!/\Qindex.$config{htmlext}\E$!/!;
+ map {
+ $res =~ s!/\Qindex.$_.$config{htmlext}\E$!/!;
+ } (keys %{$config{po_slave_languages}});
+ }
+ return $res;
+} #}}}
+
+sub mytargetpage ($$) { #{{{
+ my $page=shift;
+ my $ext=shift;
+
+ if (istranslation($page) || istranslatable($page)) {
+ my ($masterpage, $lang) = (masterpage($page), lang($page));
+ if (! $config{usedirs} || $masterpage eq 'index') {
+ return $masterpage . "." . $lang . "." . $ext;
+ }
+ else {
+ return $masterpage . "/index." . $lang . "." . $ext;
+ }
+ }
+ return $origsubs{'targetpage'}->($page, $ext);
+} #}}}
+
+sub myurlto ($$;$) { #{{{
+ my $to=shift;
+ my $from=shift;
+ my $absolute=shift;
+
+ # workaround hard-coded /index.$config{htmlext} in IkiWiki::urlto()
+ if (! length $to
+ && $config{po_link_to} eq "current"
+ && istranslatable('index')) {
+ return IkiWiki::beautify_urlpath(IkiWiki::baseurl($from) . "index." . lang($from) . ".$config{htmlext}");
+ }
+ # avoid using our injected beautify_urlpath if run by cgi_editpage,
+ # so that one is redirected to the just-edited page rather than to the
+ # negociated translation; to prevent unnecessary fiddling with caller/inject,
+ # we only do so when our beautify_urlpath would actually do what we want to
+ # avoid, i.e. when po_link_to = negotiated
+ if ($config{po_link_to} eq "negotiated") {
+ my @caller = caller(1);
+ my $run_by_editpage = ($caller[3] eq "IkiWiki::cgi_editpage");
+ inject(name => "IkiWiki::beautify_urlpath", call => $origsubs{'beautify_urlpath'})
+ if $run_by_editpage;
+ my $res = $origsubs{'urlto'}->($to,$from,$absolute);
+ inject(name => "IkiWiki::beautify_urlpath", call => \&mybeautify_urlpath)
+ if $run_by_editpage;
+ return $res;
+ }
+ else {
+ return $origsubs{'urlto'}->($to,$from,$absolute)
+ }
+} #}}}
+
+sub mynicepagetitle ($;$) { #{{{
+ my ($page, $unescaped) = (shift, shift);
+
+ my $res = $origsubs{'nicepagetitle'}->($page, $unescaped);
+ return $res unless istranslation($page);
+ return $res." (".percenttranslated($page).")";
+} #}}}
+
+# ,----
+# | Blackboxes for private data
+# `----
+
+{
+ my %filtered;
+
+ sub alreadyfiltered($$) { #{{{
+ my $page=shift;
+ my $destpage=shift;
+
+ return ( exists $filtered{$page}{$destpage}
+ && $filtered{$page}{$destpage} eq 1 );
+ } #}}}
+
+ sub setalreadyfiltered($$) { #{{{
+ my $page=shift;
+ my $destpage=shift;
+
+ $filtered{$page}{$destpage}=1;
+ } #}}}
+
+ sub unsetalreadyfiltered($$) { #{{{
+ my $page=shift;
+ my $destpage=shift;
+
+ if (exists $filtered{$page}{$destpage}) {
+ delete $filtered{$page}{$destpage};
+ }
+ } #}}}
+
+ sub resetalreadyfiltered() { #{{{
+ undef %filtered;
+ } #}}}
+}
+
+# ,----
+# | Helper functions
+# `----
+
+sub maybe_add_leading_slash ($;$) { #{{{
+ my $str=shift;
+ my $add=shift;
+ $add=1 unless defined $add;
+ return '/' . $str if $add;
+ return $str;
+} #}}}
+
+sub istranslatablefile ($) { #{{{
+ my $file=shift;
+
+ return 0 unless defined $file;
+ return 0 if (defined pagetype($file) && pagetype($file) eq 'po');
+ return 0 if $file =~ /\.pot$/;
+ return 1 if pagespec_match(pagename($file), $config{po_translatable_pages});
+ return;
+} #}}}
+
+sub istranslatable ($) { #{{{
+ my $page=shift;
+
+ $page=~s#^/##;
+ return 1 if istranslatablefile($pagesources{$page});
+ return;
+} #}}}
+
+sub _istranslation ($) { #{{{
+ my $page=shift;
+
+ my $hasleadingslash = ($page=~s#^/##);
+ my $file=$pagesources{$page};
+ return 0 unless (defined $file
+ && defined pagetype($file)
+ && pagetype($file) eq 'po');
+ return 0 if $file =~ /\.pot$/;
+
+ my ($masterpage, $lang) = ($page =~ /(.*)[.]([a-z]{2})$/);
+ return 0 unless (defined $masterpage && defined $lang
+ && length $masterpage && length $lang
+ && defined $pagesources{$masterpage}
+ && defined $config{po_slave_languages}{$lang});
+
+ return (maybe_add_leading_slash($masterpage, $hasleadingslash), $lang)
+ if istranslatable($masterpage);
+} #}}}
+
+sub istranslation ($) { #{{{
+ my $page=shift;
+
+ if (1 < (my ($masterpage, $lang) = _istranslation($page))) {
+ my $hasleadingslash = ($masterpage=~s#^/##);
+ $translations{$masterpage}{$lang}=$page unless exists $translations{$masterpage}{$lang};
+ return (maybe_add_leading_slash($masterpage, $hasleadingslash), $lang);
+ }
+ return;
+} #}}}
+
+sub masterpage ($) { #{{{
+ my $page=shift;
+
+ if ( 1 < (my ($masterpage, $lang) = _istranslation($page))) {
+ return $masterpage;
+ }
+ return $page;
+} #}}}
+
+sub lang ($) { #{{{
+ my $page=shift;
+
+ if (1 < (my ($masterpage, $lang) = _istranslation($page))) {
+ return $lang;
+ }
+ return $config{po_master_language}{code};
+} #}}}
+
+sub islanguagecode ($) { #{{{
+ my $code=shift;
+
+ return ($code =~ /^[a-z]{2}$/);
+} #}}}
+
+sub otherlanguage ($$) { #{{{
+ my $page=shift;
+ my $code=shift;
+
+ return masterpage($page) if $code eq $config{po_master_language}{code};
+ return masterpage($page) . '.' . $code;
+} #}}}
+
+sub otherlanguages ($) { #{{{
+ my $page=shift;
+
+ my %ret;
+ return \%ret unless (istranslation($page) || istranslatable($page));
+ my $curlang=lang($page);
+ foreach my $lang
+ ($config{po_master_language}{code}, keys %{$config{po_slave_languages}}) {
+ next if $lang eq $curlang;
+ $ret{$lang}=otherlanguage($page, $lang);
+ }
+ return \%ret;
+} #}}}
+