+ if (istranslation($params{page})) {
+ return gettext("Can not remove a translation. If the master page is removed, ".
+ "however, its translations will be removed as well.");
+ }
+ return undef;
+}
+
+sub canrename (@) {
+ my %params = @_;
+ my $session = $params{session};
+
+ if (istranslation($params{src})) {
+ my $masterpage = masterpage($params{src});
+ # Tell the difference between:
+ # - a translation being renamed as a consequence of its master page
+ # being renamed, which is allowed
+ # - a user trying to directly rename a translation, which is forbidden
+ # by looking for the master page in the list of to-be-renamed pages we
+ # saved early in the renaming process.
+ my $orig_torename = $session->param("po_orig_torename");
+ unless (grep { $_ eq $masterpage } @{$orig_torename}) {
+ return gettext("Can not rename a translation. If the master page is renamed, ".
+ "however, its translations will be renamed as well.");
+ }
+ }
+ return undef;
+}
+
+# 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};
+}
+
+sub formbuilder_setup (@) {
+ my %params=@_;
+ my $form=$params{form};
+ my $q=$params{cgi};
+
+ return unless defined $form->field("do");
+
+ if ($form->field("do") eq "create") {
+ # Warn the user: new pages must be written in master language.
+ my $template=template("pocreatepage.tmpl");
+ $template->param(LANG => $config{po_master_language}{name});
+ $form->tmpl_param(message => $template->output);
+ }
+ elsif ($form->field("do") eq "edit") {
+ # Remove the rename/remove buttons on slave pages.
+ # This has to be done after the rename/remove plugins have added
+ # their buttons, which is why this hook must be run last.
+ # The canrename/canremove hooks already ensure this is forbidden
+ # at the backend level, so this is only UI sugar.
+ if (istranslation($form->field("page"))) {
+ map {
+ for (my $i = 0; $i < @{$params{buttons}}; $i++) {
+ if (@{$params{buttons}}[$i] eq $_) {
+ delete @{$params{buttons}}[$i];
+ last;
+ }
+ }
+ } qw(Rename Remove);
+ }
+ }
+}
+
+sub formbuilder (@) {
+ my %params=@_;
+ my $form=$params{form};
+ my $q=$params{cgi};
+
+ return unless defined $form->field("do");
+
+ # Do not allow to create pages of type po: they are automatically created.
+ # The main reason to do so is to bypass the "favor the type of linking page
+ # on page creation" logic, which is unsuitable when a broken link is clicked
+ # on a slave (PO) page.
+ # This cannot be done in the formbuilder_setup hook as the list of types is
+ # computed later.
+ if ($form->field("do") eq "create") {
+ foreach my $field ($form->field) {
+ next unless "$field" eq "type";
+ next unless $field->type eq 'select';
+ my $orig_value = $field->value;
+ # remove po from the list of types
+ my @types = grep { $_->[0] ne 'po' } $field->options;
+ $field->options(\@types) if @types;
+ # favor the type of linking page's masterpage
+ if ($orig_value eq 'po') {
+ my ($from, $type);
+ if (defined $form->field('from')) {
+ ($from)=$form->field('from')=~/$config{wiki_file_regexp}/;
+ $from = masterpage($from);
+ }
+ if (defined $from && exists $pagesources{$from}) {
+ $type=pagetype($pagesources{$from});
+ }
+ $type=$config{default_pageext} unless defined $type;
+ $field->value($type) ;
+ }
+ }
+ }
+}
+
+# ,----
+# | Injected functions
+# `----
+
+# Implement po_link_to 'current' and 'negotiated' settings.
+sub mybestlink ($$) {
+ my $page=shift;
+ my $link=shift;
+
+ return $origsubs{'bestlink'}->($page, $link)
+ if defined $config{po_link_to} && $config{po_link_to} eq "default";
+
+ my $res=$origsubs{'bestlink'}->(masterpage($page), $link);
+ my @caller = caller(1);
+ if (length $res
+ && istranslatable($res)
+ && istranslation($page)
+ && !(exists $caller[3] && defined $caller[3]
+ && ($caller[3] eq "IkiWiki::PageSpec::match_link"))) {
+ return $res . "." . lang($page);
+ }
+ return $res;
+}
+
+sub mybeautify_urlpath ($) {
+ my $url=shift;
+
+ my $res=$origsubs{'beautify_urlpath'}->($url);
+ if (defined $config{po_link_to} && $config{po_link_to} eq "negotiated") {
+ $res =~ s!/\Qindex.$config{po_master_language}{code}.$config{htmlext}\E$!/!;
+ $res =~ s!/\Qindex.$config{htmlext}\E$!/!;
+ map {
+ $res =~ s!/\Qindex.$_.$config{htmlext}\E$!/!;
+ } (keys %{$config{po_slave_languages}});
+ }
+ return $res;
+}
+
+sub mytargetpage ($$) {
+ 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.
+ # also avoid doing so when run by cgi_goto, so that the links on recentchanges
+ # page actually lead to the exact page they pretend to.
+ if ($config{po_link_to} eq "negotiated") {
+ my @caller = caller(1);
+ my $use_orig = 0;
+ $use_orig = 1 if (exists $caller[3] && defined $caller[3]
+ && ($caller[3] eq "IkiWiki::cgi_editpage" ||
+ $caller[3] eq "IkiWiki::Plugin::goto::cgi_goto")
+ );
+ inject(name => "IkiWiki::beautify_urlpath", call => $origsubs{'beautify_urlpath'})
+ if $use_orig;
+ my $res = $origsubs{'urlto'}->($to,$from,$absolute);
+ inject(name => "IkiWiki::beautify_urlpath", call => \&mybeautify_urlpath)
+ if $use_orig;
+ return $res;
+ }
+ else {
+ return $origsubs{'urlto'}->($to,$from,$absolute)
+ }
+}
+
+sub mycgiurl (@) {
+ my %params=@_;
+
+ # slave pages have no subpages
+ if (istranslation($params{'from'})) {
+ $params{'from'} = masterpage($params{'from'});
+ }
+ return $origsubs{'cgiurl'}->(%params);
+}
+
+sub myrootpage (@) {
+ my %params=@_;
+
+ my $rootpage;
+ if (exists $params{rootpage}) {
+ $rootpage=$origsubs{'bestlink'}->($params{page}, $params{rootpage});
+ if (!length $rootpage) {
+ $rootpage=$params{rootpage};
+ }
+ }
+ else {
+ $rootpage=masterpage($params{page});
+ }
+ return $rootpage;
+}
+
+# ,----
+# | 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;