467 lines
11 KiB
Perl
467 lines
11 KiB
Perl
#!/usr/bin/perl
|
|
# Copyright © 2008-2011 Joey Hess
|
|
# Copyright © 2009-2012 Simon McVittie <http://smcv.pseudorandom.co.uk/>
|
|
# Licensed under the GNU GPL, version 2, or any later version published by the
|
|
# Free Software Foundation
|
|
package IkiWiki::Plugin::trail;
|
|
|
|
use warnings;
|
|
use strict;
|
|
use IkiWiki 3.00;
|
|
|
|
sub import {
|
|
hook(type => "getsetup", id => "trail", call => \&getsetup);
|
|
hook(type => "needsbuild", id => "trail", call => \&needsbuild);
|
|
hook(type => "preprocess", id => "trailoptions", call => \&preprocess_trailoptions, scan => 1);
|
|
hook(type => "preprocess", id => "trailitem", call => \&preprocess_trailitem, scan => 1);
|
|
hook(type => "preprocess", id => "trailitems", call => \&preprocess_trailitems, scan => 1);
|
|
hook(type => "preprocess", id => "traillink", call => \&preprocess_traillink, scan => 1);
|
|
hook(type => "pagetemplate", id => "trail", call => \&pagetemplate);
|
|
hook(type => "build_affected", id => "trail", call => \&build_affected);
|
|
}
|
|
|
|
# Page state
|
|
#
|
|
# If a page $T is a trail, then it can have
|
|
#
|
|
# * $pagestate{$T}{trail}{contents}
|
|
# Reference to an array of lists each containing either:
|
|
# - [pagenames => "page1", "page2"]
|
|
# Those literal pages
|
|
# - [link => "link"]
|
|
# A link specification, pointing to the same page that [[link]]
|
|
# would select
|
|
# - [pagespec => "posts/*", "age", 0]
|
|
# A match by pagespec; the third array element is the sort order
|
|
# and the fourth is whether to reverse sorting
|
|
#
|
|
# * $pagestate{$T}{trail}{sort}
|
|
# A sorting order; if absent or undef, the trail is in the order given
|
|
# by the links that form it
|
|
#
|
|
# * $pagestate{$T}{trail}{circular}
|
|
# True if this trail is circular (i.e. going "next" from the last item is
|
|
# allowed, and takes you back to the first)
|
|
#
|
|
# * $pagestate{$T}{trail}{reverse}
|
|
# True if C<sort> is to be reversed.
|
|
#
|
|
# If a page $M is a member of a trail $T, then it has
|
|
#
|
|
# * $pagestate{$M}{trail}{item}{$T}[0]
|
|
# The page before this one in C<$T> at the last rebuild, or undef.
|
|
#
|
|
# * $pagestate{$M}{trail}{item}{$T}[1]
|
|
# The page after this one in C<$T> at the last refresh, or undef.
|
|
|
|
sub getsetup () {
|
|
return
|
|
plugin => {
|
|
safe => 1,
|
|
rebuild => undef,
|
|
},
|
|
}
|
|
|
|
# Cache of pages' old titles, so we can tell whether they changed
|
|
my %old_trail_titles;
|
|
|
|
sub needsbuild (@) {
|
|
my $needsbuild=shift;
|
|
|
|
foreach my $page (keys %pagestate) {
|
|
if (exists $pagestate{$page}{trail}) {
|
|
if (exists $pagesources{$page} &&
|
|
grep { $_ eq $pagesources{$page} } @$needsbuild) {
|
|
# Remember its title, so we can know whether
|
|
# it changed.
|
|
$old_trail_titles{$page} = title_of($page);
|
|
|
|
# Remove state, it will be re-added
|
|
# if the preprocessor directive is still
|
|
# there during the rebuild. {item} is the
|
|
# only thing that's added for items, not
|
|
# trails, and it's harmless to delete that -
|
|
# the item is being rebuilt anyway.
|
|
delete $pagestate{$page}{trail};
|
|
}
|
|
}
|
|
}
|
|
|
|
return $needsbuild;
|
|
}
|
|
|
|
my $scanned = 0;
|
|
|
|
sub preprocess_trailoptions (@) {
|
|
my %params = @_;
|
|
|
|
if (exists $params{circular}) {
|
|
$pagestate{$params{page}}{trail}{circular} =
|
|
IkiWiki::yesno($params{circular});
|
|
}
|
|
|
|
if (exists $params{sort}) {
|
|
$pagestate{$params{page}}{trail}{sort} = $params{sort};
|
|
}
|
|
|
|
if (exists $params{reverse}) {
|
|
$pagestate{$params{page}}{trail}{reverse} = $params{reverse};
|
|
}
|
|
|
|
return "";
|
|
}
|
|
|
|
sub preprocess_trailitem (@) {
|
|
my $link = shift;
|
|
shift;
|
|
|
|
# avoid collecting everything in the preprocess stage if we already
|
|
# did in the scan stage
|
|
if (defined wantarray) {
|
|
return "" if $scanned;
|
|
}
|
|
else {
|
|
$scanned = 1;
|
|
}
|
|
|
|
my %params = @_;
|
|
my $trail = $params{page};
|
|
|
|
$link = linkpage($link);
|
|
|
|
add_link($params{page}, $link, 'trail');
|
|
push @{$pagestate{$params{page}}{trail}{contents}}, [link => $link];
|
|
|
|
return "";
|
|
}
|
|
|
|
sub preprocess_trailitems (@) {
|
|
my %params = @_;
|
|
|
|
# avoid collecting everything in the preprocess stage if we already
|
|
# did in the scan stage
|
|
if (defined wantarray) {
|
|
return "" if $scanned;
|
|
}
|
|
else {
|
|
$scanned = 1;
|
|
}
|
|
|
|
# trail members from a pagespec ought to be in some sort of order,
|
|
# and path is a nice obvious default
|
|
$params{sort} = 'path' unless exists $params{sort};
|
|
$params{reverse} = 'no' unless exists $params{reverse};
|
|
|
|
if (exists $params{pages}) {
|
|
push @{$pagestate{$params{page}}{trail}{contents}},
|
|
["pagespec" => $params{pages}, $params{sort},
|
|
IkiWiki::yesno($params{reverse})];
|
|
}
|
|
|
|
if (exists $params{pagenames}) {
|
|
push @{$pagestate{$params{page}}{trail}{contents}},
|
|
[pagenames => (map { linkpage $_ } split ' ', $params{pagenames})];
|
|
}
|
|
|
|
return "";
|
|
}
|
|
|
|
sub preprocess_traillink (@) {
|
|
my $link = shift;
|
|
shift;
|
|
|
|
my %params = @_;
|
|
my $trail = $params{page};
|
|
|
|
$link =~ qr{
|
|
(?:
|
|
([^\|]+) # 1: link text
|
|
\| # followed by |
|
|
)? # optional
|
|
|
|
(.+) # 2: page to link to
|
|
}x;
|
|
|
|
my $linktext = $1;
|
|
$link = linkpage($2);
|
|
|
|
add_link($params{page}, $link, 'trail');
|
|
|
|
# avoid collecting everything in the preprocess stage if we already
|
|
# did in the scan stage
|
|
my $already;
|
|
if (defined wantarray) {
|
|
$already = $scanned;
|
|
}
|
|
else {
|
|
$scanned = 1;
|
|
}
|
|
|
|
push @{$pagestate{$params{page}}{trail}{contents}}, [link => $link] unless $already;
|
|
|
|
if (defined $linktext) {
|
|
$linktext = pagetitle($linktext);
|
|
}
|
|
|
|
if (exists $params{text}) {
|
|
$linktext = $params{text};
|
|
}
|
|
|
|
if (defined $linktext) {
|
|
return htmllink($trail, $params{destpage},
|
|
$link, linktext => $linktext);
|
|
}
|
|
|
|
return htmllink($trail, $params{destpage}, $link);
|
|
}
|
|
|
|
# trail => [member1, member2]
|
|
my %trail_to_members;
|
|
# member => { trail => [prev, next] }
|
|
# e.g. if %trail_to_members = (
|
|
# trail1 => ["member1", "member2"],
|
|
# trail2 => ["member0", "member1"],
|
|
# )
|
|
#
|
|
# then $member_to_trails{member1} = {
|
|
# trail1 => [undef, "member2"],
|
|
# trail2 => ["member0", undef],
|
|
# }
|
|
my %member_to_trails;
|
|
|
|
# member => 1
|
|
my %rebuild_trail_members;
|
|
|
|
sub trails_differ {
|
|
my ($old, $new) = @_;
|
|
|
|
foreach my $trail (keys %$old) {
|
|
if (! exists $new->{$trail}) {
|
|
return 1;
|
|
}
|
|
|
|
if (exists $old_trail_titles{$trail} &&
|
|
title_of($trail) ne $old_trail_titles{$trail}) {
|
|
return 1;
|
|
}
|
|
|
|
my ($old_p, $old_n) = @{$old->{$trail}};
|
|
my ($new_p, $new_n) = @{$new->{$trail}};
|
|
$old_p = "" unless defined $old_p;
|
|
$old_n = "" unless defined $old_n;
|
|
$new_p = "" unless defined $new_p;
|
|
$new_n = "" unless defined $new_n;
|
|
if ($old_p ne $new_p) {
|
|
return 1;
|
|
}
|
|
|
|
if (exists $old_trail_titles{$old_p} &&
|
|
title_of($old_p) ne $old_trail_titles{$old_p}) {
|
|
return 1;
|
|
}
|
|
|
|
if ($old_n ne $new_n) {
|
|
return 1;
|
|
}
|
|
|
|
if (exists $old_trail_titles{$old_n} &&
|
|
title_of($old_n) ne $old_trail_titles{$old_n}) {
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
foreach my $trail (keys %$new) {
|
|
if (! exists $old->{$trail}) {
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
my $done_prerender = 0;
|
|
|
|
sub prerender {
|
|
return if $done_prerender;
|
|
|
|
%trail_to_members = ();
|
|
%member_to_trails = ();
|
|
|
|
foreach my $trail (keys %pagestate) {
|
|
next unless exists $pagestate{$trail}{trail}{contents};
|
|
|
|
my $members = [];
|
|
my @contents = @{$pagestate{$trail}{trail}{contents}};
|
|
|
|
foreach my $c (@contents) {
|
|
if ($c->[0] eq 'pagespec') {
|
|
push @$members, pagespec_match_list($trail,
|
|
$c->[1], sort => $c->[2],
|
|
reverse => $c->[3]);
|
|
}
|
|
elsif ($c->[0] eq 'pagenames') {
|
|
my @pagenames = @$c;
|
|
shift @pagenames;
|
|
foreach my $page (@pagenames) {
|
|
if (exists $pagesources{$page}) {
|
|
push @$members, $page;
|
|
}
|
|
else {
|
|
# rebuild trail if it turns up
|
|
add_depends($trail, $page, deptype("presence"));
|
|
}
|
|
}
|
|
}
|
|
elsif ($c->[0] eq 'link') {
|
|
my $best = bestlink($trail, $c->[1]);
|
|
push @$members, $best if length $best;
|
|
}
|
|
}
|
|
|
|
if (defined $pagestate{$trail}{trail}{sort}) {
|
|
@$members = IkiWiki::sort_pages(
|
|
$pagestate{$trail}{trail}{sort},
|
|
$members);
|
|
}
|
|
|
|
if (IkiWiki::yesno $pagestate{$trail}{trail}{reverse}) {
|
|
@$members = reverse @$members;
|
|
}
|
|
|
|
# uniquify
|
|
my %seen;
|
|
my @tmp;
|
|
foreach my $member (@$members) {
|
|
push @tmp, $member unless $seen{$member};
|
|
$seen{$member} = 1;
|
|
}
|
|
$members = [@tmp];
|
|
|
|
for (my $i = 0; $i <= $#$members; $i++) {
|
|
my $member = $members->[$i];
|
|
my $prev;
|
|
$prev = $members->[$i - 1] if $i > 0;
|
|
my $next = $members->[$i + 1];
|
|
|
|
$member_to_trails{$member}{$trail} = [$prev, $next];
|
|
}
|
|
|
|
if ((scalar @$members) > 1 && $pagestate{$trail}{trail}{circular}) {
|
|
$member_to_trails{$members->[0]}{$trail}[0] = $members->[$#$members];
|
|
$member_to_trails{$members->[$#$members]}{$trail}[1] = $members->[0];
|
|
}
|
|
|
|
$trail_to_members{$trail} = $members;
|
|
}
|
|
|
|
foreach my $member (keys %pagestate) {
|
|
if (exists $pagestate{$member}{trail}{item} &&
|
|
! exists $member_to_trails{$member}) {
|
|
$rebuild_trail_members{$member} = 1;
|
|
delete $pagestate{$member}{trail}{item};
|
|
}
|
|
}
|
|
|
|
foreach my $member (keys %member_to_trails) {
|
|
if (! exists $pagestate{$member}{trail}{item}) {
|
|
$rebuild_trail_members{$member} = 1;
|
|
}
|
|
else {
|
|
if (trails_differ($pagestate{$member}{trail}{item},
|
|
$member_to_trails{$member})) {
|
|
$rebuild_trail_members{$member} = 1;
|
|
}
|
|
}
|
|
|
|
$pagestate{$member}{trail}{item} = $member_to_trails{$member};
|
|
}
|
|
|
|
$done_prerender = 1;
|
|
}
|
|
|
|
sub build_affected {
|
|
my %affected;
|
|
|
|
# In principle we might not have done this yet, although in practice
|
|
# at least the trail itself has probably changed, and its template
|
|
# almost certainly contains TRAILS or TRAILLOOP, triggering our
|
|
# prerender as a side-effect.
|
|
prerender();
|
|
|
|
foreach my $member (keys %rebuild_trail_members) {
|
|
$affected{$member} = sprintf(gettext("building %s, its previous or next page has changed"), $member);
|
|
}
|
|
|
|
return %affected;
|
|
}
|
|
|
|
sub title_of ($) {
|
|
my $page = shift;
|
|
if (defined ($pagestate{$page}{meta}{title})) {
|
|
return $pagestate{$page}{meta}{title};
|
|
}
|
|
return pagetitle(IkiWiki::basename($page));
|
|
}
|
|
|
|
my $recursive = 0;
|
|
|
|
sub pagetemplate (@) {
|
|
my %params = @_;
|
|
my $page = $params{page};
|
|
my $template = $params{template};
|
|
|
|
return unless length $page;
|
|
|
|
if ($template->query(name => 'trails') && ! $recursive) {
|
|
prerender();
|
|
|
|
$recursive = 1;
|
|
my $inner = template("trails.tmpl", blind_cache => 1);
|
|
IkiWiki::run_hooks(pagetemplate => sub {
|
|
shift->(%params, template => $inner)
|
|
});
|
|
$template->param(trails => $inner->output);
|
|
$recursive = 0;
|
|
}
|
|
|
|
if ($template->query(name => 'trailloop')) {
|
|
prerender();
|
|
|
|
my @trails;
|
|
|
|
# sort backlinks by page name to have a consistent order
|
|
foreach my $trail (sort keys %{$member_to_trails{$page}}) {
|
|
|
|
my $members = $trail_to_members{$trail};
|
|
my ($prev, $next) = @{$member_to_trails{$page}{$trail}};
|
|
my ($prevurl, $nexturl, $prevtitle, $nexttitle);
|
|
|
|
if (defined $prev) {
|
|
$prevurl = urlto($prev, $page);
|
|
$prevtitle = title_of($prev);
|
|
}
|
|
|
|
if (defined $next) {
|
|
$nexturl = urlto($next, $page);
|
|
$nexttitle = title_of($next);
|
|
}
|
|
|
|
push @trails, {
|
|
prevpage => $prev,
|
|
prevtitle => $prevtitle,
|
|
prevurl => $prevurl,
|
|
nextpage => $next,
|
|
nexttitle => $nexttitle,
|
|
nexturl => $nexturl,
|
|
trailpage => $trail,
|
|
trailtitle => title_of($trail),
|
|
trailurl => urlto($trail, $page),
|
|
};
|
|
}
|
|
|
|
$template->param(trailloop => \@trails);
|
|
}
|
|
}
|
|
|
|
1;
|