Merge branch 'ready/imgforpdf-and-more'

[git.ikiwiki.info.git] / IkiWiki / Plugin / calendar.pm

diff --git a/IkiWiki/Plugin/calendar.pm b/IkiWiki/Plugin/calendar.pm
index 30e2f26a301d3d24bf71ba0a9d8bece05588ea3c..682bfb6fb8f1e2fb789d5735353f609a163930ee 100644 (file)
--- a/IkiWiki/Plugin/calendar.pm
+++ b/IkiWiki/Plugin/calendar.pm
@@ -13,100 +13,164 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, write to the Free Software
 #
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, write to the Free Software

-# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.

 
 require 5.002;
 package IkiWiki::Plugin::calendar;
 
 use warnings;
 use strict;
 
 require 5.002;
 package IkiWiki::Plugin::calendar;
 
 use warnings;
 use strict;

-use IkiWiki 2.00;
+use IkiWiki 3.00;

 use Time::Local;
 
 use Time::Local;
 

-my %cache;
-my %linkcache;
-my @now=localtime();
+my $time=time;
+my @now=localtime($time);

 
 

-sub import { #{{{
+sub import {
+       hook(type => "getsetup", id => "calendar", call => \&getsetup);
+       hook(type => "needsbuild", id => "calendar", call => \&needsbuild);

        hook(type => "preprocess", id => "calendar", call => \&preprocess);
        hook(type => "preprocess", id => "calendar", call => \&preprocess);

-} #}}}
+}
+
+sub getsetup () {
+       return
+               plugin => {
+                       safe => 1,
+                       rebuild => undef,
+                       section => "widget",
+               },
+               archivebase => {
+                       type => "string",
+                       example => "archives",
+                       description => "base of the archives hierarchy",
+                       safe => 1,
+                       rebuild => 1,
+               },
+               archive_pagespec => {
+                       type => "pagespec",
+                       example => "page(posts/*) and !*/Discussion",
+                       description => "PageSpec of pages to include in the archives; used by ikiwiki-calendar command",
+                       link => 'ikiwiki/PageSpec',
+                       safe => 1,
+                       rebuild => 0,
+               },
+}

 
 

-sub is_leap_year (@) { #{{
+sub is_leap_year (@) {

        my %params=@_;
        return ($params{year} % 4 == 0 && (($params{year} % 100 != 0) || $params{year} % 400 == 0));
        my %params=@_;
        return ($params{year} % 4 == 0 && (($params{year} % 100 != 0) || $params{year} % 400 == 0));

-} #}}}
+}

 
 

-sub month_days { #{{{
+sub month_days {

        my %params=@_;
        my $days_in_month = (31,28,31,30,31,30,31,31,30,31,30,31)[$params{month}-1];
        if ($params{month} == 2 && is_leap_year(%params)) {
                $days_in_month++;
        }
        return $days_in_month;
        my %params=@_;
        my $days_in_month = (31,28,31,30,31,30,31,31,30,31,30,31)[$params{month}-1];
        if ($params{month} == 2 && is_leap_year(%params)) {
                $days_in_month++;
        }
        return $days_in_month;

-} #}}}
+}

 
 

-sub format_month (@) { #{{{
+sub format_month (@) {

        my %params=@_;
 
        my %params=@_;
 

-       my $pagespec = $params{pages};
-       my $year     = $params{year};
-       my $month    = $params{month};
-       my $pmonth   = $params{pmonth};
-       my $nmonth   = $params{nmonth};
-       my $pyear    = $params{pyear};
-       my $nyear    = $params{nyear};
+       my %linkcache;
+       foreach my $p (pagespec_match_list($params{page}, 
+                               "creation_year($params{year}) and creation_month($params{month}) and ($params{pages})",
+                               # add presence dependencies to update
+                               # month calendar when pages are added/removed
+                               deptype => deptype("presence"))) {
+               my $mtime = $IkiWiki::pagectime{$p};
+               my @date  = localtime($mtime);
+               my $mday  = $date[3];
+               my $month = $date[4] + 1;
+               my $year  = $date[5] + 1900;
+               my $mtag  = sprintf("%02d", $month);
+
+               if (! $linkcache{"$year/$mtag/$mday"}) {
+                       $linkcache{"$year/$mtag/$mday"} = [];
+               }
+               push(@{$linkcache{"$year/$mtag/$mday"}}, $p);
+       }
+               
+       my $pmonth = $params{month} - 1;
+       my $nmonth = $params{month} + 1;
+       my $pyear  = $params{year};
+       my $nyear  = $params{year};
+
+       # Adjust for January and December
+       if ($params{month} == 1) {
+               $pmonth = 12;
+               $pyear--;
+       }
+       if ($params{month} == 12) {
+               $nmonth = 1;
+               $nyear++;
+       }
+
+       # Add padding.
+       $pmonth=sprintf("%02d", $pmonth);
+       $nmonth=sprintf("%02d", $nmonth);

 
 

-       my @list;

        my $calendar="\n";
 
        # When did this month start?
        my $calendar="\n";
 
        # When did this month start?

-       my @monthstart = localtime(timelocal(0,0,0,1,$month-1,$year-1900));
+       my @monthstart = localtime(timelocal(0,0,0,1,$params{month}-1,$params{year}-1900));

 
        my $future_dom = 0;
        my $today      = 0;
 
        my $future_dom = 0;
        my $today      = 0;

-       if ($year == $now[5]+1900 && $month == $now[4]+1) {
+       if ($params{year} == $now[5]+1900 && $params{month} == $now[4]+1) {

                $future_dom = $now[3]+1;
                $today      = $now[3];
        }
 
        # Find out month names for this, next, and previous months
                $future_dom = $now[3]+1;
                $today      = $now[3];
        }
 
        # Find out month names for this, next, and previous months

-       my $monthname=POSIX::strftime("%B", @monthstart);
-       my $pmonthname=POSIX::strftime("%B", localtime(timelocal(0,0,0,1,$pmonth-1,$pyear-1900)));
-       my $nmonthname=POSIX::strftime("%B", localtime(timelocal(0,0,0,1,$nmonth-1,$nyear-1900)));
+       my $monthabbrev=strftime_utf8("%b", @monthstart);
+       my $monthname=strftime_utf8("%B", @monthstart);
+       my $pmonthname=strftime_utf8("%B", localtime(timelocal(0,0,0,1,$pmonth-1,$pyear-1900)));
+       my $nmonthname=strftime_utf8("%B", localtime(timelocal(0,0,0,1,$nmonth-1,$nyear-1900)));

 
        my $archivebase = 'archives';
        $archivebase = $config{archivebase} if defined $config{archivebase};
        $archivebase = $params{archivebase} if defined $params{archivebase};
   
        # Calculate URL's for monthly archives.
 
        my $archivebase = 'archives';
        $archivebase = $config{archivebase} if defined $config{archivebase};
        $archivebase = $params{archivebase} if defined $params{archivebase};
   
        # Calculate URL's for monthly archives.

-       my ($url, $purl, $nurl)=("$monthname",'','');
-       if (exists $cache{$pagespec}{"$year/$month"}) {
+       my ($url, $purl, $nurl)=("$monthname $params{year}",'','');
+       if (exists $pagesources{"$archivebase/$params{year}/$params{month}"}) {

                $url = htmllink($params{page}, $params{destpage}, 
                $url = htmllink($params{page}, $params{destpage}, 

-                       "$archivebase/$year/".sprintf("%02d", $month),
-                       linktext => " $monthname ");
+                       "$archivebase/$params{year}/".$params{month},
+                       noimageinline => 1,
+                       linktext => "$monthabbrev $params{year}",
+                       title => $monthname);

        }
        }

-       add_depends($params{page}, "$archivebase/$year/".sprintf("%02d", $month));
-       if (exists $cache{$pagespec}{"$pyear/$pmonth"}) {
+       add_depends($params{page}, "$archivebase/$params{year}/$params{month}",
+               deptype("presence"));
+       if (exists $pagesources{"$archivebase/$pyear/$pmonth"}) {

                $purl = htmllink($params{page}, $params{destpage}, 
                $purl = htmllink($params{page}, $params{destpage}, 

-                       "$archivebase/$pyear/" . sprintf("%02d", $pmonth),
-                       linktext => " $pmonthname ");
+                       "$archivebase/$pyear/$pmonth",
+                       noimageinline => 1,
+                       linktext => "\←",
+                       title => $pmonthname);

        }
        }

-       add_depends($params{page}, "$archivebase/$pyear/".sprintf("%02d", $pmonth));
-       if (exists $cache{$pagespec}{"$nyear/$nmonth"}) {
+       add_depends($params{page}, "$archivebase/$pyear/$pmonth",
+               deptype("presence"));
+       if (exists $pagesources{"$archivebase/$nyear/$nmonth"}) {

                $nurl = htmllink($params{page}, $params{destpage}, 
                $nurl = htmllink($params{page}, $params{destpage}, 

-                       "$archivebase/$nyear/" . sprintf("%02d", $nmonth),
-                       linktext => " $nmonthname ");
+                       "$archivebase/$nyear/$nmonth",
+                       noimageinline => 1,
+                       linktext => "\→",
+                       title => $nmonthname);

        }
        }

-       add_depends($params{page}, "$archivebase/$nyear/".sprintf("%02d", $nmonth));
+       add_depends($params{page}, "$archivebase/$nyear/$nmonth",
+               deptype("presence"));

 
        # Start producing the month calendar
        $calendar=<<EOF;
 <table class="month-calendar">
 
        # Start producing the month calendar
        $calendar=<<EOF;
 <table class="month-calendar">

-       <caption class="month-calendar-head">
-       $purl
-       $url
-       $nurl
-       </caption>
+       <tr>
+       <th class="month-calendar-arrow">$purl</th>
+       <th class="month-calendar-head" colspan="5">$url</th>
+       <th class="month-calendar-arrow">$nurl</th>
+       </tr>

        <tr>
 EOF
 
        <tr>
 EOF
 


@@ -118,12 +182,12 @@ EOF
        my %downame;
        my %dowabbr;
        for my $dow ($week_start_day..$week_start_day+6) {
        my %downame;
        my %dowabbr;
        for my $dow ($week_start_day..$week_start_day+6) {

-               my @day=localtime(timelocal(0,0,0,$start_day++,$month-1,$year-1900));
-               my $downame = POSIX::strftime("%A", @day);
-               my $dowabbr = POSIX::strftime("%a", @day);
+               my @day=localtime(timelocal(0,0,0,$start_day++,$params{month}-1,$params{year}-1900));
+               my $downame = strftime_utf8("%A", @day);
+               my $dowabbr = substr($downame, 0, 1);

                $downame{$dow % 7}=$downame;
                $dowabbr{$dow % 7}=$dowabbr;
                $downame{$dow % 7}=$downame;
                $dowabbr{$dow % 7}=$dowabbr;

-               $calendar.= qq{\t\t<th class="month-calendar-day-head $downame">$dowabbr</th>\n};
+               $calendar.= qq{\t\t<th class="month-calendar-day-head $downame" title="$downame">$dowabbr</th>\n};

        }
 
        $calendar.=<<EOF;
        }
 
        $calendar.=<<EOF;


@@ -139,9 +203,9 @@ EOF
 
        # At this point, either the first is a week_start_day, in which case
        # nothing has been printed, or else we are in the middle of a row.
 
        # At this point, either the first is a week_start_day, in which case
        # nothing has been printed, or else we are in the middle of a row.

-       for (my $day = 1; $day <= month_days(year => $year, month => $month);
+       for (my $day = 1; $day <= month_days(year => $params{year}, month => $params{month});

             $day++, $wday++, $wday %= 7) {
             $day++, $wday++, $wday %= 7) {

-               # At tihs point, on a week_start_day, we close out a row,
+               # At this point, on a week_start_day, we close out a row,

                # and start a new one -- unless it is week_start_day on the
                # first, where we do not close a row -- since none was started.
                if ($wday == $week_start_day) {
                # and start a new one -- unless it is week_start_day on the
                # first, where we do not close a row -- since none was started.
                if ($wday == $week_start_day) {


@@ -150,8 +214,8 @@ EOF
                }
                
                my $tag;
                }
                
                my $tag;

-               my $mtag = sprintf("%02d", $month);
-               if (defined $cache{$pagespec}{"$year/$mtag/$day"}) {
+               my $key="$params{year}/$params{month}/$day";
+               if (defined $linkcache{$key}) {

                        if ($day == $today) {
                                $tag='month-calendar-day-this-day';
                        }
                        if ($day == $today) {
                                $tag='month-calendar-day-this-day';
                        }


@@ -159,10 +223,27 @@ EOF
                                $tag='month-calendar-day-link';
                        }
                        $calendar.=qq{\t\t<td class="$tag $downame{$wday}">};
                                $tag='month-calendar-day-link';
                        }
                        $calendar.=qq{\t\t<td class="$tag $downame{$wday}">};

-                       $calendar.=htmllink($params{page}, $params{destpage}, 
-                                           pagename($linkcache{"$year/$mtag/$day"}),
-                                           "linktext" => "$day");
-                       push @list, pagename($linkcache{"$year/$mtag/$day"});
+                       $calendar.=qq{<div class='popup'>$day<div class='balloon'>};
+                       # Several postings on this page
+                       $calendar.=qq{<ul>};
+                       foreach my $page (@{$linkcache{$key}}) {
+                               $calendar.= qq{\n\t\t\t<li>};
+                               my $title;
+                               if (exists $pagestate{$page}{meta}{title}) {
+                                       $title = "$pagestate{$page}{meta}{title}";
+                               }
+                               else {
+                                       $title = pagetitle(IkiWiki::basename($page));
+                               }
+                               $calendar.=htmllink($params{page}, $params{destpage}, 
+                                       $page,
+                                       noimageinline => 1,
+                                       linktext => $title,
+                                       title => $title);
+                               $calendar.= '</li>';
+                       }
+                       $calendar.=qq{\n\t\t</ul>};
+                       $calendar.=qq{</div></div>};

                        $calendar.=qq{</td>\n};
                }
                else {
                        $calendar.=qq{</td>\n};
                }
                else {


@@ -188,100 +269,108 @@ EOF
 </table>
 EOF
 
 </table>
 EOF
 

-       # Add dependencies to update the calendar whenever pages
-       # matching the pagespec are added or removed.
-       add_depends($params{page}, $params{pages});
-       # Explicitly add all currently linked pages as dependencies, so
-        # that if they are removed, the calendar will be sure to be updated.
-        add_depends($params{page}, join(" or ", @list));
-

        return $calendar;
 }
 
 sub format_year (@) {
        my %params=@_;
        return $calendar;
 }
 
 sub format_year (@) {
        my %params=@_;

-
-       my $pagespec = $params{pages};
-       my $year     = $params{year};
-       my $month    = $params{month};
-       my $pmonth   = $params{pmonth};
-       my $nmonth   = $params{nmonth};
-       my $pyear    = $params{pyear};
-       my $nyear    = $params{nyear};
-
+       
+       my @post_months;
+       foreach my $p (pagespec_match_list($params{page}, 
+                               "creation_year($params{year}) and ($params{pages})",
+                               # add presence dependencies to update
+                               # year calendar's links to months when
+                               # pages are added/removed
+                               deptype => deptype("presence"))) {
+               my $mtime = $IkiWiki::pagectime{$p};
+               my @date  = localtime($mtime);
+               my $month = $date[4] + 1;
+
+               $post_months[$month]++;
+       }
+               

        my $calendar="\n";
        my $calendar="\n";

+       
+       my $pyear = $params{year}  - 1;
+       my $nyear = $params{year}  + 1;

 
 

+       my $thisyear = $now[5]+1900;

        my $future_month = 0;
        my $future_month = 0;

-       $future_month = $now[4]+1 if ($year == $now[5]+1900);
+       $future_month = $now[4]+1 if $params{year} == $thisyear;

 
        my $archivebase = 'archives';
        $archivebase = $config{archivebase} if defined $config{archivebase};
        $archivebase = $params{archivebase} if defined $params{archivebase};
 
        # calculate URL's for previous and next years
 
        my $archivebase = 'archives';
        $archivebase = $config{archivebase} if defined $config{archivebase};
        $archivebase = $params{archivebase} if defined $params{archivebase};
 
        # calculate URL's for previous and next years

-       my ($url, $purl, $nurl)=("$year",'','');
-       if (exists $cache{$pagespec}{"$year"}) {
+       my ($url, $purl, $nurl)=("$params{year}",'','');
+       if (exists $pagesources{"$archivebase/$params{year}"}) {

                $url = htmllink($params{page}, $params{destpage}, 
                $url = htmllink($params{page}, $params{destpage}, 

-                       "$archivebase/$year",
-                       linktext => "$year");
+                       "$archivebase/$params{year}",
+                       noimageinline => 1,
+                       linktext => $params{year},
+                       title => $params{year});

        }
        }

-       add_depends($params{page}, "$archivebase/$year");
-       if (exists $cache{$pagespec}{"$pyear"}) {
+       add_depends($params{page}, "$archivebase/$params{year}", deptype("presence"));
+       if (exists $pagesources{"$archivebase/$pyear"}) {

                $purl = htmllink($params{page}, $params{destpage}, 
                        "$archivebase/$pyear",
                $purl = htmllink($params{page}, $params{destpage}, 
                        "$archivebase/$pyear",

-                       linktext => "\&larr;");
+                       noimageinline => 1,
+                       linktext => "\&larr;",
+                       title => $pyear);

        }
        }

-       add_depends($params{page}, "$archivebase/$pyear");
-       if (exists $cache{$pagespec}{"$nyear"}) {
+       add_depends($params{page}, "$archivebase/$pyear", deptype("presence"));
+       if (exists $pagesources{"$archivebase/$nyear"}) {

                $nurl = htmllink($params{page}, $params{destpage}, 
                        "$archivebase/$nyear",
                $nurl = htmllink($params{page}, $params{destpage}, 
                        "$archivebase/$nyear",

-                       linktext => "\&rarr;");
+                       noimageinline => 1,
+                       linktext => "\&rarr;",
+                       title => $nyear);

        }
        }

-       add_depends($params{page}, "$archivebase/$nyear");
+       add_depends($params{page}, "$archivebase/$nyear", deptype("presence"));

 
        # Start producing the year calendar
 
        # Start producing the year calendar

+       my $m=$params{months_per_row}-2;

        $calendar=<<EOF;
 <table class="year-calendar">
        $calendar=<<EOF;
 <table class="year-calendar">

-       <caption class="year-calendar-head">
-       $purl
-       $url
-       $nurl
-       </caption>
+       <tr>
+       <th class="year-calendar-arrow">$purl</th>
+       <th class="year-calendar-head" colspan="$m">$url</th>
+       <th class="year-calendar-arrow">$nurl</th>
+       </tr>

        <tr>
                <th class="year-calendar-subhead" colspan="$params{months_per_row}">Months</th>
        </tr>
 EOF
 
        <tr>
                <th class="year-calendar-subhead" colspan="$params{months_per_row}">Months</th>
        </tr>
 EOF
 

-       for ($month = 1; $month <= 12; $month++) {
-               my @day=localtime(timelocal(0,0,0,15,$month-1,$year-1900));
+       for (my $month = 1; $month <= 12; $month++) {
+               my @day=localtime(timelocal(0,0,0,15,$month-1,$params{year}-1900));

                my $murl;
                my $murl;

-               my $monthname = POSIX::strftime("%B", @day);
-               my $monthabbr = POSIX::strftime("%b", @day);
+               my $monthname = strftime_utf8("%B", @day);
+               my $monthabbr = strftime_utf8("%b", @day);

                $calendar.=qq{\t<tr>\n}  if ($month % $params{months_per_row} == 1);
                my $tag;
                my $mtag=sprintf("%02d", $month);
                $calendar.=qq{\t<tr>\n}  if ($month % $params{months_per_row} == 1);
                my $tag;
                my $mtag=sprintf("%02d", $month);

-               if ($month == $params{month}) {
-                       if ($cache{$pagespec}{"$year/$mtag"}) {
-                               $tag = 'this_month_link';
-                       }
-                       else {
-                               $tag = 'this_month_nolink';
-                       }
+               if ($month == $params{month} && $thisyear == $params{year}) {
+                       $tag = 'year-calendar-this-month';

                }
                }

-               elsif ($cache{$pagespec}{"$year/$mtag"}) {
-                       $tag = 'month_link';
+               elsif ($pagesources{"$archivebase/$params{year}/$mtag"}) {
+                       $tag = 'year-calendar-month-link';

                } 
                elsif ($future_month && $month >= $future_month) {
                } 
                elsif ($future_month && $month >= $future_month) {

-                       $tag = 'month_future';
+                       $tag = 'year-calendar-month-future';

                } 
                else {
                } 
                else {

-                       $tag = 'month_nolink';
+                       $tag = 'year-calendar-month-nolink';

                }
 
                }
 

-               if ($cache{$pagespec}{"$year/$mtag"}) {
+               if ($pagesources{"$archivebase/$params{year}/$mtag"} &&
+                   $post_months[$mtag]) {

                        $murl = htmllink($params{page}, $params{destpage}, 
                        $murl = htmllink($params{page}, $params{destpage}, 

-                               "$archivebase/$year/$mtag",
-                               linktext => "$monthabbr");
+                               "$archivebase/$params{year}/$mtag",
+                               noimageinline => 1,
+                               linktext => $monthabbr,
+                               title => $monthname);

                        $calendar.=qq{\t<td class="$tag">};
                        $calendar.=$murl;
                        $calendar.=qq{\t</td>\n};
                        $calendar.=qq{\t<td class="$tag">};
                        $calendar.=$murl;
                        $calendar.=qq{\t</td>\n};


@@ -289,7 +378,8 @@ EOF
                else {
                        $calendar.=qq{\t<td class="$tag">$monthabbr</td>\n};
                }
                else {
                        $calendar.=qq{\t<td class="$tag">$monthabbr</td>\n};
                }

-               add_depends($params{page}, "$archivebase/$year/$mtag");
+               add_depends($params{page}, "$archivebase/$params{year}/$mtag",
+                       deptype("presence"));

 
                $calendar.=qq{\t</tr>\n} if ($month % $params{months_per_row} == 0);
        }
 
                $calendar.=qq{\t</tr>\n} if ($month % $params{months_per_row} == 0);
        }


@@ -301,68 +391,124 @@ EOF
        return $calendar;
 }
 
        return $calendar;
 }
 

+sub setnextchange ($$) {
+       my $page=shift;
+       my $timestamp=shift;
+
+       if (! exists $pagestate{$page}{calendar}{nextchange} ||
+           $pagestate{$page}{calendar}{nextchange} > $timestamp) {
+               $pagestate{$page}{calendar}{nextchange}=$timestamp;
+       }
+}
+

 sub preprocess (@) {
        my %params=@_;
 sub preprocess (@) {
        my %params=@_;

+
+       my $thisyear=1900 + $now[5];
+       my $thismonth=1 + $now[4];
+

        $params{pages} = "*"            unless defined $params{pages};
        $params{type}  = "month"        unless defined $params{type};
        $params{pages} = "*"            unless defined $params{pages};
        $params{type}  = "month"        unless defined $params{type};

-       $params{year}  = 1900 + $now[5] unless defined $params{year};
-       $params{month} = sprintf("%02d", $params{month}) if defined  $params{month};
-       $params{month} = 1    + $now[4] unless defined $params{month};

        $params{week_start_day} = 0     unless defined $params{week_start_day};
        $params{months_per_row} = 3     unless defined $params{months_per_row};
        $params{week_start_day} = 0     unless defined $params{week_start_day};
        $params{months_per_row} = 3     unless defined $params{months_per_row};

+       $params{year}  = $thisyear      unless defined $params{year};
+       $params{month} = $thismonth     unless defined $params{month};

 
 

-       # Calculate month names for next month, and previous months
-       my $pmonth = $params{month} - 1;
-       my $nmonth = $params{month} + 1;
-       my $pyear  = $params{year}  - 1;
-       my $nyear  = $params{year}  + 1;
-
-       # Adjust for January and December
-       if ($params{month} == 1) {
-               $pmonth = 12;
-               $pyear--;
+       my $relativeyear=0;
+       if ($params{year} < 1) {
+               $relativeyear=1;
+               $params{year}=$thisyear+$params{year};

        }
        }

-       if ($params{month} == 12) {
-               $nmonth = 1;
-               $nyear++;
+       my $relativemonth=0;
+       if ($params{month} < 1) {
+               $relativemonth=1;
+               my $monthoff=$params{month};
+               $params{month}=($thismonth+$monthoff) % 12;
+               $params{month}=12 if $params{month}==0;
+               my $yearoff=POSIX::ceil(($thismonth-$params{month}) / -12)
+                       - int($monthoff / 12);
+               $params{year}-=$yearoff;

        }
        }

-
-       $params{pmonth}=$pmonth;
-       $params{nmonth}=$nmonth;
-       $params{pyear} =$pyear;
-       $params{nyear} =$nyear;
-
-       my $calendar="\n";
-       my $pagespec=$params{pages};
-       my $page =$params{page};
-
-       if (! defined $cache{$pagespec}) {
-               foreach my $p (keys %pagesources) {
-                       next unless pagespec_match($p, $pagespec);
-                       my $mtime = $IkiWiki::pagectime{$p};
-                       my $src   = $pagesources{$p};
-                       my @date  = localtime($mtime);
-                       my $mday  = $date[3];
-                       my $month = $date[4] + 1;
-                       my $year  = $date[5] + 1900;
-                       my $mtag  = sprintf("%02d", $month);
-
-                       # Only one posting per day is being linked to.
-                       $linkcache{"$year/$mtag/$mday"} = "$src";
-                       $cache{$pagespec}{"$year"}++;
-                       $cache{$pagespec}{"$year/$mtag"}++;
-                       $cache{$pagespec}{"$year/$mtag/$mday"}++;
+       
+       $params{month} = sprintf("%02d", $params{month});
+       
+       if ($params{type} eq 'month' && $params{year} == $thisyear
+           && $params{month} == $thismonth) {
+               # calendar for current month, updates next midnight
+               setnextchange($params{destpage}, ($time
+                       + (60 - $now[0])                # seconds
+                       + (59 - $now[1]) * 60           # minutes
+                       + (23 - $now[2]) * 60 * 60      # hours
+               ));
+       }
+       elsif ($params{type} eq 'month' &&
+              (($params{year} == $thisyear && $params{month} > $thismonth) ||
+               $params{year} > $thisyear)) {
+               # calendar for upcoming month, updates 1st of that month
+               setnextchange($params{destpage},
+                       timelocal(0, 0, 0, 1, $params{month}-1, $params{year}));
+       }
+       elsif (($params{type} eq 'year' && $params{year} == $thisyear) ||
+              $relativemonth) {
+               # Calendar for current year updates 1st of next month.
+               # Any calendar relative to the current month also updates
+               # then.
+               if ($thismonth < 12) {
+                       setnextchange($params{destpage},
+                               timelocal(0, 0, 0, 1, $thismonth+1-1, $params{year}));
+               }
+               else {
+                       setnextchange($params{destpage},
+                               timelocal(0, 0, 0, 1, 1-1, $params{year}+1));

                }
        }
                }
        }

+       elsif ($relativeyear) {
+               # Any calendar relative to the current year updates 1st
+               # of next year.
+               setnextchange($params{destpage},
+                       timelocal(0, 0, 0, 1, 1-1, $thisyear+1));
+       }
+       elsif ($params{type} eq 'year' && $params{year} > $thisyear) {
+               # calendar for upcoming year, updates 1st of that year
+               setnextchange($params{destpage},
+                       timelocal(0, 0, 0, 1, 1-1, $params{year}));
+       }
+       else {
+               # calendar for past month or year, does not need
+               # to update any more
+               delete $pagestate{$params{destpage}}{calendar};
+       }

 
 

-       if ($params{type} =~ /month/i) {
+       my $calendar="";
+       if ($params{type} eq 'month') {

                $calendar=format_month(%params);
        }
                $calendar=format_month(%params);
        }

-       elsif ($params{type} =~ /year/i) {
+       elsif ($params{type} eq 'year') {

                $calendar=format_year(%params);
        }
 
                $calendar=format_year(%params);
        }
 

-       return "\n<div class=\"calendar\">$calendar</div><!-- calendar -->\n";
+       return "\n<div><div class=\"calendar\">$calendar</div></div>\n";
+} #}}
+
+sub needsbuild (@) {
+       my $needsbuild=shift;
+       foreach my $page (keys %pagestate) {
+               if (exists $pagestate{$page}{calendar}{nextchange}) {
+                       if ($pagestate{$page}{calendar}{nextchange} <= $time) {
+                               # force a rebuild so the calendar shows
+                               # the current day
+                               push @$needsbuild, $pagesources{$page};
+                       }
+                       if (exists $pagesources{$page} && 
+                           grep { $_ eq $pagesources{$page} } @$needsbuild) {
+                               # remove state, will be re-added if
+                               # the calendar is still there during the
+                               # rebuild
+                               delete $pagestate{$page}{calendar};
+                       }
+               }
+       }
+       return $needsbuild;

 }
 
 1
 }
 
 1