1 files changed, 53 insertions, 5 deletions

diff --git a/IkiWiki/Plugin/sidebar.pm b/IkiWiki/Plugin/sidebar.pm
index 41812e1c1..c1146b7b4 100644
--- a/IkiWiki/Plugin/sidebar.pm
+++ b/IkiWiki/Plugin/sidebar.pm
@@ -10,6 +10,7 @@ use IkiWiki 3.00;
 
 sub import {
 	hook(type => "getsetup", id => "sidebar", call => \&getsetup);
+	hook(type => "preprocess", id => "sidebar", call => \&preprocess);
 	hook(type => "pagetemplate", id => "sidebar", call => \&pagetemplate);
 }
 
@@ -19,11 +20,50 @@ sub getsetup () {
 			safe => 1,
 			rebuild => 1,
 		},
+		global_sidebars => {
+			type => "boolean",
+			example => 1,
+			description => "show sidebar page on all pages?",
+			safe => 1,
+			rebuild => 1,
+		},
+}
+
+my %pagesidebar;
+
+sub preprocess (@) {
+	my %params=@_;
+
+	my $page=$params{page};
+	return "" unless $page eq $params{destpage};
+	
+	if (! defined $params{content}) {
+		$pagesidebar{$page}=undef;
+	}
+	else {
+		my $file = $pagesources{$page};
+		my $type = pagetype($file);
+
+		$pagesidebar{$page}=
+			IkiWiki::htmlize($page, $page, $type,
+			IkiWiki::linkify($page, $page,
+			IkiWiki::preprocess($page, $page, $params{content})));
+	}
+
+	return "";
 }
 
+my $oldfile;
+my $oldcontent;
+
 sub sidebar_content ($) {
 	my $page=shift;
 	
+	return delete $pagesidebar{$page} if defined $pagesidebar{$page};
+
+	return if ! exists $pagesidebar{$page} && 
+		defined $config{global_sidebars} && ! $config{global_sidebars};
+
 	my $sidebar_page=bestlink($page, "sidebar") || return;
 	my $sidebar_file=$pagesources{$sidebar_page} || return;
 	my $sidebar_type=pagetype($sidebar_file);
@@ -34,7 +74,16 @@ sub sidebar_content ($) {
 		# currently requires a wiki rebuild.
 		add_depends($page, $sidebar_page);
 
-		my $content=readfile(srcfile($sidebar_file));
+		my $content;
+		if (defined $oldfile && $sidebar_file eq $oldfile) {
+			$content=$oldcontent;
+		}
+		else {
+			$content=readfile(srcfile($sidebar_file));
+			$oldcontent=$content;
+			$oldfile=$sidebar_file;
+		}
+
 		return unless length $content;
 		return IkiWiki::htmlize($sidebar_page, $page, $sidebar_type,
 		       IkiWiki::linkify($sidebar_page, $page,
@@ -47,11 +96,10 @@ sub sidebar_content ($) {
 sub pagetemplate (@) {
 	my %params=@_;
 
-	my $page=$params{page};
 	my $template=$params{template};
-	
-	if ($template->query(name => "sidebar")) {
-		my $content=sidebar_content($page);
+	if ($params{destpage} eq $params{page} &&
+	    $template->query(name => "sidebar")) {
+		my $content=sidebar_content($params{destpage});
 		if (defined $content && length $content) {
 		        $template->param(sidebar => $content);
 		}