Fix display of sidebar when previewing page edit. (Thanks, privat)

On second thought, only display a page's personal sidebar when previewing
it, not when editing normally.

IkiWiki/Plugin/editpage.pm

@@ -153,6 +153,7 @@ sub cgi_editpage ($$) {
 			noimageinline => 1,
 			linktext => "FormattingHelp"));
 	
+	my $previewing=0;
 	if ($form->submitted eq "Cancel") {
 		if ($form->field("do") eq "create" && defined $from) {
 			redirect($q, urlto($from, undef, 1));
@@ -166,6 +167,8 @@ sub cgi_editpage ($$) {
 		exit;
 	}
 	elsif ($form->submitted eq "Preview") {
+		$previewing=1;
+
 		my $new=not exists $pagesources{$page};
 		if ($new) {
 			# temporarily record its type
@@ -255,7 +258,7 @@ sub cgi_editpage ($$) {
 			if (! @page_locs) {
 				# hmm, someone else made the page in the
 				# meantime?
-				if ($form->submitted eq "Preview") {
+				if ($previewing) {
 					# let them go ahead with the edit
 					# and resolve the conflict at save
 					# time
@@ -313,7 +316,9 @@ sub cgi_editpage ($$) {
 		}
 		
 		showform($form, \@buttons, $session, $q,
-			forcebaseurl => $baseurl, page => $page);
+			forcebaseurl => $baseurl,
+			($previewing ? (page => $page) : ()),
+		);
 	}
 	else {
 		# save page
@@ -331,7 +336,7 @@ sub cgi_editpage ($$) {
 			$form->field(name => "type", type => 'hidden');
 			$form->title(sprintf(gettext("editing %s"), $page));
 			showform($form, \@buttons, $session, $q,
-				forcebaseurl => $baseurl, page => $page);
+				forcebaseurl => $baseurl);
 			exit;
 		}
 		elsif ($form->field("do") eq "create" && $exists) {
@@ -346,7 +351,7 @@ sub cgi_editpage ($$) {
 				         "\n\n\n".$form->field("editcontent"),
 				force => 1);
 			showform($form, \@buttons, $session, $q,
-				forcebaseurl => $baseurl, page => $page);
+				forcebaseurl => $baseurl);
 			exit;
 		}
 			
@@ -387,7 +392,7 @@ sub cgi_editpage ($$) {
 			$form->field(name => "type", type => 'hidden');
 			$form->title(sprintf(gettext("editing %s"), $page));
 			showform($form, \@buttons, $session, $q,
-				forcebaseurl => $baseurl, page => $page);
+				forcebaseurl => $baseurl);
 			exit;
 		}
 		
@@ -426,7 +431,7 @@ sub cgi_editpage ($$) {
 			$form->field(name => "type", type => 'hidden');
 			$form->title(sprintf(gettext("editing %s"), $page));
 			showform($form, \@buttons, $session, $q,
-				forcebaseurl => $baseurl, page => $page);
+				forcebaseurl => $baseurl);
 		}
 		else {
 			# The trailing question mark tries to avoid broken

debian/changelog

@@ -6,7 +6,7 @@ ikiwiki (3.20100609) unstable; urgency=low
   * Remove example blog tag pages; allow autotag creation to create them
     when used.
   * Fix support for globbing in tagged() pagespecs.
-  * When editing a page, show that page's sidebar. (Thanks, privat)
+  * Fix display of sidebar when previewing page edit. (Thanks, privat)
   * relativedate: Fix problem with localised dates not working.
 
  -- Joey Hess <joeyh@debian.org>  Mon, 31 May 2010 20:44:17 -0400

doc/bugs/misctemplate_does_not_respect_the_current_page___40__if_any__41__.mdwn

@@ -34,9 +34,10 @@ But it causes some nasty bugs for plugins that use the pagetemplate hook. It is
 * -> Problem: the sidebar now shows the foo link (it is the root sidebar!)
 * -> Was expecte : the sidebar displays "world"
 
-> One could argue that the behavior here is right, or wrong. 
+> I think it's a misconception to think that the page editing page is the same
-> Is a page edit page really the same as the page being edited?
+> as the page it's editing. If you were deleting that page, would you expect
-> The next case is more clear.. --[[Joey]]
+> the "are you sure" confirmation page to display the page's sidebar?
+> --[[Joey]]
 
 ### A last example
 
@@ -46,7 +47,12 @@ But it causes some nasty bugs for plugins that use the pagetemplate hook. It is
 * -> Problem: the sidebar still displays the foo link
 * -> Was expected: the sidebar display "goodby"
 
-> I think this is worth fixing. --[[Joey]]
+> In the specific case of previewing, it is indeed a bug that the
+> right sidebar is not displayed. And replacing the regular sidebar 
+> with the one from the previewed page is probably the best we can do..
+> displaying 2 sidebars would be confusing, and the `page.tmpl` can
+> put the sidebar anywhere so we can't just display the preview sidebar
+> next to the rest of the page preview. --[[Joey]]
 
 ## Some superficial hacking
 
@@ -63,5 +69,6 @@ I do not guarantee (I do not even expect) that it is the proper way to solve
 this bug but it may help developers to find and solve the real problem. 
 
 > Oh, it's pretty reasonable. I don't think it breaks anything. :)
+> I modified it a bit, and explicitly made it *not* "fix" the second example.
 > [[done]]
 > --[[Joey]]