implemented form state saving and retrieval

This is overkill for delete, since it's only used on Cancel. But it will be
crucial for rename, so as to restore any pending edits after renaming a
page.

1 files changed, 14 insertions, 8 deletions

diff --git a/IkiWiki/Plugin/remove.pm b/IkiWiki/Plugin/remove.pm
index 77ddd63ba..3ad90ad6d 100644
--- a/IkiWiki/Plugin/remove.pm
+++ b/IkiWiki/Plugin/remove.pm
@@ -65,15 +65,16 @@ sub formbuilder (@) { #{{{
 
 	if (defined $form->field("do") && $form->field("do") eq "edit" &&
 	    $form->submitted eq "Remove") {
-		# When the remove button is pressed on the edit form,
-		# save the rest of the form state and generate a small
-		# remove confirmation form.
-
-		# TODO save state
-
-
 		my $q=$params{cgi};
 		my $session=$params{session};
+	    	# Save current form state to allow returning to it later
+		# without losing any edits.
+		# (But don't save what button was submitted.)
+		$q->param(-name => "_submit", -value => "");
+		$session->param(postremove => scalar $q->Vars);
+		IkiWiki::cgi_savesession($session);
+
+		# Display a small confirmation form.
 		my ($f, $buttons)=confirmation_form($q, $session);
 		$f->field(name => "page", value => $form->field("page"),
 			force => 1);
@@ -90,7 +91,12 @@ sub sessioncgi ($$) { #{{{
 		my ($form, $buttons)=confirmation_form($q, $session);
 		IkiWiki::decode_form_utf8($form);
 		if ($form->submitted eq 'Cancel') {
-			error("canceled"); # TODO load state
+			# Load saved form state and return to edit form.
+			my $postremove=CGI->new($session->param("postremove"));
+			$session->clear("postremove");
+			IkiWiki::cgi_savesession($session);
+			IkiWiki::cgi($postremove, $session);
+			exit 0;
 		}
 		elsif ($form->submitted eq 'Remove' && $form->validate) {
 			error("removal not yet implemented"); # TODO