--- rat/lonwrapper.pm	2009/10/21 23:29:10	1.35
+++ rat/lonwrapper.pm	2014/05/20 11:47:06	1.47
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Wrapper for external and binary files as standalone resources
 #
-# $Id: lonwrapper.pm,v 1.35 2009/10/21 23:29:10 raeburn Exp $
+# $Id: lonwrapper.pm,v 1.47 2014/05/20 11:47:06 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -31,66 +31,104 @@ package Apache::lonwrapper;
 
 use strict;
 use Apache::Constants qw(:common);
-use Apache::lonnet;
-use Apache::lonxml();
 use Apache::lonenc();
-use Apache::lonmenu();
+use Apache::lonnet;
+use Apache::lonlocal;
+use Apache::loncommon();
+use Apache::lonhtmlcommon();
+use Apache::lonextresedit();
 
 # ================================================================ Main Handler
+sub wrapper {
+    my ($url,$brcrum,$absolute,$is_ext,$is_pdf) = @_;
 
-sub simple_menu {
-#
-# Producing the menu buttons
-#
-    return &Apache::loncommon::start_page('Menu',undef,
-					  {'only_body' => 1,
-					   'bgcolor'   => '#FFFFFF',}).
-	&Apache::lonmenu::menubuttons(1,'web',1).
-	&Apache::loncommon::end_page();
-}
+    my $forcereg;
+    unless ($env{'form.folderpath'}) {
+        $forcereg = 1;
+    }
 
+    my %lt = &Apache::lonlocal::texthash(
+                                          'noif' => 'No iframe support.',
+                                          'show' => 'Show content in pop-up window',
+                                        );
+
+    my $noiframe = &Apache::loncommon::modal_link($url,$lt{'show'},500,400);
+    my $args = {'bgcolor' => '#FFFFFF'};
+    if ($forcereg) {
+        $args->{'force_register'} = $forcereg;
+    }
+    if (ref($brcrum) eq 'ARRAY') {
+        $args->{'bread_crumbs'} = $brcrum;
+    }
+    if ($absolute) {
+        $args->{'use_absolute'} = $absolute; 
+    }
 
-sub wrapper {
-    my ($topurl,$bottomurl) = @_;
+    my $startpage = &Apache::loncommon::start_page('Menu',undef,$args);
+    my $endpage = &Apache::loncommon::end_page();
 
-    my %layout = ('border' => 0);
-    if ($env{'environment.remote'} eq 'off') {
-        if ($env{'environment.icons'} eq 'iconsonly') {
-           $layout{'rows'} = "100,*";
+    if ($env{'browser.mobile'}) {
+        my $output = $startpage;
+        if ($is_pdf) {
+            my $title = $env{'form.title'};
+            if ($title eq '') {
+                unless ($env{'request.enc'}) {
+                    ($title) = ($url =~ m{/([^/]+)$});
+                    $title =~ s/(\?[^\?]+)$//;
+                }
+            }
+            unless ($title eq '') {
+                $output .= $title.'<br />';
+            }
+            $output .= '<a href="'.$url.'">'.&mt('Link to PDF (for mobile devices)').'</a>';
         } else {
-	   $layout{'rows'} = "200,*";
+            $output .= '<div style="overflow:scroll; -webkit-overflow-scrolling:touch;">'."\n".
+                       '<iframe src="$url" height="100%" width="100%" frameborder="0">'."\n".
+                       "$lt{'noif'} $noiframe\n".
+                       "</iframe>\n".
+                       "</div>\n";
+            $output .= '<iframe src="$url" height="100%" width="100%" frameborder="0">'."\n".
+                       "$lt{'noif'} $noiframe\n".
+                       '</iframe>';
         }
+        $output .= $endpage;
+        return $output;
     } else {
-	$layout{'rows'} = "1,*";
-	$topurl = "/adm/rat/empty.html";
+        my $script = &Apache::lonhtmlcommon::scripttag(<<SCRIPT);
+        \$(document).ready( function() {
+            \$(window).unbind('resize').resize(function(){
+                var header;
+                var offset = 5;
+                var height = 0;
+                var hdrtop = 0;
+                if (\$('div.LC_head_subbox:first').length) {
+                    header = \$('div.LC_head_subbox:first');
+                    offset = 9;
+                } else {
+                    if (\$('#LC_breadcrumbs').length) {
+                        header = \$('#LC_breadcrumbs');
+                    }
+                }
+                if (header.length) {
+                    height = header.height();
+                    hdrtop = header.position().top;
+                }
+                var pos = height + hdrtop + offset;
+                \$('.LC_iframecontainer').css('top', pos);
+            });
+        });
+        window.onload = function(){  \$(window).trigger('resize') };
+SCRIPT
+        # javascript will position the iframe if window was resized (or zoomed)
+        return <<ENDFRAME;
+        $startpage
+        $script
+        <div class="LC_iframecontainer">
+            <iframe src="$url">$lt{'noif'} $noiframe</iframe>
+        </div>
+        $endpage
+ENDFRAME
     }
-
-    my $start_page = 
-	&Apache::loncommon::start_page(undef,undef,
-				       {'force_register' => 1,
-					'frameset'       => 1,
-					'add_entries'    => \%layout, });
-
-    my $end_page = 
-	&Apache::loncommon::end_page({'frameset' => 1});
-    
-    foreach my $url ($topurl,$bottomurl) {
-	if ($url !~ /^https?\:/) {
-	    $url = &Apache::lonenc::check_encrypt($url);
-	}
-    }
-#
-# frame-based rendering for graphical interface
-#
-    my $result =<<ENDDOCUMENT;
-$start_page
-test
-<frame src="$topurl" />
-<frame src="$bottomurl" />
-$end_page
-ENDDOCUMENT
-
-    return $result;
 }
 
 sub handler {
@@ -100,45 +138,81 @@ sub handler {
 
     return OK if $r->header_only;
 
-    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
-					    ['wrapperdisplay']);
-    if ($env{'form.wrapperdisplay'} eq 'menu') {
-	$r->print(&simple_menu());
-	return OK;
-    }
-
-    my $orgurl=$r->uri;
-    my $url=$orgurl;
-    $orgurl.=(($orgurl=~/\?/)?'&':'?').$ENV{'QUERY_STRING'};
-    $orgurl.=(($orgurl=~/\?/)?'&':'?').'wrapperdisplay=menu';
-    $url=~s/^\/adm\/wrapper//;
-    my $is_ext = $url =~ m|^/ext/|;
-    $url=~s{^/ext/}{http://};
-    $url=~s|http://https://|https://|;
-    $url=~s|&colon;|:|g;
+    my $url = $r->uri;
+    my ($is_ext,$brcrum,$absolute,$is_pdf);
+
+    for ($url){
+        s|^/adm/wrapper||;
+        $is_ext = $_ =~ s|^/ext/|http://|;         
+        s|http://https://|https://|;
+        s|&colon;|:|g;              
+    }
+
+    if ($url =~ /\.pdf$/i) {
+        $is_pdf = 1;
+    }
+ 
+    if ($is_ext) {
+        my $hostname = $r->hostname();
+        my $lonhost = &Apache::lonnet::host_from_dns($hostname);
+        if ($lonhost) {
+            my $actual = &Apache::lonnet::absolute_url($hostname);
+            my $expected = $Apache::lonnet::protocol{$lonhost}.'://'.$hostname; 
+            unless ($actual eq $expected) {
+                $absolute = $expected;
+            }
+        }
+        &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
+            ['forceedit','register','folderpath','symb','idx','title']);
+        if (($env{'form.forceedit'}) &&
+            (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) &&
+            (($env{'form.folderpath'} =~ /^supplemental/) ||
+             ($env{'form.symb'} =~ /^uploaded/))) {
+            $r->print(
+                &Apache::lonextresedit::display_editor($url,$env{'form.folderpath'},
+                                                       $env{'form.symb'},
+                                                       $env{'form.idx'}));
+            return OK;
+        } elsif ($env{'form.folderpath'} =~ /^supplemental/) {
+            my $crstype = &Apache::loncommon::course_type();
+            my $title = $env{'form.title'};
+            if ($title eq '') {
+                $title = &mt('External Resource');
+            }
+            $brcrum =
+                &Apache::lonhtmlcommon::docs_breadcrumbs(undef,$crstype,undef,$title,1);
+        }
+    }
+
 #
 # Actual URL
 #
-    if ($url=~/\.(problem|exam|quiz|assess|survey|form|library)$/) {
+    if ($url=~/$LONCAPA::assess_re/) {
 #
 # This is uploaded homework
 #
-	$env{'request.state'}='uploaded';
-	&Apache::lonhomework::renderpage($r,$url);
+        $env{'request.state'}='uploaded';
+        &Apache::lonhomework::renderpage($r,$url);
     } else {
 #
 # This is not homework
 #
-	if ($is_ext) {
-	    $ENV{'QUERY_STRING'}=~s/(^|\&)symb=[^\&]*/$1/;
-            $ENV{'QUERY_STRING'} =~ s/\&$//;  
-	}
+        if ($is_ext) {
+            $ENV{'QUERY_STRING'} =~ s/(^|\&)symb=[^\&]*/$1/;
+            $ENV{'QUERY_STRING'} =~ s/\&$//;
+        }
+
         unless ($ENV{'QUERY_STRING'} eq '') {
-	    $url.=(($url=~/\?/)?'&':'?').$ENV{'QUERY_STRING'};
+            $url.=(($url=~/\?/)?'&':'?').$ENV{'QUERY_STRING'};
         }
-	# reappend the query arguments
-	$r->print(&wrapper($orgurl,$url));
+
+        # encrypt url if not external
+        &Apache::lonenc::check_encrypt(\$url) if $url !~ /^https?\:/ ;
+
+        $r->print( wrapper($url,$brcrum,$absolute,$is_ext,$is_pdf) );
+
     } # not just the menu
+    
     return OK;
 } # handler
 
@@ -162,19 +236,53 @@ described at http://www.lon-capa.org.
 
 =over
 
-=item simple_menu()
+=item wrapper($url,$brcrum,$absolute,$is_ext,$is_pdf))
 
-=item wrapper()
+=over
 
-=item handler()
+=item $url
 
-=back
+url to display by including in an iframe within a
+LON-CAPA page which has a standard LON-CAPA inline menu.
 
-=cut
+=item $brcrum
+
+breadcrumbs for unregistered urls
+(i.e., external resources in Supplemental Content).
 
+=item $absolute
 
+contains protocol (http or https) followed by
+the hostname, if menu items in the standard LON-CAPA
+interface created by the call to loncommon::start_page()
+within &wrapper() need to use absolute URLs rather than
+relative URLs.
 
+That will be the case where an external resource has been 
+served from port 80, when the server customarily serves
+requests using Apache/SSL (i.e., port 443). mod_rewrite 
+is used to switch requests for external resources 
+from https:// to http:// where the the URL of the remote site 
+specified in the resource itself is http://.
 
+This is done to avoid default mixed content blocking
+in Firefox 23 and later, when serving from Apache/SSL.
 
+=item $is_ext
 
+true if URL is for an external resource.
+
+=item $is_pdf
+
+true if URL is for a PDF (based on file extension).
+
+=back
+
+Returns markup for the entire page.
+
+=item handler()
+
+=back
+
+=cut