--- loncom/xml/lonxml.pm	2007/08/17 20:34:31	1.450
+++ loncom/xml/lonxml.pm	2007/09/12 10:58:18	1.460
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # XML Parser Module 
 #
-# $Id: lonxml.pm,v 1.450 2007/08/17 20:34:31 albertel Exp $
+# $Id: lonxml.pm,v 1.460 2007/09/12 10:58:18 foxr Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -135,6 +135,13 @@ $Apache::lonxml::request='';
 $Apache::lonxml::counter=1;
 $Apache::lonxml::counter_changed=0;
 
+# A count of bubble lines needed for a set.. and a check on 
+# whether or not it is ever used too:
+
+$Apache::lonxml::bubble_line_counter         = 1;
+$Apache::lonxml::bubble_line_counter_changed = 0;
+
+
 #internal check on whether to look at style defs
 $Apache::lonxml::usestyle=1;
 
@@ -358,6 +365,9 @@ sub xmlparse {
  }
  &do_registered_ssi();
  if ($Apache::lonxml::counter_changed) { &store_counter() }
+ if ($Apache::lonxml::bubble_line_counter_changed) {
+     &store_bubble_counter();
+ }
 
  &clean_safespace($safeeval);
 
@@ -627,6 +637,7 @@ sub setup_globals {
   $Apache::lonxml::default_homework_loaded=0;
   $Apache::lonxml::usestyle=1;
   &init_counter();
+  &init_bubble_counter();
   @Apache::lonxml::pwd=();
   @Apache::lonxml::extlinks=();
   @script_var_displays=();
@@ -800,6 +811,7 @@ sub init_safespace {
   $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
   $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
   $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
+  $safehole->wrap(\&Apache::loncommon::languages,$safeeval,'&languages');
   $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
   $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
   $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
@@ -908,6 +920,9 @@ sub endredirection {
     }
     pop @Apache::lonxml::outputstack;
 }
+sub in_redirection {
+    return ($Apache::lonxml::redirection > 0)
+}
 
 sub end_tag {
   my ($tagstack,$parstack,$token)=@_;
@@ -1007,6 +1022,115 @@ sub get_all_text_unbalanced {
     return $result
 }
 
+
+=pod
+
+For bubble grading mode and exam bubble printing mode, the tracking of
+the current 'bubble line number' is stored in the %env element
+'form.bubble_line_counter', and is modifed and handled by 
+the following routines.
+
+The value of it is stored in $Apache:lonxml::bubble_line_counter when 
+live and stored back to env after done.
+
+=item &increment_bubble_counter($increment)
+
+Increments the bubble line counter by the optional value
+$increment (defaults to 1).
+
+ 'bad increments' are also treated as an increment of 1.
+('bad' means <=0).
+
+=cut
+
+sub increment_bubble_counter {
+    my ($increment) = @_;
+    if (!defined($increment) || $increment le 0) {
+	$increment = 1;
+    }
+    $Apache::lonxml::bubble_line_counter         += $increment;
+    $Apache::lonxml::bubble_line_counter_changed  = 1;
+}
+=pod
+    
+=item &init_bubble_counter
+
+Initialize the internal counter to the env. variable
+or 1 if we are inconstruction space, or if the env var
+is not defined.
+
+=cut
+
+sub init_bubble_counter {
+    if ($env{'request.state'} eq 'construct') {
+	$Apache::lonxml::bubble_line_counter         = 1;
+	$Apache::lonxml::bubble_line_counter_changed = 1;
+    } elsif (defined($env{'form.bubble_line_counter'})) {
+	$Apache::lonxml::bubble_line_counter         =
+	                                   $env{'form.bubble_line_counter'};
+	$Aapche::lonxml::bubble_line_counter_changed = 0;
+    } else {
+	$Apache::lonxml::bubble_line_counter         = 1;
+	$Apache::lonxml::bubble_line_counter_changed = 1;
+    }
+
+}
+
+=pod
+
+=item store_bubble_counter;
+
+   Store the bubble line counter in its env var.  The changed flag
+    is reset indicating the env is up to date with respect to the
+    local variable.
+=cut
+
+sub store_bubble_counter {
+    &Apache::lonnet::appenv(('form.bubble.counter' => 
+			            $Apache::lonxml::bubble_line_counter));
+    $Apache::lonnet::bubble_line_counter_changed = 0;
+
+    return '';
+}
+
+=pod
+  
+The next set of subs allow a single level of save/restore for the
+bubble_line_counter.
+
+=cut
+
+{
+    my $bubble_counter_state;
+
+    sub clear_bubble_counter {
+	undef($bubble_counter_state);
+	&Apache::lonnet::delenv('form.bubble_line_counter');
+	&Apache::lonxml::init_bubble_counter();
+	&Apache::lonxml::store_bubble_counter();
+    }
+
+    sub remember_bubble_counter {
+	&Apache::lonnet::transfer_profile_to_env(undef,undef, 1);
+	$bubble_counter_state = $env{'form.bubble_line_counter'};
+    }
+
+    sub restore_bubble_counter {
+	if (defined($bubble_counter_state)) {
+	    &Apache::lonnet::appenv(('form.bubble_line_counter' => 
+				                 $bubble_counter_state));
+	}
+    }
+
+    sub get_bubble_counter {
+	if ($Apache::lonxml::bubble_line_counter_changed) {
+	    &store_bubble_counter();
+	}
+	&Apache::lonnet::transfer_profile_to_env(undef, undef, 1);
+	return $env{'form.bubble_line_counter'};
+    }
+}
+
 =pod
 
 For bubble grading mode and exam bubble printing mode, the tracking of
@@ -1037,7 +1161,7 @@ sub increment_counter {
 
 =pod
 
-=item &init_counter($increment);
+=item &init_counter;
 
 Initialize the internal counter environment variable
 
@@ -1081,11 +1205,13 @@ sub store_counter {
 	    &Apache::lonnet::appenv(('form.counter' => $state));
 	}
     }
+
     sub get_problem_counter {
 	if ($Apache::lonxml::counter_changed) { &store_counter() }
 	&Apache::lonnet::transfer_profile_to_env(undef,undef,1);
 	return $env{'form.counter'};
     }
+
 }
 
 sub get_all_text {
@@ -1355,13 +1481,15 @@ sub inserteditinfo {
 #      my $editheader='<a href="#editsection">Edit below</a><hr />';
       my $xml_help = '';
       my $initialize='';
-      my $add_to_onload;
-      if ($filetype eq 'html') {
-	  my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
-	  $initialize=&Apache::lonhtmlcommon::spellheader();
-	  if (!&Apache::lonhtmlcommon::htmlareablocked() &&
-	      &Apache::lonhtmlcommon::htmlareabrowser()) {
-	      $initialize.=(<<FULLPAGE);
+      my $textarea_id = 'filecont';
+      my ($add_to_onload, $add_to_onresize);
+      my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
+      $initialize=&Apache::lonhtmlcommon::spellheader();
+      if ($filetype eq 'html' 
+	  && (!&Apache::lonhtmlcommon::htmlareablocked() &&
+	      &Apache::lonhtmlcommon::htmlareabrowser())) {
+	  $textarea_id .= '_htmlarea';
+	  $initialize.=(<<FULLPAGE);
 <script type="text/javascript">
 $addbuttons
 
@@ -1371,21 +1499,34 @@ $addbuttons
 	var editor=new HTMLArea("filecont",config);
 	editor.registerPlugin(FullPage);
 	editor.generate();
+	setTimeout(
+		   function () {
+		       HTMLArea._addEvents(editor._doc,
+					   ["keypress","mousedown"], unClean);
+		       editor._iframe.id = '$textarea_id';
+		       resize_textarea('$textarea_id','LC_aftertextarea');
+		   },300);
     }
 </script>
 FULLPAGE
-          } else {
-	      $initialize.=(<<FULLPAGE);
+      } else {
+	  $initialize.=(<<FULLPAGE);
 <script type="text/javascript">
 $addbuttons
     function initDocument() {
+	resize_textarea('$textarea_id','LC_aftertextarea');
     }
 </script>
 FULLPAGE
-	  }
-	  $add_to_onload = 'initDocument();';
+      }
+
+      $add_to_onload = 'initDocument();';
+      $add_to_onresize = "resize_textarea('$textarea_id','LC_aftertextarea');";
+
+      if ($filetype eq 'html') {
 	  $xml_help=&Apache::loncommon::helpLatexCheatsheet();
       }
+
       my $cleanbut = '';
 
       my $titledisplay=&display_title();
@@ -1397,27 +1538,31 @@ FULLPAGE
       my $buttons=(<<BUTTONS);
 $cleanbut
 <input type="submit" name="discardview" accesskey="d"  value="$lt{'dv'}" />
-<input type="submit" name="Undo" accesskey="u"  value="$lt{'un'}" /><hr>
+<input type="submit" name="Undo" accesskey="u"  value="$lt{'un'}" /><hr />
 <input type="submit" name="savethisfile" accesskey="s"  value="$lt{'st'}" />
 <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
 BUTTONS
       $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
+      my $textarea_events = &Apache::edit::element_change_detection();
+      my $form_events     = &Apache::edit::form_change_detection();
       my $editfooter=(<<ENDFOOTER);
 $initialize
 <hr />
 <a name="editsection" />
-<form method="post" name="xmledit">
+<form $form_events method="post" name="xmledit">
 $xml_help
 <input type="hidden" name="editmode" value="$lt{'ed'}" />
 $buttons<br />
-<textarea style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
+<textarea $textarea_events style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
+<div id="LC_aftertextarea">
 <br />$buttons
 <br />
-</form>
 $titledisplay
+</div>
+</form>
 </body>
 ENDFOOTER
-      return ($editfooter,$add_to_onload);;
+      return ($editfooter,$add_to_onload,$add_to_onresize);;
 }
 
 sub get_target {
@@ -1513,34 +1658,54 @@ ENDNOTFOUND
 						    ['editmode']);
 	}
 	if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
+	    &Apache::structuretags::reset_problem_globals();
 	    $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
 						'',%mystyle);
-	    undef($Apache::lonhomework::parsing_a_task);
+	    # .html files may contain <problem> or <Task> need to clean
+	    # up if it did
+	    &Apache::structuretags::reset_problem_globals();
+	    &Apache::lonhomework::finished_parsing();
 	    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
 						    ['rawmode']);
 	    if ($env{'form.rawmode'}) { $result = $filecontents; }
+	    if ($filetype eq 'sty') {
+		my $controls =
+		    ($env{'request.state'} eq 'construct') ? &Apache::londefdef::edit_controls()
+		                                           : '';
+		my %options = ('bgcolor' => '#FFFFFF');
+		$result = 
+		    &Apache::loncommon::start_page(undef,undef,\%options).
+		    $controls.
+		    $result.
+		    &Apache::loncommon::end_page();
+	    }
 	}
     }
-    
+
 #
 # Edit action? Insert editing commands
 #
     unless ($env{'request.state'} eq 'published') {
 	if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
 	{
-	    my ($edit_info, $add_to_onload)=
+	    my ($edit_info, $add_to_onload, $add_to_onresize)=
 		&inserteditinfo($filecontents,$filetype);
 
 	    my $displayfile=$request->uri;
 	    $displayfile=~s/^\/[^\/]*//;
 	    my %options = 
 		('add_entries' =>
-		    {'onload'   => $add_to_onload, });
+                   {'onresize' => $add_to_onresize,
+		    'onload'   => $add_to_onload,   });
+
 	    if ($env{'environment.remote'} ne 'off') {
 		$options{'bgcolor'}   = '#FFFFFF';
 		$options{'only_body'} = 1;
 	    }
-	    my $start_page = &Apache::loncommon::start_page(undef,undef,
+	    my $js =
+		&Apache::edit::js_change_detection().
+		&Apache::loncommon::resize_textarea_js();
+	    my $start_page = &Apache::loncommon::start_page(undef,$js,
 							    \%options);
 	    $result=$start_page.
 		&Apache::lonxml::message_location().'<h3>'.
@@ -1599,12 +1764,28 @@ sub show_error_warn_msg {
 }
 
 sub error {
+    my @errors = @_;
+
     $errorcount++;
+
+    if (defined($Apache::inputtags::part)) {
+	if ( @Apache::inputtags::response ) {
+	    push(@errors,
+		 &mt("This error occurred while processing response [_1] in part [_2]",
+		     $Apache::inputtags::response[-1],
+		     $Apache::inputtags::part));
+	} else {
+	    push(@errors,
+		 &mt("This error occurred while processing part [_1]",
+		     $Apache::inputtags::part));
+	}
+    }
+
     if ( &show_error_warn_msg() ) {
 	# If printing in construction space, put the error inside <pre></pre>
 	push(@Apache::lonxml::error_messages,
 	     $Apache::lonxml::warnings_error_header.
-	     "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
+	     "<b>ERROR:</b>".join("<br />\n",@errors)."<br />\n");
 	$Apache::lonxml::warnings_error_header='';
     } else {
 	my $errormsg;
@@ -1614,7 +1795,10 @@ sub error {
 	    $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
 	}
 	my $host=$Apache::lonnet::perlvar{'lonHostID'};
-	my $msg = join('<br />',(@_,"The error occurred on host <tt>$host</tt>"));
+	push(@errors, "The error occurred on host <tt>$host</tt>");
+
+	my $msg = join('<br />', @errors);
+
 	#notify author
 	&Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
 	#notify course