loncom/interface/lonnavmaps.pm - diff

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Diff for /loncom/interface/lonnavmaps.pm between versions 1.176 and 1.258

version 1.176, 2003/04/18 13:51:46	version 1.258, 2004/04/13 15:49:42
Line 25	Line 25
#	#
# http://www.lon-capa.org/	# http://www.lon-capa.org/
#	#
# (Page Handler	###
#
# (TeX Content Handler
#
# 05/29/00,05/30 Gerd Kortemeyer)
# 08/30,08/31,09/06,09/14,09/15,09/16,09/19,09/20,09/21,09/23,
# 10/02,10/10,10/14,10/16,10/18,10/19,10/31,11/6,11/14,11/16 Gerd Kortemeyer)
#
# 3/1/1,6/1,17/1,29/1,30/1,2/8,9/21,9/24,9/25 Gerd Kortemeyer
# YEAR=2002
# 1/1 Gerd Kortemeyer
# Oct-Nov Jeremy Bowers
# YEAR=2003
# Jeremy Bowers ... lots of days

package Apache::lonnavmaps;	package Apache::lonnavmaps;

Line 46 use strict;	Line 33 use strict;
use Apache::Constants qw(:common :http);	use Apache::Constants qw(:common :http);
use Apache::loncommon();	use Apache::loncommon();
use Apache::lonmenu();	use Apache::lonmenu();
	use Apache::lonlocal;
use POSIX qw (floor strftime);	use POSIX qw (floor strftime);
	use Data::Dumper; # for debugging, not always used

# symbolic constants	# symbolic constants
sub SYMB { return 1; }	sub SYMB { return 1; }
Line 60 my $resObj = "Apache::lonnavmaps::resour	Line 49 my $resObj = "Apache::lonnavmaps::resour
# Keep these mappings in sync with lonquickgrades, which uses the colors	# Keep these mappings in sync with lonquickgrades, which uses the colors
# instead of the icons.	# instead of the icons.
my %statusIconMap =	my %statusIconMap =
( $resObj->NETWORK_FAILURE => '',	(
$resObj->NOTHING_SET => '',	$resObj->CLOSED => '',
$resObj->CORRECT => 'navmap.correct.gif',	$resObj->OPEN => 'navmap.open.gif',
$resObj->EXCUSED => 'navmap.correct.gif',	$resObj->CORRECT => 'navmap.correct.gif',
$resObj->PAST_DUE_NO_ANSWER => 'navmap.wrong.gif',	$resObj->INCORRECT => 'navmap.wrong.gif',
$resObj->PAST_DUE_ANSWER_LATER => 'navmap.wrong.gif',	$resObj->ATTEMPTED => 'navmap.ellipsis.gif',
$resObj->ANSWER_OPEN => 'navmap.wrong.gif',	$resObj->ERROR => ''
$resObj->OPEN_LATER => '',	);
$resObj->TRIES_LEFT => 'navmap.open.gif',
$resObj->INCORRECT => 'navmap.wrong.gif',
$resObj->OPEN => 'navmap.open.gif',
$resObj->ATTEMPTED => 'navmap.open.gif' );

my %iconAltTags =	my %iconAltTags =
( 'navmap.correct.gif' => 'Correct',	( 'navmap.correct.gif' => 'Correct',
Line 90 my %colormap =	Line 75 my %colormap =
$resObj->TRIES_LEFT => '',	$resObj->TRIES_LEFT => '',
$resObj->INCORRECT => '',	$resObj->INCORRECT => '',
$resObj->OPEN => '',	$resObj->OPEN => '',
$resObj->NOTHING_SET => '' );	$resObj->NOTHING_SET => '',
	$resObj->ATTEMPTED => '',
	$resObj->ANSWER_SUBMITTED => ''
	);
# And a special case in the nav map; what to do when the assignment	# And a special case in the nav map; what to do when the assignment
# is not yet done and due in less then 24 hours	# is not yet done and due in less then 24 hours
my $hurryUpColor = "#FF0000";	my $hurryUpColor = "#FF0000";
Line 106 sub real_handler {	Line 94 sub real_handler {
# Handle header-only request	# Handle header-only request
if ($r->header_only) {	if ($r->header_only) {
if ($ENV{'browser.mathml'}) {	if ($ENV{'browser.mathml'}) {
$r->content_type('text/xml');	&Apache::loncommon::content_type($r,'text/xml');
} else {	} else {
$r->content_type('text/html');	&Apache::loncommon::content_type($r,'text/html');
}	}
$r->send_http_header;	$r->send_http_header;
return OK;	return OK;
Line 116 sub real_handler {	Line 104 sub real_handler {

# Send header, don't cache this page	# Send header, don't cache this page
if ($ENV{'browser.mathml'}) {	if ($ENV{'browser.mathml'}) {
$r->content_type('text/xml');	&Apache::loncommon::content_type($r,'text/xml');
} else {	} else {
$r->content_type('text/html');	&Apache::loncommon::content_type($r,'text/html');
}	}
&Apache::loncommon::no_cache($r);	&Apache::loncommon::no_cache($r);
$r->send_http_header;	$r->send_http_header;

# Create the nav map	# Create the nav map
my $navmap = Apache::lonnavmaps::navmap->new(	my $navmap = Apache::lonnavmaps::navmap->new();
$ENV{"request.course.fn"}.".db",
$ENV{"request.course.fn"}."_parms.db", 1, 1);


if (!defined($navmap)) {	if (!defined($navmap)) {
my $requrl = $r->uri;	my $requrl = $r->uri;
Line 136 sub real_handler {	Line 121 sub real_handler {
}	}

$r->print("<html><head>\n");	$r->print("<html><head>\n");
$r->print("<title>Navigate Course Contents</title>");	$r->print("<title>".&mt('Navigate Course Contents')."</title>");
# ------------------------------------------------------------ Get query string	# ------------------------------------------------------------ Get query string
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['register']);	&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['register']);

Line 156 sub real_handler {	Line 141 sub real_handler {

$r->rflush();	$r->rflush();

# Now that we've displayed some stuff to the user, init the navmap
$navmap->init();

$r->print('<br> ');
$r->rflush();

# Check that it's defined	# Check that it's defined
if (!($navmap->courseMapDefined())) {	if (!($navmap->courseMapDefined())) {
$r->print('<font size="+2" color="red">Coursemap undefined.</font>' .	$r->print('<font size="+2" color="red">Coursemap undefined.</font>' .
Line 169 sub real_handler {	Line 148 sub real_handler {
return OK;	return OK;
}	}

# See if there's only one map in the top-level... if so,	# See if there's only one map in the top-level, if we don't
# automatically display it	# already have a filter... if so, automatically display it
my $iterator = $navmap->getIterator(undef, undef, undef, 0);	# (older code; should use retrieveResources)
my $depth = 1;	if ($ENV{QUERY_STRING} !~ /filter/) {
$iterator->next();	my $iterator = $navmap->getIterator(undef, undef, undef, 0);
my $curRes = $iterator->next();	my $curRes;
my $sequenceCount = 0;	my $sequenceCount = 0;
my $sequenceId;	my $sequenceId;
while ($depth > 0) {	while ($curRes = $iterator->next()) {
if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }	if (ref($curRes) && $curRes->is_sequence()) {
if ($curRes == $iterator->END_MAP()) { $depth--; }	$sequenceCount++;
	$sequenceId = $curRes->map_pc();
if (ref($curRes) && $curRes->is_sequence()) {	}
$sequenceCount++;	}
$sequenceId = $curRes->map_pc();
}	if ($sequenceCount == 1) {
	# The automatic iterator creation in the render call
$curRes = $iterator->next();	# will pick this up. We know the condition because
}	# the defined($ENV{'form.filter'}) also ensures this
	# is a fresh call.
if ($sequenceCount == 1) {	$ENV{'form.filter'} = "$sequenceId";
# The automatic iterator creation in the render call	}
# will pick this up.
$ENV{'form.filter'} = "$sequenceId";
}	}

# renderer call	my $jumpToFirstHomework = 0;
my $render = render({ 'cols' => [0,1,2,3],	# Check to see if the student is jumping to next open, do-able problem
'url' => '/adm/navmaps',	if ($ENV{QUERY_STRING} eq 'jumpToFirstHomework') {
'navmap' => $navmap,	$jumpToFirstHomework = 1;
'suppressNavmap' => 1,	# Find the next homework problem that they can do.
'r' => $r});	my $iterator = $navmap->getIterator(undef, undef, undef, 1);
	my $curRes;
	my $foundDoableProblem = 0;
	my $problemRes;

	while (($curRes = $iterator->next()) && !$foundDoableProblem) {
	if (ref($curRes) && $curRes->is_problem()) {
	my $status = $curRes->status();
	if ($curRes->completable()) {
	$problemRes = $curRes;
	$foundDoableProblem = 1;

	# Pop open all previous maps
	my $stack = $iterator->getStack();
	pop @$stack; # last resource in the stack is the problem
	# itself, which we don't need in the map stack
	my @mapPcs = map {$_->map_pc()} @$stack;
	$ENV{'form.filter'} = join(',', @mapPcs);

	# Mark as both "here" and "jump"
	$ENV{'form.postsymb'} = $curRes->symb();
	}
	}
	}

	# If we found no problems, print a note to that effect.
	if (!$foundDoableProblem) {
	$r->print("<font size='+2'>All homework assignments have been completed.</font><br /><br />");
	}
	} else {
	$r->print("<a href='navmaps?jumpToFirstHomework'>" .
	&mt("Go To My First Homework Problem")."</a>    ");
	}

	my $suppressEmptySequences = 0;
	my $filterFunc = undef;
	my $resource_no_folder_link = 0;

	# Display only due homework.
	my $showOnlyHomework = 0;
	if ($ENV{QUERY_STRING} eq 'showOnlyHomework') {
	$showOnlyHomework = 1;
	$suppressEmptySequences = 1;
	$filterFunc = sub { my $res = shift;
	return $res->completable() \|\| $res->is_map();
	};
	$r->print("<p><font size='+2'>".&mt("Uncompleted Homework")."</font></p>");
	$ENV{'form.filter'} = '';
	$ENV{'form.condition'} = 1;
	$resource_no_folder_link = 1;
	} else {
	$r->print("<a href='navmaps?showOnlyHomework'>" .
	&mt("Show Only Uncompleted Homework")."</a>    ");
	}

	# renderer call
	my $renderArgs = { 'cols' => [0,1,2,3],
	'url' => '/adm/navmaps',
	'navmap' => $navmap,
	'suppressNavmap' => 1,
	'suppressEmptySequences' => $suppressEmptySequences,
	'filterFunc' => $filterFunc,
	'resource_no_folder_link' => $resource_no_folder_link,
	'r' => $r};
	my $render = render($renderArgs);
$navmap->untieHashes();	$navmap->untieHashes();

	# If no resources were printed, print a reassuring message so the
	# user knows there was no error.
	if ($renderArgs->{'counter'} == 0) {
	if ($showOnlyHomework) {
	$r->print("<p><font size='+1'>".&mt("All homework is currently completed").".</font></p>");
	} else { # both jumpToFirstHomework and normal use the same: course must be empty
	$r->print("<p><font size='+1'>This course is empty.</font></p>");
	}
	}

$r->print("</body></html>");	$r->print("</body></html>");
$r->rflush();	$r->rflush();

Line 240 sub getLinkForResource {	Line 290 sub getLinkForResource {

# Check to see if there are any pages in the stack	# Check to see if there are any pages in the stack
foreach $res (@$stack) {	foreach $res (@$stack) {
if (defined($res) && $res->is_page()) {	if (defined($res)) {
return $res->src();	if ($res->is_page()) {
	return $res->src();
	}
	# in case folder was skipped over as "only sequence"
	my ($map,$id,$src)=&Apache::lonnet::decode_symb($res->symb());
	if ($map=~/\.page$/) {
	return &Apache::lonnet::clutter($map).'#'.
	&Apache::lonnet::escape(&Apache::lonnet::declutter($src));
	}
}	}
}	}

Line 256 sub getLinkForResource {	Line 314 sub getLinkForResource {
return $res->src();	return $res->src();
}	}

# Convenience function: This seperates the logic of how to create	# Convenience function: This separates the logic of how to create
# the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",	# the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",
# etc.) into a seperate function. It takes a resource object as the	# etc.) into a separate function. It takes a resource object as the
# first parameter, and the part number of the resource as the second.	# first parameter, and the part number of the resource as the second.
# It's basically a big switch statement on the status of the resource.	# It's basically a big switch statement on the status of the resource.

Line 267 sub getDescription {	Line 325 sub getDescription {
my $part = shift;	my $part = shift;
my $status = $res->status($part);	my $status = $res->status($part);

if ($status == $res->NETWORK_FAILURE) { return ""; }	if ($status == $res->NETWORK_FAILURE) {
	return &mt("Having technical difficulties; please check status later");
	}
if ($status == $res->NOTHING_SET) {	if ($status == $res->NOTHING_SET) {
return "Not currently assigned.";	return &mt("Not currently assigned.");
}	}
if ($status == $res->OPEN_LATER) {	if ($status == $res->OPEN_LATER) {
return "Open " . timeToHumanString($res->opendate($part));	return "Open " . timeToHumanString($res->opendate($part));
}	}
if ($status == $res->OPEN) {	if ($status == $res->OPEN) {
if ($res->duedate($part)) {	if ($res->duedate($part)) {
return "Due " . timeToHumanString($res->duedate($part));	return &mt("Due")." " .timeToHumanString($res->duedate($part));
} else {	} else {
return "Open, no due date";	return &mt("Open, no due date");
}	}
}	}
if ($status == $res->PAST_DUE_ANSWER_LATER) {	if ($status == $res->PAST_DUE_ANSWER_LATER) {
return "Answer open " . timeToHumanString($res->answerdate($part));	return &mt("Answer open")." " . timeToHumanString($res->answerdate($part));
}	}
if ($status == $res->PAST_DUE_NO_ANSWER) {	if ($status == $res->PAST_DUE_NO_ANSWER) {
return "Was due " . timeToHumanString($res->duedate($part));	return &mt("Was due")." " . timeToHumanString($res->duedate($part));
}	}
if ($status == $res->ANSWER_OPEN) {	if ($status == $res->ANSWER_OPEN) {
return "Answer available";	return &mt("Answer available");
}	}
if ($status == $res->EXCUSED) {	if ($status == $res->EXCUSED) {
return "Excused by instructor";	return &mt("Excused by instructor");
}	}
if ($status == $res->ATTEMPTED) {	if ($status == $res->ATTEMPTED) {
return "Not yet graded.";	return &mt("Answer submitted, not yet graded");
}	}
if ($status == $res->TRIES_LEFT) {	if ($status == $res->TRIES_LEFT) {
my $tries = $res->tries($part);	my $tries = $res->tries($part);
Line 306 sub getDescription {	Line 366 sub getDescription {
$triesString = "<b>$triesString</b>";	$triesString = "<b>$triesString</b>";
}	}
}	}
if ($res->duedate()) {	if ($res->duedate($part)) {
return "Due " . timeToHumanString($res->duedate($part)) .	return &mt("Due")." " . timeToHumanString($res->duedate($part)) .
" $triesString";	" $triesString";
} else {	} else {
return "No due date $triesString";	return &mt("No due date")." $triesString";
}	}
}	}
	if ($status == $res->ANSWER_SUBMITTED) {
	return &mt('Answer submitted');
	}
}	}

# Convenience function, so others can use it: Is the problem due in less then	# Convenience function, so others can use it: Is the problem due in less then
# 24 hours, and still can be done?	# 24 hours, and still can be done?

sub dueInLessThen24Hours {	sub dueInLessThan24Hours {
my $res = shift;	my $res = shift;
my $part = shift;	my $part = shift;
my $status = $res->status($part);	my $status = $res->status($part);

return ($status == $res->OPEN() \|\| $status == $res->ATTEMPTED() \|\|	return ($status == $res->OPEN() \|\|
$status == $res->TRIES_LEFT()) &&	$status == $res->TRIES_LEFT()) &&
$res->duedate() && $res->duedate() < time()+(246060) &&	$res->duedate($part) && $res->duedate($part) < time()+(246060) &&
$res->duedate() > time();	$res->duedate($part) > time();
}	}

# Convenience function, so others can use it: Is there only one try remaining for the	# Convenience function, so others can use it: Is there only one try remaining for the
Line 338 sub lastTry {	Line 401 sub lastTry {
my $tries = $res->tries($part);	my $tries = $res->tries($part);
my $maxtries = $res->maxtries($part);	my $maxtries = $res->maxtries($part);
return $tries && $maxtries && $maxtries > 1 &&	return $tries && $maxtries && $maxtries > 1 &&
$maxtries - $tries == 1 && $res->duedate() &&	$maxtries - $tries == 1 && $res->duedate($part) &&
$res->duedate() > time();	$res->duedate($part) > time();
}	}

# This puts a human-readable name on the ENV variable.	# This puts a human-readable name on the ENV variable.
# FIXME: This needs better logic: Who gets the advanced view of navmaps?
# As of 3-13-03, it's an open question. Guy doesn't want to check
# roles directly because it should be a check of capabilities for future
# role compatibity. There is no capability that matches this one for
# now, so this is done. (A hack for 1.0 might be to simply check roles
# anyhow.)
sub advancedUser {	sub advancedUser {
return $ENV{'user.adv'};	return $ENV{'request.role.adv'};
}	}


Line 366 sub timeToHumanString {	Line 424 sub timeToHumanString {
my ($time) = @_;	my ($time) = @_;
# zero, '0' and blank are bad times	# zero, '0' and blank are bad times
if (!$time) {	if (!$time) {
return 'never';	return &mt('never');
}	}
	unless (&Apache::lonlocal::current_language()=~/^en/) {
	return &Apache::lonlocal::locallocaltime($time);
	}
my $now = time();	my $now = time();

my @time = localtime($time);	my @time = localtime($time);
Line 436 sub timeToHumanString {	Line 496 sub timeToHumanString {
# HH:MM	# HH:MM
if ( $delta < $day * 5 ) {	if ( $delta < $day * 5 ) {
my $timeStr = strftime("%A, %b %e at %I:%M %P", localtime($time));	my $timeStr = strftime("%A, %b %e at %I:%M %P", localtime($time));
$timeStr =~ s/12:00 am/midnight/;	$timeStr =~ s/12:00 am/00:00/;
$timeStr =~ s/12:00 pm/noon/;	$timeStr =~ s/12:00 pm/noon/;
return ($inPast ? "last " : "next ") .	return ($inPast ? "last " : "next ") .
$timeStr;	$timeStr;
Line 446 sub timeToHumanString {	Line 506 sub timeToHumanString {
if ( $time[5] == $now[5]) {	if ( $time[5] == $now[5]) {
# Return on Month Day, HH:MM meridian	# Return on Month Day, HH:MM meridian
my $timeStr = strftime("on %A, %b %e at %I:%M %P", localtime($time));	my $timeStr = strftime("on %A, %b %e at %I:%M %P", localtime($time));
$timeStr =~ s/12:00 am/midnight/;	$timeStr =~ s/12:00 am/00:00/;
$timeStr =~ s/12:00 pm/noon/;	$timeStr =~ s/12:00 pm/noon/;
return $timeStr;	return $timeStr;
}	}

# Not this year, so show the year	# Not this year, so show the year
my $timeStr = strftime("on %A, %b %e %G at %I:%M %P", localtime($time));	my $timeStr = strftime("on %A, %b %e %G at %I:%M %P", localtime($time));
$timeStr =~ s/12:00 am/midnight/;	$timeStr =~ s/12:00 am/00:00/;
$timeStr =~ s/12:00 pm/noon/;	$timeStr =~ s/12:00 pm/noon/;
return $timeStr;	return $timeStr;
}	}
Line 464 sub timeToHumanString {	Line 524 sub timeToHumanString {

=head1 NAME	=head1 NAME

Apache::lonnavmap - Subroutines to handle and render the navigation maps	Apache::lonnavmap - Subroutines to handle and render the navigation
	maps

=head1 SYNOPSIS	=head1 SYNOPSIS

The main handler generates the navigational listing for the course,	The main handler generates the navigational listing for the course,
the other objects export this information in a usable fashion for	the other objects export this information in a usable fashion for
other modules	other modules.

=head1 Object: render	=head1 OVERVIEW

	X<lonnavmaps, overview> When a user enters a course, LON-CAPA examines the
	course structure and caches it in what is often referred to as the
	"big hash" X<big hash>. You can see it if you are logged into
	LON-CAPA, in a course, by going to /adm/test. (You may need to
	tweak the /home/httpd/lonTabs/htpasswd file to view it.) The
	content of the hash will be under the heading "Big Hash".

	Big Hash contains, among other things, how resources are related
	to each other (next/previous), what resources are maps, which
	resources are being chosen to not show to the student (for random
	selection), and a lot of other things that can take a lot of time
	to compute due to the amount of data that needs to be collected and
	processed.

	Apache::lonnavmaps provides an object model for manipulating this
	information in a higher-level fashion then directly manipulating
	the hash. It also provides access to several auxilary functions
	that aren't necessarily stored in the Big Hash, but are a per-
	resource sort of value, like whether there is any feedback on
	a given resource.

	Apache::lonnavmaps also abstracts away branching, and someday,
	conditions, for the times where you don't really care about those
	things.

	Apache::lonnavmaps also provides fairly powerful routines for
	rendering navmaps, and last but not least, provides the navmaps
	view for when the user clicks the NAV button.

	B<Note>: Apache::lonnavmaps I<only> works for the "currently
	logged in user"; if you want things like "due dates for another
	student" lonnavmaps can not directly retrieve information like
	that. You need the EXT function. This module can still help,
	because many things, such as the course structure, are constant
	between users, and Apache::lonnavmaps can help by providing
	symbs for the EXT call.

	The rest of this file will cover the provided rendering routines,
	which can often be used without fiddling with the navmap object at
	all, then documents the Apache::lonnavmaps::navmap object, which
	is the key to accessing the Big Hash information, covers the use
	of the Iterator (which provides the logic for traversing the
	somewhat-complicated Big Hash data structure), documents the
	Apache::lonnavmaps::Resource objects that are returned by

	=head1 Subroutine: render

The navmap renderer package provides a sophisticated rendering of the	The navmap renderer package provides a sophisticated rendering of the
standard navigation maps interface into HTML. The provided nav map	standard navigation maps interface into HTML. The provided nav map
handler is actually just a glorified call to this.	handler is actually just a glorified call to this.

Because of the large number of parameters this function presents,	Because of the large number of parameters this function accepts,
instead of passing it arguments as is normal, pass it in an anonymous	instead of passing it arguments as is normal, pass it in an anonymous
hash with the given options. This is because there is no obvious order	hash with the desired options.
you may wish to override these in and a hash is easier to read and
understand then "undef, undef, undef, 1, undef, undef, renderButton,
undef, 0" when you mostly want default behaviors.

The package provides a function called 'render', called as	The package provides a function called 'render', called as
Apache::lonnavmaps::renderer->render({}).	Apache::lonnavmaps::render({}).

=head2 Overview of Columns	=head2 Overview of Columns

Line 494 The renderer will build an HTML table fo	Line 599 The renderer will build an HTML table fo
it. The table is consists of several columns, and a row for each	it. The table is consists of several columns, and a row for each
resource (or possibly each part). You tell the renderer how many	resource (or possibly each part). You tell the renderer how many
columns to create and what to place in each column, optionally using	columns to create and what to place in each column, optionally using
one or more of the preparent columns, and the renderer will assemble	one or more of the prepared columns, and the renderer will assemble
the table.	the table.

Any additional generally useful column types should be placed in the	Any additional generally useful column types should be placed in the
Line 511 that takes a resource reference, a part	Line 616 that takes a resource reference, a part
argument hash passed to the renderer, and returns a string that will	argument hash passed to the renderer, and returns a string that will
be inserted into the HTML representation as it.	be inserted into the HTML representation as it.

	All other parameters are ways of either changing how the columns
	are printing, or which rows are shown.

The pre-packaged column names are refered to by constants in the	The pre-packaged column names are refered to by constants in the
Apache::lonnavmaps::renderer namespace. The following currently exist:	Apache::lonnavmaps namespace. The following currently exist:

=over 4	=over 4

=item * B<resource>:	=item * B<Apache::lonnavmaps::resource>:

The general info about the resource: Link, icon for the type, etc. The	The general info about the resource: Link, icon for the type, etc. The
first column in the standard nav map display. This column also accepts	first column in the standard nav map display. This column provides the
the following parameter in the renderer hash:	indentation effect seen in the B<NAV> screen. This column also accepts
	the following parameters in the renderer hash:

=over 4	=over 4

=item * B<resource_nolink>:	=item * B<resource_nolink>: default false

If true, the resource will not be linked. Default: false, resource	If true, the resource will not be linked. By default, all non-folder
will have links.	resources are linked.

=item * B<resource_part_count>:	=item * B<resource_part_count>: default true

If true (default), the resource will show a part count if the full	If true, the resource will show a part count B<if> the full
part list is not displayed. If false, the resource will never show a	part list is not displayed. (See "condense_parts" later.) If false,
part count.	the resource will never show a part count.

=item * B<resource_no_folder_link>:	=item * B<resource_no_folder_link>:

Line 543 can't close or open folders when this is	Line 652 can't close or open folders when this is

=back	=back

=item B<communication_status>:	=item * B<Apache::lonnavmaps::communication_status>:

Whether there is discussion on the resource, email for the user, or	Whether there is discussion on the resource, email for the user, or
(lumped in here) perl errors in the execution of the problem. This is	(lumped in here) perl errors in the execution of the problem. This is
the second column in the main nav map.	the second column in the main nav map.

=item B<quick_status>:	=item * B<Apache::lonnavmaps::quick_status>:

An icon for the status of a problem, with four possible states:	An icon for the status of a problem, with five possible states:
Correct, incorrect, open, or none (not open yet, not a problem). The	Correct, incorrect, open, awaiting grading (for a problem where the
	computer's grade is suppressed, or the computer can't grade, like
	essay problem), or none (not open yet, not a problem). The
third column of the standard navmap.	third column of the standard navmap.

=item B<long_status>:	=item * B<Apache::lonnavmaps::long_status>:

A text readout of the details of the current status of the problem,	A text readout of the details of the current status of the problem,
such as "Due in 22 hours". The fourth column of the standard navmap.	such as "Due in 22 hours". The fourth column of the standard navmap.

	=item * B<Apache::lonnavmaps::part_status_summary>:

	A text readout summarizing the status of the problem. If it is a
	single part problem, will display "Correct", "Incorrect",
	"Not yet open", "Open", "Attempted", or "Error". If there are
	multiple parts, this will output a string that in HTML will show a
	status of how many parts are in each status, in color coding, trying
	to match the colors of the icons within reason.

	Note this only makes sense if you are I<not> showing parts. If
	C<showParts> is true (see below), this column will not output
	anything.

=back	=back

If you add any others please be sure to document them here.	If you add any others please be sure to document them here.
Line 578 to override vertical and horizontal alig	Line 702 to override vertical and horizontal alig

=head2 Parameters	=head2 Parameters

Most of these parameters are only useful if you are not using the	Minimally, you should be
folder interface (i.e., the default first column), which is probably
the common case. If you are using this interface, then you should be
able to get away with just using 'cols' (to specify the columns	able to get away with just using 'cols' (to specify the columns
shown), 'url' (necessary for the folders to link to the current screen	shown), 'url' (necessary for the folders to link to the current screen
correctly), and possibly 'queryString' if your app calls for it. In	correctly), and possibly 'queryString' if your app calls for it. In
Line 589 automatically.	Line 711 automatically.

=over 4	=over 4

=item * B<iterator>:	=item * B<iterator>: default: constructs one from %ENV

A reference to a fresh ::iterator to use from the navmaps. The	A reference to a fresh ::iterator to use from the navmaps. The
rendering will reflect the options passed to the iterator, so you can	rendering will reflect the options passed to the iterator, so you can
Line 598 one is not passed, the renderer will att	Line 720 one is not passed, the renderer will att
ENV{'form.filter'} and ENV{'form.condition'} information, plus the	ENV{'form.filter'} and ENV{'form.condition'} information, plus the
'iterator_map' parameter if any.	'iterator_map' parameter if any.

=item * B<iterator_map>:	=item * B<iterator_map>: default: not used

If you are letting the renderer do the iterator handling, you can	If you are letting the renderer do the iterator handling, you can
instruct the renderer to render only a particular map by passing it	instruct the renderer to render only a particular map by passing it
the source of the map you want to process, like	the source of the map you want to process, like
'/res/103/jerf/navmap.course.sequence'.	'/res/103/jerf/navmap.course.sequence'.

=item * B<navmap>:	=item * B<navmap>: default: constructs one from %ENV

A reference to a navmap, used only if an iterator is not passed in. If	A reference to a navmap, used only if an iterator is not passed in. If
this is necessary to make an iterator but it is not passed in, a new	this is necessary to make an iterator but it is not passed in, a new
one will be constructed based on ENV info. This is useful to do basic	one will be constructed based on ENV info. This is useful to do basic
error checking before passing it off to render.	error checking before passing it off to render.

=item * B<r>:	=item * B<r>: default: must be passed in

The standard Apache response object. This must be passed to the	The standard Apache response object. This must be passed to the
renderer or the course hash will be locked.	renderer or the course hash will be locked.

=item * B<cols>:	=item * B<cols>: default: empty (useless)

An array reference	An array reference

=item * B<showParts>:	=item * B<showParts>:default true

A flag. If yes (default), a line for the resource itself, and a line	A flag. If true, a line for the resource itself, and a line
for each part will be displayed. If not, only one line for each	for each part will be displayed. If not, only one line for each
resource will be displayed.	resource will be displayed.

=item * B<condenseParts>:	=item * B<condenseParts>: default true

A flag. If yes (default), if all parts of the problem have the same	A flag. If true, if all parts of the problem have the same
status and that status is Nothing Set, Correct, or Network Failure,	status and that status is Nothing Set, Correct, or Network Failure,
then only one line will be displayed for that resource anyhow. If no,	then only one line will be displayed for that resource anyhow. If no,
all parts will always be displayed. If showParts is 0, this is	all parts will always be displayed. If showParts is 0, this is
ignored.	ignored.

=item * B<jumpCount>:	=item * B<jumpCount>: default: determined from %ENV

A string identifying the URL to place the anchor 'curloc' at. Default	A string identifying the URL to place the anchor 'curloc' at.
to no anchor at all. It is the responsibility of the renderer user to	It is the responsibility of the renderer user to
ensure that the #curloc is in the URL. By default, determined through	ensure that the #curloc is in the URL. By default, determined through
the use of the ENV{} 'jump' information, and should normally "just	the use of the ENV{} 'jump' information, and should normally "just
work" correctly.	work" correctly.

=item * B<here>:	=item * B<here>: default: empty string

A Symb identifying where to place the 'here' marker. Default empty,	A Symb identifying where to place the 'here' marker. The empty
which means no marker.	string means no marker.

=item * B<indentString>:	=item * B<indentString>: default: 25 pixel whitespace image

A string identifying the indentation string to use. By default, this	A string identifying the indentation string to use.
is a 25 pixel whitespace image with no alt text.

=item * B<queryString>:	=item * B<queryString>: default: empty

A string which will be prepended to the query string used when the	A string which will be prepended to the query string used when the
folders are opened or closed.	folders are opened or closed. You can use this to pass
	application-specific values.

=item * B<url>:	=item * B<url>: default: none

The url the folders will link to, which should be the current	The url the folders will link to, which should be the current
page. Required if the resource info column is shown.	page. Required if the resource info column is shown, and you
	are allowing the user to open and close folders.

=item * B<currentJumpIndex>:	=item * B<currentJumpIndex>: default: no jumping

Describes the currently-open row number to cause the browser to jump	Describes the currently-open row number to cause the browser to jump
to, because the user just opened that folder. By default, pulled from	to, because the user just opened that folder. By default, pulled from
the Jump information in the ENV{'form.*'}.	the Jump information in the ENV{'form.*'}.

=item * B<printKey>:	=item * B<printKey>: default: false

If true, print the key that appears on the top of the standard	If true, print the key that appears on the top of the standard
navmaps. Default is false.	navmaps.

=item * B<printCloseAll>:	=item * B<printCloseAll>: default: true

If true, print the "Close all folders" or "open all folders"	If true, print the "Close all folders" or "open all folders"
links. Default is true.	links.

=item * B<filterFunc>:	=item * B<filterFunc>: default: sub {return 1;} (accept everything)

A function that takes the resource object as its only parameter and	A function that takes the resource object as its only parameter and
returns a true or false value. If true, the resource is displayed. If	returns a true or false value. If true, the resource is displayed. If
false, it is simply skipped in the display. By default, all resources	false, it is simply skipped in the display.
are shown.

=item * B<suppressNavmaps>:	=item * B<suppressEmptySequences>: default: false

If true, will not display Navigate Content resources. Default to	If you're using a filter function, and displaying sequences to orient
false.	the user, then frequently some sequences will be empty. Setting this to
	true will cause those sequences not to display, so as not to confuse the
	user into thinking that if the sequence is there there should be things
	under it; for example, see the "Show Uncompleted Homework" view on the
	B<NAV> screen.

	=item * B<suppressNavmaps>: default: false

	If true, will not display Navigate Content resources.

=back	=back

Line 700 be passed through unchange to the column	Line 830 be passed through unchange to the column
generate the following information which your renderer may find	generate the following information which your renderer may find
useful:	useful:

If you want to know how many rows were printed, the 'counter' element
of the hash passed into the render function will contain the
count. You may want to check whether any resources were printed at
all.

=over 4	=over 4

	=item * B<counter>:

	Contains the number of rows printed. Useful after calling the render
	function, as you can detect whether anything was printed at all.

	=item * B<isNewBranch>:

	Useful for renderers: If this resource is currently the first resource
	of a new branch, this will be true. The Resource column (leftmost in the
	navmaps screen) uses this to display the "new branch" icon

=back	=back

=cut	=cut
Line 715 sub resource { return 0; }	Line 851 sub resource { return 0; }
sub communication_status { return 1; }	sub communication_status { return 1; }
sub quick_status { return 2; }	sub quick_status { return 2; }
sub long_status { return 3; }	sub long_status { return 3; }
	sub part_status_summary { return 4; }
# Data for render_resource

sub render_resource {	sub render_resource {
my ($resource, $part, $params) = @_;	my ($resource, $part, $params) = @_;
Line 729 sub render_resource {	Line 864 sub render_resource {
my $filter = $it->{FILTER};	my $filter = $it->{FILTER};

my $title = $resource->compTitle();	my $title = $resource->compTitle();
if ($src =~ /^\/uploaded\//) {
$nonLinkedText=$title;
$title = '';
}
my $partLabel = "";	my $partLabel = "";
my $newBranchText = "";	my $newBranchText = "";

Line 745 sub render_resource {	Line 877 sub render_resource {
my $linkopen = "<a href='$link'>";	my $linkopen = "<a href='$link'>";
my $linkclose = "</a>";	my $linkclose = "</a>";

# Default icon: HTML page	# Default icon: unknown page
my $icon = "<img src='/adm/lonIcons/html.gif' alt='' border='0' />";	my $icon = "<img src='/adm/lonIcons/unknown.gif' alt='' border='0' />";

if ($resource->is_problem()) {	if ($resource->is_problem()) {
if ($part eq "" \|\| $params->{'condensed'}) {	if ($part eq '0' \|\| $params->{'condensed'}) {
$icon = '<img src="/adm/lonIcons/problem.gif" alt="" border="0" />';	$icon = '<img src="/adm/lonIcons/problem.gif" alt="" border="0" />';
} else {	} else {
$icon = $params->{'indentString'};	$icon = $params->{'indentString'};
}	}
	} else {
	$icon = "<img src='".&Apache::loncommon::icon($resource->src).
	"' alt='' border='0' />";
}	}

# Display the correct map icon to open or shut map	# Display the correct map icon to open or shut map
Line 764 sub render_resource {	Line 899 sub render_resource {
$nowOpen = !$nowOpen;	$nowOpen = !$nowOpen;
}	}

	my $folderType = $resource->is_sequence() ? 'folder' : 'page';

if (!$params->{'resource_no_folder_link'}) {	if (!$params->{'resource_no_folder_link'}) {
$icon = 'navmap.folder.' . ($nowOpen ? 'closed' : 'open') . '.gif';	$icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
$icon = "<img src='/adm/lonIcons/$icon' alt='' border='0' />";	$icon = "<img src='/adm/lonIcons/$icon' alt='' border='0' />";

$linkopen = "<a href='" . $params->{'url'} . '?' .	$linkopen = "<a href='" . $params->{'url'} . '?' .
Line 781 sub render_resource {	Line 918 sub render_resource {
"&folderManip=1'>";	"&folderManip=1'>";
} else {	} else {
# Don't allow users to manipulate folder	# Don't allow users to manipulate folder
$icon = 'navmap.folder.' . ($nowOpen ? 'closed' : 'open') .	$icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') .
'.nomanip.gif';	'.nomanip.gif';
$icon = "<img src='/adm/lonIcons/$icon' alt='' border='0' />";	$icon = "<img src='/adm/lonIcons/$icon' alt='' border='0' />";

Line 819 sub render_resource {	Line 956 sub render_resource {
$params->{'displayedHereMarker'} = 1;	$params->{'displayedHereMarker'} = 1;
}	}

if ($resource->is_problem() && $part ne "" &&	if ($resource->is_problem() && $part ne '0' &&
!$params->{'condensed'}) {	!$params->{'condensed'}) {
$partLabel = " (Part $part)";	my $displaypart=&Apache::lonnet::EXT('resource.'.$part.'.display',
	$resource->symb());
	unless ($displaypart) { $displaypart=$part; }
	$partLabel = " (Part: $displaypart)";
	$link.='#'.&Apache::lonnet::escape($part);
$title = "";	$title = "";
}	}

Line 829 sub render_resource {	Line 970 sub render_resource {
$nonLinkedText .= ' (' . $resource->countParts() . ' parts)';	$nonLinkedText .= ' (' . $resource->countParts() . ' parts)';
}	}

if (!$params->{'resource_nolink'}) {	if (!$params->{'resource_nolink'} && !$resource->is_sequence()) {
$result .= " $curMarkerBegin<a href='$link'>$title$partLabel</a>$curMarkerEnd $nonLinkedText</td>";	$result .= " $curMarkerBegin<a href='$link'>$title$partLabel</a>$curMarkerEnd $nonLinkedText</td>";
} else {	} else {
$result .= " $curMarkerBegin$title$partLabel$curMarkerEnd $nonLinkedText</td>";	$result .= " $curMarkerBegin$title$partLabel$curMarkerEnd $nonLinkedText</td>";
Line 866 sub render_communication_status {	Line 1007 sub render_communication_status {

if ($resource->getErrors()) {	if ($resource->getErrors()) {
my $errors = $resource->getErrors();	my $errors = $resource->getErrors();
	my $errorcount = 0;
foreach (split(/,/, $errors)) {	foreach (split(/,/, $errors)) {
	last if ($errorcount>=10); # Only output 10 bombs maximum
if ($_) {	if ($_) {
	$errorcount++;
$errorHTML .= ' <a href="/adm/email?display='	$errorHTML .= ' <a href="/adm/email?display='
. &Apache::lonnet::escape($_) . '">'	. &Apache::lonnet::escape($_) . '">'
. '<img src="/adm/lonMisc/bomb.gif" '	. '<img src="/adm/lonMisc/bomb.gif" '
Line 876 sub render_communication_status {	Line 1020 sub render_communication_status {
}	}
}	}

	if ($params->{'multipart'} && $part != '0') {
	$discussionHTML = $feedbackHTML = $errorHTML = '';
	}

return "<td width=\"75\" align=\"left\" valign=\"center\">$discussionHTML$feedbackHTML$errorHTML </td>";	return "<td width=\"75\" align=\"left\" valign=\"center\">$discussionHTML$feedbackHTML$errorHTML </td>";

}	}
Line 891 sub render_quick_status {	Line 1039 sub render_quick_status {

if ($resource->is_problem() &&	if ($resource->is_problem() &&
!$firstDisplayed) {	!$firstDisplayed) {
my $icon = $statusIconMap{$resource->status($part)};
	my $icon = $statusIconMap{$resource->simpleStatus($part)};
my $alt = $iconAltTags{$icon};	my $alt = $iconAltTags{$icon};
if ($icon) {	if ($icon) {
$result .= "<td width='30' valign='center' width='50' align='right'>$linkopen<img width='25' height='25' src='/adm/lonIcons/$icon' border='0' alt='$alt' />$linkclose</td>\n";	$result .= "<td width='30' valign='center' width='50' align='right'>$linkopen<img width='25' height='25' src='/adm/lonIcons/$icon' border='0' alt='$alt' />$linkclose</td>\n";
Line 914 sub render_long_status {	Line 1063 sub render_long_status {
if ($resource->is_problem()) {	if ($resource->is_problem()) {
$color = $colormap{$resource->status};	$color = $colormap{$resource->status};

if (dueInLessThen24Hours($resource, $part) \|\|	if (dueInLessThan24Hours($resource, $part) \|\|
lastTry($resource, $part)) {	lastTry($resource, $part)) {
$color = $hurryUpColor;	$color = $hurryUpColor;
}	}
Line 930 sub render_long_status {	Line 1079 sub render_long_status {
if ($resource->is_map() && advancedUser() && $resource->randompick()) {	if ($resource->is_map() && advancedUser() && $resource->randompick()) {
$result .= '(randomly select ' . $resource->randompick() .')';	$result .= '(randomly select ' . $resource->randompick() .')';
}	}

$result .= " </td>\n";	# Debugging code
	#$result .= " " . $resource->awarded($part) . '/' . $resource->weight($part) .
	# ' - Part: ' . $part;

	$result .= "</td>\n";

return $result;	return $result;
}	}

	# Colors obtained by taking the icons, matching the colors, and
	# possibly reducing the Value (HSV) of the color, if it's too bright
	# for text, generally by one third or so.
	my %statusColors =
	(
	$resObj->CLOSED => '#000000',
	$resObj->OPEN => '#998b13',
	$resObj->CORRECT => '#26933f',
	$resObj->INCORRECT => '#c48207',
	$resObj->ATTEMPTED => '#a87510',
	$resObj->ERROR => '#000000'
	);
	my %statusStrings =
	(
	$resObj->CLOSED => 'Not yet open',
	$resObj->OPEN => 'Open',
	$resObj->CORRECT => 'Correct',
	$resObj->INCORRECT => 'Incorrect',
	$resObj->ATTEMPTED => 'Attempted',
	$resObj->ERROR => 'Network Error'
	);
	my @statuses = ($resObj->CORRECT, $resObj->ATTEMPTED, $resObj->INCORRECT, $resObj->OPEN, $resObj->CLOSED, $resObj->ERROR);

	use Data::Dumper;
	sub render_parts_summary_status {
	my ($resource, $part, $params) = @_;
	if (!$resource->is_problem() && !$resource->contains_problem) { return '<td></td>'; }
	if ($params->{showParts}) {
	return '<td></td>';
	}

	my $td = "<td align='right'>\n";
	my $endtd = "</td>\n";
	my @probs;

	if ($resource->contains_problem) {
	@probs=$resource->retrieveResources($resource,sub { $_[0]->is_problem() },1,0);
	} else {
	@probs=($resource);
	}
	my $return;
	my %overallstatus;
	my $totalParts;
	foreach my $resource (@probs) {
	# If there is a single part, just show the simple status
	if ($resource->singlepart()) {
	my $status = $resource->simpleStatus(${$resource->parts}[0]);
	$overallstatus{$status}++;
	$totalParts++;
	next;
	}
	# Now we can be sure the $part doesn't really matter.
	my $statusCount = $resource->simpleStatusCount();
	my @counts;
	foreach my $status (@statuses) {
	# decouple display order from the simpleStatusCount order
	my $slot = Apache::lonnavmaps::resource::statusToSlot($status);
	if ($statusCount->[$slot]) {
	$overallstatus{$status}+=$statusCount->[$slot];
	$totalParts+=$statusCount->[$slot];
	}
	}
	}
	$return.= $td . $totalParts . ' parts: ';
	foreach my $status (@statuses) {
	if ($overallstatus{$status}) {
	$return.="<font color='" . $statusColors{$status} .
	"'>" . $overallstatus{$status} . ' '
	. $statusStrings{$status} . "</font>";
	}
	}
	$return.= $endtd;
	return $return;
	}

my @preparedColumns = (\&render_resource, \&render_communication_status,	my @preparedColumns = (\&render_resource, \&render_communication_status,
\&render_quick_status, \&render_long_status);	\&render_quick_status, \&render_long_status,
	\&render_parts_summary_status);

sub setDefault {	sub setDefault {
my ($val, $default) = @_;	my ($val, $default) = @_;
Line 967 sub render {	Line 1196 sub render {
my $jump = $args->{'jump'};	my $jump = $args->{'jump'};
my $here = $args->{'here'};	my $here = $args->{'here'};
my $suppressNavmap = setDefault($args->{'suppressNavmap'}, 0);	my $suppressNavmap = setDefault($args->{'suppressNavmap'}, 0);
	my $closeAllPages = setDefault($args->{'closeAllPages'}, 0);
my $currentJumpDelta = 2; # change this to change how many resources are displayed	my $currentJumpDelta = 2; # change this to change how many resources are displayed
# before the current resource when using #current	# before the current resource when using #current

Line 982 sub render {	Line 1212 sub render {
}	}
}	}

	# Filter: Remember filter function and add our own filter: Refuse
	# to show hidden resources unless the user can see them.
	my $userCanSeeHidden = advancedUser();
	my $filterFunc = setDefault($args->{'filterFunc'},
	sub {return 1;});
	if (!$userCanSeeHidden) {
	# Without renaming the filterfunc, the server seems to go into
	# an infinite loop
	my $oldFilterFunc = $filterFunc;
	$filterFunc = sub { my $res = shift; return !$res->randomout() &&
	&$oldFilterFunc($res);};
	}

my $condition = 0;	my $condition = 0;
if ($ENV{'form.condition'}) {	if ($ENV{'form.condition'}) {
$condition = 1;	$condition = 1;
Line 990 sub render {	Line 1233 sub render {
if (!$ENV{'form.folderManip'} && !defined($args->{'iterator'})) {	if (!$ENV{'form.folderManip'} && !defined($args->{'iterator'})) {
# Step 1: Check to see if we have a navmap	# Step 1: Check to see if we have a navmap
if (!defined($navmap)) {	if (!defined($navmap)) {
$navmap = Apache::lonnavmaps::navmap->new(	$navmap = Apache::lonnavmaps::navmap->new();
$ENV{"request.course.fn"}.".db",
$ENV{"request.course.fn"}."_parms.db", 1, 1);
$mustCloseNavMap = 1;	$mustCloseNavMap = 1;
}	}
$navmap->init();

# Step two: Locate what kind of here marker is necessary	# Step two: Locate what kind of here marker is necessary
# Determine where the "here" marker is and where the screen jumps to.	# Determine where the "here" marker is and where the screen jumps to.
Line 1013 sub render {	Line 1253 sub render {

# Step three: Ensure the folders are open	# Step three: Ensure the folders are open
my $mapIterator = $navmap->getIterator(undef, undef, undef, 1);	my $mapIterator = $navmap->getIterator(undef, undef, undef, 1);
my $depth = 1;	my $curRes;
$mapIterator->next(); # discard the first BEGIN_MAP
my $curRes = $mapIterator->next();
my $found = 0;	my $found = 0;

# We only need to do this if we need to open the maps to show the	# We only need to do this if we need to open the maps to show the
# current position. This will change the counter so we can't count	# current position. This will change the counter so we can't count
# for the jump marker with this loop.	# for the jump marker with this loop.
while ($depth > 0 && !$found) {	while (($curRes = $mapIterator->next()) && !$found) {
if ($curRes == $mapIterator->BEGIN_MAP()) { $depth++; }
if ($curRes == $mapIterator->END_MAP()) { $depth--; }

if (ref($curRes) && $curRes->symb() eq $here) {	if (ref($curRes) && $curRes->symb() eq $here) {
my $mapStack = $mapIterator->getStack();	my $mapStack = $mapIterator->getStack();

Line 1038 sub render {	Line 1273 sub render {
}	}
$found = 1;	$found = 1;
}	}

$curRes = $mapIterator->next();
}	}
}	}

Line 1056 sub render {	Line 1289 sub render {

# Step 1: Check to see if we have a navmap	# Step 1: Check to see if we have a navmap
if (!defined($navmap)) {	if (!defined($navmap)) {
$navmap = Apache::lonnavmaps::navmap->new($r,	$navmap = Apache::lonnavmaps::navmap->new();
$ENV{"request.course.fn"}.".db",
$ENV{"request.course.fn"}."_parms.db", 1, 1);
$mustCloseNavMap = 1;	$mustCloseNavMap = 1;
}	}
# Paranoia: Make sure it's ready
$navmap->init();

# See if we're being passed a specific map	# See if we're being passed a specific map
if ($args->{'iterator_map'}) {	if ($args->{'iterator_map'}) {
Line 1076 sub render {	Line 1305 sub render {
$args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition);	$args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition);
}	}
}	}

# (re-)Locate the jump point, if any	# (re-)Locate the jump point, if any
	# Note this does not take filtering or hidden into account... need
	# to be fixed?
my $mapIterator = $navmap->getIterator(undef, undef, $filterHash, 0);	my $mapIterator = $navmap->getIterator(undef, undef, $filterHash, 0);
my $depth = 1;	my $curRes;
$mapIterator->next();
my $curRes = $mapIterator->next();
my $foundJump = 0;	my $foundJump = 0;
my $counter = 0;	my $counter = 0;

while ($depth > 0 && !$foundJump) {	while (($curRes = $mapIterator->next()) && !$foundJump) {
if ($curRes == $mapIterator->BEGIN_MAP()) { $depth++; }
if ($curRes == $mapIterator->END_MAP()) { $depth--; }
if (ref($curRes)) { $counter++; }	if (ref($curRes)) { $counter++; }

if (ref($curRes) && $jump eq $curRes->symb()) {	if (ref($curRes) && $jump eq $curRes->symb()) {
Line 1098 sub render {	Line 1325 sub render {
$args->{'currentJumpIndex'} = $counter;	$args->{'currentJumpIndex'} = $counter;
$foundJump = 1;	$foundJump = 1;
}	}

$curRes = $mapIterator->next();
}	}

my $showParts = setDefault($args->{'showParts'}, 1);	my $showParts = setDefault($args->{'showParts'}, 1);
Line 1110 sub render {	Line 1335 sub render {
my $printKey = $args->{'printKey'};	my $printKey = $args->{'printKey'};
my $printCloseAll = $args->{'printCloseAll'};	my $printCloseAll = $args->{'printCloseAll'};
if (!defined($printCloseAll)) { $printCloseAll = 1; }	if (!defined($printCloseAll)) { $printCloseAll = 1; }
my $filterFunc = setDefault($args->{'filterFunc'},
sub {return 1;});

# Print key?	# Print key?
if ($printKey) {	if ($printKey) {
Line 1120 sub render {	Line 1343 sub render {
$result.='<tr><td align="right" valign="bottom">Key:  </td>';	$result.='<tr><td align="right" valign="bottom">Key:  </td>';
if ($navmap->{LAST_CHECK}) {	if ($navmap->{LAST_CHECK}) {
$result .=	$result .=
'<img src="/adm/lonMisc/chat.gif"> New discussion since '.	'<img src="/adm/lonMisc/chat.gif"> '.&mt('New discussion since').' '.
strftime("%A, %b %e at %I:%M %P", localtime($navmap->{LAST_CHECK})).	strftime("%A, %b %e at %I:%M %P", localtime($navmap->{LAST_CHECK})).
'</td><td align="center" valign="bottom">  '.	'</td><td align="center" valign="bottom">  '.
'<img src="/adm/lonMisc/feedback.gif"> New message (click to open)<p>'.	'<img src="/adm/lonMisc/feedback.gif"> '.&mt('New message (click to open)').'<p>'.
'</td>';	'</td>';
} else {	} else {
$result .= '<td align="center" valign="bottom">  '.	$result .= '<td align="center" valign="bottom">  '.
'<img src="/adm/lonMisc/chat.gif"> Discussions</td><td align="center" valign="bottom">'.	'<img src="/adm/lonMisc/chat.gif"> '.&mt('Discussions').'</td><td align="center" valign="bottom">'.
'  <img src="/adm/lonMisc/feedback.gif"> New message (click to open)'.	'  <img src="/adm/lonMisc/feedback.gif"> '.&mt('New message (click to open)').
'</td>';	'</td>';
}	}

Line 1139 sub render {	Line 1362 sub render {
if ($condition) {	if ($condition) {
$result.="<a href=\"navmaps?condition=0&filter=&$queryString" .	$result.="<a href=\"navmaps?condition=0&filter=&$queryString" .
"&here=" . Apache::lonnet::escape($here) .	"&here=" . Apache::lonnet::escape($here) .
"\">Close All Folders</a>";	"\">".&mt('Close All Folders')."</a>";
} else {	} else {
$result.="<a href=\"navmaps?condition=1&filter=&$queryString" .	$result.="<a href=\"navmaps?condition=1&filter=&$queryString" .
"&here=" . Apache::lonnet::escape($here) .	"&here=" . Apache::lonnet::escape($here) .
"\">Open All Folders</a>";	"\">".&mt('Open All Folders')."</a>";
}	}
$result .= "<br /><br />\n";	$result .= "<br /><br />\n";
}	}
Line 1172 sub render {	Line 1395 sub render {
$args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='/adm/lonIcons/whitespace1.gif' width='25' height='1' alt='' border='0' />");	$args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='/adm/lonIcons/whitespace1.gif' width='25' height='1' alt='' border='0' />");
$args->{'displayedHereMarker'} = 0;	$args->{'displayedHereMarker'} = 0;

	# If we're suppressing empty sequences, look for them here. Use DFS for speed,
	# since structure actually doesn't matter, except what map has what resources.
	if ($args->{'suppressEmptySequences'}) {
	my $dfsit = Apache::lonnavmaps::DFSiterator->new($navmap,
	$it->{FIRST_RESOURCE},
	$it->{FINISH_RESOURCE},
	{}, undef, 1);
	my $depth = 0;
	$dfsit->next();
	my $curRes = $dfsit->next();
	while ($depth > -1) {
	if ($curRes == $dfsit->BEGIN_MAP()) { $depth++; }
	if ($curRes == $dfsit->END_MAP()) { $depth--; }

	if (ref($curRes)) {
	# Parallel pre-processing: Do sequences have non-filtered-out children?
	if ($curRes->is_map()) {
	$curRes->{DATA}->{HAS_VISIBLE_CHILDREN} = 0;
	# Sequences themselves do not count as visible children,
	# unless those sequences also have visible children.
	# This means if a sequence appears, there's a "promise"
	# that there's something under it if you open it, somewhere.
	} else {
	# Not a sequence: if it's filtered, ignore it, otherwise
	# rise up the stack and mark the sequences as having children
	if (&$filterFunc($curRes)) {
	for my $sequence (@{$dfsit->getStack()}) {
	$sequence->{DATA}->{HAS_VISIBLE_CHILDREN} = 1;
	}
	}
	}
	}
	} continue {
	$curRes = $dfsit->next();
	}
	}

my $displayedJumpMarker = 0;	my $displayedJumpMarker = 0;
# Set up iteration.	# Set up iteration.
$depth = 1;
$it->next(); # discard initial BEGIN_MAP
$curRes = $it->next();
my $now = time();	my $now = time();
my $in24Hours = $now + 24 * 60 * 60;	my $in24Hours = $now + 24 * 60 * 60;
my $rownum = 0;	my $rownum = 0;
Line 1184 sub render {	Line 1441 sub render {
# export "here" marker information	# export "here" marker information
$args->{'here'} = $here;	$args->{'here'} = $here;

while ($depth > 0) {	$args->{'indentLevel'} = -1; # first BEGIN_MAP takes this to 0
if ($curRes == $it->BEGIN_MAP()) { $depth++; }	while ($curRes = $it->next($closeAllPages)) {
if ($curRes == $it->END_MAP()) { $depth--; }

# Maintain indentation level.	# Maintain indentation level.
if ($curRes == $it->BEGIN_MAP() \|\|	if ($curRes == $it->BEGIN_MAP() \|\|
$curRes == $it->BEGIN_BRANCH() ) {	$curRes == $it->BEGIN_BRANCH() ) {
Line 1207 sub render {	Line 1462 sub render {
next;	next;
}	}

$args->{'counter'}++;

# If this has been filtered out, continue on	# If this has been filtered out, continue on
if (!(&$filterFunc($curRes))) {	if (!(&$filterFunc($curRes))) {
$args->{'isNewBranch'} = 0; # Don't falsely remember this	$args->{'isNewBranch'} = 0; # Don't falsely remember this
next;	next;
}	}

	# If this is an empty sequence and we're filtering them, continue on
	if ($curRes->is_map() && $args->{'suppressEmptySequences'} &&
	!$curRes->{DATA}->{HAS_VISIBLE_CHILDREN}) {
	next;
	}

# If we're suppressing navmaps and this is a navmap, continue on	# If we're suppressing navmaps and this is a navmap, continue on
if ($suppressNavmap && $curRes->src() =~ /^\/adm\/navmaps/) {	if ($suppressNavmap && $curRes->src() =~ /^\/adm\/navmaps/) {
next;	next;
}	}

	$args->{'counter'}++;

# Does it have multiple parts?	# Does it have multiple parts?
$args->{'multipart'} = 0;	$args->{'multipart'} = 0;
$args->{'condensed'} = 0;	$args->{'condensed'} = 0;
Line 1228 sub render {	Line 1489 sub render {
# Decide what parts to show.	# Decide what parts to show.
if ($curRes->is_problem() && $showParts) {	if ($curRes->is_problem() && $showParts) {
@parts = @{$curRes->parts()};	@parts = @{$curRes->parts()};
$args->{'multipart'} = scalar(@parts) > 1;	$args->{'multipart'} = $curRes->multipart();

if ($condenseParts) { # do the condensation	if ($condenseParts) { # do the condensation
if (!$curRes->opendate("0")) {	if (!$curRes->opendate("0")) {
Line 1237 sub render {	Line 1498 sub render {
}	}
if (!$args->{'condensed'}) {	if (!$args->{'condensed'}) {
# Decide whether to condense based on similarity	# Decide whether to condense based on similarity
my $status = $curRes->status($parts[1]);	my $status = $curRes->status($parts[0]);
my $due = $curRes->duedate($parts[1]);	my $due = $curRes->duedate($parts[0]);
my $open = $curRes->opendate($parts[1]);	my $open = $curRes->opendate($parts[0]);
my $statusAllSame = 1;	my $statusAllSame = 1;
my $dueAllSame = 1;	my $dueAllSame = 1;
my $openAllSame = 1;	my $openAllSame = 1;
for (my $i = 2; $i < scalar(@parts); $i++) {	for (my $i = 1; $i < scalar(@parts); $i++) {
if ($curRes->status($parts[$i]) != $status){	if ($curRes->status($parts[$i]) != $status){
$statusAllSame = 0;	$statusAllSame = 0;
}	}
Line 1264 sub render {	Line 1525 sub render {
if (($statusAllSame && defined($condenseStatuses{$status})) \|\|	if (($statusAllSame && defined($condenseStatuses{$status})) \|\|
($dueAllSame && $status == $curRes->OPEN && $statusAllSame)\|\|	($dueAllSame && $status == $curRes->OPEN && $statusAllSame)\|\|
($openAllSame && $status == $curRes->OPEN_LATER && $statusAllSame) ){	($openAllSame && $status == $curRes->OPEN_LATER && $statusAllSame) ){
@parts = ();	@parts = ($parts[0]);
$args->{'condensed'} = 1;	$args->{'condensed'} = 1;
}	}

}	}
	# Multipart problem with one part: always "condense" (happens
	# to match the desirable behavior)
	if ($curRes->countParts() == 1) {
	@parts = ($parts[0]);
	$args->{'condensed'} = 1;
	}
}	}
}	}

# If the multipart problem was condensed, "forget" it was multipart	# If the multipart problem was condensed, "forget" it was multipart
if (scalar(@parts) == 1) {	if (scalar(@parts) == 1) {
$args->{'multipart'} = 0;	$args->{'multipart'} = 0;
	} else {
	# Add part 0 so we display it correctly.
	unshift @parts, '0';
}	}

# Now, we've decided what parts to show. Loop through them and	# Now, we've decided what parts to show. Loop through them and
# show them.	# show them.
foreach my $part ('', @parts) {	foreach my $part (@parts) {
if ($part eq '0') {
next;
}
$rownum ++;	$rownum ++;
my $backgroundColor = $backgroundColors[$rownum % scalar(@backgroundColors)];	my $backgroundColor = $backgroundColors[$rownum % scalar(@backgroundColors)];

Line 1292 sub render {	Line 1558 sub render {
my $filter = $it->{FILTER};	my $filter = $it->{FILTER};
my $stack = $it->getStack();	my $stack = $it->getStack();
my $src = getLinkForResource($stack);	my $src = getLinkForResource($stack);
	my $anchor='';
	if ($src=~s/(\#.*$)//) {
	$anchor=$1;
	}
my $srcHasQuestion = $src =~ /\?/;	my $srcHasQuestion = $src =~ /\?/;
$args->{"resourceLink"} = $src.	$args->{"resourceLink"} = $src.
($srcHasQuestion?'&':'?') .	($srcHasQuestion?'&':'?') .
'symb=' . &Apache::lonnet::escape($curRes->symb());	'symb=' . &Apache::lonnet::escape($curRes->symb()).
	$anchor;

# Now, display each column.	# Now, display each column.
foreach my $col (@$cols) {	foreach my $col (@$cols) {
Line 1329 sub render {	Line 1599 sub render {
$r->rflush();	$r->rflush();
}	}
} continue {	} continue {
$curRes = $it->next();	if ($r) {
	# If we have the connection, make sure the user is still connected
	my $c = $r->connection;
	if ($c->aborted()) {
	# Who cares what we do, nobody will see it anyhow.
	return '';
	}
	}
}	}

# Print out the part that jumps to #curloc if it exists	# Print out the part that jumps to #curloc if it exists
Line 1340 sub render {	Line 1617 sub render {
# it's quite likely this might fix other browsers, too, and	# it's quite likely this might fix other browsers, too, and
# certainly won't hurt anything.	# certainly won't hurt anything.
if ($displayedJumpMarker) {	if ($displayedJumpMarker) {
$result .= "<script>setTimeout(\"location += '#curloc';\", 0)</script>\n";	$result .= "
	<script>
	if (location.href.indexOf('#curloc')==-1) {
	setTimeout(\"location += '#curloc';\", 0)
	}
	</script>";
}	}

$result .= "</table>";	$result .= "</table>";
Line 1362 package Apache::lonnavmaps::navmap;	Line 1644 package Apache::lonnavmaps::navmap;

=pod	=pod

lonnavmaps provides functions and objects for dealing with the	=head1 Object: Apache::lonnavmaps::navmap
compiled course hashes generated when a user enters the course, the
Apache handler for the "Navigation Map" button, and a flexible
prepared renderer for navigation maps that are easy to use anywhere.

=head1 Object: navmap	=head2 Overview

Encapsulating the compiled nav map	The navmap object's job is to provide access to the resources
	in the course as Apache::lonnavmaps::resource objects, and to
	query and manage the relationship between those resource objects.

navmap is an object that encapsulates a compiled course map and	Generally, you'll use the navmap object in one of three basic ways.
provides a reasonable interface to it.	In order of increasing complexity and power:

Most notably it provides a way to navigate the map sensibly and a	=over 4
flexible iterator that makes it easy to write various renderers based
on nav maps.

You must obtain resource objects through the navmap object.	=item * C<$navmap-E<gt>getByX>, where X is B<Id>, B<Symb>, B<Url> or B<MapPc>. This provides
	various ways to obtain resource objects, based on various identifiers.
	Use this when you want to request information about one object or
	a handful of resources you already know the identities of, from some
	other source. For more about Ids, Symbs, and MapPcs, see the
	Resource documentation. Note that Url should be a B<last resort>,
	not your first choice; it only works when there is only one
	instance of the resource in the course, which only applies to
	maps, and even that may change in the future.

	=item * C<my @resources = $navmap-E<gt>retrieveResources(args)>. This
	retrieves resources matching some criterion and returns them
	in a flat array, with no structure information. Use this when
	you are manipulating a series of resources, based on what map
	the are in, but do not care about branching, or exactly how
	the maps and resources are related. This is the most common case.

	=item * C<$it = $navmap-E<gt>getIterator(args)>. This allows you traverse
	the course's navmap in various ways without writing the traversal
	code yourself. See iterator documentation below. Use this when
	you need to know absolutely everything about the course, including
	branches and the precise relationship between maps and resources.

=head2 Methods	=back

	=head2 Creation And Destruction

	To create a navmap object, use the following function:

=over 4	=over 4

=item * B<new>(navHashFile, parmHashFile, genCourseAndUserOptions,	=item * B<Apache::lonnavmaps::navmap-E<gt>new>():
genMailDiscussStatus):

Binds a new navmap object to the compiled nav map hash and parm hash	Creates a new navmap object. Returns the navmap object if this is
given as filenames. genCourseAndUserOptions is a flag saying whether	successful, or B<undef> if not.
the course options and user options hash should be generated. This is
for when you are using the parameters of the resources that require	=back
them; see documentation in resource object
documentation. genMailDiscussStatus causes the nav map to retreive	When you are done with the $navmap object, you I<must> call
information about the email and discussion status of	$navmap->untieHashes(), or you'll prevent the current user from using that
resources. Returns the navmap object if this is successful, or	course until the web server is restarted. (!)
B<undef> if not. You must check for undef; errors will occur when you
try to use the other methods otherwise.	=head2 Methods

	=over 4

=item * B<getIterator>(first, finish, filter, condition):	=item * B<getIterator>(first, finish, filter, condition):

Line 1413 sub new {	Line 1718 sub new {
my $class = ref($proto) \|\| $proto;	my $class = ref($proto) \|\| $proto;
my $self = {};	my $self = {};

$self->{NAV_HASH_FILE} = shift;
$self->{PARM_HASH_FILE} = shift;
$self->{GENERATE_COURSE_USER_OPT} = shift;
$self->{GENERATE_EMAIL_DISCUSS_STATUS} = shift;

# Resource cache stores navmap resources as we reference them. We generate	# Resource cache stores navmap resources as we reference them. We generate
# them on-demand so we don't pay for creating resources unless we use them.	# them on-demand so we don't pay for creating resources unless we use them.
$self->{RESOURCE_CACHE} = {};	$self->{RESOURCE_CACHE} = {};
Line 1430 sub new {	Line 1730 sub new {

my %navmaphash;	my %navmaphash;
my %parmhash;	my %parmhash;
if (!(tie(%navmaphash, 'GDBM_File', $self->{NAV_HASH_FILE},	my $courseFn = $ENV{"request.course.fn"};
	if (!(tie(%navmaphash, 'GDBM_File', "${courseFn}.db",
&GDBM_READER(), 0640))) {	&GDBM_READER(), 0640))) {
return undef;	return undef;
}	}

if (!(tie(%parmhash, 'GDBM_File', $self->{PARM_HASH_FILE},	if (!(tie(%parmhash, 'GDBM_File', "${courseFn}_parms.db",
&GDBM_READER(), 0640)))	&GDBM_READER(), 0640)))
{	{
untie %{$self->{PARM_HASH}};	untie %{$self->{PARM_HASH}};
Line 1444 sub new {	Line 1745 sub new {

$self->{NAV_HASH} = \%navmaphash;	$self->{NAV_HASH} = \%navmaphash;
$self->{PARM_HASH} = \%parmhash;	$self->{PARM_HASH} = \%parmhash;
$self->{INITED} = 0;	$self->{PARM_CACHE} = {};

bless($self);	bless($self);

return $self;	return $self;
}	}

sub init {	sub generate_course_user_opt {
my $self = shift;	my $self = shift;
if ($self->{INITED}) { return; }	if ($self->{COURSE_USER_OPT_GENERATED}) { return; }

# If the course opt hash and the user opt hash should be generated,	my $uname=$ENV{'user.name'};
# generate them	my $udom=$ENV{'user.domain'};
if ($self->{GENERATE_COURSE_USER_OPT}) {	my $uhome=$ENV{'user.home'};
my $uname=$ENV{'user.name'};	my $cid=$ENV{'request.course.id'};
my $udom=$ENV{'user.domain'};	my $chome=$ENV{'course.'.$cid.'.home'};
my $uhome=$ENV{'user.home'};	my ($cdom,$cnum)=split(/\_/,$cid);
my $cid=$ENV{'request.course.id'};
my $chome=$ENV{'course.'.$cid.'.home'};	my $userprefix=$uname.'_'.$udom.'_';
my ($cdom,$cnum)=split(/\_/,$cid);
	my %courserdatas; my %useropt; my %courseopt; my %userrdatas;
my $userprefix=$uname.'_'.$udom.'_';	unless ($uhome eq 'no_host') {

my %courserdatas; my %useropt; my %courseopt; my %userrdatas;
unless ($uhome eq 'no_host') {
# ------------------------------------------------- Get coursedata (if present)	# ------------------------------------------------- Get coursedata (if present)
unless ((time-$courserdatas{$cid.'.last_cache'})<240) {	unless ((time-$courserdatas{$cid.'.last_cache'})<240) {
my $reply=&Apache::lonnet::reply('dump:'.$cdom.':'.$cnum.	my $reply=&Apache::lonnet::reply('dump:'.$cdom.':'.$cnum.
':resourcedata',$chome);	':resourcedata',$chome);
if ($reply!~/^error\:/) {	# Check for network failure
$courserdatas{$cid}=$reply;	if ( $reply =~ /no.such.host/i \|\| $reply =~ /con_lost/i) {
$courserdatas{$cid.'.last_cache'}=time;	$self->{NETWORK_FAILURE} = 1;
}	} elsif ($reply!~/^error\:/) {
# check to see if network failed	$courserdatas{$cid}=$reply;
elsif ( $reply=~/no.such.host/i \|\| $reply=~/con.*lost/i )	$courserdatas{$cid.'.last_cache'}=time;
{	}
$self->{NETWORK_FAILURE} = 1;	}
}	foreach (split(/\&/,$courserdatas{$cid})) {
}	my ($name,$value)=split(/\=/,$_);
foreach (split(/\&/,$courserdatas{$cid})) {	$courseopt{$userprefix.&Apache::lonnet::unescape($name)}=
my ($name,$value)=split(/\=/,$_);	&Apache::lonnet::unescape($value);
$courseopt{$userprefix.&Apache::lonnet::unescape($name)}=	}
&Apache::lonnet::unescape($value);
}
# --------------------------------------------------- Get userdata (if present)	# --------------------------------------------------- Get userdata (if present)
unless ((time-$userrdatas{$uname.'___'.$udom.'.last_cache'})<240) {	unless ((time-$userrdatas{$uname.'___'.$udom.'.last_cache'})<240) {
my $reply=&Apache::lonnet::reply('dump:'.$udom.':'.$uname.':resourcedata',$uhome);	my $reply=&Apache::lonnet::reply('dump:'.$udom.':'.$uname.':resourcedata',$uhome);
if ($reply!~/^error\:/) {	if ($reply!~/^error\:/) {
$userrdatas{$uname.'___'.$udom}=$reply;	$userrdatas{$uname.'___'.$udom}=$reply;
$userrdatas{$uname.'___'.$udom.'.last_cache'}=time;	$userrdatas{$uname.'___'.$udom.'.last_cache'}=time;
}	}
# check to see if network failed	# check to see if network failed
elsif ( $reply=~/no.such.host/i \|\| $reply=~/con.*lost/i )	elsif ( $reply=~/no.such.host/i \|\| $reply=~/con.*lost/i )
{	{
$self->{NETWORK_FAILURE} = 1;	$self->{NETWORK_FAILURE} = 1;
}	}
}	}
foreach (split(/\&/,$userrdatas{$uname.'___'.$udom})) {	foreach (split(/\&/,$userrdatas{$uname.'___'.$udom})) {
my ($name,$value)=split(/\=/,$_);	my ($name,$value)=split(/\=/,$_);
$useropt{$userprefix.&Apache::lonnet::unescape($name)}=	$useropt{$userprefix.&Apache::lonnet::unescape($name)}=
&Apache::lonnet::unescape($value);	&Apache::lonnet::unescape($value);
}	}
$self->{COURSE_OPT} = \%courseopt;	$self->{COURSE_OPT} = \%courseopt;
$self->{USER_OPT} = \%useropt;	$self->{USER_OPT} = \%useropt;
}	}
}

if ($self->{GENERATE_EMAIL_DISCUSS_STATUS}) {	$self->{COURSE_USER_OPT_GENERATED} = 1;
my $cid=$ENV{'request.course.id'};
my ($cdom,$cnum)=split(/\_/,$cid);	return;
	}
my %emailstatus = &Apache::lonnet::dump('email_status');
my $logoutTime = $emailstatus{'logout'};
my $courseLeaveTime = $emailstatus{'logout_'.$ENV{'request.course.id'}};
$self->{LAST_CHECK} = ($courseLeaveTime < $logoutTime ?
$courseLeaveTime : $logoutTime);
my %discussiontime = &Apache::lonnet::dump('discussiontimes',
$cdom, $cnum);
my %feedback=();
my %error=();
my $keys = &Apache::lonnet::reply('keys:'.
$ENV{'user.domain'}.':'.
$ENV{'user.name'}.':nohist_email',
$ENV{'user.home'});

foreach my $msgid (split(/\&/, $keys)) {
$msgid=&Apache::lonnet::unescape($msgid);
my $plain=&Apache::lonnet::unescape(&Apache::lonnet::unescape($msgid));
if ($plain=~/(Error\|Feedback) \[([^\]]+)\]/) {
my ($what,$url)=($1,$2);
my %status=
&Apache::lonnet::get('email_status',[$msgid]);
if ($status{$msgid}=~/^error\:/) {
$status{$msgid}='';
}

if (($status{$msgid} eq 'new') \|\|
(!$status{$msgid})) {
if ($what eq 'Error') {
$error{$url}.=','.$msgid;
} else {
$feedback{$url}.=','.$msgid;
}
}
}
}

$self->{FEEDBACK} = \%feedback;
$self->{ERROR_MSG} = \%error; # what is this? JB
$self->{DISCUSSION_TIME} = \%discussiontime;
$self->{EMAIL_STATUS} = \%emailstatus;

}

$self->{PARM_CACHE} = {};	sub generate_email_discuss_status {
$self->{INITED} = 1;	my $self = shift;
	if ($self->{EMAIL_DISCUSS_GENERATED}) { return; }

	my $cid=$ENV{'request.course.id'};
	my ($cdom,$cnum)=split(/\_/,$cid);

	my %emailstatus = &Apache::lonnet::dump('email_status');
	my $logoutTime = $emailstatus{'logout'};
	my $courseLeaveTime = $emailstatus{'logout_'.$ENV{'request.course.id'}};
	$self->{LAST_CHECK} = (($courseLeaveTime > $logoutTime) ?
	$courseLeaveTime : $logoutTime);
	my %discussiontime = &Apache::lonnet::dump('discussiontimes',
	$cdom, $cnum);
	my %feedback=();
	my %error=();
	my $keys = &Apache::lonnet::reply('keys:'.
	$ENV{'user.domain'}.':'.
	$ENV{'user.name'}.':nohist_email',
	$ENV{'user.home'});

	foreach my $msgid (split(/\&/, $keys)) {
	$msgid=&Apache::lonnet::unescape($msgid);
	my $plain=&Apache::lonnet::unescape(&Apache::lonnet::unescape($msgid));
	if ($plain=~/(Error\|Feedback) \[([^\]]+)\]/) {
	my ($what,$url)=($1,$2);
	my %status=
	&Apache::lonnet::get('email_status',[$msgid]);
	if ($status{$msgid}=~/^error\:/) {
	$status{$msgid}='';
	}

	if (($status{$msgid} eq 'new') \|\|
	(!$status{$msgid})) {
	if ($what eq 'Error') {
	$error{$url}.=','.$msgid;
	} else {
	$feedback{$url}.=','.$msgid;
	}
	}
	}
	}

	$self->{FEEDBACK} = \%feedback;
	$self->{ERROR_MSG} = \%error; # what is this? JB
	$self->{DISCUSSION_TIME} = \%discussiontime;
	$self->{EMAIL_STATUS} = \%emailstatus;

	$self->{EMAIL_DISCUSS_GENERATED} = 1;
	}

	sub get_user_data {
	my $self = shift;
	if ($self->{RETRIEVED_USER_DATA}) { return; }

	# Retrieve performance data on problems
	my %student_data = Apache::lonnet::currentdump($ENV{'request.course.id'},
	$ENV{'user.domain'},
	$ENV{'user.name'});
	$self->{STUDENT_DATA} = \%student_data;

	$self->{RETRIEVED_USER_DATA} = 1;
}	}

# Internal function: Takes a key to look up in the nav hash and implements internal	# Internal function: Takes a key to look up in the nav hash and implements internal
Line 1569 sub navhash {	Line 1882 sub navhash {
return $self->{NAV_HASH}->{$key};	return $self->{NAV_HASH}->{$key};
}	}

	=pod

	=item * B<courseMapDefined>(): Returns true if the course map is defined,
	false otherwise. Undefined course maps indicate an error somewhere in
	LON-CAPA, and you will not be able to proceed with using the navmap.
	See the B<NAV> screen for an example of using this.

	=cut

# Checks to see if coursemap is defined, matching test in old lonnavmaps	# Checks to see if coursemap is defined, matching test in old lonnavmaps
sub courseMapDefined {	sub courseMapDefined {
my $self = shift;	my $self = shift;
Line 1598 sub untieHashes {	Line 1920 sub untieHashes {
sub hasDiscussion {	sub hasDiscussion {
my $self = shift;	my $self = shift;
my $symb = shift;	my $symb = shift;

	$self->generate_email_discuss_status();

if (!defined($self->{DISCUSSION_TIME})) { return 0; }	if (!defined($self->{DISCUSSION_TIME})) { return 0; }

#return defined($self->{DISCUSSION_TIME}->{$symb});	#return defined($self->{DISCUSSION_TIME}->{$symb});
Line 1612 sub getFeedback {	Line 1937 sub getFeedback {
my $self = shift;	my $self = shift;
my $symb = shift;	my $symb = shift;

	$self->generate_email_discuss_status();

if (!defined($self->{FEEDBACK})) { return ""; }	if (!defined($self->{FEEDBACK})) { return ""; }

return $self->{FEEDBACK}->{$symb};	return $self->{FEEDBACK}->{$symb};
Line 1621 sub getFeedback {	Line 1948 sub getFeedback {
sub getErrors {	sub getErrors {
my $self = shift;	my $self = shift;
my $src = shift;	my $src = shift;

	$self->generate_email_discuss_status();

if (!defined($self->{ERROR_MSG})) { return ""; }	if (!defined($self->{ERROR_MSG})) { return ""; }
return $self->{ERROR_MSG}->{$src};	return $self->{ERROR_MSG}->{$src};
}	}
Line 1635 object for that resource. This method, o	Line 1964 object for that resource. This method, o
(as in the resource object) is the only proper way to obtain a	(as in the resource object) is the only proper way to obtain a
resource object.	resource object.

	=item * B<getBySymb>(symb):

	Based on the symb of the resource, get a resource object for that
	resource. This is one of the proper ways to get a resource object.

	=item * B<getMapByMapPc>(map_pc):

	Based on the map_pc of the resource, get a resource object for
	the given map. This is one of the proper ways to get a resource object.

=cut	=cut

# The strategy here is to cache the resource objects, and only construct them	# The strategy here is to cache the resource objects, and only construct them
# as we use them. The real point is to prevent reading any more from the tied	# as we use them. The real point is to prevent reading any more from the tied
# hash then we have to, which should hopefully alleviate speed problems.	# hash then we have to, which should hopefully alleviate speed problems.
# Caching is just an incidental detail I throw in because it makes sense.

sub getById {	sub getById {
my $self = shift;	my $self = shift;
Line 1660 sub getById {	Line 1998 sub getById {
sub getBySymb {	sub getBySymb {
my $self = shift;	my $self = shift;
my $symb = shift;	my $symb = shift;
my ($mapUrl, $id, $filename) = split (/___/, $symb);	my ($mapUrl, $id, $filename) = &Apache::lonnet::decode_symb($symb);
my $map = $self->getResourceByUrl($mapUrl);	my $map = $self->getResourceByUrl($mapUrl);
return $self->getById($map->map_pc() . '.' . $id);	return $self->getById($map->map_pc() . '.' . $id);
}	}

	sub getByMapPc {
	my $self = shift;
	my $map_pc = shift;
	my $map_id = $self->{NAV_HASH}->{'map_id_' . $map_pc};
	$map_id = $self->{NAV_HASH}->{'ids_' . $map_id};
	return $self->getById($map_id);
	}

=pod	=pod

=item * B<firstResource>():	=item * B<firstResource>():
Line 1715 sub parmval {	Line 2061 sub parmval {

sub parmval_real {	sub parmval_real {
my $self = shift;	my $self = shift;
my ($what,$symb) = @_;	my ($what,$symb,$recurse) = @_;

	# Make sure the {USER_OPT} and {COURSE_OPT} hashes are populated
	$self->generate_course_user_opt();

my $cid=$ENV{'request.course.id'};	my $cid=$ENV{'request.course.id'};
my $csec=$ENV{'request.course.sec'};	my $csec=$ENV{'request.course.sec'};
Line 1725 sub parmval_real {	Line 2074 sub parmval_real {
unless ($symb) { return ''; }	unless ($symb) { return ''; }
my $result='';	my $result='';

my ($mapname,$id,$fn)=split(/\_\_\_/,$symb);	my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);

# ----------------------------------------------------- Cascading lookup scheme	# ----------------------------------------------------- Cascading lookup scheme
my $rwhat=$what;	my $rwhat=$what;
Line 1775 sub parmval_real {	Line 2124 sub parmval_real {

# ----------------------------------------------------- fourth , check default	# ----------------------------------------------------- fourth , check default

my $default=&Apache::lonnet::metadata($fn,$rwhat.'.default');	my $meta_rwhat=$rwhat;
	$meta_rwhat=~s/\./_/g;
	my $default=&Apache::lonnet::metadata($fn,$meta_rwhat);
	if (defined($default)) { return $default}
	$default=&Apache::lonnet::metadata($fn,'parameter_'.$meta_rwhat);
if (defined($default)) { return $default}	if (defined($default)) { return $default}

# --------------------------------------------------- fifth , cascade up parts	# --------------------------------------------------- fifth , cascade up parts
Line 1787 sub parmval_real {	Line 2140 sub parmval_real {
my $id=pop(@parts);	my $id=pop(@parts);
my $part=join('_',@parts);	my $part=join('_',@parts);
if ($part eq '') { $part='0'; }	if ($part eq '') { $part='0'; }
my $partgeneral=$self->parmval($part.".$qualifier",$symb);	my $partgeneral=$self->parmval($part.".$qualifier",$symb,1);
if (defined($partgeneral)) { return $partgeneral; }	if (defined($partgeneral)) { return $partgeneral; }
}	}
	if ($recurse) { return undef; }
	my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$what);
	if (defined($pack_def)) { return $pack_def; }
return '';	return '';
}	}

Line 1827 want to know is if I<any> resources matc	Line 2183 want to know is if I<any> resources matc
parameter will allow you to avoid potentially expensive enumeration of	parameter will allow you to avoid potentially expensive enumeration of
all matching resources.	all matching resources.

=item * B<hasResources>(map, filterFunc, recursive):	=item * B<hasResource>(map, filterFunc, recursive):

Convience method for	Convience method for

Line 1870 sub retrieveResources {	Line 2226 sub retrieveResources {
$map = $self->getResourceByUrl($map);	$map = $self->getResourceByUrl($map);
}	}

	# If nothing was passed, assume top-level map
	if (!$map) {
	$map = $self->getById('0.0');
	}

# Check the map's validity.	# Check the map's validity.
if (!$map \|\| !$map->is_map()) {	if (!$map->is_map()) {
# Oh, to throw an exception.... how I'd love that!	# Oh, to throw an exception.... how I'd love that!
return ();	return ();
}	}

# Get an iterator.	# Get an iterator.
my $it = $self->getIterator($map->map_start(), $map->map_finish(),	my $it = $self->getIterator($map->map_start(), $map->map_finish(),
!$recursive);	undef, $recursive);

my @resources = ();	my @resources = ();

# Run down the iterator and collect the resources.	# Run down the iterator and collect the resources.
my $depth = 1;	my $curRes;
$it->next();
my $curRes = $it->next();	while ($curRes = $it->next()) {

while ($depth > 0) {
if ($curRes == $it->BEGIN_MAP()) {
$depth++;
}
if ($curRes == $it->END_MAP()) {
$depth--;
}

if (ref($curRes)) {	if (ref($curRes)) {
if (!&$filterFunc($curRes)) {	if (!&$filterFunc($curRes)) {
next;	next;
Line 1907 sub retrieveResources {	Line 2259 sub retrieveResources {
}	}
}	}

$curRes = $it->next();
}	}

return @resources;	return @resources;
Line 1959 corresponds to where you want the iterat	Line 2310 corresponds to where you want the iterat
navmap->finishResource(). filterHash is a hash used as a set	navmap->finishResource(). filterHash is a hash used as a set
containing strings representing the resource IDs, defaulting to	containing strings representing the resource IDs, defaulting to
empty. Condition is a 1 or 0 that sets what to do with the filter	empty. Condition is a 1 or 0 that sets what to do with the filter
hash: If a 0, then only resource that exist IN the filterHash will be	hash: If a 0, then only resources that exist IN the filterHash will be
recursed on. If it is a 1, only resources NOT in the filterHash will	recursed on. If it is a 1, only resources NOT in the filterHash will
be recursed on. Defaults to 0. forceTop is a boolean value. If it is	be recursed on. Defaults to 0. forceTop is a boolean value. If it is
false (default), the iterator will only return the first level of map	false (default), the iterator will only return the first level of map
Line 1983 new branch. The possible tokens are:	Line 2334 new branch. The possible tokens are:

=over 4	=over 4

=item * BEGIN_MAP:	=item * B<END_ITERATOR>:

	The iterator has returned all that it's going to. Further calls to the
	iterator will just produce more of these. This is a "false" value, and
	is the only false value the iterator which will be returned, so it can
	be used as a loop sentinel.

	=item * B<BEGIN_MAP>:

A new map is being recursed into. This is returned I<after> the map	A new map is being recursed into. This is returned I<after> the map
resource itself is returned.	resource itself is returned.

=item * END_MAP:	=item * B<END_MAP>:

The map is now done.	The map is now done.

=item * BEGIN_BRANCH:	=item * B<BEGIN_BRANCH>:

A branch is now starting. The next resource returned will be the first	A branch is now starting. The next resource returned will be the first
in that branch.	in that branch.

=item * END_BRANCH:	=item * B<END_BRANCH>:

The branch is now done.	The branch is now done.

Line 2015 but only one resource will be returned.	Line 2373 but only one resource will be returned.

=back	=back

	=head2 Normal Usage

	Normal usage of the iterator object is to do the following:

	my $it = $navmap->getIterator([your params here]);
	my $curRes;
	while ($curRes = $it->next()) {
	[your logic here]
	}

	Note that inside of the loop, it's frequently useful to check if
	"$curRes" is a reference or not with the reference function; only
	resource objects will be references, and any non-references will
	be the tokens described above.

	Also note there is some old code floating around that trys to track
	the depth of the iterator to see when it's done; do not copy that
	code. It is difficult to get right and harder to understand then
	this. They should be migrated to this new style.

=cut	=cut

# Here are the tokens for the iterator:	# Here are the tokens for the iterator:

	sub END_ITERATOR { return 0; }
sub BEGIN_MAP { return 1; } # begining of a new map	sub BEGIN_MAP { return 1; } # begining of a new map
sub END_MAP { return 2; } # end of the map	sub END_MAP { return 2; } # end of the map
sub BEGIN_BRANCH { return 3; } # beginning of a branch	sub BEGIN_BRANCH { return 3; } # beginning of a branch
Line 2031 sub min {	Line 2410 sub min {
if ($a < $b) { return $a; } else { return $b; }	if ($a < $b) { return $a; } else { return $b; }
}	}

# In the CVS repository, documentation of this algorithm is included
# in /doc/lonnavdocs, as a PDF and .tex source. Markers like 1
# will reference the same location in the text as the part of the
# algorithm is running through.

sub new {	sub new {
# magic invocation to create a class instance	# magic invocation to create a class instance
my $proto = shift;	my $proto = shift;
Line 2091 sub new {	Line 2465 sub new {
# that isn't just a redirector.	# that isn't just a redirector.
my $resource; my $resourceCount = 0;	my $resource; my $resourceCount = 0;

	# Documentation on this algorithm can be found in the CVS repository at
	# /docs/lonnavdocs; these "#" markers correspond to documentation
	# in that file.
# 1	# 1

foreach my $pass (@iterations) {	foreach my $pass (@iterations) {
Line 2106 sub new {	Line 2483 sub new {

# prime the recursion	# prime the recursion
$self->{$firstResourceName}->{DATA}->{$valName} = 0;	$self->{$firstResourceName}->{DATA}->{$valName} = 0;
my $depth = 0;	$iterator->next();
$iterator->next();
my $curRes = $iterator->next();	my $curRes = $iterator->next();
while ($depth > -1) {	my $depth = 1;
if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }	while ($depth > 0) {
if ($curRes == $iterator->END_MAP()) { $depth--; }	if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
	if ($curRes == $iterator->END_MAP()) { $depth--; }

if (ref($curRes)) {	if (ref($curRes)) {
# If there's only one resource, this will save it	# If there's only one resource, this will save it
# we have to filter empty resources from consideration here,	# we have to filter empty resources from consideration here,
Line 2145 sub new {	Line 2522 sub new {

$curRes->{DATA}->{DISPLAY_DEPTH} = $finalDepth;	$curRes->{DATA}->{DISPLAY_DEPTH} = $finalDepth;
if ($finalDepth > $maxDepth) {$maxDepth = $finalDepth;}	if ($finalDepth > $maxDepth) {$maxDepth = $finalDepth;}
}	}
$curRes = $iterator->next();
	$curRes = $iterator->next();
}	}
}	}

# Check: Was this only one resource, a map?	# Check: Was this only one resource, a map?
if ($resourceCount == 1 && $resource->is_map() && !$self->{FORCE_TOP}) {	if ($resourceCount == 1 && $resource->is_sequence() && !$self->{FORCE_TOP}) {
my $firstResource = $resource->map_start();	my $firstResource = $resource->map_start();
my $finishResource = $resource->map_finish();	my $finishResource = $resource->map_finish();
return	return
Line 2167 sub new {	Line 2545 sub new {
$self->{MAX_DEPTH} = $maxDepth;	$self->{MAX_DEPTH} = $maxDepth;
$self->{STACK} = [];	$self->{STACK} = [];
$self->{RECURSIVE_ITERATOR_FLAG} = 0;	$self->{RECURSIVE_ITERATOR_FLAG} = 0;
	$self->{FINISHED} = 0; # When true, the iterator has finished

for (my $i = 0; $i <= $self->{MAX_DEPTH}; $i++) {	for (my $i = 0; $i <= $self->{MAX_DEPTH}; $i++) {
push @{$self->{STACK}}, [];	push @{$self->{STACK}}, [];
Line 2183 sub new {	Line 2562 sub new {

sub next {	sub next {
my $self = shift;	my $self = shift;
	my $closeAllPages=shift;
	if ($self->{FINISHED}) {
	return END_ITERATOR();
	}

# If we want to return the top-level map object, and haven't yet,	# If we want to return the top-level map object, and haven't yet,
# do so.	# do so.
Line 2193 sub next {	Line 2576 sub next {

if ($self->{RECURSIVE_ITERATOR_FLAG}) {	if ($self->{RECURSIVE_ITERATOR_FLAG}) {
# grab the next from the recursive iterator	# grab the next from the recursive iterator
my $next = $self->{RECURSIVE_ITERATOR}->next();	my $next = $self->{RECURSIVE_ITERATOR}->next($closeAllPages);

# is it a begin or end map? If so, update the depth	# is it a begin or end map? If so, update the depth
if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }	if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
Line 2243 sub next {	Line 2626 sub next {
$self->{CURRENT_DEPTH}--;	$self->{CURRENT_DEPTH}--;
return END_BRANCH();	return END_BRANCH();
} else {	} else {
	$self->{FINISHED} = 1;
return END_MAP();	return END_MAP();
}	}
}	}
Line 2306 sub next {	Line 2690 sub next {

# That ends the main iterator logic. Now, do we want to recurse	# That ends the main iterator logic. Now, do we want to recurse
# down this map (if this resource is a map)?	# down this map (if this resource is a map)?
if ($self->{HERE}->is_map() &&	if ( ($self->{HERE}->is_sequence() \|\| (!$closeAllPages && $self->{HERE}->is_page())) &&
(defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {	(defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
$self->{RECURSIVE_ITERATOR_FLAG} = 1;	$self->{RECURSIVE_ITERATOR_FLAG} = 1;
my $firstResource = $self->{HERE}->map_start();	my $firstResource = $self->{HERE}->map_start();
Line 2324 sub next {	Line 2708 sub next {
my $browsePriv = $self->{HERE}->browsePriv();	my $browsePriv = $self->{HERE}->browsePriv();
if (!$self->{HERE}->src() \|\|	if (!$self->{HERE}->src() \|\|
(!($browsePriv eq 'F') && !($browsePriv eq '2')) ) {	(!($browsePriv eq 'F') && !($browsePriv eq '2')) ) {
return $self->next();	return $self->next($closeAllPages);
}	}

return $self->{HERE};	return $self->{HERE};
Line 2376 package Apache::lonnavmaps::DFSiterator;	Line 2760 package Apache::lonnavmaps::DFSiterator;
# useful for pre-processing of some kind, and is in fact used by the main	# useful for pre-processing of some kind, and is in fact used by the main
# iterator that way, but that's about it.	# iterator that way, but that's about it.
# One could imagine merging this into the init routine of the main iterator,	# One could imagine merging this into the init routine of the main iterator,
# but this might as well be left seperate, since it is possible some other	# but this might as well be left separate, since it is possible some other
# use might be found for it. - Jeremy	# use might be found for it. - Jeremy

# Unlike the main iterator, this DOES return all resources, even blank ones.	# Unlike the main iterator, this DOES return all resources, even blank ones.
Line 2522 sub next {	Line 2906 sub next {
return $self->{HERE};	return $self->{HERE};
}	}

	# Identical to the full iterator methods of the same name. Hate to copy/paste
	# but I also hate to "inherit" either iterator from the other.

	sub getStack {
	my $self=shift;

	my @stack;

	$self->populateStack(\@stack);

	return \@stack;
	}

	# Private method: Calls the iterators recursively to populate the stack.
	sub populateStack {
	my $self=shift;
	my $stack = shift;

	push @$stack, $self->{HERE} if ($self->{HERE});

	if ($self->{RECURSIVE_ITERATOR_FLAG}) {
	$self->{RECURSIVE_ITERATOR}->populateStack($stack);
	}
	}

1;	1;

package Apache::lonnavmaps::resource;	package Apache::lonnavmaps::resource;
Line 2530 use Apache::lonnet;	Line 2939 use Apache::lonnet;

=pod	=pod

=head1 Object: resource	=head1 Object: resource

	X<resource, navmap object>
A resource object encapsulates a resource in a resource map, allowing	A resource object encapsulates a resource in a resource map, allowing
easy manipulation of the resource, querying the properties of the	easy manipulation of the resource, querying the properties of the
resource (including user properties), and represents a reference that	resource (including user properties), and represents a reference that
Line 2545 You will probably never need to instanti	Line 2955 You will probably never need to instanti
Apache::lonnavmaps::navmap, and use the "start" method to obtain the	Apache::lonnavmaps::navmap, and use the "start" method to obtain the
starting resource.	starting resource.

=head2 Public Members	Resource objects respect the parameter_hiddenparts, which suppresses
	various parts according to the wishes of the map author. As of this
resource objects have a hash called DATA ($resourceRef->{DATA}) that	writing, there is no way to override this parameter, and suppressed
you can store whatever you want in. This allows you to easily do	parts will never be returned, nor will their response types or ids be
two-pass algorithms without worrying about managing your own	stored.
resource->data hash.
	=head2 Overview
=head2 Methods
	A B<Resource> is the most granular type of object in LON-CAPA that can
=over 4	be included in a course. It can either be a particular resource, like
	an HTML page, external resource, problem, etc., or it can be a
=item * B<new>($navmapRef, $idString):	container sequence, such as a "page" or a "map".

The first arg is a reference to the parent navmap object. The second	To see a sequence from the user's point of view, please see the
is the idString of the resource itself. Very rarely, if ever, called	B<Creating a Course: Maps and Sequences> chapter of the Author's
directly. Use the nav map->getByID() method.	Manual.

=back	A Resource Object, once obtained from a navmap object via a B<getBy*>
	method of the navmap, or from an iterator, allows you to query
	information about that resource.

	Generally, you do not ever want to create a resource object yourself,
	so creation has been left undocumented. Always retrieve resources
	from navmap objects.

	=head3 Identifying Resources

	X<big hash>Every resource is identified by a Resource ID in the big hash that is
	unique to that resource for a given course. X<resource ID, in big hash>
	The Resource ID has the form #.#, where the first number is the same
	for every resource in a map, and the second is unique. For instance,
	for a course laid out like this:

	* Problem 1
	* Map
	* Resource 2
	* Resource 3

	C<Problem 1> and C<Map> will share a first number, and C<Resource 2>
	C<Resource 3> will share a first number. The second number may end up
	re-used between the two groups.

	The resource ID is only used in the big hash, but can be used in the
	context of a course to identify a resource easily. (For instance, the
	printing system uses it to record which resources from a sequence you
	wish to print.)

	X<symb> X<resource, symb>
	All resources also have B<symb>s, which uniquely identify a resource
	in a course. Many internal LON-CAPA functions expect a symb. A symb
	carries along with it the URL of the resource, and the map it appears
	in. Symbs are much larger then resource IDs.

=cut	=cut

Line 2601 sub navHash {	Line 3045 sub navHash {

=pod	=pod

B<Metadata Retreival>	=head2 Methods

	Once you have a resource object, here's what you can do with it:

	=head3 Attribute Retrieval

These are methods that help you retrieve metadata about the resource:	Every resource has certain attributes that can be retrieved and used:
Method names are based on the fields in the compiled course
representation.

=over 4	=over 4

	=item * B<ID>: Every resource has an ID that is unique for that
	resource in the course it is in. The ID is actually in the hash
	representing the resource, so for a resource object $res, obtain
	it via C<$res->{ID}).

=item * B<compTitle>:	=item * B<compTitle>:

Returns a "composite title", that is equal to $res->title() if the	Returns a "composite title", that is equal to $res->title() if the
Line 2619 resource has a title, and is otherwise t	Line 3070 resource has a title, and is otherwise t

Returns true if the resource is external.	Returns true if the resource is external.

=item * B<goesto>:

Returns the "goesto" value from the compiled nav map. (It is likely
you want to use B<getNext> instead.)

=item * B<kind>:	=item * B<kind>:

Returns the kind of the resource from the compiled nav map.	Returns the kind of the resource from the compiled nav map.
Line 2651 Returns the symb for the resource.	Line 3097 Returns the symb for the resource.

Returns the title of the resource.	Returns the title of the resource.

=item * B<to>:

Returns the "to" value from the compiled nav map. (It is likely you
want to use B<getNext> instead.)

=back	=back

=cut	=cut
Line 2665 want to use B<getNext> instead.)	Line 3106 want to use B<getNext> instead.)
sub comesfrom { my $self=shift; return $self->navHash("comesfrom_", 1); }	sub comesfrom { my $self=shift; return $self->navHash("comesfrom_", 1); }
sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }	sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
sub from { my $self=shift; return $self->navHash("from_", 1); }	sub from { my $self=shift; return $self->navHash("from_", 1); }
	# considered private and undocumented
sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }	sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
sub kind { my $self=shift; return $self->navHash("kind_", 1); }	sub kind { my $self=shift; return $self->navHash("kind_", 1); }
sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }	sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
Line 2681 sub symb {	Line 3123 sub symb {
my $self=shift;	my $self=shift;
(my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;	(my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
my $symbSrc = &Apache::lonnet::declutter($self->src());	my $symbSrc = &Apache::lonnet::declutter($self->src());
return &Apache::lonnet::declutter(	my $symb = &Apache::lonnet::declutter($self->navHash('map_id_'.$first))
$self->navHash('map_id_'.$first))
. '___' . $second . '___' . $symbSrc;	. '___' . $second . '___' . $symbSrc;
	return &Apache::lonnet::symbclean($symb);
}	}
sub title { my $self=shift; return $self->navHash("title_", 1); }	sub title {
	my $self=shift;
	if ($self->{ID} eq '0.0') {
	# If this is the top-level map, return the title of the course
	# since this map can not be titled otherwise.
	return $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
	}
	return $self->navHash("title_", 1); }
	# considered private and undocumented
sub to { my $self=shift; return $self->navHash("to_", 1); }	sub to { my $self=shift; return $self->navHash("to_", 1); }
sub compTitle {	sub compTitle {
my $self = shift;	my $self = shift;
Line 2727 Returns true if the resource is a sequen	Line 3177 Returns true if the resource is a sequen

=cut	=cut

	sub hasResource {
	my $self = shift;
	return $self->{NAV_MAP}->hasResource(@_);
	}

	sub retrieveResources {
	my $self = shift;
	return $self->{NAV_MAP}->retrieveResources(@_);
	}

sub is_html {	sub is_html {
my $self=shift;	my $self=shift;
Line 2737 sub is_map { my $self=shift; return defi	Line 3196 sub is_map { my $self=shift; return defi
sub is_page {	sub is_page {
my $self=shift;	my $self=shift;
my $src = $self->src();	my $src = $self->src();
return ($src =~ /page$/);	return $self->navHash("is_map_", 1) &&
	$self->navHash("map_type_" . $self->map_pc()) eq 'page';
}	}
sub is_problem {	sub is_problem {
my $self=shift;	my $self=shift;
my $src = $self->src();	my $src = $self->src();
return ($src =~ /problem$/);	return ($src =~ /\.(problem\|exam\|quiz\|assess\|survey\|form\|library)$/)
	}
	sub contains_problem {
	my $self=shift;
	if ($self->is_page()) {
	my $hasProblem=$self->hasResource($self,sub { $_[0]->is_problem() },1);
	return $hasProblem;
	}
	return 0;
}	}
sub is_sequence {	sub is_sequence {
my $self=shift;	my $self=shift;
my $src = $self->src();	my $src = $self->src();
return ($src =~ /sequence$/);	return $self->navHash("is_map_", 1) &&
	$self->navHash("map_type_" . $self->map_pc()) eq 'sequence';
}	}

# Private method: Shells out to the parmval in the nav map, handler parts.	# Private method: Shells out to the parmval in the nav map, handler parts.
sub parmval {	sub parmval {
my $self = shift;	my $self = shift;
my $what = shift;	my $what = shift;
my $part = shift \|\| "0";	my $part = shift;
	if (!defined($part)) {
	$part = '0';
	}
return $self->{NAV_MAP}->parmval($part.'.'.$what, $self->symb());	return $self->{NAV_MAP}->parmval($part.'.'.$what, $self->symb());
}	}

Line 2819 sub map_type {	Line 3291 sub map_type {
return $self->navHash("map_type_$pc", 0);	return $self->navHash("map_type_$pc", 0);
}	}



#####	#####
# Property queries	# Property queries
#####	#####
Line 2858 Get the Client IP/Name Access Control in	Line 3328 Get the Client IP/Name Access Control in

Get the answer-reveal date for the problem.	Get the answer-reveal date for the problem.

	=item * B<awarded>:

	Gets the awarded value for the problem part. Requires genUserData set to
	true when the navmap object was created.

=item * B<duedate>:	=item * B<duedate>:

Get the due date for the problem.	Get the due date for the problem.
Line 2911 sub answerdate {	Line 3386 sub answerdate {
}	}
return $self->parmval("answerdate", $part);	return $self->parmval("answerdate", $part);
}	}
sub awarded { my $self = shift; return $self->queryRestoreHash('awarded', shift); }	sub awarded {
	my $self = shift; my $part = shift;
	$self->{NAV_MAP}->get_user_data();
	if (!defined($part)) { $part = '0'; }
	return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.awarded'};
	}
sub duedate {	sub duedate {
(my $self, my $part) = @_;	(my $self, my $part) = @_;
return $self->parmval("duedate", $part);	return $self->parmval("duedate", $part);
Line 2928 sub opendate {	Line 3408 sub opendate {
}	}
return $self->parmval("opendate");	return $self->parmval("opendate");
}	}
	sub problemstatus {
	(my $self, my $part) = @_;
	return lc $self->parmval("problemstatus", $part);
	}
sub sig {	sub sig {
(my $self, my $part) = @_;	(my $self, my $part) = @_;
return $self->parmval("sig", $part);	return $self->parmval("sig", $part);
Line 2948 sub type {	Line 3432 sub type {
}	}
sub weight {	sub weight {
my $self = shift; my $part = shift;	my $self = shift; my $part = shift;
return $self->parmval("weight", $part);	if (!defined($part)) { $part = '0'; }
	return &Apache::lonnet::EXT('resource.'.$part.'.weight',
	$self->symb(), $ENV{'user.domain'},
	$ENV{'user.name'},
	$ENV{'request.course.sec'});

}	}

# Multiple things need this	# Multiple things need this
Line 3028 sub getErrors {	Line 3517 sub getErrors {
=item * B<parts>():	=item * B<parts>():

Returns a list reference containing sorted strings corresponding to	Returns a list reference containing sorted strings corresponding to
each part of the problem. To count the number of parts, use the list	each part of the problem. Single part problems have only a part '0'.
in a scalar context, and subtract one if greater than two. (One part	Multipart problems do not return their part '0', since they typically
problems have a part 0. Multi-parts have a part 0, plus a part for	do not really matter.
each part. Filtering part 0 if you want it is up to you.)

=item * B<countParts>():	=item * B<countParts>():

Returns the number of parts of the problem a student can answer. Thus,	Returns the number of parts of the problem a student can answer. Thus,
for single part problems, returns 1. For multipart, it returns the	for single part problems, returns 1. For multipart, it returns the
number of parts in the problem, not including psuedo-part 0. Thus,	number of parts in the problem, not including psuedo-part 0.
B<parts> may return an array with fewer parts in it then countParts
might lead you to believe.	=item * B<multipart>():

	Returns true if the problem is multipart, false otherwise. Use this instead
	of countParts if all you want is multipart/not multipart.

	=item * B<responseType>($part):

	Returns the response type of the part, without the word "response" on the
	end. Example return values: 'string', 'essay', 'numeric', etc.

	=item * B<responseIds>($part):

	Retreives the response IDs for the given part as an array reference containing
	strings naming the response IDs. This may be empty.

=back	=back

Line 3048 might lead you to believe.	Line 3549 might lead you to believe.
sub parts {	sub parts {
my $self = shift;	my $self = shift;

if ($self->ext) { return ['0']; }	if ($self->ext) { return []; }

$self->extractParts();	$self->extractParts();
return $self->{PARTS};	return $self->{PARTS};
Line 3058 sub countParts {	Line 3559 sub countParts {
my $self = shift;	my $self = shift;

my $parts = $self->parts();	my $parts = $self->parts();
my $delta = 0;
for my $part (@$parts) {	# If I left this here, then it's not necessary.
if ($part eq '0') { $delta--; }	#my $delta = 0;
}	#for my $part (@$parts) {
	# if ($part eq '0') { $delta--; }
	#}

if ($self->{RESOURCE_ERROR}) {	if ($self->{RESOURCE_ERROR}) {
return 0;	return 0;
}	}

return scalar(@{$parts}) + $delta;	return scalar(@{$parts}); # + $delta;
	}

	sub multipart {
	my $self = shift;
	return $self->countParts() > 1;
	}

	sub singlepart {
	my $self = shift;
	return $self->countParts() == 1;
}	}

# Private function: Extracts the parts information and saves it	sub responseType {
	my $self = shift;
	my $part = shift;

	$self->extractParts();
	if (defined($self->{RESPONSE_TYPES}->{$part})) {
	return @{$self->{RESPONSE_TYPES}->{$part}};
	} else {
	return undef;
	}
	}

	sub responseIds {
	my $self = shift;
	my $part = shift;

	$self->extractParts();
	if (defined($self->{RESPONSE_IDS}->{$part})) {
	return @{$self->{RESPONSE_IDS}->{$part}};
	} else {
	return undef;
	}
	}

	# Private function: Extracts the parts information, both part names and
	# part types, and saves it.
sub extractParts {	sub extractParts {
my $self = shift;	my $self = shift;

Line 3079 sub extractParts {	Line 3617 sub extractParts {

$self->{PARTS} = [];	$self->{PARTS} = [];

	my %parts;

# Retrieve part count, if this is a problem	# Retrieve part count, if this is a problem
if ($self->is_problem()) {	if ($self->is_problem()) {
	my $partorder = &Apache::lonnet::metadata($self->src(), 'partorder');
my $metadata = &Apache::lonnet::metadata($self->src(), 'packages');	my $metadata = &Apache::lonnet::metadata($self->src(), 'packages');
if (!$metadata) {
$self->{RESOURCE_ERROR} = 1;	if ($partorder) {
$self->{PARTS} = [];	my @parts;
return;	for my $part (split (/,/,$partorder)) {
}	if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
foreach (split(/\,/,$metadata)) {	push @parts, $part;
if ($_ =~ /^part_(.*)$/) {	$parts{$part} = 1;
my $part = $1;	}
# check to see if part is turned off.	}
if (! Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {	$self->{PARTS} = \@parts;
push @{$self->{PARTS}}, $1;	} else {
	if (!$metadata) {
	$self->{RESOURCE_ERROR} = 1;
	$self->{PARTS} = [];
	$self->{PART_TYPE} = {};
	return;
	}
	foreach (split(/\,/,$metadata)) {
	if ($_ =~ /^part_(.*)$/) {
	my $part = $1;
	# This floods the logs if it blows up
	if (defined($parts{$part})) {
	&Apache::lonnet::logthis("$part multiply defined in metadata for " . $self->symb());
	}

	# check to see if part is turned off.

	if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
	$parts{$part} = 1;
	}
	}
	}
	my @sortedParts = sort keys %parts;
	$self->{PARTS} = \@sortedParts;
	}


	my %responseIdHash;
	my %responseTypeHash;


	# Init the responseIdHash
	foreach (@{$self->{PARTS}}) {
	$responseIdHash{$_} = [];
	}

	# Now, the unfortunate thing about this is that parts, part name, and
	# response id are delimited by underscores, but both the part
	# name and response id can themselves have underscores in them.
	# So we have to use our knowlege of part names to figure out
	# where the part names begin and end, and even then, it is possible
	# to construct ambiguous situations.
	foreach (split /,/, $metadata) {
	if ($_ =~ /^([a-zA-Z]+)response_(.*)/) {
	my $responseType = $1;
	my $partStuff = $2;
	my $partIdSoFar = '';
	my @partChunks = split /_/, $partStuff;
	my $i = 0;
	for ($i = 0; $i < scalar(@partChunks); $i++) {
	if ($partIdSoFar) { $partIdSoFar .= '_'; }
	$partIdSoFar .= $partChunks[$i];
	if ($parts{$partIdSoFar}) {
	my @otherChunks = @partChunks[$i+1..$#partChunks];
	my $responseId = join('_', @otherChunks);
	push @{$responseIdHash{$partIdSoFar}}, $responseId;
	push @{$responseTypeHash{$partIdSoFar}}, $responseType;
	}
}	}
}	}
}	}
	$self->{RESPONSE_IDS} = \%responseIdHash;
	$self->{RESPONSE_TYPES} = \%responseTypeHash;
my @sortedParts = sort @{$self->{PARTS}};
$self->{PARTS} = \@sortedParts;
}	}

return;	return;
Line 3289 sub getCompletionStatus {	Line 3885 sub getCompletionStatus {

my $status = $self->queryRestoreHash('solved', shift);	my $status = $self->queryRestoreHash('solved', shift);

# Left as seperate if statements in case we ever do more with this	# Left as separate if statements in case we ever do more with this
if ($status eq 'correct_by_student') {return $self->CORRECT;}	if ($status eq 'correct_by_student') {return $self->CORRECT;}
if ($status eq 'correct_by_override') {return $self->CORRECT_BY_OVERRIDE; }	if ($status eq 'correct_by_override') {return $self->CORRECT_BY_OVERRIDE; }
if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }	if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }
Line 3303 sub queryRestoreHash {	Line 3899 sub queryRestoreHash {
my $self = shift;	my $self = shift;
my $hashentry = shift;	my $hashentry = shift;
my $part = shift;	my $part = shift;
$part = "0" if (!defined($part));	$part = "0" if (!defined($part) \|\| $part eq '');
return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});	return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});

$self->getReturnHash();	$self->getReturnHash();
Line 3318 B<Composite Status>	Line 3914 B<Composite Status>
Along with directly returning the date or completion status, the	Along with directly returning the date or completion status, the
resource object includes a convenience function B<status>() that will	resource object includes a convenience function B<status>() that will
combine the two status tidbits into one composite status that can	combine the two status tidbits into one composite status that can
represent the status of the resource as a whole. The precise logic is	represent the status of the resource as a whole. This method represents
	the concept of the thing we want to display to the user on the nav maps
	screen, which is a combination of completion and open status. The precise logic is
documented in the comments of the status method. The following results	documented in the comments of the status method. The following results
may be returned, all available as methods on the resource object	may be returned, all available as methods on the resource object
($res->NETWORK_FAILURE):	($res->NETWORK_FAILURE): In addition to the return values that match
	the date or completion status, this function can return "ANSWER_SUBMITTED"
	if that problemstatus parameter value is set to No, suppressing the
	incorrect/correct feedback.

=over 4	=over 4

Line 3380 The item is open and not yet tried.	Line 3981 The item is open and not yet tried.

The problem has been attempted.	The problem has been attempted.

	=item * B<ANSWER_SUBMITTED>:

	An answer has been submitted, but the student should not see it.

=back	=back

=cut	=cut

sub TRIES_LEFT { return 10; }	sub TRIES_LEFT { return 20; }
	sub ANSWER_SUBMITTED { return 21; }

sub status {	sub status {
my $self = shift;	my $self = shift;
Line 3397 sub status {	Line 4003 sub status {
# dimension and 5 entries on the other, which we want to colorize,	# dimension and 5 entries on the other, which we want to colorize,
# plus network failure and "no date data at all".	# plus network failure and "no date data at all".

	#if ($self->{RESOURCE_ERROR}) { return NETWORK_FAILURE; }
if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }	if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }

	my $suppressFeedback = $self->problemstatus($part) eq 'no';
	# If there's an answer date and we're past it, don't
	# suppress the feedback; student should know
	if ($self->answerdate($part) && $self->answerdate($part) < time()) {
	$suppressFeedback = 0;
	}

# There are a few whole rows we can dispose of:	# There are a few whole rows we can dispose of:
if ($completionStatus == CORRECT \|\|	if ($completionStatus == CORRECT \|\|
$completionStatus == CORRECT_BY_OVERRIDE ) {	$completionStatus == CORRECT_BY_OVERRIDE ) {
return CORRECT;	return $suppressFeedback? ANSWER_SUBMITTED : CORRECT;
}	}

if ($completionStatus == ATTEMPTED) {	if ($completionStatus == ATTEMPTED) {
Line 3441 sub status {	Line 4055 sub status {
if ($completionStatus == INCORRECT \|\| $completionStatus == INCORRECT_BY_OVERRIDE) {	if ($completionStatus == INCORRECT \|\| $completionStatus == INCORRECT_BY_OVERRIDE) {
# and there are TRIES LEFT:	# and there are TRIES LEFT:
if ($self->tries($part) < $self->maxtries($part) \|\| !$self->maxtries($part)) {	if ($self->tries($part) < $self->maxtries($part) \|\| !$self->maxtries($part)) {
return TRIES_LEFT;	return $suppressFeedback ? ANSWER_SUBMITTED : TRIES_LEFT;
}	}
return INCORRECT; # otherwise, return orange; student can't fix this	return $suppressFeedback ? ANSWER_SUBMITTED : INCORRECT; # otherwise, return orange; student can't fix this
}	}

# Otherwise, it's untried and open	# Otherwise, it's untried and open
return OPEN;	return OPEN;
}	}

	sub CLOSED { return 23; }
	sub ERROR { return 24; }

	=pod

	B<Simple Status>

	Convenience method B<simpleStatus> provides a "simple status" for the resource.
	"Simple status" corresponds to "which icon is shown on the
	Navmaps". There are six "simple" statuses:

	=over 4

	=item * B<CLOSED>: The problem is currently closed. (No icon shown.)

	=item * B<OPEN>: The problem is open and unattempted.

	=item * B<CORRECT>: The problem is correct for any reason.

	=item * B<INCORRECT>: The problem is incorrect and can still be
	completed successfully.

	=item * B<ATTEMPTED>: The problem has been attempted, but the student
	does not know if they are correct. (The ellipsis icon.)

	=item * B<ERROR>: There is an error retrieving information about this
	problem.

	=back

	=cut

	# This hash maps the composite status to this simple status, and
	# can be used directly, if you like
	my %compositeToSimple =
	(
	NETWORK_FAILURE() => ERROR,
	NOTHING_SET() => CLOSED,
	CORRECT() => CORRECT,
	EXCUSED() => CORRECT,
	PAST_DUE_NO_ANSWER() => INCORRECT,
	PAST_DUE_ANSWER_LATER() => INCORRECT,
	ANSWER_OPEN() => INCORRECT,
	OPEN_LATER() => CLOSED,
	TRIES_LEFT() => OPEN,
	INCORRECT() => INCORRECT,
	OPEN() => OPEN,
	ATTEMPTED() => ATTEMPTED,
	ANSWER_SUBMITTED() => ATTEMPTED
	);

	sub simpleStatus {
	my $self = shift;
	my $part = shift;
	my $status = $self->status($part);
	return $compositeToSimple{$status};
	}

	=pod

	B<simpleStatusCount> will return an array reference containing, in
	this order, the number of OPEN, CLOSED, CORRECT, INCORRECT, ATTEMPTED,
	and ERROR parts the given problem has.

	=cut

	# This maps the status to the slot we want to increment
	my %statusToSlotMap =
	(
	OPEN() => 0,
	CLOSED() => 1,
	CORRECT() => 2,
	INCORRECT() => 3,
	ATTEMPTED() => 4,
	ERROR() => 5
	);

	sub statusToSlot { return $statusToSlotMap{shift()}; }

	sub simpleStatusCount {
	my $self = shift;

	my @counts = (0, 0, 0, 0, 0, 0, 0);
	foreach my $part (@{$self->parts()}) {
	$counts[$statusToSlotMap{$self->simpleStatus($part)}]++;
	}

	return \@counts;
	}

	=pod

	B<Completable>

	The completable method represents the concept of I<whether the student can
	currently do the problem>. If the student can do the problem, which means
	that it is open, there are tries left, and if the problem is manually graded
	or the grade is suppressed via problemstatus, the student has not tried it
	yet, then the method returns 1. Otherwise, it returns 0, to indicate that
	either the student has tried it and there is no feedback, or that for
	some reason it is no longer completable (not open yet, successfully completed,
	out of tries, etc.). As an example, this is used as the filter for the
	"Uncompleted Homework" option for the nav maps.

	If this does not quite meet your needs, do not fiddle with it (unless you are
	fixing it to better match the student's conception of "completable" because
	it's broken somehow)... make a new method.

	=cut

	sub completable {
	my $self = shift;
	if (!$self->is_problem()) { return 0; }
	my $partCount = $self->countParts();

	foreach my $part (@{$self->parts()}) {
	if ($part eq '0' && $partCount != 1) { next; }
	my $status = $self->status($part);
	# "If any of the parts are open, or have tries left (implies open),
	# and it is not "attempted" (manually graded problem), it is
	# not "complete"
	if ($self->getCompletionStatus($part) == ATTEMPTED() \|\|
	$status == ANSWER_SUBMITTED() ) {
	# did this part already, as well as we can
	next;
	}
	if ($status == OPEN() \|\| $status == TRIES_LEFT()) {
	return 1;
	}
	}

	# If all the parts were complete, so was this problem.
	return 0;
	}

=pod	=pod

=head2 Resource/Nav Map Navigation	=head2 Resource/Nav Map Navigation

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>

Removed from v.1.176
changed lines
	Added in v.1.258