--- loncom/interface/lonhtmlcommon.pm 2003/06/18 15:02:20 1.24
+++ loncom/interface/lonhtmlcommon.pm 2004/02/20 17:03:38 1.55
@@ -1,7 +1,7 @@
# The LearningOnline Network with CAPA
# a pile of common html routines
#
-# $Id: lonhtmlcommon.pm,v 1.24 2003/06/18 15:02:20 www Exp $
+# $Id: lonhtmlcommon.pm,v 1.55 2004/02/20 17:03:38 matthew Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -56,6 +56,8 @@ html.
package Apache::lonhtmlcommon;
use Time::Local;
+use Time::HiRes;
+use Apache::lonlocal;
use strict;
##############################################
@@ -63,6 +65,115 @@ use strict;
=pod
+=item authorbombs
+
+=cut
+
+##############################################
+##############################################
+
+sub authorbombs {
+ my $url=shift;
+ $url=&Apache::lonnet::declutter($url);
+ my ($udom,$uname)=($url=~/^(\w+)\/(\w+)\//);
+ my %bombs=&Apache::lonmsg::all_url_author_res_msg($uname,$udom);
+ foreach (keys %bombs) {
+ if ($_=~/^$udom\/$uname\//) {
+ return '<a href="/adm/bombs/'.$url.
+ '"><img src="/adm/lonMisc/bomb.gif" border="0" /></a>'.
+ &Apache::loncommon::help_open_topic('About_Bombs');
+ }
+ }
+ return '';
+}
+
+##############################################
+##############################################
+
+sub recent_filename {
+ my $area=shift;
+ return 'nohist_recent_'.&Apache::lonnet::escape($area);
+}
+
+sub store_recent {
+ my ($area,$name,$value)=@_;
+ my $file=&recent_filename($area);
+ my %recent=&Apache::lonnet::dump($file);
+ if (scalar(keys(%recent))>10) {
+# remove oldest value
+ my $oldest=time;
+ my $delkey='';
+ foreach (keys %recent) {
+ my $thistime=(split(/\&/,$recent{$_}))[0];
+ if ($thistime<$oldest) {
+ $oldest=$thistime;
+ $delkey=$_;
+ }
+ }
+ &Apache::lonnet::del($file,[$delkey]);
+ }
+# store new value
+ &Apache::lonnet::put($file,{ $name =>
+ time.'&'.&Apache::lonnet::escape($value) });
+}
+
+sub select_recent {
+ my ($area,$fieldname,$event)=@_;
+ my %recent=&Apache::lonnet::dump(&recent_filename($area));
+ my $return="\n<select name='$fieldname'".
+ ($event?" onChange='$event'":'').
+ ">\n<option value=''>--- ".&mt('Recent')." ---</option>";
+ foreach (sort keys %recent) {
+ unless ($_=~/^error\:/) {
+ $return.="\n<option value='$_'>".
+ &Apache::lonnet::unescape((split(/\&/,$recent{$_}))[1]).
+ '</option>';
+ }
+ }
+ $return.="\n</select>\n";
+ return $return;
+}
+
+
+=pod
+
+=item textbox
+
+=cut
+
+##############################################
+##############################################
+sub textbox {
+ my ($name,$value,$size,$special) = @_;
+ $size = 40 if (! defined($size));
+ my $Str = '<input type="text" name="'.$name.'" size="'.$size.'" '.
+ 'value="'.$value.'" '.$special.' />';
+ return $Str;
+}
+
+##############################################
+##############################################
+
+=pod
+
+=item checkbox
+
+=cut
+
+##############################################
+##############################################
+sub checkbox {
+ my ($name,$value) = @_;
+ my $Str = '<input type="checkbox" name="'.$name.'"'.
+ ($value?' checked="1"':'').' />';
+ return $Str;
+}
+
+##############################################
+##############################################
+
+=pod
+
=item &date_setter
&date_setter returns html and javascript for a compact date-setting form.
@@ -85,6 +196,11 @@ The current setting for this time parame
An undefined value is taken to indicate the value is the current time.
Also, to be explicit, a value of 'now' also indicates the current time.
+=item $special
+
+Additional html/javascript to be associated with each element in
+the date_setter. See lonparmset for example usage.
+
=back
Bugs
@@ -96,14 +212,21 @@ The method used to restrict user input w
##############################################
##############################################
sub date_setter {
- my ($formname,$dname,$currentvalue) = @_;
+ my ($formname,$dname,$currentvalue,$special,$includeempty) = @_;
if (! defined($currentvalue) || $currentvalue eq 'now') {
- $currentvalue = time;
+ unless ($includeempty) {
+ $currentvalue = time;
+ } else {
+ $currentvalue = 0;
+ }
}
# other potentially useful values: wkday,yrday,is_daylight_savings
- my ($sec,$min,$hour,$mday,$month,$year,undef,undef,undef) =
- localtime($currentvalue);
- $year += 1900;
+ my ($sec,$min,$hour,$mday,$month,$year)=('','','','','','');
+ if ($currentvalue) {
+ ($sec,$min,$hour,$mday,$month,$year,undef,undef,undef) =
+ localtime($currentvalue);
+ $year += 1900;
+ }
my $result = "\n<!-- $dname date setting form -->\n";
$result .= <<ENDJS;
<script language="Javascript">
@@ -137,49 +260,64 @@ sub date_setter {
document.$formname.$dname\_day.value = 30;
}
}
+
+ function $dname\_opencalendar() {
+ var calwin=window.open(
+"/adm/announcements?pickdate=yes&formname=$formname&element=$dname&month="+
+document.$formname.$dname\_month.value+"&year="+
+document.$formname.$dname\_year.value,
+ "LONCAPAcal",
+ "height=350,width=350,scrollbars=yes,resizable=yes,menubar=no");
+
+ }
</script>
ENDJS
- $result .= " <select name=\"$dname\_month\" ".
+ $result .= " <nobr><select name=\"$dname\_month\" ".$special.' '.
"onChange=\"javascript:$dname\_checkday()\" >\n";
my @Months = qw/January February March April May June
July August September October November December/;
# Pad @Months with a bogus value to make indexing easier
unshift(@Months,'If you can read this an error occurred');
+ if ($includeempty) { $result.="<option value=''></option>"; }
for(my $m = 1;$m <=$#Months;$m++) {
$result .= " <option value=\"$m\" ";
- $result .= "selected " if ($m-1 == $month);
- $result .= "> $Months[$m] </option>\n";
+ $result .= "selected " if ($m-1 eq $month);
+ $result .= "> ".&mt($Months[$m])." </option>\n";
}
$result .= " </select>\n";
$result .= " <input type=\"text\" name=\"$dname\_day\" ".
- "value=\"$mday\" size=\"3\" ".
+ "value=\"$mday\" size=\"3\" ".$special.' '.
"onChange=\"javascript:$dname\_checkday()\" />\n";
$result .= " <input type=\"year\" name=\"$dname\_year\" ".
- "value=\"$year\" size=\"5\" ".
+ "value=\"$year\" size=\"5\" ".$special.' '.
"onChange=\"javascript:$dname\_checkday()\" />\n";
$result .= " ";
- $result .= " <select name=\"$dname\_hour\" >\n";
+ $result .= " <select name=\"$dname\_hour\" ".$special." >\n";
+ if ($includeempty) { $result.="<option value=''></option>"; }
for (my $h = 0;$h<24;$h++) {
$result .= " <option value=\"$h\" ";
$result .= "selected " if ($hour == $h);
$result .= "> ";
+ my $timest='';
if ($h == 0) {
- $result .= "12 am";
+ $timest .= "12 am";
} elsif($h == 12) {
- $result .= "12 noon";
+ $timest .= "12 noon";
} elsif($h < 12) {
- $result .= "$h am";
+ $timest .= "$h am";
} else {
- $result .= $h-12 ." pm";
+ $timest .= $h-12 ." pm";
}
- $result .= " </option>\n";
+ $timest=&mt($timest);
+ $result .= $timest." </option>\n";
}
$result .= " </select>\n";
- $result .= " <input type=\"text\" name=\"$dname\_minute\" ".
+ $result .= " <input type=\"text\" name=\"$dname\_minute\" ".$special.' '.
"value=\"$min\" size=\"3\" /> m\n";
- $result .= " <input type=\"text\" name=\"$dname\_second\" ".
+ $result .= " <input type=\"text\" name=\"$dname\_second\" ".$special.' '.
"value=\"$sec\" size=\"3\" /> s\n";
- $result .= "<!-- end $dname date setting form -->\n";
+ $result .= "<a href=\"javascript:$dname\_opencalendar()\">".
+ &mt('Select Date')."</a></nobr>\n<!-- end $dname date setting form -->\n";
return $result;
}
@@ -230,7 +368,7 @@ sub get_date_from_form {
}
if (defined($ENV{'form.'.$dname.'_hour'})) {
my $tmphour = $ENV{'form.'.$dname.'_hour'};
- if (($tmphour =~ /^\d+$/) && ($tmphour > 0) && ($tmphour < 32)) {
+ if (($tmphour =~ /^\d+$/) && ($tmphour >= 0) && ($tmphour < 24)) {
$hour = $tmphour;
}
}
@@ -253,7 +391,9 @@ sub get_date_from_form {
}
}
if (($year<70) || ($year>137)) { return undef; }
- if (eval(&timelocal($sec,$min,$hour,$day,$month,$year))) {
+ if (defined($sec) && defined($min) && defined($hour) &&
+ defined($day) && defined($month) && defined($year) &&
+ eval(&timelocal($sec,$min,$hour,$day,$month,$year))) {
return &timelocal($sec,$min,$hour,$day,$month,$year);
} else {
return undef;
@@ -341,6 +481,9 @@ the selection box is set to document.$fo
$size: the size (number of lines) of the selection box.
+$onchange: javascript to use when the value is changed. Enclosed in
+double quotes, ""s, not single quotes.
+
Returns: a perl string as described.
=cut
@@ -348,7 +491,7 @@ Returns: a perl string as described.
##############################################
##############################################
sub StatusOptions {
- my ($status, $formName,$size)=@_;
+ my ($status, $formName,$size,$onchange)=@_;
$size = 1 if (!defined($size));
if (! defined($status)) {
$status = 'Active';
@@ -365,215 +508,21 @@ sub StatusOptions {
my $Str = '';
$Str .= '<select name="Status"';
- if(defined($formName) && $formName ne '') {
+ if(defined($formName) && $formName ne '' && ! defined($onchange)) {
$Str .= ' onchange="document.'.$formName.'.submit()"';
}
+ if (defined($onchange)) {
+ $Str .= ' onchange="'.$onchange.'"';
+ }
$Str .= ' size="'.$size.'" ';
$Str .= '>'."\n";
$Str .= '<option value="Active" '.$OpSel1.'>'.
- 'Currently Enrolled</option>'."\n";
+ &mt('Currently Enrolled').'</option>'."\n";
$Str .= '<option value="Expired" '.$OpSel2.'>'.
- 'Previously Enrolled</option>'."\n";
+ &mt('Previously Enrolled').'</option>'."\n";
$Str .= '<option value="Any" '.$OpSel3.'>'.
- 'Any Enrollment Status</option>'."\n";
- $Str .= '</select>'."\n";
-}
-
-
-########################################################
-########################################################
-
-=pod
-
-=item &MultipleSectionSelect()
-
-Inputs:
-
-=over 4
-
-=item $sections A references to an array containing the names of all the
-sections used in a class.
-
-=item $selectedSections A reference to an array containing the names of the
-currently selected sections.
-
-=back
-
-Returns: a string containing HTML for a multiple select box for
-selecting sections of a course.
-
-The form element name is 'Section'. @$sections is sorted prior to output.
-
-=cut
-
-########################################################
-########################################################
-sub MultipleSectionSelect {
- my ($sections,$selectedSections)=@_;
-
- my $Str = '';
- $Str .= '<select name="Section" multiple="true" size="4">'."\n";
-
- foreach (sort @$sections) {
- $Str .= '<option';
- foreach my $selected (@$selectedSections) {
- if($_ eq $selected) {
- $Str .= ' selected=""';
- }
- }
- $Str .= '>'.$_.'</option>'."\n";
- }
+ &mt('Any Enrollment Status').'</option>'."\n";
$Str .= '</select>'."\n";
-
- return $Str;
-}
-
-########################################################
-########################################################
-
-=pod
-
-=item &Title()
-
-Inputs: $pageName a string containing the name of the page to be sent
-to &Apache::loncommon::bodytag.
-
-Returns: string containing being <html> and complete <head> and <title>
-as well as a <script> to focus the current window and change its width
-and height to 500. Why? I do not know. If you find out, please update
-this documentation.
-
-=cut
-
-########################################################
-########################################################
-sub Title {
- my ($pageName)=@_;
-
- my $Str = '';
-
- $Str .= '<html><head><title>'.$pageName.'</title></head>'."\n";
- $Str .= &Apache::loncommon::bodytag($pageName)."\n";
- $Str .= '<script>window.focus(); window.width=500;window.height=500;';
- $Str .= '</script>'."\n";
-
- return $Str;
-}
-
-########################################################
-########################################################
-
-=pod
-
-=item &CreateHeadings()
-
-This function generates the column headings for the chart.
-
-=over 4
-
-Inputs: $CacheData, $keyID, $headings, $spacePadding
-
-$CacheData: pointer to a hash tied to the cached data database
-
-$keyID: a pointer to an array containing the names of the data
-held in a column and is used as part of a key into $CacheData
-
-$headings: The names of the headings for the student information
-
-$spacePadding: The spaces to go between columns
-
-Output: $Str
-
-$Str: A formatted string of the table column headings.
-
-=back
-
-=cut
-
-########################################################
-########################################################
-sub CreateHeadings {
- my ($data,$keyID,$headings,$displayString,$format)=@_;
- my $Str='';
- my $formatting = '';
-
- for(my $index=0; $index<(scalar @$headings); $index++) {
- my $currentHeading=$headings->[$index];
- if($format eq 'preformatted') {
- my @dataLength=split(//,$currentHeading);
- my $length=scalar @dataLength;
- $formatting = (' 'x
- ($data->{$keyID->[$index].':columnWidth'}-$length));
- }
- my $linkdata=$keyID->[$index];
-
- my $tempString = $displayString;
- $tempString =~ s/LINKDATA/$linkdata/;
- $tempString =~ s/DISPLAYDATA/$currentHeading/;
- $tempString =~ s/FORMATTING/$formatting/;
-
- $Str .= $tempString;
- }
-
- return $Str;
-}
-
-########################################################
-########################################################
-
-=pod
-
-=item &FormatStudentInformation()
-
-This function produces a formatted string of the student\'s information:
-username, domain, section, full name, and PID.
-
-=over 4
-
-Input: $cache, $name, $keyID, $spacePadding
-
-$cache: This is a pointer to a hash that is tied to the cached data
-
-$name: The name and domain of the current student in name:domain format
-
-$keyID: A pointer to an array holding the names used to
-
-remove data from the hash. They represent the name of the data to be removed.
-
-$spacePadding: Extra spaces that represent the space between columns
-
-Output: $Str
-
-$Str: Formatted string.
-
-=back
-
-=cut
-
-########################################################
-########################################################
-sub FormatStudentInformation {
- my ($data,$name,$keyID,$displayString,$format)=@_;
- my $Str='';
- my $currentColumn;
-
- for(my $index=0; $index<(scalar @$keyID); $index++) {
- $currentColumn=$data->{$name.':'.$keyID->[$index]};
-
- if($format eq 'preformatted') {
- my @dataLength=split(//,$currentColumn);
- my $length=scalar @dataLength;
- $currentColumn.= (' 'x
- ($data->{$keyID->[$index].':columnWidth'}-$length));
- }
-
- my $tempString = $displayString;
- $tempString =~ s/DISPLAYDATA/$currentColumn/;
-
- $Str .= $tempString;
- }
-
- return $Str;
}
########################################################
@@ -607,6 +556,15 @@ Inputs
=item $number_to_do The total number of items being processed.
+=item $type Either 'popup' or 'inline' (popup is assumed if nothing is
+ specified)
+
+=item $width Specify the width in charaters of the input field.
+
+=item $formname Only useful in the inline case, if a form already exists, this needs to be used and specfiy the name of the form, otherwise the Progress line will be created in a new form of it's own
+
+=item $inputname Only useful in the inline case, if a form and an input of type text exists, use this to specify the name of the input field
+
=back
Returns a hash containing the progress state data structure.
@@ -675,37 +633,75 @@ Returns: none
########################################################
########################################################
+my $uniq=0;
+sub get_uniq_name {
+ $uniq++;
+ return 'uniquename'.$uniq;
+}
+
# Create progress
sub Create_PrgWin {
- my ($r, $title, $heading, $number_to_do)=@_;
- $r->print('<script>'.
- "popwin=open(\'\',\'popwin\',\'width=400,height=100\');".
- "popwin.document.writeln(\'<html><head><title>$title</title></head>".
+ my ($r, $title, $heading, $number_to_do,$type,$width,$formname,
+ $inputname)=@_;
+ if (!defined($type)) { $type='popup'; }
+ if (!defined($width)) { $width=55; }
+ my %prog_state;
+ $prog_state{'type'}=$type;
+ if ($type eq 'popup') {
+ $prog_state{'window'}='popwin';
+ #the whole function called through timeout is due to issues
+ #in mozilla Read BUG #2665 if you want to know the whole story
+ &r_print($r,'<script>'.
+ "var popwin;
+ function openpopwin () {
+ popwin=open(\'\',\'popwin\',\'width=400,height=100\');".
+ "popwin.document.writeln(\'<html><head><title>$title</title></head>".
"<body bgcolor=\"#88DDFF\">".
"<h4>$heading</h4>".
"<form name=popremain>".
- "<input type=text size=55 name=remaining value=Starting></form>".
+ '<input type="text" size="'.$width.'" name="remaining" value="'.
+ &mt('Starting').'"></form>'.
"</body></html>\');".
- "popwin.document.close();".
- "</script>");
+ "popwin.document.close();}".
+ "\nwindow.setTimeout(openpopwin,0)</script>");
+ $prog_state{'formname'}='popremain';
+ $prog_state{'inputname'}="remaining";
+ } elsif ($type eq 'inline') {
+ $prog_state{'window'}='window';
+ if (!$formname) {
+ $prog_state{'formname'}=&get_uniq_name();
+ &r_print($r,'<form name="'.$prog_state{'formname'}.'">');
+ } else {
+ $prog_state{'formname'}=$formname;
+ }
+ if (!$inputname) {
+ $prog_state{'inputname'}=&get_uniq_name();
+ &r_print($r,'<input type="text" name="'.$prog_state{'inputname'}.
+ '" size="'.$width.'" />');
+ } else {
+ $prog_state{'inputname'}=$inputname;
+
+ }
+ if (!$formname) { &r_print($r,'</form>'); }
+ &Update_PrgWin($r,\%prog_state,&mt('Starting'));
+ }
- my %prog_state;
$prog_state{'done'}=0;
$prog_state{'firststart'}=&Time::HiRes::time();
$prog_state{'laststart'}=&Time::HiRes::time();
$prog_state{'max'}=$number_to_do;
-
- $r->rflush();
+
return %prog_state;
}
# update progress
sub Update_PrgWin {
my ($r,$prog_state,$displayString)=@_;
- $r->print('<script>popwin.document.popremain.remaining.value="'.
- $displayString.'";</script>');
+ &r_print($r,'<script>'.$$prog_state{'window'}.'.document.'.
+ $$prog_state{'formname'}.'.'.
+ $$prog_state{'inputname'}.'.value="'.
+ $displayString.'";</script>');
$$prog_state{'laststart'}=&Time::HiRes::time();
- $r->rflush();
}
# increment progress state
@@ -719,14 +715,16 @@ sub Increment_PrgWin {
if (int ($time_est/60) > 0) {
my $min = int($time_est/60);
my $sec = $time_est % 60;
- $time_est = $min.' minutes';
- if ($sec > 1) {
- $time_est.= ', '.$sec.' seconds';
- } elsif ($sec > 0) {
- $time_est.= ', '.$sec.' second';
- }
+ $time_est = $min.' '.&mt('minutes');
+ if ($min < 10) {
+ if ($sec > 1) {
+ $time_est.= ', '.$sec.' '.&mt('seconds');
+ } elsif ($sec > 0) {
+ $time_est.= ', '.$sec.' '.&mt('second');
+ }
+ }
} else {
- $time_est .= ' seconds';
+ $time_est .= ' '.&mt('seconds');
}
my $lasttime = &Time::HiRes::time()-$$prog_state{'laststart'};
if ($lasttime > 9) {
@@ -737,25 +735,227 @@ sub Increment_PrgWin {
$lasttime = sprintf("%3.2f",$lasttime);
}
if ($lasttime == 1) {
- $lasttime = '('.$lasttime.' second for '.$extraInfo.')';
+ $lasttime = '('.$lasttime.' '.&mt('second for').' '.$extraInfo.')';
} else {
- $lasttime = '('.$lasttime.' seconds for '.$extraInfo.')';
+ $lasttime = '('.$lasttime.' '.&mt('seconds for').' '.$extraInfo.')';
}
- $r->print('<script>popwin.document.popremain.remaining.value="'.
- $$prog_state{'done'}.'/'.$$prog_state{'max'}.
- ': '.$time_est.' remaining '.$lasttime.'";'.'</script>');
+ #
+ my $user_browser = $ENV{'browser.type'} if (exists($ENV{'browser.type'}));
+ my $user_os = $ENV{'browser.os'} if (exists($ENV{'browser.os'}));
+ if (! defined($user_browser) || ! defined($user_os)) {
+ (undef,$user_browser,undef,undef,undef,$user_os) =
+ &Apache::loncommon::decode_user_agent();
+ }
+ if ($user_browser eq 'explorer' && $user_os =~ 'mac') {
+ $lasttime = '';
+ }
+ &r_print($r,'<script>'.$$prog_state{'window'}.'.document.'.
+ $$prog_state{'formname'}.'.'.
+ $$prog_state{'inputname'}.'.value="'.
+ $$prog_state{'done'}.'/'.$$prog_state{'max'}.
+ ': '.$time_est.' '.&mt('remaining').' '.$lasttime.'";'.'</script>');
$$prog_state{'laststart'}=&Time::HiRes::time();
- $r->rflush();
}
# close Progress Line
sub Close_PrgWin {
my ($r,$prog_state)=@_;
- $r->print('<script>popwin.close()</script>'."\n");
+ if ($$prog_state{'type'} eq 'popup') {
+ &r_print($r,'<script>popwin.close()</script>'."\n");
+ } elsif ($$prog_state{'type'} eq 'inline') {
+ &Update_PrgWin($r,$prog_state,&mt('Done'));
+ }
undef(%$prog_state);
- $r->rflush();
}
+sub r_print {
+ my ($r,$to_print)=@_;
+ if ($r) {
+ $r->print($to_print);
+ $r->rflush();
+ } else {
+ print($to_print);
+ }
+}
+
+# ------------------------------------------------------- Puts directory header
+
+sub crumbs {
+ my ($uri,$target,$prefix,$form)=@_;
+ my $output='<br /><tt><b><font size="+2">'.$prefix.'/';
+ if ($ENV{'user.adv'}) {
+ my $path=$prefix.'/';
+ foreach (split('/',$uri)) {
+ unless ($_) { next; }
+ $path.=$_;
+ unless ($path eq $uri) { $path.='/'; }
+ my $linkpath=$path;
+ if ($form) {
+ $linkpath="javascript:$form.action='$path';$form.submit();";
+ }
+ $output.='<a href="'.$linkpath.'"'.($target?' target="'.$target.'"':'').'>'.$_.'</a>/';
+ }
+ } else {
+ $output.=$uri;
+ }
+ unless ($uri=~/\/$/) { $output=~s/\/$//; }
+ return $output.'</font></b></tt><br />';
+}
+
+# ------------------------------------------------- Output headers for HTMLArea
+
+sub htmlareaheaders {
+ unless (&htmlareabrowser()) { return ''; }
+ my $lang='en';
+ return (<<ENDHEADERS);
+<script type="text/javascript" src="/htmlarea/htmlarea.js"></script>
+<script type="text/javascript" src="/htmlarea/lang/$lang.js"></script>
+<script type="text/javascript" src="/htmlarea/dialog.js"></script>
+<style type="text/css">
+\@import url(/htmlarea/htmlarea.css);
+</style>
+ENDHEADERS
+}
+
+# ---------------------------------------------------------- Script to activate
+
+sub htmlareaactive {
+ unless (&htmlareabrowser()) { return ''; }
+ return (<<ENDSCRIPT);
+<script type="text/javascript" defer="1">
+ HTMLArea.replaceAll();
+</script>
+ENDSCRIPT
+}
+
+# ---------------------------------------- Browser capable of running HTMLArea?
+
+sub htmlareabrowser {
+ return 1;
+}
+
+############################################################
+############################################################
+
+=pod
+
+=item breadcrumbs
+
+Compiles the previously registered breadcrumbs into an series of links.
+FAQ and BUG links will be placed on the left side of the table if they
+are defined for the last registered breadcrumb.
+Additionally supports a 'component', which will be displayed on the
+right side of the table (without a link).
+A link to help for the component will be included if one is specified.
+
+All inputs can be undef without problems.
+
+Inputs: $color (the background color of the table returned),
+ $component (the large text on the right side of the table),
+ $component_help
+
+Returns a string containing breadcrumbs for the current page.
+
+=item clear_breadcrumbs
+
+Clears the previously stored breadcrumbs.
+
+=item add_breadcrumb
+
+Pushes a breadcrumb on the stack of crumbs.
+
+input: $breadcrumb, a hash reference. The keys 'href','title', and 'text'
+are required. If present the keys 'faq' and 'bug' will be used to provide
+links to the FAQ and bug sites.
+
+returns: nothing
+
+=cut
+
+############################################################
+############################################################
+{
+ my @Crumbs;
+
+ sub breadcrumbs {
+ my ($color,$component,$component_help,$function,$domain) = @_;
+ if (! defined($color)) {
+ if (! defined($function)) {
+ $function = &Apache::loncommon::get_users_function();
+ }
+ $color = &Apache::loncommon::designparm($function.'.tabbg',
+ $domain);
+ }
+ #
+ my $Str = "\n".
+ '<table width="100%" border="0" cellpadding="0" cellspacing="0">'.
+ '<tr><td bgcolor="'.$color.'">'.
+ '<font size="-1">';
+ # The last breadcrumb does not have a link, so handle it seperately.
+ my $last = pop(@Crumbs);
+ # The first one should be the course, I guess.
+ if (exists($ENV{'request.course.id'})) {
+ my $cid = $ENV{'request.course.id'};
+ unshift(@Crumbs,{href=>'/adm/menu',
+ title=>'Go to main menu',
+ text=>$ENV{'course.'.$cid.'.description'},
+ });
+ }
+ my $links .=
+ join('->',
+ map {
+ '<a href="'.$_->{'href'}.'" title="'.$_->{'title'}.'">'.
+ $_->{'text'}.'</a>'
+ } @Crumbs
+ );
+ $links .= '->' if ($links ne '');
+ $links .= '<b>'.$last->{'text'}.'</b>';
+ #
+ my $icons = '';
+ if (exists($last->{'faq'})) {
+ $icons .= &Apache::loncommon::help_open_faq($last->{'faq'});
+ }
+ if (exists($last->{'bug'})) {
+ $icons .= &Apache::loncommon::help_open_bug($last->{'bug'});
+ }
+ if ($icons ne '') {
+ $Str .= $icons.' ';
+ }
+ #
+ $Str .= $links.'</font></td>';
+ #
+ if (defined($component)) {
+ $Str .= '<td align="right" bgcolor="'.$color.'">'.
+ '<font size="+1">'.$component.'</font>';
+ if (defined($component_help)) {
+ $Str .=
+ &Apache::loncommon::help_open_topic($component_help);
+ }
+ $Str.= '</td>';
+ }
+ $Str .= '</tr></table>'."\n";
+ #
+ # Return the @Crumbs stack to what we started with
+ push(@Crumbs,$last);
+ shift(@Crumbs);
+ #
+ return $Str;
+ }
+
+ sub clear_breadcrumbs {
+ undef(@Crumbs);
+ }
+
+ sub add_breadcrumb {
+ push (@Crumbs,@_);
+ }
+
+}
+
+############################################################
+############################################################
+
+
1;
__END__