Annotation of loncom/interface/lonhtmlcommon.pm, revision 1.97

1.2       www         1: # The LearningOnline Network with CAPA
                      2: # a pile of common html routines
                      3: #
1.97    ! albertel    4: # $Id: lonhtmlcommon.pm,v 1.96 2004/11/19 19:31:13 albertel Exp $
1.2       www         5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
1.10      matthew    28: ######################################################################
                     29: ######################################################################
                     30: 
                     31: =pod
                     32: 
                     33: =head1 NAME
                     34: 
                     35: Apache::lonhtmlcommon - routines to do common html things
                     36: 
                     37: =head1 SYNOPSIS
                     38: 
                     39: Referenced by other mod_perl Apache modules.
                     40: 
                     41: =head1 INTRODUCTION
                     42: 
                     43: lonhtmlcommon is a collection of subroutines used to present information
                     44: in a consistent html format, or provide other functionality related to
                     45: html.
                     46: 
                     47: =head2 General Subroutines
                     48: 
                     49: =over 4
                     50: 
                     51: =cut 
                     52: 
                     53: ######################################################################
                     54: ######################################################################
1.2       www        55: 
1.1       stredwic   56: package Apache::lonhtmlcommon;
                     57: 
1.10      matthew    58: use Time::Local;
1.47      sakharuk   59: use Time::HiRes;
1.30      www        60: use Apache::lonlocal;
1.1       stredwic   61: use strict;
                     62: 
1.40      www        63: ##############################################
                     64: ##############################################
                     65: 
                     66: =pod
                     67: 
                     68: =item authorbombs
                     69: 
                     70: =cut
                     71: 
                     72: ##############################################
                     73: ##############################################
                     74: 
                     75: sub authorbombs {
                     76:     my $url=shift;
                     77:     $url=&Apache::lonnet::declutter($url);
                     78:     my ($udom,$uname)=($url=~/^(\w+)\/(\w+)\//);
                     79:     my %bombs=&Apache::lonmsg::all_url_author_res_msg($uname,$udom);
                     80:     foreach (keys %bombs) {
                     81: 	if ($_=~/^$udom\/$uname\//) {
                     82: 	    return '<a href="/adm/bombs/'.$url.
                     83: 		'"><img src="/adm/lonMisc/bomb.gif" border="0" /></a>'.
                     84: 		&Apache::loncommon::help_open_topic('About_Bombs');
                     85: 	}
                     86:     }
                     87:     return '';
                     88: }
1.26      matthew    89: 
                     90: ##############################################
                     91: ##############################################
                     92: 
1.41      www        93: sub recent_filename {
                     94:     my $area=shift;
                     95:     return 'nohist_recent_'.&Apache::lonnet::escape($area);
                     96: }
                     97: 
                     98: sub store_recent {
                     99:     my ($area,$name,$value)=@_;
                    100:     my $file=&recent_filename($area);
                    101:     my %recent=&Apache::lonnet::dump($file);
                    102:     if (scalar(keys(%recent))>10) {
                    103: # remove oldest value
                    104: 	my $oldest=time;
                    105: 	my $delkey='';
                    106: 	foreach (keys %recent) {
                    107: 	    my $thistime=(split(/\&/,$recent{$_}))[0];
                    108: 	    if ($thistime<$oldest) {
                    109: 		$oldest=$thistime;
                    110: 		$delkey=$_;
                    111: 	    }
                    112: 	}
                    113: 	&Apache::lonnet::del($file,[$delkey]);
                    114:     }
                    115: # store new value
                    116:     &Apache::lonnet::put($file,{ $name => 
                    117: 				 time.'&'.&Apache::lonnet::escape($value) });
                    118: }
                    119: 
1.89      banghart  120: sub remove_recent {
                    121:     my ($area,$names)=@_;
                    122:     my $file=&recent_filename($area);
                    123:     return &Apache::lonnet::del($file,$names);
                    124: }
                    125: 
1.41      www       126: sub select_recent {
                    127:     my ($area,$fieldname,$event)=@_;
                    128:     my %recent=&Apache::lonnet::dump(&recent_filename($area));
                    129:     my $return="\n<select name='$fieldname'".
1.96      albertel  130: 	($event?" onchange='$event'":'').
1.41      www       131: 	">\n<option value=''>--- ".&mt('Recent')." ---</option>";
                    132:     foreach (sort keys %recent) {
                    133: 	unless ($_=~/^error\:/) {
1.94      foxr      134: 	    my $escaped = &Apache::loncommon::escape_url($_);
                    135: 	    $return.="\n<option value='$escaped'>".
1.41      www       136: 		&Apache::lonnet::unescape((split(/\&/,$recent{$_}))[1]).
                    137: 		'</option>';
                    138: 	}
                    139:     }
                    140:     $return.="\n</select>\n";
                    141:     return $return;
                    142: }
                    143: 
1.97    ! albertel  144: sub get_recent {
        !           145:     my ($area, $n) = @_;
        !           146:     my %recent=&Apache::lonnet::dump(&recent_filename($area));
        !           147: 
        !           148: # Create hash with key as time and recent as value
        !           149:     my %time_hash = ();
        !           150:     foreach (keys %recent) {
        !           151:         my $thistime=(split(/\&/,$recent{$_}))[0];
        !           152:         $time_hash{$thistime} = $_;
        !           153:     }
        !           154: 
        !           155: # Sort by decreasing time and return key value pairs
        !           156:     my %return_hash = ();
        !           157:     my $idx = 1;
        !           158:     foreach (reverse sort keys %time_hash) {
        !           159:        $return_hash{$time_hash{$_}} =
        !           160:                   &Apache::lonnet::unescape((split(/\&/,$recent{$_}))[1]);
        !           161:        if ($n && ($idx++ >= $n)) {last;}
        !           162:     }
        !           163: 
        !           164:     return %return_hash;
        !           165: }
        !           166: 
        !           167: 
1.41      www       168: 
1.26      matthew   169: =pod
                    170: 
                    171: =item textbox
                    172: 
                    173: =cut
                    174: 
                    175: ##############################################
                    176: ##############################################
                    177: sub textbox {
                    178:     my ($name,$value,$size,$special) = @_;
                    179:     $size = 40 if (! defined($size));
                    180:     my $Str = '<input type="text" name="'.$name.'" size="'.$size.'" '.
                    181:         'value="'.$value.'" '.$special.' />';
                    182:     return $Str;
                    183: }
                    184: 
                    185: ##############################################
                    186: ##############################################
                    187: 
                    188: =pod
                    189: 
                    190: =item checkbox
                    191: 
                    192: =cut
                    193: 
                    194: ##############################################
                    195: ##############################################
                    196: sub checkbox {
1.68      matthew   197:     my ($name,$checked,$value) = @_;
                    198:     my $Str = '<input type="checkbox" name="'.$name.'" ';
                    199:     if (defined($value)) {
                    200:         $Str .= 'value="'.$value.'"';
                    201:     } 
                    202:     if ($checked) {
                    203:         $Str .= ' checked="1"';
                    204:     }
                    205:     $Str .= ' />';
1.26      matthew   206:     return $Str;
                    207: }
                    208: 
1.10      matthew   209: ##############################################
                    210: ##############################################
                    211: 
                    212: =pod
                    213: 
                    214: =item &date_setter
                    215: 
1.22      matthew   216: &date_setter returns html and javascript for a compact date-setting form.
                    217: To retrieve values from it, use &get_date_from_form().
                    218: 
1.10      matthew   219: Inputs
                    220: 
                    221: =over 4
                    222: 
                    223: =item $dname 
                    224: 
                    225: The name to prepend to the form elements.  
                    226: The form elements defined will be dname_year, dname_month, dname_day,
                    227: dname_hour, dname_min, and dname_sec.
                    228: 
                    229: =item $currentvalue
                    230: 
                    231: The current setting for this time parameter.  A unix format time
                    232: (time in seconds since the beginning of Jan 1st, 1970, GMT.  
                    233: An undefined value is taken to indicate the value is the current time.
                    234: Also, to be explicit, a value of 'now' also indicates the current time.
                    235: 
1.26      matthew   236: =item $special
                    237: 
                    238: Additional html/javascript to be associated with each element in
                    239: the date_setter.  See lonparmset for example usage.
                    240: 
1.59      matthew   241: =item $includeempty 
                    242: 
                    243: =item $state
                    244: 
                    245: Specifies the initial state of the form elements.  Either 'disabled' or empty.
                    246: Defaults to empty, which indiciates the form elements are not disabled. 
                    247: 
1.22      matthew   248: =back
                    249: 
                    250: Bugs
                    251: 
                    252: The method used to restrict user input will fail in the year 2400.
                    253: 
1.10      matthew   254: =cut
                    255: 
                    256: ##############################################
                    257: ##############################################
                    258: sub date_setter {
1.67      matthew   259:     my ($formname,$dname,$currentvalue,$special,$includeempty,$state,
                    260:         $no_hh_mm_ss) = @_;
1.59      matthew   261:     if (! defined($state) || $state ne 'disabled') {
                    262:         $state = '';
                    263:     }
1.67      matthew   264:     if (! defined($no_hh_mm_ss)) {
                    265:         $no_hh_mm_ss = 0;
                    266:     }
1.10      matthew   267:     if (! defined($currentvalue) || $currentvalue eq 'now') {
1.39      www       268: 	unless ($includeempty) {
                    269: 	    $currentvalue = time;
                    270: 	} else {
                    271: 	    $currentvalue = 0;
                    272: 	}
1.10      matthew   273:     }
                    274:     # other potentially useful values:     wkday,yrday,is_daylight_savings
1.65      albertel  275:     my ($sec,$min,$hour,$mday,$month,$year)=('','',undef,'','','');
1.39      www       276:     if ($currentvalue) {
                    277: 	($sec,$min,$hour,$mday,$month,$year,undef,undef,undef) = 
                    278: 	    localtime($currentvalue);
                    279: 	$year += 1900;
                    280:     }
1.10      matthew   281:     my $result = "\n<!-- $dname date setting form -->\n";
                    282:     $result .= <<ENDJS;
                    283: <script language="Javascript">
                    284:     function $dname\_checkday() {
                    285:         var day   = document.$formname.$dname\_day.value;
                    286:         var month = document.$formname.$dname\_month.value;
                    287:         var year  = document.$formname.$dname\_year.value;
                    288:         var valid = true;
                    289:         if (day < 1) {
                    290:             document.$formname.$dname\_day.value = 1;
                    291:         } 
                    292:         if (day > 31) {
                    293:             document.$formname.$dname\_day.value = 31;
                    294:         }
                    295:         if ((month == 1)  || (month == 3)  || (month == 5)  ||
                    296:             (month == 7)  || (month == 8)  || (month == 10) ||
                    297:             (month == 12)) {
                    298:             if (day > 31) {
                    299:                 document.$formname.$dname\_day.value = 31;
                    300:                 day = 31;
                    301:             }
                    302:         } else if (month == 2 ) {
                    303:             if ((year % 4 == 0) && (year % 100 != 0)) {
                    304:                 if (day > 29) {
                    305:                     document.$formname.$dname\_day.value = 29;
                    306:                 }
                    307:             } else if (day > 29) {
                    308:                 document.$formname.$dname\_day.value = 28;
                    309:             }
                    310:         } else if (day > 30) {
                    311:             document.$formname.$dname\_day.value = 30;
                    312:         }
                    313:     }
1.95      matthew   314:     
1.59      matthew   315:     function $dname\_disable() {
                    316:         document.$formname.$dname\_month.disabled=true;
                    317:         document.$formname.$dname\_day.disabled=true;
                    318:         document.$formname.$dname\_year.disabled=true;
                    319:         document.$formname.$dname\_hour.disabled=true;
                    320:         document.$formname.$dname\_minute.disabled=true;
                    321:         document.$formname.$dname\_second.disabled=true;
                    322:     }
                    323: 
                    324:     function $dname\_enable() {
                    325:         document.$formname.$dname\_month.disabled=false;
                    326:         document.$formname.$dname\_day.disabled=false;
                    327:         document.$formname.$dname\_year.disabled=false;
                    328:         document.$formname.$dname\_hour.disabled=false;
                    329:         document.$formname.$dname\_minute.disabled=false;
                    330:         document.$formname.$dname\_second.disabled=false;        
                    331:     }
                    332: 
1.29      www       333:     function $dname\_opencalendar() {
1.59      matthew   334:         if (! document.$formname.$dname\_month.disabled) {
                    335:             var calwin=window.open(
1.29      www       336: "/adm/announcements?pickdate=yes&formname=$formname&element=$dname&month="+
                    337: document.$formname.$dname\_month.value+"&year="+
                    338: document.$formname.$dname\_year.value,
                    339:              "LONCAPAcal",
                    340:               "height=350,width=350,scrollbars=yes,resizable=yes,menubar=no");
1.59      matthew   341:         }
1.29      www       342: 
                    343:     }
1.10      matthew   344: </script>
                    345: ENDJS
1.95      matthew   346:     $result .= '  <nobr>';
1.96      albertel  347:     my $monthselector = qq{<select name="$dname\_month" $special $state onchange="javascript:$dname\_checkday()" >};
1.67      matthew   348:     # Month
1.10      matthew   349:     my @Months = qw/January February  March     April   May      June 
                    350:                     July    August    September October November December/;
                    351:     # Pad @Months with a bogus value to make indexing easier
                    352:     unshift(@Months,'If you can read this an error occurred');
1.95      matthew   353:     if ($includeempty) { $monthselector.="<option value=''></option>"; }
1.10      matthew   354:     for(my $m = 1;$m <=$#Months;$m++) {
1.95      matthew   355:         $monthselector .= qq{      <option value="$m" };
                    356:         $monthselector .= "selected " if ($m-1 eq $month);
                    357:         $monthselector .= '> '.&mt($Months[$m]).' </option>';
1.10      matthew   358:     }
1.95      matthew   359:     $monthselector.= '  </select>';
1.67      matthew   360:     # Day
1.96      albertel  361:     my $dayselector = qq{<input type="text" name="$dname\_day" $state value="$mday" size="3" $special onchange="javascript:$dname\_checkday()" />};
1.67      matthew   362:     # Year
1.96      albertel  363:     my $yearselector = qq{<input type="year" name="$dname\_year" $state value="$year" size="5" $special onchange="javascript:$dname\_checkday()" />};
1.95      matthew   364:     #
                    365:     my $hourselector = qq{<select name="$dname\_hour" $special $state >};
                    366:     if ($includeempty) { 
                    367:         $hourselector.=qq{<option value=''></option>};
                    368:     }
                    369:     for (my $h = 0;$h<24;$h++) {
                    370:         $hourselector .= qq{<option value="$h" };
                    371:         $hourselector .= "selected " if (defined($hour) && $hour == $h);
                    372:         $hourselector .= ">";
                    373:         my $timest='';
                    374:         if ($h == 0) {
                    375:             $timest .= "12 am";
                    376:         } elsif($h == 12) {
                    377:             $timest .= "12 noon";
                    378:         } elsif($h < 12) {
                    379:             $timest .= "$h am";
                    380:         } else {
                    381:             $timest .= $h-12 ." pm";
                    382:         }
                    383:         $timest=&mt($timest);
                    384:         $hourselector .= $timest." </option>\n";
                    385:     }
                    386:     $hourselector .= "  </select>\n";
                    387:     my $minuteselector = qq{<input type="text" name="$dname\_minute" $special $state value="$min" size="3" />};
                    388:     my $secondselector= qq{<input type="text" name="$dname\_second" $special $state value="$sec" size="3" />};
                    389:     my $cal_link = qq{<a href="javascript:$dname\_opencalendar()">};
                    390:     #
                    391:     if ($no_hh_mm_ss) {
                    392:         $result .= &mt('[_1] [_2] [_3] [_4]Select Date[_5]',
                    393:                        $monthselector,$dayselector,$yearselector,
                    394:                        $cal_link,'</a>');
                    395:     } else {
                    396:         $result .= &mt('[_1] [_2] [_3] [_4] [_5]m [_6]s [_7]Select Date[_8]',
                    397:                        $monthselector,$dayselector,$yearselector,
                    398:                        $hourselector,$minuteselector,$secondselector,
                    399:                        $cal_link,'</a>');
1.67      matthew   400:     }
1.95      matthew   401:     $result .= "</nobr>\n<!-- end $dname date setting form -->\n";
1.10      matthew   402:     return $result;
                    403: }
                    404: 
                    405: ##############################################
                    406: ##############################################
                    407: 
1.22      matthew   408: =pod
                    409: 
1.10      matthew   410: =item &get_date_from_form
1.22      matthew   411: 
                    412: get_date_from_form retrieves the date specified in an &date_setter form.
1.10      matthew   413: 
                    414: Inputs:
                    415: 
                    416: =over 4
                    417: 
                    418: =item $dname
                    419: 
                    420: The name passed to &datesetter, which prefixes the form elements.
                    421: 
                    422: =item $defaulttime
                    423: 
                    424: The unix time to use as the default in case of poor inputs.
                    425: 
                    426: =back
                    427: 
                    428: Returns: Unix time represented in the form.
                    429: 
                    430: =cut
                    431: 
                    432: ##############################################
                    433: ##############################################
                    434: sub get_date_from_form {
                    435:     my ($dname) = @_;
                    436:     my ($sec,$min,$hour,$day,$month,$year);
                    437:     #
                    438:     if (defined($ENV{'form.'.$dname.'_second'})) {
                    439:         my $tmpsec = $ENV{'form.'.$dname.'_second'};
                    440:         if (($tmpsec =~ /^\d+$/) && ($tmpsec >= 0) && ($tmpsec < 60)) {
                    441:             $sec = $tmpsec;
                    442:         }
1.64      albertel  443: 	if (!defined($tmpsec) || $tmpsec eq '') { $sec = 0; }
1.67      matthew   444:     } else {
                    445:         $sec = 0;
1.10      matthew   446:     }
                    447:     if (defined($ENV{'form.'.$dname.'_minute'})) {
                    448:         my $tmpmin = $ENV{'form.'.$dname.'_minute'};
                    449:         if (($tmpmin =~ /^\d+$/) && ($tmpmin >= 0) && ($tmpmin < 60)) {
                    450:             $min = $tmpmin;
                    451:         }
1.64      albertel  452: 	if (!defined($tmpmin) || $tmpmin eq '') { $min = 0; }
1.67      matthew   453:     } else {
                    454:         $min = 0;
1.10      matthew   455:     }
                    456:     if (defined($ENV{'form.'.$dname.'_hour'})) {
                    457:         my $tmphour = $ENV{'form.'.$dname.'_hour'};
1.33      matthew   458:         if (($tmphour =~ /^\d+$/) && ($tmphour >= 0) && ($tmphour < 24)) {
1.10      matthew   459:             $hour = $tmphour;
                    460:         }
1.67      matthew   461:     } else {
                    462:         $hour = 0;
1.10      matthew   463:     }
                    464:     if (defined($ENV{'form.'.$dname.'_day'})) {
                    465:         my $tmpday = $ENV{'form.'.$dname.'_day'};
                    466:         if (($tmpday =~ /^\d+$/) && ($tmpday > 0) && ($tmpday < 32)) {
                    467:             $day = $tmpday;
                    468:         }
                    469:     }
                    470:     if (defined($ENV{'form.'.$dname.'_month'})) {
                    471:         my $tmpmonth = $ENV{'form.'.$dname.'_month'};
                    472:         if (($tmpmonth =~ /^\d+$/) && ($tmpmonth > 0) && ($tmpmonth < 13)) {
                    473:             $month = $tmpmonth - 1;
                    474:         }
                    475:     }
                    476:     if (defined($ENV{'form.'.$dname.'_year'})) {
                    477:         my $tmpyear = $ENV{'form.'.$dname.'_year'};
                    478:         if (($tmpyear =~ /^\d+$/) && ($tmpyear > 1900)) {
                    479:             $year = $tmpyear - 1900;
                    480:         }
                    481:     }
1.24      www       482:     if (($year<70) || ($year>137)) { return undef; }
1.33      matthew   483:     if (defined($sec) && defined($min)   && defined($hour) &&
                    484:         defined($day) && defined($month) && defined($year) &&
                    485:         eval(&timelocal($sec,$min,$hour,$day,$month,$year))) {
1.10      matthew   486:         return &timelocal($sec,$min,$hour,$day,$month,$year);
                    487:     } else {
                    488:         return undef;
                    489:     }
1.20      matthew   490: }
                    491: 
                    492: ##############################################
                    493: ##############################################
                    494: 
                    495: =pod
                    496: 
                    497: =item &pjump_javascript_definition()
                    498: 
                    499: Returns javascript defining the 'pjump' function, which opens up a
                    500: parameter setting wizard.
                    501: 
                    502: =cut
                    503: 
                    504: ##############################################
                    505: ##############################################
                    506: sub pjump_javascript_definition {
                    507:     my $Str = <<END;
                    508:     function pjump(type,dis,value,marker,ret,call) {
                    509:         parmwin=window.open("/adm/rat/parameter.html?type="+escape(type)
                    510:                  +"&value="+escape(value)+"&marker="+escape(marker)
                    511:                  +"&return="+escape(ret)
                    512:                  +"&call="+escape(call)+"&name="+escape(dis),"LONCAPAparms",
                    513:                  "height=350,width=350,scrollbars=no,menubar=no");
                    514:     }
                    515: END
                    516:     return $Str;
1.10      matthew   517: }
                    518: 
                    519: ##############################################
                    520: ##############################################
1.17      matthew   521: 
                    522: =pod
                    523: 
                    524: =item &javascript_nothing()
                    525: 
                    526: Return an appropriate null for the users browser.  This is used
                    527: as the first arguement for window.open calls when you want a blank
                    528: window that you can then write to.
                    529: 
                    530: =cut
                    531: 
                    532: ##############################################
                    533: ##############################################
                    534: sub javascript_nothing {
                    535:     # mozilla and other browsers work with "''", but IE on mac does not.
                    536:     my $nothing = "''";
                    537:     my $user_browser;
                    538:     my $user_os;
                    539:     $user_browser = $ENV{'browser.type'} if (exists($ENV{'browser.type'}));
                    540:     $user_os      = $ENV{'browser.os'}   if (exists($ENV{'browser.os'}));
                    541:     if (! defined($user_browser) || ! defined($user_os)) {
                    542:         (undef,$user_browser,undef,undef,undef,$user_os) = 
                    543:                            &Apache::loncommon::decode_user_agent();
                    544:     }
                    545:     if ($user_browser eq 'explorer' && $user_os =~ 'mac') {
                    546:         $nothing = "'javascript:void(0);'";
                    547:     }
                    548:     return $nothing;
                    549: }
                    550: 
1.90      www       551: ##############################################
                    552: ##############################################
                    553: sub javascript_docopen {
                    554:     # safari does not understand document.open() and loads "text/html"
                    555:     my $nothing = "''";
                    556:     my $user_browser;
                    557:     my $user_os;
                    558:     $user_browser = $ENV{'browser.type'} if (exists($ENV{'browser.type'}));
                    559:     $user_os      = $ENV{'browser.os'}   if (exists($ENV{'browser.os'}));
                    560:     if (! defined($user_browser) || ! defined($user_os)) {
                    561:         (undef,$user_browser,undef,undef,undef,$user_os) = 
                    562:                            &Apache::loncommon::decode_user_agent();
                    563:     }
                    564:     if ($user_browser eq 'safari' && $user_os =~ 'mac') {
                    565:         $nothing = "document.clear()";
                    566:     } else {
                    567: 	$nothing = "document.open('text/html','replace')";
                    568:     }
                    569:     return $nothing;
                    570: }
                    571: 
1.21      matthew   572: 
1.17      matthew   573: ##############################################
                    574: ##############################################
                    575: 
1.21      matthew   576: =pod
1.17      matthew   577: 
1.21      matthew   578: =item &StatusOptions()
1.10      matthew   579: 
1.21      matthew   580: Returns html for a selection box which allows the user to choose the
                    581: enrollment status of students.  The selection box name is 'Status'.
1.6       stredwic  582: 
1.21      matthew   583: Inputs:
1.6       stredwic  584: 
1.21      matthew   585: $status: the currently selected status.  If undefined the value of
                    586: $ENV{'form.Status'} is taken.  If that is undefined, a value of 'Active'
                    587: is used.
1.6       stredwic  588: 
1.21      matthew   589: $formname: The name of the form.  If defined the onchange attribute of
                    590: the selection box is set to document.$formname.submit().
1.6       stredwic  591: 
1.21      matthew   592: $size: the size (number of lines) of the selection box.
1.6       stredwic  593: 
1.27      matthew   594: $onchange: javascript to use when the value is changed.  Enclosed in 
                    595: double quotes, ""s, not single quotes.
                    596: 
1.21      matthew   597: Returns: a perl string as described.
1.1       stredwic  598: 
1.21      matthew   599: =cut
1.9       stredwic  600: 
1.21      matthew   601: ##############################################
                    602: ##############################################
                    603: sub StatusOptions {
1.27      matthew   604:     my ($status, $formName,$size,$onchange)=@_;
1.21      matthew   605:     $size = 1 if (!defined($size));
                    606:     if (! defined($status)) {
                    607:         $status = 'Active';
                    608:         $status = $ENV{'form.Status'} if (exists($ENV{'form.Status'}));
1.9       stredwic  609:     }
1.1       stredwic  610: 
                    611:     my $OpSel1 = '';
                    612:     my $OpSel2 = '';
                    613:     my $OpSel3 = '';
                    614: 
                    615:     if($status eq 'Any')         { $OpSel3 = ' selected'; }
                    616:     elsif($status eq 'Expired' ) { $OpSel2 = ' selected'; }
                    617:     else                         { $OpSel1 = ' selected'; }
                    618: 
                    619:     my $Str = '';
                    620:     $Str .= '<select name="Status"';
1.27      matthew   621:     if(defined($formName) && $formName ne '' && ! defined($onchange)) {
1.1       stredwic  622:         $Str .= ' onchange="document.'.$formName.'.submit()"';
1.27      matthew   623:     }
                    624:     if (defined($onchange)) {
                    625:         $Str .= ' onchange="'.$onchange.'"';
1.1       stredwic  626:     }
1.21      matthew   627:     $Str .= ' size="'.$size.'" ';
1.1       stredwic  628:     $Str .= '>'."\n";
1.21      matthew   629:     $Str .= '<option value="Active" '.$OpSel1.'>'.
1.37      www       630:         &mt('Currently Enrolled').'</option>'."\n";
1.21      matthew   631:     $Str .= '<option value="Expired" '.$OpSel2.'>'.
1.37      www       632:         &mt('Previously Enrolled').'</option>'."\n";
1.21      matthew   633:     $Str .= '<option value="Any" '.$OpSel3.'>'.
1.37      www       634:         &mt('Any Enrollment Status').'</option>'."\n";
1.1       stredwic  635:     $Str .= '</select>'."\n";
1.7       stredwic  636: }
1.12      matthew   637: 
                    638: ########################################################
                    639: ########################################################
1.7       stredwic  640: 
1.23      matthew   641: =pod
                    642: 
                    643: =item Progess Window Handling Routines
                    644: 
                    645: These routines handle the creation, update, increment, and closure of 
                    646: progress windows.  The progress window reports to the user the number
                    647: of items completed and an estimate of the time required to complete the rest.
                    648: 
                    649: =over 4
                    650: 
                    651: 
                    652: =item &Create_PrgWin
                    653: 
                    654: Writes javascript to the client to open a progress window and returns a
                    655: data structure used for bookkeeping.
                    656: 
                    657: Inputs
                    658: 
                    659: =over 4
                    660: 
                    661: =item $r Apache request
                    662: 
                    663: =item $title The title of the progress window
                    664: 
                    665: =item $heading A description (usually 1 line) of the process being initiated.
                    666: 
                    667: =item $number_to_do The total number of items being processed.
1.50      albertel  668: 
                    669: =item $type Either 'popup' or 'inline' (popup is assumed if nothing is
                    670:        specified)
                    671: 
1.51      albertel  672: =item $width Specify the width in charaters of the input field.
                    673: 
1.50      albertel  674: =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
                    675: 
                    676: =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 
1.23      matthew   677: 
                    678: =back
                    679: 
                    680: Returns a hash containing the progress state data structure.
                    681: 
                    682: 
                    683: =item &Update_PrgWin
                    684: 
                    685: Updates the text in the progress indicator.  Does not increment the count.
                    686: See &Increment_PrgWin.
                    687: 
                    688: Inputs:
                    689: 
                    690: =over 4
                    691: 
                    692: =item $r Apache request
                    693: 
                    694: =item $prog_state Pointer to the data structure returned by &Create_PrgWin
                    695: 
                    696: =item $displaystring The string to write to the status indicator
                    697: 
                    698: =back
                    699: 
                    700: Returns: none
                    701: 
                    702: 
                    703: =item Increment_PrgWin
                    704: 
                    705: Increment the count of items completed for the progress window by 1.  
                    706: 
                    707: Inputs:
                    708: 
                    709: =over 4
                    710: 
                    711: =item $r Apache request
                    712: 
                    713: =item $prog_state Pointer to the data structure returned by Create_PrgWin
                    714: 
                    715: =item $extraInfo A description of the items being iterated over.  Typically
                    716: 'student'.
                    717: 
                    718: =back
                    719: 
                    720: Returns: none
                    721: 
                    722: 
                    723: =item Close_PrgWin
                    724: 
                    725: Closes the progress window.
                    726: 
                    727: Inputs:
                    728: 
                    729: =over 4 
                    730: 
                    731: =item $r Apache request
                    732: 
                    733: =item $prog_state Pointer to the data structure returned by Create_PrgWin
                    734: 
                    735: =back
                    736: 
                    737: Returns: none
                    738: 
                    739: =back
                    740: 
                    741: =cut
                    742: 
                    743: ########################################################
                    744: ########################################################
                    745: 
1.51      albertel  746: my $uniq=0;
                    747: sub get_uniq_name {
                    748:     $uniq++;
                    749:     return 'uniquename'.$uniq;
                    750: }
                    751: 
1.7       stredwic  752: # Create progress
                    753: sub Create_PrgWin {
1.51      albertel  754:     my ($r, $title, $heading, $number_to_do,$type,$width,$formname,
                    755: 	$inputname)=@_;
1.49      albertel  756:     if (!defined($type)) { $type='popup'; }
1.51      albertel  757:     if (!defined($width)) { $width=55; }
1.49      albertel  758:     my %prog_state;
                    759:     $prog_state{'type'}=$type;
                    760:     if ($type eq 'popup') {
                    761: 	$prog_state{'window'}='popwin';
                    762: 	#the whole function called through timeout is due to issues
                    763: 	#in mozilla Read BUG #2665 if you want to know the whole story
                    764: 	&r_print($r,'<script>'.
                    765:         "var popwin;
                    766:          function openpopwin () {
                    767:          popwin=open(\'\',\'popwin\',\'width=400,height=100\');".
                    768:         "popwin.document.writeln(\'<html><head><title>$title</title></head>".
1.48      albertel  769: 	      "<body bgcolor=\"#88DDFF\">".
                    770:               "<h4>$heading</h4>".
                    771:               "<form name=popremain>".
1.51      albertel  772:               '<input type="text" size="'.$width.'" name="remaining" value="'.
1.48      albertel  773: 	      &mt('Starting').'"></form>'.
                    774:               "</body></html>\');".
1.49      albertel  775:         "popwin.document.close();}".
                    776:         "\nwindow.setTimeout(openpopwin,0)</script>");
                    777: 	$prog_state{'formname'}='popremain';
                    778: 	$prog_state{'inputname'}="remaining";
                    779:     } elsif ($type eq 'inline') {
                    780: 	$prog_state{'window'}='window';
                    781: 	if (!$formname) {
1.51      albertel  782: 	    $prog_state{'formname'}=&get_uniq_name();
                    783: 	    &r_print($r,'<form name="'.$prog_state{'formname'}.'">');
1.49      albertel  784: 	} else {
                    785: 	    $prog_state{'formname'}=$formname;
                    786: 	}
                    787: 	if (!$inputname) {
1.51      albertel  788: 	    $prog_state{'inputname'}=&get_uniq_name();
1.56      albertel  789: 	    &r_print($r,$heading.' <input type="text" name="'.$prog_state{'inputname'}.
1.51      albertel  790: 		     '" size="'.$width.'" />');
1.49      albertel  791: 	} else {
                    792: 	    $prog_state{'inputname'}=$inputname;
                    793: 	    
                    794: 	}
                    795: 	if (!$formname) { &r_print($r,'</form>'); }
                    796: 	&Update_PrgWin($r,\%prog_state,&mt('Starting'));
                    797:     }
1.7       stredwic  798: 
1.16      albertel  799:     $prog_state{'done'}=0;
1.23      matthew   800:     $prog_state{'firststart'}=&Time::HiRes::time();
                    801:     $prog_state{'laststart'}=&Time::HiRes::time();
1.16      albertel  802:     $prog_state{'max'}=$number_to_do;
1.49      albertel  803:     
1.14      albertel  804:     return %prog_state;
1.7       stredwic  805: }
                    806: 
                    807: # update progress
                    808: sub Update_PrgWin {
1.14      albertel  809:     my ($r,$prog_state,$displayString)=@_;
1.49      albertel  810:     &r_print($r,'<script>'.$$prog_state{'window'}.'.document.'.
                    811: 	     $$prog_state{'formname'}.'.'.
                    812: 	     $$prog_state{'inputname'}.'.value="'.
1.48      albertel  813: 	     $displayString.'";</script>');
1.23      matthew   814:     $$prog_state{'laststart'}=&Time::HiRes::time();
1.14      albertel  815: }
                    816: 
                    817: # increment progress state
                    818: sub Increment_PrgWin {
                    819:     my ($r,$prog_state,$extraInfo)=@_;
1.16      albertel  820:     $$prog_state{'done'}++;
1.23      matthew   821:     my $time_est= (&Time::HiRes::time() - $$prog_state{'firststart'})/
                    822:         $$prog_state{'done'} *
1.16      albertel  823: 	($$prog_state{'max'}-$$prog_state{'done'});
                    824:     $time_est = int($time_est);
1.80      matthew   825:     #
                    826:     my $min = int($time_est/60);
                    827:     my $sec = $time_est % 60;
                    828:     # 
                    829:     my $str;
1.91      albertel  830:     if ($min == 0 && $sec > 1) {
1.80      matthew   831:         $str = '[_2] seconds';
1.91      albertel  832:     } elsif ($min == 1 && $sec > 1) {
                    833:         $str = '1 minute [_2] seconds';
1.80      matthew   834:     } elsif ($min == 1 && $sec < 2) {
                    835:         $str = '1 minute';
                    836:     } elsif ($min < 10 && $sec > 1) {
                    837:         $str = '[_1] minutes, [_2] seconds';
1.81      matthew   838:     } elsif ($min >= 10 || $sec < 2) {
1.80      matthew   839:         $str = '[_1] minutes';
1.16      albertel  840:     }
1.80      matthew   841:     $time_est = &mt($str,$min,$sec);
                    842:     #
1.23      matthew   843:     my $lasttime = &Time::HiRes::time()-$$prog_state{'laststart'};
                    844:     if ($lasttime > 9) {
                    845:         $lasttime = int($lasttime);
                    846:     } elsif ($lasttime < 0.01) {
                    847:         $lasttime = 0;
                    848:     } else {
                    849:         $lasttime = sprintf("%3.2f",$lasttime);
                    850:     }
1.19      matthew   851:     if ($lasttime == 1) {
1.32      www       852:         $lasttime = '('.$lasttime.' '.&mt('second for').' '.$extraInfo.')';
1.19      matthew   853:     } else {
1.32      www       854:         $lasttime = '('.$lasttime.' '.&mt('seconds for').' '.$extraInfo.')';
1.28      matthew   855:     }
                    856:     #
                    857:     my $user_browser = $ENV{'browser.type'} if (exists($ENV{'browser.type'}));
                    858:     my $user_os      = $ENV{'browser.os'}   if (exists($ENV{'browser.os'}));
                    859:     if (! defined($user_browser) || ! defined($user_os)) {
                    860:         (undef,$user_browser,undef,undef,undef,$user_os) = 
                    861:                            &Apache::loncommon::decode_user_agent();
                    862:     }
                    863:     if ($user_browser eq 'explorer' && $user_os =~ 'mac') {
                    864:         $lasttime = '';
1.19      matthew   865:     }
1.49      albertel  866:     &r_print($r,'<script>'.$$prog_state{'window'}.'.document.'.
                    867: 	     $$prog_state{'formname'}.'.'.
                    868: 	     $$prog_state{'inputname'}.'.value="'.
1.48      albertel  869: 	     $$prog_state{'done'}.'/'.$$prog_state{'max'}.
                    870: 	     ': '.$time_est.' '.&mt('remaining').' '.$lasttime.'";'.'</script>');
1.23      matthew   871:     $$prog_state{'laststart'}=&Time::HiRes::time();
1.7       stredwic  872: }
                    873: 
                    874: # close Progress Line
                    875: sub Close_PrgWin {
1.14      albertel  876:     my ($r,$prog_state)=@_;
1.49      albertel  877:     if ($$prog_state{'type'} eq 'popup') {
                    878: 	&r_print($r,'<script>popwin.close()</script>'."\n");
                    879:     } elsif ($$prog_state{'type'} eq 'inline') {
                    880: 	&Update_PrgWin($r,$prog_state,&mt('Done'));
                    881:     }
1.48      albertel  882:     undef(%$prog_state);
                    883: }
                    884: 
                    885: sub r_print {
                    886:     my ($r,$to_print)=@_;
                    887:     if ($r) {
                    888: 	$r->print($to_print);
                    889: 	$r->rflush();
1.47      sakharuk  890:     } else {
1.48      albertel  891: 	print($to_print);
1.47      sakharuk  892:     }
1.1       stredwic  893: }
1.34      www       894: 
                    895: # ------------------------------------------------------- Puts directory header
                    896: 
                    897: sub crumbs {
1.78      www       898:     my ($uri,$target,$prefix,$form,$size,$noformat)=@_;
1.62      matthew   899:     if (! defined($size)) {
                    900:         $size = '+2';
                    901:     }
1.78      www       902:     my $output='';
                    903:     unless ($noformat) { $output.='<br /><tt><b>'; }
                    904:     $output.='<font size="'.$size.'">'.$prefix.'/';
1.35      www       905:     if ($ENV{'user.adv'}) {
1.43      www       906: 	my $path=$prefix.'/';
1.35      www       907: 	foreach (split('/',$uri)) {
                    908: 	    unless ($_) { next; }
1.43      www       909: 	    $path.=$_;
                    910: 	    unless ($path eq $uri) { $path.='/'; }
1.41      www       911: 	    my $linkpath=$path;
                    912: 	    if ($form) {
1.94      foxr      913: 		my $escaped_path = &Apache::loncommon::escape_single($path);
                    914: 		$linkpath="javascript:$form.action='$escaped_path';$form.submit();";
1.41      www       915: 	    }
1.94      foxr      916: 	    my $escaped_linkpath = &Apache::loncommon::escape_single($linkpath);
                    917: 	    my $escaped_target   = &Apache::loncommon::escape_single($target);
                    918: 	    $output.='<a href="'.$escaped_linkpath.'"'.($target?' target="'.$escaped_target.'"':'').'>'.$_.'</a>/';
1.35      www       919: 	}
                    920:     } else {
                    921: 	$output.=$uri;
1.34      www       922:     }
1.36      www       923:     unless ($uri=~/\/$/) { $output=~s/\/$//; }
1.78      www       924:     return $output.'</font>'.($noformat?'':'</b></tt><br />');
1.34      www       925: }
                    926: 
1.85      www       927: # --------------------- A function that generates a window for the spellchecker
                    928: 
                    929: sub spellheader {
                    930:     my $nothing = &javascript_nothing();
                    931:     return (<<ENDCHECK);
                    932: <script type="text/javascript"> 
1.92      albertel  933: //<!-- BEGIN LON-CAPA Internal
1.85      www       934: var checkwin;
                    935: 
                    936: function spellcheckerwindow() {
                    937:     checkwin=window.open($nothing,'spellcheckwin','height=320,width=280,resizable=yes,scrollbars=yes,location=no,menubar=no,toolbar=no');
                    938:     checkwin.document.writeln('<html><body bgcolor="#DDDDDD"><form name="spellcheckform" action="/adm/spellcheck" method="post"><input type="hidden" name="text" value="" /></form></body></html>');
                    939:     checkwin.document.close();
                    940: }
1.92      albertel  941: // END LON-CAPA Internal -->
1.85      www       942: </script>
                    943: ENDCHECK
                    944: }
                    945: 
                    946: # ---------------------------------- Generate link to spell checker for a field
                    947: 
                    948: sub spelllink {
                    949:     my ($form,$field)=@_;
                    950:     my $linktext=&mt('Check Spelling');
                    951:     return (<<ENDLINK);
                    952: <a href="javascript:if (typeof(document.$form.onsubmit)!='undefined') { document.$form.onsubmit();};spellcheckerwindow();checkwin.document.forms.spellcheckform.text.value=this.document.forms.$form.$field.value;checkwin.document.forms.spellcheckform.submit();">$linktext</a>
                    953: ENDLINK
                    954: }
                    955: 
1.52      www       956: # ------------------------------------------------- Output headers for HTMLArea
                    957: 
                    958: sub htmlareaheaders {
1.71      www       959:     if (&htmlareablocked()) { return ''; }
1.76      www       960:     unless (&htmlareabrowser()) { return ''; }
1.52      www       961:     my $lang='en';
1.71      www       962:     if (&mt('htmlarea_lang') ne 'htmlarea_lang') {
                    963: 	$lang=&mt('htmlarea_lang');
                    964:     }
1.52      www       965:     return (<<ENDHEADERS);
1.61      www       966: <script type="text/javascript">
1.73      www       967: _editor_url='/htmlarea/';
                    968: _editor_lang='$lang';
1.61      www       969: </script>
1.52      www       970: <script type="text/javascript" src="/htmlarea/htmlarea.js"></script>
                    971: ENDHEADERS
                    972: }
                    973: 
1.74      www       974: # ------------------------------------------------- Activate additional buttons
                    975: 
                    976: sub htmlareaaddbuttons {
                    977:     if (&htmlareablocked()) { return ''; }
1.76      www       978:     unless (&htmlareabrowser()) { return ''; }
1.74      www       979:     return (<<ENDADDBUTTON);
                    980:     var config=new HTMLArea.Config();
                    981:     config.registerButton('ed_math','LaTeX Inline',
                    982: 			  '/htmlarea/images/ed_math.gif',false,
                    983: 			    function(editor,id) {
1.88      albertel  984: 			      editor.surroundHTML('&nbsp;<m>\$','\$</m>&nbsp;');
1.74      www       985: 			    }
                    986: 			  );
                    987:     config.registerButton('ed_math_eqn','LaTeX Equation',
                    988: 			  '/htmlarea/images/ed_math_eqn.gif',false,
                    989: 			    function(editor,id) {
1.75      www       990: 			      editor.surroundHTML(
1.88      albertel  991: 				     '&nbsp;\\n<center><m>\\\\[','\\\\]</m></center>\\n&nbsp;');
1.74      www       992: 			    }
                    993: 			  );
                    994:     config.toolbar.push(['ed_math','ed_math_eqn']);
                    995: ENDADDBUTTON
                    996: }
1.76      www       997: 
                    998: # ----------------------------------------------------------------- Preferences
                    999: 
                   1000: sub disablelink {
1.77      www      1001:     my @fields=@_;
                   1002:     if (defined($#fields)) {
                   1003: 	unless ($#fields>=0) { return ''; }
                   1004:     }
1.93      albertel 1005:     return '<a href="'.&HTML::Entities::encode('/adm/preferences?action=set_wysiwyg&wysiwyg=off&returnurl=','<>&"').&Apache::lonnet::escape($ENV{'REQUEST_URI'}).'">'.&mt('Disable WYSIWYG Editor').'</a>';
1.76      www      1006: }
                   1007: 
                   1008: sub enablelink {
1.77      www      1009:     my @fields=@_;
                   1010:     if (defined($#fields)) {
                   1011: 	unless ($#fields>=0) { return ''; }
                   1012:     }
1.93      albertel 1013:     return '<a href="'.&HTML::Entities::encode('/adm/preferences?action=set_wysiwyg&wysiwyg=on&returnurl=','<>&"').&Apache::lonnet::escape($ENV{'REQUEST_URI'}).'">'.&mt('Enable WYSIWYG Editor').'</a>';
1.76      www      1014: }
                   1015: 
1.72      www      1016: # ----------------------------------------- Script to activate only some fields
                   1017: 
                   1018: sub htmlareaselectactive {
1.73      www      1019:     my @fields=@_;
1.76      www      1020:     unless (&htmlareabrowser()) { return ''; }
1.77      www      1021:     if (&htmlareablocked()) { return '<br />'.&enablelink(@fields); }
1.74      www      1022:     my $output='<script type="text/javascript" defer="1">'.
                   1023: 	&htmlareaaddbuttons();
1.73      www      1024:     foreach(@fields) {
1.74      www      1025: 	$output.="\nHTMLArea.replace('$_',config);";
1.72      www      1026:     }
1.76      www      1027:     $output.="\nwindow.status='Activated Editfields';\n</script><br />".
1.77      www      1028: 	&disablelink(@fields);
1.72      www      1029:     return $output;
                   1030: }
                   1031: 
1.61      www      1032: # --------------------------------------------------------------------- Blocked
                   1033: 
                   1034: sub htmlareablocked {
1.76      www      1035:     unless ($ENV{'environment.wysiwygeditor'} eq 'on') { return 1; }
1.71      www      1036:     return 0;
1.52      www      1037: }
                   1038: 
                   1039: # ---------------------------------------- Browser capable of running HTMLArea?
                   1040: 
                   1041: sub htmlareabrowser {
                   1042:     return 1;
                   1043: }
1.53      matthew  1044: 
                   1045: ############################################################
                   1046: ############################################################
                   1047: 
                   1048: =pod
                   1049: 
                   1050: =item breadcrumbs
                   1051: 
                   1052: Compiles the previously registered breadcrumbs into an series of links.
                   1053: FAQ and BUG links will be placed on the left side of the table if they
                   1054: are defined for the last registered breadcrumb.  
                   1055: Additionally supports a 'component', which will be displayed on the
                   1056: right side of the table (without a link).
                   1057: A link to help for the component will be included if one is specified.
                   1058: 
                   1059: All inputs can be undef without problems.
                   1060: 
                   1061: Inputs: $color (the background color of the table returned),
                   1062:         $component (the large text on the right side of the table),
                   1063:         $component_help
1.63      albertel 1064:         $function (role to get colors from)
                   1065:         $domain   (domian of role)
                   1066:         $menulink (boolean, controls whether to include a link to /adm/menu)
1.53      matthew  1067: 
                   1068: Returns a string containing breadcrumbs for the current page.
                   1069: 
                   1070: =item clear_breadcrumbs
                   1071: 
                   1072: Clears the previously stored breadcrumbs.
                   1073: 
                   1074: =item add_breadcrumb
                   1075: 
                   1076: Pushes a breadcrumb on the stack of crumbs.
                   1077: 
                   1078: input: $breadcrumb, a hash reference.  The keys 'href','title', and 'text'
                   1079: are required.  If present the keys 'faq' and 'bug' will be used to provide
                   1080: links to the FAQ and bug sites.
                   1081: 
                   1082: returns: nothing    
                   1083: 
                   1084: =cut
                   1085: 
                   1086: ############################################################
                   1087: ############################################################
                   1088: {
                   1089:     my @Crumbs;
1.57      matthew  1090:     
1.53      matthew  1091:     sub breadcrumbs {
1.87      albertel 1092:         my ($color,$component,$component_help,$function,$domain,$menulink,
                   1093: 	    $helplink) = @_;
1.55      matthew  1094:         if (! defined($color)) {
                   1095:             if (! defined($function)) {
                   1096:                 $function = &Apache::loncommon::get_users_function();
                   1097:             }
                   1098:             $color = &Apache::loncommon::designparm($function.'.tabbg',
                   1099:                                                     $domain);
                   1100:         }
1.53      matthew  1101:         #
                   1102:         my $Str = "\n".
                   1103:             '<table width="100%" border="0" cellpadding="0" cellspacing="0">'.
                   1104:             '<tr><td bgcolor="'.$color.'">'.
                   1105:             '<font size="-1">';
1.57      matthew  1106:         #
                   1107:         # Make the faq and bug data cascade
                   1108:         my $faq = '';
                   1109:         my $bug = '';
1.60      www      1110:         # The last breadcrumb does not have a link, so handle it separately.
1.53      matthew  1111:         my $last = pop(@Crumbs);
1.57      matthew  1112:         #
1.70      matthew  1113:         # The first one should be the course or a menu link
1.63      albertel 1114: 	if (!defined($menulink)) { $menulink=1; }
1.70      matthew  1115:         if ($menulink) {
                   1116:             my $description = 'Menu';
                   1117:             if (exists($ENV{'request.course.id'}) && 
                   1118:                 $ENV{'request.course.id'} ne '') {
                   1119:                 $description = 
                   1120:                     $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
                   1121:             }
1.57      matthew  1122:             unshift(@Crumbs,{
1.70      matthew  1123:                     href   =>'/adm/menu',
                   1124:                     title  =>'Go to main menu',
                   1125:                     target =>'_top',
                   1126:                     text   =>$description,
                   1127:                 });
1.53      matthew  1128:         }
                   1129:         my $links .= 
                   1130:             join('-&gt;',
                   1131:                  map {
1.57      matthew  1132:                      $faq = $_->{'faq'} if (exists($_->{'faq'}));
                   1133:                      $bug = $_->{'bug'} if (exists($_->{'bug'}));
1.69      matthew  1134:                      my $result = '<a href="'.$_->{'href'}.'" ';
                   1135:                      if (defined($_->{'target'}) && $_->{'target'} ne '') {
                   1136:                          $result .= 'target="'.$_->{'target'}.'" ';
                   1137:                      }
                   1138:                      $result .='title="'.&mt($_->{'title'}).'">'.
                   1139:                          &mt($_->{'text'}).'</a>';
                   1140:                      $result;
1.53      matthew  1141:                      } @Crumbs
                   1142:                  );
                   1143:         $links .= '-&gt;' if ($links ne '');
1.82      albertel 1144:         $links .= '<b>'.&mt($last->{'text'}).'</b>';
1.54      matthew  1145:         #
                   1146:         my $icons = '';
1.57      matthew  1147:         $faq = $last->{'faq'} if (exists($last->{'faq'}));
                   1148:         $bug = $last->{'bug'} if (exists($last->{'bug'}));
1.79      raeburn  1149: #        if ($faq ne '') {
                   1150: #            $icons .= &Apache::loncommon::help_open_faq($faq);
                   1151: #        }
                   1152: #        if ($bug ne '') {
                   1153: #            $icons .= &Apache::loncommon::help_open_bug($bug);
                   1154: #        }
1.87      albertel 1155: 	if ($helplink ne 'nohelp') {
                   1156: 	    $icons .= &Apache::loncommon::help_open_menu($color,$component,$component_help,$function,$faq,$bug);
                   1157: 	}
1.54      matthew  1158:         if ($icons ne '') {
                   1159:             $Str .= $icons.'&nbsp;';
1.53      matthew  1160:         }
1.54      matthew  1161:         #
1.53      matthew  1162:         $Str .= $links.'</font></td>';
1.54      matthew  1163:         #
1.53      matthew  1164:         if (defined($component)) {
                   1165:             $Str .= '<td align="right" bgcolor="'.$color.'">'.
1.83      raeburn  1166:                 '<font size="+1">'.&mt($component).'</font></td>';
1.53      matthew  1167:         }
                   1168:         $Str .= '</tr></table>'."\n";
                   1169:         #
                   1170:         # Return the @Crumbs stack to what we started with
                   1171:         push(@Crumbs,$last);
                   1172:         shift(@Crumbs);
                   1173:         #
                   1174:         return $Str;
                   1175:     }
                   1176: 
                   1177:     sub clear_breadcrumbs {
                   1178:         undef(@Crumbs);
                   1179:     }
                   1180: 
                   1181:     sub add_breadcrumb {
                   1182:         push (@Crumbs,@_);
                   1183:     }
                   1184: 
1.57      matthew  1185: } # End of scope for @Crumbs
1.53      matthew  1186: 
                   1187: ############################################################
                   1188: ############################################################
                   1189: 
1.1       stredwic 1190: 
                   1191: 1;
1.23      matthew  1192: 
1.1       stredwic 1193: __END__

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