Annotation of loncom/interface/lonhtmlcommon.pm, revision 1.26

1.2       www         1: # The LearningOnline Network with CAPA
                      2: # a pile of common html routines
                      3: #
1.26    ! matthew     4: # $Id: lonhtmlcommon.pm,v 1.25 2003/06/19 15:02:37 matthew 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;
1.1       stredwic   59: use strict;
                     60: 
1.26    ! matthew    61: 
        !            62: ##############################################
        !            63: ##############################################
        !            64: 
        !            65: =pod
        !            66: 
        !            67: =item textbox
        !            68: 
        !            69: =cut
        !            70: 
        !            71: ##############################################
        !            72: ##############################################
        !            73: sub textbox {
        !            74:     my ($name,$value,$size,$special) = @_;
        !            75:     $size = 40 if (! defined($size));
        !            76:     my $Str = '<input type="text" name="'.$name.'" size="'.$size.'" '.
        !            77:         'value="'.$value.'" '.$special.' />';
        !            78:     return $Str;
        !            79: }
        !            80: 
        !            81: ##############################################
        !            82: ##############################################
        !            83: 
        !            84: =pod
        !            85: 
        !            86: =item checkbox
        !            87: 
        !            88: =cut
        !            89: 
        !            90: ##############################################
        !            91: ##############################################
        !            92: sub checkbox {
        !            93:     my ($name) = @_;
        !            94:     my $Str = '<input type="checkbox" name="'.$name.'" />';
        !            95:     return $Str;
        !            96: }
        !            97: 
        !            98: 
        !            99: 
1.10      matthew   100: ##############################################
                    101: ##############################################
                    102: 
                    103: =pod
                    104: 
                    105: =item &date_setter
                    106: 
1.22      matthew   107: &date_setter returns html and javascript for a compact date-setting form.
                    108: To retrieve values from it, use &get_date_from_form().
                    109: 
1.10      matthew   110: Inputs
                    111: 
                    112: =over 4
                    113: 
                    114: =item $dname 
                    115: 
                    116: The name to prepend to the form elements.  
                    117: The form elements defined will be dname_year, dname_month, dname_day,
                    118: dname_hour, dname_min, and dname_sec.
                    119: 
                    120: =item $currentvalue
                    121: 
                    122: The current setting for this time parameter.  A unix format time
                    123: (time in seconds since the beginning of Jan 1st, 1970, GMT.  
                    124: An undefined value is taken to indicate the value is the current time.
                    125: Also, to be explicit, a value of 'now' also indicates the current time.
                    126: 
1.26    ! matthew   127: =item $special
        !           128: 
        !           129: Additional html/javascript to be associated with each element in
        !           130: the date_setter.  See lonparmset for example usage.
        !           131: 
1.22      matthew   132: =back
                    133: 
                    134: Bugs
                    135: 
                    136: The method used to restrict user input will fail in the year 2400.
                    137: 
1.10      matthew   138: =cut
                    139: 
                    140: ##############################################
                    141: ##############################################
                    142: sub date_setter {
1.26    ! matthew   143:     my ($formname,$dname,$currentvalue,$special) = @_;
1.10      matthew   144:     if (! defined($currentvalue) || $currentvalue eq 'now') {
                    145:         $currentvalue = time;
                    146:     }
                    147:     # other potentially useful values:     wkday,yrday,is_daylight_savings
                    148:     my ($sec,$min,$hour,$mday,$month,$year,undef,undef,undef) = 
                    149:         localtime($currentvalue);
                    150:     $year += 1900;
                    151:     my $result = "\n<!-- $dname date setting form -->\n";
                    152:     $result .= <<ENDJS;
                    153: <script language="Javascript">
                    154:     function $dname\_checkday() {
                    155:         var day   = document.$formname.$dname\_day.value;
                    156:         var month = document.$formname.$dname\_month.value;
                    157:         var year  = document.$formname.$dname\_year.value;
                    158:         var valid = true;
                    159:         if (day < 1) {
                    160:             document.$formname.$dname\_day.value = 1;
                    161:         } 
                    162:         if (day > 31) {
                    163:             document.$formname.$dname\_day.value = 31;
                    164:         }
                    165:         if ((month == 1)  || (month == 3)  || (month == 5)  ||
                    166:             (month == 7)  || (month == 8)  || (month == 10) ||
                    167:             (month == 12)) {
                    168:             if (day > 31) {
                    169:                 document.$formname.$dname\_day.value = 31;
                    170:                 day = 31;
                    171:             }
                    172:         } else if (month == 2 ) {
                    173:             if ((year % 4 == 0) && (year % 100 != 0)) {
                    174:                 if (day > 29) {
                    175:                     document.$formname.$dname\_day.value = 29;
                    176:                 }
                    177:             } else if (day > 29) {
                    178:                 document.$formname.$dname\_day.value = 28;
                    179:             }
                    180:         } else if (day > 30) {
                    181:             document.$formname.$dname\_day.value = 30;
                    182:         }
                    183:     }
                    184: </script>
                    185: ENDJS
1.26    ! matthew   186:     $result .= "  <nobr><select name=\"$dname\_month\" ".$special.' '.
1.10      matthew   187:         "onChange=\"javascript:$dname\_checkday()\" >\n";
                    188:     my @Months = qw/January February  March     April   May      June 
                    189:                     July    August    September October November December/;
                    190:     # Pad @Months with a bogus value to make indexing easier
                    191:     unshift(@Months,'If you can read this an error occurred');
                    192:     for(my $m = 1;$m <=$#Months;$m++) {
                    193:         $result .= "      <option value=\"$m\" ";
                    194:         $result .= "selected " if ($m-1 == $month);
                    195:         $result .= "> $Months[$m] </option>\n";
                    196:     }
                    197:     $result .= "  </select>\n";
                    198:     $result .= "  <input type=\"text\" name=\"$dname\_day\" ".
1.26    ! matthew   199:             "value=\"$mday\" size=\"3\" ".$special.' '.
1.10      matthew   200:             "onChange=\"javascript:$dname\_checkday()\" />\n";
                    201:     $result .= "  <input type=\"year\" name=\"$dname\_year\" ".
1.26    ! matthew   202:             "value=\"$year\" size=\"5\" ".$special.' '.
1.10      matthew   203:             "onChange=\"javascript:$dname\_checkday()\" />\n";
                    204:     $result .= "&nbsp;&nbsp;";
1.26    ! matthew   205:     $result .= "  <select name=\"$dname\_hour\" ".$special." >\n";
1.10      matthew   206:     for (my $h = 0;$h<24;$h++) {
                    207:         $result .= "      <option value=\"$h\" ";
                    208:         $result .= "selected " if ($hour == $h);
                    209:         $result .= "> ";
                    210:         if ($h == 0) {
                    211:             $result .= "12 am";
                    212:         } elsif($h == 12) {
                    213:             $result .= "12 noon";
                    214:         } elsif($h < 12) {
                    215:             $result .= "$h am";
                    216:         } else {
                    217:             $result .= $h-12 ." pm";
                    218:         }
                    219:         $result .= " </option>\n";
                    220:     } 
                    221:     $result .= "  </select>\n";
1.26    ! matthew   222:     $result .= "  <input type=\"text\" name=\"$dname\_minute\" ".$special.' '.
1.10      matthew   223:         "value=\"$min\" size=\"3\" /> m\n";
1.26    ! matthew   224:     $result .= "  <input type=\"text\" name=\"$dname\_second\" ".$special.' '.
1.10      matthew   225:         "value=\"$sec\" size=\"3\" /> s\n";
1.26    ! matthew   226:     $result .= "</nobr>\n<!-- end $dname date setting form -->\n";
1.10      matthew   227:     return $result;
                    228: }
                    229: 
                    230: ##############################################
                    231: ##############################################
                    232: 
1.22      matthew   233: =pod
                    234: 
1.10      matthew   235: =item &get_date_from_form
1.22      matthew   236: 
                    237: get_date_from_form retrieves the date specified in an &date_setter form.
1.10      matthew   238: 
                    239: Inputs:
                    240: 
                    241: =over 4
                    242: 
                    243: =item $dname
                    244: 
                    245: The name passed to &datesetter, which prefixes the form elements.
                    246: 
                    247: =item $defaulttime
                    248: 
                    249: The unix time to use as the default in case of poor inputs.
                    250: 
                    251: =back
                    252: 
                    253: Returns: Unix time represented in the form.
                    254: 
                    255: =cut
                    256: 
                    257: ##############################################
                    258: ##############################################
                    259: sub get_date_from_form {
                    260:     my ($dname) = @_;
                    261:     my ($sec,$min,$hour,$day,$month,$year);
                    262:     #
                    263:     if (defined($ENV{'form.'.$dname.'_second'})) {
                    264:         my $tmpsec = $ENV{'form.'.$dname.'_second'};
                    265:         if (($tmpsec =~ /^\d+$/) && ($tmpsec >= 0) && ($tmpsec < 60)) {
                    266:             $sec = $tmpsec;
                    267:         }
                    268:     }
                    269:     if (defined($ENV{'form.'.$dname.'_minute'})) {
                    270:         my $tmpmin = $ENV{'form.'.$dname.'_minute'};
                    271:         if (($tmpmin =~ /^\d+$/) && ($tmpmin >= 0) && ($tmpmin < 60)) {
                    272:             $min = $tmpmin;
                    273:         }
                    274:     }
                    275:     if (defined($ENV{'form.'.$dname.'_hour'})) {
                    276:         my $tmphour = $ENV{'form.'.$dname.'_hour'};
                    277:         if (($tmphour =~ /^\d+$/) && ($tmphour > 0) && ($tmphour < 32)) {
                    278:             $hour = $tmphour;
                    279:         }
                    280:     }
                    281:     if (defined($ENV{'form.'.$dname.'_day'})) {
                    282:         my $tmpday = $ENV{'form.'.$dname.'_day'};
                    283:         if (($tmpday =~ /^\d+$/) && ($tmpday > 0) && ($tmpday < 32)) {
                    284:             $day = $tmpday;
                    285:         }
                    286:     }
                    287:     if (defined($ENV{'form.'.$dname.'_month'})) {
                    288:         my $tmpmonth = $ENV{'form.'.$dname.'_month'};
                    289:         if (($tmpmonth =~ /^\d+$/) && ($tmpmonth > 0) && ($tmpmonth < 13)) {
                    290:             $month = $tmpmonth - 1;
                    291:         }
                    292:     }
                    293:     if (defined($ENV{'form.'.$dname.'_year'})) {
                    294:         my $tmpyear = $ENV{'form.'.$dname.'_year'};
                    295:         if (($tmpyear =~ /^\d+$/) && ($tmpyear > 1900)) {
                    296:             $year = $tmpyear - 1900;
                    297:         }
                    298:     }
1.24      www       299:     if (($year<70) || ($year>137)) { return undef; }
1.10      matthew   300:     if (eval(&timelocal($sec,$min,$hour,$day,$month,$year))) {
                    301:         return &timelocal($sec,$min,$hour,$day,$month,$year);
                    302:     } else {
                    303:         return undef;
                    304:     }
1.20      matthew   305: }
                    306: 
                    307: ##############################################
                    308: ##############################################
                    309: 
                    310: =pod
                    311: 
                    312: =item &pjump_javascript_definition()
                    313: 
                    314: Returns javascript defining the 'pjump' function, which opens up a
                    315: parameter setting wizard.
                    316: 
                    317: =cut
                    318: 
                    319: ##############################################
                    320: ##############################################
                    321: sub pjump_javascript_definition {
                    322:     my $Str = <<END;
                    323:     function pjump(type,dis,value,marker,ret,call) {
                    324:         parmwin=window.open("/adm/rat/parameter.html?type="+escape(type)
                    325:                  +"&value="+escape(value)+"&marker="+escape(marker)
                    326:                  +"&return="+escape(ret)
                    327:                  +"&call="+escape(call)+"&name="+escape(dis),"LONCAPAparms",
                    328:                  "height=350,width=350,scrollbars=no,menubar=no");
                    329:     }
                    330: END
                    331:     return $Str;
1.10      matthew   332: }
                    333: 
                    334: ##############################################
                    335: ##############################################
1.17      matthew   336: 
                    337: =pod
                    338: 
                    339: =item &javascript_nothing()
                    340: 
                    341: Return an appropriate null for the users browser.  This is used
                    342: as the first arguement for window.open calls when you want a blank
                    343: window that you can then write to.
                    344: 
                    345: =cut
                    346: 
                    347: ##############################################
                    348: ##############################################
                    349: sub javascript_nothing {
                    350:     # mozilla and other browsers work with "''", but IE on mac does not.
                    351:     my $nothing = "''";
                    352:     my $user_browser;
                    353:     my $user_os;
                    354:     $user_browser = $ENV{'browser.type'} if (exists($ENV{'browser.type'}));
                    355:     $user_os      = $ENV{'browser.os'}   if (exists($ENV{'browser.os'}));
                    356:     if (! defined($user_browser) || ! defined($user_os)) {
                    357:         (undef,$user_browser,undef,undef,undef,$user_os) = 
                    358:                            &Apache::loncommon::decode_user_agent();
                    359:     }
                    360:     if ($user_browser eq 'explorer' && $user_os =~ 'mac') {
                    361:         $nothing = "'javascript:void(0);'";
                    362:     }
                    363:     return $nothing;
                    364: }
                    365: 
1.21      matthew   366: 
1.17      matthew   367: ##############################################
                    368: ##############################################
                    369: 
1.21      matthew   370: =pod
1.17      matthew   371: 
1.21      matthew   372: =item &StatusOptions()
1.10      matthew   373: 
1.21      matthew   374: Returns html for a selection box which allows the user to choose the
                    375: enrollment status of students.  The selection box name is 'Status'.
1.6       stredwic  376: 
1.21      matthew   377: Inputs:
1.6       stredwic  378: 
1.21      matthew   379: $status: the currently selected status.  If undefined the value of
                    380: $ENV{'form.Status'} is taken.  If that is undefined, a value of 'Active'
                    381: is used.
1.6       stredwic  382: 
1.21      matthew   383: $formname: The name of the form.  If defined the onchange attribute of
                    384: the selection box is set to document.$formname.submit().
1.6       stredwic  385: 
1.21      matthew   386: $size: the size (number of lines) of the selection box.
1.6       stredwic  387: 
1.21      matthew   388: Returns: a perl string as described.
1.1       stredwic  389: 
1.21      matthew   390: =cut
1.9       stredwic  391: 
1.21      matthew   392: ##############################################
                    393: ##############################################
                    394: sub StatusOptions {
                    395:     my ($status, $formName,$size)=@_;
                    396:     $size = 1 if (!defined($size));
                    397:     if (! defined($status)) {
                    398:         $status = 'Active';
                    399:         $status = $ENV{'form.Status'} if (exists($ENV{'form.Status'}));
1.9       stredwic  400:     }
1.1       stredwic  401: 
                    402:     my $OpSel1 = '';
                    403:     my $OpSel2 = '';
                    404:     my $OpSel3 = '';
                    405: 
                    406:     if($status eq 'Any')         { $OpSel3 = ' selected'; }
                    407:     elsif($status eq 'Expired' ) { $OpSel2 = ' selected'; }
                    408:     else                         { $OpSel1 = ' selected'; }
                    409: 
                    410:     my $Str = '';
                    411:     $Str .= '<select name="Status"';
                    412:     if(defined($formName) && $formName ne '') {
                    413:         $Str .= ' onchange="document.'.$formName.'.submit()"';
                    414:     }
1.21      matthew   415:     $Str .= ' size="'.$size.'" ';
1.1       stredwic  416:     $Str .= '>'."\n";
1.21      matthew   417:     $Str .= '<option value="Active" '.$OpSel1.'>'.
                    418:         'Currently Enrolled</option>'."\n";
                    419:     $Str .= '<option value="Expired" '.$OpSel2.'>'.
                    420:         'Previously Enrolled</option>'."\n";
                    421:     $Str .= '<option value="Any" '.$OpSel3.'>'.
                    422:         'Any Enrollment Status</option>'."\n";
1.1       stredwic  423:     $Str .= '</select>'."\n";
                    424: }
                    425: 
1.12      matthew   426: 
                    427: ########################################################
                    428: ########################################################
                    429: 
                    430: =pod
                    431: 
                    432: =item &MultipleSectionSelect()
                    433: 
                    434: Inputs: 
                    435: 
                    436: =over 4
                    437: 
                    438: =item $sections A references to an array containing the names of all the
                    439: sections used in a class.
                    440: 
                    441: =item $selectedSections A reference to an array containing the names of the
                    442: currently selected sections.
                    443: 
                    444: =back 
                    445: 
                    446: Returns: a string containing HTML for a multiple select box for
                    447: selecting sections of a course.  
                    448: 
                    449: The form element name is 'Section'.  @$sections is sorted prior to output.
                    450: 
                    451: =cut
                    452: 
                    453: ########################################################
                    454: ########################################################
1.5       stredwic  455: sub MultipleSectionSelect {
                    456:     my ($sections,$selectedSections)=@_;
                    457: 
                    458:     my $Str = '';
1.7       stredwic  459:     $Str .= '<select name="Section" multiple="true" size="4">'."\n";
1.5       stredwic  460: 
1.11      minaeibi  461:     foreach (sort @$sections) {
1.5       stredwic  462:         $Str .= '<option';
                    463:         foreach my $selected (@$selectedSections) {
                    464:             if($_ eq $selected) {
                    465:                 $Str .= ' selected=""';
                    466:             }
                    467:         }
                    468:         $Str .= '>'.$_.'</option>'."\n";
                    469:     }
                    470:     $Str .= '</select>'."\n";
1.12      matthew   471:     
1.5       stredwic  472:     return $Str;
                    473: }
                    474: 
1.12      matthew   475: ########################################################
                    476: ########################################################
                    477: 
                    478: =pod
                    479: 
                    480: =item &Title()
                    481: 
                    482: Inputs: $pageName a string containing the name of the page to be sent
                    483: to &Apache::loncommon::bodytag.
                    484: 
                    485: Returns: string containing being <html> and complete <head> and <title>
                    486: as well as a <script> to focus the current window and change its width
                    487: and height to 500.  Why?  I do not know.  If you find out, please update
                    488: this documentation.
                    489: 
                    490: =cut
                    491: 
                    492: ########################################################
                    493: ########################################################
1.1       stredwic  494: sub Title {
                    495:     my ($pageName)=@_;
                    496: 
                    497:     my $Str = '';
                    498: 
                    499:     $Str .= '<html><head><title>'.$pageName.'</title></head>'."\n";
1.8       www       500:     $Str .= &Apache::loncommon::bodytag($pageName)."\n";
1.1       stredwic  501:     $Str .= '<script>window.focus(); window.width=500;window.height=500;';
                    502:     $Str .= '</script>'."\n";
                    503: 
                    504:     return $Str;
                    505: }
                    506: 
1.12      matthew   507: ########################################################
                    508: ########################################################
                    509: 
1.1       stredwic  510: =pod
                    511: 
1.13      matthew   512: =item &CreateHeadings()
1.1       stredwic  513: 
                    514: This function generates the column headings for the chart.
                    515: 
                    516: =over 4
                    517: 
1.4       stredwic  518: Inputs: $CacheData, $keyID, $headings, $spacePadding
1.1       stredwic  519: 
                    520: $CacheData: pointer to a hash tied to the cached data database
                    521: 
1.4       stredwic  522: $keyID: a pointer to an array containing the names of the data 
1.1       stredwic  523: held in a column and is used as part of a key into $CacheData
                    524: 
                    525: $headings: The names of the headings for the student information
                    526: 
                    527: $spacePadding: The spaces to go between columns
                    528: 
                    529: Output: $Str
                    530: 
                    531: $Str: A formatted string of the table column headings.
                    532: 
                    533: =back
                    534: 
                    535: =cut
                    536: 
1.12      matthew   537: ########################################################
                    538: ########################################################
1.4       stredwic  539: sub CreateHeadings {
                    540:     my ($data,$keyID,$headings,$displayString,$format)=@_;
1.1       stredwic  541:     my $Str='';
1.4       stredwic  542:     my $formatting = '';
1.1       stredwic  543: 
                    544:     for(my $index=0; $index<(scalar @$headings); $index++) {
1.4       stredwic  545:  	my $currentHeading=$headings->[$index];
                    546:         if($format eq 'preformatted') {
                    547:             my @dataLength=split(//,$currentHeading);
                    548:             my $length=scalar @dataLength;
                    549:             $formatting = (' 'x
                    550:                       ($data->{$keyID->[$index].':columnWidth'}-$length));
                    551:         }
                    552:         my $linkdata=$keyID->[$index];
                    553: 
1.1       stredwic  554:         my $tempString = $displayString;
                    555:         $tempString =~ s/LINKDATA/$linkdata/;
1.4       stredwic  556:         $tempString =~ s/DISPLAYDATA/$currentHeading/;
                    557:         $tempString =~ s/FORMATTING/$formatting/;
                    558: 
1.1       stredwic  559:         $Str .= $tempString;
                    560:     }
                    561: 
                    562:     return $Str;
                    563: }
                    564: 
1.12      matthew   565: ########################################################
                    566: ########################################################
                    567: 
1.1       stredwic  568: =pod
                    569: 
                    570: =item &FormatStudentInformation()
                    571: 
1.10      matthew   572: This function produces a formatted string of the student\'s information:
1.1       stredwic  573: username, domain, section, full name, and PID.
                    574: 
                    575: =over 4
                    576: 
1.4       stredwic  577: Input: $cache, $name, $keyID, $spacePadding
1.1       stredwic  578: 
                    579: $cache: This is a pointer to a hash that is tied to the cached data
                    580: 
                    581: $name:  The name and domain of the current student in name:domain format
                    582: 
1.4       stredwic  583: $keyID: A pointer to an array holding the names used to
1.1       stredwic  584: 
                    585: remove data from the hash.  They represent the name of the data to be removed.
                    586: 
                    587: $spacePadding: Extra spaces that represent the space between columns
                    588: 
                    589: Output: $Str
                    590: 
                    591: $Str: Formatted string.
                    592: 
                    593: =back
                    594: 
                    595: =cut
                    596: 
1.12      matthew   597: ########################################################
                    598: ########################################################
1.1       stredwic  599: sub FormatStudentInformation {
1.4       stredwic  600:     my ($data,$name,$keyID,$displayString,$format)=@_;
1.1       stredwic  601:     my $Str='';
1.4       stredwic  602:     my $currentColumn;
                    603: 
                    604:     for(my $index=0; $index<(scalar @$keyID); $index++) {
                    605:         $currentColumn=$data->{$name.':'.$keyID->[$index]};
1.1       stredwic  606: 
1.4       stredwic  607:         if($format eq 'preformatted') {
                    608:             my @dataLength=split(//,$currentColumn);
                    609:             my $length=scalar @dataLength;
                    610:             $currentColumn.= (' 'x
                    611:                      ($data->{$keyID->[$index].':columnWidth'}-$length));
1.1       stredwic  612:         }
                    613: 
1.4       stredwic  614:         my $tempString = $displayString;
                    615:         $tempString =~ s/DISPLAYDATA/$currentColumn/;
                    616: 
                    617:         $Str .= $tempString;
1.1       stredwic  618:     }
                    619: 
                    620:     return $Str;
1.7       stredwic  621: }
1.12      matthew   622: 
                    623: ########################################################
                    624: ########################################################
1.7       stredwic  625: 
1.23      matthew   626: =pod
                    627: 
                    628: =item Progess Window Handling Routines
                    629: 
                    630: These routines handle the creation, update, increment, and closure of 
                    631: progress windows.  The progress window reports to the user the number
                    632: of items completed and an estimate of the time required to complete the rest.
                    633: 
                    634: =over 4
                    635: 
                    636: 
                    637: =item &Create_PrgWin
                    638: 
                    639: Writes javascript to the client to open a progress window and returns a
                    640: data structure used for bookkeeping.
                    641: 
                    642: Inputs
                    643: 
                    644: =over 4
                    645: 
                    646: =item $r Apache request
                    647: 
                    648: =item $title The title of the progress window
                    649: 
                    650: =item $heading A description (usually 1 line) of the process being initiated.
                    651: 
                    652: =item $number_to_do The total number of items being processed.
                    653: 
                    654: =back
                    655: 
                    656: Returns a hash containing the progress state data structure.
                    657: 
                    658: 
                    659: =item &Update_PrgWin
                    660: 
                    661: Updates the text in the progress indicator.  Does not increment the count.
                    662: See &Increment_PrgWin.
                    663: 
                    664: Inputs:
                    665: 
                    666: =over 4
                    667: 
                    668: =item $r Apache request
                    669: 
                    670: =item $prog_state Pointer to the data structure returned by &Create_PrgWin
                    671: 
                    672: =item $displaystring The string to write to the status indicator
                    673: 
                    674: =back
                    675: 
                    676: Returns: none
                    677: 
                    678: 
                    679: =item Increment_PrgWin
                    680: 
                    681: Increment the count of items completed for the progress window by 1.  
                    682: 
                    683: Inputs:
                    684: 
                    685: =over 4
                    686: 
                    687: =item $r Apache request
                    688: 
                    689: =item $prog_state Pointer to the data structure returned by Create_PrgWin
                    690: 
                    691: =item $extraInfo A description of the items being iterated over.  Typically
                    692: 'student'.
                    693: 
                    694: =back
                    695: 
                    696: Returns: none
                    697: 
                    698: 
                    699: =item Close_PrgWin
                    700: 
                    701: Closes the progress window.
                    702: 
                    703: Inputs:
                    704: 
                    705: =over 4 
                    706: 
                    707: =item $r Apache request
                    708: 
                    709: =item $prog_state Pointer to the data structure returned by Create_PrgWin
                    710: 
                    711: =back
                    712: 
                    713: Returns: none
                    714: 
                    715: =back
                    716: 
                    717: =cut
                    718: 
                    719: ########################################################
                    720: ########################################################
                    721: 
1.7       stredwic  722: # Create progress
                    723: sub Create_PrgWin {
1.14      albertel  724:     my ($r, $title, $heading, $number_to_do)=@_;
1.7       stredwic  725:     $r->print('<script>'.
                    726:     "popwin=open(\'\',\'popwin\',\'width=400,height=100\');".
1.14      albertel  727:     "popwin.document.writeln(\'<html><head><title>$title</title></head>".
                    728: 	      "<body bgcolor=\"#88DDFF\">".
1.7       stredwic  729:               "<h4>$heading</h4>".
                    730:               "<form name=popremain>".
1.14      albertel  731:               "<input type=text size=55 name=remaining value=Starting></form>".
1.7       stredwic  732:               "</body></html>\');".
                    733:     "popwin.document.close();".
                    734:     "</script>");
                    735: 
1.14      albertel  736:     my %prog_state;
1.16      albertel  737:     $prog_state{'done'}=0;
1.23      matthew   738:     $prog_state{'firststart'}=&Time::HiRes::time();
                    739:     $prog_state{'laststart'}=&Time::HiRes::time();
1.16      albertel  740:     $prog_state{'max'}=$number_to_do;
1.14      albertel  741: 
1.7       stredwic  742:     $r->rflush();
1.14      albertel  743:     return %prog_state;
1.7       stredwic  744: }
                    745: 
                    746: # update progress
                    747: sub Update_PrgWin {
1.14      albertel  748:     my ($r,$prog_state,$displayString)=@_;
1.7       stredwic  749:     $r->print('<script>popwin.document.popremain.remaining.value="'.
                    750:               $displayString.'";</script>');
1.23      matthew   751:     $$prog_state{'laststart'}=&Time::HiRes::time();
1.14      albertel  752:     $r->rflush();
                    753: }
                    754: 
                    755: # increment progress state
                    756: sub Increment_PrgWin {
                    757:     my ($r,$prog_state,$extraInfo)=@_;
1.16      albertel  758:     $$prog_state{'done'}++;
1.23      matthew   759:     my $time_est= (&Time::HiRes::time() - $$prog_state{'firststart'})/
                    760:         $$prog_state{'done'} *
1.16      albertel  761: 	($$prog_state{'max'}-$$prog_state{'done'});
                    762:     $time_est = int($time_est);
                    763:     if (int ($time_est/60) > 0) {
                    764: 	my $min = int($time_est/60);
                    765: 	my $sec = $time_est % 60;
                    766: 	$time_est = $min.' minutes';
1.25      matthew   767:         if ($min < 10)  {
                    768:             if ($sec > 1) {
                    769:                 $time_est.= ', '.$sec.' seconds';
                    770:             } elsif ($sec > 0) {
                    771:                 $time_est.= ', '.$sec.' second';
                    772:             }
                    773:         }
1.16      albertel  774:     } else {
                    775: 	$time_est .= ' seconds';
                    776:     }
1.23      matthew   777:     my $lasttime = &Time::HiRes::time()-$$prog_state{'laststart'};
                    778:     if ($lasttime > 9) {
                    779:         $lasttime = int($lasttime);
                    780:     } elsif ($lasttime < 0.01) {
                    781:         $lasttime = 0;
                    782:     } else {
                    783:         $lasttime = sprintf("%3.2f",$lasttime);
                    784:     }
1.19      matthew   785:     if ($lasttime == 1) {
                    786:         $lasttime = '('.$lasttime.' second for '.$extraInfo.')';
                    787:     } else {
                    788:         $lasttime = '('.$lasttime.' seconds for '.$extraInfo.')';
                    789:     }
1.14      albertel  790:     $r->print('<script>popwin.document.popremain.remaining.value="'.
1.16      albertel  791: 	      $$prog_state{'done'}.'/'.$$prog_state{'max'}.
1.19      matthew   792: 	      ': '.$time_est.' remaining '.$lasttime.'";'.'</script>');
1.23      matthew   793:     $$prog_state{'laststart'}=&Time::HiRes::time();
1.7       stredwic  794:     $r->rflush();
                    795: }
                    796: 
                    797: # close Progress Line
                    798: sub Close_PrgWin {
1.14      albertel  799:     my ($r,$prog_state)=@_;
1.7       stredwic  800:     $r->print('<script>popwin.close()</script>'."\n");
1.14      albertel  801:     undef(%$prog_state);
1.7       stredwic  802:     $r->rflush(); 
1.1       stredwic  803: }
                    804: 
                    805: 1;
1.23      matthew   806: 
1.1       stredwic  807: __END__

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