--- loncom/homework/inputtags.pm	2015/10/05 02:35:40	1.337
+++ loncom/homework/inputtags.pm	2016/05/30 02:45:32	1.343
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # input  definitons
 #
-# $Id: inputtags.pm,v 1.337 2015/10/05 02:35:40 raeburn Exp $
+# $Id: inputtags.pm,v 1.343 2016/05/30 02:45:32 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -460,17 +460,23 @@ sub start_textline {
 		}
 		my $name = 'HWVAL_'.$id;
                 my $itemid = 'HWVAL_'.$partid.'_'.$id;
+                my $input_tag_id = $itemid.'_'.$input_id;
 		if ($Apache::inputtags::status[-1] eq 'CANNOT_ANSWER') {
 		    $name = "none";
 		}
 		$result.= '<input onkeydown="javascript:setSubmittedPart(\''.$partid.'\');"'
-		     . ' onfocus="javascript:disableAutoComplete(\''.$itemid.'\');"'
+		     . ' onfocus="javascript:disableAutoComplete(\''.$input_tag_id.'\');"'
 		     . ' type="text" '.$readonly.' name="'. $name . '"'
-		     . ' id="' . $itemid . '"'
+		     . ' id="' . $input_tag_id . '"'
 		     . ' value="'.  $oldresponse.'"'
 		     . ' class="LC_textline spellchecked"  size="'.$size.'"'.$maxlength.' />';
 
 		$result .= &spellcheck_onblur($itemid, $spellcheck);
+                if (($Apache::inputtags::status['-1'] eq 'CAN_ANSWER') &&
+                    (($tagstack->[-2] eq 'formularesponse') || ($tagstack->[-2] eq 'mathresponse')) &&
+                    (&Apache::lonnet::EXT('resource.'.$partid.'_'.$id.'.turnoffeditor') ne 'yes')) {
+                    $result.=&edit_mathresponse_button($input_tag_id);
+                }
 	    }
 	    if ($Apache::lonhomework::type eq 'exam'
 		&& &needs_exam_box($tagstack)) {
@@ -1053,7 +1059,7 @@ sub decideoutput {
 #
     
     my $computer = ($handgrade || $nocorrect)? ''
-	                       : " ".&mt("Computer's answer now shown above.");
+	                       : &mt("Computer's answer now shown above.");
     &Apache::lonxml::debug("handgrade has :$handgrade:");
 
     if ($previous) { $previousmsg=&mt('You have entered that answer before'); }
@@ -1077,7 +1083,9 @@ sub decideoutput {
 		$message = '\textbf{'.$message.'}';
 	    } else {
 		$message = "<b>".$message."</b>";
-		$message.= $computer;
+                if ($computer) {
+                    $message = "$computer $message";
+                }
 	    }
 	    $added_computer_text=1;
 	    if ($awarded > 0) {
@@ -1121,7 +1129,9 @@ sub decideoutput {
 		$message = '\textbf{'.&mt('You are correct.').'}';
 	    } else {
 		$message = "<b>".&mt('You are correct.')."</b>";
-		$message.= $computer;
+                if ($computer) {
+                    $message = "$computer $message";
+                }
 	    }
 	    $added_computer_text=1;
 	    if  ($awarded > 0 
@@ -1323,17 +1333,27 @@ sub decideoutput {
             my $first_access=&Apache::lonnet::get_first_access($interval[1]);
             if (defined($first_access)) {
                 my $due_date= &Apache::lonnet::EXT("resource.$part.duedate");
-                unless (($due_date) && ($due_date < $first_access + $interval[0])) { 
+                my ($timelimit) = ($interval[0] =~ /^(\d+)/);
+                unless (($due_date) && ($due_date < $first_access + $timelimit)) { 
                     $message = &mt("Answer Submitted: Your final submission will be graded when the time limit is reached.");
                 }
             }
         }
 	$css_class=$possible_class{'no_grade'};
 	$button=1;
+        if ($env{'course.'.$env{'request.course.id'}.'.type'} eq 'Placement') {
+            if ($Apache::inputtags::status[-1] eq 'CANNOT_ANSWER') {
+                $message = 'Answer Submitted';
+            } else {
+                undef($message); 
+            }
+        }
     }
     if ($Apache::inputtags::status[-1] eq 'SHOW_ANSWER' && 
 	!$added_computer_text && $target ne 'tex') {
-	$message.= $computer;
+        if ($computer) {
+            $message = "$computer $message";
+        }
 	$added_computer_text=1;
     }
     if ($Apache::lonhomework::type eq 'practice') {
@@ -1630,7 +1650,11 @@ sub get_grade_messages {
 	if ($target eq 'tex') {
 	    $message='\vskip 2 mm '.$message.' ';
 	} else {
-	    $message="<td class=\"$tdclass $css_class\">$message</td>";
+            if ($message) {
+	        $message="<td class=\"$tdclass $css_class\">$message</td>";
+            } else {
+                $message="<td class=\"$tdclass\"></td>";  
+            }
 	    if ($previousmsg) {
 		$previousmsg="<td class=\"$tdclass LC_answer_previous\">$previousmsg</td>";
 	    }
@@ -1667,7 +1691,13 @@ sub get_grade_messages {
 		    $trial.="/".$Apache::inputtags::params{'maxtries'};
 		}
 	    }
-	    $trystr = '<td class="'.$tdclass.'"><span class="LC_nobreak">'.&mt($tries_text.' [_1]',$trial).'</span></td>';
+            
+            unless (($env{'request.state'} ne "construct") && 
+                    ($env{'course.'.$env{'request.course.id'}.'.type'} eq 'Placement') && 
+                    (!$env{'request.role.adv'})) {
+                $trystr = '<span class="LC_nobreak">'.&mt($tries_text.' [_1]',$trial).'</span>';
+            }
+	    $trystr = '<td class="'.$tdclass.'">'.$trystr.'</td>';
 	}
     }
 
@@ -1743,7 +1773,9 @@ sub gradestatus {
 	} else {
 	    $output =
 		'<table><tr><td>'.$button.'</td>'.$output;
-	    if (!$no_previous) {
+	    if ((!$no_previous) &&
+                (($env{'course.'.$env{'request.course.id'}.'.type'} ne 'Placement') ||
+                 ($env{'request.role.adv'}))) {
 		$output.='<td class="'.$tdclass.'">'.&previous_tries($id,$target).'</td>';
 	    }
 	    $output.= '</tr></table>';
@@ -1914,6 +1946,118 @@ sub spelling_languages {
     return \@spelllangs;
 }
 
+sub edit_mathresponse_button {
+    my ($field) = @_;
+    my $eqneditor = 'lcmath';
+    if ($env{'browser.type'} eq 'safari') {
+        if ($env{'browser.os'} eq 'mac') {
+            my ($prefix,$version) = ($env{'browser.version'} =~ /^(\d*)(\d{3})\./);
+            if ($env{'browser.mobile'}) {
+                if (($version < 531) || (($prefix eq '') && ($version < 533))) {
+                    $eqneditor = '';
+                }
+            } elsif ($version < 533) {
+                $eqneditor = 'dragmath';
+            }
+        } elsif ($env{'browser.os'} eq 'win') {
+            if ($env{'browser.version'} < 533) {
+                $eqneditor = 'dragmath';
+            }
+        }
+    } elsif ($env{'browser.type'} eq 'explorer') {
+        if ($env{'browser.version'} < 9) {
+            $eqneditor = 'dragmath';
+        }
+    } elsif ($env{'browser.type'} eq 'mozilla') {
+        if ($env{'browser.version'} < 5) {
+            $eqneditor = 'dragmath';
+        } else {
+            if ($env{'browser.info'} =~ /^firefox\-([\d\.]+)/) {
+                my $firefox = $1;
+                if ($firefox < 4) {
+                    $eqneditor = 'dragmath';
+                }
+            }
+        }
+    } elsif ($env{'browser.type'} eq 'chrome') {
+        if ($env{'browser.version'} < 5) {
+            $eqneditor = 'dragmath';
+        }
+    } elsif ($env{'browser.type'} eq 'opera') {
+        if ($env{'browser.version'} < 12) {
+            $eqneditor = 'dragmath';
+        }
+    }
+    if ($eqneditor eq 'lcmath') {
+        if (($env{'request.course.id'}) && ($env{'request.state'} ne 'construct')) {
+            if (exists($env{'course.'.$env{'request.course.id'}.'.uselcmath'})) {
+                if ($env{'course.'.$env{'request.course.id'}.'.uselcmath'} eq '0') {
+                    $eqneditor = 'dragmath';
+                }
+            } else {
+                my %domdefs = &Apache::lonnet::get_domain_defaults($env{'course.'.$env{'request.course.id'}.'.domain'});
+                if ($domdefs{'uselcmath'} eq '0') {
+                    $eqneditor = 'dragmath';
+                }
+            }
+        } else {
+            my %domdefs = &Apache::lonnet::get_domain_defaults($env{'course.'.$env{'request.course.id'}.'.domain'});
+            if ($domdefs{'uselcmath'} eq '0') {
+                $eqneditor = 'dragmath';
+            }
+        }
+    }
+    if ($eqneditor eq 'dragmath') {
+        # DragMath applet
+        my $button=&mt('Edit Answer');
+#       my $helplink=&Apache::loncommon::help_open_topic('Formula_Editor');
+        my $iconpath=$Apache::lonnet::perlvar{'lonIconsURL'};
+        return(<<ENDFORMULABUTTON);
+<script type="text/javascript" language="JavaScript">
+function LC_mathedit_${field} (LCtextline) {
+    thenumber = LCtextline;
+    var thedata = '';
+    if (document.getElementById(LCtextline)) {
+        thedata = document.getElementById(LCtextline).value;
+    }
+    newwin = window.open("/adm/dragmath/MaximaPopup.html","","width=565,height=400,resizable");
+}
+</script>
+<a href="javascript:LC_mathedit_${field}('${field}');void(0);"><img class="stift" src="$iconpath/stift.gif" alt="$button" title="$button" /></a>
+ENDFORMULABUTTON
+    } elsif ($eqneditor eq 'lcmath') {
+        # LON-CAPA math equation editor
+        my $mathjaxjs;
+        unless (lc(&Apache::lontexconvert::tex_engine()) eq 'mathjax') {
+            $mathjaxjs = <<"MATHJAX_SCRIPT";
+var mathjaxscript = document.createElement("script");
+    mathjaxscript.type = "text/javascript";
+    mathjaxscript.src = "/adm/MathJax/MathJax.js?config=TeX-AMS-MML_HTMLorMML";
+    document.body.appendChild(mathjaxscript);
+MATHJAX_SCRIPT
+        }
+        return(<<EQ_EDITOR_SCRIPT);
+<script type="text/javascript">
+  var LCmathField = document.getElementById('${field}');
+  LCmathField.className += ' math'; // note the space
+  LCmathField.setAttribute('data-implicit_operators', 'true');
+  var LCMATH_started;
+  if (typeof LCMATH_started === 'undefined') {
+    $mathjaxjs
+    LCMATH_started = true;
+    var script = document.createElement("script");
+    script.type = "text/javascript";
+    script.src = "/adm/LC_math_editor/LC_math_editor.min.js";
+    document.body.appendChild(script);
+    window.addEventListener('load', function(e) {
+        LCMATH.initEditors();
+    }, false);
+  }
+</script>
+EQ_EDITOR_SCRIPT
+    }
+}
+
 1;
 __END__