--- loncom/xml/londefdef.pm	2024/09/04 18:31:28	1.456.2.6.2.5
+++ loncom/xml/londefdef.pm	2020/09/10 00:28:48	1.465
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Tags Default Definition Module 
 #
-# $Id: londefdef.pm,v 1.456.2.6.2.5 2024/09/04 18:31:28 raeburn Exp $
+# $Id: londefdef.pm,v 1.465 2020/09/10 00:28:48 raeburn Exp $
 # 
 #
 # Copyright Michigan State University Board of Trustees
@@ -50,7 +50,7 @@ use Apache::lonlocal;
 use Apache::loncommon();
 use Apache::Constants qw(:common);
 use File::Basename;
-use LONCAPA;
+use LONCAPA();
 # use Data::Dumper;
 
 BEGIN {
@@ -99,18 +99,6 @@ sub start_m {
             # it will fail with tth. This is worth a warning.
             # (even though some people might just use latex for printing)
             &Apache::lonxml::warning(&mt('Missing $ in [_1].','<m>'));
-        } elsif (($env{'browser.type'} eq 'safari') && ($env{'form.editxmltext'}) &&
-                 (($env{'form.problemmode'} eq 'view') || ($env{'form.problemmode'} eq 'discard'))) {
-            my $delimiter;
-            if ($inside =~ /\$$/) {
-                $delimiter = '$';
-            } elsif ($inside =~ /\\([)\]])$/) {
-                $delimiter = $1;
-            }
-            if ($delimiter) {
-                &Apache::lonxml::warning(&mt('Insert a space between [_1] and [_2].',
-                                             $delimiter,'</m>'));
-            }
         }
 	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
 	if ($eval eq 'on') {
@@ -367,7 +355,7 @@ sub start_title {
 	$Apache::londefdef::title = 
 	    &Apache::lonxml::get_all_text('/title',$parser,$style);
     } elsif ($target eq 'tex') {
-	$currentstring .= '\keephidden{Title of the document:  '; 
+	$currentstring .= '\keephidden{Title of the document:  ' 
     }
     if ($target eq 'meta') {
 	$currentstring='<title>';
@@ -612,9 +600,6 @@ sub start_body {
             if ($env{'request.use_absolute'}) {
                 $args->{'use_absolute'} = $env{'request.use_absolute'};
             }
-            if ($env{'form.only_body'}) {
-                $args->{'only_body'} = 1;
-            }
         }
 	$currentstring = 
 	    &Apache::loncommon::start_page($Apache::londefdef::title,
@@ -649,10 +634,9 @@ sub start_body {
 
 sub edit_controls {
     my ($nochgview) = @_;
-    my ($is_course_doc,$is_supp,$supp_path,$supp_title); 
-    my $result = '
+    my $result .= '
 <form method="post" action="">
-<div class="LC_edit_problem_header">'."\n";
+<div class="LC_edit_problem_header">';
     unless ($nochgview) {
         $result .= '
 <div class="LC_edit_problem_header_row1">'.
@@ -661,20 +645,12 @@ sub edit_controls {
 </div>';
     }
     $result .= '
-<div>
-<input type="hidden" name="editmode" value="" />
-<input type="button" name="editordefault" accesskey="e" value="'.&mt('Edit').
-'" onclick="seteditmode(this.form,'."'edit'".');" />'."\n";
+<div><input type="submit" name="editmode" accesskey="e" value="'.&mt('Edit').'" />';
     if ($env{'browser.type'} ne 'explorer' || $env{'browser.version'} > 9) {
         my $uri = $env{'request.uri'};
-        if ($uri =~ /\.(xml|html|htm|xhtml|xhtm)$/) {
-            my %editors = &Apache::loncommon::permitted_editors($uri);
-            if ($editors{'daxe'}) {
-                my $daxeurl = '/daxepage'.$uri;
-                $result .= '<input type="button" name="editordaxe" value="'.&mt('Edit with Daxe').
-                           '" onclick="seteditmode(this.form,'."'daxe'".');" />'."\n";
-            }
-        }
+        my $daxeurl = '/daxepage'.$uri;
+        $result .= '<input type="button" value="'.&mt('Edit with Daxe').'" '.
+                  'onclick="window.open(\''.$daxeurl.'\',\'_blank\');" />';
     }
     if (($env{'request.course.id'}) && ($env{'form.forceedit'})) {
         my $url=&Apache::lonnet::hreflocation('',$env{'request.filename'});
@@ -683,19 +659,11 @@ sub edit_controls {
             if ($env{'request.course.id'}) {
                 $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
                 $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
-                if ($url =~ m{^\Q/uploaded/$cdom/$cnum/\E(supplemental|docs)/}) {
-                    if ($1 eq 'supplemental') {
-                        $is_supp = 1;
-                    }
-                    $is_course_doc = 1;
-                }
                 if ($env{'request.filename'} =~ m{/userfiles/supplemental/default|\d+/}) {
-                    my $fn=&Apache::lonnet::declutter($env{'request.filename'});
-                    if (&Apache::lonnet::is_course_upload($fn,$cnum,$cdom)) {
+                    if (&Apache::lonnet::is_course_upload($env{'request.filename'},
+                                                          $cnum,$cdom)) {
                         &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                                                                 ['folderpath','title']);
-                        $supp_path = &escape(&HTML::Entities::decode($Apache::lonnet::env{'form.folderpath'}));
-                        $supp_title = &escape(&HTML::Entities::decode($Apache::lonnet::env{'form.title'}));
                     }
                 }
             }
@@ -723,9 +691,7 @@ sub edit_controls {
 </div>
 </form>
 ';
-    my $setedit_js = &Apache::lonxml::seteditor_javascript($is_course_doc,$is_supp,
-                                                           $supp_path,$supp_title);
-    return $setedit_js."\n".$result;
+    return $result;
 }
 
 sub end_body {
@@ -1339,6 +1305,10 @@ sub start_p {
 
 	$currentstring .= &end_p();	# close off prior para if in progress.
 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
+	if (!defined $align) {
+          # check inline CSS
+          $align = &get_css_property('text-align',$parstack,$safeeval);
+        }
 	if ($align eq 'center') {
 	    $currentstring .='\begin{center}\par ';
 	    $closing_string = '\end{center}';
@@ -1346,13 +1316,13 @@ sub start_p {
 		$currentstring = &center_correction().$currentstring;
 	    }
 	} elsif ($align eq 'right') {
-	    $currentstring.="\n".'{\flushright ';
+	    $currentstring.="\n".'\begin{flushright}';
 #	    $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
-	    $closing_string= "}\n";
+	    $closing_string= '\end{flushright}'."\n";
 	} elsif ($align eq 'left') {
-	    $currentstring.= "\n".'{\flushleft ';
+	    $currentstring.= "\n".'\begin{flushleft}';
 #	    $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
-	    $closing_string = "}\n";
+	    $closing_string = '\end{flushleft}'."\n";
 	} else {
             $currentstring.='\par ';
 	    if (&is_inside_of($tagstack, 'table')) {
@@ -2906,8 +2876,8 @@ sub start_img {
         my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
 	$currentstring .=&Apache::edit::tag_start($target,$token);
 	$currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
-	    &Apache::edit::browse('src',undef,'alt',$only).' '.
-	    &Apache::edit::search('src',undef,'alt').'<br />';
+                         &Apache::edit::browse_or_search('src',undef,'alt',$only,undef,1).
+                         '<br />';
 	$currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
 	$currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
 	$currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
@@ -2929,17 +2899,19 @@ sub start_img {
 	my $src=    &Apache::lonxml::get_param('src',$parstack,$safeeval);
 	my $width=  &Apache::lonxml::get_param('width',$parstack,$safeeval);
 	my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
-
+        my $element = &Apache::edit::get_element('src'); 
+        my $text;
         if ($token->[2]{'src'}=~/\$/) {
-           $currentstring.=&mt('Variable image source');
+           $text = &mt('Variable image source');
         } elsif ($token->[2]{'src'}=~/\S/) {
 	   $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
 	   if ($width) { $currentstring.=' width="'.$width.'" '; }
 	   if ($height) { $currentstring.=' height="'.$height.'" '; }
-	   $currentstring .= ' />';
+	   $currentstring .= ' id="previewimg_'.$element.'" />';
         } else {
-           $currentstring.=&mt("No image source specified");
+           $text = &mt("No image source specified");
         }
+        $currentstring .= ' <span id="showimg_'.$element.'">'.$text.'</span>';
     } elsif ($target eq 'modified') {
 	my ($osrc,$owidth,$oheight)=
 	    ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
@@ -3295,12 +3267,12 @@ sub end_externallink {
     return $currentstring;
 }
 
-#-- <blankspace height="">
+#-- <blankspace heigth="">
 sub start_blankspace {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = &end_p();	# closes off any unclosed <p>
     if ($target eq 'tex') {
-	my $howmuch = &Apache::lonxml::get_param('height',$parstack,$safeeval,undef,1);
+	my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
 	$currentstring .= '\vskip '.$howmuch.' ';
     }
     return $currentstring;
@@ -4085,13 +4057,33 @@ sub end_spacer {
     return $currentstring;
 }
 
+my @span_end_stack; # for span tex target
+
 #-- <span> tag (end tag required)
 sub start_span {
-    my ($target,$token) = @_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';
     if ($target eq 'web' || $target eq 'webgrade') {
 	$currentstring = $token->[4];     
-    } 
+    } elsif ($target eq 'tex') {
+        my $endstring = '';
+        my $family = &get_css_property('font-family',$parstack,$safeeval);
+        if ($family eq 'monospace') {
+            $currentstring .= '\texttt{';
+            $endstring .= '}';
+        }
+        my $weight = &get_css_property('font-weight',$parstack,$safeeval);
+        if ($weight eq 'bold') {
+            $currentstring .= '\textbf{';
+            $endstring .= '}';
+        }
+        my $style = &get_css_property('font-style',$parstack,$safeeval);
+        if ($style eq 'italic') {
+            $currentstring .= '\textit{';
+            $endstring .= '}';
+        }
+        push(@span_end_stack, $endstring);
+    }
     return $currentstring;
 }
 
@@ -4100,7 +4092,10 @@ sub end_span {
     my $currentstring = '';
     if ($target eq 'web' || $target eq 'webgrade') {
 	$currentstring = $token->[2];    
-    } 
+    } elsif ($target eq 'tex') {
+        my $endstring = pop @span_end_stack;
+        $currentstring .= $endstring;
+    }
     return $currentstring;
 }
 
@@ -4306,10 +4301,10 @@ sub resize_image {
 	    $height_param=$TeXwidth/$old_width_param*$height_param;
 	}
     } elsif ($TeXheight) {
+	$height_param = $TeXheight;
 	if ($height_param) {
 	    $width_param  = $TeXheight/$height_param*$width_param;
 	}
-	$height_param = $TeXheight;
     } elsif ($width) {
 	my $old_width_param=$width_param;
 	$width_param = $width*$scaling;
@@ -4698,6 +4693,23 @@ sub clean_docs_httpref {
     return $cleanhref;
 }
 
+# This is retrieving a CSS property from the style attribute of the current element.
+# It is not checking <style> elements or linked stylesheets yet.
+sub get_css_property {
+    my ($property,$parstack,$safeeval) = @_;
+    my $style=&Apache::lonxml::get_param('style',$parstack,$safeeval,undef,1);
+    my @style_components=split(/;/,$style);
+    foreach my $css_pair (@style_components) {
+        my ($name, $value) = split(/:/, $css_pair);
+        $name =~ s/^\s+|\s+$//g;
+        $value =~ s/^\s+|\s+$//g;
+        if ($name eq $property) {
+            return $value;
+        }
+    }
+    return undef;
+}
+
 =pod
 
 =head1 NAME