--- loncom/xml/lonplot.pm	2001/12/31 17:30:09	1.27
+++ loncom/xml/lonplot.pm	2002/01/04 14:30:08	1.32
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Dynamic plot
 #
-# $Id: lonplot.pm,v 1.27 2001/12/31 17:30:09 matthew Exp $
+# $Id: lonplot.pm,v 1.32 2002/01/04 14:30:08 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -26,7 +26,9 @@
 # http://www.lon-capa.org/
 #
 # 12/15/01 Matthew
-# 12/17 12/18 12/19 12/20 12/21 12/27 12/28 12/30 Matthew
+# 12/17 12/18 12/19 12/20 12/21 12/27 12/28 12/30 12/31 Matthew
+# 01/01/02 Matthew
+# 01/02 01/03 Matthew
 package Apache::lonplot;
 
 use strict;
@@ -69,6 +71,31 @@ sub BEGIN {
 ##        Tests used in checking the validitity of input         ##
 ##                                                               ##
 ###################################################################
+
+my $max_str_len = 50;    # if a label, title, xlabel, or ylabel text
+                         # is longer than this, it will be truncated.
+
+my %linestyles = 
+    (
+     lines          => 2,     # Maybe this will be used in the future
+     linespoints    => 2,     # to check on whether or not they have 
+     dots	    => 2,     # supplied enough <data></data> fields
+     points         => 2,     # to use the given line style.  But for
+     steps	    => 2,     # now there are more important things 
+     fsteps	    => 2,     # for me to deal with.
+     histeps        => 2,
+     errorbars	    => 2,
+     xerrorbars	    => 2,
+     yerrorbars	    => 2,
+     xyerrorbars    => 2,
+     boxes          => 2,
+     boxerrorbars   => 2,
+     boxxyerrorbars => 2,
+     financebars    => 2,
+     candlesticks   => 2,
+     vector	    => 2
+    );		    
+
 my $int_test       = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
 my $real_test      = 
     sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
@@ -76,7 +103,7 @@ my $color_test     = sub {$_[0]=~s/\s+//
 my $onoff_test     = sub {$_[0]=~/^(on|off)$/};
 my $key_pos_test   = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
 my $sml_test       = sub {$_[0]=~/^(small|medium|large)$/};
-my $linestyle_test = sub {$_[0]=~/^(lines|linespoints|dots|points|steps)$/};
+my $linestyle_test = sub {exists($linestyles{$_[0]})};
 my $words_test     = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w\(\)]+ ?)+$/};
 
 ###################################################################
@@ -89,13 +116,13 @@ my %plot_defaults =
      height       => {
 	 default     => 200,
 	 test        => $int_test,
-	 description => 'vertical size of image (pixels)',
+	 description => 'height of image (pixels)',
 	 edit_type   => 'entry' 
 	 },
      width        => {
 	 default     => 200,
 	 test        => $int_test,
-	 description => 'horizontal size of image (pixels)',
+	 description => 'width of image (pixels)',
 	 edit_type   => 'entry'
 	 },
      bgcolor      => {
@@ -193,7 +220,7 @@ my %label_defaults =
 
 my %axis_defaults = 
     (
-     color     => {
+     color   => {
 	 default => 'x000000', 
 	 test => $color_test,
 	 description => 'color of axes (x000000)',
@@ -222,13 +249,6 @@ my %axis_defaults =
 	 test => $real_test,
 	 description => 'maximum y-value shown in plot',	 
 	 edit_type   => 'entry'
-	 },
-     linestyle => {
-	 default => 'points',
-	 test => $linestyle_test,
-	 description => 'Style of the axis lines',
-	 edit_type   => 'choice',
-	 choices     => ['lines','linespoints','dots','points']
 	 }
      );
 
@@ -251,7 +271,11 @@ my %curve_defaults =
 	 test => $linestyle_test,
 	 description => 'Style of the axis lines',
 	 edit_type   => 'choice',
-	 choices     => ['lines','linespoints','dots','points','steps']
+	 choices     => ['lines','linespoints','dots','points','steps',
+			 'fsteps','histeps','errorbars','xerrorbars',
+			 'yerrorbars','xyerrorbars','boxes','boxerrorbars',
+			 'boxxyerrorbars','financebars','candlesticks',
+			 'vector']
 	 }
      );
 
@@ -271,13 +295,11 @@ sub start_plot {
     my $result='';
     &Apache::lonxml::register('Apache::lonplot',
 	     ('title','xlabel','ylabel','key','axis','label','curve'));
-    push (@Apache::lonxml::namespace,'plot');
-    my $inside = &Apache::lonxml::get_all_text("/plot",$$parser[-1]);
+    push (@Apache::lonxml::namespace,'lonplot');
     if ($target eq 'web') {
+	my $inside = &Apache::lonxml::get_all_text("/plot",$$parser[-1]);
 	$inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
-    }
-    &Apache::lonxml::newparser($parser,\$inside);
-    if ($target eq 'web') {
+	&Apache::lonxml::newparser($parser,\$inside);
 	&get_attributes(\%plot,\%plot_defaults,$parstack,$safeeval,
 			$tagstack->[-1]);
     } elsif ($target eq 'edit') {
@@ -307,7 +329,7 @@ sub end_plot {
 	## Determine filename
 	my $tmpdir = '/home/httpd/perl/tmp/';
 	my $filename = $ENV{'user.name'}.'_'.$ENV{'user.domain'}.
-	    '_'.time.'_'.$$.'_plot.data';
+	    '_'.time.'_'.$$.int(rand(1000)).'_plot.data';
 	## Write the plot description to the file
 	my $fh=Apache::File->new(">$tmpdir$filename");
 	print $fh &write_gnuplot_file();
@@ -363,13 +385,16 @@ sub start_title {
     my $result='';
     if ($target eq 'web') {
 	$title = &Apache::lonxml::get_all_text("/title",$$parser[-1]);
+	if (length($title) > $max_str_len) {
+	    $title = substr($title,0,$max_str_len);
+	}
     } elsif ($target eq 'edit') {
 	$result.=&Apache::edit::tag_start($target,$token,'Plot Title');
 	my $text=&Apache::lonxml::get_all_text("/title",$$parser[-1]);
 	$result.='</td></tr><tr><td colspan="3">'.
-	    &Apache::edit::editfield('',$text,'',20,1);
+	    &Apache::edit::editfield('',$text,'',60,1);
     } elsif ($target eq 'modified') {
-	my $text=$$parser[-1]->get_text("/function");
+	my $text=$$parser[-1]->get_text("/title");
 	$result.=&Apache::edit::modifiedfield($token);
     }
     return $result;
@@ -390,13 +415,16 @@ sub start_xlabel {
     my $result='';
     if ($target eq 'web') {
 	$xlabel = &Apache::lonxml::get_all_text("/xlabel",$$parser[-1]);
+	if (length($xlabel) > $max_str_len) {
+	    $xlabel = substr($xlabel,0,$max_str_len);
+	}
     } elsif ($target eq 'edit') {
 	$result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
 	my $text=&Apache::lonxml::get_all_text("/xlabel",$$parser[-1]);
 	$result.='</td></tr><tr><td colspan="3">'.
-	    &Apache::edit::editfield('',$text,'',20,1);
+	    &Apache::edit::editfield('',$text,'',60,1);
     } elsif ($target eq 'modified') {
-	my $text=$$parser[-1]->get_text("/function");
+	my $text=$$parser[-1]->get_text("/xlabel");
 	$result.=&Apache::edit::modifiedfield($token);
     }
     return $result;
@@ -418,13 +446,16 @@ sub start_ylabel {
     my $result='';
     if ($target eq 'web') {
 	$ylabel = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]);
+	if (length($ylabel) > $max_str_len) {
+	    $ylabel = substr($ylabel,0,$max_str_len);
+	}
     } elsif ($target eq 'edit') {
 	$result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
 	my $text = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]);
 	$result .= '</td></tr><tr><td colspan="3">'.
-	    &Apache::edit::editfield('',$text,'',20,1);
+	    &Apache::edit::editfield('',$text,'',60,1);
     } elsif ($target eq 'modified') {
-	my $text=$$parser[-1]->get_text("/function");
+	my $text=$$parser[-1]->get_text("/ylabel");
 	$result.=&Apache::edit::modifiedfield($token);
     }
     return $result;
@@ -448,18 +479,16 @@ sub start_label {
 	my %label;
 	&get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
 		    $tagstack->[-1]);
-	$label{'text'} = &Apache::lonxml::get_all_text("/label",$$parser[-1]);
-	if (! &$words_test($label{'text'})) {
-	    # I should probably warn about it, too.
-	    $label{'text'} = 'Illegal text';
-	}
+	my $text = &Apache::lonxml::get_all_text("/label",$$parser[-1]);
+	$text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
+	$label{'text'} = $text;
 	push(@labels,\%label);
     } elsif ($target eq 'edit') {
 	$result .= &Apache::edit::tag_start($target,$token,'Plot Label');
 	$result .= &edit_attributes($target,$token,\%label_defaults);
 	my $text = &Apache::lonxml::get_all_text("/label",$$parser[-1]);
 	$result .= '</td></tr><tr><td colspan="3">'.
-	    &Apache::edit::editfield('',$text,'',20,1);
+	    &Apache::edit::editfield('',$text,'',60,1);
     } elsif ($target eq 'modified') {
 	my $constructtag=&Apache::edit::get_new_args
 	    ($token,$parstack,$safeeval,keys(%label_defaults));
@@ -535,7 +564,7 @@ sub start_function {
 	$result .= &Apache::edit::tag_start($target,$token,'Curve Function');
 	my $text = &Apache::lonxml::get_all_text("/function",$$parser[-1]);
 	$result .= '</td></tr><tr><td colspan="3">'.
-	    &Apache::edit::editfield('',$text,'',20,1);
+	    &Apache::edit::editfield('',$text,'',60,1);
     } elsif ($target eq 'modified') {
 	# Why do I do this?
 	my $text=$$parser[-1]->get_text("/function");
@@ -597,7 +626,7 @@ sub start_data {
 	$result .= &Apache::edit::tag_start($target,$token,'Curve Data');
 	my $text = &Apache::lonxml::get_all_text("/data",$$parser[-1]);
 	$result .= '</td></tr><tr><td colspan="3">'.
-	    &Apache::edit::editfield('',$text,'',20,1);
+	    &Apache::edit::editfield('',$text,'',60,1);
     } elsif ($target eq 'modified') {
 	my $text=$$parser[-1]->get_text("/data");
 	$result.=&Apache::edit::modifiedfield($token);
@@ -626,6 +655,12 @@ sub start_axis {
 	$result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
 	$result .= &edit_attributes($target,$token,\%axis_defaults);
     } elsif ($target eq 'modified') {
+	my $constructtag=&Apache::edit::get_new_args
+	    ($token,$parstack,$safeeval,keys(%axis_defaults));
+	if ($constructtag) {
+	    $result = &Apache::edit::rebuild_tag($token);
+	    $result.= &Apache::edit::handle_insert();
+	}
     }
     return $result;
 }
@@ -637,12 +672,6 @@ sub end_axis {
     } elsif ($target eq 'edit') {
 	$result.=&Apache::edit::tag_end($target,$token);
     } elsif ($target eq 'modified') {
-	my $constructtag=&Apache::edit::get_new_args
-	    ($token,$parstack,$safeeval,keys(%axis_defaults));
-	if ($constructtag) {
-	    $result = &Apache::edit::rebuild_tag($token);
-	    $result.= &Apache::edit::handle_insert();
-	}
     }
     return $result;
 }
@@ -818,24 +847,20 @@ sub edit_attributes {
 
 #------------------------------------------------ insert_xxxxxxx
 sub insert_plot {
-    my $result;
+    my $result = '';
     #  plot attributes
-    $result .= '<plot ';
-    foreach my $attr (%plot_defaults) {
-	$result .= '     '.$attr.'="'.$plot_defaults{$attr}->{'default'}.
-	    "\"\n";
+    $result .= "<plot \n";
+    foreach my $attr (keys(%plot_defaults)) {
+	$result .= "     $attr=\"$plot_defaults{$attr}->{'default'}\"\n";
     }
     $result .= ">\n";
     # Add the components
     $result .= &insert_key();
     $result .= &insert_axis();
-    $result .= &insert_label();    
-    $result .= &insert_curve();
-    $result .= &insert_function();    
-    $result .= "</curve>\n";
+    $result .= &insert_title();    
+    $result .= &insert_xlabel();    
+    $result .= &insert_ylabel();    
     $result .= &insert_curve();
-    $result .= &insert_data();    
-    $result .= "</curve>\n";
     # close up the <plot>
     $result .= "</plot>\n";
     return $result;
@@ -843,10 +868,9 @@ sub insert_plot {
 
 sub insert_key {
     my $result;
-    $result .= '    <key ';
-    foreach my $attr (%key_defaults) {
-	$result .= '         '.$attr.'="'.$key_defaults{$attr}->{'default'}.
-	    "\"\n";
+    $result .= "    <key \n";
+    foreach my $attr (keys(%key_defaults)) {
+	$result .= "         $attr=\"$key_defaults{$attr}->{'default'}\"\n";
     }
     $result .= "   />\n";
     return $result;
@@ -855,18 +879,21 @@ sub insert_key {
 sub insert_axis{
     my $result;
     $result .= '    <axis ';
-    foreach my $attr (%axis_defaults) {
-	$result .= '         '.$attr.'="'.$axis_defaults{$attr}->{'default'}.
-	    "\"\n";
+   foreach my $attr (keys(%axis_defaults)) {
+	$result .= "         $attr=\"$axis_defaults{$attr}->{'default'}\"\n";
     }
     $result .= "   />\n";
     return $result;
 }
 
+sub insert_title { return "    <title></title>\n"; }
+sub insert_xlabel { return "    <xlabel></xlabel>\n"; }
+sub insert_ylabel { return "    <ylabel></ylabel>\n"; }
+
 sub insert_label {
     my $result;
     $result .= '    <label ';
-    foreach my $attr (%label_defaults) {
+    foreach my $attr (keys(%label_defaults)) {
 	$result .= '         '.$attr.'="'.
 	    $label_defaults{$attr}->{'default'}."\"\n";
     }
@@ -877,11 +904,11 @@ sub insert_label {
 sub insert_curve {
     my $result;
     $result .= '    <curve ';
-    foreach my $attr (%curve_defaults) {
+    foreach my $attr (keys(%curve_defaults)) {
 	$result .= '         '.$attr.'="'.
 	    $curve_defaults{$attr}->{'default'}."\"\n";
     }
-    $result .= "    >\n";
+    $result .= "    ></curve>\n";
 }
 
 sub insert_function {
@@ -893,7 +920,6 @@ sub insert_function {
 sub insert_data {
     my $result;
     $result .= "     <data></data>\n";
-    $result .= "     <data></data>\n";
     return $result;
 }