--- loncom/xml/lonplot.pm 2001/12/17 21:43:12 1.1
+++ loncom/xml/lonplot.pm 2001/12/20 22:36:35 1.12
@@ -1,7 +1,7 @@
# The LearningOnline Network with CAPA
# Dynamic plot
#
-# $Id: lonplot.pm,v 1.1 2001/12/17 21:43:12 matthew Exp $
+# $Id: lonplot.pm,v 1.12 2001/12/20 22:36:35 matthew Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -25,73 +25,100 @@
#
# http://www.lon-capa.org/
#
-# 2/21 Guy
+# 12/15/01 Matthew
+# 12/18 12/19 12/20 Matthew
package Apache::lonplot;
+
use strict;
+use Apache::File;
use Apache::response;
+use Apache::lonxml;
+
+use Digest::MD5 qw(md5_base64);
sub BEGIN {
&Apache::lonxml::register('Apache::lonplot',('plot'));
}
-
+##
+## Description of data structures:
+##
+## %plot %key %axis
+## --------------------------
+## height title color
+## width box xmin
+## bgcolor pos xmax
+## fgcolor ymin
+## transparent ymax
+## grid
+## border
+## font
+##
+## @labels: $labels[$i] = \%label
+## %label: text, xpos, ypos, justify
+##
+## @curves: $curves[$i] = \%curve
+## %curve: name, linestyle, ( function | data )
+##
+## $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
+## [y1,y2,y3,y4] ]
+##
+##------------------------------------------------------------
##
## Tests used in checking the validitity of input
##
-my $int_test = sub {$_[0]=~/^\d+$/};
-my $real_test = sub {$_[0]=~/^[+-]?\d*\.?\d*$/};
-my $color_test = sub {$_[0]=~/^x[\da-f]{6}$/};
+my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
+my $real_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*$/};
+my $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-f]{6}$/};
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 $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^(\w+ ?)+$/};
##
## Default values for attributes of elements
##
my %plot_defaults =
(
- height => {default => 200, test => $int_test },
- width => {default => 200, test => $int_test },
- bgcolor => {default => "xffffff", test => $color_test},
- fgcolor => {default => "x000000", test => $color_test},
- transparent => {default => "off", test => $onoff_test},
- grid => {default => "off", test => $onoff_test},
- border => {default => "on" , test => $onoff_test},
- font => {default => "medium", test => $sml_test }
+ height => {default => 200, test => $int_test },
+ width => {default => 200, test => $int_test },
+ bgcolor => {default => 'xffffff', test => $color_test },
+ fgcolor => {default => 'x000000', test => $color_test },
+ transparent => {default => 'off', test => $onoff_test },
+ grid => {default => 'off', test => $onoff_test },
+ border => {default => 'on', test => $onoff_test },
+ font => {default => 'medium', test => $sml_test }
);
my %key_defaults =
(
- title => { default => "on" , test => $onoff_test },
- box => { default => "off" , test => $onoff_test },
- pos => { default => "top right" , test => $key_pos_test}
+ title => { default => '', test => $words_test },
+ box => { default => 'off', test => $onoff_test },
+ pos => { default => 'top right', test => $key_pos_test }
);
my %label_defaults =
(
- xpos => {default => 0, test => $real_test },
- ypos => {default => 0, test => $real_test },
- color => {default => "x000000", test => $color_test },
- justify => {default => "left",
- test => sub {$_[0]=~/^(left|right|center)$/}}
+ xpos => {default => 0, test => $real_test },
+ ypos => {default => 0, test => $real_test },
+ justify => {default => 'left',
+ test => sub {$_[0]=~/^(left|right|center)$/} }
);
my %axis_defaults =
(
- color => {default => "x000000", test => $color_test},
- thickness => {default => 1, test => $int_test },
- xmin => {default => -10.0, test => $real_test },
- xmax => {default => 10.0, test => $real_test },
- ymin => {default => -10.0, test => $real_test },
- ymax => {default => 10.0, test => $real_test }
+ color => {default => 'x000000', test => $color_test},
+ xmin => {default => '-10.0', test => $real_test },
+ xmax => {default => ' 10.0', test => $real_test },
+ ymin => {default => '-10.0', test => $real_test },
+ ymax => {default => ' 10.0', test => $real_test }
);
my %curve_defaults =
(
- color => {default => "x000000", test => $color_test },
- name => {default => "x000000", test => sub {$_[0]=~/^[\w ]*$/} },
- linestyle => {default => "lines", test => $linestyle_test }
+ color => {default => 'x000000', test => $color_test },
+ name => {default => 'x000000', test => sub {1} },#sub {$_[0]=~/^[\w ]*$/} },
+ linestyle => {default => 'lines', test => $linestyle_test }
);
##
@@ -100,56 +127,72 @@ my %curve_defaults =
my (%plot,%key,%axis,$title,$xlabel,$ylabel,@labels,@curves);
sub start_plot {
- %plot = ''; %key=''; %axis='';
- $title=''; $xlabel=''; $ylabel='';
- @labels = ''; @curves='';
+ %plot = undef; %key = undef; %axis = undef;
+ $title = undef; $xlabel = undef; $ylabel = undef;
+ $#labels = -1; $#curves = -1;
+ #
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
- #
- &Apache::lonxml::register('Apache::plot',
+ &Apache::lonxml::register('Apache::lonplot',
('title','xlabel','ylabel','key','axis','label','curve'));
push (@Apache::lonxml::namespace,'plot');
- &get_attributes(\%plot,\%plot_defaults,$parstack,$safeeval);
- return '';
-}
-
-sub get_attributes{
- %values = %{$_[0]};
- %defaults = %{$_[1]};
- $parstack = $_[2];
- $safeeval = $_[3];
- my $attr;
- foreach $attr (keys %defaults) {
- $values{$attr} = &Apache::lonxml::get_param($attr,$parstack,$safeeval);
- my $test = $defaults{$attr}->{'test'};
- $values{$attr} = (&$test($values{$attr}) ?
- $values{$attr} :
- $defaults{$attr} );
+ ## Always evaluate the insides of the <plot></plot> tags
+ my $inside = &Apache::lonxml::get_all_text("/plot",$$parser[-1]);
+ $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
+ &Apache::lonxml::newparser($parser,\$inside);
+ ##-------------------------------------------------------
+ &get_attributes(\%plot,\%plot_defaults,$parstack,$safeeval,
+ $tagstack->[-1]);
+ if ($target eq 'web') {
}
- return ;
+ return '';
}
sub end_plot {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
pop @Apache::lonxml::namespace;
- my $result;
- ## Determine filename
- my $filename =
- ## Write the plot description to the file
- ## return image tag for the plot
+ &Apache::lonxml::deregister('Apache::lonplot',
+ ('title','xlabel','ylabel','key','axis','label','curve'));
+ my $result = '';
+ if ($target eq 'web') {
+ ## Determine filename -- Need to use the 'id' thingy that Gerd
+ ## mentioned.
+ my $tmpdir = '/home/httpd/perl/tmp/';
+ my $filename = $ENV{'user.name'}.'_'.$ENV{'user.domain'}.
+ '_plot.data';
+ ## Write the plot description to the file
+ my $fh=Apache::File->new(">$tmpdir$filename");
+ $result .= '<pre>';
+ $result .= $filename.$/;
+ print $fh &write_gnuplot_file();
+ $result .= '</pre>'.$/;
+ ## return image tag for the plot
+ $result .= <<"ENDIMAGE";
+<img src = "/cgi-bin/plot.gif?$filename"
+ alt = "/cgi-bin/plot.gif?$filename" />
+ENDIMAGE
+ }
return $result;
}
+
##----------------------------------------------------------------- key
sub start_key {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
- &get_attributes(\%key,\%key_defaults,$parstack,$safeeval);
+ &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
+ $tagstack->[-1]);
+ if ($target eq 'web') {
+ # This routine should never return anything.
+ }
return $result;
}
sub end_key {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
+ if ($target eq 'web') {
+ # This routine should never return anything.
+ }
return $result;
}
##------------------------------------------------------------------- title
@@ -157,12 +200,18 @@ sub start_title {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
$title = &Apache::lonxml::get_all_text("/title",$$parser[-1]);
my $result='';
+ if ($target eq 'web') {
+ # This routine should never return anything.
+ }
return $result;
}
sub end_title {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
+ if ($target eq 'web') {
+ # This routine should never return anything.
+ }
return $result;
}
##------------------------------------------------------------------- xlabel
@@ -170,12 +219,18 @@ sub start_xlabel {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
$xlabel = &Apache::lonxml::get_all_text("/xlabel",$$parser[-1]);
+ if ($target eq 'web') {
+ # This routine should never return anything.
+ }
return $result;
}
sub end_xlabel {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
+ if ($target eq 'web') {
+ # This routine should never return anything.
+ }
return $result;
}
##------------------------------------------------------------------- ylabel
@@ -183,28 +238,45 @@ sub start_ylabel {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
$ylabel = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]);
+ if ($target eq 'web') {
+ # This routine should never return anything.
+ }
return $result;
}
sub end_ylabel {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
+ if ($target eq 'web') {
+ # This routine should never return anything.
+ }
return $result;
}
##------------------------------------------------------------------- label
sub start_label {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
- my $label = &newhashref();
- &get_attributes($label,\%label_defaults,$parstack,$safeeval);
- $label->{'text'} = &Apache::lonxml::get_all_text("/label",$$parser[-1]);
- push(@labels,$label);
+ my %label;
+ &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
+ $tagstack->[-1]);
+ $label{'text'} = &Apache::lonxml::get_all_text("/label",$$parser[-1]);
+ if (! &$words_test($label{'text'})) {
+ # I should probably warn about it, too.
+ $label{'text'} = 'Illegal text';
+ }
+ push(@labels,\%label);
+ if ($target eq 'web') {
+ # This routine should never return anything.
+ }
return $result;
}
sub end_label {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
+ if ($target eq 'web') {
+ # This routine should never return anything.
+ }
return $result;
}
@@ -212,50 +284,92 @@ sub end_label {
sub start_curve {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
- my $curve = &newhashref();
- &get_attributes($curve,\%curve_defaults,$parstack,$safeeval);
- push (@curves,$curve);
-
- &Apache::lonxml::register('Apache::plot',('function','data'));
+ my %curve;
+ &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
+ $tagstack->[-1]);
+ push (@curves,\%curve);
+ &Apache::lonxml::register('Apache::lonplot',('function','data'));
push (@Apache::lonxml::namespace,'curve');
-
+ if ($target eq 'web') {
+ # This routine should never return anything.
+ }
return $result;
}
sub end_curve {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
+ pop @Apache::lonxml::namespace;
+ &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
+ if ($target eq 'web') {
+ # This routine should never return anything.
+ }
return $result;
}
-
##------------------------------------------------------------ curve function
sub start_function {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
-
+ if (exists($curves[-1]->{'data'})) {
+ &Apache::lonxml::warning('Use of <function> precludes use of <data>. The <data> will be omitted in favor of the <function> declaration.');
+ delete $curves[-1]->{'data'} ;
+ }
$curves[-1]->{'function'} =
&Apache::lonxml::get_all_text("/function",$$parser[-1]);
+ if ($target eq 'web') {
+ # This routine should never return anything.
+ }
return $result;
}
sub end_function {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
+ if ($target eq 'web') {
+ # This routine should never return anything.
+ }
return $result;
}
-
##------------------------------------------------------------ curve data
sub start_data {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
- push( @{$curves[-1]->{'data'}},
- &Apache::lonxml::get_all_text("/data",$$parser[-1]));
+ if (exists($curves[-1]->{'function'})) {
+ &Apache::lonxml::warning('Use of <data> precludes use of <function>.'.
+ ' The <function> will be omitted in favor of the <data>'.
+ ' declaration.');
+ delete($curves[-1]->{'function'});
+ }
+ my $datatext = &Apache::lonxml::get_all_text("/data",$$parser[-1]);
+ $datatext =~ s/\s+//g; # No whitespace, numbers must be seperated
+ # by commas
+ if ($datatext !~ /^(([+-]?\d*\.?\d*)[, ]?)+$/) {
+ &Apache::lonxml::warning('Malformed data: '.$datatext);
+ $datatext = '';
+ }
+ # Need to do some error checking on the @data array -
+ # make sure it's all numbers and make sure each array
+ # is of the same length.
+ my @data = split /,/,$datatext;
+ for (my $i=0;$i<=$#data;$i++) {
+ # Check that it's non-empty
+ # Check that it's a number
+ # Maybe I need a 'debug=on' switch to list the data set
+ # out in a warning?
+ }
+ push @{$curves[-1]->{'data'}},\@data;
+ if ($target eq 'web') {
+ # This routine should never return anything.
+ }
return $result;
}
sub end_data {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
+ if ($target eq 'web') {
+ # This routine should never return anything.
+ }
return $result;
}
@@ -263,22 +377,136 @@ sub end_data {
sub start_axis {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
- &get_attributes(\%axis,\%label_defaults,$parstack,$safeeval);
+ &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
+ $tagstack->[-1]);
+ if ($target eq 'web') {
+ # This routine should never return anything.
+ }
return $result;
}
sub end_axis {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
+ if ($target eq 'web') {
+ # This routine should never return anything.
+ }
return $result;
}
##------------------------------------------------------------------- misc
-sub newhashref{
- my %hash;
- return \%hash;
+sub get_attributes{
+ my $values = shift;
+ my $defaults = shift;
+ my $parstack = shift;
+ my $safeeval = shift;
+ my $tag = shift;
+ my $attr;
+ foreach $attr (keys %{$defaults}) {
+ $values->{$attr} =
+ &Apache::lonxml::get_param($attr,$parstack,$safeeval);
+ if ($values->{$attr} eq '' | !defined($values->{$attr})) {
+ $values->{$attr} = $defaults->{$attr}->{'default'};
+ next;
+ }
+ my $test = $defaults->{$attr}->{'test'};
+ if (! &$test($values->{$attr})) {
+ &Apache::lonxml::warning
+ ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
+ .$defaults->{$attr}->{'default'} );
+ $values->{$attr} = $defaults->{$attr}->{'default'};
+ }
+ }
+ return ;
}
+sub write_gnuplot_file {
+ my $gnuplot_input = '';
+ my $curve;
+ # Collect all the colors
+ my @Colors;
+ push @Colors, $plot{'bgcolor'};
+ push @Colors, $plot{'fgcolor'};
+ push @Colors, $axis{'color'};
+ push @Colors, $axis{'color'};
+ foreach $curve (@curves) {
+ push @Colors, ($curve->{'color'} ne '' ?
+ $curve->{'color'} :
+ $plot{'fgcolor'} );
+ }
+ # set term
+ $gnuplot_input .= 'set term gif ';
+ $gnuplot_input .= 'transparent ' if ($plot{'transparent'} eq 'on');
+ $gnuplot_input .= $plot{'font'} . ' ';
+ $gnuplot_input .= 'size '.$plot{'width'}.','.$plot{'height'}.' ';
+ $gnuplot_input .= "@Colors\n";
+ # grid
+ $gnuplot_input .= 'set grid'.$/ if ($plot{'grid'} eq 'on');
+ # border
+ $gnuplot_input .= ($plot{'border'} eq 'on'?
+ 'set border'.$/ :
+ 'set noborder'.$/ ); # title, xlabel, ylabel
+ {
+ $gnuplot_input .= <<"ENDLABELS";
+set output
+set title "$title"
+set xlabel "$xlabel"
+set ylabel "$ylabel"
+set xrange \[$axis{'xmin'}:$axis{'xmax'}\]
+set yrange \[$axis{'ymin'}:$axis{'ymax'}\]
+ENDLABELS
+ }
+ # Key
+ if (defined($key{'pos'})) {
+ $gnuplot_input .= 'set key '.$key{'pos'}.' ';
+ if ($key{'title'} ne '') {
+ $gnuplot_input .= 'title "'.$key{'title'}.'" ';
+ }
+ $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
+ } else {
+ $gnuplot_input .= 'set nokey'.$/;
+ }
+ # labels
+ my $label;
+ foreach $label (@labels) {
+ $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
+ $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'}.$/ ;
+ }
+ # curves
+ $gnuplot_input .= 'plot ';
+ my $datatext = '';
+ for (my $i = 0;$i<=$#curves;$i++) {
+ $curve = $curves[$i];
+ $gnuplot_input.= ', ' if ($i > 0);
+ if (exists($curve->{'function'})) {
+ $gnuplot_input.=
+ $curve->{'function'}.' title "'.
+ $curve->{'name'}.'" with '.
+ $curve->{'linestyle'};
+ } elsif (exists($curve->{'data'})) {
+ $gnuplot_input.= '\'-\' title "'.
+ $curve->{'name'}.'" with '.
+ $curve->{'linestyle'};
+ my @Data = @{$curve->{'data'}};
+ my @Data0 = @{$Data[0]};
+ for (my $i =0; $i<=$#Data0; $i++) {
+ my $dataset;
+ foreach $dataset (@Data) {
+ $datatext .= $dataset->[$i] . ' ';
+ }
+ $datatext .= $/;
+ }
+ $datatext .=$/;
+ }
+ }
+ $gnuplot_input .= $/.$datatext;
+ return $gnuplot_input;
+}
1;
__END__
+
+
+
+
+