[WWcvs] pg: forward port of the rel-2-4-5 changes that allow BEGIN_HINT, etc.

[Mike G. v. a. <we...@ma...>]

Log Message:
-----------
forward port
of the rel-2-4-5 changes that allow BEGIN_HINT, etc.

Modified Files:
--------------
    pg/lib/WeBWorK/PG:
        Translator.pm

Revision Data
-------------
Index: Translator.pm
===================================================================
RCS file: /webwork/cvs/system/pg/lib/WeBWorK/PG/Translator.pm,v
retrieving revision 1.20
retrieving revision 1.21
diff -Llib/WeBWorK/PG/Translator.pm -Llib/WeBWorK/PG/Translator.pm -u -r1.20 -r1.21
--- lib/WeBWorK/PG/Translator.pm
+++ lib/WeBWorK/PG/Translator.pm
@@ -154,6 +154,8 @@
 	my $class = shift;
 	my $safe_cmpt = new Safe; #('PG_priv');
 	my $self = {
+	    preprocess_code           =>  \&default_preprocess_code,
+	    postprocess_code           => \&default_postprocess_code,
 		envir                     => undef,
 		PG_PROBLEM_TEXT_ARRAY_REF => [],
 		PG_PROBLEM_TEXT_REF       => 0,
@@ -882,13 +884,19 @@
 		    ##########################################
 		    ###### PG preprocessing code #############
 		    ##########################################
-		        # BEGIN_TEXT and END_TEXT must occur on a line by themselves.
-		        $evalString =~ s/\n\s*END_TEXT[\s;]*\n/\nEND_TEXT\n/g;
-		    	$evalString =~ s/\n\s*BEGIN_TEXT[\s;]*\n/\nTEXT\(EV3\(<<'END_TEXT'\)\);\n/g;
-		    	$evalString =~ s/ENDDOCUMENT.*/ENDDOCUMENT();/s; # remove text after ENDDOCUMENT
+		    
+		        $evalString = &{$self->{preprocess_code}}($evalString);
+
+		     
+#               # default_preprocess_code
+#		        # BEGIN_TEXT and END_TEXT must occur on a line by themselves.
+#		        $evalString =~ s/\n\s*END_TEXT[\s;]*\n/\nEND_TEXT\n/g;
+#		    	$evalString =~ s/\n\s*BEGIN_TEXT[\s;]*\n/\nTEXT\(EV3\(<<'END_TEXT'\)\);\n/g;
+#		    	$evalString =~ s/ENDDOCUMENT.*/ENDDOCUMENT();/s; # remove text after ENDDOCUMENT
+#
+#				$evalString =~ s/\\/\\\\/g;    # \ can't be used for escapes because of TeX conflict
+#		        $evalString =~ s/~~/\\/g;      # use ~~ as escape instead, use # for comments
 
-				$evalString =~ s/\\/\\\\/g;    # \ can't be used for escapes because of TeX conflict
-		        $evalString =~ s/~~/\\/g;      # use ~~ as escape instead, use # for comments
 
 =pod
 
@@ -922,6 +930,12 @@
         ##########  end  EVALUATION code                                  ###########
         #############################################################################
 
+		    ##########################################
+		    ###### PG postprocessing code #############
+		    ##########################################
+			$PG_PROBLEM_TEXT_REF = &{$self->{postprocess_code}}($PG_PROBLEM_TEXT_REF);
+
+
 =pod
 
 (5) B<Process errors>
@@ -960,7 +974,7 @@
                 	$self -> {errors}."\r\n" .
                 	"****************<BR>\n");
 
-                push(@PROBLEM_TEXT_OUTPUT   , "------Input Read\r\n");
+               push(@PROBLEM_TEXT_OUTPUT   , "------Input Read\r\n");
                $self->{source} =~ s/</&lt;/g;
                @input=split("\n", $self->{source});
                $lineNumber = 1;
@@ -1607,6 +1621,37 @@
 
 }
 
+sub original_preprocess_code {
+	my $evalString = shift;
+	# BEGIN_TEXT and END_TEXT must occur on a line by themselves.
+	$evalString =~ s/\n\s*END_TEXT[\s;]*\n/\nEND_TEXT\n/g;
+	$evalString =~ s/\n\s*BEGIN_TEXT[\s;]*\n/\nTEXT\(EV3\(<<'END_TEXT'\)\);\n/g;
+	$evalString =~ s/ENDDOCUMENT.*/ENDDOCUMENT();/s; # remove text after ENDDOCUMENT
+
+	$evalString =~ s/\\/\\\\/g;    # \ can't be used for escapes because of TeX conflict
+	$evalString =~ s/~~/\\/g;      # use ~~ as escape instead, use # for comments
+	$evalString;
+}
+sub default_preprocess_code {
+	my $evalString = shift;
+	# BEGIN_TEXT and END_TEXT must occur on a line by themselves.
+	$evalString =~ s/\n\s*END_TEXT[\s;]*\n/\nEND_TEXT\n/g;
+	$evalString =~ s/\n\s*END_SOLUTION[\s;]*\n/\nEND_SOLUTION\n/g;
+	$evalString =~ s/\n\s*END_HINT[\s;]*\n/\nEND_HINT\n/g;
+	$evalString =~ s/\n\s*BEGIN_TEXT[\s;]*\n/\nTEXT\(EV3\(<<'END_TEXT'\)\);\n/g;
+	$evalString =~ s/\n\s*BEGIN_SOLUTION[\s;]*\n/\nSOLUTION\(EV3\(<<'END_SOLUTION'\)\);\n/g;
+	$evalString =~ s/\n\s*BEGIN_HINT[\s;]*\n/\nHINT\(EV3\(<<'END_HINT'\)\);\n/g;
+	$evalString =~ s/ENDDOCUMENT.*/ENDDOCUMENT();/s; # remove text after ENDDOCUMENT
+
+	$evalString =~ s/\\/\\\\/g;    # \ can't be used for escapes because of TeX conflict
+	$evalString =~ s/~~/\\/g;      # use ~~ as escape instead, use # for comments
+	$evalString;
+}
+sub default_postprocess_code {
+	my $evalString_ref = shift;
+	$evalString_ref;
+}
+
 sub dumpvar {
     my ($packageName) = @_;