Incorrect handling of string with spaces and no quotes

During some tests on the documentation of LLVM the (CMake generated) doxygen configuration file contained the line:
```
DOT_PATH=D:\Program Files (x86)\Graphviz2.38\bin\dot.exe
```
and this was interpreted by doxygen as
```
DOT_PATH               = D:\ProgramFiles(x86)\Graphviz2.38\bin\dot.exe
```
without any message other  than that later on  the `dot` executable could not be found.
It is clear that here the double quotes were missing.

This problem has been solved by giving a warning and setting the value to the default value.
- configimpl.l
- config_doxyw.l

during the checking some debug facilities for the doxywizard were required and this has been implemented:
- config_doxyw.l
- doxywizard.h
- doxywizard.cpp

it was also discovered that in case of none existing int or bool values were specified the wrong "defaults" were taken (it was set to `0` / `false`), now the correct defaults are taken
- inputbool.cpp
- inputint.cpp

5 files changed, 233 insertions, 88 deletions

diff --git a/addon/doxywizard/config_doxyw.l b/addon/doxywizard/config_doxyw.l
index 554571f..db7b05a 100644
--- a/addon/doxywizard/config_doxyw.l
+++ b/addon/doxywizard/config_doxyw.l
@@ -3,8 +3,8 @@
  * Copyright (C) 1997-2019 by Dimitri van Heesch.
  *
  * Permission to use, copy, modify, and distribute this software and its
- * documentation under the terms of the GNU General Public License is hereby 
- * granted. No representations are made about the suitability of this software 
+ * documentation under the terms of the GNU General Public License is hereby
+ * granted. No representations are made about the suitability of this software
  * for any purpose. It is provided "as is" without express or implied warranty.
  * See the GNU General Public License for more details.
  *
@@ -24,6 +24,7 @@
 #include "config.h"
 #include "input.h"
 #include "inputstring.h"
+#include "doxywizard.h"
 
 #include <QString>
 #include <QVariant>
@@ -53,14 +54,14 @@ struct ConfigFileState
   YY_BUFFER_STATE oldState;
   YY_BUFFER_STATE newState;
   QString fileName;
-};  
+};
 
 static const QHash<QString,Input*>   *g_options;
 static FILE                          *g_file;
 static QString                        g_yyFileName;
 static QString                        g_includeName;
 static QVariant                       g_includePathList;
-static QStack<ConfigFileState*>       g_includeStack;  
+static QStack<ConfigFileState*>       g_includeStack;
 static int                            g_includeDepth;
 static QVariant                      *g_arg;
 static Input                         *g_curOption=0;
@@ -69,6 +70,8 @@ static QTextCodec                    *g_codec     = QTextCodec::codecForName("UT
 static QString                        g_codecName = QString::fromLatin1("UTF-8");
 static int                            g_lastState;
 static QByteArray                     g_tmpString;
+static QString                        g_cmd;
+static int                            g_part;
 
 static const char *stateToString(int state);
 
@@ -80,11 +83,11 @@ static const char *stateToString(int state);
 static yy_size_t yyread(char *buf,int maxSize)
 {
     // no file included
-    if (g_includeStack.isEmpty()) 
+    if (g_includeStack.isEmpty())
     {
       return fread(buf,1,maxSize,g_file);
-    } 
-    else 
+    }
+    else
     {
       return fread(buf,1,maxSize,g_includeStack.top()->file);
     }
@@ -96,19 +99,39 @@ static QString error_str = QString::fromLatin1("error: ");
 void config_err(const char *fmt, ...)
 {
   QString msg = error_str;
+
   msg.append(QString::fromLatin1(fmt));
   va_list args;
   va_start(args, fmt);
-  vfprintf(stderr, qPrintable(msg), args);
+  if (DoxygenWizard::debugFlag)
+  {
+    char debugOut[1000]; // this size should be sufficient
+    vsnprintf(debugOut, 1000,qPrintable(msg), args);
+    MainWindow::instance().outputLogText(QString::fromLatin1(debugOut));
+  }
+  else
+  {
+    vfprintf(stderr, qPrintable(msg), args);
+  }
   va_end(args);
 }
 void config_warn(const char *fmt, ...)
 {
   QString msg = warning_str;
+
   msg.append(QString::fromLatin1(fmt));
   va_list args;
   va_start(args, fmt);
-  vfprintf(stderr, qPrintable(msg), args);
+  if (DoxygenWizard::debugFlag)
+  {
+    char debugOut[1000];
+    vsnprintf(debugOut, 1000,qPrintable(msg), args);
+    MainWindow::instance().outputLogText(QString::fromLatin1(debugOut));
+  }
+  else
+  {
+    vfprintf(stderr, qPrintable(msg), args);
+  }
   va_end(args);
 }
 
@@ -138,7 +161,7 @@ static FILE *tryPath(const QString &path,const QString &fileName)
     FILE *f = fopen(absName.toLocal8Bit(),"r");
     if (f==NULL)
       config_err("could not open file %s for reading\n",qPrintable(absName));
-    else 
+    else
       return f;
   }
   return NULL;
@@ -154,7 +177,7 @@ static FILE *findFile(const QString &fileName)
   // relative path, try with include paths in the list
   QStringList sl = g_includePathList.toStringList();
   substEnvVarsInStrList(sl);
-  foreach (QString s, sl) 
+  foreach (QString s, sl)
   {
     FILE *f = tryPath(s,fileName);
     if (f) return f;
@@ -165,18 +188,18 @@ static FILE *findFile(const QString &fileName)
 
 static void readIncludeFile(const QString &incName)
 {
-  if (g_includeDepth==MAX_INCLUDE_DEPTH) 
+  if (g_includeDepth==MAX_INCLUDE_DEPTH)
   {
     config_err("maximum include depth (%d) reached, %s is not included. Aborting...\n",
 	MAX_INCLUDE_DEPTH,qPrintable(incName));
     exit(1);
-  } 
+  }
 
   QString inc = incName;
   substEnvVarsInString(inc);
   inc = inc.trimmed();
   uint incLen = inc.length();
-  if (inc.at(0)==QChar::fromLatin1('"') && 
+  if (inc.at(0)==QChar::fromLatin1('"') &&
       inc.at(incLen-1)==QChar::fromLatin1('"')) // strip quotes
   {
     inc=inc.mid(1,incLen-2);
@@ -191,7 +214,7 @@ static void readIncludeFile(const QString &incName)
     msg("@INCLUDE = %s: parsing...\n",qPrintable(inc));
 #endif
 
-    // store the state of the old file 
+    // store the state of the old file
     ConfigFileState *fs=new ConfigFileState;
     fs->oldState=YY_CURRENT_BUFFER;
     fs->fileName=g_yyFileName;
@@ -203,7 +226,7 @@ static void readIncludeFile(const QString &incName)
     fs->newState=YY_CURRENT_BUFFER;
     g_yyFileName=inc;
     g_includeDepth++;
-  } 
+  }
   else
   {
     config_err("@INCLUDE = %s: not found!\n",qPrintable(inc));
@@ -225,20 +248,20 @@ static void readIncludeFile(const QString &incName)
 %x      GetEnum
 %x      GetStrList
 %x      GetQuotedString
-%x      GetEnvVar
 %x      Include
 
 %%
 
 <*>\0x0d
 <Start,GetString,GetEnum,GetStrList,SkipInvalid>"#"	 { BEGIN(SkipComment); }
-<Start>[a-z_A-Z][a-z_A-Z0-9]*[ \t]*"="	 { QString cmd = g_codec->toUnicode(yytext);
-                                           cmd=cmd.left(cmd.length()-1).trimmed(); 
-					   g_curOption = g_options->value(cmd);
+<Start>[a-z_A-Z][a-z_A-Z0-9]*[ \t]*"="	 { g_cmd = g_codec->toUnicode(yytext);
+                                           g_part = 0;
+                                           g_cmd=g_cmd.left(g_cmd.length()-1).trimmed();
+					   g_curOption = g_options->value(g_cmd);
 					   if (g_curOption==0) // oops not known
 					   {
 					     config_warn("ignoring unsupported tag '%s' at line %d, file %s\n",
-						 qPrintable(cmd),yylineno,qPrintable(g_yyFileName)); 
+						 qPrintable(g_cmd),yylineno,qPrintable(g_yyFileName));
 					     BEGIN(SkipInvalid);
 					   }
 					   else // known tag
@@ -271,20 +294,20 @@ static void readIncludeFile(const QString &incName)
 					       case Input::Obsolete:
 					         config_warn("Tag '%s' at line %d of file %s has become obsolete.\n"
 						            "To avoid this warning please update your configuration "
-							    "file using \"doxygen -u\"\n", qPrintable(cmd),
-							    yylineno,qPrintable(g_yyFileName)); 
+							    "file using \"doxygen -u\"\n", qPrintable(g_cmd),
+							    yylineno,qPrintable(g_yyFileName));
 					         BEGIN(SkipInvalid);
 						 break;
 					     }
 					   }
 					}
-<Start>[a-z_A-Z][a-z_A-Z0-9]*[ \t]*"+="	{ QString cmd=g_codec->toUnicode(yytext);
-                                          cmd=cmd.left(cmd.length()-2).trimmed(); 
-					  g_curOption = g_options->value(cmd);
+<Start>[a-z_A-Z][a-z_A-Z0-9]*[ \t]*"+="	{ g_cmd=g_codec->toUnicode(yytext);
+                                          g_cmd=g_cmd.left(g_cmd.length()-2).trimmed();
+					  g_curOption = g_options->value(g_cmd);
 					  if (g_curOption==0) // oops not known
 					  {
 					    config_warn("ignoring unsupported tag '%s' at line %d, file %s\n",
-						yytext,yylineno,qPrintable(g_yyFileName)); 
+						yytext,yylineno,qPrintable(g_yyFileName));
 					    BEGIN(SkipInvalid);
 					  }
 					  else // known tag
@@ -299,15 +322,15 @@ static void readIncludeFile(const QString &incName)
 					      case Input::String:
 					      case Input::Int:
 					      case Input::Bool:
-					        config_warn("operator += not supported for '%s'. Ignoring line at line %d, file %s\n",
-						    yytext,yylineno,qPrintable(g_yyFileName)); 
+					        config_warn("operator += not supported for '%s'. Ignoring line %d, file %s\n",
+						    qPrintable(g_cmd),yylineno,qPrintable(g_yyFileName));
 					        BEGIN(SkipInvalid);
 						break;
 					      case Input::Obsolete:
 					         config_warn("Tag '%s' at line %d of file %s has become obsolete.\n"
 						            "To avoid this warning please update your configuration "
-							    "file using \"doxygen -u\"\n", 
-							    qPrintable(cmd),yylineno,qPrintable(g_yyFileName)); 
+							    "file using \"doxygen -u\"\n",
+							    qPrintable(g_cmd),yylineno,qPrintable(g_yyFileName));
 					         BEGIN(SkipInvalid);
 						 break;
 					     }
@@ -316,8 +339,8 @@ static void readIncludeFile(const QString &incName)
 <Start>"@INCLUDE_PATH"[ \t]*"=" 	{ BEGIN(GetStrList); g_arg=&g_includePathList; *g_arg = QStringList(); g_elemStr=QString(); }
   /* include a config file */
 <Start>"@INCLUDE"[ \t]*"="     		{ BEGIN(Include);}
-<Include>([^ \"\t\r\n]+)|("\""[^\n\"]+"\"") { 
-  					  readIncludeFile(g_codec->toUnicode(yytext)); 
+<Include>([^ \"\t\r\n]+)|("\""[^\n\"]+"\"") {
+  					  readIncludeFile(g_codec->toUnicode(yytext));
   					  BEGIN(Start);
 					}
 <<EOF>>					{
@@ -336,20 +359,20 @@ static void readIncludeFile(const QString &incName)
 					    yy_switch_to_buffer( fs->oldState );
 					    yy_delete_buffer( oldBuf );
 					    g_yyFileName=fs->fileName;
-					    delete fs; 
+					    delete fs;
                                             g_includeDepth--;
 					  }
   					}
 
 <Start>[a-z_A-Z0-9]+			{ config_warn("ignoring unknown tag '%s' at line %d, file %s\n",yytext,yylineno,qPrintable(g_yyFileName)); }
 <GetString,GetEnum,SkipInvalid>\n	        { BEGIN(Start); }
-<GetStrList>\n				{ 
+<GetStrList>\n				{
 					  if (!g_elemStr.isEmpty())
 					  {
 					    //printf("elemStr1='%s'\n",qPrintable(elemStr));
 					    *g_arg = QVariant(g_arg->toStringList() << g_elemStr);
 					  }
-					  BEGIN(Start); 
+					  BEGIN(Start);
 					}
 <GetStrList>[ \t]+			{
   				          if (!g_elemStr.isEmpty())
@@ -360,30 +383,94 @@ static void readIncludeFile(const QString &incName)
 					  g_elemStr = QString();
   					}
 <GetString>[^ \"\t\r\n]+		{
-                                          *g_arg = QVariant(g_codec->toUnicode(yytext)); 
-                                          checkEncoding();
+                                          if (g_part == 1) // multiple unquoted parts, reset to default
+                                          {
+                                            config_warn("Invalid value for '%s' tag in line %d, file %s\n"
+                                                        "Value should not contain unquoted whitespace, "
+                                                        "using the default\n",
+                                                        qPrintable(g_cmd),yylineno,qPrintable(g_yyFileName));
+                                            *g_arg=QVariant(g_codec->toUnicode(""));
+                                          }
+                                          else if (g_part > 1) // multiple unquoted parts, reset to default
+                                          {
+                                            *g_arg=QVariant(g_codec->toUnicode(""));
+                                          }
+                                          else
+                                          {
+                                            *g_arg = QVariant(g_codec->toUnicode(yytext));
+                                            checkEncoding();
+                                          }
+                                          g_part++;
                                         }
 <GetEnum>[^ \"\t\r\n]+			{
                                           InputString *cur = dynamic_cast<InputString *>(g_curOption);
-                                          *g_arg = cur->checkEnumVal(g_codec->toUnicode(yytext));
+                                          if (g_part == 1) // multiple unquoted parts, reset to default
+                                          {
+                                            config_warn("Invalid value for '%s' tag in line %d, file %s\n"
+                                                        "Value should not contain unquoted whitespace, "
+                                                        "using the default\n",
+                                                        qPrintable(g_cmd),yylineno,qPrintable(g_yyFileName));
+                                            *g_arg=QVariant(g_codec->toUnicode(""));
+                                          }
+                                          else if (g_part > 1) // multiple unquoted parts, reset to default
+                                          {
+                                            *g_arg=QVariant(g_codec->toUnicode(""));
+                                          }
+                                          else
+                                          {
+                                            *g_arg = cur->checkEnumVal(g_codec->toUnicode(yytext));
+                                          }
+                                          g_part++;
                                         }
 <GetString,GetEnum,GetStrList,SkipInvalid>"\""	{ g_lastState=YY_START;
-  					  BEGIN(GetQuotedString); 
+  					  BEGIN(GetQuotedString);
                                           g_tmpString="";
 					}
-<GetQuotedString>"\""|"\n" 		{ 
+<GetQuotedString>"\""|"\n" 		{
                                           // we add a bogus space to signal that the string was quoted. This space will be stripped later on.
                                           g_tmpString+=" ";
   					  //printf("Quoted String = '%s'\n",qPrintable(tmpString));
 					  if (g_lastState==GetString)
 					  {
-					    *g_arg = g_codec->toUnicode(g_tmpString);
-                                            checkEncoding();
+                                            if (g_part == 1) // multiple unquoted parts, reset to default
+                                            {
+                                              config_warn("Invalid value for '%s' tag in line %d, file %s\n"
+                                                          "Value should not contain unquoted whitespace, "
+                                                          "using the default\n",
+                                                          qPrintable(g_cmd),yylineno,qPrintable(g_yyFileName));
+                                              *g_arg=g_codec->toUnicode("");
+                                            }
+                                            else if (g_part > 1) // multiple unquoted parts, reset to default
+                                            {
+                                              *g_arg=g_codec->toUnicode("");
+                                            }
+                                            else
+                                            {
+					      *g_arg = g_codec->toUnicode(g_tmpString);
+                                              checkEncoding();
+					    }
+                                            g_part++;
 					  }
 					  else if (g_lastState==GetEnum)
 					  {
-                                            InputString *cur = dynamic_cast<InputString *>(g_curOption);
-                                            *g_arg = cur->checkEnumVal(g_codec->toUnicode(g_tmpString));
+                                            if (g_part == 1) // multiple unquoted parts, reset to default
+                                            {
+                                              config_warn("Invalid value for '%s' tag in line %d, file %s\n"
+                                                          "Value should not contain unquoted whitespace, "
+                                                          "using the default\n",
+                                                          qPrintable(g_cmd),yylineno,qPrintable(g_yyFileName));
+                                              *g_arg=g_codec->toUnicode("");
+                                            }
+                                            else if (g_part > 1) // multiple unquoted parts, reset to default
+                                            {
+                                              *g_arg=g_codec->toUnicode("");
+                                            }
+                                            else
+                                            {
+                                              InputString *cur = dynamic_cast<InputString *>(g_curOption);
+                                              *g_arg = cur->checkEnumVal(g_codec->toUnicode(g_tmpString));
+					    }
+                                            g_part++;
 					  }
 					  else
 					  {
@@ -442,7 +529,7 @@ static void substEnvVarsInStrList(QStringList &sl)
   foreach (QString result, sl)
   {
     // an argument with quotes will have an extra space at the end, so wasQuoted will be TRUE.
-    bool wasQuoted = (result.indexOf(QChar::fromLatin1(' '))!=-1) || 
+    bool wasQuoted = (result.indexOf(QChar::fromLatin1(' '))!=-1) ||
                      (result.indexOf(QChar::fromLatin1('\t'))!=-1);
     // here we strip the quote again
     substEnvVarsInString(result);
@@ -452,7 +539,7 @@ static void substEnvVarsInStrList(QStringList &sl)
     if (!wasQuoted) /* as a result of the expansion, a single string
 		       may have expanded into a list, which we'll
 		       add to sl. If the original string already
-		       contained multiple elements no further 
+		       contained multiple elements no further
 		       splitting is done to allow quoted items with spaces! */
     {
       int l=result.length();
@@ -463,11 +550,11 @@ static void substEnvVarsInStrList(QStringList &sl)
       {
 	QChar c=0;
 	// skip until start of new word
-	while (i<l && ((c=result.at(i))==QChar::fromLatin1(' ') || c==QChar::fromLatin1('\t'))) i++; 
+	while (i<l && ((c=result.at(i))==QChar::fromLatin1(' ') || c==QChar::fromLatin1('\t'))) i++;
 	p=i; // p marks the start index of the word
 	// skip until end of a word
-	while (i<l && ((c=result.at(i))!=QChar::fromLatin1(' ') && 
-	              c!=QChar::fromLatin1('\t') && 
+	while (i<l && ((c=result.at(i))!=QChar::fromLatin1(' ') &&
+	              c!=QChar::fromLatin1('\t') &&
 		      c!=QChar::fromLatin1('"'))) i++;
 	if (i<l) // not at the end of the string
 	{
@@ -481,7 +568,7 @@ static void substEnvVarsInStrList(QStringList &sl)
 	      {
                 out += result.mid(p,i-p);
 		p=i+1;
-		break; 
+		break;
 	      }
 	      else if (c==QChar::fromLatin1('\\')) // skip escaped stuff
 	      {
@@ -516,13 +603,18 @@ bool parseConfig(
       const QHash<QString,Input *> &options
     )
 {
+  yylineno = 1;
+  if (DoxygenWizard::debugFlag)
+  {
+    MainWindow::instance().outputLogStart();
+  }
   QHashIterator<QString, Input*> i(options);
   g_file = fopen(fileName.toLocal8Bit(),"r");
   if (g_file==NULL) return false;
 
   // reset all values
   i.toFront();
-  while (i.hasNext()) 
+  while (i.hasNext())
   {
     i.next();
     if (i.value())
@@ -542,7 +634,7 @@ bool parseConfig(
 
   // update the values in the UI
   i.toFront();
-  while (i.hasNext()) 
+  while (i.hasNext())
   {
     i.next();
     if (i.value())
@@ -554,8 +646,12 @@ bool parseConfig(
     {
       printf("Invalid option: %s\n",qPrintable(i.key()));
     }
-  } 
+  }
   fclose(g_file);
+  if (DoxygenWizard::debugFlag)
+  {
+    MainWindow::instance().outputLogFinish();
+  }
   return true;
 }
 
@@ -572,29 +668,29 @@ void writeStringValue(QTextStream &t,QTextCodec *codec,const QString &s)
   {
     if (*p != QChar::fromLatin1('"'))
     {
-      while (!(c=*p++).isNull() && !needsEscaping) 
+      while (!(c=*p++).isNull() && !needsEscaping)
       {
-        needsEscaping = (c==QChar::fromLatin1(' ')  || 
-	                 c==QChar::fromLatin1('\n') || 
-		         c==QChar::fromLatin1('\t') || 
+        needsEscaping = (c==QChar::fromLatin1(' ')  ||
+	                 c==QChar::fromLatin1('\n') ||
+		         c==QChar::fromLatin1('\t') ||
 		         c==QChar::fromLatin1('"'));
       }
       p=s.data();
-      while (!(c=*p++).isNull() && !needsHashEscaping) 
+      while (!(c=*p++).isNull() && !needsHashEscaping)
       {
         needsHashEscaping = (c==QChar::fromLatin1('#'));
       }
     }
     if (needsHashEscaping || needsEscaping)
-    { 
+    {
       t << "\"";
     }
     if (needsEscaping)
-    { 
+    {
       p=s.data();
       while (!p->isNull())
       {
-	if (*p   ==QChar::fromLatin1(' ') && 
+	if (*p   ==QChar::fromLatin1(' ') &&
 	   *(p+1)==QChar::fromLatin1('\0')) break; // skip inserted space at the end
 	if (*p   ==QChar::fromLatin1('"')) t << "\\"; // escape quotes
 	t << *p++;
@@ -605,7 +701,7 @@ void writeStringValue(QTextStream &t,QTextCodec *codec,const QString &s)
       t << s;
     }
     if (needsHashEscaping || needsEscaping)
-    { 
+    {
       t << "\"";
     }
   }
diff --git a/addon/doxywizard/doxywizard.cpp b/addon/doxywizard/doxywizard.cpp
index e621e0b..5b0becc 100755
--- a/addon/doxywizard/doxywizard.cpp
+++ b/addon/doxywizard/doxywizard.cpp
@@ -42,6 +42,9 @@
 
 #define MAX_RECENT_FILES 10
 
+// globally accessible variables
+bool DoxygenWizard::debugFlag = false;
+
 const int messageTimeout = 5000; //!< status bar message timeout in milliseconds.
 
 #define APPQT(x) QString::fromLatin1("<qt><pre>") + x + QString::fromLatin1("</pre></qt>")
@@ -725,11 +728,26 @@ bool MainWindow::discardUnsavedChanges(bool saveOption)
   return true;
 }
 
+void MainWindow::outputLogStart()
+{
+  m_outputLog->clear();
+}
+void MainWindow::outputLogText(QString text)
+{
+  m_outputLog->append(APPQT(text));
+}
+void MainWindow::outputLogFinish()
+{
+  m_outputLog->ensureCursorVisible();
+  m_saveLog->setEnabled(true);
+}
 //-----------------------------------------------------------------------
 int main(int argc,char **argv)
 {
   QApplication a(argc,argv);
-  if (argc == 2)
+  int locArgc = argc;
+
+  if (locArgc == 2)
   {
     if (!qstrcmp(argv[1],"--help"))
     {
@@ -746,7 +764,13 @@ int main(int argc,char **argv)
       exit(0);
     }
   }
-  if (argc > 2)
+  if (!qstrcmp(argv[1],"--debug") && ((locArgc == 2) || (locArgc == 3)))
+  {
+    DoxygenWizard::debugFlag = true;
+    locArgc--;
+  }
+
+  if (locArgc > 2)
   {
     QMessageBox msgBox;
     msgBox.setText(QString::fromLatin1("Too many arguments specified\n\nUsage: %1 [config file]").arg(QString::fromLatin1(argv[0])));
@@ -756,9 +780,9 @@ int main(int argc,char **argv)
   else
   {
     MainWindow &main = MainWindow::instance();
-    if (argc==2 && argv[1][0]!='-') // name of config file as an argument
+    if (locArgc==2 && argv[argc-1][0]!='-') // name of config file as an argument
     {
-      main.loadConfigFromFile(QString::fromLocal8Bit(argv[1]));
+      main.loadConfigFromFile(QString::fromLocal8Bit(argv[argc-1]));
     }
     main.show();
     return a.exec();
diff --git a/addon/doxywizard/doxywizard.h b/addon/doxywizard/doxywizard.h
index 3fc2b65..eadd51b 100755
--- a/addon/doxywizard/doxywizard.h
+++ b/addon/doxywizard/doxywizard.h
@@ -41,6 +41,10 @@ class MainWindow : public QMainWindow
     void closeEvent(QCloseEvent *event);
     QString configFileName() const { return m_fileName; }
     void updateTitle();
+    // access routines for outputLog pane
+    void MainWindow::outputLogStart();
+    void MainWindow::outputLogText(QString text);
+    void MainWindow::outputLogFinish();
 
   public slots:
     void manual();
@@ -101,4 +105,13 @@ class MainWindow : public QMainWindow
     bool m_modified;
 };
 
+/*! \brief This class serves as a namespace for global variables used by the doxygen wizard.
+ *
+ *  All fields in this class are public and static, so they can be used directly.
+ */
+class DoxygenWizard
+{
+  public:
+    static bool debugFlag;
+};
 #endif
diff --git a/addon/doxywizard/inputbool.cpp b/addon/doxywizard/inputbool.cpp
index 3c917a8..65e1d26 100644
--- a/addon/doxywizard/inputbool.cpp
+++ b/addon/doxywizard/inputbool.cpp
@@ -3,8 +3,8 @@
  * Copyright (C) 1997-2019 by Dimitri van Heesch.
  *
  * Permission to use, copy, modify, and distribute this software and its
- * documentation under the terms of the GNU General Public License is hereby 
- * granted. No representations are made about the suitability of this software 
+ * documentation under the terms of the GNU General Public License is hereby
+ * granted. No representations are made about the suitability of this software
  * for any purpose. It is provided "as is" without express or implied warranty.
  * See the GNU General Public License for more details.
  *
@@ -18,7 +18,7 @@
 #include <QTextCodec>
 #include <QGridLayout>
 
-InputBool::InputBool( QGridLayout *layout, int &row, 
+InputBool::InputBool( QGridLayout *layout, int &row,
                       const QString &id, bool checked,
                       const QString &docs )
   : m_default(checked), m_docs(docs), m_id(id)
@@ -42,10 +42,10 @@ void InputBool::help()
 }
 
 void InputBool::setEnabled(bool b)
-{ 
+{
   m_enabled = b;
-  m_cb->setEnabled(b); 
-  m_lab->setEnabled(b); 
+  m_cb->setEnabled(b);
+  m_lab->setEnabled(b);
   updateDefault();
   updateDependencies();
 }
@@ -60,7 +60,7 @@ void InputBool::updateDependencies()
 
 void InputBool::setValue( bool s )
 {
-  if (m_state!=s) 
+  if (m_state!=s)
   {
     m_state=s;
     updateDefault();
@@ -91,9 +91,18 @@ QVariant &InputBool::value()
 void InputBool::update()
 {
   QString v = m_value.toString().toLower();
-  m_state = (v==QString::fromLatin1("yes")  || 
-             v==QString::fromLatin1("true") || 
-             v==QString::fromLatin1("1"));
+  if (v==QString::fromLatin1("yes")  || v==QString::fromLatin1("true")  || v==QString::fromLatin1("1"))
+  {
+    m_state = true;
+  }
+  else if (v==QString::fromLatin1("no")   || v==QString::fromLatin1("false") || v==QString::fromLatin1("0"))
+  {
+    m_state = false;
+  }
+  else
+  {
+    m_state = m_default;
+  }
   m_cb->setChecked( m_state );
   updateDefault();
   updateDependencies();
@@ -106,9 +115,9 @@ void InputBool::reset()
 
 void InputBool::writeValue(QTextStream &t,QTextCodec *codec)
 {
-  if (m_state) 
-    t << codec->fromUnicode(QString::fromLatin1("YES")); 
-  else 
+  if (m_state)
+    t << codec->fromUnicode(QString::fromLatin1("YES"));
+  else
     t << codec->fromUnicode(QString::fromLatin1("NO"));
 }
 
diff --git a/addon/doxywizard/inputint.cpp b/addon/doxywizard/inputint.cpp
index bcba86a..d97f1b0 100644
--- a/addon/doxywizard/inputint.cpp
+++ b/addon/doxywizard/inputint.cpp
@@ -3,8 +3,8 @@
  * Copyright (C) 1997-2019 by Dimitri van Heesch.
  *
  * Permission to use, copy, modify, and distribute this software and its
- * documentation under the terms of the GNU General Public License is hereby 
- * granted. No representations are made about the suitability of this software 
+ * documentation under the terms of the GNU General Public License is hereby
+ * granted. No representations are made about the suitability of this software
  * for any purpose. It is provided "as is" without express or implied warranty.
  * See the GNU General Public License for more details.
  *
@@ -28,7 +28,7 @@ class NoWheelSpinBox : public QSpinBox
 };
 
 InputInt::InputInt( QGridLayout *layout,int &row,
-                    const QString & id, 
+                    const QString & id,
                     int defVal, int minVal,int maxVal,
                     const QString & docs )
   : m_default(defVal), m_minVal(minVal), m_maxVal(maxVal), m_docs(docs), m_id(id)
@@ -44,7 +44,7 @@ InputInt::InputInt( QGridLayout *layout,int &row,
   layout->addWidget( m_lab, row, 0 );
   layout->addWidget( m_sp, row, 1 );
 
-  connect(m_sp, SIGNAL(valueChanged(int)), 
+  connect(m_sp, SIGNAL(valueChanged(int)),
           this, SLOT(setValue(int)) );
   connect( m_lab, SIGNAL(enter()), SLOT(help()) );
   connect( m_lab, SIGNAL(reset()), SLOT(reset()) );
@@ -61,7 +61,7 @@ void InputInt::setValue(int val)
 {
   val = qMax(m_minVal,val);
   val = qMin(m_maxVal,val);
-  if (val!=m_val) 
+  if (val!=m_val)
   {
     m_val = val;
     m_sp->setValue(val);
@@ -81,7 +81,7 @@ void InputInt::updateDefault()
     {
       m_lab->setText(QString::fromLatin1("<qt><font color='red'>")+m_id+QString::fromLatin1("</font></qt>"));
     }
-    emit changed(); 
+    emit changed();
   }
 }
 
@@ -92,14 +92,17 @@ void InputInt::setEnabled(bool state)
   updateDefault();
 }
 
-QVariant &InputInt::value() 
+QVariant &InputInt::value()
 {
   return m_value;
 }
 
 void InputInt::update()
 {
-  setValue(m_value.toInt());
+  bool ok;
+  int newVal = m_value.toInt(&ok);
+  if (!ok) newVal = m_default;
+  setValue(newVal);
 }
 
 void InputInt::reset()