config.h

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#ifndef CONFIG_H
#define CONFIG_H

#include "qtbc.h"
#include <qstrlist.h>
#include <qfile.h>
#include <qdict.h>
#include <qlist.h>
#include <qtextstream.h>

class ConfigOption
{
    friend class Config;

  public:

    enum OptionType 
    { 
      O_Info,      //<! A section header
      O_List,      //<! A list of items
      O_Enum,      //<! A fixed set of items
      O_String,    //<! A single item
      O_Int,       //<! An integer value
      O_Bool,      //<! A boolean value
      O_Obsolete   //<! An obsolete option
    };
    enum 
    { 
      MAX_OPTION_LENGTH = 23  
    };
    ConfigOption(OptionType t) : m_kind(t) 
    {
      m_spaces.fill(' ',40);
    }
    virtual ~ConfigOption()
    {
    }

    OptionType kind() const { return m_kind; }
    QCString name() const { return m_name; }
    QCString docs() const { return m_doc; }

    QCString dependsOn() const { return m_dependency; }
    void addDependency(const char *dep) { m_dependency = dep; }
    void setEncoding(const QCString &e) { m_encoding = e; }

  protected:
    virtual void writeTemplate(QTextStream &t,bool sl,bool upd) = 0;
    virtual void convertStrToVal() {}
    virtual void substEnvVars() = 0;
    virtual void init() {}

    QCString convertToComment(const QCString &s);
    void writeBoolValue(QTextStream &t,bool v);
    void writeIntValue(QTextStream &t,int i);
    void writeStringValue(QTextStream &t,QCString &s);
    void writeStringList(QTextStream &t,QStrList &l);

    QCString m_spaces;
    QCString m_name;
    QCString m_doc;
    QCString m_dependency;
    QCString m_encoding;
    OptionType m_kind;
};

class ConfigInfo : public ConfigOption
{
  public:
    ConfigInfo(const char *name,const char *doc) 
      : ConfigOption(O_Info)
    {
      m_name = name;
      m_doc = doc;
    }
    void writeTemplate(QTextStream &t, bool sl,bool)
    {
      if (!sl)
      {
        t << "\n";
      }
      t << "#---------------------------------------------------------------------------\n";
      t << "# " << m_doc << endl;
      t << "#---------------------------------------------------------------------------\n";
    }
    void substEnvVars() {}
};

class ConfigList : public ConfigOption
{
  public:
    enum WidgetType { String, File, Dir, FileAndDir };
    ConfigList(const char *name,const char *doc) 
      : ConfigOption(O_List)
    {
      m_name = name;
      m_doc = doc;
      m_widgetType = String;
    }
    void addValue(const char *v) { m_value.append(v); }
    void setWidgetType(WidgetType w) { m_widgetType = w; }
    WidgetType widgetType() const { return m_widgetType; }
    QStrList *valueRef() { return &m_value; }
    void writeTemplate(QTextStream &t,bool sl,bool)
    {
      if (!sl)
      {
        t << endl;
        t << convertToComment(m_doc);
        t << endl;
      }
      t << m_name << m_spaces.left(MAX_OPTION_LENGTH-m_name.length()) << "= ";
      writeStringList(t,m_value);
      t << "\n";
    }
    void substEnvVars();
    void init() { m_value.clear(); }
  private:
    QStrList m_value;
    WidgetType m_widgetType;
};

class ConfigEnum : public ConfigOption
{
  public:
    ConfigEnum(const char *name,const char *doc,const char *defVal) 
      : ConfigOption(O_Enum)
    {
      m_name = name;
      m_doc = doc;
      m_value = defVal;
      m_defValue = defVal;
    }
    void addValue(const char *v) { m_valueRange.append(v); }
    QStrListIterator iterator() 
    {
      return QStrListIterator(m_valueRange);
    }
    QCString *valueRef() { return &m_value; }
    void substEnvVars();
    void writeTemplate(QTextStream &t,bool sl,bool)
    {
      if (!sl)
      {
        t << endl;
        t << convertToComment(m_doc);
        t << endl;
      }
      t << m_name << m_spaces.left(MAX_OPTION_LENGTH-m_name.length()) << "= ";
      writeStringValue(t,m_value);
      t << "\n";
    }
    void init() { m_value = m_defValue.copy(); }

  private:
    QStrList m_valueRange;
    QCString m_value;
    QCString m_defValue;
};

class ConfigString : public ConfigOption
{
  public:
    enum WidgetType { String, File, Dir };
    ConfigString(const char *name,const char *doc) 
      : ConfigOption(O_String)
    {
      m_name = name;
      m_doc = doc;
      m_widgetType = String;
    }
   ~ConfigString()
    {
    }
    void setWidgetType(WidgetType w) { m_widgetType = w; }
    WidgetType widgetType() const { return m_widgetType; }
    void setDefaultValue(const char *v) { m_defValue = v; }
    QCString *valueRef() { return &m_value; }
    void writeTemplate(QTextStream &t,bool sl,bool)
    {
      if (!sl)
      {
        t << endl;
        t << convertToComment(m_doc);
        t << endl;
      }
      t << m_name << m_spaces.left(MAX_OPTION_LENGTH-m_name.length()) << "= ";
      writeStringValue(t,m_value);
      t << "\n";
    }
    void substEnvVars();
    void init() { m_value = m_defValue.copy(); }
  
  private:
    QCString m_value;
    QCString m_defValue;
    WidgetType m_widgetType;
};

class ConfigInt : public ConfigOption
{
  public:
    ConfigInt(const char *name,const char *doc,int minVal,int maxVal,int defVal) 
      : ConfigOption(O_Int)
    {
      m_name = name;
      m_doc = doc;
      m_value = defVal;
      m_defValue = defVal;
      m_minVal = minVal;
      m_maxVal = maxVal;
    }
    QCString *valueStringRef() { return &m_valueString; }
    int *valueRef() { return &m_value; }
    int minVal() const { return m_minVal; }
    int maxVal() const { return m_maxVal; }
    void convertStrToVal();
    void substEnvVars();
    void writeTemplate(QTextStream &t,bool sl,bool upd)
    {
      if (!sl)
      {
        t << endl;
        t << convertToComment(m_doc);
        t << endl;
      }
      t << m_name << m_spaces.left(MAX_OPTION_LENGTH-m_name.length()) << "= ";
      if (upd && !m_valueString.isEmpty())
      {
        writeStringValue(t,m_valueString);
      }
      else
      {
        writeIntValue(t,m_value);
      }
      t << "\n";
    }
    void init() { m_value = m_defValue; }
  private:
    int m_value;
    int m_defValue;
    int m_minVal;
    int m_maxVal;
    QCString m_valueString;
};

class ConfigBool : public ConfigOption
{
  public:
    ConfigBool(const char *name,const char *doc,bool defVal) 
      : ConfigOption(O_Bool)
    {
      m_name = name;
      m_doc = doc;
      m_value = defVal;
      m_defValue = defVal;
    }
    QCString *valueStringRef() { return &m_valueString; }
    bool *valueRef() { return &m_value; }
    void convertStrToVal();
    void substEnvVars();
    void setValueString(const QCString &v) { m_valueString = v; }
    void writeTemplate(QTextStream &t,bool sl,bool upd)
    {
      if (!sl)
      {
        t << endl;
        t << convertToComment(m_doc);
        t << endl;
      }
      t << m_name << m_spaces.left(MAX_OPTION_LENGTH-m_name.length()) << "= ";
      if (upd && !m_valueString.isEmpty())
      {
        writeStringValue(t,m_valueString);
      }
      else
      {
        writeBoolValue(t,m_value);
      }
      t << "\n";
    }
    void init() { m_value = m_defValue; }
  private:
    bool m_value;
    bool m_defValue;
    QCString m_valueString;
};

class ConfigObsolete : public ConfigOption
{
  public:
    ConfigObsolete(OptionType t) : ConfigOption(t)  {}
    void writeTemplate(QTextStream &,bool,bool) {}
    void substEnvVars() {}
};


// some convenience macros
#define Config_getString(val)  Config::instance()->getString(__FILE__,__LINE__,val)
#define Config_getInt(val)     Config::instance()->getInt(__FILE__,__LINE__,val)
#define Config_getList(val)    Config::instance()->getList(__FILE__,__LINE__,val)
#define Config_getEnum(val)    Config::instance()->getEnum(__FILE__,__LINE__,val)
#define Config_getBool(val)    Config::instance()->getBool(__FILE__,__LINE__,val)

class Config
{
  public:
    // public API

    static Config *instance()
    {
      if (m_instance==0) m_instance = new Config;
      return m_instance;
    }
    static void deleteInstance()
    {
      delete m_instance;
      m_instance=0;
    }
    
    QListIterator<ConfigOption> iterator()
    {
      return QListIterator<ConfigOption>(*m_options);
    }

    QCString &getString(const char *fileName,int num,const char *name) const;

    QStrList &getList(const char *fileName,int num,const char *name) const;

    QCString &getEnum(const char *fileName,int num,const char *name) const;

    int      &getInt(const char *fileName,int num,const char *name) const;

    bool     &getBool(const char *fileName,int num,const char *name) const;

    ConfigOption *get(const char *name) const
    {
      return m_dict->find(name); 
    }
    /* @} */

    ConfigInfo   *addInfo(const char *name,const char *doc)
    {
      ConfigInfo *result = new ConfigInfo(name,doc);
      m_options->append(result);
      return result;
    }

    ConfigString *addString(const char *name,
                            const char *doc)
    {
      ConfigString *result = new ConfigString(name,doc);
      m_options->append(result);
      m_dict->insert(name,result);
      return result;
    }

    ConfigEnum   *addEnum(const char *name,
                          const char *doc,
                          const char *defVal)
    {
      ConfigEnum *result = new ConfigEnum(name,doc,defVal);
      m_options->append(result);
      m_dict->insert(name,result);
      return result;
    }

    ConfigList   *addList(const char *name,
                          const char *doc)
    {
      ConfigList *result = new ConfigList(name,doc);
      m_options->append(result);
      m_dict->insert(name,result);
      return result;
    }

    ConfigInt    *addInt(const char *name,
                         const char *doc,
                         int minVal,int maxVal,int defVal)
    {
      ConfigInt *result = new ConfigInt(name,doc,minVal,maxVal,defVal);
      m_options->append(result);
      m_dict->insert(name,result);
      return result;
    }

    ConfigBool   *addBool(const char *name,
                          const char *doc,
                          bool defVal)
    {
      ConfigBool *result = new ConfigBool(name,doc,defVal);
      m_options->append(result);
      m_dict->insert(name,result);
      return result;
    }
    ConfigOption *addObsolete(const char *name)
    {
      ConfigObsolete *option = new ConfigObsolete(ConfigOption::O_Obsolete);
      m_dict->insert(name,option);
      m_obsolete->append(option);
      return option;
    }
    void writeTemplate(QTextStream &t,bool shortIndex,bool updateOnly);

    // internal API

    void convertStrToVal();

    void substituteEnvironmentVars();

    void check();

    void init();

    bool parseString(const char *fn,const char *str);

    bool parse(const char *fn);

    void create();

  protected:

    Config()
    { 
      m_options  = new QList<ConfigOption>;
      m_obsolete = new QList<ConfigOption>;
      m_dict     = new QDict<ConfigOption>(257);
      m_options->setAutoDelete(TRUE);
      m_obsolete->setAutoDelete(TRUE);
      m_initialized = FALSE;
      create();
    }
   ~Config()
    {
      delete m_options;
      delete m_obsolete;
      delete m_dict;
    }

  private:
    QList<ConfigOption> *m_options;
    QList<ConfigOption> *m_obsolete;
    QDict<ConfigOption> *m_dict;
    static Config *m_instance;
    bool m_initialized;
};

#endif

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