xap_Prefs.h

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/* -*- mode: C++; tab-width: 4; c-basic-offset: 4; -*- */
/* AbiSource Application Framework
 * Copyright (C) 1998 AbiSource, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */

#ifndef XAP_PREFS_H
#define XAP_PREFS_H

/* pre-emptive dismissal; ut_types.h is needed by just about everything,
 * so even if it's commented out in-file that's still a lot of work for
 * the preprocessor to do...
 */
#ifndef UT_TYPES_H
#include "ut_types.h"
#endif
#include "ut_vector.h"
#include "ut_hash.h"
#include "ut_string.h"
#include "ut_string_class.h"
#include "ut_xml.h"

#include "xap_Prefs_SchemeIds.h"

#include <vector>

/* For handling the position of windows on the screen, this sets up preferences */
enum {
    PREF_FLAG_GEOMETRY_POS = 0x1,     // Position is valid
    PREF_FLAG_GEOMETRY_SIZE = 0x2,    // Size is valid
    PREF_FLAG_GEOMETRY_NOUPDATE = 0x4, // User specified, don't update it
    PREF_FLAG_GEOMETRY_MAXIMIZED = 0x8 // Maximize at start
};

class XAP_Prefs;

typedef void (*PrefsListener) (
    XAP_Prefs           *pPrefs,
    UT_StringPtrMap     *phChanges,
    void                *data
    );

/*****************************************************************
** XAP_PrefsScheme is a complete set of preferences.  it contains
** all the info for a UI styling set.  use XAP_Prefs to switch
** between schemes.
******************************************************************/

enum XAPPrefsLog_Level
{
    Log,
    Warning,
    Error
};

class ABI_EXPORT XAP_FontSettings
{
  public:
    XAP_FontSettings()
        :m_bInclude(false){};

    const std::vector<UT_UTF8String> & getFonts() const
        {return m_vecFonts;}

    void addFont (const char * pFace)
        {
            m_vecFonts.push_back (pFace);
        }

    bool haveFontsToExclude () const {return (!m_bInclude && m_vecFonts.size());}
    bool haveFontsToInclude () const {return (m_bInclude && m_vecFonts.size());}

    bool isOnExcludeList (const char * name) const;

    void setIncludeFlag (bool bInclude) {m_bInclude = bInclude;}
    bool getIncludeFlag () const {return m_bInclude;}

  private:
    std::vector<UT_UTF8String> m_vecFonts;
    bool m_bInclude;
};

class ABI_EXPORT XAP_PrefsScheme
{
public:
    XAP_PrefsScheme(XAP_Prefs *pPrefs, const gchar * szSchemeName);
    ~XAP_PrefsScheme(void);

    const gchar *   getSchemeName(void) const;
    bool                setSchemeName(const gchar * szNewSchemeName);
    // The idea of the tick is that some object can cache a preference
    // value if it makes a performance difference.  It should also save
    // a copy of the tick count and the scheme pointer.  If the scheme
    // pointer and the tick count are the same, the cached preference
    // value is current.  If either is changed, the object can refresh
    // its cached value.  The scheme pointer can be different because
    // the preference scheme has changed.  The tick count bumps up once
    // every time any preference value in the scheme is changed.
    UT_uint32           getTickCount() {return m_uTick;}

    bool                setValue(const gchar * szKey, const gchar * szValue);
    bool                setValueBool(const gchar * szKey, bool bValue);
    bool                setValueInt(const gchar * szKey, const int nValue);

    // the get*Value*() functions return the answer in the last
    // argument; they return error information as the function
    // return value.
    bool                getValue(const gchar * szKey, const gchar ** pszValue) const;
    bool                getValue(const UT_String &szKey, UT_String &szValue) const;
    bool                getValueInt(const gchar * szKey, int& nValue) const;
    bool                getValueBool(const gchar * szKey, bool * pbValue) const;
    bool                getNthValue(UT_uint32 k, const gchar ** pszKey, const gchar ** pszValue);

protected:
    gchar *         m_szName;
    UT_GenericStringMap<gchar*> m_hash;
    UT_GenericVector<const gchar*> m_sortedKeys;
    bool                m_bValidSortedKeys;
    XAP_Prefs *         m_pPrefs;
    UT_uint32           m_uTick;   // ticks up every time setValue() or setValueBool() is called
};

/*****************************************************************/
/*****************************************************************/

class ABI_EXPORT XAP_Prefs : public UT_XML::Listener
{
public:
    XAP_Prefs();
    virtual ~XAP_Prefs(void);

    bool                    loadPrefsFile(void);
    bool                    loadSystemDefaultPrefsFile(const char * szSystemDefaultPrefsPathname);
    bool                    savePrefsFile(void);

    XAP_PrefsScheme *       getNthScheme(UT_uint32 k) const;
    XAP_PrefsScheme *       getNthPluginScheme(UT_uint32 k) const;
    XAP_PrefsScheme *       getScheme(const gchar * szSchemeName) const;
    XAP_PrefsScheme *       getPluginScheme(const gchar * szSchemeName) const;
    bool                    addScheme(XAP_PrefsScheme * pNewScheme);
    bool                    addPluginScheme(XAP_PrefsScheme * pNewScheme);
    XAP_PrefsScheme *       getCurrentScheme(bool bCreate = false);
    bool                    setCurrentScheme(const gchar * szSchemeName);

    bool                    getPrefsValue(const gchar * szKey, const gchar ** pszValue, bool bAllowBuiltin = true) const;
    bool                    getPrefsValue(const UT_String &stKey, UT_String &stValue, bool bAllowBuiltin = true) const;
    bool                    getPrefsValueBool(const gchar * szKey, bool * pbValue, bool bAllowBuiltin = true) const;
    bool                    getPrefsValueInt(const gchar * szKey, int& nValue, bool bAllowBuiltin = true) const;

    bool                    getAutoSavePrefs(void) const;
    void                    setAutoSavePrefs(bool bAuto);

    bool                    getUseEnvLocale(void) const;
    void                    setUseEnvLocale(bool bUse);

    UT_sint32               getMaxRecent(void) const;
    void                    setMaxRecent(UT_sint32 k);
    UT_sint32               getRecentCount(void) const;
    const char *            getRecent(UT_sint32 k) const;       // one-based
    void                    addRecent(const char * szRecent);
    void                    removeRecent(UT_sint32 k);          // one-based
    void                    setIgnoreNextRecent(void)
        { m_bIgnoreThisOne = true;}
    bool                    isIgnoreRecent(void)
    { return m_bIgnoreThisOne;}

    bool                    setGeometry(UT_sint32 posx, UT_sint32 posy, UT_uint32 width, UT_uint32 height, UT_uint32 flags = 0);
    bool                    getGeometry(UT_sint32 *posx, UT_sint32 *posy, UT_uint32 *width, UT_uint32 *height, UT_uint32 *flags = 0);

    virtual void            fullInit(void) = 0;
    virtual bool            loadBuiltinPrefs(void) = 0;
    virtual const gchar *   getBuiltinSchemeName(void) const = 0;
    virtual const char *    getPrefsPathname(void) const = 0;

    void                    addListener   ( PrefsListener pFunc, void *data );
    void                    removeListener ( PrefsListener pFunc, void *data = 0 );
    void                    startBlockChange();
    void                    endBlockChange();

    void                    log(const char * where, const char * what, XAPPrefsLog_Level level = Log);

    XAP_FontSettings &      getFontSettings () {return m_fonts;}

    // a only-to-be-used-by XAP_PrefsScheme::setValue
    void                    _markPrefChange ( const gchar *szKey );
protected:
    void                    _pruneRecent(void);
    XAP_PrefsScheme *       _getNthScheme(UT_uint32 k,
                                          const UT_GenericVector<XAP_PrefsScheme *> &vecSchemes) const;

    bool                    m_bAutoSavePrefs; /* save on any changes or only when user asks */
    bool                    m_bUseEnvLocale; /* use POSIX env vars to set locale */

    UT_GenericVector<XAP_PrefsScheme *> m_vecSchemes;       /* vector of XAP_PrefsScheme */
    UT_GenericVector<XAP_PrefsScheme *> m_vecPluginSchemes; /* vector of XAP_PrefsScheme */
    XAP_PrefsScheme *       m_currentScheme;
    XAP_PrefsScheme *       m_builtinScheme;

    UT_sint32               m_iMaxRecent;
    UT_GenericVector<char*> m_vecRecent;        /* vector of (char *) */
    UT_GenericVector<UT_UTF8String *> m_vecLog; /* vector of UT_UTF8String */

    XAP_FontSettings        m_fonts;

    typedef struct                  /* used to store the listener/data pairs in the vector  */
    {
        PrefsListener   m_pFunc;
        void            *m_pData;
    } tPrefsListenersPair;

    UT_GenericVector<tPrefsListenersPair *> m_vecPrefsListeners;    /* vectory of struct PrefListnersPair */
    UT_StringPtrMap     m_ahashChanges;
    bool                m_bInChangeBlock;
    void                _sendPrefsSignal( UT_StringPtrMap *hash );

    typedef struct {
        UT_uint32       m_width, m_height;  /* Default width and height */
        UT_sint32       m_posx, m_posy;     /* Default position */
        UT_uint32       m_flags;            /* What is valid, what is not */
    } Pref_Geometry;

    Pref_Geometry       m_geom;


    /* Implementation of UT_XML::Listener */
public:
    void                startElement(const gchar *name, const gchar **atts);
    void                endElement(const gchar *name);
    void                charData(const gchar *s, int len);
private:
    void                _startElement_SystemDefaultFile(const gchar *name,
                                                        const gchar **atts);
    bool                m_bLoadSystemDefaultFile;
    bool                m_bIgnoreThisOne;
private:
    struct
    {
        bool            m_parserStatus;
        bool            m_bFoundAbiPreferences;
        bool            m_bFoundSelect;
        gchar *         m_szSelectedSchemeName;
        bool            m_bFoundRecent;
        bool            m_bFoundGeometry;
        bool            m_bFoundFonts;
    } m_parserState;

};

// The following are the default values and limits for various non-scheme-based
// application-independent preferences.

#define XAP_PREF_DEFAULT_AutoSavePrefs      "1"
#define XAP_PREF_DEFAULT_MaxRecent          "9"
#define XAP_PREF_DEFAULT_UseEnvLocale       "1"

#define XAP_PREF_LIMIT_MaxRecent            9

#endif /* XAP_PREFS_H */