source: cpp/frams/param/param.h @ 215

// This file is a part of the Framsticks GDK.
// Copyright (C) 1999-2014  Maciej Komosinski and Szymon Ulatowski.  See LICENSE.txt for details.
// Refer to http://www.framsticks.com/ for further information.

#ifndef _PARAM_H_
#define _PARAM_H_

#include <stdio.h>
#include <frams/util/sstring.h>
#include <frams/util/list.h>
#include <frams/util/statrick.h>
#include <frams/virtfile/virtfile.h>
#include <common/framsg.h>

class ExtValue;
class ExtObject;

// ParamInterface flags:
#define PARAM_READONLY  1
#define PARAM_DONTSAVE  2
#define PARAM_SETLEVEL(x) (((x)&3)<<2)
#define PARAM_LEVEL(x) (((x)>>2)&3)
#define PARAM_USERREADONLY 16
#define PARAM_USERHIDDEN 32
// for mutableparam (private!)
#define MUTPARAM_ALLOCENTRY 64
#define MUTPARAM_ALLOCDATA 128
#define PARAM_NOSTATIC 256
#define PARAM_CONST 512
#define PARAM_CANOMITNAME 1024
#define PARAM_DONTLOAD  2048
#define PARAM_NOISOLATION       4096
#define PARAM_DEPRECATED        8192

// the result of param::set() is a combination of bits:

// read-only: cannot modify
#define PSET_RONLY      1

// value has been modified
#define PSET_CHANGED    2

//value has been adjusted because it tried to exceed min or max
#define PSET_HITMIN     4
#define PSET_HITMAX     8

// useful combination: need to get and display the value so that a user knows that the value they tried to set has been rejected or changed
#define PSET_WARN (PSET_RONLY | PSET_HITMIN | PSET_HITMAX)

#define PSET_NOPROPERTY 16

struct ParamEntry;

/** Property get/set interface - runtime access to named properties */
class ParamInterface
{
public:
        virtual int getGroupCount() = 0; ///< @return the number of property groups
        virtual int getPropCount() = 0; ///< @return the number of properties

        virtual const char* getName() = 0;
        virtual const char* getDescription() { return 0; }
        virtual ParamEntry *getParamTab() const { return NULL; }

        int findId(const char *n);      ///< find id number for internal name
        int findIdn(const char *naz, int n);

        virtual const char *id(int i) = 0;      ///< get internal name
        virtual const char *name(int i) = 0;    ///< get the human-readable name

        /** get type description.
                first character defines basic datatype:
                - d = integer
                - f = floating point
                - s = string
                - o = ExtObject
                - x = ExtValue (universal datatype)
                */
        virtual const char *type(int i) = 0;

        virtual const char *help(int i) = 0;    ///< get long description (tooltip)

        virtual int flags(int i) = 0;           ///< get flags

        virtual int group(int i) = 0;           ///< get group id for a property
        virtual const char *grname(int gi) = 0; ///< get group name
        virtual int grmember(int gi, int n) = 0;        ///< get property id for n'th member of group "gi"

        virtual void call(int i, ExtValue* args, ExtValue *ret) = 0;

        void get(int, ExtValue &retval);        ///< most universal get, can be used for every datatype

        virtual SString getString(int) = 0;     ///< get string value, you can only use this for "s" type property
        virtual long getInt(int) = 0;   ///< get long value, you can only use this for "d" type property
        virtual double getDouble(int) = 0;      ///< get double value, you can only use this for "f" type property
        virtual ExtObject getObject(int) = 0;   ///< get object reference, you can only use this for "o" type property
        virtual ExtValue getExtValue(int) = 0;  ///< get extvalue object, you can only use this for "x" type property

        SString get(int);               ///< old style get, can convert long or double to string
        SString getText(int);           ///< like getString, returns enumeration label for subtype "d 0 n ~enum1~enum2...

        SString getStringById(const char*prop);  ///< get string value, you can only use this for "s" type property
        long getIntById(const char* prop);    ///< get long value, you can only use this for "d" type property
        double getDoubleById(const char* prop);///< get double value, you can only use this for "f" type property
        ExtObject getObjectById(const char* prop);///< get object reference, you can only use this for "o" type property
        ExtValue getExtValueById(const char* prop);///< get extvalue object, you can only use this for "x" type property
        ExtValue getById(const char* prop);

        int setInt(int i, const char* str);
        int setDouble(int i, const char* str);
        virtual int setInt(int, long) = 0;              ///< set long value, you can only use this for "d" type prop
        virtual int setDouble(int, double) = 0; ///< set double value, you can only use this for "f" type prop
        virtual int setString(int, const SString &) = 0;        ///< set string value, you can only use this for "s" type prop
        virtual int setObject(int, const ExtObject &) = 0;      ///< set object reference, you can only use this for "o" type prop
        virtual int setExtValue(int, const ExtValue &) = 0;     ///< 4 in 1

        int set(int, const ExtValue &);///< most universal set, can be used for every datatype

        int set(int, const char*);              ///< oldstyle set, can convert string to long or double

        int setIntById(const char* prop, long);///< set long value, you can only use this for "d" type prop
        int setDoubleById(const char* prop, double);///< set double value, you can only use this for "f" type prop
        int setStringById(const char* prop, const SString &);///< set string value, you can only use this for "s" type prop
        int setObjectById(const char* prop, const ExtObject &);///< set object reference, you can only use this for "o" type prop
        int setExtValueById(const char* prop, const ExtValue &); ///< for ExtValue types only
        int setById(const char* prop, const ExtValue &);///< can be used for all property types

        /** get valid minimum, maximum and default value for property 'prop'
                @return 0 if min/max/def information is not available */
        int getMinMax(int prop, long& minumum, long& maximum, long& def);
        /** get valid minimum, maximum and default value for property 'prop'
                @return 0 if min/max/def information is not available */
        int getMinMax(int prop, double& minumum, double& maximum, double& def);

        virtual void setDefault(bool numericonly = false);
        virtual void setDefault(int i, bool numericonly = false);
        void setMin();
        void setMax();
        void setMin(int i);
        void setMax(int i);

        /** copy all property values from other ParamInterface object */
        void copyFrom(ParamInterface *src);

        /** Copy all property values from compatible ParamInterface object.
                This method is more efficient than copyFrom,
                but can be used only if the other object has the same properties sequence, e.g.:
                - any two Param objects having common paramtab
                - any ParamInterface object and the Param with paramtab constructed by ParamObject::makeParamTab
                */
        void quickCopyFrom(ParamInterface *src);

        int save(VirtFILE*, const char* altname = NULL, bool force = 0);
        int saveprop(VirtFILE*, int i, const char* p, bool force = 0);
        int load(VirtFILE*);///< @return the number of fields loaded
        int load2(const SString &, int &);///< @return the number of fields loaded

        static const char* SERIALIZATION_PREFIX;
};

// implementations:

extern char MakeCodeGuardHappy;

#define PROCOFFSET(_proc_) ( (void (*)(void*,ExtValue*,ExtValue*)) &(FIELDSTRUCT :: _proc_ ## _statrick))
#define STATICPROCOFFSET(_proc_) ( (void (*)(void*,ExtValue*,ExtValue*)) &(FIELDSTRUCT :: _proc_))
#define GETOFFSET(_proc_) ( (void (*)(void*,ExtValue*)) &(FIELDSTRUCT :: _proc_ ## _statrick))
#define SETOFFSET(_proc_) ( (int (*)(void*,const ExtValue*)) &(FIELDSTRUCT :: _proc_ ## _statrick))

#define FIELDOFFSET(_fld_) ((long)((char*)(&((FIELDSTRUCT*)&MakeCodeGuardHappy)->_fld_)-((char*)((FIELDSTRUCT*)&MakeCodeGuardHappy))))

#define FIELD(_fld_) FIELDOFFSET(_fld_),0,0
#define LONGOFFSET(_o_) (_o_),0,0
#define PROCEDURE(_proc_) 0,(void*)PROCOFFSET(_proc_),0
#define STATICPROCEDURE(_proc_) 0,(void*)STATICPROCOFFSET(_proc_),0
#define GETSET(_proc_) 0,(void*)GETOFFSET(get_ ## _proc_),(void*)SETOFFSET(set_ ## _proc_)
#define GETFIELD(_proc_) FIELDOFFSET(_proc_),(void*)GETOFFSET(get_ ## _proc_),0
#define SETFIELD(_proc_) FIELDOFFSET(_proc_),0,(void*)SETOFFSET(set_ ## _proc_)
#define GETONLY(_proc_) 0,(void*)GETOFFSET(get_ ## _proc_),0
#define SETONLY(_proc_) 0,0,(void*)SETOFFSET(set_ ## _proc_)

#define PARAMPROCARGS ExtValue* args,ExtValue* ret
#define PARAMSETARGS const ExtValue* arg
#define PARAMGETARGS ExtValue* ret

#define PARAMPROCDEF(name) STATRICKDEF2(name,ExtValue*,ExtValue*)
#define PARAMGETDEF(name) STATRICKDEF1(get_ ## name,ExtValue*)
#define PARAMSETDEF(name) STATRICKRDEF1(int,set_ ## name,const ExtValue*)

///////////////////////////////

struct ParamEntry
{
        const char *id;
        short group, flags;
        const char *name, *type;
        long offset;
        void *fun1; ///< procedure or get
        void *fun2; ///< set
        const char *help;
};

struct ParamEntryConstructor : public ParamEntry
{
public:
        ParamEntryConstructor(const char *_id, short _group = 0, short _flags = 0, const char *_name = 0, const char *_type = 0, long _offset = 0, void *_fun1 = 0, void *_fun2 = 0, const char *_help = 0)
        {
                id = _id; group = _group; flags = _flags; name = _name; type = _type; offset = _offset; fun1 = _fun1; fun2 = _fun2; help = _help;
        }
};

class SimpleAbstractParam : public virtual ParamInterface
{
protected:
        virtual void *getTarget(int i);
        virtual ParamEntry *entry(int i) = 0;
        const char* myname;
        bool dontcheckchanges;

public:
        void *object;

        const char* getName() { return myname; }
        void setName(const char* n) { myname = n; }

        /**
                @param t ParamEntry table
                @param o controlled object
                @param n Param's name
                */
        SimpleAbstractParam(void* o = 0, const char*n = 0) :myname(n), dontcheckchanges(0), object(o) {}
        void setDontCheckChanges(bool x) { dontcheckchanges = x; }

        void select(void *o) { object = o; }
        void* getSelected() { return object; }

        const char *id(int i) { return (i >= getPropCount()) ? 0 : entry(i)->id; }
        const char *name(int i) { return entry(i)->name; }
        const char *type(int i) { return entry(i)->type; }
        const char *help(int i) { return entry(i)->help; }
        int flags(int i) { return entry(i)->flags; }
        int group(int i) { return entry(i)->group; }
        void call(int i, ExtValue* args, ExtValue *ret);

        SString getString(int);
        long getInt(int);
        double getDouble(int);
        ExtObject getObject(int);
        ExtValue getExtValue(int);

        template<typename T> void messageOnExceedRange(int i, int setflags, T valuetoset) ///< prints a warning when setflags indicates that allowed param range has been exceeded during set
        {
                if (setflags & (PSET_HITMIN | PSET_HITMAX))
                {
                        SString svaluetoset = SString::valueOf(valuetoset); //converts any type to SString
                        SString actual = get(i);
                        FMprintf("Param", "set", FMLV_WARN, "Setting '%s.%s = %s' exceeded allowed range (too %s). Adjusted to %s.",
                                getName(), id(i), (const char*)svaluetoset, (setflags&PSET_HITMAX) ? "big" : "small", (const char*)actual);
                }
        }

        int setInt(int, long);
        int setDouble(int, double);
        int setString(int, const SString &);
        int setObject(int, const ExtObject &);
        int setExtValue(int, const ExtValue &);

        int isequal(int i, void* defdata);
        void save2(SString&, void *defdata, bool addcr = true, bool all_names = true);

        virtual void setDefault(bool numericonly = false);
        virtual void setDefault(int i, bool numericonly = false);
};

class Param : public SimpleAbstractParam
{
protected:
        ParamEntry *entry(int i) { return tab + tab[0].group + i; }
public:
        ParamEntry *tab;
        /**
                @param t ParamEntry table
                @param o controlled object
                @param n Param's name
                */

        Param(ParamEntry *t = 0, void* o = 0, const char*n = 0) :SimpleAbstractParam(o, n), tab(t)
        {
                if (!n&&tab) myname = tab[0].name;
        }

        Param(const Param& p) :SimpleAbstractParam(p.object, p.myname), tab(p.tab) {}
        void operator=(const Param&p) { object = p.object; myname = p.myname; tab = p.tab; }

        const char* getDescription() { return tab[0].type; }

        int getGroupCount() { return tab[0].group; }
        int getPropCount() { return tab[0].flags; }
        const char *grname(int i) { return (i < getGroupCount()) ? tab[i].id : 0; }
        int grmember(int, int);
        void setParamTab(ParamEntry *t, int dontupdatename = 0) { tab = t; if ((!dontupdatename) && tab) myname = tab[0].name; }
        ParamEntry *getParamTab() const { return tab; }
};

extern ParamEntry empty_paramtab[];

#endif