PRM_SpareData.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * NAME:        PRM_SpareData.h ( PRM Library, C++)
 *
 * COMMENTS:    This class is used to add additional token/value pairs to a
 *              parameter.
 */

#ifndef __PRM_SpareData__
#define __PRM_SpareData__

#include "PRM_API.h"
#include "PRM_Type.h"

#include <CH/CH_ExprLanguage.h>
#include <UT/UT_ArrayStringMap.h>
#include <UT/UT_Color.h>
#include <UT/UT_Variadic.h>

#include <SYS/SYS_Types.h>

#include <utility>


// Namespace to use for built-in parameter tags.
// Note that we cannot add the namespace to old built-in tags
// for compatibility reasons.
#define PRM_SPARE_BUILTIN_NAMESPACE "sidefx::"

//
// Declarations of built-in parm spare data tokens (tag names).
// The entries in this list must be included in `theBuiltInTokenMap` 
// (see PRM_SpareData.C).
//
// NOTE: You *must* include the SideFX namespace in the token
//       when adding a new spare data token.
//
#define PRM_SPARE_KEY_VALUE_DICT_KEY_LABEL_TOKEN \
    PRM_SPARE_BUILTIN_NAMESPACE "key_value_dict_key_label"
#define PRM_SPARE_KEY_VALUE_DICT_VALUE_LABEL_TOKEN \
    PRM_SPARE_BUILTIN_NAMESPACE "key_value_dict_value_label"
#define PRM_SPARE_KEY_VALUE_DICT_USE_CHOOSER_TOKEN \
    PRM_SPARE_BUILTIN_NAMESPACE "key_value_dict_use_chooser"
#define PRM_SPARE_KEY_VALUE_DICT_CHOOSER_LABEL_TOKEN \
    PRM_SPARE_BUILTIN_NAMESPACE "key_value_dict_chooser_label"
#define PRM_SPARE_KEY_VALUE_DICT_CHOOSER_CALLBACK_TOKEN \
    PRM_SPARE_BUILTIN_NAMESPACE "key_value_dict_chooser_callback"
#define PRM_SPARE_ATTRIB_ACCESS_TOKEN \
    PRM_SPARE_BUILTIN_NAMESPACE "attrib_access"
#define PRM_SPARE_CONNECTOR_KIND \
    PRM_SPARE_BUILTIN_NAMESPACE "connector_kind"
#define PRM_SPARE_CONNECTOR_TYPE \
    PRM_SPARE_BUILTIN_NAMESPACE "connector_type"
#define PRM_SPARE_USDPATHTYPE_TOKEN \
    PRM_SPARE_BUILTIN_NAMESPACE "usdpathtype"
#define PRM_SPARE_USDPATHINPUT_TOKEN \
    PRM_SPARE_BUILTIN_NAMESPACE "usdpathinput"
#define PRM_SPARE_IS_SHADER_PARM_TOKEN \
    PRM_SPARE_BUILTIN_NAMESPACE "shader_isparm"
#define PRM_SPARE_FORCE_SHADER_PARM_VAL_TOKEN \
    PRM_SPARE_BUILTIN_NAMESPACE "shader_forceparmval"
#define PRM_SPARE_SHADER_PARM_TYPE_TOKEN \
    PRM_SPARE_BUILTIN_NAMESPACE "shader_parmtype"
#define PRM_SPARE_SHADER_PARM_NAME_TOKEN \
    PRM_SPARE_BUILTIN_NAMESPACE "shader_parmname"
#define PRM_SPARE_SAVE_VALUE_TOKEN \
    PRM_SPARE_BUILTIN_NAMESPACE "save_value"
#define PRM_SPARE_MAYA_COMPONENT_SELECTION_TYPE_TOKEN \
    PRM_SPARE_BUILTIN_NAMESPACE "maya_component_selection_type"

//
// Declarations of *old*, built-in parm spare data tokens (tag names).
// WARNING: Do not add new spare data tokens to this list!!!
//          Add the tokens to the new list above and include the SideFX
//          namespace in the tokens.
// 
#define PRM_SPARE_AUTOSCOPE_TOKEN                   "autoscope"
#define PRM_SPARE_BUTTON_ICON_TOKEN                 "button_icon"
#define PRM_SPARE_CODE_GENERATION_TOKEN             "code_generation"
#define PRM_SPARE_COLOR_DYN_TOKEN                   "colordyn"
#define PRM_SPARE_COLOR_TYPE_TOKEN                  "colortype"
#define PRM_SPARE_COLOR_WHEEL_TOKEN                 "colorwheel"
#define PRM_SPARE_COOK_DEPENDENT_TOKEN              "cook_dependent"
#define PRM_SPARE_EDITOR_LANG_TOKEN                 "editorlang"
#define PRM_SPARE_EDITOR_LINES_TOKEN                "editorlines"
#define PRM_SPARE_EDITOR_TOKEN                      "editor"
#define PRM_SPARE_FILE_CHOOSER_MODE_TOKEN           "filechooser_mode"
#define PRM_SPARE_FILE_CHOOSER_PATTERN_TOKEN        "filechooser_pattern"
#define PRM_SPARE_GROUP_TYPE_TOKEN                  "group_type"
#define PRM_SPARE_GROUP_DEFAULT_TOKEN               "group_default"
#define PRM_SPARE_MULTI_START_OFFSET_TOKEN          "multistartoffset"
#define PRM_SPARE_NETREF_TOKEN                      "netref"
#define PRM_SPARE_OPFILTER_TOKEN                    "opfilter"
#define PRM_SPARE_OPPATH_KEYWORDS_TOKEN             "oppathkeywords"
#define PRM_SPARE_OPRELATIVE_TOKEN                  "oprelative"
#define PRM_SPARE_PARM_VOP_TOKEN                    "parmvop"
#define PRM_SPARE_RAMP_BASIS_DEFAULT_TOKEN          "rampbasisdefault"
#define PRM_SPARE_RAMP_BASIS_TOKEN                  "rampbasis"
#define PRM_SPARE_RAMP_BASIS_VAR_TOKEN              "rampbasis_var"
#define PRM_SPARE_RAMP_COLOR_DEFAULT_TOKEN          "rampcolordefault"
#define PRM_SPARE_RAMP_COLOR_TYPE_TOKEN             "rampcolortype"
#define PRM_SPARE_RAMP_FLOAT_DEFAULT_TOKEN          "rampfloatdefault"
#define PRM_SPARE_RAMP_KEYS_TOKEN                   "rampkeys"
#define PRM_SPARE_RAMP_KEYS_VAR_TOKEN               "rampkeys_var"
#define PRM_SPARE_RAMP_SHOW_CONTROLS_DEFAULT_TOKEN  "rampshowcontrolsdefault"
#define PRM_SPARE_RAMP_VALUES_TOKEN                 "rampvalues"
#define PRM_SPARE_RAMP_VALUES_VAR_TOKEN             "rampvalues_var"
#define PRM_SPARE_SCRIPT_ACTION_HELP_TOKEN          "script_action_help"
#define PRM_SPARE_SCRIPT_ACTION_ICON_TOKEN          "script_action_icon"
#define PRM_SPARE_SCRIPT_ACTION_TOKEN               "script_action"
#define PRM_SPARE_SCRIPT_CALLBACK_TOKEN             "script_callback"
#define PRM_SPARE_SCRIPT_CALLBACK_LANGUAGE_TOKEN    "script_callback_language"
#define PRM_SPARE_SCRIPT_RITYPE_TOKEN               "script_ritype"
#define PRM_SPARE_SCRIPT_UNQUOTED_TOKEN             "script_unquoted"
#define PRM_SPARE_SHADER_PARM_CONTEXTS_TOKEN        "shaderparmcontexts"
#define PRM_SPARE_UNITS_TOKEN                       "units"
#define PRM_SPARE_XCF_MODE_TOKEN                    "xcfmode"
#define PRM_SPARE_VARYING_DEFAULT_TOKEN             "varying_default"

class UT_BitArray;
class UT_StringArray;
class UT_StringHolder;
class UT_StringRef;
class PRM_Parm;
class prm_SharedString;

typedef int     (*PRM_SpareCallback)(const char *token, const char *value);
typedef int     (*PRM_SpareCallbackWithData)(const char *token, 
                                             const char *value, void *data);

typedef std::pair<const char *, const char *>   PRM_SpareToken;
typedef UT_VariadicT<PRM_SpareToken>            PRM_SpareArgs;

class PRM_API PRM_SpareData
{
public:
    /// The constructor for the PRM_SpareData should takes a variadic number of
    /// token/value pairs.  For example:
    ///   static PRM_SpareData(PRM_SpareArgs()
    ///         << PRM_SpareToken("token1", "value1")
    ///         << PRM_SpareToken("token2", "value2")
    ///         ...);
    explicit PRM_SpareData(const PRM_SpareArgs &args);

    /// A single token value pair
    explicit PRM_SpareData(const PRM_SpareToken &pair);
     PRM_SpareData();
    ~PRM_SpareData();

    PRM_SpareData(const PRM_SpareData &copy);
    PRM_SpareData &operator=(const PRM_SpareData &copy);

    uint         entries() const;

    void         clear();
    void         mergeFrom(const PRM_SpareData &ref);
    void         copyFrom(const PRM_SpareData &ref);
    
    bool         containsAny(const PRM_SpareData &ref) const;
    bool         containsAll(const PRM_SpareData &ref) const;

    // The the value associated with a particular token.
    const char  *getValue(const UT_StringRef &token) const;

    // Because these are traverseConst functions, we can't remove any items
    // from the table in the traversal functions.
    void         traverseConst(PRM_SpareCallback f) const;
    void         traverseConst(PRM_SpareCallbackWithData f, void *data) const;


    // NOTE:  When addTokenValue is called with a null pointer for the value,
    // the token is deleted from the spare data.
    void         addTokenValue(const UT_StringHolder &token, const char *value);
    void         deleteTokenValue(const UT_StringRef &token);

    // For backward compatibility with the ScriptParmSpareData class, we have
    // these functions.
    static const char *getScriptCallbackToken() 
                     { return PRM_SPARE_SCRIPT_CALLBACK_TOKEN; }
    void         setCallbackData(const char *str)
                     { addTokenValue(getScriptCallbackToken(), str); }
    const char  *getCallbackData() const
                     { return getValue(getScriptCallbackToken()); }

    static const char *getScriptCallbackLanguageToken()
                     { return PRM_SPARE_SCRIPT_CALLBACK_LANGUAGE_TOKEN; }
    void         setCallbackLanguage(CH_ScriptLanguage language);
    CH_ScriptLanguage getCallbackLanguage() const;

    void         setRenderManType(const char *str)
                     { addTokenValue(PRM_SPARE_SCRIPT_RITYPE_TOKEN, str); }
    const char  *getRenderManType() const
                     { return getValue(PRM_SPARE_SCRIPT_RITYPE_TOKEN); }

    void         setOpFilter(const char *str)
                     { addTokenValue(PRM_SPARE_OPFILTER_TOKEN, str); }
    const char  *getOpFilter() const
                     { return getValue(PRM_SPARE_OPFILTER_TOKEN); }

    void         setOpRelative(const char *str)
                     { addTokenValue(PRM_SPARE_OPRELATIVE_TOKEN, str); }
    const char  *getOpRelative() const
                     { return getValue(PRM_SPARE_OPRELATIVE_TOKEN); }

    static const char * getUnquotedStateToken()
                            { return PRM_SPARE_SCRIPT_UNQUOTED_TOKEN; }
    void         setUnquotedState()
                     { addTokenValue(getUnquotedStateToken(), "1"); }
    bool         getUnquotedState() const
                     { return getValue(getUnquotedStateToken()) != 0; }

    void         setMultiStartOffset(int value);
    int          getMultiStartOffset() const;

    void         setVisibleTabs(const UT_BitArray &values);
    void         getVisibleTabs(UT_BitArray &values) const;
    bool         getVisibleTab(int tabidx) const;

    // Ramp
    static const char * getRampBasisDefaultToken()
                            { return PRM_SPARE_RAMP_BASIS_DEFAULT_TOKEN; }
    void                setRampBasisDefault(const char *value)
                            { addTokenValue(getRampBasisDefaultToken(),value); }
    const char *        getRampBasisDefault() const
                            { return getValue(getRampBasisDefaultToken()); }

    static const char * getRampShowControlsDefaultToken()
                            { return PRM_SPARE_RAMP_SHOW_CONTROLS_DEFAULT_TOKEN; }
    void                setRampShowControlsDefault(bool value)
                            {
                                addTokenValue(getRampShowControlsDefaultToken(),
                                              value ? "1" : "0");
                            }
    bool                getRampShowControlsDefault() const
                            {
                                const char *n, *v;
                                n = getRampShowControlsDefaultToken();
                                v = getValue(n);
                                if (!v)
                                    return true;
                                else
                                    return *v != '0';
                            }

    static const char * getRampColorTypeToken()
                            { return PRM_SPARE_RAMP_COLOR_TYPE_TOKEN; }
    static const char * getRampColorTypeValueToken(UT_ColorType color_type);
    void                setRampColorType(UT_ColorType color_type);
    UT_ColorType        getRampColorType() const;

    static const char * getRampBasisVarToken()  
                    { return PRM_SPARE_RAMP_BASIS_VAR_TOKEN; }
    static const char * getRampKeysVarToken()   
                    { return PRM_SPARE_RAMP_KEYS_VAR_TOKEN; }
    static const char * getRampValuesVarToken() 
                    { return PRM_SPARE_RAMP_VALUES_VAR_TOKEN; }

    void         setRampBasisVar(const char *value)
                    { addTokenValue(getRampBasisVarToken(), value); }
    const char * getRampBasisVar() const
                    { return getValue(getRampBasisVarToken()); }
    void         setRampKeysVar(const char *value)
                    { addTokenValue(getRampKeysVarToken(), value); }
    const char * getRampKeysVar() const
                    { return getValue(getRampKeysVarToken()); }
    void         setRampValuesVar(const char *value)
                    { addTokenValue(getRampValuesVarToken(), value); }
    const char * getRampValuesVar() const
                    { return getValue(getRampValuesVarToken()); }

    static const char * getColorRampDefaultToken() 
                    {return PRM_SPARE_RAMP_COLOR_DEFAULT_TOKEN;}
    const char *        getColorRampDefaultValue() const
                            { return getValue(getColorRampDefaultToken()); }
    static const char * getFloatRampDefaultToken() 
                    {return PRM_SPARE_RAMP_FLOAT_DEFAULT_TOKEN;}
    const char *        getFloatRampDefaultValue() const
                            { return getValue(getFloatRampDefaultToken()); }
    void                setRampDefaultFromParm(const PRM_Parm &ramp_parm);
    void                getRampDefaultToParm(PRM_Parm &ramp_parm) const;

    // Color UI Mode, Wheel flag and Dynamic flag
    static const char * getColorTypeToken()
                            { return PRM_SPARE_COLOR_TYPE_TOKEN; }
    static const char * getColorTypeValueToken(PRM_ColorType color_type);
    void                setColorType(PRM_ColorType color_type);
    PRM_ColorType getColorType() const;
    
    static const char * getColorWheelToken()
                            { return PRM_SPARE_COLOR_WHEEL_TOKEN; }
    void                setColorWheel(bool value);
    bool getColorWheel() const;

    static const char * getColorDynamicToken()
                            { return PRM_SPARE_COLOR_DYN_TOKEN; }
    void                setColorDynamic(bool value);
    bool getColorDynamic() const;
    
    static const char * getKeyValueDictKeyLabelToken()
                        { return PRM_SPARE_KEY_VALUE_DICT_KEY_LABEL_TOKEN; }
    void         setKeyValueDictKeyLabel(const char *label);
    const char  *getKeyValueDictKeyLabel() const;
    static const char * getKeyValueDictValueLabelToken()
                        { return PRM_SPARE_KEY_VALUE_DICT_VALUE_LABEL_TOKEN; }
    void         setKeyValueDictValueLabel(const char *label);
    const char  *getKeyValueDictValueLabel() const;
    static const char * getKeyValueDictUseChooserToken()
                        { return PRM_SPARE_KEY_VALUE_DICT_USE_CHOOSER_TOKEN; }
    void         setKeyValueDictUseChooser(bool use_chooser);
    bool         getKeyValueDictUseChooser() const;
    static const char * getKeyValueDictChooserLabelToken()
                        { return PRM_SPARE_KEY_VALUE_DICT_CHOOSER_LABEL_TOKEN; }
    void         setKeyValueDictChooserLabel(const char *label);
    const char  *getKeyValueDictChooserLabel() const;
    static const char * getKeyValueDictChooserCallbackToken()
                    { return PRM_SPARE_KEY_VALUE_DICT_CHOOSER_CALLBACK_TOKEN; }
    void         setKeyValueDictChooserCallback(const char *label);
    const char  *getKeyValueDictChooserCallback() const;

    void         setXCFMode(const char *value)
                    { return addTokenValue(PRM_SPARE_XCF_MODE_TOKEN, value); }
    const char  *getXCFMode() const
                    { return getValue(PRM_SPARE_XCF_MODE_TOKEN); }

    const char  *getScriptAction() const;
    const char  *getScriptActionHelp() const;
    const char  *getScriptActionIcon() const;
    const char  *getButtonIcon() const;

    bool         getUseEditor() const;
    const char  *getEditorLanguage() const 
                    { return getValue(PRM_SPARE_EDITOR_LANG_TOKEN); }
    void         getEditorLinesRange(int &lines_min, int &lines_max) const;
    static inline int    getEditorLinesRangeDefaultMin() { return 8; }
    static inline int    getEditorLinesRangeDefaultMax() { return 40; }

    static const char   *getXCFModeFloatValToken() { return "float"; }

    // Token for whether the template will be used for cooking
    static const char * getCookDependentToken() 
                    { return PRM_SPARE_COOK_DEPENDENT_TOKEN; }
    // Get state of cook_dependent flag.
    // This is only used for SPARE parameters, which if this tag doesn't exist,
    // the spare parm defaults to false for cook dependent.
    bool                getCookDependent() const;
    // Set state of cook_dependent flag.
    // This is only used for SPARE parameters, which if this tag doesn't exist,
    // the spare parm defaults to false for cook dependent.
    void                setCookDependent(bool flag);

    // Token for whether the parm on the VOP should regenerate code
    static const char *getCodeGenDependentToken() 
                    { return PRM_SPARE_CODE_GENERATION_TOKEN; }
    // Get the state of the code_generation flag
    // This is only used for SPARE parameters, which if this tag doesn't exist,
    // the spare parm defaults to true for code generation
    bool               getCodeGenDependent() const;
    // Set state of code_generation flag.
    // This is only used for SPARE parameters, which if this tag doesn't exist,
    // the spare parm defaults to true for code generation
    void               setCodeGenDependent(bool flag);

    int64        getMemoryUsage(bool inclusive) const;

    static const char   *getOpFilterKeyFromName(const char *name);
    static const char   *getOpFilterKeyFromLabel(const char *name);
    static const char   *getOpFilterNameFromKey(const char *key);
    static const char   *getOpFilterLabelFromKey(const char *key);
    // End of backward compatibility

    // Convenience spare data you might want to use
    static PRM_SpareData objNetRef;             // /obj
    static PRM_SpareData chNetRef;              // /ch
    static PRM_SpareData ropNetRef;             // /out

    static PRM_SpareData objPath;               // !!OBJ!!
    static PRM_SpareData objGeometryPath;       // !!OBJ/GEOMETRY!!
    static PRM_SpareData objLightPath;          // !!OBJ/LIGHT!!
    static PRM_SpareData objBonePath;           // !!OBJ/BONE!!
    static PRM_SpareData objMusclePath;         // !!OBJ/MUSCLE!!
    static PRM_SpareData objCameraPath;         // !!OBJ/CAMERA!!
    static PRM_SpareData dopPath;               // !!DOP!!
    static PRM_SpareData sopPath;               // !!SOP!!
    static PRM_SpareData popPath;               // !!POP!!
    static PRM_SpareData ropPath;               // !!ROP!!
    static PRM_SpareData cop2Path;              // !!COP2!!
    static PRM_SpareData chopPath;              // !!CHOP!!
    static PRM_SpareData constraintsPath;       // !!CHOP!!
    static PRM_SpareData shopPath;              // !!SHOP!!
    static PRM_SpareData shopProperties;        // !!SHOP/PROPERTIES!!
    static PRM_SpareData shopMaterial;          // !!SHOP/MATERIAL!!
    static PRM_SpareData shopSurface;           // !!SHOP/SURFACE!!
    static PRM_SpareData shopDisplacement;      // !!SHOP/DISPLACEMENT!!
    static PRM_SpareData shopSurfaceShadow;     // !!SHOP/SURFACE_SHADOW!!
    static PRM_SpareData shopBackground;        // !!SHOP/BACKGROUND!!
    static PRM_SpareData shopGeometry;          // !!SHOP/GEOMETRY!!
    static PRM_SpareData shopAtmosphere;        // !!SHOP/ATMOSPHERE!!
    static PRM_SpareData shopPhoton;            // !!SHOP/PHOTON!!
    static PRM_SpareData shopPhotonVolume;      // !!SHOP/PHOTONVOLUME!!
    static PRM_SpareData shopContour;           // !!SHOP/CONTOUR!!
    static PRM_SpareData shopLight;             // !!SHOP/LIGHT!!
    static PRM_SpareData shopEmitter;           // !!SHOP/EMITTER!!
    static PRM_SpareData shopLightShadow;       // !!SHOP/LIGHT_SHADOW!!
    static PRM_SpareData shopLens;              // !!SHOP/LENS!!
    static PRM_SpareData shopOutput;            // !!SHOP/OUTPUT!!
    static PRM_SpareData shopContourStore;      // !!SHOP/CONTOUR_STORE!!  
    static PRM_SpareData shopContourContrast;   // !!SHOP/CONTOUR_CONTRAST!!  
    static PRM_SpareData shopImage3d;           // !!SHOP/IMAGE3D!!  
    static PRM_SpareData shopCVEX;              // !!SHOP/CVEX!!
    static PRM_SpareData shopCoShader;          // !!SHOP/COSHADER!!
    static PRM_SpareData vopPath;               // !!VOP!!
    static PRM_SpareData lopPath;               // !!LOP!!
    static PRM_SpareData topPath;               // !!TOP!!
    static PRM_SpareData topSchedulerPath;      // !!TOP/SCHEDULER!!
    static PRM_SpareData topProcessorPath;      // !!TOP/PROCESSOR!!
    static PRM_SpareData topPartitionerPath;    // !!TOP/PARTITIONER!!
    static PRM_SpareData topMapperPath;         // !!TOP/MAPPER!!
    static PRM_SpareData filterMaterial;        // !!CUSTOM/MATERIAL!!

    static PRM_SpareData autoScope;             // autoscope

    static PRM_SpareData multiStartOffsetZero;  // multistart offset of zero
    static PRM_SpareData multiStartOffsetOne;   // multistart offset of one

    static PRM_SpareData unitsLength;                     // m1
    static PRM_SpareData unitsPerLength;                  // m-1
    static PRM_SpareData unitsPerArea;                    // m-2
    static PRM_SpareData unitsMass;                       // kg1
    static PRM_SpareData unitsPerMass;                    // kg-1
    static PRM_SpareData unitsTime;                       // s1
    static PRM_SpareData unitsPerTime;                    // s-1
    static PRM_SpareData unitsPerSquareTime;              // s-2
    static PRM_SpareData unitsVelocity;                   // m1s-1
    static PRM_SpareData unitsAngVelocity;                // s-1
    static PRM_SpareData unitsAcceleration;               // m1s-2
    static PRM_SpareData unitsAngAcceleration;            // s-2
    static PRM_SpareData unitsForce;                      // kg1m1s-2
    static PRM_SpareData unitsForceDensity;               // kg1m-2s-2
    static PRM_SpareData unitsImpulse;                    // kg1m1s-1
    static PRM_SpareData unitsTorque;                     // kg1m2s-2
    static PRM_SpareData unitsDrag;                       // kg1s-1
    static PRM_SpareData unitsAngDrag;                    // kg1m2s-1
    static PRM_SpareData unitsPressure;                   // kg1m-1s-2
    static PRM_SpareData unitsSpringConstant;             // kg1s-2
    static PRM_SpareData unitsLinearDensity;              // kg1m-1
    static PRM_SpareData unitsLinearDensityPerTime;       // kg1m-1s-1
    static PRM_SpareData unitsLinearDensityPerSquareTime; // kg1m-1s-2
    static PRM_SpareData unitsAreaDensity;                // kg1m-2
    static PRM_SpareData unitsAreaDensityPerTime;         // kg1m-2s-1
    static PRM_SpareData unitsAreaDensityPerSquareTime;   // kg1m-2s-2
    static PRM_SpareData unitsDensity;                    // kg1m-3
    static PRM_SpareData unitsDensityPerTime;             // kg1m-3s-1
    static PRM_SpareData unitsDensityPerSquareTime;       // kg1m-3s-2
    static PRM_SpareData unitsNone;                       // ""

    static PRM_SpareData rampBasisDefault;      // rampbasis "ramp_basis"
    static PRM_SpareData rampKeysDefault;       // rampkeys "ramp_keys"
    static PRM_SpareData rampValuesDefault;     // rampvalues "ramp_values"

    static PRM_SpareData attribAccessR;  // "sidefx::attrib_access" "read"
    static PRM_SpareData attribAccessW;  // "sidefx::attrib_access" "write"
    static PRM_SpareData attribAccessRW; // "sidefx::attrib_access" "readwrite"

    static PRM_SpareData connectorKindNone; // "sidefx::connector_kind" "none"
    static PRM_SpareData connectorKindIn;   // "sidefx::connector_kind" "in"
    static PRM_SpareData connectorKindOut;  // "sidefx::connector_kind" "out"
    static PRM_SpareData connectorKindInOut;// "sidefx::connector_kind" "inout"

    static PRM_SpareData shaderIsShaderParm;    // "sidefx::shader_isparm" "1"
    static PRM_SpareData shaderIsNotShaderParm; // "sidefx::shader_isparm" "0"

    /// Used to set a space- or comma-separated list of globs to use as 
    /// file filter for parameters of type @c PRM_FILE (e.g. "*.txt *.log").
    static const char *getFileChooserPatternToken()
                            { return PRM_SPARE_FILE_CHOOSER_PATTERN_TOKEN; }

    static const char *getFileChooserModeToken()
                            {return PRM_SPARE_FILE_CHOOSER_MODE_TOKEN;}
    static const char *getFileChooserModeValRead()      
                            { return "read"; }
    static const char *getFileChooserModeValWrite()     
                            { return "write"; }
    static const char *getFileChooserModeValReadAndWrite() 
                            { return "read_and_write"; }

    static PRM_SpareData fileChooserModeRead;   // filechooser_mode "read"
    static PRM_SpareData fileChooserModeWrite;  // filechooser_mode "write"
    static PRM_SpareData fileChooserModeReadAndWrite;   // ... "read_and_write"

    static PRM_SpareData stringFloatXCF;        // float XCF in string field

    static const char *getScriptActionToken()   
                            { return PRM_SPARE_SCRIPT_ACTION_TOKEN; }
    static const char *getScriptActionHelpToken()
                            { return PRM_SPARE_SCRIPT_ACTION_HELP_TOKEN; }
    static const char *getScriptActionIconToken()
                            { return PRM_SPARE_SCRIPT_ACTION_ICON_TOKEN; }
    static const char *getButtonIconToken()     
                            { return PRM_SPARE_BUTTON_ICON_TOKEN; }

    static const char *getEditorToken() 
                            { return PRM_SPARE_EDITOR_TOKEN; }
    static PRM_SpareData stringEditor;          // Use a text editor for strings

    static const char *getEditorLanguageToken()
                            { return PRM_SPARE_EDITOR_LANG_TOKEN; }
    static PRM_SpareData stringEditorLangVex;
    static PRM_SpareData stringEditorLangPython;
    static PRM_SpareData stringEditorLangHScript;
    static PRM_SpareData stringEditorLangExpr;

    /// Number of lines to show by default. This value can be set as either
    /// a single number or a range, e.g. '10-50'. The minimum number is what
    /// the editor will originally show up as, but will attempt to expand up to
    /// the maximum.
    static const char *getEditorLinesRangeToken()       
                            { return PRM_SPARE_EDITOR_LINES_TOKEN; }

    // token indicating the parameter comes from a Parameter VOP (ie it is a
    // shader parameter)
    static const char * getParmVopVarToken()        
                            { return PRM_SPARE_PARM_VOP_TOKEN; }

    // space-separated list of shading contexts, which a material parameter 
    // belongs to, ie, shaders for each of these contexts actually have
    // this parameter as an argument, since material may contain other shaders
    // for other contexts to which a parameter does not apply
    static const char * getShaderParmContextsToken()   
                            { return PRM_SPARE_SHADER_PARM_CONTEXTS_TOKEN; }

    // token specifying special keywords that are legal in an oppath parameter
    // (in addition to the node path itself)
    static const char * getOpPathKeywordsToken()    
                            { return PRM_SPARE_OPPATH_KEYWORDS_TOKEN; }

    // token for unit specification
    static const char * getUnitsToken()                 
                            { return PRM_SPARE_UNITS_TOKEN; }
    
    // token for group specialization (simple/collapsible/toggle groups).
    static const char   *getGroupTypeToken()
                            { return PRM_SPARE_GROUP_TYPE_TOKEN; }
    static PRM_SpareData groupTypeSimple;
    static PRM_SpareData groupTypeCollapsible;
    static PRM_SpareData groupTypeCollapsibleExpanded;
    static const char   *getGroupDefaultToken()
                            { return PRM_SPARE_GROUP_DEFAULT_TOKEN; }

    // Marks parameter has having varying default values
    // Defaults to "0"
    static const char   *getVaryingDefaultToken()
                            { return PRM_SPARE_VARYING_DEFAULT_TOKEN; }
    static PRM_SpareData varyingDefault;
    bool                 getHasVaryingDefault() const;
    void                 setHasVaryingDefault(bool f);

    // Gets information about whether this parm accepts one or more USD
    // primitive paths, and/or USD collections.
    static const char   *getUsdPathTypeToken()
                            { return PRM_SPARE_USDPATHTYPE_TOKEN; }
    static PRM_SpareToken usdPathTypePrim;
    static PRM_SpareToken usdPathTypePrimList;
    const char          *getUsdPathType() const;

    // Gets a value that describes which input's stage is the source for
    // the primitive(s) in this parameter. This string is evaluated by the
    // CH_Manager, so it can be a constant (0, 1, or 2) or an expression
    // that looks at other parameter values.
    static const char   *getUsdPathInputToken()
                            { return PRM_SPARE_USDPATHINPUT_TOKEN; }
    static PRM_SpareToken usdPathInputFirst;
    static PRM_SpareToken usdPathInputSecond;
    const char          *getUsdPathInput() const;

    // Identifies the node parameter as shader parameter.
    static const char   *getIsShaderParmToken()
                            { return PRM_SPARE_IS_SHADER_PARM_TOKEN; }

    // Forces the translation of shader parameter even if it's at default value.
    static const char   *getForceParmValueToken()
                            { return PRM_SPARE_FORCE_SHADER_PARM_VAL_TOKEN; }

    // Marks a data parm for whether or not it should be saved to disk
    static const char   *getSaveValueToken()
                            { return PRM_SPARE_SAVE_VALUE_TOKEN; }
    static PRM_SpareData saveValueAlways; // "sidefx::save_value" "1"
    static PRM_SpareData saveValueNever;  // "sidefx::save_value" "0"
    const char          *getSaveValue() const;
    void                 setSaveValue(bool flag);

    // Houdini Engine for Maya: Informs Maya that this parameter should be able
    // to be set by component selection.
    static const char   *getMayaComponentSelectionTypeToken()
                            { return PRM_SPARE_MAYA_COMPONENT_SELECTION_TYPE_TOKEN; }
    static PRM_SpareData mayaComponentSelectionTypeVertex;
    static PRM_SpareData mayaComponentSelectionTypeEdge;
    static PRM_SpareData mayaComponentSelectionTypeFace;
    static PRM_SpareData mayaComponentSelectionTypeUV;

    /// Return true if the given token is a built-in (internally used) spare
    /// data token.
    static bool  isBuiltInToken(const UT_StringRef &token);

    /// Return a range of the built-in tags names.
    static void builtInTokens(UT_StringArray &tokens);

private:
    UT_ArrayStringMap<prm_SharedString> myTokens;
};

#endif