OP_MultiparmInfo.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:        OP_MultiparmInfo.h ( OP Library, C++)
 *
 * COMMENTS:
 *      This class holds information usedto initialize multiparm instances
 *      in OP_Parameters::initMultiparmInstance.
 */

#ifndef __OP_MultiparmInfo_h__
#define __OP_MultiparmInfo_h__

#include "OP_API.h"
#include "OP_Parameters.h"
#include <UT/UT_StringArray.h>
#include <iosfwd>

class OP_API OP_MultiparmInfo
{
public:
                         OP_MultiparmInfo(OP_Parameters &owner);
                        ~OP_MultiparmInfo();

    // Returns the number of multiparm links stored here.
    int                  entries() const;
    // Returns the specified referenced parm.
    const UT_StringHolder       &getReferencedChannel(int index) const;
    // Returns the specified instance parm.
    const UT_StringHolder       &getInstanceChannel(int index) const;

    // Associates an instance channel with a referenced channel. If the
    // instance channel is already referenced, the new value replaces the
    // old. A null or empty reference clears that reference. A detailed
    // error message is returned in the error parameter.
    bool                 setReference(const char *instancechannel,
                                const char *referencedchannel,
                                UT_String &error);

    // Performs pattern matching to find the instance channel that best
    // matches the passed in channel name. The referenced channel is returned
    // with appropriate replacements already done.
    bool                 getReferencedChannel(const char *instancechannel,
                                UT_String &referencedchannel) const;

    // Performs pattern matching to find the instance channel that best
    // matches the passed in channel name. The referenced channel is returned
    // with appropriate replacements already done. channel should be the pure
    // multiparm name, and indices must hold the applicable replacements.
    //
    // More specificially, this function checks if the input channel matches one
    // of the instance channels. The input channel matches a string if it's
    // equal to the string when some of its #'s are replaced by numbers in the
    // indices array (indices(0) can only replace the first occurrence of #,
    // indices(1) can only replace the second, etc.) If such a match is found,
    // the work buffer will hold the corresponding reference channel, with first
    // # replaced by the first UNUSED entry in indices, etc.
    bool                 getReferencedChannel(const char* channel,
                                              const UT_IntArray& indices,
                                              UT_WorkBuffer& referenced) const;

    // Saves the opmultiparm commands required to set up the current
    // set of references. The "opmultiparm" and node name parts of the
    // command are not saved, and must be output before calling this
    // funtion.
    void                 saveCommands(std::ostream &os) const;

    // Saves the multiparm info as into a hip file.
    void                 save(std::ostream &os, bool binary) const;

    // Loads multiparm info as from a hip file.
    bool                 load(UT_IStream &is);

    // Save undo block
    void                 saveForUndo();

    // Tries to match a specific channel name (instancechannel) with a
    // generic channel name containing "#"s (genericinstancechannel).
    // The numeric replacements required to match the channel names
    // are stored in the hashreplacements array.
    static bool          matchChannels(const char *instancechannel,
                                const char *genericinstancechannel,
                                UT_IntArray &hashreplacements);

    int64                getMemoryUsage(bool inclusive) const
    {
        int64 mem = inclusive ? sizeof(*this) : 0;
        mem += myInstanceChannels.getMemoryUsage(false);
        mem += myReferencedChannels.getMemoryUsage(false);
        return mem;
    }

    class Undo;
    friend class Undo;

private:
    OP_Parameters       &myOwner;
    UT_StringArray       myInstanceChannels;
    UT_StringArray       myReferencedChannels;
};

#endif