PI_ResourceManager.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:        PI_ResourceManager.h ( Direct Manipulation Library, C++)
 *
 * COMMENTS:
 *      This class maintains a table of all states, handles, op-handle links,
 *      and input selectors.  All state, handle, and op-handle link objects
 *      are created and deleted through a PI_ResourceManager.  The active one
 *      is obtained via the global function BMgetResourceManager().
 */

#ifndef __PI_ResourceManager_H__
#define __PI_ResourceManager_H__

#include "PI_API.h"
#include "PI_ResourceTemplate.h"
#include "PI_SettingList.h"
#include "PI_PythonResourceTypes.h"

#include <OP/OP_Error.h>
#include <OP/OP_OperatorTable.h>
#include <UT/UT_Array.h>
#include <UT/UT_String.h>
#include <UT/UT_StringMap.h>
#include <UT/UT_SymbolTable.h>
#include <UT/UT_ValArray.h>
#include <SYS/SYS_Hash.h>
#include <utility>

class CPP_Manager;
class PRM_Template;
class OP_Operator;
class OP_OperatorTable;
class OP_Node;
class CMD_Args;
class PI_OpHandleLink;
class pi_OpHandleBinding;
class pi_OpSelectorBinding;

namespace PI_PythonState
{
    class Template;
}

namespace PI_PythonHandle
{
    class Template;
}

/// Error codes retured by PI_ResourceManager bind methods
/// @{
#define PI_BIND_OK                       1
#define PI_NO_TEMPLATE_FOR_HANDLE       -2
#define PI_INVALID_OP_PARM              -3 
#define PI_INVALID_PI_PARM              -4 
#define PI_BINDING_EXISTS               -5
#define PI_INVALID_OP_FOR_PI            -6
/// @}

typedef void (*PI_SaveCallback)(void *data);

class PI_API PI_BindingParmInfo
{
public:
    PI_BindingParmInfo()        { }

    // Note this is the channel name: the receiver should do a
    // PRM_ParmList::getParmPtrFromChannel to get the parm.
    const UT_String             &getOpParm() const
                                 { return myOpParm; }
    const UT_String             &getPIParm() const
                                 { return myPIParm; }
    int                          operator==(const PI_BindingParmInfo &i) const
                                 { return (this == &i); }

private:
    UT_String            myOpParm;
    UT_String            myPIParm;
    friend class         pi_OpHandleBinding;
};

using PI_BindingParmArray = UT_Array<PI_BindingParmInfo>;
using PI_OpHandleLinkMap = UT_SymbolMap<PI_PITemplate *>;
using PI_HandleTemplateMap = UT_SymbolMap<PI_HandleTemplate *>;
using PI_SelectorTemplateMap = UT_SymbolMap<PI_SelectorTemplate *>;

class PI_API PI_BindingHandleInfo
{
public:
    PI_BindingHandleInfo()      { }

    const UT_String             &getPIName() const
                                 { return myPIName; }
    const UT_String             &getPIDescription() const
                                 { return myPIDescription; }
    const PI_SettingList        &getDefaultSettings() const
                                 { return myDefaultSettings; }
    int                          getId() const
                                 { return myId; }
    const PI_BindingParmArray   &getBindings() const
                                 { return myBindings; }
    int                          operator==(const PI_BindingHandleInfo &i) const
                                 { return (this == &i); }

private:
    UT_String            myPIName;
    UT_String            myPIDescription;
    PI_SettingList       myDefaultSettings;
    int                  myId;
    PI_BindingParmArray  myBindings;
    friend class         pi_OpHandleBinding;
};
using PI_BindingHandleArray = UT_Array<PI_BindingHandleInfo>;

// See the bindSelector function for a description of all the data
// members of this class. They map directly to the bindSelector parameters.
class PI_API PI_BindingSelectorInfo
{
public:
    PI_BindingSelectorInfo() { }

    const UT_String     &getName() const
                         { return myName; }
    const UT_String     &getDescription() const
                         { return myDescription; }
    const UT_String     &getPrompt() const
                         { return myPrompt; }
    const UT_String     &getOpParm() const
                         { return myOpParm; }
    const UT_String     &getMenu() const
                         { return myMenu; }
    const UT_String     &getPrimMask() const
                         { return myPrimMask; }
    int                  getOpInput() const
                         { return myOpInput; }
    bool                 getOpInputReq() const
                         { return myOpInputReq; }
    bool                 getAllowDrag() const
                         { return myAllowDrag; }
    bool                 getAstSelAll() const
                         { return myAstSelAll; }
    const UT_String     &getExtraInfo() const
                         { return myExtraInfo; }
    int                  operator==(const PI_BindingSelectorInfo &i) const
                         { return (this == &i); }

private:
    UT_String            myName;
    UT_String            myDescription;
    UT_String            myPrompt;
    UT_String            myOpParm;
    UT_String            myMenu;
    UT_String            myPrimMask;
    int                  myOpInput;
    bool                 myOpInputReq;
    bool                 myAllowDrag;
    bool                 myAstSelAll;
    UT_String            myExtraInfo;
    friend class         pi_OpSelectorBinding;
};
using PI_BindingSelectorArray = UT_Array<PI_BindingSelectorInfo>;

class PI_API PI_ResourceManager : public OP_UpdateTableSink,
                           public OP_UpdateTemplatesSink
{
public:
             PI_ResourceManager();
            ~PI_ResourceManager() override;

    // Return 1 on success and 0 if the state/handle/op-handle link
    // is already registered.
    virtual int          registerState(PI_StateTemplate *type);
    virtual int          registerHandle(PI_HandleTemplate *type);
    virtual int          registerOpHandleLink(PI_PITemplate *type);
    virtual int          registerSelector(PI_SelectorTemplate *type);

    bool                 containsState(const char *name,
                                       PI_ViewerType viewer_type,
                                       unsigned netmask) const;
    bool                 containsHandle(const char *name) const;
    bool                 containsOpHandleLink(const char *name) const;
    bool                 containsSelector(const char *name) const;

    // Get all the bound handles and parms for a given op type.
    const PI_BindingHandleArray
                        *getBindingHandles(OP_Operator *op) const;
    // Get all the bound selectors for a given op type.
    const PI_BindingSelectorArray
                        *getBindingSelectors(OP_Operator *op) const;

    // Return the list of states that can be used in a viewer for the
    // specified network type.
    const UT_ValArray<PI_StateTemplate *>
                        &stateList(PI_ViewerType viewer_type,
                                   const char *network_type) const;
    const UT_ValArray<PI_StateTemplate *>
                        &stateList(PI_ViewerType viewer_type,
                                   PI_NetworkType net_type) const;
    PI_StateTemplate    *getStateTemplate(const char *name,
                                          PI_ViewerType viewer_type,
                                          const char *type) const;
    PI_StateTemplate    *getStateTemplate(OP_Operator *op,
                                          PI_ViewerType viewer_type,
                                          const char *type) const;

    // Viewer state handling
    // Return the registration status of a state template.
    virtual PI_PythonResource::RegisterStatus 
    getViewerStateRegisterStatus(
        const char* state_name, PI_ViewerType viewer_type, const char* type) const;

    // Fires a register viewer state event callback
    virtual void fireResourceEvent(
                PI_PythonResource::ResourceType                 res_type,    
                PI_PythonResource::EventMessage::Type           event_type,
                PI_PythonResource::EventMessage::Data const&    event_data);

    // return true if the state name is valid 
    bool validStateTemplateName(const char* name) const;

    // unregister a python viewer state
    virtual PI_PythonResource::Status unregisterViewerState(const char* name);

    // return true if a viewer state is registered
    virtual bool isRegisteredViewerState(const char* name) const;

    // return a viewer state given a name
    virtual PI_PythonState::Template const * viewerStateTemplate(const char * state_name) const;
    virtual PI_PythonState::Template * viewerStateTemplate(const char * state_name) ;

    // Viewer Handles
    virtual PI_PythonResource::Status unregisterViewerHandle(const char* name);
    virtual bool isRegisteredViewerHandle(const char* name) const;

    virtual PI_PythonHandle::Template const*    
    viewerHandleTemplate(const char* handle_name) const;

    // These are functions which are called from commands that allow
    // for dynamic binding of handles to parameters
    int                  unbind(OP_Operator *op, const char *pidescription,
                                const UT_String &opparm);
    int                  bind(OP_Operator *op, const char *piname,
                                const char *pidescription,
                                const UT_String &opparm,
                                const UT_String &piparm,
                                const char *default_settings);
    // this API is typically used for handle late-binding e.g. python states
    // would provide functions for binding handle parms
    int                  bind(OP_Operator *op, const char *piname,
                                const char *pidescription,
                                const char *default_settings);
    int                  bindScriptOp(OP_Operator *op, const char *piname,
                                const char *pidescription,
                                const UT_String &opparm,
                                const UT_String &piparm,
                                const char *default_settings);

    // Used for binding node operators to registered viewer states (i..e. python states)
    // returns true if the operation succeeded
    virtual bool bindOperatorToViewerState(const char* state_name, OP_Operator* op);

    // Returns true if a state is expected to exist for an operator of a given 
    // network type. By design, management operators are not expected to operate 
    // outside their own network, this function will return false in this case.
    //
    // op_name: operator name
    // op_type: operator type e.g. DOP
    bool operatorStateMandatory(const char* op_name, const char* op_type) const;

    /// Unbind the given selector from an operator. Uses the short description
    /// when bound using bindSelector()
    int                  unbindSelector(OP_Operator *op,
                                const char *seldescription);

    /// Dynamic binding of a selector to an operator
    ///
    /// @param op               Operator type that we want to bind a selector to
    /// @param sname            Selector type
    /// @param seldescription   Short description that identifies this selector
    ///                         in the context of a one operator (used to
    ///                         unbind the selector).
    /// @param prompt           Text in the status area when the selector is
    ///                         active.
    /// @param opparm           Operator parameter where the selection string
    ///                         is put.
    /// @param opinput          Wire input index where the op owning the
    ///                         selected geometry is attached to our op.
    /// @param opinputreq       Is an input is required?
    /// @param primmask         Mask of which primitive types can be in the
    ///                         selection. This uses the *_FILEID enum in
    ///                         GEO_PrimTypeCompat.h. A regular
    ///                         GEO_PrimTypeCompat mask can be used if you
    ///                         first convert it using
    ///                         GEO_PrimTypeCompat::convertToFileFromMask()
    /// @param allowdrag        Determines if click-and-drag operations are
    ///                         allowed.
    /// @param menu             Operator menu parameter where we choose the
    ///                         selection type.
    /// @param astselall        If an asterisk is required in the selection
    ///                         string to indicate selecting all the input.
    ///                         Otherwise we assume an empty string indicates
    ///                         that the whole geometry is selected.
    /// @param extrainfo        String that is passed to the selector,
    ///                         particular selectors may need specific
    ///                         parameters that can be passed through this
    ///                         mechanism.
    /// @param fromScriptOp     Used by our dialog script parser to avoid
    ///                         infinite recursion. Setting this flag decreases
    ///                         the error checking we do.
    ///
    /// @return PI_BIND_OK upon success, else see of one of the other potential
    ///         error codes at the top of PI_ResourceManager.h
    int                  bindSelector(OP_Operator *op, const char *sname,
                                const char *seldescription,
                                const char *prompt, const char *opparm,
                                int opinput, int opinputreq,
                                const char *primmask, int allowdrag,
                                const char *menu, int astselall,
                                const char *extrainfo, bool fromScriptOp);

    //Helper functions for the above
    PRM_Template        *getTemplateAndVecId(const UT_String &,
                                             OP_Operator *, 
                                             int &) const;

    // This is for converting old style "t 2" into new style "tz".  It
    // only works if the operator has the template already, else it
    // assumes channel name == parmname.  Thus, it won't work on 
    // multiparms that only exist with OP_Node, not OP_Operator.
    void                 getChannelNameFromParmAndVec(UT_String &chan,
                                    OP_Operator *op, const char *parmname,
                                    int vecidx);

    int                 checkForPIName( const char *pi_name, 
                                        const char *pi_parm ) const;

    OP_Operator         *findOperator(PI_NetworkType net_type,
                                      const char *op_name,
                                      bool display_warning = true) const;
    OP_Operator         *findOperator(const char *opbindname,
                                      UT_String *optype = 0) const;

    virtual void         findVolatileKeys(const char *volatile_hotkey_name,
                                          UT_Array<int> &volatile_keys,
                                          UT_Array<int> &keys_modifiers) 
                                          const;
    virtual void         updateViewports(int id, const char *opname,
                                         bool open_only = false) const;

    //These methods are used in PI_ResourceManagerCommand.C.
    const PI_OpHandleLinkMap &getOpHandleLinks() const { return myOpHandleLinks; }
    PI_PITemplate       *getOpHandleLinkTemplate(const char *pi_name) const;
    const PI_SelectorTemplateMap &getSelectors() const { return mySelectors; }
    PI_SelectorTemplate *getSelectorTemplate(const char *selector_name) const;

    // The following method is used by builddialogs
    const PI_HandleTemplateMap &getHandles() const { return myHandles; }

    // Tell us if the pi with the given name is an invisible PI by nature.
    // Optionally return the type of the pi in isfloat (int or float assumed)
    bool                 isPIEthereal(const char *piname,
                                      bool *isfloat = 0) const;

    // Because the order of callbacks for OP_UpdateTableSink is
    // undefined, some callbacks rely on the resource manager's table of states
    // to be accurate.  Since the resource manager's callback can happen
    // after the other callbacks, they can call these methods to ensure the
    // resource manager's table is accurate.
    void ensureStatesExistForAllOperators(const char *net_type_name);
    virtual void ensureStatesExistForAllOperators(PI_NetworkType net_type);

    // Map a viewer type token to a PI_ViewerType, or vice-versa.
    static bool                  getViewerType(const char *viewer_type_token,
                                               PI_ViewerType &type);
    static void                  getViewerTypeToken(PI_ViewerType type,
                                                UT_String &viewer_type_token);
    
    // Map the network name returned by OP_Node::getOpType() to a
    // PI_NetworkType, or vice-versa.
    static bool                  getNetworkType(const char *network_type_name,
                                                PI_NetworkType &type);
    static const UT_StringHolder &getNetworkTypeName(PI_NetworkType type);
    static OP_OperatorTable     *getOpTableFromOperator(const OP_Operator *op);

    // Choose the first network type from a mask that contains multiple ones.
    static PI_NetworkType        getFirstNetworkType(unsigned int network_mask);

    static PRM_Template         *findParmTemplate(OP_Operator &op,
                                                  const char *op_Parm_name,
                                                  int vec_idx, int *parm_idx);

    // Write out our bindings information to a file.
    int                  writeBindingsFile(const char *fname) const;

    // Load/save/remove the settings for a particular PI and a node that's
    // linked to it.
    void                 loadPISettingsFromTables(PI_OpHandleLink &pi,
                                      bool okay_to_use_last_settings) const;
    void                 savePISettingsToTables(PI_OpHandleLink &pi);
    virtual void         removePISettingsFromTables(OP_Operator &op_type);
    void                 removePISettingsFromTables(const PI_OpHandleLink &pi);

    // Record settings for a particular PI.  This method should only be
    // called by the omparm command.
    void                 recordPISettings(const char *pi_description,
                                          const char *pi_type,
                                          const OP_Node &op_node,
                                          const char *settings);

    // Objects may add callbacks that are called just before the resource
    // manager saves its data to the hip file.  These callbacks update
    // the resource manager to make sure the data it saves is current.
    void                 addSaveCallback(PI_SaveCallback callback, void *data);
    void                 removeSaveCallback(PI_SaveCallback callback,
                                            void *data);

    void                 registerOpHandleBindings();
    virtual void         removeAllBindings(OP_Operator *op);

    // Returns the name of the state being created
    char const*         stateToCreate() const;

    // Set by BM_PythonSupport to give access to the python support 
    // object while the python resource instance is being created.
    void setPythonResourceSupport(void* res_support);
    void* getPythonResourceSupport();

protected:
    static void          startParmsCache();
    static void          stopParmsCache();
    static void          getParmsCache(UT_ValArray<OP_Node *> *&ops,
                                       UT_ValArray<PRM_Parm *> *&parms,
                                       UT_IntArray *&vec_indices);
    static void          getParmsCacheBehaviour( bool &set_keys,
                                                 bool &do_scope,
                                                 bool &append_scope );

    // Save the name of the state being created.
    void                saveStateToCreate(char const* state);
public:
    static int           cacheParms();
    static void          appendToParmsCache(OP_Node *op, PRM_Parm *parm,
                                            int vi);
    static void          setParmsCacheBehaviour( bool set_keys, bool do_scope,
                                                 bool append_scope );

    static bool          getHideLockedHandleParts()
                            { return theHideLockedHandleParts; }
    static void          setHideLockedHandleParts( bool hide )
                            { theHideLockedHandleParts = hide; }
    static bool          getScopeChannelsOnKey()
                            { return theScopeChannelsOnKey; }
    static void          setScopeChannelsOnKey( bool scope )
                            { theScopeChannelsOnKey = scope; }
    static bool          getAddScopedChannels()
                            { return theAddScopedChannels; }
    static void          setAddScopedChannels( bool add )
                            { theAddScopedChannels = add; }
    static bool          getOpenChannelEditorOnScope()
                            { return theOpenChannelEditorOnScope; }
    static void          setOpenChannelEditorOnScope( bool do_open )
                            { theOpenChannelEditorOnScope = do_open; }
    static void          getChannelScopeCommandPrefix( UT_String &str );


protected:
    // Classes:

    class PI_API PI_OpPIKey
    {
    public:
        PI_OpPIKey(const char *pi_name_in_setting_table, const char *pi_type,
                   int op_id) :
           myPINameInSettingTable(pi_name_in_setting_table),
           myPIType(pi_type),
           myOpId(op_id) {}

        bool operator==(const PI_OpPIKey &o) const
        {
            // myPIType is not used.
            return myPINameInSettingTable == o.myPINameInSettingTable &&
                   myOpId == o.myOpId;
        }
        
        SYS_HashType hash() const
        {
            // myPIType is not used.
            SYS_HashType hash = myPINameInSettingTable.hash();
            SYShashCombine(hash, myOpId);
            return hash;
        }

        UT_StringHolder piNameInSettingTable() const { return myPINameInSettingTable; }
        UT_StringHolder piType() const { return myPIType; }
        int opId() const { return myOpId; }
        
        struct Hasher
        {
            size_t operator()(const PI_OpPIKey &pk) const { return size_t(pk.hash()); }
        };
        
    private:
        UT_StringHolder  myPINameInSettingTable;
        UT_StringHolder  myPIType;
        int              myOpId;
    };

    struct PI_API OpPISettingInfo
    {
        PI_SettingList  *mySettings;
        bool             myLoadedFromHip;
    };

    // Methods:

    void                 installCommands();
    void                 registerOpHandleLinks();
    void                 registerCopHandleLinks();
    void                 registerOpHandleConstructors();
    void                 registerSelectors();
    void                 registerSelectorConstructors();

    // Functions used by registerOpHandleLinks for loading the OPbindings file.
    bool                 isValidPiParmName( const UT_String &pi_name,
                                            const UT_String &pi_parm);
    void                 loadHandle(CPP_Manager &cppman, OP_Operator *op,
                                    pi_OpHandleBinding *binding);
    void                 loadSelector(CPP_Manager &cppman,
                                      const UT_String &selname,
                                      const UT_String &seldescription,
                                      pi_OpSelectorBinding *binding);
    void                 loadOperator(CPP_Manager &cppman,
                                      const UT_String &oppath);
    void                 loadOperator(CPP_Manager &cppman,
                                      const UT_String &optype,
                                      OP_Operator *op,
                                      pi_OpHandleBinding *hbinding,
                                      pi_OpSelectorBinding *sbinding);

    virtual void         addAutomaticStates(PI_NetworkType net_type);
    void                 tableUpdated(OP_OperatorTable *table) override;
    void                 tableDeleted(OP_OperatorTable *table) override;
    void                 templatesUpdated(OP_Operator *op) override;
    void                 operatorDeleted(OP_Operator *op) override;
    void                 ensureTableInterestExists(PI_NetworkType net_type,
                                                   OP_OperatorTable *table);

    PI_HandleTemplate   *getHandleTemplate(const char *handle_name) const;

    // Save all the PI settings to a stream.
    static OP_ERROR      savePIResourceManagerCallback(std::ostream &os, 
                                                       void *data);
    OP_ERROR             saveSettings(std::ostream &os) const;

    // We need the non-const version of getDefaultPISettings() because we
    // might need to sort the default settings.
    const PI_SettingList *getDefaultPISettings(OP_Operator &op_type,
                                               const char *type_name,
                                               const char *description) const;
          PI_SettingList *getDefaultPISettings(OP_Operator &op_type,
                                               const char *type_name,
                                               const char *description);

    // Clear and re-create the bindings if necessary
    void resetOpBindings(OP_Operator *op);

    // This method is implemented by the leaf class (i.e. MT_ResourceManager)
    // and is used for updating the PI Settings (i.e. handle settings) 
    // loaded from the PI setting tables (loadPISettingsFromTables). 
    // MT_ResourceManager uses the latest PI settings registered by a 
    // python state to update the loaded settings.

    // pi_settings: The PI settings to update. The implementation should
    //              update it directly and return the same pointer.  
    // op:          The owner operator.
    // pi_type:     The PI type name.
    // pi_name:     The PI description name.
    virtual PI_SettingList const * onUpdatePISettings(  PI_SettingList const&   pi_settings, 
                                                        OP_Operator &           op, 
                                                        char const*             pi_type, 
                                                        char const*             pi_name) const;

    // Data:
    using PI_SaveCallbackInfo = std::pair<PI_SaveCallback, void *>;
    UT_StringHolder                      myStateBeingCreated;
    UT_StringSet                         myStates;
    PI_HandleTemplateMap                 myHandles;
    PI_OpHandleLinkMap                   myOpHandleLinks;
    PI_SelectorTemplateMap               mySelectors;

    UT_SymbolMap<pi_OpHandleBinding *>   myOpHandleBindings;
    UT_SymbolMap<pi_OpSelectorBinding *> myOpSelectorBindings;

    UT_Map<PI_OpPIKey, OpPISettingInfo, PI_OpPIKey::Hasher> myPISettingsForOps;
    UT_StringMap<PI_SettingList *>       myLastPISettings;

    UT_ValArray<PI_StateTemplate *>      myStateLists[PI_NUM_VIEWER_TYPES]
                                                        [PI_NUM_NETWORK_TYPES];
    UT_SymbolMap<PI_NetworkType>         myNetworkTypeTable;

    UT_Array<PI_SaveCallbackInfo>        mySaveCallbacks;
    void*                                myCurrentPythonSupport = nullptr;

    static bool                          ourSetKeyOnParms;
    static bool                          ourScopeParmChannels;
    static bool                          ourAppendToScope;
    static int                           ourCacheParms;
    static UT_ValArray<OP_Node *>        ourParmNodes;
    static UT_ValArray<PRM_Parm *>       ourParms;
    static UT_IntArray                   ourParmVecIndices;

    static bool                          theHideLockedHandleParts;
    static bool                          theScopeChannelsOnKey;
    static bool                          theAddScopedChannels;
    static bool                          theOpenChannelEditorOnScope;
};

PI_API extern PI_ResourceManager        *PIgetResourceManager();
PI_API extern void      PIcreateResourceManager(bool verbose=true);
PI_API extern bool      PIresourceManagerExists();

#endif