standard.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef MTROPOLIS_PLUGIN_STANDARD_H
#define MTROPOLIS_PLUGIN_STANDARD_H

#include "mtropolis/modifiers.h"
#include "mtropolis/modifier_factory.h"
#include "mtropolis/runtime.h"
#include "mtropolis/plugin/standard_data.h"

namespace MTropolis {

class Runtime;

namespace Standard {

class StandardPlugIn;

class CursorModifier : public Modifier {
public:
    CursorModifier();

    bool load(const PlugInModifierLoaderContext &context, const Data::Standard::CursorModifier &data);

    bool respondsToEvent(const Event &evt) const override;
    VThreadState consumeMessage(Runtime *runtime, const Common::SharedPtr<MessageProperties> &msg) override;
    void disable(Runtime *runtime) override;

#ifdef MTROPOLIS_DEBUG_ENABLE
    const char *debugGetTypeName() const override { return "Cursor Modifier"; }
    SupportStatus debugGetSupportStatus() const override { return kSupportStatusDone; }
#endif

private:
    Common::SharedPtr<Modifier> shallowClone() const override;
    const char *getDefaultName() const override;

    Event _applyWhen;
    Event _removeWhen;
    uint32 _cursorID;
};

// This appears to be basically a duplicate of scene transition modifier, except unlike that,
// its parameters are controllable via script, and the duration scaling appears to be different
// (probably 600000 max rate instead of 6000000)
class STransCtModifier : public Modifier {
public:
    static const int32 kMaxDuration = 600000;

    STransCtModifier();

    bool load(const PlugInModifierLoaderContext &context, const Data::Standard::STransCtModifier &data);

    bool respondsToEvent(const Event &evt) const override;
    VThreadState consumeMessage(Runtime *runtime, const Common::SharedPtr<MessageProperties> &msg) override;
    void disable(Runtime *runtime) override;

    bool readAttribute(MiniscriptThread *thread, DynamicValue &result, const Common::String &attrib) override;
    MiniscriptInstructionOutcome writeRefAttribute(MiniscriptThread *thread, DynamicValueWriteProxy &result, const Common::String &attrib) override;

#ifdef MTROPOLIS_DEBUG_ENABLE
    const char *debugGetTypeName() const override { return "STransCt Scene Transition Modifier"; }
    SupportStatus debugGetSupportStatus() const override { return kSupportStatusDone; }
#endif

private:
    Common::SharedPtr<Modifier> shallowClone() const override;
    const char *getDefaultName() const override;

    MiniscriptInstructionOutcome scriptSetRate(MiniscriptThread *thread, const DynamicValue &value);
    MiniscriptInstructionOutcome scriptSetSteps(MiniscriptThread *thread, const DynamicValue &value);

    Event _enableWhen;
    Event _disableWhen;

    int32 _transitionType;
    int32 _transitionDirection;
    int32 _steps;
    int32 _duration;
    bool _fullScreen;
};

class MediaCueMessengerModifier : public Modifier, public IMediaCueModifier {
public:
    MediaCueMessengerModifier();
    ~MediaCueMessengerModifier();

    bool load(const PlugInModifierLoaderContext &context, const Data::Standard::MediaCueMessengerModifier &data);

    bool respondsToEvent(const Event &evt) const override;
    VThreadState consumeMessage(Runtime *runtime, const Common::SharedPtr<MessageProperties> &msg) override;
    void disable(Runtime *runtime) override;

    Modifier *getMediaCueModifier() override;
    Common::WeakPtr<Modifier> getMediaCueTriggerSource() const override;

#ifdef MTROPOLIS_DEBUG_ENABLE
    const char *debugGetTypeName() const override { return "Media Cue Modifier"; }
    SupportStatus debugGetSupportStatus() const override { return kSupportStatusDone; }
#endif

private:
    enum CueSourceType {
        kCueSourceInteger,
        kCueSourceIntegerRange,
        kCueSourceVariableReference,
        kCueSourceLabel,
        kCueSourceString,

        kCueSourceInvalid = -1,
    };

    union CueSourceUnion {
        CueSourceUnion();
        ~CueSourceUnion();

        int32 asInt;
        IntRange asIntRange;
        uint32 asVarRefGUID;
        Label asLabel;
        uint64 asUnset;
        Common::String asString;

        template<class T, T (CueSourceUnion::*TMember)>
        void construct(const T &value);

        template<class T, T(CueSourceUnion::*TMember)>
        void destruct();
    };

    MediaCueMessengerModifier(const MediaCueMessengerModifier &other);

    Common::SharedPtr<Modifier> shallowClone() const override;
    const char *getDefaultName() const override;

    void linkInternalReferences(ObjectLinkingScope *scope) override;
    void visitInternalReferences(IStructuralReferenceVisitor *visitor) override;

    CueSourceType _cueSourceType;
    CueSourceUnion _cueSource;

    Common::WeakPtr<Modifier> _cueSourceModifier;

    Event _enableWhen;
    Event _disableWhen;

    MediaCueState _mediaCue;
    bool _isActive;
};

class ObjectReferenceVariableModifier : public VariableModifier {
public:
    ObjectReferenceVariableModifier();

    bool load(const PlugInModifierLoaderContext &context, const Data::Standard::ObjectReferenceVariableModifier &data);

    bool varSetValue(MiniscriptThread *thread, const DynamicValue &value) override;
    void varGetValue(DynamicValue &dest) const override;

    bool readAttribute(MiniscriptThread *thread, DynamicValue &result, const Common::String &attrib) override;
    MiniscriptInstructionOutcome writeRefAttribute(MiniscriptThread *thread, DynamicValueWriteProxy &result, const Common::String &attrib) override;

#ifdef MTROPOLIS_DEBUG_ENABLE
    const char *debugGetTypeName() const override { return "Object Reference Variable Modifier"; }
    SupportStatus debugGetSupportStatus() const override { return kSupportStatusDone; }
    void debugInspect(IDebugInspectionReport *report) const override;
#endif

private:
    struct ObjectWriteInterface {
        static MiniscriptInstructionOutcome write(MiniscriptThread *thread, const DynamicValue &dest, void *objectRef, uintptr ptrOrOffset);
        static MiniscriptInstructionOutcome refAttrib(MiniscriptThread *thread, DynamicValueWriteProxy &proxy, void *objectRef, uintptr ptrOrOffset, const Common::String &attrib);
        static MiniscriptInstructionOutcome refAttribIndexed(MiniscriptThread *thread, DynamicValueWriteProxy &proxy, void *objectRef, uintptr ptrOrOffset, const Common::String &attrib, const DynamicValue &index);
    };

    Common::SharedPtr<Modifier> shallowClone() const override;
    const char *getDefaultName() const override;

    MiniscriptInstructionOutcome scriptSetPath(MiniscriptThread *thread, const DynamicValue &value);
    MiniscriptInstructionOutcome scriptSetObject(MiniscriptThread *thread, const DynamicValue &value);
    MiniscriptInstructionOutcome scriptObjectRefAttrib(MiniscriptThread *thread, DynamicValueWriteProxy &proxy, const Common::String &attrib);
    MiniscriptInstructionOutcome scriptObjectRefAttribIndexed(MiniscriptThread *thread, DynamicValueWriteProxy &proxy, const Common::String &attrib, const DynamicValue &index);

    void resolve(Runtime *runtime);
    void resolveRelativePath(Runtime *runtime, RuntimeObject *obj, const Common::String &path, size_t startPos);
    void resolveAbsolutePath(Runtime *runtime);

    static bool computeObjectPath(RuntimeObject *obj, Common::String &outPath);
    static RuntimeObject *getObjectParent(RuntimeObject *obj);

    Event _setToSourceParentWhen;
};

class ObjectReferenceVariableStorage : public VariableStorage {
public:
    friend class ObjectReferenceVariableModifier;

    ObjectReferenceVariableStorage();

    Common::SharedPtr<ModifierSaveLoad> getSaveLoad(Runtime *runtime) override;

    Common::SharedPtr<VariableStorage> clone() const override;

private:
    class SaveLoad : public ModifierSaveLoad {
    public:
        explicit SaveLoad(ObjectReferenceVariableStorage *storage);

    private:
        void commitLoad() const override;
        void saveInternal(Common::WriteStream *stream) const override;
        bool loadInternal(Common::ReadStream *stream, uint32 saveFileVersion) override;

        ObjectReferenceVariableStorage *_storage;
        Common::String _objectPath;
    };

    Common::String _fullPath;
    Common::String _objectPath;
    mutable ObjectReference _object;
};

class ListVariableStorage : public VariableStorage {
public:
    friend class ListVariableModifier;

    ListVariableStorage();

    Common::SharedPtr<ModifierSaveLoad> getSaveLoad(Runtime *runtime) override;

    Common::SharedPtr<VariableStorage> clone() const override;

private:
    class SaveLoad : public ModifierSaveLoad {
    public:
        explicit SaveLoad(ListVariableStorage *storage);

    private:
        void commitLoad() const override;
        void saveInternal(Common::WriteStream *stream) const override;
        bool loadInternal(Common::ReadStream *stream, uint32 saveFileVersion) override;

        static void recursiveWriteList(DynamicList *list, Common::WriteStream *stream);
        static Common::SharedPtr<DynamicList> recursiveReadList(Common::ReadStream *stream);

        ListVariableStorage *_storage;
        Common::SharedPtr<DynamicList> _list;
    };

    Common::SharedPtr<DynamicList> _list;
    DynamicValueTypes::DynamicValueType _preferredContentType;
};

class ListVariableModifier : public VariableModifier {
public:
    ListVariableModifier();

    bool load(const PlugInModifierLoaderContext &context, const Data::Standard::ListVariableModifier &data);

    bool varSetValue(MiniscriptThread *thread, const DynamicValue &value) override;
    void varGetValue(DynamicValue &dest) const override;

    bool isListVariable() const override;

    bool readAttribute(MiniscriptThread *thread, DynamicValue &result, const Common::String &attrib) override;
    bool readAttributeIndexed(MiniscriptThread *thread, DynamicValue &result, const Common::String &attrib, const DynamicValue &index) override;
    MiniscriptInstructionOutcome writeRefAttribute(MiniscriptThread *thread, DynamicValueWriteProxy &writeProxy, const Common::String &attrib) override;
    MiniscriptInstructionOutcome writeRefAttributeIndexed(MiniscriptThread *thread, DynamicValueWriteProxy &writeProxy, const Common::String &attrib, const DynamicValue &index) override;

#ifdef MTROPOLIS_DEBUG_ENABLE
    const char *debugGetTypeName() const override { return "List Variable Modifier"; }
    SupportStatus debugGetSupportStatus() const override { return kSupportStatusDone; }
    void debugInspect(IDebugInspectionReport *report) const override;
#endif

private:
    MiniscriptInstructionOutcome scriptSetCount(MiniscriptThread *thread, const DynamicValue &value);

    Common::SharedPtr<Modifier> shallowClone() const override;
    const char *getDefaultName() const override;
};

class SysInfoModifier : public Modifier {
public:
    bool load(const PlugInModifierLoaderContext &context, const Data::Standard::SysInfoModifier &data);

    bool readAttribute(MiniscriptThread *thread, DynamicValue &result, const Common::String &attrib) override;

    void disable(Runtime *runtime) override {}

#ifdef MTROPOLIS_DEBUG_ENABLE
    const char *debugGetTypeName() const override { return "System Info Modifier"; }
#endif

private:
    Common::SharedPtr<Modifier> shallowClone() const override;
    const char *getDefaultName() const override;
};

struct StandardPlugInHacks {
    StandardPlugInHacks();

    // If list mod values are illegible, just ignore them and flag it as garbled.
    // Necessary to load object 00788ab9 (olL437Check) in Obsidian, which is supposed to be a list of
    // 4 lists that are 3-size each, in the persistent data, but actually contains 4 identical values
    // that appear to be garbage.
    bool allowGarbledListModData;
};

class PanningModifier : public Modifier {
public:
    PanningModifier();
    ~PanningModifier();

    bool load(const PlugInModifierLoaderContext &context, const Data::Standard::PanningModifier &data);

    bool respondsToEvent(const Event &evt) const override;
    VThreadState consumeMessage(Runtime *runtime, const Common::SharedPtr<MessageProperties> &msg) override;

    void disable(Runtime *runtime) override;

#ifdef MTROPOLIS_DEBUG_ENABLE
    const char *debugGetTypeName() const override { return "Panning Modifier"; }
    void debugInspect(IDebugInspectionReport *report) const override;
#endif

private:
    Common::SharedPtr<Modifier> shallowClone() const override;
    const char *getDefaultName() const override;
};

class FadeModifier : public Modifier {
public:
    FadeModifier();
    ~FadeModifier();

    bool load(const PlugInModifierLoaderContext &context, const Data::Standard::FadeModifier &data);

    void disable(Runtime *runtime) override;

#ifdef MTROPOLIS_DEBUG_ENABLE
    const char *debugGetTypeName() const override { return "Fade Modifier"; }
#endif

private:
    Common::SharedPtr<Modifier> shallowClone() const override;
    const char *getDefaultName() const override;
};


class StandardPlugIn : public MTropolis::PlugIn {
public:
    StandardPlugIn();
    ~StandardPlugIn();

    void registerModifiers(IPlugInModifierRegistrar *registrar) const override;

    const StandardPlugInHacks &getHacks() const;
    StandardPlugInHacks &getHacks();

private:
    PlugInModifierFactory<CursorModifier, Data::Standard::CursorModifier> _cursorModifierFactory;
    PlugInModifierFactory<STransCtModifier, Data::Standard::STransCtModifier> _sTransCtModifierFactory;
    PlugInModifierFactory<MediaCueMessengerModifier, Data::Standard::MediaCueMessengerModifier> _mediaCueModifierFactory;
    PlugInModifierFactory<ObjectReferenceVariableModifier, Data::Standard::ObjectReferenceVariableModifier> _objRefVarModifierFactory;
    PlugInModifierFactory<ListVariableModifier, Data::Standard::ListVariableModifier> _listVarModifierFactory;
    PlugInModifierFactory<SysInfoModifier, Data::Standard::SysInfoModifier> _sysInfoModifierFactory;
    PlugInModifierFactory<PanningModifier, Data::Standard::PanningModifier> _panningModifierFactory;
    PlugInModifierFactory<FadeModifier, Data::Standard::FadeModifier> _fadeModifierFactory;

    StandardPlugInHacks _hacks;
};

} // End of namespace Standard

} // End of namespace MTropolis

#endif