Quill/PlayerCapabilities.cpp at main · noexcept2005/Quill · GitHub

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#include "PlayerCapabilities.h"
#include "Entity.h"

jclass playerCapabilitiesClass = NULL;
jmethodID playerCapabilitiesConstructorMethod = nullptr;

jfieldID capabilitiesField = nullptr;
jfieldID isFlyingField = nullptr;
jfieldID allowFlyingField = nullptr;

jclass CPlayerCapabilities::getClass()
{   // net/minecraft/entity/player/PlayerCapabilities
    if (playerCapabilitiesClass == NULL)
        playerCapabilitiesClass = ct.env->FindClass("wl");

    return playerCapabilitiesClass;
}

jobject CPlayerCapabilities::getInstance()
{   // mc.thePlayer.capabilities
    if (capabilitiesField == nullptr)
        capabilitiesField = ct.env->GetFieldID(CEntityPlayer::getEntityPlayerClass(),"bA","Lwl;");

    jobject obj = ct.env->GetObjectField(CEntityPlayer::getEntityPlayerSPInstance(),
        capabilitiesField);

    return obj;
}

jobject CPlayerCapabilities::newFlyingInstance(bool flying, bool allowFlying)
{
    if (playerCapabilitiesConstructorMethod == nullptr)
        playerCapabilitiesConstructorMethod = ct.env->GetMethodID(getClass(), "<init>", "()V");

    if (isFlyingField == nullptr)
        isFlyingField = ct.env->GetFieldID(getClass(), "b", "Z");

    if (allowFlyingField == nullptr)
        allowFlyingField = ct.env->GetFieldID(getClass(), "c", "Z");

    jobject obj = ct.env->NewObject(getClass(), playerCapabilitiesConstructorMethod);

    ct.env->SetBooleanField(obj, isFlyingField, (jboolean)flying);
    ct.env->SetBooleanField(obj, allowFlyingField, (jboolean)allowFlying);

    return obj;
}

void CPlayerCapabilities::setFlying(jobject instance,bool flying)
{
    if(isFlyingField == nullptr)
        isFlyingField = ct.env->GetFieldID(getClass(),"b","Z");

    ct.env->SetBooleanField(instance, isFlyingField, (jboolean)flying);
}

void CPlayerCapabilities::setAllowFlying(jobject instance,bool allowFlying)
{
    if(allowFlyingField == nullptr)
        allowFlyingField = ct.env->GetFieldID(getClass(),"c","Z");

    ct.env->SetBooleanField(instance, allowFlyingField, (jboolean)allowFlying);
}

bool CPlayerCapabilities::isFlying()
{
    if (isFlyingField == nullptr)
        isFlyingField = ct.env->GetFieldID(getClass(), "b", "Z");

    return ct.env->GetBooleanField(getInstance(),isFlyingField);
}

bool CPlayerCapabilities::isAllowFlying()
{
    if (allowFlyingField == nullptr)
        allowFlyingField = ct.env->GetFieldID(getClass(), "c", "Z");

    return ct.env->GetBooleanField(getInstance(), allowFlyingField);
}