add sync calls for tablet state on client

only adding fix for 1.12 thanks to player inventory change count

closes #2696

src/main/scala/li/cil/oc/client/PacketHandler.scala

@@ -12,6 +12,7 @@ import li.cil.oc.client.renderer.PetRenderer
 import li.cil.oc.common.Loot
 import li.cil.oc.common.PacketType
 import li.cil.oc.common.container
+import li.cil.oc.common.item.{Tablet, TabletWrapper}
 import li.cil.oc.common.nanomachines.ControllerImpl
 import li.cil.oc.common.tileentity._
 import li.cil.oc.common.tileentity.traits._
@@ -58,6 +59,7 @@ object PacketHandler extends CommonPacketHandler {
       case PacketType.ClientLog => onClientLog(p)
       case PacketType.Clipboard => onClipboard(p)
       case PacketType.ColorChange => onColorChange(p)
+      case PacketType.MachineItemStateResponse => onMachineItemStateResponse(p)
       case PacketType.ComputerState => onComputerState(p)
       case PacketType.ComputerUserList => onComputerUserList(p)
       case PacketType.ContainerUpdate => onContainerUpdate(p)
@@ -152,6 +154,15 @@ object PacketHandler extends CommonPacketHandler {
       case _ => // Invalid packet.
     }
 
+  def onMachineItemStateResponse(p: PacketParser) : Unit = {
+    val stack = p.readItemStack()
+    val running = p.readBoolean()
+    val wrapper = Tablet.Client.get(stack, p.player)
+
+    wrapper.data.isRunning = running
+    wrapper.isDirty = false
+  }
+
   def onComputerState(p: PacketParser): Unit =
     p.readTileEntity[Computer]() match {
       case Some(t) =>

src/main/scala/li/cil/oc/client/PacketSender.scala

@@ -9,10 +9,14 @@ import li.cil.oc.common.tileentity._
 import li.cil.oc.common.tileentity.traits.Computer
 import net.minecraft.client.Minecraft
 import net.minecraft.client.audio.PositionedSoundRecord
+import net.minecraft.entity.player.EntityPlayer
 import net.minecraft.init.SoundEvents
+import net.minecraft.item.ItemStack
 import net.minecraft.util.EnumFacing
 import net.minecraft.util.SoundCategory
 
+import scala.tools.nsc.doc.model.Entity
+
 object PacketSender {
   // Timestamp after which the next clipboard message may be sent. Used to
   // avoid spamming large packets on key repeat.
@@ -91,6 +95,14 @@ object PacketSender {
     }
   }
 
+  def sendMachineItemStateRequest(stack: ItemStack): Unit = {
+    val pb = new SimplePacketBuilder(PacketType.MachineItemStateRequest)
+
+    pb.writeItemStack(stack)
+
+    pb.sendToServer()
+  }
+
   def sendMouseClick(address: String, x: Double, y: Double, drag: Boolean, button: Int) {
     val pb = new SimplePacketBuilder(PacketType.MouseClickOrDrag)
 

src/main/scala/li/cil/oc/common/PacketType.scala

@@ -79,6 +79,8 @@ object PacketType extends Enumeration {
   KeyDown,
   KeyUp,
   Clipboard,
+  MachineItemStateRequest,
+  MachineItemStateResponse,
   MouseClickOrDrag,
   MouseScroll,
   MouseUp,

src/main/scala/li/cil/oc/common/item/Tablet.scala

@@ -21,6 +21,7 @@ import li.cil.oc.api.machine.MachineHost
 import li.cil.oc.api.network.Connector
 import li.cil.oc.api.network.Message
 import li.cil.oc.api.network.Node
+import li.cil.oc.{client, server}
 import li.cil.oc.client.KeyBindings
 import li.cil.oc.common.GuiType
 import li.cil.oc.common.Slot
@@ -28,7 +29,7 @@ import li.cil.oc.common.Tier
 import li.cil.oc.common.inventory.ComponentInventory
 import li.cil.oc.common.item.data.TabletData
 import li.cil.oc.integration.opencomputers.DriverScreen
-import li.cil.oc.server.component
+import li.cil.oc.server.{PacketSender, component}
 import li.cil.oc.util.Audio
 import li.cil.oc.util.BlockPosition
 import li.cil.oc.util.ExtendedNBT._
@@ -40,7 +41,7 @@ import net.minecraft.client.renderer.block.model.ModelBakery
 import net.minecraft.client.renderer.block.model.ModelResourceLocation
 import net.minecraft.entity.Entity
 import net.minecraft.entity.EntityLivingBase
-import net.minecraft.entity.player.EntityPlayer
+import net.minecraft.entity.player.{EntityPlayer, EntityPlayerMP}
 import net.minecraft.item.EnumRarity
 import net.minecraft.item.ItemStack
 import net.minecraft.nbt.NBTTagCompound
@@ -91,8 +92,10 @@ class Tablet(val parent: Delegator) extends traits.Delegate with CustomModel wit
 
   override def durability(stack: ItemStack): Double = {
     if (stack.hasTagCompound) {
-      val data = new TabletData()
-      data.load(stack.getTagCompound)
+      val data = Tablet.Client.getWeak(stack) match {
+        case Some(wrapper) => wrapper.data
+        case _ => new TabletData(stack)
+      }
       1 - data.energy / data.maxEnergy
     }
     else 1.0
@@ -111,10 +114,10 @@ class Tablet(val parent: Delegator) extends traits.Delegate with CustomModel wit
 
   @SideOnly(Side.CLIENT)
   override def getModelLocation(stack: ItemStack): ModelResourceLocation = {
-    if (stack.hasTagCompound)
-      modelLocationFromState(Some(new TabletData(stack).isRunning))
-    else
-      modelLocationFromState(None)
+    modelLocationFromState(Tablet.Client.getWeak(stack) match {
+      case Some(tablet: TabletWrapper) => Some(tablet.data.isRunning)
+      case _ => None
+    })
   }
 
   @SideOnly(Side.CLIENT)
@@ -242,12 +245,20 @@ class TabletWrapper(var stack: ItemStack, var player: EntityPlayer) extends Comp
 
   val tablet: component.Tablet = if (world.isRemote) null else new component.Tablet(this)
 
-  var autoSave = true
-
+  //// Client side only
   private var isInitialized = !world.isRemote
 
+  var timesChanged: Int = 0
+
+  var isDirty: Boolean = true
+  ////
+
+  // Server side only
   private var lastRunning = false
 
+  var autoSave = true
+  ////
+
   def isCreative: Boolean = data.tier == Tier.Four
 
   def items: Array[ItemStack] = data.items
@@ -414,6 +425,8 @@ class TabletWrapper(var stack: ItemStack, var player: EntityPlayer) extends Comp
           buffer.setMaximumColorDepth(api.internal.TextBuffer.ColorDepth.FourBit)
           buffer.setMaximumResolution(80, 25)
       }
+
+      client.PacketSender.sendMachineItemStateRequest(stack)
     }
     if (!world.isRemote) {
       if (isCreative && world.getTotalWorldTime % Settings.get.tickFrequency == 0) {
@@ -429,6 +442,11 @@ class TabletWrapper(var stack: ItemStack, var player: EntityPlayer) extends Comp
         lastRunning = machine.isRunning
         markDirty()
 
+        player match {
+          case mp: EntityPlayerMP => server.PacketSender.sendMachineItemState(mp, stack, machine.isRunning)
+          case _ =>
+        }
+
         if (machine.isRunning) {
           components collect {
             case Some(buffer: api.internal.TextBuffer) =>
@@ -520,6 +538,23 @@ object Tablet {
       cache.synchronized {
         currentStack = stack
         currentHolder = holder
+
+        // if the item is still cached, we can detect if it is dirty (client side only)
+        if (holder.world.isRemote) {
+          Client.getWeak(stack) match {
+            case Some(weak) =>
+              val timesChanged = holder.inventory.getTimesChanged
+              if (timesChanged != weak.timesChanged) {
+                if (!weak.isDirty) {
+                  weak.isDirty = true
+                  client.PacketSender.sendMachineItemStateRequest(stack)
+                }
+                weak.timesChanged = timesChanged
+              }
+            case _ =>
+          }
+        }
+
         var wrapper = cache.get(id, this)
 
         // Force re-load on world change, in case some components store a
@@ -532,6 +567,9 @@ object Tablet {
           wrapper = cache.get(id, this)
         }
 
+        currentStack = null
+        currentHolder = null
+
         wrapper.stack = stack
         wrapper.player = holder
         wrapper
@@ -552,6 +590,7 @@ object Tablet {
           node.remove()
         }
         if (tablet.autoSave) tablet.writeToNBT()
+        tablet.markDirty()
       }
     }
 
@@ -576,6 +615,15 @@ object Tablet {
   object Client extends Cache {
     override protected def timeout = 5
 
+    def getWeak(stack: ItemStack): Option[TabletWrapper] = {
+      val key = getId(stack)
+      val map = cache.asMap
+      if (map.containsKey(key))
+        Some(map.entrySet.find(entry => entry.getKey == key).get.getValue)
+      else
+        None
+    }
+
     def get(stack: ItemStack): Option[TabletWrapper] = {
       if (stack.hasTagCompound && stack.getTagCompound.hasKey(Settings.namespace + "tablet")) {
         val id = stack.getTagCompound.getString(Settings.namespace + "tablet")

src/main/scala/li/cil/oc/server/PacketHandler.scala

@@ -4,11 +4,12 @@ import li.cil.oc.Localization
 import li.cil.oc.api
 import li.cil.oc.api.internal.Server
 import li.cil.oc.api.machine.Machine
+import li.cil.oc.api.network.Connector
 import li.cil.oc.common.Achievement
 import li.cil.oc.common.PacketType
 import li.cil.oc.common.component.TextBuffer
 import li.cil.oc.common.entity.Drone
-import li.cil.oc.common.item.Delegator
+import li.cil.oc.common.item.{Delegator, Tablet, TabletWrapper}
 import li.cil.oc.common.item.data.DriveData
 import li.cil.oc.common.item.traits.FileSystemLike
 import li.cil.oc.common.tileentity._
@@ -41,6 +42,7 @@ object PacketHandler extends CommonPacketHandler {
       case PacketType.KeyDown => onKeyDown(p)
       case PacketType.KeyUp => onKeyUp(p)
       case PacketType.Clipboard => onClipboard(p)
+      case PacketType.MachineItemStateRequest => onMachineItemStateRequest(p)
       case PacketType.MouseClickOrDrag => onMouseClick(p)
       case PacketType.MouseScroll => onMouseScroll(p)
       case PacketType.MouseUp => onMouseUp(p)
@@ -265,6 +267,14 @@ object PacketHandler extends CommonPacketHandler {
       case _ => // Invalid packet.
     }
 
+  def onMachineItemStateRequest(p: PacketParser): Unit = p.player match {
+    case player: EntityPlayerMP => {
+      val stack = p.readItemStack()
+      PacketSender.sendMachineItemState(player, stack, Tablet.get(stack, p.player).machine.isRunning)
+    }
+    case _ => // ignore
+  }
+
   def onTextBufferInit(p: PacketParser) {
     val address = p.readUTF()
     p.player match {

src/main/scala/li/cil/oc/server/PacketSender.scala

@@ -90,6 +90,15 @@ object PacketSender {
     pb.sendToPlayersNearTileEntity(t)
   }
 
+  def sendMachineItemState(player: EntityPlayerMP, stack: ItemStack, isRunning: Boolean): Unit = {
+    val pb = new SimplePacketBuilder(PacketType.MachineItemStateResponse)
+
+    pb.writeItemStack(stack)
+    pb.writeBoolean(isRunning)
+
+    pb.sendToPlayer(player)
+  }
+
   def sendComputerUserList(t: Computer, list: Array[String]) {
     val pb = new SimplePacketBuilder(PacketType.ComputerUserList)