Move several methods out of the proxy

Some methods act the same on both sides, and so can be in utility
classes. Others are only needed on one side, and so do not really need
to be part of the proxy.

 - Remove TurtleVisionCamera. It would be possible to add this back in
   the future, but for now it is unused and so should be removed.
 - Move frame info (cursor blink, current render frame) into a
   FrameInfo class.
 - Move record methods (name, playing a record) into a RecordUtil class.

src/main/java/dan200/computercraft/client/proxy/ComputerCraftProxyClient.java

@@ -7,6 +7,7 @@
 package dan200.computercraft.client.proxy;
 
 import dan200.computercraft.ComputerCraft;
+import dan200.computercraft.client.FrameInfo;
 import dan200.computercraft.client.gui.*;
 import dan200.computercraft.client.render.*;
 import dan200.computercraft.shared.command.CommandCopy;
@@ -28,7 +29,6 @@ import dan200.computercraft.shared.pocket.inventory.ContainerPocketComputer;
 import dan200.computercraft.shared.pocket.items.ItemPocketComputer;
 import dan200.computercraft.shared.proxy.ComputerCraftProxyCommon;
 import dan200.computercraft.shared.turtle.blocks.TileTurtle;
-import dan200.computercraft.shared.turtle.entity.TurtleVisionCamera;
 import dan200.computercraft.shared.util.Colour;
 import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap;
 import net.minecraft.block.Block;
@@ -52,15 +52,11 @@ import net.minecraft.util.text.ITextComponent;
 import net.minecraft.world.World;
 import net.minecraftforge.client.ClientCommandHandler;
 import net.minecraftforge.client.event.ModelRegistryEvent;
-import net.minecraftforge.client.event.RenderGameOverlayEvent;
-import net.minecraftforge.client.event.RenderHandEvent;
-import net.minecraftforge.client.event.RenderPlayerEvent;
 import net.minecraftforge.client.model.ModelLoader;
 import net.minecraftforge.common.MinecraftForge;
 import net.minecraftforge.event.world.WorldEvent;
 import net.minecraftforge.fml.client.registry.ClientRegistry;
 import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
-import net.minecraftforge.fml.common.gameevent.TickEvent;
 import net.minecraftforge.fml.relauncher.Side;
 import net.minecraftforge.fml.relauncher.SideOnly;
 
@@ -73,18 +69,12 @@ public class ComputerCraftProxyClient extends ComputerCraftProxyCommon
 {
     private static Int2IntOpenHashMap lastCounts = new Int2IntOpenHashMap();
 
-    private long m_tick;
-    private long m_renderFrame;
-    private FixedWidthFontRenderer m_fixedWidthFontRenderer;
-
     // IComputerCraftProxy implementation
 
     @Override
     public void preInit()
     {
         super.preInit();
-        m_tick = 0;
-        m_renderFrame = 0;
 
         // Setup client forge handlers
         registerForgeHandlers();
@@ -126,7 +116,6 @@ public class ComputerCraftProxyClient extends ComputerCraftProxyCommon
 
         // Load textures
         Minecraft mc = Minecraft.getMinecraft();
-        m_fixedWidthFontRenderer = new FixedWidthFontRenderer( mc.getTextureManager() );
 
         // Setup
         mc.getItemColors().registerItemColorHandler( new DiskColorHandler( ComputerCraft.Items.disk ), ComputerCraft.Items.disk );
@@ -191,45 +180,6 @@ public class ComputerCraftProxyClient extends ComputerCraftProxyCommon
         } );
     }
 
-    @Override
-    public boolean isClient()
-    {
-        return true;
-    }
-
-    @Override
-    public boolean getGlobalCursorBlink()
-    {
-        return (m_tick / 8) % 2 == 0;
-    }
-
-    @Override
-    public long getRenderFrame()
-    {
-        return m_renderFrame;
-    }
-
-    @Override
-    public Object getFixedWidthFontRenderer()
-    {
-        return m_fixedWidthFontRenderer;
-    }
-
-    @Override
-    public String getRecordInfo( @Nonnull ItemStack recordStack )
-    {
-        List<String> info = new ArrayList<>( 1 );
-        recordStack.getItem().addInformation( recordStack, null, info, ITooltipFlag.TooltipFlags.NORMAL );
-        if( info.size() > 0 )
-        {
-            return info.get( 0 );
-        }
-        else
-        {
-            return super.getRecordInfo( recordStack );
-        }
-    }
-
     @Override
     public Object getDiskDriveGUI( InventoryPlayer inventory, TileDiskDrive drive )
     {
@@ -402,98 +352,15 @@ public class ComputerCraftProxyClient extends ComputerCraftProxyCommon
 
     private void registerForgeHandlers()
     {
-        ForgeHandlers handlers = new ForgeHandlers();
-        MinecraftForge.EVENT_BUS.register( handlers );
+        MinecraftForge.EVENT_BUS.register( new ForgeHandlers() );
         MinecraftForge.EVENT_BUS.register( new RenderOverlayCable() );
         MinecraftForge.EVENT_BUS.register( new ItemPocketRenderer() );
         MinecraftForge.EVENT_BUS.register( new ItemPrintoutRenderer() );
+        MinecraftForge.EVENT_BUS.register( FrameInfo.instance() );
     }
 
     public class ForgeHandlers
     {
-        public ForgeHandlers()
-        {
-        }
-
-        @SubscribeEvent
-        public void onRenderHand( RenderHandEvent event )
-        {
-            // Don't draw the player arm when in turtle vision
-            Minecraft mc = Minecraft.getMinecraft();
-            if( mc.getRenderViewEntity() instanceof TurtleVisionCamera )
-            {
-                event.setCanceled( true );
-            }
-        }
-
-        @SubscribeEvent
-        public void onRenderPlayer( RenderPlayerEvent.Pre event )
-        {
-            Minecraft mc = Minecraft.getMinecraft();
-            if( event.getEntityPlayer().isUser() && mc.getRenderViewEntity() instanceof TurtleVisionCamera )
-            {
-                // HACK: Force the 'livingPlayer' variable to the player, this ensures the entity is drawn
-                //event.getRenderer().getRenderManager().livingPlayer = event.getEntityPlayer();
-            }
-        }
-
-        @SubscribeEvent
-        public void onRenderPlayer( RenderPlayerEvent.Post event )
-        {
-            Minecraft mc = Minecraft.getMinecraft();
-            if( event.getEntityPlayer().isUser() && mc.getRenderViewEntity() instanceof TurtleVisionCamera )
-            {
-                // HACK: Restore the 'livingPlayer' variable to what it was before the RenderPlayerEvent.Pre hack
-                //event.getRenderer().getRenderManager().livingPlayer = mc.getRenderViewEntity();
-            }
-        }
-
-        @SubscribeEvent
-        public void onPreRenderGameOverlay( RenderGameOverlayEvent.Pre event )
-        {
-            Minecraft mc = Minecraft.getMinecraft();
-            if( mc.getRenderViewEntity() instanceof TurtleVisionCamera )
-            {
-                switch( event.getType() )
-                {
-                    case HELMET:
-                    case PORTAL:
-                        //case CROSSHAIRS:
-                    case BOSSHEALTH:
-                    case ARMOR:
-                    case HEALTH:
-                    case FOOD:
-                    case AIR:
-                    case HOTBAR:
-                    case EXPERIENCE:
-                    case HEALTHMOUNT:
-                    case JUMPBAR:
-                    {
-                        event.setCanceled( true );
-                        break;
-                    }
-                }
-            }
-        }
-
-        @SubscribeEvent
-        public void onTick( TickEvent.ClientTickEvent event )
-        {
-            if( event.phase == TickEvent.Phase.START )
-            {
-                m_tick++;
-            }
-        }
-
-        @SubscribeEvent
-        public void onRenderTick( TickEvent.RenderTickEvent event )
-        {
-            if( event.phase == TickEvent.Phase.START )
-            {
-                m_renderFrame++;
-            }
-        }
-
         @SubscribeEvent
         public void onWorldUnload( WorldEvent.Unload event )
         {