second attempt at backfill

src/api/java/baritone/api/Settings.java

@@ -398,6 +398,11 @@ public final class Settings {
      */
     public final Setting<Boolean> containerMemory = new Setting<>(false);
 
+    /**
+     * Fill in blocks behind you
+     */
+    public final Setting<Boolean> backfill = new Setting<>(false);
+
     /**
      * Print all the debug messages to chat
      */

src/main/java/baritone/Baritone.java

@@ -80,6 +80,7 @@ public class Baritone implements IBaritone {
     private CustomGoalProcess customGoalProcess;
     private BuilderProcess builderProcess;
     private ExploreProcess exploreProcess;
+    private BackfillProcess backfillProcess;
 
     private PathingControlManager pathingControlManager;
 
@@ -120,6 +121,7 @@ public class Baritone implements IBaritone {
             getToBlockProcess = new GetToBlockProcess(this);
             builderProcess = new BuilderProcess(this);
             exploreProcess = new ExploreProcess(this);
+            backfillProcess = new BackfillProcess(this);
         }
 
         this.worldProvider = new WorldProvider();

src/main/java/baritone/behavior/InventoryBehavior.java

@@ -130,13 +130,13 @@ public class InventoryBehavior extends Behavior {
         return false;
     }
 
-    public boolean selectThrowawayForLocation(int x, int y, int z) {
+    public boolean selectThrowawayForLocation(boolean select, int x, int y, int z) {
         IBlockState maybe = baritone.getBuilderProcess().placeAt(x, y, z);
-        if (maybe != null && throwaway(true, item -> item instanceof ItemBlock && ((ItemBlock) item).getBlock().equals(maybe.getBlock()))) {
+        if (maybe != null && throwaway(select, item -> item instanceof ItemBlock && ((ItemBlock) item).getBlock().equals(maybe.getBlock()))) {
             return true; // gotem
         }
         for (Item item : Baritone.settings().acceptableThrowawayItems.value) {
-            if (throwaway(true, item::equals)) {
+            if (throwaway(select, item::equals)) {
                 return true;
             }
         }

src/main/java/baritone/pathing/movement/Movement.java

@@ -270,4 +270,8 @@ public abstract class Movement implements IMovement, MovementHelper {
         }
         return toWalkIntoCached;
     }
+
+    public BlockPos[] toBreakAll() {
+        return positionsToBreak;
+    }
 }

src/main/java/baritone/pathing/movement/MovementHelper.java

@@ -478,8 +478,8 @@ public interface MovementHelper extends ActionCosts, Helper {
         for (int i = 0; i < 5; i++) {
             BlockPos against1 = placeAt.offset(HORIZONTALS_BUT_ALSO_DOWN____SO_EVERY_DIRECTION_EXCEPT_UP[i]);
             if (MovementHelper.canPlaceAgainst(ctx, against1)) {
-                if (!((Baritone) baritone).getInventoryBehavior().selectThrowawayForLocation(placeAt.getX(), placeAt.getY(), placeAt.getZ())) { // get ready to place a throwaway block
-                    Helper.HELPER.logDebug("bb pls get me some blocks. dirt or cobble");
+                if (!((Baritone) baritone).getInventoryBehavior().selectThrowawayForLocation(false, placeAt.getX(), placeAt.getY(), placeAt.getZ())) { // get ready to place a throwaway block
+                    Helper.HELPER.logDebug("bb pls get me some blocks. dirt, netherrack, cobble");
                     state.setStatus(MovementStatus.UNREACHABLE);
                     return PlaceResult.NO_OPTION;
                 }
@@ -505,10 +505,15 @@ public interface MovementHelper extends ActionCosts, Helper {
             EnumFacing side = ctx.objectMouseOver().sideHit;
             // only way for selectedBlock.equals(placeAt) to be true is if it's replacable
             if (selectedBlock.equals(placeAt) || (MovementHelper.canPlaceAgainst(ctx, selectedBlock) && selectedBlock.offset(side).equals(placeAt))) {
+                ((Baritone) baritone).getInventoryBehavior().selectThrowawayForLocation(true, placeAt.getX(), placeAt.getY(), placeAt.getZ());
                 return PlaceResult.READY_TO_PLACE;
             }
         }
-        return found ? PlaceResult.ATTEMPTING : PlaceResult.NO_OPTION;
+        if (found) {
+            ((Baritone) baritone).getInventoryBehavior().selectThrowawayForLocation(true, placeAt.getX(), placeAt.getY(), placeAt.getZ());
+            return PlaceResult.ATTEMPTING;
+        }
+        return PlaceResult.NO_OPTION;
     }
 
     enum PlaceResult {

src/main/java/baritone/pathing/movement/movements/MovementPillar.java

@@ -208,7 +208,7 @@ public class MovementPillar extends Movement {
             return state;
         } else {
             // Get ready to place a throwaway block
-            if (!((Baritone) baritone).getInventoryBehavior().selectThrowawayForLocation(src.x, src.y, src.z)) {
+            if (!((Baritone) baritone).getInventoryBehavior().selectThrowawayForLocation(true, src.x, src.y, src.z)) {
                 return state.setStatus(MovementStatus.UNREACHABLE);
             }
 

src/main/java/baritone/process/BackfillProcess.java

@@ -0,0 +1,136 @@
+/*
+ * This file is part of Baritone.
+ *
+ * Baritone is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Baritone 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Baritone.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package baritone.process;
+
+import baritone.Baritone;
+import baritone.api.process.PathingCommand;
+import baritone.api.process.PathingCommandType;
+import baritone.api.utils.input.Input;
+import baritone.pathing.movement.Movement;
+import baritone.pathing.movement.MovementHelper;
+import baritone.pathing.movement.MovementState;
+import baritone.pathing.path.PathExecutor;
+import baritone.utils.BaritoneProcessHelper;
+import net.minecraft.block.state.IBlockState;
+import net.minecraft.init.Blocks;
+import net.minecraft.util.EnumFacing;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.chunk.EmptyChunk;
+
+import java.util.*;
+import java.util.stream.Collectors;
+
+public class BackfillProcess extends BaritoneProcessHelper {
+
+    public HashMap<BlockPos, IBlockState> blocksToReplace = new HashMap<>();
+
+    public BackfillProcess(Baritone baritone) {
+        super(baritone);
+    }
+
+    @Override
+    public boolean isActive() {
+        if (!Baritone.settings().backfill.value) {
+            return false;
+        }
+        if (Baritone.settings().allowParkour.value) {
+            logDirect("Backfill cannot be used with allowParkour true");
+            Baritone.settings().backfill.value = false;
+            return false;
+        }
+        amIBreakingABlockHMMMMMMM();
+        for (BlockPos pos : new ArrayList<>(blocksToReplace.keySet())) {
+            if (ctx.world().getChunk(pos) instanceof EmptyChunk) {
+                blocksToReplace.remove(pos);
+            }
+        }
+        baritone.getInputOverrideHandler().clearAllKeys();
+
+        return !toFillIn().isEmpty();
+    }
+
+    @Override
+    public PathingCommand onTick(boolean calcFailed, boolean isSafeToCancel) {
+        if (!isSafeToCancel) {
+            return new PathingCommand(null, PathingCommandType.REQUEST_PAUSE);
+        }
+        baritone.getInputOverrideHandler().clearAllKeys();
+        for (BlockPos toPlace : toFillIn()) {
+            MovementState fake = new MovementState();
+            switch (MovementHelper.attemptToPlaceABlock(fake, baritone, toPlace, false)) {
+                case NO_OPTION:
+                    continue;
+                case READY_TO_PLACE:
+                    baritone.getInputOverrideHandler().setInputForceState(Input.CLICK_RIGHT, true);
+                    return new PathingCommand(null, PathingCommandType.REQUEST_PAUSE);
+                case ATTEMPTING:
+                    // patience
+                    baritone.getLookBehavior().updateTarget(fake.getTarget().getRotation().get(), true);
+                    return new PathingCommand(null, PathingCommandType.REQUEST_PAUSE);
+            }
+        }
+        return null; // cede to other process
+    }
+
+    public void amIBreakingABlockHMMMMMMM() {
+        if (!ctx.getSelectedBlock().isPresent()) {
+            return;
+        }
+        blocksToReplace.put(ctx.getSelectedBlock().get(), ctx.world().getBlockState(ctx.getSelectedBlock().get()));
+    }
+
+    public List<BlockPos> toFillIn() {
+        return blocksToReplace
+                .keySet()
+                .stream()
+                .filter(pos -> ctx.world().getBlockState(pos).getBlock() == Blocks.AIR)
+                .filter(pos -> ctx.world().mayPlace(Blocks.DIRT, pos, false, EnumFacing.UP, null))
+                .filter(pos -> !partOfCurrentMovement(pos))
+                .sorted(Comparator.<BlockPos>comparingDouble(ctx.player()::getDistanceSq).reversed())
+                .collect(Collectors.toList());
+    }
+
+    private boolean partOfCurrentMovement(BlockPos pos) {
+        PathExecutor exec = baritone.getPathingBehavior().getCurrent();
+        if (exec == null || exec.finished() || exec.failed()) {
+            return false;
+        }
+        Movement movement = (Movement) exec.getPath().movements().get(exec.getPosition());
+        return Arrays.asList(movement.toBreakAll()).contains(pos);
+    }
+
+    @Override
+    public void onLostControl() {
+        blocksToReplace = new HashMap<>();
+    }
+
+    @Override
+    public String displayName0() {
+        return "Backfill";
+    }
+
+    @Override
+    public boolean isTemporary() {
+        return true;
+    }
+
+    @Override
+    public double priority() {
+        return 5;
+    }
+}

src/main/java/baritone/utils/PathingControlManager.java

@@ -92,8 +92,8 @@ public class PathingControlManager implements IPathingControlManager {
             p.secretInternalSetGoal(null);
             return;
         }
-        if (inControlThisTick != inControlLastTick && command.commandType != PathingCommandType.REQUEST_PAUSE) {
-            // if control has changed, and the new process wants to do something
+        if (inControlThisTick != inControlLastTick && command.commandType != PathingCommandType.REQUEST_PAUSE && inControlLastTick != null && !inControlLastTick.isTemporary()) {
+            // if control has changed from a real process to another real process, and the new process wants to do something
             p.cancelSegmentIfSafe();
             // get rid of the in progress stuff from the last process
         }
@@ -199,10 +199,10 @@ public class PathingControlManager implements IPathingControlManager {
 
             PathingCommand exec = proc.onTick(Objects.equals(proc, inControlLastTick) && baritone.getPathingBehavior().calcFailedLastTick(), baritone.getPathingBehavior().isSafeToCancel());
             if (exec == null) {
-                if (proc.isActive()) {
+                /*if (proc.isActive()) {
                     throw new IllegalStateException(proc.displayName() + " returned null PathingCommand");
                 }
-                proc.onLostControl();
+                proc.onLostControl();*/
             } else {
                 inControlThisTick = proc;
                 if (!proc.isTemporary()) {