Double-tap to mine, tap anywhere to cancel (#4469)

* Double-tap to mine, tap anywhere to cancel

* Make comment consistent

* Remove desktop left-click mining cancel, prioritize mobile unit control over mining

* Mobile: double-tap doesn't configure blocks if unit was double-tapped; control unit detected in first tap of double-tap

* Add 'double-tap to mine' setting (default off)

* Desktop: cancel mining when mined tile is clicked

* Comment typo

* Prevent redundant condition check

* Cleanup

Co-authored-by: Anuken <arnukren@gmail.com>

core/src/mindustry/input/DesktopInput.java

@@ -44,6 +44,10 @@ public class DesktopInput extends InputHandler{
     public boolean deleting = false, shouldShoot = false, panning = false;
     /** Mouse pan speed. */
     public float panScale = 0.005f, panSpeed = 4.5f, panBoostSpeed = 11f;
+    /** Delta time between consecutive clicks. */
+    public long selectMillis = 0;
+    /** Previously selected tile. */
+    public Tile prevSelected;
 
     boolean showHint(){
         return ui.hudfrag.shown && Core.settings.getBool("hints") && selectRequests.isEmpty() &&
@@ -487,15 +491,19 @@ public class DesktopInput extends InputHandler{
                 sreq = req;
             }else if(req != null && req.breaking){
                 deleting = true;
+            }else if(Core.settings.getBool("doubletapmine") && selected == prevSelected && Time.timeSinceMillis(selectMillis) < 500){
+                tryBeginMine(selected);
             }else if(selected != null){
                 //only begin shooting if there's no cursor event
-                if(!tryTapPlayer(Core.input.mouseWorld().x, Core.input.mouseWorld().y) && !tileTapped(selected.build) && !player.unit().activelyBuilding() && !droppingItem &&
-                    !tryBeginMine(selected) && player.unit().mineTile == null && !Core.scene.hasKeyboard()){
+                if(!tryTapPlayer(Core.input.mouseWorld().x, Core.input.mouseWorld().y) && !tileTapped(selected.build) && !player.unit().activelyBuilding() && !droppingItem
+                    && (Core.settings.getBool("doubletapmine") ? !tryStopMine(selected) : !tryBeginMine(selected)) && !Core.scene.hasKeyboard()){
                     player.shooting = shouldShoot;
                 }
             }else if(!Core.scene.hasKeyboard()){ //if it's out of bounds, shooting is just fine
                 player.shooting = shouldShoot;
             }
+            selectMillis = Time.millis();
+            prevSelected = selected;
         }else if(Core.input.keyTap(Binding.deselect) && isPlacing()){
             block = null;
             mode = none;

core/src/mindustry/input/InputHandler.java

@@ -955,6 +955,23 @@ public abstract class InputHandler implements InputProcessor, GestureListener{
         return false;
     }
 
+    /** Tries to stop mining, returns true if mining was stopped. */
+    boolean tryStopMine(){
+        if(player.unit().mining()){
+            player.unit().mineTile = null;
+            return true;
+        }
+        return false;
+    }
+
+    boolean tryStopMine(Tile tile){
+        if(player.unit().mineTile == tile){
+            player.unit().mineTile = null;
+            return true;
+        }
+        return false;
+    }
+
     boolean canMine(Tile tile){
         return !Core.scene.hasMouse()
             && tile.drop() != null

core/src/mindustry/input/MobileInput.java

@@ -71,6 +71,8 @@ public class MobileInput extends InputHandler implements GestureListener{
     public Teamc target;
     /** Payload target being moved to. Can be a position (for dropping), or a unit/block. */
     public Position payloadTarget;
+    /** Unit last tapped, or null if last tap was not on a unit. */
+    public Unit unitTapped;
 
     //region utility methods
 
@@ -599,11 +601,7 @@ public class MobileInput extends InputHandler implements GestureListener{
             //add to selection queue if it's a valid BREAK position
             selectRequests.add(new BuildPlan(linked.x, linked.y));
         }else{
-            if(!canTapPlayer(worldx, worldy) && !tileTapped(linked.build)){
-                tryBeginMine(cursor);
-            }
-
-            //control units.
+            //control units
             if(count == 2){
                 //reset payload target
                 payloadTarget = null;
@@ -611,12 +609,20 @@ public class MobileInput extends InputHandler implements GestureListener{
                 if(!player.dead() && Mathf.within(worldx, worldy, player.unit().x, player.unit().y, player.unit().hitSize * 0.6f + 8f) && player.unit().type.commandLimit > 0){
                     Call.unitCommand(player);
                 }else{
-                    //control a unit/block
-                    Unit on = selectedUnit();
-                    if(on != null){
-                        Call.unitControl(player, on);
+                    //control a unit/block detected on first tap of double-tap
+                    if(unitTapped != null){
+                        Call.unitControl(player, unitTapped);
+                    }else if(!tryBeginMine(cursor)){
+                        tileTapped(linked.build);
                     }
                 }
+                return false;
+            }
+
+            unitTapped = selectedUnit();
+            //prevent mining if placing/breaking blocks
+            if(!tryStopMine() && !canTapPlayer(worldx, worldy) && !tileTapped(linked.build) && mode == none && !Core.settings.getBool("doubletapmine")){
+                tryBeginMine(cursor);
             }
         }
 

core/src/mindustry/ui/dialogs/SettingsMenuDialog.java

@@ -327,6 +327,8 @@ public class SettingsMenuDialog extends SettingsDialog{
             game.checkPref("buildautopause", false);
         }
 
+        game.checkPref("doubletapmine", false);
+      
         if(!ios){
             game.checkPref("modcrashdisable", true);
         }