Vanilla bugfix, allow fishing with blank B (#6826)

soh/soh/Enhancements/Fishing.cpp

@@ -3,7 +3,8 @@
 
 extern "C" {
 #include <variables.h>
-
+extern PlayState* gPlayState;
+extern SaveContext gSaveContext;
 f32 Fishing_GetMinimumRequiredScore();
 }
 
@@ -18,4 +19,29 @@ void RegisterFishingMessages() {
     COND_ID_HOOK(OnOpenText, 0x4080, CVarGetInteger(CVAR_ENHANCEMENT("CustomizeFishing"), 0), BuildFishingMessage);
 }
 
+// Vanilla bug: Not possible to fish with blank B because blank B item value 0xFF is saved
+// as temp B = disabled B -> fishing pole is unequipped.
+// Fix: If fishing, disregard disabled B and on B press set used item to fishing pole.
+void RegisterAllowFishingBlankB() {
+    COND_VB_SHOULD(VB_PUTAWAY_BECAUSE_DISABLED_ITEM_BUTTONS,
+                   (IS_RANDO || CVarGetInteger(CVAR_ENHANCEMENT("FishingBlankB"), IS_RANDO)), {
+                       if (gPlayState->interfaceCtx.unk_260 != 0 &&
+                           gSaveContext.equips.buttonItems[0] == ITEM_FISHING_POLE) {
+                           *should = false;
+                       }
+                   });
+
+    COND_VB_SHOULD(
+        VB_OVERRIDE_BUTTON_ITEM_USED, (IS_RANDO || CVarGetInteger(CVAR_ENHANCEMENT("FishingBlankB"), IS_RANDO)), {
+            s32* i = va_arg(args, s32*);
+            Player* player = va_arg(args, Player*);
+            s32* item = va_arg(args, s32*);
+            if (gPlayState->interfaceCtx.unk_260 != 0 && *i == 0 && player->itemAction == PLAYER_IA_FISHING_POLE) {
+                *item = ITEM_FISHING_POLE;
+            }
+        });
+}
+
 static RegisterShipInitFunc initFunc(RegisterFishingMessages, { CVAR_ENHANCEMENT("CustomizeFishing") });
+static RegisterShipInitFunc initAllowFishingBlankB(RegisterAllowFishingBlankB,
+                                                   { CVAR_ENHANCEMENT("FishingBlankB"), "IS_RANDO" });

soh/soh/Enhancements/game-interactor/vanilla-behavior/GIVanillaBehavior.h

@@ -3394,6 +3394,25 @@ typedef enum {
     VB_PREVENT_HOOKSHOT_PARENT_SOFTLOCK,
 
     // #### `result`
+    // ```c
+    // true
+    // ```
+    // #### `args`
+    // - none
+    VB_PUTAWAY_BECAUSE_DISABLED_ITEM_BUTTONS,
+
+    // #### `result`
+    // ```c
+    // true
+    // ```
+    // #### `args`
+    // - `s32* i` (button index)
+    // - `Player*`
+    // - `s32* item`
+    VB_OVERRIDE_BUTTON_ITEM_USED,
+
+    // #### `result`
+    // ```c
     // true if Goron Link is talking
     // ```
     // #### `args`

soh/soh/SohGui/SohMenuEnhancements.cpp

@@ -1676,6 +1676,10 @@ void SohMenu::AddMenuEnhancements() {
         .PreFunc(fishingDisabledFunc)
         .Options(IntSliderOptions().Min(6).Max(13).DefaultValue(13).Format("%d lbs.").Tooltip(
             "The minimum weight for the unique fishing reward as an adult."));
+    AddWidget(path, "Allow fishing with blank B", WIDGET_CVAR_CHECKBOX)
+        .CVar(CVAR_ENHANCEMENT("FishingBlankB"))
+        .Options(CheckboxOptions().Tooltip("Allow fishing even when not having any item equipped on the B button, "
+                                           "fixing a vanilla bug. Always enabled in randomizer."));
 
     // Extra Modes
     path.sidebarName = "Extra Modes";

soh/src/overlays/actors/ovl_player_actor/z_player.c

@@ -2524,8 +2524,10 @@ void Player_ProcessItemButtons(Player* this, PlayState* play) {
             }
             if (!Player_ItemIsInUse(this, B_BTN_ITEM) && !Player_ItemIsInUse(this, C_BTN_ITEM(0)) &&
                 !Player_ItemIsInUse(this, C_BTN_ITEM(1)) && !Player_ItemIsInUse(this, C_BTN_ITEM(2)) && !hasOnDpad) {
-                Player_UseItem(play, this, ITEM_NONE);
-                return;
+                if (GameInteractor_Should(VB_PUTAWAY_BECAUSE_DISABLED_ITEM_BUTTONS, true)) {
+                    Player_UseItem(play, this, ITEM_NONE);
+                    return;
+                }
             }
         }
 
@@ -2536,6 +2538,7 @@ void Player_ProcessItemButtons(Player* this, PlayState* play) {
         }
 
         item = Player_GetItemOnButton(play, i);
+        GameInteractor_Should(VB_OVERRIDE_BUTTON_ITEM_USED, true, &i, this, &item);
 
         if (item >= ITEM_NONE_FE) {
             for (i = 0; i < ARRAY_COUNT(sItemButtons); i++) {