De-duplicate copy-pasted input/render code in menus

This removes duplicate code that came about as a result of various
possible permutations of menu options, depending on being M&P, having no
custom level support, having no editor support, and having MMMMMM.

The menus with such permutations are the following:

- main menu
  - "start game" is gone in MAKEANDPLAY
  - "player levels" is gone in NO_CUSTOM_LEVELS
  - "view credits" is gone in MAKEANDPLAY

- "game options"
  - "unlock play data" is gone in MAKEANDPLAY
  - "soundtrack" is gone if you don't have an mmmmmm.vvv file

- "player levels"
  - "level editor" is gone in NO_EDITOR

I achieve this de-duplication by clever use of calculating offsets,
which I feel is the best way to de-duplicate the code with the least
amount of work, if a little brittle.

The other options are to (1) put function pointers on each MenuOption
object, which is pretty verbose and would inflate Game::createmenu() by
a lot, (2) switch all game.currentmenuoption checks to instead check for
the text of the currently-selected menu option, which is very
error-prone because if you make a typo it won't be caught at
compile-time, (3) add a unique ID to each MenuOption object that
represents a text but will error at compile-time if you make a typo,
however this just duplicates all the menu option text, which is more
code than was duplicated previously.

So I just went with this one.

desktop_version/src/Input.cpp

@@ -114,39 +114,21 @@ void menuactionpress()
 {
     if (game.currentmenuname == "mainmenu")
     {
-
 #if defined(MAKEANDPLAY)
-        if (game.currentmenuoption == 0)
+#define MPOFFSET -1
-        {
+#else
-          //Bring you to the normal playmenu
+#define MPOFFSET 0
-            music.playef(11);
+#endif
-            game.createmenu("playerworlds");
+
-            map.nexttowercolour();
-        }
-        else if (game.currentmenuoption == 1)
-        {
-            //Options
-            music.playef(11);
-            game.createmenu("graphicoptions");
-            map.nexttowercolour();
-        }
-        else if (game.currentmenuoption == 2)
-        {
-            //Options
-            music.playef(11);
-            game.createmenu("options");
-            map.nexttowercolour();
-        }
-        else if (game.currentmenuoption == 3)
-        {
-            //bye!
-            music.playef(2);
-            game.mainmenu = 100;
-            graphics.fademode = 2;
-        }
-    }
-#elif !defined(MAKEANDPLAY)
 #if defined(NO_CUSTOM_LEVELS)
+#define NOCUSTOMSOFFSET -1
+#else
+#define NOCUSTOMSOFFSET 0
+#endif
+
+#define OFFSET (MPOFFSET+NOCUSTOMSOFFSET)
+
+#if !defined(MAKEANDPLAY)
         if (game.currentmenuoption == 0)
         {
             //Play
@@ -164,90 +146,55 @@ void menuactionpress()
                 map.nexttowercolour();
             }
         }
-        else if (game.currentmenuoption == 1)
+        else
+#endif
+#if !defined(NO_CUSTOM_LEVELS)
+        if (game.currentmenuoption == OFFSET+1)
+        {
+            //Bring you to the normal playmenu
+            music.playef(11);
+            game.createmenu("playerworlds");
+            map.nexttowercolour();
+        }
+        else
+#endif
+        if (game.currentmenuoption == OFFSET+2)
         {
             //Options
             music.playef(11);
             game.createmenu("graphicoptions");
             map.nexttowercolour();
         }
-        else if (game.currentmenuoption == 2)
+        else if (game.currentmenuoption == OFFSET+3)
         {
             //Options
             music.playef(11);
             game.createmenu("options");
             map.nexttowercolour();
         }
-        else if (game.currentmenuoption == 3)
+#if !defined(MAKEANDPLAY)
+        else if (game.currentmenuoption == OFFSET+4)
         {
             //Credits
             music.playef(11);
             game.createmenu("credits");
             map.nexttowercolour();
         }
-        else if (game.currentmenuoption == 4)
-        {
-            //bye!
-            music.playef(2);
-            game.mainmenu = 100;
-            graphics.fademode = 2;
-        }
 #else
-        if (game.currentmenuoption == 0)
+ #undef MPOFFSET
-        {
+ #define MPOFFSET -2
-            //Play
+#endif
-            if (game.telesummary == "" && game.quicksummary == "")
+        else if (game.currentmenuoption == OFFSET+5)
-            {
-                //No saves exist, just start a new game
-                game.mainmenu = 0;
-                graphics.fademode = 2;
-            }
-            else
-            {
-                //Bring you to the normal playmenu
-                music.playef(11);
-                game.createmenu("play");
-                map.nexttowercolour();
-            }
-        }
-        else if (game.currentmenuoption == 1)
-        {
-            //Bring you to the normal playmenu
-            music.playef(11);
-            game.createmenu("playerworlds");
-            map.nexttowercolour();
-        }
-        else if (game.currentmenuoption == 2)
-        {
-            //Options
-            music.playef(11);
-            game.createmenu("graphicoptions");
-            map.nexttowercolour();
-        }
-        else if (game.currentmenuoption == 3)
-        {
-            //Options
-            music.playef(11);
-            game.createmenu("options");
-            map.nexttowercolour();
-        }
-        else if (game.currentmenuoption == 4)
-        {
-            //Credits
-            music.playef(11);
-            game.createmenu("credits");
-            map.nexttowercolour();
-        }
-        else if (game.currentmenuoption == 5)
         {
             //bye!
             music.playef(2);
             game.mainmenu = 100;
             graphics.fademode = 2;
         }
- #endif
+#undef OFFSET
+#undef NOCUSTOMSOFFSET
+#undef MPOFFSET
     }
-#endif
 #if !defined(NO_CUSTOM_LEVELS)
     else if(game.currentmenuname=="levellist")
     {
@@ -305,7 +252,11 @@ void menuactionpress()
 #if !defined(NO_CUSTOM_LEVELS)
     else if(game.currentmenuname=="playerworlds")
     {
- #if !defined(NO_EDITOR)
+ #if defined(NO_EDITOR)
+  #define OFFSET -1
+ #else
+  #define OFFSET 0
+ #endif
         if(game.currentmenuoption==0){
 
             music.playef(11);
@@ -314,13 +265,17 @@ void menuactionpress()
             game.loadcustomlevelstats(); //Should only load a file if it's needed
             game.createmenu("levellist");
             map.nexttowercolour();
-        }else if(game.currentmenuoption==1){
+        }
+ #if !defined(NO_EDITOR)
+        if(game.currentmenuoption==1){
             //LEVEL EDITOR HOOK
             music.playef(11);
             game.mainmenu = 20;
             graphics.fademode = 2;
             ed.filename="";
-        }/*else if(game.currentmenuoption==2){
+        }
+ #endif
+        /*else if(game.currentmenuoption==offset+2){
             music.playef(11);
             //"OPENFOLDERHOOK"
             //When the player selects the "open level folder" menu option,
@@ -330,27 +285,13 @@ void menuactionpress()
             // - Open the levels folder for whatever operating system we're on
             SDL_assert(0 && "Remove open level dir");
 
-        }*/else if(game.currentmenuoption==2){
+        }*/else if(game.currentmenuoption==OFFSET+2){
             //back
             music.playef(11);
             game.createmenu("mainmenu");
             map.nexttowercolour();
         }
- #else
+#undef OFFSET
-        if(game.currentmenuoption==0){
-            music.playef(11);
-            game.levelpage=0;
-            ed.getDirectoryData();
-            game.loadcustomlevelstats(); //Should only load a file if it's needed
-            game.createmenu("levellist");
-            map.nexttowercolour();
-        }else if(game.currentmenuoption==1){
-            //back
-            music.playef(11);
-            game.createmenu("mainmenu");
-            map.nexttowercolour();
-        }
- #endif
     }
 #endif
     else if(game.currentmenuname=="errornostart"){
@@ -589,8 +530,12 @@ void menuactionpress()
     }
     else if (game.currentmenuname == "options")
     {
-
 #if defined(MAKEANDPLAY)
+#define OFFSET -1
+#else
+#define OFFSET 0
+#endif
+
         if (game.currentmenuoption == 0)
         {
             //accessibility options
@@ -598,61 +543,7 @@ void menuactionpress()
             game.createmenu("accessibility");
             map.nexttowercolour();
         }
-
+#if !defined(MAKEANDPLAY)
-        else if (game.currentmenuoption == 1)
-        {
-            //clear data menu
-            music.playef(11);
-            game.createmenu("controller");
-            map.nexttowercolour();
-        }
-        else if (game.currentmenuoption == 2)
-        {
-            //clear data menu
-            music.playef(11);
-            game.createmenu("cleardatamenu");
-            map.nexttowercolour();
-        }
-
-        if(music.mmmmmm){
-            if (game.currentmenuoption == 3)
-            {
-                //**** TOGGLE MMMMMM
-                if(game.usingmmmmmm > 0){
-                    game.usingmmmmmm=0;
-                }else{
-                    game.usingmmmmmm=1;
-                }
-                music.usingmmmmmm = !music.usingmmmmmm;
-                music.playef(11);
-                music.play(6);
-                game.savestats();
-            }
-            if (game.currentmenuoption == 4)
-            {
-                //back
-                music.playef(11);
-                game.createmenu("mainmenu");
-                map.nexttowercolour();
-            }
-        }else{
-            if (game.currentmenuoption == 3)
-            {
-                //back
-                music.playef(11);
-                game.createmenu("mainmenu");
-                map.nexttowercolour();
-            }
-        }
-
-#elif !defined(MAKEANDPLAY)
-        if (game.currentmenuoption == 0)
-        {
-            //accessibility options
-            music.playef(11);
-            game.createmenu("accessibility");
-            map.nexttowercolour();
-        }
         else if (game.currentmenuoption == 1)
         {
             //unlock play options
@@ -660,14 +551,15 @@ void menuactionpress()
             game.createmenu("unlockmenu");
             map.nexttowercolour();
         }
-        else if (game.currentmenuoption == 2)
+#endif
+        else if (game.currentmenuoption == OFFSET+2)
         {
             //clear data menu
             music.playef(11);
             game.createmenu("controller");
             map.nexttowercolour();
         }
-        else if (game.currentmenuoption == 3)
+        else if (game.currentmenuoption == OFFSET+3)
         {
             //clear data menu
             music.playef(11);
@@ -675,8 +567,8 @@ void menuactionpress()
             map.nexttowercolour();
         }
 
-        if(music.mmmmmm){
+        int mmmmmm_offset = music.mmmmmm ? 0 : -1;
-            if (game.currentmenuoption == 4)
+        if (game.currentmenuoption == OFFSET+4+mmmmmm_offset)
         {
             //**** TOGGLE MMMMMM
             if(game.usingmmmmmm > 0){
@@ -689,23 +581,14 @@ void menuactionpress()
             music.play(6);
             game.savestats();
         }
-            if (game.currentmenuoption == 5)
+        else if (game.currentmenuoption == OFFSET+5+mmmmmm_offset)
         {
             //back
             music.playef(11);
             game.createmenu("mainmenu");
             map.nexttowercolour();
         }
-        }else{
+#undef OFFSET
-            if (game.currentmenuoption == 4)
-            {
-                //back
-                music.playef(11);
-                game.createmenu("mainmenu");
-                map.nexttowercolour();
-            }
-        }
-#endif
     }
     else if (game.currentmenuname == "unlockmenutrials")
     {

desktop_version/src/Render.cpp

@@ -66,61 +66,38 @@ void menurender()
     }
     else if (game.currentmenuname == "options")
     {
-
 #if defined(MAKEANDPLAY)
+#define OFFSET -1
+#else
+#define OFFSET 0
+#endif
+
         if (game.currentmenuoption == 0)
         {
             graphics.bigprint( -1, 30, "Accessibility", tr, tg, tb, true);
             graphics.Print( -1, 65, "Disable screen effects, enable", tr, tg, tb, true);
             graphics.Print( -1, 75, "slowdown modes or invincibility", tr, tg, tb, true);
         }
-        else if (game.currentmenuoption == 1)
+#if !defined(MAKEANDPLAY)
-        {
-            graphics.bigprint( -1, 30, "Game Pad Options", tr, tg, tb, true);
-            graphics.Print( -1, 65, "Rebind your controller's buttons", tr, tg, tb, true);
-            graphics.Print( -1, 75, "and adjust sensitivity", tr, tg, tb, true);
-        }
-        else if (game.currentmenuoption == 2)
-        {
-            graphics.bigprint( -1, 30, "Clear Data", tr, tg, tb, true);
-            graphics.Print( -1, 65, "Delete your save data", tr, tg, tb, true);
-            graphics.Print( -1, 75, "and unlocked play modes", tr, tg, tb, true);
-        }else if (game.currentmenuoption == 3){
-            if(music.mmmmmm){
-                graphics.bigprint( -1, 30, "Soundtrack", tr, tg, tb, true);
-                graphics.Print( -1, 65, "Toggle between MMMMMM and PPPPPP", tr, tg, tb, true);
-                if(music.usingmmmmmm){
-                    graphics.Print( -1, 85, "Current soundtrack: MMMMMM", tr, tg, tb, true);
-                }else{
-                    graphics.Print( -1, 85, "Current soundtrack: PPPPPP", tr, tg, tb, true);
-                }
-            }
-        }
-#elif !defined(MAKEANDPLAY)
-        if (game.currentmenuoption == 0)
-        {
-            graphics.bigprint( -1, 30, "Accessibility", tr, tg, tb, true);
-            graphics.Print( -1, 65, "Disable screen effects, enable", tr, tg, tb, true);
-            graphics.Print( -1, 75, "slowdown modes or invincibility", tr, tg, tb, true);
-        }
         else if (game.currentmenuoption == 1)
         {
             graphics.bigprint( -1, 30, "Unlock Play Modes", tr, tg, tb, true);
             graphics.Print( -1, 65, "Unlock parts of the game normally", tr, tg, tb, true);
             graphics.Print( -1, 75, "unlocked as you progress", tr, tg, tb, true);
         }
-        else if (game.currentmenuoption == 2)
+#endif
+        else if (game.currentmenuoption == OFFSET+2)
         {
             graphics.bigprint( -1, 30, "Game Pad Options", tr, tg, tb, true);
             graphics.Print( -1, 65, "Rebind your controller's buttons", tr, tg, tb, true);
             graphics.Print( -1, 75, "and adjust sensitivity", tr, tg, tb, true);
         }
-        else if (game.currentmenuoption == 3)
+        else if (game.currentmenuoption == OFFSET+3)
         {
             graphics.bigprint( -1, 30, "Clear Data", tr, tg, tb, true);
             graphics.Print( -1, 65, "Delete your save data", tr, tg, tb, true);
             graphics.Print( -1, 75, "and unlocked play modes", tr, tg, tb, true);
-        }else if (game.currentmenuoption == 4)
+        }else if (game.currentmenuoption == OFFSET+4)
         {
             if(music.mmmmmm){
                 graphics.bigprint( -1, 30, "Soundtrack", tr, tg, tb, true);
@@ -132,7 +109,7 @@ void menurender()
                 }
             }
         }
-#endif
+#undef OFFSET
     }
     else if (game.currentmenuname == "graphicoptions")
     {