1 files changed, 86 insertions, 0 deletions

diff --git a/src/extras/frontendoption.h b/src/extras/frontendoption.h
new file mode 100644
index 00000000..6c6ac20c
--- /dev/null
+++ b/src/extras/frontendoption.h
@@ -0,0 +1,86 @@
+#pragma once
+#include "common.h"
+
+#ifdef CUSTOM_FRONTEND_OPTIONS
+#include "Frontend.h"
+
+// Warning: All of the code relies on that you won't use more then NUM_MENUROWS(18) options on one page. Also congrats if you can make 18 options visible at once.
+
+
+// Static/select:	User allocates variable, passes it to function and it's set automatically from input among the strings given to function,
+//					then you can handle ChangeFunc and ReturnPrevPageFunc if needed.
+//
+// Dynamic:			Function doesn't accept value pointer, user should do operations with handling ButtonPressFunc.
+//					Right-side text can be set via DrawFunc, which is called on every draw. ReturnPrevPageFunc is also here if needed.
+
+#define FEOPTION_SELECT 0
+#define FEOPTION_DYNAMIC 1
+#define FEOPTION_REDIRECT 2
+#define FEOPTION_GOBACK 3
+
+#define FEOPTION_ACTION_LEFT 0
+#define FEOPTION_ACTION_RIGHT 1
+#define FEOPTION_ACTION_SELECT 2
+
+void RemoveCustomFrontendOptions();
+void CustomFrontendOptionsPopulate();
+
+// for static and dynamic options
+typedef void (*ReturnPrevPageFunc)();
+
+// for static options
+typedef void (*ChangeFunc)(int8 displayedValue); // called before updating the value
+
+// for dynamic options
+typedef void (*DrawFunc)(wchar* out, bool* disabled); // parameters should be set by user, both is allocated. disabled option will be dark yellow
+typedef void (*ButtonPressFunc)(int8 action); // see FEOPTION_ACTIONs above
+
+struct FrontendOption
+{
+	int8 type;
+	int8 screenOptionOrder;
+	eMenuScreen screen;
+	const wchar* leftText;
+	ReturnPrevPageFunc returnPrevPageFunc;
+	
+	union {
+		// Only for dynamic
+		struct {
+			DrawFunc drawFunc;
+			ButtonPressFunc buttonPressFunc;
+		};
+
+		// Only for static/select
+		struct {
+			const wchar** rightTexts;
+			int8 numRightTexts;
+			int8 *value;
+			int8 displayedValue; // if onlyApplyOnEnter enabled
+			bool onlyApplyOnEnter;
+			ChangeFunc changeFunc;
+		};
+
+		// Only for redirect
+		struct {
+			eMenuScreen to;
+			int8 option;
+			bool fadeIn;
+		};
+	};
+};
+
+extern int numCustomFrontendOptions;
+extern FrontendOption* customFrontendOptions;
+
+// To be used in ButtonPressFunc / ChangeFunc(but that would be weird):
+void ChangeScreen(eMenuScreen screen, int option = 0, bool fadeIn = true);
+void GoBack(bool fadeIn = true);
+
+// If option is positive number, all calls will increase it before using it (you can think it as cursor). -1 means before the back button, -2 is end of page
+void FrontendOptionSetPosition(eMenuScreen screen, int8 option = -1);
+
+void FrontendOptionAddSelect(const wchar* leftText, const wchar** rightTexts, int8 numRightTexts, int8 *var, bool onlyApplyOnEnter, ChangeFunc changeFunc, ReturnPrevPageFunc returnPrevPageFunc);
+void FrontendOptionAddDynamic(const wchar* leftText, DrawFunc rightTextDrawFunc, ButtonPressFunc buttonPressFunc, ReturnPrevPageFunc returnPrevPageFunc);
+void FrontendOptionAddRedirect(const wchar* text, eMenuScreen to, int8 selectedOption = 0, bool fadeIn = true);
+void FrontendOptionAddBackButton(const wchar* text, bool fadeIn = true);
+#endif
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