1 files changed, 173 insertions, 0 deletions

diff --git a/src/extras/frontendoption.cpp b/src/extras/frontendoption.cpp
new file mode 100644
index 00000000..51814f35
--- /dev/null
+++ b/src/extras/frontendoption.cpp
@@ -0,0 +1,173 @@
+#include "common.h"
+
+#ifdef CUSTOM_FRONTEND_OPTIONS
+#include "frontendoption.h"
+
+int numCustomFrontendOptions = 0;
+FrontendOption *customFrontendOptions;
+
+int optionCursor = -1;
+eMenuScreen currentMenu;
+
+void ChangeScreen(eMenuScreen screen, int option, bool fadeIn)
+{
+	FrontEndMenuManager.m_nPrevScreen = FrontEndMenuManager.m_nCurrScreen;
+	FrontEndMenuManager.m_nCurrScreen = screen;
+	FrontEndMenuManager.m_nCurrOption = option;
+	if (fadeIn)
+		FrontEndMenuManager.m_nMenuFadeAlpha = 0;
+}
+
+void GoBack(bool fadeIn)
+{
+	int screen = !FrontEndMenuManager.m_bGameNotLoaded ?
+		aScreens[FrontEndMenuManager.m_nCurrScreen].m_PreviousPage[1] : aScreens[FrontEndMenuManager.m_nCurrScreen].m_PreviousPage[0];
+	int option = !FrontEndMenuManager.m_bGameNotLoaded ?
+		aScreens[FrontEndMenuManager.m_nCurrScreen].m_ParentEntry[1] : aScreens[FrontEndMenuManager.m_nCurrScreen].m_ParentEntry[0];
+
+	FrontEndMenuManager.ThingsToDoBeforeGoingBack();
+
+	ChangeScreen((eMenuScreen)screen, option, fadeIn);
+}
+
+uint8
+GetNumberOfMenuOptions(int screen)
+{
+	uint8 Rows = 0;
+	for (int i = 0; i < NUM_MENUROWS; i++) {
+		if (aScreens[screen].m_aEntries[i].m_Action == MENUACTION_NOTHING)
+			break;
+
+		++Rows;
+	}
+	return Rows;
+}
+
+// Used before populating options, but effective in InitialiseChangedLanguageSettings and debugmenu
+void
+RemoveCustomFrontendOptions()
+{
+	if (numCustomFrontendOptions == 0)
+		return;
+
+	for (int i = 0; i < MENUPAGES; i++) {
+		for (int j = 0; j < NUM_MENUROWS; j++) {
+			if (aScreens[i].m_aEntries[j].m_Action == MENUACTION_TRIGGERFUNC) {
+				int k;
+				for (k = j; k < NUM_MENUROWS-1; k++) {
+					memcpy(&aScreens[i].m_aEntries[k], &aScreens[i].m_aEntries[k+1], sizeof(CMenuScreen::CMenuEntry));
+				}
+				aScreens[i].m_aEntries[k].m_Action = MENUACTION_NOTHING;
+				aScreens[i].m_aEntries[k].m_EntryName[0] = '\0';
+				j--;
+			}
+		}
+	}
+	free(customFrontendOptions);
+	numCustomFrontendOptions = 0;
+}
+
+int8 RegisterNewOption(int screen)
+{
+	numCustomFrontendOptions++;
+	if (numCustomFrontendOptions == 1)
+		customFrontendOptions = (FrontendOption*)malloc(5 * sizeof(FrontendOption));
+	else if (numCustomFrontendOptions % 5 == 1)
+		customFrontendOptions = (FrontendOption*)realloc(customFrontendOptions, (numCustomFrontendOptions + 4) * sizeof(FrontendOption));
+
+	assert(customFrontendOptions != nil && "Custom frontend options can't be allocated");
+
+	uint8 nth = GetNumberOfMenuOptions(screen);
+	if (optionCursor < 0) {
+		if (optionCursor == -1) {
+			if (!strcmp(aScreens[screen].m_aEntries[nth - 1].m_EntryName, "FEDS_TB") || !strcmp(aScreens[screen].m_aEntries[nth - 1].m_EntryName, "FESZ_CA")) {
+				// Move back button one below
+				memcpy(&aScreens[screen].m_aEntries[nth], &aScreens[screen].m_aEntries[nth - 1], sizeof(CMenuScreen::CMenuEntry));
+				nth--;
+			}
+		}
+	} else {
+		if (aScreens[screen].m_aEntries[optionCursor].m_Action != MENUACTION_NOTHING) {
+			for (int i = nth - 1; i >= optionCursor; i--) {
+				memcpy(&aScreens[screen].m_aEntries[i + 1], &aScreens[screen].m_aEntries[i], sizeof(CMenuScreen::CMenuEntry));
+			}
+		}
+		nth = optionCursor;
+		optionCursor++;
+	}
+
+	aScreens[screen].m_aEntries[nth].m_Action = MENUACTION_TRIGGERFUNC;
+	aScreens[screen].m_aEntries[nth].m_TargetMenu = numCustomFrontendOptions - 1;
+	aScreens[screen].m_aEntries[nth].m_EntryName[0] = 1; // just something to fool it
+	return nth;
+}
+
+void FrontendOptionSetPosition(eMenuScreen screen, int8 option)
+{
+	currentMenu = screen;
+	optionCursor = option;
+}
+
+void FrontendOptionAddSelect(const wchar* leftText, const wchar** rightTexts, int8 numRightTexts, int8 *var, bool onlyApplyOnEnter, ChangeFunc changeFunc, ReturnPrevPageFunc returnPrevPageFunc)
+{
+	int8 screenOptionOrder = RegisterNewOption(currentMenu);
+
+	FrontendOption& option = customFrontendOptions[numCustomFrontendOptions - 1];
+	option.screen = currentMenu;
+	option.type = FEOPTION_SELECT;
+	option.leftText = leftText;
+	option.rightTexts = rightTexts;
+	option.numRightTexts = numRightTexts;
+	option.value = var;
+	option.displayedValue = *var;
+	option.onlyApplyOnEnter = onlyApplyOnEnter;
+	option.changeFunc = changeFunc;
+	option.screenOptionOrder = screenOptionOrder;
+	option.returnPrevPageFunc = returnPrevPageFunc;
+}
+
+void FrontendOptionAddDynamic(const wchar* leftText, DrawFunc drawFunc, ButtonPressFunc buttonPressFunc, ReturnPrevPageFunc returnPrevPageFunc)
+{
+	int8 screenOptionOrder = RegisterNewOption(currentMenu);
+
+	FrontendOption& option = customFrontendOptions[numCustomFrontendOptions - 1];
+	option.screen = currentMenu;
+	option.type = FEOPTION_DYNAMIC;
+	option.drawFunc = drawFunc;
+	option.buttonPressFunc = buttonPressFunc;
+	option.leftText = leftText;
+	option.onlyApplyOnEnter = false;
+	option.screenOptionOrder = screenOptionOrder;
+	option.returnPrevPageFunc = returnPrevPageFunc;
+}
+
+void FrontendOptionAddRedirect(const wchar* text, eMenuScreen to, int8 selectedOption, bool fadeIn)
+{
+	int8 screenOptionOrder = RegisterNewOption(currentMenu);
+
+	FrontendOption &option = customFrontendOptions[numCustomFrontendOptions - 1];
+	option.screen = currentMenu;
+	option.type = FEOPTION_REDIRECT;
+	option.to = to;
+	option.option = selectedOption;
+	option.fadeIn = fadeIn;
+	option.leftText = text;
+	option.onlyApplyOnEnter = false;
+	option.screenOptionOrder = screenOptionOrder;
+	option.returnPrevPageFunc = nil;
+}
+
+void FrontendOptionAddBackButton(const wchar* text, bool fadeIn)
+{
+	int8 screenOptionOrder = RegisterNewOption(currentMenu);
+
+	FrontendOption& option = customFrontendOptions[numCustomFrontendOptions - 1];
+	option.screen = currentMenu;
+	option.type = FEOPTION_GOBACK;
+	option.fadeIn = fadeIn;
+	option.leftText = text;
+	option.onlyApplyOnEnter = false;
+	option.screenOptionOrder = screenOptionOrder;
+	option.returnPrevPageFunc = nil;
+}
+#endif
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