Add Online Manual and I_OpenURL stuff

src/dummy/i_system.c

@@ -195,5 +195,15 @@ void I_GetCursorPosition(INT32 *x, INT32 *y)
 	(void)y;
 }
 
+boolean I_HasOpenURL()
+{
+	return 0;
+}
+
+void I_OpenURL(const char *data)
+{
+	return;
+}
+
 #include "../sdl/dosstr.c"
 

src/i_system.h

@@ -309,6 +309,10 @@ void I_RegisterSysCommands(void);
 
 void I_CursedWindowMovement(int xd, int yd);
 
+boolean I_HasOpenURL(void);
+
+void I_OpenURL(const char *data);
+
 #ifdef __cplusplus
 } // extern "C"
 #endif

src/k_menu.h

@@ -1213,6 +1213,7 @@ extern struct extrasmenu_s {
 typedef enum
 {
 	extras_addons = 0,
+	extras_manual,
 	extras_tutorial,
 	extras_challenges,
 	extras_statistics,

src/menus/extras-1.c

@@ -17,6 +17,7 @@
 #include "../f_finale.h"
 #include "../k_credits.h"
 #include "../m_pw.h"
+#include "../i_system.h"
 
 static void M_Credits(INT32 choice)
 {
@@ -26,6 +27,32 @@ static void M_Credits(INT32 choice)
 	F_StartCredits();
 }
 
+const char *manual_url = "https://kartkrew.org/rr-manual";
+
+static void M_ManualSelect(INT32 choice)
+{
+	if (choice != MA_YES)
+		return;
+
+	I_OpenURL(manual_url);
+}
+
+static void M_Manual(INT32 choice)
+{
+	(void)choice;
+	restoreMenu = currentMenu;
+
+	if (I_HasOpenURL())
+	{
+		M_StartMessage("Online Manual", "This will open a webpage in your default browser.", M_ManualSelect, MM_YESNO, "Let's go!", "Not now...");
+	}
+	else
+	{
+		I_ClipboardCopy(manual_url, strlen(manual_url));
+		M_StartMessage("Online Manual", "A URL has been copied to your clipboard!", NULL, MM_NOTHING, NULL, NULL);
+	}
+}
+
 menuitem_t EXTRAS_Main[] =
 {
 	// The following has NULL strings for text and tooltip.
@@ -35,6 +62,9 @@ menuitem_t EXTRAS_Main[] =
 	{IT_STRING | IT_CALL, NULL, NULL,
 		NULL, {.routine = M_Addons}, 0, 0},
 
+	{IT_STRING | IT_CALL, "Online Manual", "Learn everything there is to know about handling, items, and strategy.",
+		NULL, {.routine = M_Manual}, 0, 0},
+
 	{IT_STRING | IT_CALL, "Tutorial", "Help Dr. Robotnik and Tails test out their new Ring Racers.",
 		NULL, {.routine = M_LevelSelectInit}, 0, GT_TUTORIAL},
 

src/sdl/i_system.cpp

@@ -1013,6 +1013,20 @@ I_CursedWindowMovement (int xd, int yd)
 	SDL_SetWindowPosition(window, window_x + xd, window_y + yd);
 }
 
+boolean I_HasOpenURL()
+{
+	#if (SDL_VERSION_ATLEAST(2, 0, 14))
+		return true;
+	#else
+		return false;
+	#endif
+}
+
+void I_OpenURL(const char *data)
+{
+	SDL_OpenURL(data);
+}
+
 //
 // I_JoyScale
 //