From 8d7f3aebc4d5356b7a6832029af6b0df6fd5f56f Mon Sep 17 00:00:00 2001
From: silicons <2003111+silicons@users.noreply.github.com>
Date: Wed, 2 Dec 2020 09:20:23 -0700
Subject: [PATCH] sigh

---
 code/controllers/subsystem/input.dm |  1 +
 code/modules/keybindings/setup.dm   | 27 ++++++++++++++++++++++++++-
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/code/controllers/subsystem/input.dm b/code/controllers/subsystem/input.dm
index 8c4fba367d..217449681d 100644
--- a/code/controllers/subsystem/input.dm
+++ b/code/controllers/subsystem/input.dm
@@ -98,6 +98,7 @@ SUBSYSTEM_DEF(input)
 		var/client/C = clients[i]
 		C.keyLoop()
 
+#define NONSENSICAL_VERB "NONSENSICAL_VERB_THAT_DOES_NOTHING"
 /// *sigh
 /client/verb/NONSENSICAL_VERB_THAT_DOES_NOTHING()
 	set name = ".NONSENSICAL_VERB_THAT_DOES_NOTHING"
diff --git a/code/modules/keybindings/setup.dm b/code/modules/keybindings/setup.dm
index 797dbe34e5..37ba43e22d 100644
--- a/code/modules/keybindings/setup.dm
+++ b/code/modules/keybindings/setup.dm
@@ -70,6 +70,24 @@
 	update_special_keybinds(prefs_override)
 	set_hotkeys_preference(prefs_override)
 
+/proc/keybind_collision_permutation(key, alt = FALSE, ctrl = FALSE, shift = FALSE)
+	var/list/permutations = list()
+	if(!shift)
+		permutations += "Shift"
+	if(!ctrl)
+		permutations += "Ctrl"
+	if(!alt)
+		permutations += "Alt"
+	. = list()
+	do_keybind_collision_permutations(key, permutations, .)
+
+/proc/do_keybind_collision_permutations(key, list/permutations = list(), list/out = list())
+	. = out
+	for(var/mod in permutations.Copy())
+		permutations -= mod
+		. += "[mod]+[key]"
+		do_keybind_collision_permutations("[mod]+[key]", permutations.Copy(), .)
+
 /client/proc/do_special_keybind(key, command, datum/preferences/prefs_override = prefs)
 	var/alt = findtext(key, "Alt")
 	if(alt)
@@ -83,8 +101,15 @@
 	if(!alt && !ctrl && !shift && !prefs_override.hotkeys)
 		return	/// DO NOT.
 	key = "[alt? "Alt+":""][ctrl? "Ctrl+":""][shift? "Shift+":""][key]"
+	var/list/settings = list("[key]" = "[command]")
+	var/list/permutations = keybind_collision_permutation(key, alt, ctrl, shift)
+	for(var/i in permutations)
+		permutations[i] = NONSENSICAL_VERB
+	settings |= permutations
 	for(var/macroset in SSinput.all_macrosets)
-		winset(src, "[macroset]-[REF(key)]", "parent=[macroset];name=[key];command=[command]")
+		for(var/k in settings)
+			var/c  = settings[k]
+			winset(src, "[macroset]-[REF(k)]", "parent=[macroset];name=[k];command=[c]")
 
 /**
   * Updates the keybinds for special keys