Merge pull request #15989 from SandPoot/screentip-update

Update screentips

code/datums/screentips/screentips.dm

@@ -0,0 +1,40 @@
+#define HINT_ICON_FILE 'icons/UI_Icons/screentips/cursor_hints.dmi'
+
+/// Stores the cursor hint icons for screentip context.
+GLOBAL_LIST_INIT_TYPED(screentip_context_icons, /image, prepare_screentip_context_icons())
+
+/proc/prepare_screentip_context_icons()
+	var/list/output = list()
+	for(var/state in icon_states(HINT_ICON_FILE))
+		output[state] = image(HINT_ICON_FILE, icon_state = state)
+	return output
+
+/*
+ * # Builds context with each intent for this key
+ * Args:
+ * - context = list (REQUIRED)
+ * 	- context[key] = list (REQUIRED)
+ * - key = string (REQUIRED)
+ * - allow_image = boolean (not required)
+*/
+/proc/build_context(list/context, key, allow_image)
+	if(!(length(context) && length(context[key]) && key))
+		return ""
+	var/list/to_add
+	for(var/intent in context[key])
+		// Splits key combinations from mouse buttons. e.g. `Ctrl-Shift-LMB` goes in, `Ctrl-Shift-` goes out. Will be empty for single button actions.
+		var/key_combo = length(key) > 3 ? "[copytext(key, 1, -3)]" : ""
+		// Grab the mouse button, LMB/RMB+intent
+		var/button = "[copytext(key, -3)]-[intent]"
+		if(allow_image)
+			// Compile into image, if allowed
+			button = "\icon[GLOB.screentip_context_icons[button]]"
+		LAZYADD(to_add, "[key_combo][button][allow_image ? "" : ":"] [context[key][intent]]")
+
+	// Prepare separator for same button but different intent
+	var/separator = "[allow_image ? " " : " / "]"
+
+	// Voilá, final result
+	return to_add.Join(separator)
+
+#undef HINT_ICON_FILE