Add a custom DocumentSheetConfig that supports tab-based configuration for my system-specific stuff

module/utils/getSizing.mjs

@@ -0,0 +1,32 @@
+import { PlayerSheet } from "../apps/PlayerSheet.mjs";
+
+/**
+ * @typedef SheetSizing
+ * @property {number} width The initial width of the application
+ * @property {number} height The initial height of the application
+ * @property {boolean} resizable Whether or not the application
+ * is able to be resized with a drag handle.
+ */
+
+/**
+ * Retrieves the computed default sizing data based on world settings
+ * and the sheet class' DEFAULT_OPTIONS
+ * @returns {SheetSizing}
+ */
+export function getDefaultSizing() {
+	/** @type {SheetSizing} */
+	const sizing = {
+		width: undefined,
+		height: undefined,
+		resizable: undefined,
+	};
+
+	// TODO: defaults from world settings
+
+	// Defaults from the sheet class itself
+	sizing.height ||= PlayerSheet.DEFAULT_OPTIONS.position.height;
+	sizing.width ||= PlayerSheet.DEFAULT_OPTIONS.position.width;
+	sizing.resizable ||= PlayerSheet.DEFAULT_OPTIONS.window.resizable;
+
+	return sizing;
+};