feat: Pass the current property as a parameter for trait callbacks (#432

)

This allows layout authors to write custom callbacks which can refer
back to the trait for that callback. With the current implementation,
the callback has access to the monster, but no reference to the current
trait being rendered.

src/settings/layout/blocks/ui/block.ts

@@ -999,8 +999,10 @@ class TraitsModal extends MarkdownEnabledModal<TraitsItem> {
                         text: "The callback will receive the "
                     });
                     e.createEl("code", { text: "monster" });
+                    e.createSpan({ text: " and " });
+                    e.createEl("code", { text: "property" });
                     e.createSpan({
-                        text: " parameter. The callback should return a string. For example: "
+                        text: " parameters. The callback should return a string. For example: "
                     });
 
                     e.createEl("code", { text: "return monster.name" });

src/view/ui/Traits.svelte

@@ -17,8 +17,8 @@
         try {
             const frame = document.body.createEl("iframe");
             const funct = (frame.contentWindow as any).Function;
-            const func = new funct("monster", item.callback);
-            desc = func.call(undefined, monster) ?? desc;
+            const func = new funct("monster", "property", item.callback);
+            desc = func.call(undefined, monster, trait) ?? desc;
             document.body.removeChild(frame);
         } catch (e) {
             new Notice(