FIX: Restore support for docs plugin (#24)

common/common.scss

@@ -212,3 +212,10 @@ a.d-toc-close {
     content: "#{$composer_toc_text}";
   }
 }
+
+// Docs plugin outlet
+.below-docs-topic-outlet.d-toc-wrapper {
+  position: sticky;
+  top: calc(var(--header-offset, 60px) + 1em);
+  max-height: calc(100vh - 2em - var(--header-offset, 60px));
+}

javascripts/discourse/connectors/below-docs-topic/d-toc-wrapper.hbs

@@ -0,0 +1 @@
+{{!-- Docs TOC placeholder --}}

javascripts/discourse/initializers/disco-toc-main.js

@@ -76,11 +76,26 @@ export default {
         }
       });
 
+      api.onAppEvent("docs-topic:current-post-scrolled", () => {
+        this.updateTOCSidebar();
+      });
+
       api.onAppEvent("topic:current-post-scrolled", (args) => {
         if (args.postIndex !== 1) {
           return;
         }
 
+        this.updateTOCSidebar();
+      });
+
+      api.cleanupStream(() => {
+        document.body.classList.remove("d-toc-timeline-visible");
+        document.removeEventListener("click", this.clickTOC, false);
+      });
+    });
+  },
+
+  updateTOCSidebar() {
     if (!document.querySelector(".d-toc-cooked")) {
       return;
     }
@@ -93,10 +108,7 @@ export default {
       const distance = Math.abs(
         domUtils.offset(heading).top - headerOffset() - window.scrollY
       );
-          if (
+      if (closestHeadingDistance == null || distance < closestHeadingDistance) {
-            closestHeadingDistance == null ||
-            distance < closestHeadingDistance
-          ) {
         closestHeadingDistance = distance;
         closestHeading = heading;
       } else {
@@ -122,13 +134,6 @@ export default {
         liParent.classList.add("active");
       });
     }
-      });
-
-      api.cleanupStream(() => {
-        document.body.classList.remove("d-toc-timeline-visible");
-        document.removeEventListener("click", this.clickTOC, false);
-      });
-    });
   },
 
   insertTOC(headings) {