Editor link components

* other minor fixes

packages/editor-ext/src/lib/selection.ts

@@ -0,0 +1,36 @@
+import { Extension } from "@tiptap/core";
+import { Plugin, PluginKey } from "@tiptap/pm/state";
+import { Decoration, DecorationSet } from "@tiptap/pm/view";
+
+export const Selection = Extension.create({
+  name: "selection",
+
+  addProseMirrorPlugins() {
+    const { editor } = this;
+
+    return [
+      new Plugin({
+        key: new PluginKey("selection"),
+        props: {
+          decorations(state) {
+            if (state.selection.empty) {
+              return null;
+            }
+
+            if (editor.isFocused === true) {
+              return null;
+            }
+
+            return DecorationSet.create(state.doc, [
+              Decoration.inline(state.selection.from, state.selection.to, {
+                class: "selection",
+              }),
+            ]);
+          },
+        },
+      }),
+    ];
+  },
+});
+
+export default Selection;