chore: Move editor into codebase (#2930)

shared/editor/queries/getMarkRange.ts

@@ -0,0 +1,40 @@
+import { ResolvedPos, MarkType } from "prosemirror-model";
+
+export default function getMarkRange($pos?: ResolvedPos, type?: MarkType) {
+  if (!$pos || !type) {
+    return false;
+  }
+
+  const start = $pos.parent.childAfter($pos.parentOffset);
+  if (!start.node) {
+    return false;
+  }
+
+  const mark = start.node.marks.find((mark) => mark.type === type);
+  if (!mark) {
+    return false;
+  }
+
+  let startIndex = $pos.index();
+  let startPos = $pos.start() + start.offset;
+  let endIndex = startIndex + 1;
+  let endPos = startPos + start.node.nodeSize;
+
+  while (
+    startIndex > 0 &&
+    mark.isInSet($pos.parent.child(startIndex - 1).marks)
+  ) {
+    startIndex -= 1;
+    startPos -= $pos.parent.child(startIndex).nodeSize;
+  }
+
+  while (
+    endIndex < $pos.parent.childCount &&
+    mark.isInSet($pos.parent.child(endIndex).marks)
+  ) {
+    endPos += $pos.parent.child(endIndex).nodeSize;
+    endIndex += 1;
+  }
+
+  return { from: startPos, to: endPos, mark };
+}