split helpers and utilities

packages/core/src/helpers/getMarkRange.ts

@@ -0,0 +1,44 @@
+import { MarkType, ResolvedPos } from 'prosemirror-model'
+
+interface Range {
+  from: number,
+  to: number,
+}
+
+export default function getMarkRange($pos: ResolvedPos, type: MarkType): Range | void {
+  if (!$pos || !type) {
+    return
+  }
+
+  const start = $pos.parent.childAfter($pos.parentOffset)
+
+  if (!start.node) {
+    return
+  }
+
+  const link = start.node.marks.find(mark => mark.type === type)
+
+  if (!link) {
+    return
+  }
+
+  let startIndex = $pos.index()
+  let startPos = $pos.start() + start.offset
+  let endIndex = startIndex + 1
+  let endPos = startPos + start.node.nodeSize
+
+  while (startIndex > 0 && link.isInSet($pos.parent.child(startIndex - 1).marks)) {
+    startIndex -= 1
+    startPos -= $pos.parent.child(startIndex).nodeSize
+  }
+
+  while (endIndex < $pos.parent.childCount && link.isInSet($pos.parent.child(endIndex).marks)) {
+    endPos += $pos.parent.child(endIndex).nodeSize
+    endIndex += 1
+  }
+
+  return {
+    from: startPos,
+    to: endPos,
+  }
+}