add removeMark command

packages/core/src/commands/removeMark.ts

@@ -0,0 +1,32 @@
+import { Editor } from '../Editor'
+import { MarkType } from 'prosemirror-model'
+import getMarkType from '../utils/getMarkType'
+import getMarkRange from '../utils/getMarkRange'
+
+type RemoveMark = (type: string | MarkType) => any
+
+declare module '../Editor' {
+  interface Editor {
+    toggleMark: RemoveMark,
+  }
+}
+
+export default (next: Function, editor: Editor): RemoveMark => typeOrName => {
+  const { view, state, schema } = editor
+  const { tr, selection } = state
+  const type = getMarkType(typeOrName, schema)
+  let { from, to, $from, empty } = selection
+
+  if (empty) {
+    const range = getMarkRange($from, type)
+
+    if (range) {
+      from = range.from
+      to = range.to
+    }
+  }
+
+  tr.removeMark(from, to, type)
+  view.dispatch(tr)
+  next()
+}