more options to gc data (undomanager.clear and tryGc)

2020-01-27 03:42:32 +01:00
parent 705dce7838
commit e3c59b0aa7
6 changed files with 113 additions and 63 deletions
--- a/src/utils/Doc.js
+++ b/src/utils/Doc.js
@@ -25,10 +25,12 @@ export class Doc extends Observable {
  /**
   * @param {Object} conf configuration
   * @param {boolean} [conf.gc] Disable garbage collection (default: gc=true)
+   * @param {function(Item):boolean} [conf.gcFilter] Will be called before an Item is garbage collected. Return false to keep the Item.
   */
-  constructor ({ gc = true } = {}) {
+  constructor ({ gc = true, gcFilter = () => true } = {}) {
    super()
    this.gc = gc
+    this.gcFilter = gcFilter
    this.clientID = random.uint32()
    /**
     * @type {Map<string, AbstractType<YEvent>>}