vscroll/dist/esm5/processes/adapter/replace.js

Virtual scroll engine

import { __extends } from "tslib";
import Update from './update';
import { BaseAdapterProcessFactory, AdapterProcess, ProcessStatus } from '../misc/index';
var Replace = /** @class */ (function (_super) {
  __extends(Replace, _super);
  function Replace() {
    return _super !== null && _super.apply(this, arguments) || this;
  }
  Replace.run = function (scroller, options) {
    var params = Replace.parseInput(scroller, options).params;
    if (!params) {
      return;
    }
    var shouldReplace = Replace.doReplace(scroller, params);
    scroller.workflow.call({
      process: Replace.process,
      status: shouldReplace ? ProcessStatus.next : ProcessStatus.done,
    });
  };
  Replace.doReplace = function (scroller, params) {
    var toRemove = scroller.buffer.items
      .filter(function (item) { return params.predicate(item); })
      .map(function (item) { return item.$index; });
    if (!toRemove.length) {
      scroller.logger.log('no items to be replaced');
      return false;
    }
    var injected = false;
    var updateOptions = {
      predicate: function (_a) {
        var $index = _a.$index;
        if (!toRemove.includes($index)) {
          return true;
        }
        if (!injected) {
          injected = true;
          return params.items;
        }
        return false;
      },
      fixRight: params.fixRight
    };
    return Update.doUpdate(scroller, updateOptions);
  };
  return Replace;
}(BaseAdapterProcessFactory(AdapterProcess.replace)));
export default Replace;
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