gethue/ko/bindings/ko.multiClick.js

Hue is an Open source SQL Query Editor for Databases/Warehouses

// Licensed to Cloudera, Inc. under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  Cloudera, Inc. licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import * as ko from 'knockout';

ko.bindingHandlers.multiClick = {
  init: function (element, valueAccessor, allBindings, viewModel, bindingContext) {
    const clickHandlerFunction = valueAccessor().click;
    const dblClickHandlerFunction = valueAccessor().dblClick;
    if (!dblClickHandlerFunction && !clickHandlerFunction) {
      return;
    }

    let clickedOnce = false;
    let singleClickTimeout = -1;
    let dblClickTimeout = -1;

    const newValueAccessor = function () {
      return function () {
        const clickArgs = arguments;
        if (!dblClickHandlerFunction && clickHandlerFunction) {
          clickHandlerFunction.apply(viewModel, clickArgs);
          return;
        }
        if (clickedOnce) {
          dblClickHandlerFunction.apply(viewModel, clickArgs);
          clickedOnce = false;
          clearTimeout(singleClickTimeout);
          clearTimeout(dblClickTimeout);
        } else if (clickHandlerFunction) {
          clickedOnce = true;
          singleClickTimeout = window.setTimeout(() => {
            clickHandlerFunction.apply(viewModel, clickArgs);
            dblClickTimeout = window.setTimeout(() => {
              clickedOnce = false;
            }, 100);
          }, 225);
        }
      };
    };

    ko.bindingHandlers.click.init(
      element,
      newValueAccessor,
      allBindings,
      viewModel,
      bindingContext
    );
  }
};