devextreme/dist/transpiled/core/element_data.js

HTML5 JavaScript Component Suite for Responsive Web Development

"use strict";

var WeakMap = require("./polyfills/weak_map");
var domAdapter = require("./dom_adapter");
var eventsEngine = require("../events/core/events_engine");
var MemorizedCallbacks = require("./memorized_callbacks");

var dataMap = new WeakMap();
var strategy;

var strategyChanging = new MemorizedCallbacks();
var beforeCleanData = function beforeCleanData() {};
var afterCleanData = function afterCleanData() {};

var setDataStrategy = exports.setDataStrategy = function (value) {
    strategyChanging.fire(value);

    strategy = value;

    var cleanData = strategy.cleanData;

    strategy.cleanData = function (nodes) {
        beforeCleanData(nodes);

        var result = cleanData.call(this, nodes);

        afterCleanData(nodes);

        return result;
    };
};

setDataStrategy({
    data: function data() {
        var element = arguments[0];
        var key = arguments[1];
        var value = arguments[2];

        if (!element) return;

        var elementData = dataMap.get(element);

        if (!elementData) {
            elementData = {};
            dataMap.set(element, elementData);
        }

        if (key === undefined) {
            return elementData;
        }

        if (arguments.length === 2) {
            return elementData[key];
        }

        elementData[key] = value;
        return value;
    },

    removeData: function removeData(element, key) {
        if (!element) return;
        if (key === undefined) {
            dataMap.delete(element);
        } else {
            var elementData = dataMap.get(element);
            if (elementData) {
                delete elementData[key];
            }
        }
    },

    cleanData: function cleanData(elements) {
        for (var i = 0; i < elements.length; i++) {
            eventsEngine.off(elements[i]);
            dataMap.delete(elements[i]);
        }
    }
});

exports.setDataStrategy = setDataStrategy;

exports.getDataStrategy = function () {
    return strategy;
};

exports.data = function () {
    return strategy.data.apply(this, arguments);
};

exports.strategyChanging = strategyChanging;

exports.beforeCleanData = function (callback) {
    beforeCleanData = callback;
};

exports.afterCleanData = function (callback) {
    afterCleanData = callback;
};

exports.cleanData = function (nodes) {
    return strategy.cleanData.call(this, nodes);
};

exports.removeData = function (element, key) {
    return strategy.removeData.call(this, element, key);
};

exports.cleanDataRecursive = function (element, cleanSelf) {
    if (!domAdapter.isElementNode(element)) {
        return;
    }

    var childElements = element.getElementsByTagName("*");

    strategy.cleanData(childElements);

    if (cleanSelf) {
        strategy.cleanData([element]);
    }
};