devextreme
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HTML5 JavaScript Component Suite for Responsive Web Development
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JavaScript
/**
* DevExtreme (cjs/data_helper.js)
* Version: 23.2.6
* Build date: Wed May 01 2024
*
* Copyright (c) 2012 - 2024 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
"use strict";
exports.default = void 0;
var _data_source = require("./data/data_source/data_source");
var _extend = require("./core/utils/extend");
var _utils = require("./data/data_source/utils");
var _data_controller = _interopRequireDefault(require("./ui/collection/data_controller"));
function _interopRequireDefault(obj) {
return obj && obj.__esModule ? obj : {
default: obj
}
}
const DATA_SOURCE_OPTIONS_METHOD = "_dataSourceOptions";
const DATA_SOURCE_CHANGED_METHOD = "_dataSourceChangedHandler";
const DATA_SOURCE_LOAD_ERROR_METHOD = "_dataSourceLoadErrorHandler";
const DATA_SOURCE_LOADING_CHANGED_METHOD = "_dataSourceLoadingChangedHandler";
const DATA_SOURCE_FROM_URL_LOAD_MODE_METHOD = "_dataSourceFromUrlLoadMode";
const SPECIFIC_DATA_SOURCE_OPTION = "_getSpecificDataSourceOption";
const NORMALIZE_DATA_SOURCE = "_normalizeDataSource";
const DataHelperMixin = {
postCtor: function() {
this.on("disposing", function() {
this._disposeDataSource()
}.bind(this))
},
_refreshDataSource: function() {
this._initDataSource();
this._loadDataSource()
},
_initDataSource: function() {
let dataSourceOptions = SPECIFIC_DATA_SOURCE_OPTION in this ? this._getSpecificDataSourceOption() : this.option("dataSource");
let widgetDataSourceOptions;
let dataSourceType;
this._disposeDataSource();
if (dataSourceOptions) {
if (dataSourceOptions instanceof _data_source.DataSource) {
this._isSharedDataSource = true;
this._dataSource = dataSourceOptions
} else {
widgetDataSourceOptions = "_dataSourceOptions" in this ? this._dataSourceOptions() : {};
dataSourceType = this._dataSourceType ? this._dataSourceType() : _data_source.DataSource;
dataSourceOptions = (0, _utils.normalizeDataSourceOptions)(dataSourceOptions, {
fromUrlLoadMode: "_dataSourceFromUrlLoadMode" in this && this._dataSourceFromUrlLoadMode()
});
this._dataSource = new dataSourceType((0, _extend.extend)(true, {}, widgetDataSourceOptions, dataSourceOptions))
}
if (NORMALIZE_DATA_SOURCE in this) {
this._dataSource = this._normalizeDataSource(this._dataSource)
}
this._addDataSourceHandlers();
this._initDataController()
}
},
_initDataController: function() {
var _this$option;
const dataController = null === (_this$option = this.option) || void 0 === _this$option ? void 0 : _this$option.call(this, "_dataController");
const dataSource = this._dataSource;
if (dataController) {
this._dataController = dataController
} else {
this._dataController = new _data_controller.default(dataSource)
}
},
_addDataSourceHandlers: function() {
if (DATA_SOURCE_CHANGED_METHOD in this) {
this._addDataSourceChangeHandler()
}
if ("_dataSourceLoadErrorHandler" in this) {
this._addDataSourceLoadErrorHandler()
}
if ("_dataSourceLoadingChangedHandler" in this) {
this._addDataSourceLoadingChangedHandler()
}
this._addReadyWatcher()
},
_addReadyWatcher: function() {
this.readyWatcher = function(isLoading) {
this._ready && this._ready(!isLoading)
}.bind(this);
this._dataSource.on("loadingChanged", this.readyWatcher)
},
_addDataSourceChangeHandler: function() {
const dataSource = this._dataSource;
this._proxiedDataSourceChangedHandler = function(e) {
this._dataSourceChangedHandler(dataSource.items(), e)
}.bind(this);
dataSource.on("changed", this._proxiedDataSourceChangedHandler)
},
_addDataSourceLoadErrorHandler: function() {
this._proxiedDataSourceLoadErrorHandler = this._dataSourceLoadErrorHandler.bind(this);
this._dataSource.on("loadError", this._proxiedDataSourceLoadErrorHandler)
},
_addDataSourceLoadingChangedHandler: function() {
this._proxiedDataSourceLoadingChangedHandler = this._dataSourceLoadingChangedHandler.bind(this);
this._dataSource.on("loadingChanged", this._proxiedDataSourceLoadingChangedHandler)
},
_loadDataSource: function() {
const dataSource = this._dataSource;
if (dataSource) {
if (dataSource.isLoaded()) {
this._proxiedDataSourceChangedHandler && this._proxiedDataSourceChangedHandler()
} else {
dataSource.load()
}
}
},
_loadSingle: function(key, value) {
key = "this" === key ? this._dataSource.key() || "this" : key;
return this._dataSource.loadSingle(key, value)
},
_isLastPage: function() {
return !this._dataSource || this._dataSource.isLastPage() || !this._dataSource._pageSize
},
_isDataSourceLoading: function() {
return this._dataSource && this._dataSource.isLoading()
},
_disposeDataSource: function() {
if (this._dataSource) {
if (this._isSharedDataSource) {
delete this._isSharedDataSource;
this._proxiedDataSourceChangedHandler && this._dataSource.off("changed", this._proxiedDataSourceChangedHandler);
this._proxiedDataSourceLoadErrorHandler && this._dataSource.off("loadError", this._proxiedDataSourceLoadErrorHandler);
this._proxiedDataSourceLoadingChangedHandler && this._dataSource.off("loadingChanged", this._proxiedDataSourceLoadingChangedHandler);
if (this._dataSource._eventsStrategy) {
this._dataSource._eventsStrategy.off("loadingChanged", this.readyWatcher)
}
} else {
this._dataSource.dispose()
}
delete this._dataSource;
delete this._proxiedDataSourceChangedHandler;
delete this._proxiedDataSourceLoadErrorHandler;
delete this._proxiedDataSourceLoadingChangedHandler
}
},
getDataSource: function() {
return this._dataSource || null
}
};
var _default = DataHelperMixin;
exports.default = _default;
module.exports = exports.default;
module.exports.default = exports.default;