@scoped-vaadin/grid
Version:
A free, flexible and high-quality Web Component for showing large amounts of tabular data
84 lines (75 loc) • 2.35 kB
JavaScript
/**
* @license
* Copyright (c) 2016 - 2024 Vaadin Ltd.
* This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
*/
import { createArrayDataProvider } from './array-data-provider.js';
/**
* @polymerMixin
*/
export const ArrayDataProviderMixin = (superClass) =>
class ArrayDataProviderMixin extends superClass {
static get properties() {
return {
/**
* An array containing the items which will be passed to renderer functions.
*
* @type {Array<!GridItem> | undefined}
*/
items: {
type: Array,
sync: true,
},
};
}
static get observers() {
return ['__dataProviderOrItemsChanged(dataProvider, items, isAttached, items.*)'];
}
/** @private */
__setArrayDataProvider(items) {
const arrayDataProvider = createArrayDataProvider(this.items, {});
arrayDataProvider.__items = items;
this._arrayDataProvider = arrayDataProvider;
this.size = items.length;
this.dataProvider = arrayDataProvider;
}
/**
* @override
* @protected
*/
_onDataProviderPageReceived() {
super._onDataProviderPageReceived();
if (this._arrayDataProvider) {
this.size = this._flatSize;
}
}
/** @private */
__dataProviderOrItemsChanged(dataProvider, items, isAttached) {
if (!isAttached) {
return;
}
if (this._arrayDataProvider) {
// Has an items array data provider beforehand
if (dataProvider !== this._arrayDataProvider) {
// A custom data provider was set externally
this._arrayDataProvider = undefined;
this.items = undefined;
} else if (!items) {
// The items array was unset
this._arrayDataProvider = undefined;
this.dataProvider = undefined;
this.size = 0;
this.clearCache();
} else if (this._arrayDataProvider.__items === items) {
// The items array was modified
this.clearCache();
} else {
// The items array was replaced
this.__setArrayDataProvider(items);
}
} else if (items) {
// There was no array data provider before items was set
this.__setArrayDataProvider(items);
}
}
};