devextreme
Version:
HTML5 JavaScript Component Suite for Responsive Web Development
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JavaScript
/**
* DevExtreme (esm/__internal/grids/grid_core/pager/m_pager.js)
* Version: 24.2.7
* Build date: Mon Apr 28 2025
*
* Copyright (c) 2012 - 2025 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
import messageLocalization from "../../../../common/core/localization/message";
import {
isDefined
} from "../../../../core/utils/type";
import {
hasWindow
} from "../../../../core/utils/window";
import Pagination from "../../../pagination/wrappers/pagination";
import modules from "../m_modules";
const PAGER_CLASS = "pager";
const MAX_PAGES_COUNT = 10;
const getPageIndex = function(dataController) {
return 1 + (parseInt(dataController.pageIndex()) || 0)
};
export class PagerView extends modules.View {
init() {
const dataController = this.getController("data");
dataController.changed.add((e => {
if (e && e.repaintChangesOnly) {
const pager = this._pager;
if (pager) {
pager.option({
pageIndex: getPageIndex(dataController),
pageSize: dataController.pageSize(),
pageCount: dataController.pageCount(),
itemCount: dataController.totalCount(),
hasKnownLastPage: dataController.hasKnownLastPage()
})
} else {
this.render()
}
} else if (!e || "update" !== e.changeType && "updateSelection" !== e.changeType && "updateFocusedRow" !== e.changeType) {
this._pager = null;
this.render()
}
}))
}
dispose() {
this._pager = null
}
optionChanged(args) {
const {
name: name
} = args;
const isPager = "pager" === name;
const isPaging = "paging" === name;
const isDataSource = "dataSource" === name;
const isScrolling = "scrolling" === name;
const dataController = this.getController("data");
if (isPager || isPaging || isScrolling || isDataSource) {
args.handled = true;
if (dataController.skipProcessingPagingChange(args.fullName)) {
return
}
if (isPager || isPaging) {
this._pageSizes = null
}
if (!isDataSource) {
this._pager = null;
this._invalidate();
if (hasWindow() && isPager && this.component) {
this.component.resize()
}
}
}
}
_renderCore() {
const that = this;
const $element = that.element().addClass(that.addWidgetPrefix("pager"));
const pagerOptions = that.option("pager") ?? {};
const dataController = that.getController("data");
const keyboardController = that.getController("keyboardNavigation");
const options = {
maxPagesCount: 10,
pageIndex: getPageIndex(dataController),
pageCount: dataController.pageCount(),
pageSize: dataController.pageSize(),
showPageSizeSelector: pagerOptions.showPageSizeSelector,
showInfo: pagerOptions.showInfo,
displayMode: pagerOptions.displayMode,
pagesNavigatorVisible: pagerOptions.visible,
showNavigationButtons: pagerOptions.showNavigationButtons,
label: pagerOptions.label,
allowedPageSizes: that.getPageSizes(),
itemCount: dataController.totalCount(),
hasKnownLastPage: dataController.hasKnownLastPage(),
rtlEnabled: that.option("rtlEnabled"),
isGridCompatibilityMode: true,
_skipValidation: true,
pageIndexChanged(pageIndex) {
if (dataController.pageIndex() !== pageIndex - 1) {
dataController.pageIndex(pageIndex - 1)
}
},
pageSizeChanged(pageSize) {
dataController.pageSize(pageSize)
},
onKeyDown: e => keyboardController && keyboardController.executeAction("onKeyDown", e)
};
if (isDefined(pagerOptions.infoText)) {
options.infoText = pagerOptions.infoText
}
if (this._pager) {
this._pager.repaint();
return
}
if (hasWindow()) {
this._pager = that._createComponent($element, Pagination, options)
} else {
$element.addClass("dx-pager").html('<div class="dx-pages"><div class="dx-page"></div></div>')
}
}
getPager() {
return this._pager
}
getPageSizes() {
const that = this;
const dataController = that.getController("data");
const pagerOptions = that.option("pager");
const allowedPageSizes = pagerOptions && pagerOptions.allowedPageSizes;
const pageSize = dataController.pageSize();
if (!isDefined(that._pageSizes) || !that._pageSizes.includes(pageSize)) {
that._pageSizes = [];
if (pagerOptions) {
if (Array.isArray(allowedPageSizes)) {
that._pageSizes = allowedPageSizes
} else if (allowedPageSizes && pageSize > 1) {
that._pageSizes = [Math.floor(pageSize / 2), pageSize, 2 * pageSize]
}
}
}
return that._pageSizes
}
isVisible() {
const dataController = this.getController("data");
const pagerOptions = this.option("pager");
let pagerVisible = pagerOptions && pagerOptions.visible;
const scrolling = this.option("scrolling");
if ("auto" === pagerVisible) {
if (scrolling && ("virtual" === scrolling.mode || "infinite" === scrolling.mode)) {
pagerVisible = false
} else {
pagerVisible = dataController.pageCount() > 1 || dataController.isLoaded() && !dataController.hasKnownLastPage()
}
}
return !!pagerVisible
}
getHeight() {
return this.getElementHeight()
}
}
export const pagerModule = {
defaultOptions: () => ({
pager: {
visible: "auto",
showPageSizeSelector: false,
allowedPageSizes: "auto",
label: messageLocalization.format("dxPager-ariaLabel")
}
}),
views: {
pagerView: PagerView
}
};