devextreme
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HTML5 JavaScript Component Suite for Responsive Web Development
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JavaScript
/**
* DevExtreme (cjs/ui/grid_core/ui.grid_core.virtual_scrolling.js)
* Version: 21.1.4
* Build date: Mon Jun 21 2021
*
* Copyright (c) 2012 - 2021 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
"use strict";
exports.virtualScrollingModule = void 0;
var _renderer = _interopRequireDefault(require("../../core/renderer"));
var _window = require("../../core/utils/window");
var _uiGrid_core = require("./ui.grid_core.virtual_scrolling_core");
var _uiGrid_core2 = _interopRequireDefault(require("./ui.grid_core.utils"));
var _iterator = require("../../core/utils/iterator");
var _deferred = require("../../core/utils/deferred");
var _load_indicator = _interopRequireDefault(require("../load_indicator"));
var _browser = _interopRequireDefault(require("../../core/utils/browser"));
var _position = require("../../core/utils/position");
var _type = require("../../core/utils/type");
function _interopRequireDefault(obj) {
return obj && obj.__esModule ? obj : {
default: obj
}
}
var TABLE_CLASS = "table";
var BOTTOM_LOAD_PANEL_CLASS = "bottom-load-panel";
var TABLE_CONTENT_CLASS = "table-content";
var GROUP_SPACE_CLASS = "group-space";
var CONTENT_CLASS = "content";
var ROW_CLASS = "dx-row";
var FREESPACE_CLASS = "dx-freespace-row";
var COLUMN_LINES_CLASS = "dx-column-lines";
var VIRTUAL_ROW_CLASS = "dx-virtual-row";
var SCROLLING_MODE_INFINITE = "infinite";
var SCROLLING_MODE_VIRTUAL = "virtual";
var SCROLLING_MODE_STANDARD = "standard";
var PIXELS_LIMIT = 25e4;
var LOAD_TIMEOUT = 300;
var NEW_SCROLLING_MODE = "scrolling.newMode";
var isVirtualMode = function(that) {
return that.option("scrolling.mode") === SCROLLING_MODE_VIRTUAL
};
var isAppendMode = function(that) {
return that.option("scrolling.mode") === SCROLLING_MODE_INFINITE
};
var isVirtualRowRendering = function(that) {
var rowRenderingMode = that.option("scrolling.rowRenderingMode");
if (rowRenderingMode === SCROLLING_MODE_VIRTUAL) {
return true
} else if (rowRenderingMode === SCROLLING_MODE_STANDARD) {
return false
}
};
var _correctCount = function(items, count, fromEnd, isItemCountableFunc) {
for (var i = 0; i < count + 1; i++) {
var item = items[fromEnd ? items.length - 1 - i : i];
if (item && !isItemCountableFunc(item, i === count, fromEnd)) {
count++
}
}
return count
};
var isItemCountableByDataSource = function(item, dataSource) {
return "data" === item.rowType && !item.isNewRow || "group" === item.rowType && dataSource.isGroupItemCountable(item.data)
};
var updateItemIndices = function(items) {
items.forEach((function(item, index) {
item.rowIndex = index
}));
return items
};
var VirtualScrollingDataSourceAdapterExtender = function() {
var _updateLoading = function(that) {
var beginPageIndex = that._virtualScrollController.beginPageIndex(-1);
if (isVirtualMode(that)) {
if (beginPageIndex < 0 || that.viewportSize() >= 0 && that.getViewportItemIndex() >= 0 && (beginPageIndex * that.pageSize() > that.getViewportItemIndex() || beginPageIndex * that.pageSize() + that.itemsCount() < that.getViewportItemIndex() + that.viewportSize()) && that._dataSource.isLoading()) {
if (!that._isLoading) {
that._isLoading = true;
that.loadingChanged.fire(true)
}
} else if (that._isLoading) {
that._isLoading = false;
that.loadingChanged.fire(false)
}
}
};
var result = {
init: function() {
this.callBase.apply(this, arguments);
this._items = [];
this._isLoaded = true;
this._loadPageCount = 1;
this._virtualScrollController = new _uiGrid_core.VirtualScrollController(this.component, this._getVirtualScrollDataOptions())
},
_getVirtualScrollDataOptions: function() {
var that = this;
return {
pageSize: function() {
return that.pageSize()
},
totalItemsCount: function() {
return that.totalItemsCount()
},
hasKnownLastPage: function() {
return that.hasKnownLastPage()
},
pageIndex: function(index) {
return that._dataSource.pageIndex(index)
},
isLoading: function() {
return that._dataSource.isLoading() && !that.isCustomLoading()
},
pageCount: function() {
return that.pageCount()
},
load: function() {
return that._dataSource.load()
},
updateLoading: function() {
_updateLoading(that)
},
itemsCount: function() {
return that.itemsCount(true)
},
items: function() {
return that._dataSource.items()
},
viewportItems: function(items) {
if (items) {
that._items = items
}
return that._items
},
onChanged: function(e) {
that.changed.fire(e)
},
changingDuration: function(e) {
if (that.isLoading()) {
return LOAD_TIMEOUT
}
return that._renderTime || 0
}
}
},
_handleLoadingChanged: function(isLoading) {
if (this.option(NEW_SCROLLING_MODE)) {
this.callBase.apply(this, arguments);
return
}
if (!isVirtualMode(this) || this._isLoadingAll) {
this._isLoading = isLoading;
this.callBase.apply(this, arguments)
}
if (isLoading) {
this._startLoadTime = new Date
} else {
this._startLoadTime = void 0
}
},
_handleLoadError: function() {
if (!this.option(NEW_SCROLLING_MODE)) {
this._isLoading = false;
this.loadingChanged.fire(false)
}
this.callBase.apply(this, arguments)
},
_handleDataChanged: function(e) {
if (this.option(NEW_SCROLLING_MODE)) {
this.callBase.apply(this, arguments);
return
}
var callBase = this.callBase.bind(this);
this._virtualScrollController.handleDataChanged(callBase, e)
},
_customizeRemoteOperations: function(options, operationTypes) {
var newMode = this.option(NEW_SCROLLING_MODE);
if ((isVirtualMode(this) || isAppendMode(this) && newMode) && !operationTypes.reload && (operationTypes.skip || newMode) && this._renderTime < this.option("scrolling.renderingThreshold")) {
options.delay = void 0
}
this.callBase.apply(this, arguments)
},
items: function() {
if (this.option(NEW_SCROLLING_MODE)) {
return this._dataSource.items()
}
return this._items
},
itemsCount: function(isBase) {
if (isBase) {
return this.callBase()
}
return this._virtualScrollController.itemsCount()
},
load: function(loadOptions) {
if (this.option(NEW_SCROLLING_MODE) || loadOptions) {
return this.callBase(loadOptions)
}
return this._virtualScrollController.load()
},
isLoading: function() {
return this._isLoading
},
isLoaded: function() {
return this._dataSource.isLoaded() && this._isLoaded
},
resetPagesCache: function(isLiveUpdate) {
if (!isLiveUpdate) {
this._virtualScrollController.reset(true)
}
this.callBase.apply(this, arguments)
},
_changeRowExpandCore: function() {
var result = this.callBase.apply(this, arguments);
if (this.option(NEW_SCROLLING_MODE)) {
return result
}
this.resetPagesCache();
_updateLoading(this);
return result
},
reload: function() {
this._dataSource.pageIndex(this.pageIndex());
var virtualScrollController = this._virtualScrollController;
if (!this.option(NEW_SCROLLING_MODE) && virtualScrollController) {
var d = new _deferred.Deferred;
this.callBase.apply(this, arguments).done((function(r) {
var delayDeferred = virtualScrollController.getDelayDeferred();
if (delayDeferred) {
delayDeferred.done(d.resolve).fail(d.reject)
} else {
d.resolve(r)
}
})).fail(d.reject);
return d
} else {
return this.callBase.apply(this, arguments)
}
},
refresh: function(options, operationTypes) {
if (!this.option(NEW_SCROLLING_MODE)) {
var storeLoadOptions = options.storeLoadOptions;
var dataSource = this._dataSource;
if (operationTypes.reload) {
this._virtualScrollController.reset();
dataSource.items().length = 0;
this._isLoaded = false;
_updateLoading(this);
this._isLoaded = true;
if (isAppendMode(this)) {
this.pageIndex(0);
dataSource.pageIndex(0);
storeLoadOptions.pageIndex = 0;
options.pageIndex = 0;
storeLoadOptions.skip = 0
} else {
dataSource.pageIndex(this.pageIndex());
if (dataSource.paginate()) {
options.pageIndex = this.pageIndex();
storeLoadOptions.skip = this.pageIndex() * this.pageSize()
}
}
} else if (isAppendMode(this) && storeLoadOptions.skip && this._skipCorrection < 0) {
storeLoadOptions.skip += this._skipCorrection
}
}
return this.callBase.apply(this, arguments)
},
dispose: function() {
this._virtualScrollController.dispose();
this.callBase.apply(this, arguments)
},
loadPageCount: function(count) {
if (!(0, _type.isDefined)(count)) {
return this._loadPageCount
}
this._loadPageCount = count
},
_handleDataLoading: function(options) {
var loadPageCount = this.loadPageCount();
options.loadPageCount = loadPageCount;
if (this.option(NEW_SCROLLING_MODE) && loadPageCount > 1) {
options.storeLoadOptions.take = loadPageCount * this.pageSize()
}
this.callBase.apply(this, arguments)
},
_loadPageSize: function() {
return this.callBase.apply(this, arguments) * this.loadPageCount()
}
};
["beginPageIndex", "endPageIndex"].forEach((function(name) {
result[name] = function() {
if (this.option(NEW_SCROLLING_MODE)) {
var dataSource = this._dataSource;
return dataSource.pageIndex.apply(dataSource, arguments)
}
var virtualScrollController = this._virtualScrollController;
return virtualScrollController[name].apply(virtualScrollController, arguments)
}
}));
["virtualItemsCount", "getContentOffset", "getVirtualContentSize", "setContentItemSizes", "setViewportPosition", "getViewportItemIndex", "setViewportItemIndex", "getItemIndexByPosition", "viewportSize", "viewportItemSize", "getItemSize", "getItemSizes", "pageIndex", "loadIfNeed"].forEach((function(name) {
result[name] = function() {
var virtualScrollController = this._virtualScrollController;
return virtualScrollController[name].apply(virtualScrollController, arguments)
}
}));
return result
}();
var VirtualScrollingRowsViewExtender = function() {
var removeEmptyRows = function($emptyRows, className) {
var tBodies = $emptyRows.toArray().map((function(row) {
return (0, _renderer.default)(row).parent("." + className).get(0)
})).filter((function(row) {
return row
}));
if (tBodies.length) {
$emptyRows = (0, _renderer.default)(tBodies)
}
var rowCount = className === FREESPACE_CLASS ? $emptyRows.length - 1 : $emptyRows.length;
for (var i = 0; i < rowCount; i++) {
$emptyRows.eq(i).remove()
}
};
return {
init: function() {
var _dataController$state, _this = this;
var dataController = this.getController("data");
this.callBase();
dataController.pageChanged.add((function() {
_this.scrollToPage(dataController.pageIndex())
}));
dataController.dataSourceChanged.add((function() {
!_this._scrollTop && _this._scrollToCurrentPageOnResize()
}));
null === (_dataController$state = dataController.stateLoaded) || void 0 === _dataController$state ? void 0 : _dataController$state.add((function() {
_this._scrollToCurrentPageOnResize()
}));
this._scrollToCurrentPageOnResize()
},
_scrollToCurrentPageOnResize: function() {
var _this2 = this;
var dataController = this.getController("data");
if (dataController.pageIndex() > 0) {
this.resizeCompleted.add((function resizeHandler() {
_this2.resizeCompleted.remove(resizeHandler);
_this2.scrollToPage(dataController.pageIndex())
}))
}
},
scrollToPage: function(pageIndex) {
var dataController = this._dataController;
var pageSize = dataController ? dataController.pageSize() : 0;
var scrollPosition;
if (isVirtualMode(this) || isAppendMode(this)) {
var itemSize = dataController.getItemSize();
var itemSizes = dataController.getItemSizes();
var itemIndex = pageIndex * pageSize;
scrollPosition = itemIndex * itemSize;
for (var index in itemSizes) {
if (index < itemIndex) {
scrollPosition += itemSizes[index] - itemSize
}
}
} else {
scrollPosition = 0
}
this.scrollTo({
y: scrollPosition,
x: this._scrollLeft
})
},
renderDelayedTemplates: function(e) {
this._updateContentPosition(true);
this.callBase.apply(this, arguments)
},
_renderCore: function(e) {
var that = this;
var startRenderTime = new Date;
that.callBase.apply(that, arguments);
var dataSource = that._dataController._dataSource;
if (dataSource && e) {
var itemCount = e.items ? e.items.length : 20;
var viewportSize = that._dataController.viewportSize() || 20;
if (isVirtualRowRendering(that) && itemCount > 0) {
dataSource._renderTime = (new Date - startRenderTime) * viewportSize / itemCount
} else {
dataSource._renderTime = new Date - startRenderTime
}
}
},
_getRowElements: function(tableElement) {
var $rows = this.callBase(tableElement);
return $rows && $rows.not("." + VIRTUAL_ROW_CLASS)
},
_removeRowsElements: function(contentTable, removeCount, changeType) {
var rowElements = this._getRowElements(contentTable).toArray();
if ("append" === changeType) {
rowElements = rowElements.slice(0, removeCount)
} else {
rowElements = rowElements.slice(-removeCount)
}
var errorHandlingController = this.getController("errorHandling");
rowElements.map((function(rowElement) {
var $rowElement = (0, _renderer.default)(rowElement);
errorHandlingController && errorHandlingController.removeErrorRow($rowElement.next());
$rowElement.remove()
}))
},
_restoreErrorRow: function(contentTable) {
var editingController = this.getController("editing");
editingController && editingController.hasChanges() && this._getRowElements(contentTable).each((function(_, item) {
var rowOptions = (0, _renderer.default)(item).data("options");
if (rowOptions) {
var change = editingController.getChangeByKey(rowOptions.key);
change && editingController._showErrorRow(change)
}
}))
},
_updateContent: function(tableElement, change) {
var $freeSpaceRowElements;
var contentElement = this._findContentElement();
var changeType = change && change.changeType;
if ("append" === changeType || "prepend" === changeType) {
var contentTable = contentElement.children().first();
var $tBodies = this._getBodies(tableElement);
if (1 === $tBodies.length) {
this._getBodies(contentTable)["append" === changeType ? "append" : "prepend"]($tBodies.children())
} else {
$tBodies["append" === changeType ? "appendTo" : "prependTo"](contentTable)
}
tableElement.remove();
$freeSpaceRowElements = this._getFreeSpaceRowElements(contentTable);
removeEmptyRows($freeSpaceRowElements, FREESPACE_CLASS);
if (change.removeCount) {
this._removeRowsElements(contentTable, change.removeCount, changeType)
}
this._restoreErrorRow(contentTable)
} else {
this.callBase.apply(this, arguments)
}
this._updateBottomLoading()
},
_addVirtualRow: function($table, isFixed, location, position) {
if (!position) {
return
}
var $virtualRow = this._createEmptyRow(VIRTUAL_ROW_CLASS, isFixed, position);
$virtualRow = this._wrapRowIfNeed($table, $virtualRow);
this._appendEmptyRow($table, $virtualRow, location)
},
_getRowHeights: function() {
var rowHeights = this._getRowElements(this._tableElement).toArray().map((function(row) {
return (0, _position.getBoundingRect)(row).height
}));
return rowHeights
},
_correctRowHeights: function(rowHeights) {
var dataController = this._dataController;
var dataSource = dataController._dataSource;
var correctedRowHeights = [];
var visibleRows = dataController.getVisibleRows();
var itemSize = 0;
var firstCountableItem = true;
for (var i = 0; i < rowHeights.length; i++) {
var currentItem = visibleRows[i];
if (!(0, _type.isDefined)(currentItem)) {
continue
}
if (isItemCountableByDataSource(currentItem, dataSource)) {
if (firstCountableItem) {
firstCountableItem = false
} else {
correctedRowHeights.push(itemSize);
itemSize = 0
}
}
itemSize += rowHeights[i]
}
itemSize > 0 && correctedRowHeights.push(itemSize);
return correctedRowHeights
},
_updateContentPosition: function(isRender) {
var _this3 = this;
var dataController = this._dataController;
var rowHeight = this._rowHeight || 20;
dataController.viewportItemSize(rowHeight);
if (isVirtualMode(this) || isVirtualRowRendering(this)) {
if (!isRender) {
var rowHeights = this._getRowHeights();
var correctedRowHeights = this._correctRowHeights(rowHeights);
dataController.setContentItemSizes(correctedRowHeights)
}
var top = dataController.getContentOffset("begin");
var bottom = dataController.getContentOffset("end");
var $tables = this.getTableElements();
var $virtualRows = $tables.children("tbody").children("." + VIRTUAL_ROW_CLASS);
removeEmptyRows($virtualRows, VIRTUAL_ROW_CLASS);
$tables.each((function(index, element) {
var isFixed = index > 0;
_this3._isFixedTableRendering = isFixed;
_this3._addVirtualRow((0, _renderer.default)(element), isFixed, "top", top);
_this3._addVirtualRow((0, _renderer.default)(element), isFixed, "bottom", bottom);
_this3._isFixedTableRendering = false
}))
}
},
_isTableLinesDisplaysCorrect: function(table) {
var hasColumnLines = table.find("." + COLUMN_LINES_CLASS).length > 0;
return hasColumnLines === this.option("showColumnLines")
},
_isColumnElementsEqual: function($columns, $virtualColumns) {
var result = $columns.length === $virtualColumns.length;
if (result) {
(0, _iterator.each)($columns, (function(index, element) {
if (element.style.width !== $virtualColumns[index].style.width) {
result = false;
return result
}
}))
}
return result
},
_renderVirtualTableContent: function(container, height) {
var columns = this._columnsController.getVisibleColumns();
var html = this._createColGroup(columns).prop("outerHTML");
var freeSpaceCellsHtml = "";
var columnLinesClass = this.option("showColumnLines") ? COLUMN_LINES_CLASS : "";
var createFreeSpaceRowHtml = function(height) {
return "<tr style='height:" + height + "px;' class='" + FREESPACE_CLASS + " " + ROW_CLASS + " " + columnLinesClass + "' >" + freeSpaceCellsHtml + "</tr>"
};
for (var i = 0; i < columns.length; i++) {
var classes = this._getCellClasses(columns[i]);
var classString = classes.length ? " class='" + classes.join(" ") + "'" : "";
freeSpaceCellsHtml += "<td" + classString + "/>"
}
while (height > PIXELS_LIMIT) {
html += createFreeSpaceRowHtml(PIXELS_LIMIT);
height -= PIXELS_LIMIT
}
html += createFreeSpaceRowHtml(height);
container.addClass(this.addWidgetPrefix(TABLE_CLASS));
container.html(html)
},
_getCellClasses: function(column) {
var classes = [];
var cssClass = column.cssClass;
var isExpandColumn = "expand" === column.command;
cssClass && classes.push(cssClass);
isExpandColumn && classes.push(this.addWidgetPrefix(GROUP_SPACE_CLASS));
return classes
},
_findBottomLoadPanel: function($contentElement) {
var $element = $contentElement || this.element();
var $bottomLoadPanel = $element && $element.find("." + this.addWidgetPrefix(BOTTOM_LOAD_PANEL_CLASS));
if ($bottomLoadPanel && $bottomLoadPanel.length) {
return $bottomLoadPanel
}
},
_updateBottomLoading: function() {
var virtualMode = isVirtualMode(this);
var appendMode = isAppendMode(this);
var showBottomLoading = !this._dataController.hasKnownLastPage() && this._dataController.isLoaded() && (virtualMode || appendMode);
var $contentElement = this._findContentElement();
var bottomLoadPanelElement = this._findBottomLoadPanel($contentElement);
if (showBottomLoading) {
if (!bottomLoadPanelElement) {
(0, _renderer.default)("<div>").addClass(this.addWidgetPrefix(BOTTOM_LOAD_PANEL_CLASS)).append(this._createComponent((0, _renderer.default)("<div>"), _load_indicator.default).$element()).appendTo($contentElement)
}
} else if (bottomLoadPanelElement) {
bottomLoadPanelElement.remove()
}
},
_handleScroll: function(e) {
var that = this;
if (that._hasHeight && that._rowHeight) {
that._dataController.setViewportPosition(e.scrollOffset.top)
}
that.callBase.apply(that, arguments)
},
_needUpdateRowHeight: function(itemsCount) {
var that = this;
return that.callBase.apply(that, arguments) || itemsCount > 0 && that.option("scrolling.mode") === SCROLLING_MODE_INFINITE && that.option("scrolling.rowRenderingMode") !== SCROLLING_MODE_VIRTUAL
},
_updateRowHeight: function() {
this.callBase.apply(this, arguments);
if (this._rowHeight) {
this._updateContentPosition();
var viewportHeight = this._hasHeight ? this.element().outerHeight() : (0, _renderer.default)((0, _window.getWindow)()).outerHeight();
var dataController = this._dataController;
dataController.viewportSize(Math.ceil(viewportHeight / this._rowHeight));
if (this.option(NEW_SCROLLING_MODE) && !(0, _type.isDefined)(dataController._loadViewportParams)) {
var viewportSize = dataController.viewportSize();
var viewportIsNotFilled = viewportSize > dataController.items().length && (isAppendMode(this) || dataController.totalItemsCount() > viewportSize);
viewportIsNotFilled && dataController.loadViewport()
}
}
},
updateFreeSpaceRowHeight: function() {
var result = this.callBase.apply(this, arguments);
if (result) {
this._updateContentPosition()
}
return result
},
setLoading: function(isLoading, messageText) {
var dataController = this._dataController;
var hasBottomLoadPanel = dataController.pageIndex() > 0 && dataController.isLoaded() && !!this._findBottomLoadPanel();
if (this.option(NEW_SCROLLING_MODE) && isLoading && dataController.isViewportChanging()) {
return
}
if (hasBottomLoadPanel) {
isLoading = false
}
this.callBase.call(this, isLoading, messageText)
},
_resizeCore: function() {
var that = this;
var $element = that.element();
that.callBase();
if (that.component.$element() && !that._windowScroll && $element.closest((0, _window.getWindow)().document).length) {
that._windowScroll = (0, _uiGrid_core.subscribeToExternalScrollers)($element, (function(scrollPos) {
if (!that._hasHeight && that._rowHeight) {
that._dataController.setViewportPosition(scrollPos)
}
}), that.component.$element());
that.on("disposing", (function() {
that._windowScroll.dispose()
}))
}
that.loadIfNeed()
},
loadIfNeed: function() {
var _dataController$loadI;
var dataController = this._dataController;
null === dataController || void 0 === dataController ? void 0 : null === (_dataController$loadI = dataController.loadIfNeed) || void 0 === _dataController$loadI ? void 0 : _dataController$loadI.call(dataController)
},
setColumnWidths: function(widths) {
var scrollable = this.getScrollable();
var $content;
this.callBase.apply(this, arguments);
if ("virtual" === this.option("scrolling.mode")) {
$content = scrollable ? (0, _renderer.default)(scrollable.content()) : this.element();
this.callBase(widths, $content.children("." + this.addWidgetPrefix(CONTENT_CLASS)).children(":not(." + this.addWidgetPrefix(TABLE_CONTENT_CLASS) + ")"))
}
},
dispose: function() {
clearTimeout(this._scrollTimeoutID);
this.callBase()
}
}
}();
var virtualScrollingModule = {
defaultOptions: function() {
return {
scrolling: {
timeout: 300,
updateTimeout: 300,
minTimeout: 0,
renderingThreshold: 100,
removeInvisiblePages: true,
rowPageSize: 5,
mode: "standard",
preloadEnabled: false,
rowRenderingMode: "standard",
loadTwoPagesOnStart: false,
newMode: false,
minGap: 1
}
}
},
extenders: {
dataSourceAdapter: VirtualScrollingDataSourceAdapterExtender,
controllers: {
data: function() {
var members = {
_refreshDataSource: function() {
var baseResult = this.callBase.apply(this, arguments) || (new _deferred.Deferred).resolve().promise();
baseResult.done(this.initVirtualRows.bind(this));
return baseResult
},
getRowPageSize: function() {
var rowPageSize = this.option("scrolling.rowPageSize");
var pageSize = this.pageSize();
return pageSize && pageSize < rowPageSize ? pageSize : rowPageSize
},
reload: function() {
var _this4 = this;
var rowsScrollController = this._rowsScrollController || this._dataSource;
var itemIndex = rowsScrollController && rowsScrollController.getItemIndexByPosition();
var result = this.callBase.apply(this, arguments);
return result && result.done((function() {
if (isVirtualMode(_this4) || isVirtualRowRendering(_this4)) {
var rowIndexOffset = _this4.getRowIndexOffset();
var rowIndex = Math.floor(itemIndex) - rowIndexOffset;
var component = _this4.component;
var scrollable = component.getScrollable && component.getScrollable();
var isSortingOperation = _this4.dataSource().operationTypes().sorting;
if (scrollable && !isSortingOperation) {
var rowElement = component.getRowElement(rowIndex);
var $rowElement = rowElement && rowElement[0] && (0, _renderer.default)(rowElement[0]);
var top = $rowElement && $rowElement.position().top;
var isChromeLatest = _browser.default.chrome && _browser.default.version >= 91;
var allowedTopOffset = _browser.default.mozilla || _browser.default.msie || isChromeLatest ? 1 : 0;
if (top > allowedTopOffset) {
top = Math.round(top + $rowElement.outerHeight() * (itemIndex % 1));
scrollable.scrollTo({
y: top
})
}
}
}
}))
},
initVirtualRows: function() {
var _this5 = this;
var virtualRowsRendering = isVirtualRowRendering(this);
if ("virtual" !== this.option("scrolling.mode") && true !== virtualRowsRendering || false === virtualRowsRendering || !this.option("scrolling.rowPageSize")) {
this._visibleItems = null;
this._rowsScrollController = null;
return
}
var pageIndex = !isVirtualMode(this) && this.pageIndex() >= this.pageCount() ? this.pageCount() - 1 : this.pageIndex();
this._rowPageIndex = Math.ceil(pageIndex * this.pageSize() / this.getRowPageSize());
this._uncountableItemCount = 0;
this._visibleItems = this.option(NEW_SCROLLING_MODE) ? null : [];
this._rowsScrollController = new _uiGrid_core.VirtualScrollController(this.component, this._getRowsScrollDataOptions(), true);
this._viewportChanging = false;
this._rowsScrollController.positionChanged.add((function() {
var _this5$_dataSource;
if (_this5.option(NEW_SCROLLING_MODE)) {
_this5._viewportChanging = true;
_this5.loadViewport();
_this5._viewportChanging = false;
return
}
null === (_this5$_dataSource = _this5._dataSource) || void 0 === _this5$_dataSource ? void 0 : _this5$_dataSource.setViewportItemIndex(_this5._rowsScrollController.getViewportItemIndex())
}));
if (this.isLoaded() && !this.option(NEW_SCROLLING_MODE)) {
this._rowsScrollController.load()
}
},
isViewportChanging: function() {
return this._viewportChanging
},
_getRowsScrollDataOptions: function() {
var that = this;
var isItemCountable = function(item) {
return isItemCountableByDataSource(item, that._dataSource)
};
return {
pageSize: function() {
return that.getRowPageSize()
},
totalItemsCount: function() {
if (that.option(NEW_SCROLLING_MODE)) {
return that.totalItemsCount() + that._uncountableItemCount
}
return isVirtualMode(that) ? that.totalItemsCount() : that._items.filter(isItemCountable).length
},
hasKnownLastPage: function() {
return true
},
pageIndex: function(index) {
if (void 0 !== index) {
that._rowPageIndex = index
}
return that._rowPageIndex
},
isLoading: function() {
return that.isLoading()
},
pageCount: function() {
var pageCount = Math.ceil(this.totalItemsCount() / this.pageSize());
return pageCount ? pageCount : 1
},
load: function() {
if (that._rowsScrollController.pageIndex() >= this.pageCount()) {
that._rowPageIndex = this.pageCount() - 1;
that._rowsScrollController.pageIndex(that._rowPageIndex)
}
if (!this.items().length && this.totalItemsCount()) {
return
}
that._rowsScrollController.handleDataChanged((function(change) {
change = change || {};
change.changeType = change.changeType || "refresh";
change.items = change.items || that._visibleItems;
that._visibleItems.forEach((function(item, index) {
item.rowIndex = index
}));
that._fireChanged(change)
}))
},
updateLoading: function() {},
itemsCount: function() {
return this.items().filter(isItemCountable).length
},
correctCount: function(items, count, fromEnd) {
return _correctCount(items, count, fromEnd, (function(item, isNextAfterLast, fromEnd) {
if (item.isNewRow) {
return isNextAfterLast && !fromEnd
}
if (isNextAfterLast && fromEnd) {
return !item.isNewRow
}
return isItemCountable(item)
}))
},
items: function(countableOnly) {
var dataSource = that.dataSource();
var virtualItemsCount = dataSource && dataSource.virtualItemsCount();
var begin = virtualItemsCount ? virtualItemsCount.begin : 0;
var rowPageSize = that.getRowPageSize();
var skip = that._rowPageIndex * rowPageSize - begin;
var take = rowPageSize;
var result = that._items;
if (skip < 0) {
return []
}
if (skip) {
skip = this.correctCount(result, skip);
result = result.slice(skip)
}
if (take) {
take = this.correctCount(result, take);
result = result.slice(0, take)
}
return countableOnly ? result.filter(isItemCountable) : result
},
viewportItems: function(items) {
if (items && !that.option(NEW_SCROLLING_MODE)) {
that._visibleItems = items
}
return that._visibleItems
},
onChanged: function() {},
changingDuration: function(e) {
var dataSource = that.dataSource();
if (dataSource.isLoading() && !that.option(NEW_SCROLLING_MODE)) {
return LOAD_TIMEOUT
}
return (null === dataSource || void 0 === dataSource ? void 0 : dataSource._renderTime) || 0
}
}
},
_updateItemsCore: function(change) {
var _this6 = this;
var delta = this.getRowIndexDelta();
this.callBase.apply(this, arguments);
if (this.option(NEW_SCROLLING_MODE) && isVirtualRowRendering(this)) {
return
}
var rowsScrollController = this._rowsScrollController;
if (rowsScrollController) {
var visibleItems = this._visibleItems;
var isRefresh = "refresh" === change.changeType || change.isLiveUpdate;
if ("append" === change.changeType && change.items && !change.items.length) {
return
}
if (isRefresh || "append" === change.changeType || "prepend" === change.changeType) {
change.cancel = true;
isRefresh && rowsScrollController.reset(true);
rowsScrollController.load()
} else {
if ("update" === change.changeType) {
change.rowIndices.forEach((function(rowIndex, index) {
var changeType = change.changeTypes[index];
var newItem = change.items[index];
if ("update" === changeType) {
visibleItems[rowIndex] = newItem
} else if ("insert" === changeType) {
visibleItems.splice(rowIndex, 0, newItem)
} else if ("remove" === changeType) {
visibleItems.splice(rowIndex, 1)
}
}))
} else {
visibleItems.forEach((function(item, index) {
visibleItems[index] = _this6._items[index + delta] || visibleItems[index]
}));
change.items = visibleItems
}
updateItemIndices(visibleItems)
}
}
},
_updateLoadViewportParams: function() {
this._loadViewportParams = this._rowsScrollController.getViewportParams()
},
_afterProcessItems: function(items, change) {
var _this7 = this;
this._uncountableItemCount = 0;
if ((0, _type.isDefined)(this._loadViewportParams)) {
this._uncountableItemCount = items.filter((function(item) {
return !isItemCountableByDataSource(item, _this7._dataSource)
})).length;
this._updateLoadViewportParams();
var _this$getLoadPagePara = this.getLoadPageParams(),
skipForCurrentPage = _this$getLoadPagePara.skipForCurrentPage;
change.repaintChangesOnly = "refresh" === change.changeType;
return items.slice(skipForCurrentPage, skipForCurrentPage + this._loadViewportParams.take)
}
return this.callBase.apply(this, arguments)
},
_applyChange: function(change) {
var that = this;
var items = change.items;
var changeType = change.changeType;
var removeCount = change.removeCount;
if (removeCount) {
var fromEnd = "prepend" === changeType;
removeCount = _correctCount(that._items, removeCount, fromEnd, (function(item, isNextAfterLast) {
return "data" === item.rowType && !item.isNewRow || "group" === item.rowType && (that._dataSource.isGroupItemCountable(item.data) || isNextAfterLast)
}));
change.removeCount = removeCount
}
switch (changeType) {
case "prepend":
that._items.unshift.apply(that._items, items);
if (removeCount) {
that._items.splice(-removeCount)
}
break;
case "append":
that._items.push.apply(that._items, items);
if (removeCount) {
that._items.splice(0, removeCount)
}
break;
default:
that.callBase(change)
}
},
items: function(allItems) {
return allItems ? this._items : this._visibleItems || this._items
},
getRowIndexDelta: function() {
var visibleItems = this._visibleItems;
var delta = 0;
if (visibleItems && visibleItems[0]) {
delta = this._items.indexOf(visibleItems[0])
}
return delta < 0 ? 0 : delta
},
getRowIndexOffset: function(byLoadedRows) {
var offset = 0;
var dataSource = this.dataSource();
var rowsScrollController = this._rowsScrollController;
var virtualMode = isVirtualMode(this);
var appendMode = isAppendMode(this);
var newMode = this.option(NEW_SCROLLING_MODE);
if (rowsScrollController && !byLoadedRows) {
if (this.option(NEW_SCROLLING_MODE) && (0, _type.isDefined)(this._loadViewportParams)) {
var _this$getLoadPagePara2 = this.getLoadPageParams(),
skipForCurrentPage = _this$getLoadPagePara2.skipForCurrentPage,
pageIndex = _this$getLoadPagePara2.pageIndex;
offset = pageIndex * this.pageSize() + skipForCurrentPage
} else {
offset = rowsScrollController.beginPageIndex() * rowsScrollController.pageSize()
}
} else if ((virtualMode || appendMode && newMode) && dataSource) {
offset = dataSource.beginPageIndex() * dataSource.pageSize()
}
return offset
},
viewportSize: function() {
var rowsScrollController = this._rowsScrollController;
var dataSource = this._dataSource;
var result = null === rowsScrollController || void 0 === rowsScrollController ? void 0 : rowsScrollController.viewportSize.apply(rowsScrollController, a