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: 22.1.9
* Build date: Tue Apr 18 2023
*
* Copyright (c) 2012 - 2023 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
"use strict";
exports.virtualScrollingModule = void 0;
var _size = require("../../core/utils/size");
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 BOTTOM_LOAD_PANEL_CLASS = "bottom-load-panel";
var TABLE_CONTENT_CLASS = "table-content";
var GROUP_SPACE_CLASS = "group-space";
var CONTENT_CLASS = "content";
var FREESPACE_CLASS = "dx-freespace-row";
var COLUMN_LINES_CLASS = "dx-column-lines";
var VIRTUAL_ROW_CLASS = "dx-virtual-row";
var ROW_INSERTED = "dx-row-inserted";
var SCROLLING_MODE_INFINITE = "infinite";
var SCROLLING_MODE_VIRTUAL = "virtual";
var LOAD_TIMEOUT = 300;
var LEGACY_SCROLLING_MODE = "scrolling.legacyMode";
var VISIBLE_PAGE_INDEX = "paging.pageIndex";
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 isVirtualPaging = function(that) {
return isVirtualMode(that) || isAppendMode(that)
};
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._totalCount = -1;
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 (false === this.option(LEGACY_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 (false !== this.option(LEGACY_SCROLLING_MODE)) {
this._isLoading = false;
this.loadingChanged.fire(false)
}
this.callBase.apply(this, arguments)
},
_handleDataChanged: function(e) {
if (false === this.option(LEGACY_SCROLLING_MODE)) {
this._items = this._dataSource.items().slice();
this._totalCount = this._dataSourceTotalCount(true);
this.callBase.apply(this, arguments);
return
}
var callBase = this.callBase.bind(this);
this._virtualScrollController.handleDataChanged(callBase, e)
},
_customizeRemoteOperations: function(options, operationTypes) {
var newMode = false === this.option(LEGACY_SCROLLING_MODE);
var renderAsync = this.option("scrolling.renderAsync");
if (!(0, _type.isDefined)(renderAsync)) {
renderAsync = this._renderTime >= this.option("scrolling.renderingThreshold")
}
if ((isVirtualMode(this) || isAppendMode(this) && newMode) && !operationTypes.reload && (operationTypes.skip || newMode) && !renderAsync) {
options.delay = void 0
}
this.callBase.apply(this, arguments)
},
items: function() {
return this._items
},
_dataSourceTotalCount: function(isBase) {
return false === this.option(LEGACY_SCROLLING_MODE) && isVirtualMode(this) && !isBase ? this._totalCount : this.callBase()
},
itemsCount: function(isBase) {
if (isBase || false === this.option(LEGACY_SCROLLING_MODE)) {
return this.callBase()
}
return this._virtualScrollController.itemsCount()
},
load: function(loadOptions) {
if (false === this.option(LEGACY_SCROLLING_MODE) || loadOptions) {
return this.callBase(loadOptions)
}
return this._virtualScrollController.load()
},
isLoading: function() {
return false === this.option(LEGACY_SCROLLING_MODE) ? this._dataSource.isLoading() : 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 (false === this.option(LEGACY_SCROLLING_MODE)) {
return result
}
this.resetPagesCache();
_updateLoading(this);
return result
},
reload: function() {
this._dataSource.pageIndex(this.pageIndex());
var virtualScrollController = this._virtualScrollController;
if (false !== this.option(LEGACY_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 (false !== this.option(LEGACY_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._totalCountCorrection < 0) {
storeLoadOptions.skip += this._totalCountCorrection
}
}
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();
var pageSize = this.pageSize();
var newMode = false === this.option(LEGACY_SCROLLING_MODE);
var storeLoadOptions = options.storeLoadOptions;
var takeIsDefined = (0, _type.isDefined)(storeLoadOptions.take);
options.loadPageCount = loadPageCount;
if (!options.isCustomLoading && newMode && takeIsDefined && loadPageCount > 1 && pageSize > 0) {
storeLoadOptions.take = loadPageCount * pageSize
}
this.callBase.apply(this, arguments)
},
_loadPageSize: function() {
return this.callBase.apply(this, arguments) * this.loadPageCount()
}
};
["beginPageIndex", "endPageIndex", "pageIndex"].forEach((function(name) {
result[name] = function() {
if (false === this.option(LEGACY_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", "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(pageIndex) {
var scrollTop = _this._scrollTop;
_this.scrollToPage(null !== pageIndex && void 0 !== pageIndex ? pageIndex : dataController.pageIndex());
if (false === _this.option(LEGACY_SCROLLING_MODE) && _this._scrollTop === scrollTop) {
dataController.updateViewport()
}
}));
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) {
var _this3 = this;
this.waitAsyncTemplates().done((function() {
_this3._updateContentPosition(true)
}));
this.callBase.apply(this, arguments)
},
_renderCore: function(e) {
var startRenderTime = new Date;
var deferred = this.callBase.apply(this, arguments);
var dataSource = this._dataController._dataSource;
if (dataSource && e) {
var itemCount = e.items ? e.items.length : 20;
var viewportSize = this._dataController.viewportSize() || 20;
if (_uiGrid_core2.default.isVirtualRowRendering(this) && itemCount > 0 && false !== this.option(LEGACY_SCROLLING_MODE)) {
dataSource._renderTime = (new Date - startRenderTime) * viewportSize / itemCount
} else {
dataSource._renderTime = new Date - startRenderTime
}
}
return deferred
},
_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()
}))
},
_updateContent: function(tableElement, change) {
var _this4 = this;
var $freeSpaceRowElements;
var contentElement = this._findContentElement();
var changeType = change && change.changeType;
var d = (0, _deferred.Deferred)();
var contentTable = contentElement.children().first();
if ("append" === changeType || "prepend" === changeType) {
this.waitAsyncTemplates().done((function() {
var $tBodies = _this4._getBodies(tableElement);
if (1 === $tBodies.length) {
_this4._getBodies(contentTable)["append" === changeType ? "append" : "prepend"]($tBodies.children())
} else {
$tBodies["append" === changeType ? "appendTo" : "prependTo"](contentTable)
}
tableElement.remove();
$freeSpaceRowElements = _this4._getFreeSpaceRowElements(contentTable);
removeEmptyRows($freeSpaceRowElements, FREESPACE_CLASS);
if (change.removeCount) {
_this4._removeRowsElements(contentTable, change.removeCount, changeType)
}
_this4._restoreErrorRow(contentTable);
d.resolve()
})).fail(d.reject)
} else {
this.callBase.apply(this, arguments).done((function() {
if ("update" === changeType) {
_this4._restoreErrorRow(contentTable)
}
d.resolve()
})).fail(d.reject)
}
return d.promise().done((function() {
_this4._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, $virtualRow, location)
},
_updateContentItemSizes: function() {
var rowHeights = this._getRowHeights();
var correctedRowHeights = this._correctRowHeights(rowHeights);
this._dataController.setContentItemSizes(correctedRowHeights)
},
_updateViewportSize: function(viewportHeight, scrollTop) {
if (!(0, _type.isDefined)(viewportHeight)) {
viewportHeight = this._hasHeight ? (0, _size.getOuterHeight)(this.element()) : (0, _size.getOuterHeight)((0, _window.getWindow)())
}
this._dataController.viewportHeight(viewportHeight, scrollTop)
},
_getRowHeights: function() {
var _this$getController, _this$getController$i;
var isPopupEditMode = null === (_this$getController = this.getController("editing")) || void 0 === _this$getController ? void 0 : null === (_this$getController$i = _this$getController.isPopupEditMode) || void 0 === _this$getController$i ? void 0 : _this$getController$i.call(_this$getController);
var rowElements = this._getRowElements(this._tableElement).toArray();
if (isPopupEditMode) {
rowElements = rowElements.filter((function(row) {
return !(0, _renderer.default)(row).hasClass(ROW_INSERTED)
}))
}
return rowElements.map((function(row) {
return (0, _position.getBoundingRect)(row).height
}))
},
_correctRowHeights: function(rowHeights) {
var dataController = this._dataController;
var dataSource = dataController._dataSource;
var correctedRowHeights = [];
var visibleRows = dataController.getVisibleRows();
var itemSize = 0;
var firstCountableItem = true;
var lastLoadIndex = -1;
for (var i = 0; i < rowHeights.length; i++) {
var currentItem = visibleRows[i];
if (!(0, _type.isDefined)(currentItem)) {
continue
}
if (false === this.option(LEGACY_SCROLLING_MODE)) {
if (lastLoadIndex >= 0 && lastLoadIndex !== currentItem.loadIndex) {
correctedRowHeights.push(itemSize);
itemSize = 0
}
lastLoadIndex = currentItem.loadIndex
} else 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 _this5 = this;
var dataController = this._dataController;
var rowHeight = this._rowHeight || 20;
dataController.viewportItemSize(rowHeight);
if (isVirtualMode(this) || _uiGrid_core2.default.isVirtualRowRendering(this)) {
if (!isRender) {
this._updateContentItemSizes()
}
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);
$tables.each((function(index, element) {
var isFixed = index > 0;
var prevFixed = _this5._isFixedTableRendering;
_this5._isFixedTableRendering = isFixed;
_this5._addVirtualRow((0, _renderer.default)(element), isFixed, "top", top);
_this5._addVirtualRow((0, _renderer.default)(element), isFixed, "bottom", bottom);
_this5._isFixedTableRendering = prevFixed
}))
}
},
_isTableLinesDisplaysCorrect: function(table) {
var hasColumnLines = table.find("." + COLUMN_LINES_CLASS).length > 0;
return hasColumnLines === this.option("showColumnLines")
},
_isColumnElementsEqual: function($columns, $virtualColumns) {
var result = $columns.length === $virtualColumns.length;
if (result) {
(0, _iterator.each)($columns, (function(index, element) {
if (element.style.width !== $virtualColumns[index].style.width) {
result = false;
return result
}
}))
}
return result
},
_getCellClasses: function(column) {
var classes = [];
var cssClass = column.cssClass;
var isExpandColumn = "expand" === column.command;
cssClass && classes.push(cssClass);
isExpandColumn && classes.push(this.addWidgetPrefix(GROUP_SPACE_CLASS));
return classes
},
_findBottomLoadPanel: function($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 legacyScrollingMode = true === this.option(LEGACY_SCROLLING_MODE);
var zeroTopPosition = 0 === e.scrollOffset.top;
var isScrollTopChanged = this._scrollTop !== e.scrollOffset.top;
var hasScrolled = isScrollTopChanged || e.forceUpdateScrollPosition;
var isValidScrollTarget = this._hasHeight || !legacyScrollingMode && zeroTopPosition;
if (hasScrolled && isValidScrollTarget && this._rowHeight) {
this._scrollTop = e.scrollOffset.top;
var isVirtualRowRendering = isVirtualMode(this) || "standard" !== this.option("scrolling.rowRenderingMode");
if (isVirtualRowRendering && false === this.option(LEGACY_SCROLLING_MODE)) {
this._updateContentItemSizes();
this._updateViewportSize(null, this._scrollTop)
}
this._dataController.setViewportPosition(e.scrollOffset.top)
}
this.callBase.apply(this, arguments)
},
_needUpdateRowHeight: function(itemsCount) {
return this.callBase.apply(this, arguments) || itemsCount > 0 && isAppendMode(this) && !_uiGrid_core2.default.isVirtualRowRendering(this)
},
_updateRowHeight: function() {
this.callBase.apply(this, arguments);
if (this._rowHeight) {
this._updateContentPosition();
var viewportHeight = this._hasHeight ? (0, _size.getOuterHeight)(this.element()) : (0, _size.getOuterHeight)((0, _window.getWindow)());
var dataController = this._dataController;
if (false === this.option(LEGACY_SCROLLING_MODE)) {
this._updateViewportSize(viewportHeight);
dataController.updateViewport()
} else {
dataController.viewportSize(Math.ceil(viewportHeight / this._rowHeight))
}
}
},
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 (false === this.option(LEGACY_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.$element());
that.on("disposing", (function() {
that._windowScroll.dispose()
}))
}
if (false !== this.option(LEGACY_SCROLLING_MODE)) {
that.loadIfNeed()
}
},
loadIfNeed: function() {
var _dataController$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, $content.children("." + this.addWidgetPrefix(CONTENT_CLASS)).children(":not(." + this.addWidgetPrefix(TABLE_CONTENT_CLASS) + ")"))
}
},
_restoreErrorRow: function() {
if (false === this.option(LEGACY_SCROLLING_MODE)) {
var errorHandling = this.getController("errorHandling");
null === errorHandling || void 0 === errorHandling ? void 0 : errorHandling.removeErrorRow()
}
this.callBase.apply(this, arguments)
},
dispose: function() {
clearTimeout(this._scrollTimeoutID);
this.callBase()
}
}
}();
var virtualScrollingModule = {
defaultOptions: function() {
return {
scrolling: {
timeout: 300,
updateTimeout: 300,
minTimeout: 0,
renderingThreshold: 100,
removeInvisiblePages: true,
rowPageSize: 5,
prerenderedRowChunkSize: 1,
mode: "standard",
preloadEnabled: false,
rowRenderingMode: "standard",
loadTwoPagesOnStart: false,
legacyMode: false,
prerenderedRowCount: 1
}
}
},
extenders: {
dataSourceAdapter: VirtualScrollingDataSourceAdapterExtender,
controllers: {
data: function() {
var members = {
_refreshDataSource: function() {
var baseResult = this.callBase.apply(this, arguments) || (new _deferred.Deferred).resolve().promise();
baseResult.done(this.initVirtualRows.bind(this));
return baseResult
},
_loadDataSource: function() {
if (this._rowsScrollController && isVirtualPaging(this)) {
var _this$_dataSource;
var _ref = (0, _type.isDefined)(this._loadViewportParams) ? this.getLoadPageParams() : {},
loadPageCount = _ref.loadPageCount;
loadPageCount >= 1 && (null === (_this$_dataSource = this._dataSource) || void 0 === _this$_dataSource ? void 0 : _this$_dataSource.loadPageCount(loadPageCount))
}
return this.callBase.apply(this, arguments)
},
getRowPageSize: function() {
var rowPageSize = this.option("scrolling.rowPageSize");
var pageSize = this.pageSize();
return pageSize && pageSize < rowPageSize ? pageSize : rowPageSize
},
reload: function() {
var _this6 = 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(_this6) || _uiGrid_core2.default.isVirtualRowRendering(_this6)) {
var rowIndexOffset = _this6.getRowIndexOffset();
var rowIndex = Math.floor(itemIndex) - rowIndexOffset;
var component = _this6.component;
var scrollable = component.getScrollable && component.getScrollable();
var isSortingOperation = _this6.dataSource().operationTypes().sorting;
if (scrollable && !isSortingOperation && rowIndex >= 0) {
var rowElement = component.getRowElement(rowIndex);
var $rowElement = rowElement && rowElement[0] && (0, _renderer.default)(rowElement[0]);
var top = $rowElement && $rowElement.position().top;
var isChromeLatest = _browser.default.chrome && _browser.default.version >= 91;
var allowedTopOffset = _browser.default.mozilla || isChromeLatest ? 1 : 0;
if (top > allowedTopOffset) {
top = Math.round(top + (0, _size.getOuterHeight)($rowElement) * (itemIndex % 1));
scrollable.scrollTo({
y: top
})
}
}
}
}))
},
initVirtualRows: function() {
var _this7 = this;
var virtualRowsRendering = _uiGrid_core2.default.isVirtualRowRendering(this);
this._allItems = null;
this._loadViewportParams = null;
if ("virtual" !== this.option("scrolling.mode") && true !== virtualRowsRendering || false === virtualRowsRendering || false !== this.option(LEGACY_SCROLLING_MODE) && !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._visibleItems = false === this.option(LEGACY_SCROLLING_MODE) ? null : [];
this._viewportChanging = false;
this._needUpdateViewportAfterLoading = false;
if (!this._rowsScrollController) {
this._rowsScrollController = new _uiGrid_core.VirtualScrollController(this.component, this._getRowsScrollDataOptions(), true);
this._rowsScrollController.positionChanged.add((function() {
var _this7$_dataSource;
if (false === _this7.option(LEGACY_SCROLLING_MODE)) {
_this7._viewportChanging = true;
_this7.loadViewport();
_this7._viewportChanging = false;
return
}
null === (_this7$_dataSource = _this7._dataSource) || void 0 === _this7$_dataSource ? void 0 : _this7$_dataSource.setViewportItemIndex(_this7._rowsScrollController.getViewportItemIndex())
}))
}
if (false === this.option(LEGACY_SCROLLING_MODE)) {
this._updateLoadViewportParams()
}
if (this.isLoaded() && false !== this.option(LEGACY_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()
},
loadedOffset: function() {
var _that$_dataSource;
return isVirtualMode(that) && (null === (_that$_dataSource = that._dataSource) || void 0 === _that$_dataSource ? void 0 : _that$_dataSource.lastLoadOptions().skip) || 0
},
loadedItemCount: function() {
return that._itemCount
},
totalItemsCount: function() {
if (isVirtualPaging(that)) {
return that.totalItemsCount()
}
return false === that.option(LEGACY_SCROLLING_MODE) ? that._itemCount : that._items.filter(isItemCountable).length
},
hasKnownLastPage: function() {
return false === that.option(LEGACY_SCROLLING_MODE) ? that.hasKnownLastPage() : 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(true).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 result = that._items;
if (that.option(LEGACY_SCROLLING_MODE)) {
var dataSource = that.dataSource();
var virtualItemsCount = null === dataSource || void 0 === dataSource ? void 0 : dataSource.virtualItemsCount();
var begin = virtualItemsCount ? virtualItemsCount.begin : 0;
var rowPageSize = that.getRowPageSize();
var skip = that._rowPageIndex * rowPageSize - begin;
var take = rowPageSize;
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 && false !== that.option(LEGACY_SCROLLING_MODE)) {
that._visibleItems = items
}
return that._visibleItems
},
onChanged: function() {},
changingDuration: function(e) {
var dataSource = that.dataSource();
if (null !== dataSource && void 0 !== dataSource && dataSource.isLoading() && false !== that.option(LEGACY_SCROLLING_MODE)) {
return LOAD_TIMEOUT
}
return (null === dataSource || void 0 === dataSource ? void 0 : dataSource._renderTime) || 0
}
}
},
_updateItemsCore: function(change) {
var _this8 = this;
var delta = this.getRowIndexDelta();
this.callBase.apply(this, arguments);
if (false === this.option(LEGACY_SCROLLING_MODE) && _uiGrid_core2.default.isVirtualRowRendering(this)) {
if ("update" === change.changeType && 0 === change.rowIndices.length && change.cancelEmptyChanges) {
change.cancel = true
}
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] = _this8._items[index + delta] || visibleItems[index]
}));
change.items = visibleItems
}
updateItemIndices(visibleItems)
}
}
},
_updateLoadViewportParams: function() {
var viewportParams = this._rowsScrollController.getViewportParams();
var pageSize = this.pageSize();
if (viewportParams && !isVirtualPaging(this) && pageSize > 0) {