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| define(["require", "exports", "@syncfusion/ej2-base", "../../common/base/constant", "../../common/base/css-constant", "../../base/util", "../../common/base/constant"], function (require, exports, ej2_base_1, constant_1, cls, util_1, events) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var VirtualScroll = (function () {
function VirtualScroll(parent) {
this.previousValues = { top: 0, left: 0 };
this.frozenPreviousValues = { top: 0, left: 0 };
this.eventType = '';
this.isFireFox = ej2_base_1.Browser.userAgent.toLowerCase().indexOf('firefox') > -1;
this.parent = parent;
this.addInternalEvents();
}
VirtualScroll.prototype.getModuleName = function () {
return 'virtualscroll';
};
VirtualScroll.prototype.addInternalEvents = function () {
if (this.parent.isDestroyed) {
return;
}
this.parent.on(constant_1.contentReady, this.wireEvents, this);
};
VirtualScroll.prototype.wireEvents = function () {
this.engineModule = this.parent.dataType === 'pivot' ? this.parent.engineModule : this.parent.olapEngineModule;
if (this.parent.displayOption.view !== 'Chart') {
var mCont = this.parent.element.querySelector('.' + cls.CONTENT_VIRTUALTABLE_DIV);
var gridContent = this.parent.element.querySelector('.' + cls.GRID_CONTENT);
var mHdr = this.parent.element.querySelector('.' + cls.MOVABLEHEADER_DIV);
var mScrollBar = gridContent.querySelector('.' + cls.VIRTUALTABLE_DIV);
ej2_base_1.EventHandler.clearEvents(mCont);
Iif (this.isFireFox) {
ej2_base_1.EventHandler.clearEvents(mHdr);
}
Eif (this.engineModule) {
var ele = this.parent.isAdaptive ? mCont : gridContent.querySelector('.' + cls.VIRTUALTABLE_DIV);
ej2_base_1.EventHandler.add(ele, 'scroll touchmove pointermove', this.onHorizondalScroll(mHdr, mCont), this);
ej2_base_1.EventHandler.add(mCont.parentElement, 'scroll wheel touchmove pointermove keyup keydown', this.onVerticalScroll(mCont.parentElement, mCont), this);
Iif (this.isFireFox) {
ej2_base_1.EventHandler.add(ele, 'mouseup touchend scroll', this.common(mHdr, mCont, mCont), this);
if (!this.parent.isAdaptive) {
ej2_base_1.EventHandler.add(mCont.parentElement, 'mouseup touchend scroll', this.common(mHdr, mCont.parentElement, mCont), this);
}
}
else {
ej2_base_1.EventHandler.add(ele, 'mouseup touchend', this.common(mHdr, mCont, mCont), this);
Eif (!this.parent.isAdaptive) {
ej2_base_1.EventHandler.add(mCont.parentElement, 'mouseup touchend', this.common(mHdr, mCont.parentElement, mCont), this);
}
}
ej2_base_1.EventHandler.add(mScrollBar, 'scroll', this.onCustomScrollbarScroll(mCont, mHdr), this);
ej2_base_1.EventHandler.add(mCont, 'scroll', this.onCustomScrollbarScroll(mScrollBar, mHdr), this);
ej2_base_1.EventHandler.add(mHdr, 'scroll', this.onCustomScrollbarScroll(mScrollBar, mCont), this);
ej2_base_1.EventHandler.add(mHdr, 'touchstart pointerdown', this.setPageXY(), this);
ej2_base_1.EventHandler.add(mHdr, 'touchmove pointermove', this.onTouchScroll(mHdr, mCont), this);
ej2_base_1.EventHandler.add(mCont, 'touchstart pointerdown', this.setPageXY(), this);
ej2_base_1.EventHandler.add(mCont, 'touchmove pointermove', this.onTouchScroll(mHdr, mCont), this);
}
this.parent.grid.on('check-scroll-reset', function (args) {
args.cancel = true;
});
this.parent.grid.on('prevent-frozen-scroll-refresh', function (args) {
args.cancel = true;
});
this.parent.grid.isPreventScrollEvent = true;
}
};
VirtualScroll.prototype.onWheelScroll = function (mCont) {
var _this = this;
var element = mCont;
return function (e) {
var top = element.scrollTop + (e.deltaMode === 1 ? e.deltaY * 30 : e.deltaY);
if (_this.frozenPreviousValues.top === top) {
return;
}
e.preventDefault();
_this.frozenPreviousValues.top = top;
_this.eventType = e.type;
};
};
VirtualScroll.prototype.getPointXY = function (e) {
var pageXY = { x: 0, y: 0 };
Eif (!(e.touches && e.touches.length)) {
pageXY.x = e.pageX;
pageXY.y = e.pageY;
}
else {
pageXY.x = e.touches[0].pageX;
pageXY.y = e.touches[0].pageY;
}
return pageXY;
};
VirtualScroll.prototype.onCustomScrollbarScroll = function (mCont, mHdr) {
var _this = this;
var content = mCont;
var header = mHdr;
return function (e) {
var eContent = _this.parent.element.querySelector('.' + cls.CONTENT_CLASS);
Iif (eContent.querySelector('tbody') === null) {
return;
}
var target = e.target;
var left = target.scrollLeft;
if (_this.previousValues.left === left || (_this.isFireFox && target.classList.contains(cls.MOVABLEHEADER_DIV))) {
return;
}
content.scrollLeft = left;
header.scrollLeft = left;
Iif (_this.parent.isDestroyed) {
return;
}
};
};
VirtualScroll.prototype.onTouchScroll = function (mHdr, mCont) {
var _this = this;
var element = mCont;
return function (e) {
if (e.pointerType === 'mouse') {
return;
}
var pageXY = _this.getPointXY(e);
var top = _this.parent.element.querySelector('.' + cls.GRID_CLASS + ' .' + cls.CONTENT_CLASS).scrollTop +
(_this.pageXY.y - pageXY.y);
var ele = _this.parent.isAdaptive ? mCont : element.parentElement.parentElement.querySelector('.' + cls.VIRTUALTABLE_DIV);
var left = ele.scrollLeft + (_this.pageXY.x - pageXY.x);
if (_this.frozenPreviousValues.left === left || left < 0) {
return;
}
mHdr.scrollLeft = left;
ele.scrollLeft = left;
_this.pageXY.x = pageXY.x;
_this.frozenPreviousValues.left = left;
if (_this.frozenPreviousValues.top === top || top < 0) {
return;
}
_this.pageXY.y = pageXY.y;
_this.frozenPreviousValues.top = top;
_this.eventType = e.type;
};
};
VirtualScroll.prototype.update = function (top, left, e, ele, mHdr, mCont) {
var _this = this;
var virtualTable = this.parent.element.querySelector('.' + cls.CONTENT_VIRTUALTABLE_DIV);
this.parent.isScrolling = true;
var engine = this.parent.dataType === 'pivot' ? this.parent.engineModule : this.parent.olapEngineModule;
var args = {
dataSourceSettings: util_1.PivotUtil.getClonedDataSourceSettings(this.parent.dataSourceSettings)
};
var enableOptimizedRendering = this.parent.virtualScrollSettings && this.parent.virtualScrollSettings.allowSinglePage && this.parent.dataType === 'pivot';
if (this.parent.pageSettings && engine.pageSettings) {
if (this.direction === 'vertical') {
var vScrollPos = mCont.parentElement.scrollHeight - (top + mCont.parentElement.offsetHeight);
var rowValues = this.parent.dataType === 'pivot' ?
(this.parent.dataSourceSettings.valueAxis === 'row' ? this.parent.dataSourceSettings.values.length : 1) : 1;
var exactSize = (this.parent.pageSettings.rowPageSize * rowValues * this.parent.gridSettings.rowHeight);
var section = Math.ceil(top / exactSize);
section += enableOptimizedRendering && vScrollPos <= 0 ? 1 : 0;
if (((this.parent.scrollPosObject.vertical === section || engine.pageSettings.rowPageSize >= engine.rowCount) ||
(virtualTable && (virtualTable.scrollHeight < (virtualTable.parentElement.clientHeight * 3)))) &&
!enableOptimizedRendering) {
return;
}
this.parent.actionObj.actionName = events.verticalScroll;
Iif (enableOptimizedRendering && this.parent.grid && this.parent.grid.element.querySelector('.e-spinner-inner')) {
ej2_base_1.addClass([this.parent.grid.element.querySelector('.e-spinner-inner')], [cls.PIVOT_HIDE_LOADER]);
}
this.parent.actionBeginMethod();
Eif (!enableOptimizedRendering) {
this.parent.showWaitingPopup();
}
this.parent.scrollPosObject.vertical = section;
this.parent.pageSettings.currentRowPage = engine.pageSettings.currentRowPage = section > 1 ? section : 1;
var rowStartPos_1 = 0;
this.parent.trigger(events.enginePopulating, args, function () {
if (_this.parent.dataType === 'pivot') {
Iif (_this.parent.dataSourceSettings.mode === 'Server') {
_this.parent.getEngine('onScroll', null, null, null, null, null, null);
}
else {
_this.parent.engineModule.generateGridData(_this.parent.dataSourceSettings, true, false, _this.parent.engineModule.headerCollection);
rowStartPos_1 = _this.parent.engineModule.rowStartPos;
}
}
else {
_this.parent.olapEngineModule.scrollPage();
rowStartPos_1 = _this.parent.olapEngineModule.pageRowStartPos;
}
_this.enginePopulatedEventMethod(engine);
});
var exactPage = Math.ceil(rowStartPos_1 / (this.parent.pageSettings.rowPageSize * rowValues));
var pos = exactSize * exactPage -
(engine.rowFirstLvl * rowValues * this.parent.gridSettings.rowHeight);
this.parent.scrollPosObject.verticalSection = pos;
}
else {
var hScrollPos = ele.scrollWidth - (ele.scrollLeft + ele.offsetWidth);
var colValues = this.parent.dataType === 'pivot' ?
(this.parent.dataSourceSettings.valueAxis === 'column' ? this.parent.dataSourceSettings.values.length : 1) : 1;
var exactSize = (this.parent.pageSettings.columnPageSize *
colValues * this.parent.gridSettings.columnWidth);
var section = Math.ceil(Math.abs(left) / exactSize);
var enableOptimizedRendering_1 = this.parent.virtualScrollSettings && this.parent.virtualScrollSettings.allowSinglePage && this.parent.dataType === 'pivot';
section += enableOptimizedRendering_1 && hScrollPos <= 0 ? 1 : 0;
if ((this.parent.scrollPosObject.horizontal === section || (virtualTable && (virtualTable.scrollWidth <
(virtualTable.parentElement.clientWidth * 3)))) && !enableOptimizedRendering_1) {
return;
}
this.parent.actionObj.actionName = events.horizontalScroll;
Iif (enableOptimizedRendering_1 && this.parent.grid && this.parent.grid.element.querySelector('.e-spinner-inner')) {
ej2_base_1.addClass([this.parent.grid.element.querySelector('.e-spinner-inner')], [cls.PIVOT_HIDE_LOADER]);
ej2_base_1.removeClass([mHdr, mCont], ['e-virtual-pivot-content']);
}
this.parent.actionBeginMethod();
Eif (!enableOptimizedRendering_1) {
this.parent.showWaitingPopup();
}
var pivot_1 = this.parent;
pivot_1.scrollPosObject.horizontal = section;
this.parent.pageSettings.currentColumnPage = engine.pageSettings.currentColumnPage = section > 1 ? section : 1;
var colStartPos_1 = 0;
this.parent.trigger(events.enginePopulating, args, function () {
Eif (pivot_1.dataType === 'pivot') {
Iif (_this.parent.dataSourceSettings.mode === 'Server') {
_this.parent.getEngine('onScroll', null, null, null, null, null, null);
}
else {
pivot_1.engineModule.generateGridData(pivot_1.dataSourceSettings, true, false, pivot_1.engineModule.headerCollection);
colStartPos_1 = pivot_1.engineModule.colStartPos;
}
}
else {
pivot_1.olapEngineModule.scrollPage();
colStartPos_1 = pivot_1.olapEngineModule.pageColStartPos;
}
_this.enginePopulatedEventMethod(engine);
});
var exactPage = Math.ceil(colStartPos_1 / (pivot_1.pageSettings.columnPageSize * colValues));
var pos = exactSize * exactPage - (engine.colFirstLvl *
colValues * pivot_1.gridSettings.columnWidth);
pivot_1.scrollPosObject.horizontalSection = pos;
}
this.parent.actionObj.actionName = this.parent.getActionCompleteName();
Eif (this.parent.actionObj.actionName) {
this.parent.actionCompleteMethod();
}
}
};
VirtualScroll.prototype.enginePopulatedEventMethod = function (engine, control) {
var _this = this;
var pivot = control ? control : this.parent;
var eventArgs = {
dataSourceSettings: pivot.dataSourceSettings,
pivotValues: engine.pivotValues
};
pivot.trigger(events.enginePopulated, eventArgs, function (observedArgs) {
_this.parent.pivotValues = observedArgs.pivotValues;
});
};
VirtualScroll.prototype.setPageXY = function () {
var _this = this;
return function (e) {
Iif (e.pointerType === 'mouse') {
return;
}
_this.pageXY = _this.getPointXY(e);
};
};
VirtualScroll.prototype.common = function (mHdr, mCont, fCont) {
var _this = this;
return function (e) {
var ele = _this.parent.isAdaptive ? mCont :
ej2_base_1.closest(mCont, '.' + cls.GRID_CONTENT).querySelector('.' + cls.VIRTUALTABLE_DIV);
var enableOptimizedRendering = _this.parent.virtualScrollSettings && _this.parent.virtualScrollSettings.allowSinglePage && _this.parent.dataType === 'pivot';
Iif (enableOptimizedRendering) {
if (_this.direction === 'vertical') {
if (_this.parent.element.querySelector('.' + cls.PIVOT_CONTENT_LOADER)) {
ej2_base_1.addClass([fCont], ['e-virtual-pivot-content']);
ej2_base_1.removeClass([_this.parent.element.querySelector('.' + cls.PIVOT_CONTENT_LOADER)], [cls.PIVOT_HIDE_LOADER]);
}
}
else {
if (_this.parent.element.querySelector('.' + cls.PIVOT_CONTENT_LOADER)) {
ej2_base_1.addClass([mHdr, mCont], ['e-virtual-pivot-content']);
ej2_base_1.removeClass([_this.parent.element.querySelector('.' + cls.PIVOT_CONTENT_LOADER)], [cls.PIVOT_HIDE_LOADER]);
}
}
}
_this.update(_this.parent.element.querySelector('.' + cls.GRID_CLASS + ' .' + cls.CONTENT_CLASS).scrollTop * _this.parent.verticalScrollScale, ele.scrollLeft * _this.parent.horizontalScrollScale, e, ele, mHdr, mCont);
};
};
VirtualScroll.prototype.onHorizondalScroll = function (mHdr, mCont) {
var _this = this;
var timeOutObj;
var ele = this.parent.isAdaptive ? mCont : ej2_base_1.closest(mCont, '.' + cls.GRID_CONTENT).querySelector('.' + cls.VIRTUALTABLE_DIV);
var eleScrollLeft = Math.abs(ele.scrollLeft);
var left = eleScrollLeft * this.parent.horizontalScrollScale;
var horiOffset = left - this.parent.scrollPosObject.horizontalSection - eleScrollLeft;
horiOffset = this.parent.enableRtl ? horiOffset : -horiOffset;
if (ele.style.display !== 'none') {
this.alignFreezedCells(horiOffset, false);
}
return function (e) {
eleScrollLeft = Math.abs(ele.scrollLeft);
left = eleScrollLeft * _this.parent.horizontalScrollScale;
Iif (e.type === 'wheel' || e.type === 'touchmove' || _this.eventType === 'wheel' || _this.eventType === 'touchmove') {
clearTimeout(timeOutObj);
timeOutObj = setTimeout(function () {
left = e.type === 'touchmove' ? eleScrollLeft : left;
_this.update(mCont.parentElement.scrollTop * _this.parent.verticalScrollScale, left, e, ele, mHdr, mCont);
}, 300);
}
if (_this.previousValues.left === left) {
return;
}
_this.parent.scrollDirection = _this.direction = 'horizondal';
horiOffset = left - _this.parent.scrollPosObject.horizontalSection - eleScrollLeft;
horiOffset = _this.parent.enableRtl ? horiOffset : -horiOffset;
var vertiOffset = mCont.querySelector('.' + cls.TABLE).style.transform.split(',').length > 1 ?
mCont.querySelector('.' + cls.TABLE).style.transform.split(',')[1].trim() : '0px)';
Eif (eleScrollLeft < _this.parent.scrollerBrowserLimit) {
ej2_base_1.setStyleAttribute(mCont.querySelector('.' + cls.TABLE), {
transform: 'translate(' + horiOffset + 'px,' + vertiOffset
});
ej2_base_1.setStyleAttribute(mHdr.querySelector('.' + cls.TABLE), {
transform: 'translate(' + horiOffset + 'px,' + 0 + 'px)'
});
_this.alignFreezedCells(horiOffset, false);
}
var excessMove = _this.parent.scrollPosObject.horizontalSection > left ?
-(_this.parent.scrollPosObject.horizontalSection - left) : ((left + (mHdr.offsetWidth -
mHdr.querySelector('.e-headercell.e-leftfreeze').offsetWidth)) -
(_this.parent.scrollPosObject.horizontalSection + (mCont.querySelector('.' + cls.TABLE).offsetWidth -
mCont.querySelector('.' + cls.TABLE).querySelector('.e-leftfreeze.e-rowsheader').offsetWidth)));
var notLastPage = Math.ceil(_this.parent.scrollPosObject.horizontalSection / _this.parent.horizontalScrollScale) <
_this.parent.scrollerBrowserLimit;
if (_this.parent.scrollPosObject.horizontalSection > left ? true : (excessMove > 1 && notLastPage)) {
var enableOptimizedRendering = _this.parent.virtualScrollSettings && _this.parent.virtualScrollSettings.allowSinglePage && _this.parent.dataType === 'pivot';
Iif (enableOptimizedRendering && _this.parent.element.querySelector('.' + cls.PIVOT_CONTENT_LOADER)) {
ej2_base_1.addClass([mHdr, mCont], ['e-virtual-pivot-content']);
ej2_base_1.removeClass([_this.parent.element.querySelector('.' + cls.PIVOT_CONTENT_LOADER)], [cls.PIVOT_HIDE_LOADER]);
}
Eif (left > mHdr.clientWidth) {
Eif (_this.parent.scrollPosObject.left < 1) {
_this.parent.scrollPosObject.left = mHdr.clientWidth;
}
_this.parent.scrollPosObject.left = _this.parent.scrollPosObject.left - 50;
excessMove = _this.parent.scrollPosObject.horizontalSection > left ?
(excessMove - _this.parent.scrollPosObject.left) : (excessMove + _this.parent.scrollPosObject.left);
}
else {
excessMove = -_this.parent.scrollPosObject.horizontalSection;
}
horiOffset = -((left - (_this.parent.scrollPosObject.horizontalSection + excessMove) - ej2_base_1.closest(mCont, '.' + cls.GRID_CONTENT).querySelector('.' + cls.VIRTUALTABLE_DIV).scrollLeft));
var vWidth = (_this.parent.gridSettings.columnWidth * _this.engineModule.columnCount);
Iif (vWidth > _this.parent.scrollerBrowserLimit) {
_this.parent.horizontalScrollScale = vWidth / _this.parent.scrollerBrowserLimit;
vWidth = _this.parent.scrollerBrowserLimit;
}
Iif (horiOffset > vWidth && horiOffset > left) {
horiOffset = left;
excessMove = 0;
}
ej2_base_1.setStyleAttribute(mCont.querySelector('.' + cls.TABLE), {
transform: 'translate(' + horiOffset + 'px,' + vertiOffset
});
ej2_base_1.setStyleAttribute(mHdr.querySelector('.' + cls.TABLE), {
transform: 'translate(' + horiOffset + 'px,' + 0 + 'px)'
});
_this.alignFreezedCells(horiOffset, false);
_this.parent.scrollPosObject.horizontalSection = _this.parent.scrollPosObject.horizontalSection + excessMove;
}
var hScrollPos = (ele.scrollWidth - (eleScrollLeft + (ele.offsetWidth -
_this.parent.element.querySelector('.' + cls.GRID_CLASS)
.querySelector('.' + cls.HEADERCELL + '.' + cls.FREEZED_CELL).offsetWidth)));
Iif (hScrollPos <= 0) {
var virtualDiv = mCont.querySelector('.' + cls.VIRTUALTRACK_DIV);
virtualDiv.style.display = 'none';
var mCntScrollPos = (mCont.scrollWidth - (mCont.scrollLeft + mCont.offsetWidth));
virtualDiv.style.display = '';
var mCntVScrollPos = (mCont.scrollWidth - (mCont.scrollLeft + mCont.offsetWidth));
_this.parent.scrollPosObject.horizontalSection -= mCntScrollPos > hScrollPos ? mCntScrollPos : -mCntVScrollPos;
horiOffset = (eleScrollLeft > _this.parent.scrollerBrowserLimit) ?
Number(mCont.querySelector('.' + cls.TABLE).style.transform.split(',')[0].split('px')[0].trim()) :
-(((eleScrollLeft * _this.parent.horizontalScrollScale) -
_this.parent.scrollPosObject.horizontalSection - eleScrollLeft));
ej2_base_1.setStyleAttribute(mCont.querySelector('.' + cls.TABLE), {
transform: 'translate(' + horiOffset + 'px,' + vertiOffset
});
ej2_base_1.setStyleAttribute(mHdr.querySelector('.' + cls.TABLE), {
transform: 'translate(' + horiOffset + 'px,' + 0 + 'px)'
});
_this.alignFreezedCells(horiOffset, false);
}
_this.previousValues.left = left;
_this.frozenPreviousValues.left = left;
_this.eventType = '';
mHdr.scrollLeft = ele.scrollLeft;
mCont.scrollLeft = ele.scrollLeft;
};
};
VirtualScroll.prototype.alignFreezedCells = function (horiOffset, isParentCells) {
for (var i = 0, j = this.parent.element.querySelectorAll('.' + cls.FREEZED_CELL); i < j.length; i++) {
if (isParentCells) {
if (this.parent.enableRtl) {
j[i].style.right = -horiOffset + 'px';
}
else {
j[i].style.left = horiOffset + 'px';
}
}
else {
Iif (this.parent.enableRtl) {
j[i].style.right = (Number(horiOffset)) + 'px';
}
else {
j[i].style.left = (Number(-horiOffset)) + 'px';
}
}
}
};
VirtualScroll.prototype.onVerticalScroll = function (mCont, fCont) {
var _this = this;
var timeOutObj;
var virtualTableElement = mCont.querySelector('.' + cls.CONTENT_VIRTUALTABLE_DIV) ?
mCont.querySelector('.' + cls.CONTENT_VIRTUALTABLE_DIV) : mCont;
return function (e) {
if (_this.parent.isAdaptive || (virtualTableElement.scrollHeight > (virtualTableElement.parentElement.clientHeight * 3))) {
var top_1 = mCont.scrollTop * _this.parent.verticalScrollScale;
if (e.type === 'wheel' || e.type === 'touchmove' || _this.eventType === 'wheel' || _this.eventType === 'touchmove' || e.type === 'keyup' || e.type === 'keydown') {
var ele_1 = _this.parent.isAdaptive ? mCont : ej2_base_1.closest(mCont, '.' + cls.GRID_CONTENT).querySelector('.' + cls.VIRTUALTABLE_DIV);
clearTimeout(timeOutObj);
timeOutObj = setTimeout(function () {
var scrollLeft = 0;
Iif (_this.parent.isAdaptive) {
var contentTable = ele_1.querySelector('.' + cls.CONTENT_VIRTUALTABLE_DIV);
scrollLeft = (ele_1.scrollLeft === contentTable.scrollLeft) ? ele_1.scrollLeft :
contentTable.scrollLeft;
}
else {
scrollLeft = ele_1.scrollLeft;
}
_this.update(mCont.scrollTop * _this.parent.verticalScrollScale, scrollLeft * _this.parent.horizontalScrollScale, e, ele_1, null, mCont);
}, 300);
}
if (_this.previousValues.top === top_1) {
return;
}
Iif (_this.parent.scrollPosObject.horizontalSection < 0) {
_this.parent.scrollPosObject.horizontalSection = 0;
}
_this.parent.scrollDirection = _this.direction = 'vertical';
var vertiOffset = -((top_1 - _this.parent.scrollPosObject.verticalSection - mCont.scrollTop));
var horiOffset = mCont.querySelector('.' + cls.TABLE).style.transform.split(',')[0].trim();
if (vertiOffset > _this.parent.virtualDiv.clientHeight) {
vertiOffset = _this.parent.virtualDiv.clientHeight;
}
Eif (mCont.scrollTop < _this.parent.scrollerBrowserLimit) {
ej2_base_1.setStyleAttribute(mCont.querySelector('.' + cls.TABLE), {
transform: 'translate(' + 0 + 'px,' + vertiOffset + 'px)'
});
ej2_base_1.setStyleAttribute(mCont.querySelector('.' + cls.TABLE), {
transform: horiOffset + ',' + vertiOffset + 'px)'
});
}
var excessMove = _this.parent.scrollPosObject.verticalSection > top_1 ?
-(_this.parent.scrollPosObject.verticalSection - top_1) : ((top_1 + mCont.clientHeight) -
(_this.parent.scrollPosObject.verticalSection + mCont.querySelector('.' + cls.TABLE).offsetHeight));
var notLastPage = Math.ceil(_this.parent.scrollPosObject.verticalSection / _this.parent.verticalScrollScale) <
_this.parent.scrollerBrowserLimit;
if (_this.parent.scrollPosObject.verticalSection > top_1 ? true : (excessMove > 1 && notLastPage)) {
var enableOptimizedRendering = _this.parent.virtualScrollSettings && _this.parent.virtualScrollSettings.allowSinglePage && _this.parent.dataType === 'pivot';
Iif (enableOptimizedRendering && _this.parent.element.querySelector('.' + cls.PIVOT_CONTENT_LOADER)) {
ej2_base_1.addClass([fCont], ['e-virtual-pivot-content']);
ej2_base_1.removeClass([_this.parent.element.querySelector('.' + cls.PIVOT_CONTENT_LOADER)], [cls.PIVOT_HIDE_LOADER]);
}
Eif (top_1 > mCont.clientHeight) {
Eif (_this.parent.scrollPosObject.top < 1) {
_this.parent.scrollPosObject.top = mCont.clientHeight;
}
_this.parent.scrollPosObject.top = _this.parent.scrollPosObject.top - 50;
excessMove = _this.parent.scrollPosObject.verticalSection > top_1 ?
(excessMove - _this.parent.scrollPosObject.top) : (excessMove + _this.parent.scrollPosObject.top);
}
else {
excessMove = -_this.parent.scrollPosObject.verticalSection;
}
var movableTable = _this.parent.element.querySelector('.' + cls.CONTENT_CLASS).querySelector('.' + cls.TABLE);
vertiOffset = -((top_1 - (_this.parent.scrollPosObject.verticalSection + excessMove) - mCont.scrollTop));
var vHeight = (_this.parent.gridSettings.rowHeight * _this.engineModule.rowCount + 0.1
- movableTable.clientHeight);
Iif (vHeight > _this.parent.scrollerBrowserLimit) {
_this.parent.verticalScrollScale = vHeight / _this.parent.scrollerBrowserLimit;
vHeight = _this.parent.scrollerBrowserLimit;
}
Iif (vertiOffset > vHeight && vertiOffset > top_1) {
vertiOffset = top_1;
excessMove = 0;
}
Iif (vertiOffset > _this.parent.virtualDiv.clientHeight) {
vertiOffset = _this.parent.virtualDiv.clientHeight;
}
ej2_base_1.setStyleAttribute(mCont.querySelector('.' + cls.TABLE), {
transform: 'translate(' + 0 + 'px,' + vertiOffset + 'px)'
});
ej2_base_1.setStyleAttribute(mCont.querySelector('.' + cls.TABLE), {
transform: horiOffset + ',' + vertiOffset + 'px)'
});
_this.parent.scrollPosObject.verticalSection = _this.parent.scrollPosObject.verticalSection + excessMove;
}
_this.previousValues.top = top_1;
_this.frozenPreviousValues.top = top_1;
_this.eventType = '';
}
};
};
VirtualScroll.prototype.removeInternalEvents = function () {
if (this.parent.isDestroyed) {
return;
}
this.parent.off(constant_1.contentReady, this.wireEvents);
};
VirtualScroll.prototype.destroy = function () {
this.removeInternalEvents();
};
return VirtualScroll;
}());
exports.VirtualScroll = VirtualScroll;
});
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