primevue
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PrimeVue is an open source UI library for Vue featuring a rich set of 80+ components, a theme designer, various theme alternatives such as Material, Bootstrap, Tailwind, premium templates and professional support. In addition, it integrates with PrimeBloc
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JavaScript
import SpinnerIcon from 'primevue/icons/spinner';
import { DomHandler } from 'primevue/utils';
import BaseComponent from 'primevue/basecomponent';
import VirtualScrollerStyle from 'primevue/virtualscroller/style';
import { resolveComponent, openBlock, createElementBlock, mergeProps, renderSlot, createElementVNode, Fragment, renderList, createCommentVNode, createVNode } from 'vue';
var script$1 = {
name: 'BaseVirtualScroller',
"extends": BaseComponent,
props: {
id: {
type: String,
"default": null
},
style: null,
"class": null,
items: {
type: Array,
"default": null
},
itemSize: {
type: [Number, Array],
"default": 0
},
scrollHeight: null,
scrollWidth: null,
orientation: {
type: String,
"default": 'vertical'
},
numToleratedItems: {
type: Number,
"default": null
},
delay: {
type: Number,
"default": 0
},
resizeDelay: {
type: Number,
"default": 10
},
lazy: {
type: Boolean,
"default": false
},
disabled: {
type: Boolean,
"default": false
},
loaderDisabled: {
type: Boolean,
"default": false
},
columns: {
type: Array,
"default": null
},
loading: {
type: Boolean,
"default": false
},
showSpacer: {
type: Boolean,
"default": true
},
showLoader: {
type: Boolean,
"default": false
},
tabindex: {
type: Number,
"default": 0
},
inline: {
type: Boolean,
"default": false
},
step: {
type: Number,
"default": 0
},
appendOnly: {
type: Boolean,
"default": false
},
autoSize: {
type: Boolean,
"default": false
}
},
style: VirtualScrollerStyle,
provide: function provide() {
return {
$parentInstance: this
};
},
beforeMount: function beforeMount() {
VirtualScrollerStyle.loadStyle();
}
};
function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
function ownKeys(e, r) { var t = Object.keys(e); if (Object.getOwnPropertySymbols) { var o = Object.getOwnPropertySymbols(e); r && (o = o.filter(function (r) { return Object.getOwnPropertyDescriptor(e, r).enumerable; })), t.push.apply(t, o); } return t; }
function _objectSpread(e) { for (var r = 1; r < arguments.length; r++) { var t = null != arguments[r] ? arguments[r] : {}; r % 2 ? ownKeys(Object(t), !0).forEach(function (r) { _defineProperty(e, r, t[r]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) { Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r)); }); } return e; }
function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == _typeof(i) ? i : String(i); }
function _toPrimitive(t, r) { if ("object" != _typeof(t) || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != _typeof(i)) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); }
var script = {
name: 'VirtualScroller',
"extends": script$1,
emits: ['update:numToleratedItems', 'scroll', 'scroll-index-change', 'lazy-load'],
data: function data() {
return {
first: this.isBoth() ? {
rows: 0,
cols: 0
} : 0,
last: this.isBoth() ? {
rows: 0,
cols: 0
} : 0,
page: this.isBoth() ? {
rows: 0,
cols: 0
} : 0,
numItemsInViewport: this.isBoth() ? {
rows: 0,
cols: 0
} : 0,
lastScrollPos: this.isBoth() ? {
top: 0,
left: 0
} : 0,
d_numToleratedItems: this.numToleratedItems,
d_loading: this.loading,
loaderArr: [],
spacerStyle: {},
contentStyle: {}
};
},
element: null,
content: null,
lastScrollPos: null,
scrollTimeout: null,
resizeTimeout: null,
defaultWidth: 0,
defaultHeight: 0,
defaultContentWidth: 0,
defaultContentHeight: 0,
isRangeChanged: false,
lazyLoadState: {},
resizeListener: null,
initialized: false,
watch: {
numToleratedItems: function numToleratedItems(newValue) {
this.d_numToleratedItems = newValue;
},
loading: function loading(newValue, oldValue) {
if (this.lazy && newValue !== oldValue && newValue !== this.d_loading) {
this.d_loading = newValue;
}
},
items: function items(newValue, oldValue) {
if (!oldValue || oldValue.length !== (newValue || []).length) {
this.init();
this.calculateAutoSize();
}
},
itemSize: function itemSize() {
this.init();
this.calculateAutoSize();
},
orientation: function orientation() {
this.lastScrollPos = this.isBoth() ? {
top: 0,
left: 0
} : 0;
},
scrollHeight: function scrollHeight() {
this.init();
this.calculateAutoSize();
},
scrollWidth: function scrollWidth() {
this.init();
this.calculateAutoSize();
}
},
mounted: function mounted() {
this.viewInit();
this.lastScrollPos = this.isBoth() ? {
top: 0,
left: 0
} : 0;
this.lazyLoadState = this.lazyLoadState || {};
},
updated: function updated() {
!this.initialized && this.viewInit();
},
unmounted: function unmounted() {
this.unbindResizeListener();
this.initialized = false;
},
methods: {
viewInit: function viewInit() {
if (DomHandler.isVisible(this.element)) {
this.setContentEl(this.content);
this.init();
this.bindResizeListener();
this.defaultWidth = DomHandler.getWidth(this.element);
this.defaultHeight = DomHandler.getHeight(this.element);
this.defaultContentWidth = DomHandler.getWidth(this.content);
this.defaultContentHeight = DomHandler.getHeight(this.content);
this.initialized = true;
}
},
init: function init() {
if (!this.disabled) {
this.setSize();
this.calculateOptions();
this.setSpacerSize();
}
},
isVertical: function isVertical() {
return this.orientation === 'vertical';
},
isHorizontal: function isHorizontal() {
return this.orientation === 'horizontal';
},
isBoth: function isBoth() {
return this.orientation === 'both';
},
scrollTo: function scrollTo(options) {
this.lastScrollPos = this.both ? {
top: 0,
left: 0
} : 0;
this.element && this.element.scrollTo(options);
},
scrollToIndex: function scrollToIndex(index) {
var _this = this;
var behavior = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'auto';
var both = this.isBoth();
var horizontal = this.isHorizontal();
var first = this.first;
var _this$calculateNumIte = this.calculateNumItems(),
numToleratedItems = _this$calculateNumIte.numToleratedItems;
var contentPos = this.getContentPosition();
var itemSize = this.itemSize;
var calculateFirst = function calculateFirst() {
var _index = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 0;
var _numT = arguments.length > 1 ? arguments[1] : undefined;
return _index <= _numT ? 0 : _index;
};
var calculateCoord = function calculateCoord(_first, _size, _cpos) {
return _first * _size + _cpos;
};
var scrollTo = function scrollTo() {
var left = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 0;
var top = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;
return _this.scrollTo({
left: left,
top: top,
behavior: behavior
});
};
var newFirst = both ? {
rows: 0,
cols: 0
} : 0;
var isRangeChanged = false;
if (both) {
newFirst = {
rows: calculateFirst(index[0], numToleratedItems[0]),
cols: calculateFirst(index[1], numToleratedItems[1])
};
scrollTo(calculateCoord(newFirst.cols, itemSize[1], contentPos.left), calculateCoord(newFirst.rows, itemSize[0], contentPos.top));
isRangeChanged = newFirst.rows !== first.rows || newFirst.cols !== first.cols;
} else {
newFirst = calculateFirst(index, numToleratedItems);
horizontal ? scrollTo(calculateCoord(newFirst, itemSize, contentPos.left), 0) : scrollTo(0, calculateCoord(newFirst, itemSize, contentPos.top));
isRangeChanged = newFirst !== first;
}
this.isRangeChanged = isRangeChanged;
this.first = newFirst;
},
scrollInView: function scrollInView(index, to) {
var _this2 = this;
var behavior = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 'auto';
if (to) {
var both = this.isBoth();
var horizontal = this.isHorizontal();
var _this$getRenderedRang = this.getRenderedRange(),
first = _this$getRenderedRang.first,
viewport = _this$getRenderedRang.viewport;
var scrollTo = function scrollTo() {
var left = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 0;
var top = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;
return _this2.scrollTo({
left: left,
top: top,
behavior: behavior
});
};
var isToStart = to === 'to-start';
var isToEnd = to === 'to-end';
if (isToStart) {
if (both) {
if (viewport.first.rows - first.rows > index[0]) {
scrollTo(viewport.first.cols * this.itemSize[1], (viewport.first.rows - 1) * this.itemSize[0]);
} else if (viewport.first.cols - first.cols > index[1]) {
scrollTo((viewport.first.cols - 1) * this.itemSize[1], viewport.first.rows * this.itemSize[0]);
}
} else {
if (viewport.first - first > index) {
var pos = (viewport.first - 1) * this.itemSize;
horizontal ? scrollTo(pos, 0) : scrollTo(0, pos);
}
}
} else if (isToEnd) {
if (both) {
if (viewport.last.rows - first.rows <= index[0] + 1) {
scrollTo(viewport.first.cols * this.itemSize[1], (viewport.first.rows + 1) * this.itemSize[0]);
} else if (viewport.last.cols - first.cols <= index[1] + 1) {
scrollTo((viewport.first.cols + 1) * this.itemSize[1], viewport.first.rows * this.itemSize[0]);
}
} else {
if (viewport.last - first <= index + 1) {
var _pos2 = (viewport.first + 1) * this.itemSize;
horizontal ? scrollTo(_pos2, 0) : scrollTo(0, _pos2);
}
}
}
} else {
this.scrollToIndex(index, behavior);
}
},
getRenderedRange: function getRenderedRange() {
var calculateFirstInViewport = function calculateFirstInViewport(_pos, _size) {
return Math.floor(_pos / (_size || _pos));
};
var firstInViewport = this.first;
var lastInViewport = 0;
if (this.element) {
var both = this.isBoth();
var horizontal = this.isHorizontal();
var _this$element = this.element,
scrollTop = _this$element.scrollTop,
scrollLeft = _this$element.scrollLeft;
if (both) {
firstInViewport = {
rows: calculateFirstInViewport(scrollTop, this.itemSize[0]),
cols: calculateFirstInViewport(scrollLeft, this.itemSize[1])
};
lastInViewport = {
rows: firstInViewport.rows + this.numItemsInViewport.rows,
cols: firstInViewport.cols + this.numItemsInViewport.cols
};
} else {
var scrollPos = horizontal ? scrollLeft : scrollTop;
firstInViewport = calculateFirstInViewport(scrollPos, this.itemSize);
lastInViewport = firstInViewport + this.numItemsInViewport;
}
}
return {
first: this.first,
last: this.last,
viewport: {
first: firstInViewport,
last: lastInViewport
}
};
},
calculateNumItems: function calculateNumItems() {
var both = this.isBoth();
var horizontal = this.isHorizontal();
var itemSize = this.itemSize;
var contentPos = this.getContentPosition();
var contentWidth = this.element ? this.element.offsetWidth - contentPos.left : 0;
var contentHeight = this.element ? this.element.offsetHeight - contentPos.top : 0;
var calculateNumItemsInViewport = function calculateNumItemsInViewport(_contentSize, _itemSize) {
return Math.ceil(_contentSize / (_itemSize || _contentSize));
};
var calculateNumToleratedItems = function calculateNumToleratedItems(_numItems) {
return Math.ceil(_numItems / 2);
};
var numItemsInViewport = both ? {
rows: calculateNumItemsInViewport(contentHeight, itemSize[0]),
cols: calculateNumItemsInViewport(contentWidth, itemSize[1])
} : calculateNumItemsInViewport(horizontal ? contentWidth : contentHeight, itemSize);
var numToleratedItems = this.d_numToleratedItems || (both ? [calculateNumToleratedItems(numItemsInViewport.rows), calculateNumToleratedItems(numItemsInViewport.cols)] : calculateNumToleratedItems(numItemsInViewport));
return {
numItemsInViewport: numItemsInViewport,
numToleratedItems: numToleratedItems
};
},
calculateOptions: function calculateOptions() {
var _this3 = this;
var both = this.isBoth();
var first = this.first;
var _this$calculateNumIte2 = this.calculateNumItems(),
numItemsInViewport = _this$calculateNumIte2.numItemsInViewport,
numToleratedItems = _this$calculateNumIte2.numToleratedItems;
var calculateLast = function calculateLast(_first, _num, _numT) {
var _isCols = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : false;
return _this3.getLast(_first + _num + (_first < _numT ? 2 : 3) * _numT, _isCols);
};
var last = both ? {
rows: calculateLast(first.rows, numItemsInViewport.rows, numToleratedItems[0]),
cols: calculateLast(first.cols, numItemsInViewport.cols, numToleratedItems[1], true)
} : calculateLast(first, numItemsInViewport, numToleratedItems);
this.last = last;
this.numItemsInViewport = numItemsInViewport;
this.d_numToleratedItems = numToleratedItems;
this.$emit('update:numToleratedItems', this.d_numToleratedItems);
if (this.showLoader) {
this.loaderArr = both ? Array.from({
length: numItemsInViewport.rows
}).map(function () {
return Array.from({
length: numItemsInViewport.cols
});
}) : Array.from({
length: numItemsInViewport
});
}
if (this.lazy) {
Promise.resolve().then(function () {
_this3.lazyLoadState = {
first: _this3.step ? both ? {
rows: 0,
cols: first.cols
} : 0 : first,
last: Math.min(_this3.step ? _this3.step : last, _this3.items.length)
};
_this3.$emit('lazy-load', _this3.lazyLoadState);
});
}
},
calculateAutoSize: function calculateAutoSize() {
var _this4 = this;
if (this.autoSize && !this.d_loading) {
Promise.resolve().then(function () {
if (_this4.content) {
var both = _this4.isBoth();
var horizontal = _this4.isHorizontal();
var vertical = _this4.isVertical();
_this4.content.style.minHeight = _this4.content.style.minWidth = 'auto';
_this4.content.style.position = 'relative';
_this4.element.style.contain = 'none';
var _ref = [DomHandler.getWidth(_this4.content), DomHandler.getHeight(_this4.content)],
contentWidth = _ref[0],
contentHeight = _ref[1];
contentWidth !== _this4.defaultContentWidth && (_this4.element.style.width = '');
contentHeight !== _this4.defaultContentHeight && (_this4.element.style.height = '');
var _ref2 = [DomHandler.getWidth(_this4.element), DomHandler.getHeight(_this4.element)],
width = _ref2[0],
height = _ref2[1];
(both || horizontal) && (_this4.element.style.width = width < _this4.defaultWidth ? width + 'px' : _this4.scrollWidth || _this4.defaultWidth + 'px');
(both || vertical) && (_this4.element.style.height = height < _this4.defaultHeight ? height + 'px' : _this4.scrollHeight || _this4.defaultHeight + 'px');
_this4.content.style.minHeight = _this4.content.style.minWidth = '';
_this4.content.style.position = '';
_this4.element.style.contain = '';
}
});
}
},
getLast: function getLast() {
var last = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 0;
var isCols = arguments.length > 1 ? arguments[1] : undefined;
return this.items ? Math.min(isCols ? (this.columns || this.items[0]).length : this.items.length, last) : 0;
},
getContentPosition: function getContentPosition() {
if (this.content) {
var style = getComputedStyle(this.content);
var left = parseFloat(style.paddingLeft) + Math.max(parseFloat(style.left) || 0, 0);
var right = parseFloat(style.paddingRight) + Math.max(parseFloat(style.right) || 0, 0);
var top = parseFloat(style.paddingTop) + Math.max(parseFloat(style.top) || 0, 0);
var bottom = parseFloat(style.paddingBottom) + Math.max(parseFloat(style.bottom) || 0, 0);
return {
left: left,
right: right,
top: top,
bottom: bottom,
x: left + right,
y: top + bottom
};
}
return {
left: 0,
right: 0,
top: 0,
bottom: 0,
x: 0,
y: 0
};
},
setSize: function setSize() {
var _this5 = this;
if (this.element) {
var both = this.isBoth();
var horizontal = this.isHorizontal();
var parentElement = this.element.parentElement;
var width = this.scrollWidth || "".concat(this.element.offsetWidth || parentElement.offsetWidth, "px");
var height = this.scrollHeight || "".concat(this.element.offsetHeight || parentElement.offsetHeight, "px");
var setProp = function setProp(_name, _value) {
return _this5.element.style[_name] = _value;
};
if (both || horizontal) {
setProp('height', height);
setProp('width', width);
} else {
setProp('height', height);
}
}
},
setSpacerSize: function setSpacerSize() {
var _this6 = this;
var items = this.items;
if (items) {
var both = this.isBoth();
var horizontal = this.isHorizontal();
var contentPos = this.getContentPosition();
var setProp = function setProp(_name, _value, _size) {
var _cpos = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 0;
return _this6.spacerStyle = _objectSpread(_objectSpread({}, _this6.spacerStyle), _defineProperty({}, "".concat(_name), (_value || []).length * _size + _cpos + 'px'));
};
if (both) {
setProp('height', items, this.itemSize[0], contentPos.y);
setProp('width', this.columns || items[1], this.itemSize[1], contentPos.x);
} else {
horizontal ? setProp('width', this.columns || items, this.itemSize, contentPos.x) : setProp('height', items, this.itemSize, contentPos.y);
}
}
},
setContentPosition: function setContentPosition(pos) {
var _this7 = this;
if (this.content && !this.appendOnly) {
var both = this.isBoth();
var horizontal = this.isHorizontal();
var first = pos ? pos.first : this.first;
var calculateTranslateVal = function calculateTranslateVal(_first, _size) {
return _first * _size;
};
var setTransform = function setTransform() {
var _x = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 0;
var _y = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;
return _this7.contentStyle = _objectSpread(_objectSpread({}, _this7.contentStyle), {
transform: "translate3d(".concat(_x, "px, ").concat(_y, "px, 0)")
});
};
if (both) {
setTransform(calculateTranslateVal(first.cols, this.itemSize[1]), calculateTranslateVal(first.rows, this.itemSize[0]));
} else {
var translateVal = calculateTranslateVal(first, this.itemSize);
horizontal ? setTransform(translateVal, 0) : setTransform(0, translateVal);
}
}
},
onScrollPositionChange: function onScrollPositionChange(event) {
var _this8 = this;
var target = event.target;
var both = this.isBoth();
var horizontal = this.isHorizontal();
var contentPos = this.getContentPosition();
var calculateScrollPos = function calculateScrollPos(_pos, _cpos) {
return _pos ? _pos > _cpos ? _pos - _cpos : _pos : 0;
};
var calculateCurrentIndex = function calculateCurrentIndex(_pos, _size) {
return Math.floor(_pos / (_size || _pos));
};
var calculateTriggerIndex = function calculateTriggerIndex(_currentIndex, _first, _last, _num, _numT, _isScrollDownOrRight) {
return _currentIndex <= _numT ? _numT : _isScrollDownOrRight ? _last - _num - _numT : _first + _numT - 1;
};
var calculateFirst = function calculateFirst(_currentIndex, _triggerIndex, _first, _last, _num, _numT, _isScrollDownOrRight) {
if (_currentIndex <= _numT) return 0;else return Math.max(0, _isScrollDownOrRight ? _currentIndex < _triggerIndex ? _first : _currentIndex - _numT : _currentIndex > _triggerIndex ? _first : _currentIndex - 2 * _numT);
};
var calculateLast = function calculateLast(_currentIndex, _first, _last, _num, _numT, _isCols) {
var lastValue = _first + _num + 2 * _numT;
if (_currentIndex >= _numT) {
lastValue += _numT + 1;
}
return _this8.getLast(lastValue, _isCols);
};
var scrollTop = calculateScrollPos(target.scrollTop, contentPos.top);
var scrollLeft = calculateScrollPos(target.scrollLeft, contentPos.left);
var newFirst = both ? {
rows: 0,
cols: 0
} : 0;
var newLast = this.last;
var isRangeChanged = false;
var newScrollPos = this.lastScrollPos;
if (both) {
var isScrollDown = this.lastScrollPos.top <= scrollTop;
var isScrollRight = this.lastScrollPos.left <= scrollLeft;
if (!this.appendOnly || this.appendOnly && (isScrollDown || isScrollRight)) {
var currentIndex = {
rows: calculateCurrentIndex(scrollTop, this.itemSize[0]),
cols: calculateCurrentIndex(scrollLeft, this.itemSize[1])
};
var triggerIndex = {
rows: calculateTriggerIndex(currentIndex.rows, this.first.rows, this.last.rows, this.numItemsInViewport.rows, this.d_numToleratedItems[0], isScrollDown),
cols: calculateTriggerIndex(currentIndex.cols, this.first.cols, this.last.cols, this.numItemsInViewport.cols, this.d_numToleratedItems[1], isScrollRight)
};
newFirst = {
rows: calculateFirst(currentIndex.rows, triggerIndex.rows, this.first.rows, this.last.rows, this.numItemsInViewport.rows, this.d_numToleratedItems[0], isScrollDown),
cols: calculateFirst(currentIndex.cols, triggerIndex.cols, this.first.cols, this.last.cols, this.numItemsInViewport.cols, this.d_numToleratedItems[1], isScrollRight)
};
newLast = {
rows: calculateLast(currentIndex.rows, newFirst.rows, this.last.rows, this.numItemsInViewport.rows, this.d_numToleratedItems[0]),
cols: calculateLast(currentIndex.cols, newFirst.cols, this.last.cols, this.numItemsInViewport.cols, this.d_numToleratedItems[1], true)
};
isRangeChanged = newFirst.rows !== this.first.rows || newLast.rows !== this.last.rows || newFirst.cols !== this.first.cols || newLast.cols !== this.last.cols || this.isRangeChanged;
newScrollPos = {
top: scrollTop,
left: scrollLeft
};
}
} else {
var scrollPos = horizontal ? scrollLeft : scrollTop;
var isScrollDownOrRight = this.lastScrollPos <= scrollPos;
if (!this.appendOnly || this.appendOnly && isScrollDownOrRight) {
var _currentIndex2 = calculateCurrentIndex(scrollPos, this.itemSize);
var _triggerIndex2 = calculateTriggerIndex(_currentIndex2, this.first, this.last, this.numItemsInViewport, this.d_numToleratedItems, isScrollDownOrRight);
newFirst = calculateFirst(_currentIndex2, _triggerIndex2, this.first, this.last, this.numItemsInViewport, this.d_numToleratedItems, isScrollDownOrRight);
newLast = calculateLast(_currentIndex2, newFirst, this.last, this.numItemsInViewport, this.d_numToleratedItems);
isRangeChanged = newFirst !== this.first || newLast !== this.last || this.isRangeChanged;
newScrollPos = scrollPos;
}
}
return {
first: newFirst,
last: newLast,
isRangeChanged: isRangeChanged,
scrollPos: newScrollPos
};
},
onScrollChange: function onScrollChange(event) {
var _this$onScrollPositio = this.onScrollPositionChange(event),
first = _this$onScrollPositio.first,
last = _this$onScrollPositio.last,
isRangeChanged = _this$onScrollPositio.isRangeChanged,
scrollPos = _this$onScrollPositio.scrollPos;
if (isRangeChanged) {
var newState = {
first: first,
last: last
};
this.setContentPosition(newState);
this.first = first;
this.last = last;
this.lastScrollPos = scrollPos;
this.$emit('scroll-index-change', newState);
if (this.lazy && this.isPageChanged(first)) {
var lazyLoadState = {
first: this.step ? Math.min(this.getPageByFirst(first) * this.step, this.items.length - this.step) : first,
last: Math.min(this.step ? (this.getPageByFirst(first) + 1) * this.step : last, this.items.length)
};
var isLazyStateChanged = this.lazyLoadState.first !== lazyLoadState.first || this.lazyLoadState.last !== lazyLoadState.last;
isLazyStateChanged && this.$emit('lazy-load', lazyLoadState);
this.lazyLoadState = lazyLoadState;
}
}
},
onScroll: function onScroll(event) {
var _this9 = this;
this.$emit('scroll', event);
if (this.delay) {
if (this.scrollTimeout) {
clearTimeout(this.scrollTimeout);
}
if (this.isPageChanged()) {
if (!this.d_loading && this.showLoader) {
var _this$onScrollPositio2 = this.onScrollPositionChange(event),
isRangeChanged = _this$onScrollPositio2.isRangeChanged;
var changed = isRangeChanged || (this.step ? this.isPageChanged() : false);
changed && (this.d_loading = true);
}
this.scrollTimeout = setTimeout(function () {
_this9.onScrollChange(event);
if (_this9.d_loading && _this9.showLoader && (!_this9.lazy || _this9.loading === undefined)) {
_this9.d_loading = false;
_this9.page = _this9.getPageByFirst();
}
}, this.delay);
}
} else {
this.onScrollChange(event);
}
},
onResize: function onResize() {
var _this10 = this;
if (this.resizeTimeout) {
clearTimeout(this.resizeTimeout);
}
this.resizeTimeout = setTimeout(function () {
if (DomHandler.isVisible(_this10.element)) {
var both = _this10.isBoth();
var vertical = _this10.isVertical();
var horizontal = _this10.isHorizontal();
var _ref3 = [DomHandler.getWidth(_this10.element), DomHandler.getHeight(_this10.element)],
width = _ref3[0],
height = _ref3[1];
var isDiffWidth = width !== _this10.defaultWidth,
isDiffHeight = height !== _this10.defaultHeight;
var reinit = both ? isDiffWidth || isDiffHeight : horizontal ? isDiffWidth : vertical ? isDiffHeight : false;
if (reinit) {
_this10.d_numToleratedItems = _this10.numToleratedItems;
_this10.defaultWidth = width;
_this10.defaultHeight = height;
_this10.defaultContentWidth = DomHandler.getWidth(_this10.content);
_this10.defaultContentHeight = DomHandler.getHeight(_this10.content);
_this10.init();
}
}
}, this.resizeDelay);
},
bindResizeListener: function bindResizeListener() {
if (!this.resizeListener) {
this.resizeListener = this.onResize.bind(this);
window.addEventListener('resize', this.resizeListener);
window.addEventListener('orientationchange', this.resizeListener);
}
},
unbindResizeListener: function unbindResizeListener() {
if (this.resizeListener) {
window.removeEventListener('resize', this.resizeListener);
window.removeEventListener('orientationchange', this.resizeListener);
this.resizeListener = null;
}
},
getOptions: function getOptions(renderedIndex) {
var count = (this.items || []).length;
var index = this.isBoth() ? this.first.rows + renderedIndex : this.first + renderedIndex;
return {
index: index,
count: count,
first: index === 0,
last: index === count - 1,
even: index % 2 === 0,
odd: index % 2 !== 0
};
},
getLoaderOptions: function getLoaderOptions(index, extOptions) {
var count = this.loaderArr.length;
return _objectSpread({
index: index,
count: count,
first: index === 0,
last: index === count - 1,
even: index % 2 === 0,
odd: index % 2 !== 0
}, extOptions);
},
getPageByFirst: function getPageByFirst(first) {
return Math.floor(((first !== null && first !== void 0 ? first : this.first) + this.d_numToleratedItems * 4) / (this.step || 1));
},
isPageChanged: function isPageChanged(first) {
return this.step ? this.page !== this.getPageByFirst(first !== null && first !== void 0 ? first : this.first) : true;
},
setContentEl: function setContentEl(el) {
this.content = el || this.content || DomHandler.findSingle(this.element, '[data-pc-section="content"]');
},
elementRef: function elementRef(el) {
this.element = el;
},
contentRef: function contentRef(el) {
this.content = el;
}
},
computed: {
containerClass: function containerClass() {
return ['p-virtualscroller', this["class"], {
'p-virtualscroller-inline': this.inline,
'p-virtualscroller-both p-both-scroll': this.isBoth(),
'p-virtualscroller-horizontal p-horizontal-scroll': this.isHorizontal()
}];
},
contentClass: function contentClass() {
return ['p-virtualscroller-content', {
'p-virtualscroller-loading': this.d_loading
}];
},
loaderClass: function loaderClass() {
return ['p-virtualscroller-loader', {
'p-component-overlay': !this.$slots.loader
}];
},
loadedItems: function loadedItems() {
var _this11 = this;
if (this.items && !this.d_loading) {
if (this.isBoth()) return this.items.slice(this.appendOnly ? 0 : this.first.rows, this.last.rows).map(function (item) {
return _this11.columns ? item : item.slice(_this11.appendOnly ? 0 : _this11.first.cols, _this11.last.cols);
});else if (this.isHorizontal() && this.columns) return this.items;else return this.items.slice(this.appendOnly ? 0 : this.first, this.last);
}
return [];
},
loadedRows: function loadedRows() {
return this.d_loading ? this.loaderDisabled ? this.loaderArr : [] : this.loadedItems;
},
loadedColumns: function loadedColumns() {
if (this.columns) {
var both = this.isBoth();
var horizontal = this.isHorizontal();
if (both || horizontal) {
return this.d_loading && this.loaderDisabled ? both ? this.loaderArr[0] : this.loaderArr : this.columns.slice(both ? this.first.cols : this.first, both ? this.last.cols : this.last);
}
}
return this.columns;
}
},
components: {
SpinnerIcon: SpinnerIcon
}
};
var _hoisted_1 = ["tabindex"];
function render(_ctx, _cache, $props, $setup, $data, $options) {
var _component_SpinnerIcon = resolveComponent("SpinnerIcon");
return !_ctx.disabled ? (openBlock(), createElementBlock("div", mergeProps({
key: 0,
ref: $options.elementRef,
"class": $options.containerClass,
tabindex: _ctx.tabindex,
style: _ctx.style,
onScroll: _cache[0] || (_cache[0] = function () {
return $options.onScroll && $options.onScroll.apply($options, arguments);
})
}, _ctx.ptm('root'), {
"data-pc-name": "virtualscroller"
}), [renderSlot(_ctx.$slots, "content", {
styleClass: $options.contentClass,
items: $options.loadedItems,
getItemOptions: $options.getOptions,
loading: $data.d_loading,
getLoaderOptions: $options.getLoaderOptions,
itemSize: _ctx.itemSize,
rows: $options.loadedRows,
columns: $options.loadedColumns,
contentRef: $options.contentRef,
spacerStyle: $data.spacerStyle,
contentStyle: $data.contentStyle,
vertical: $options.isVertical(),
horizontal: $options.isHorizontal(),
both: $options.isBoth()
}, function () {
return [createElementVNode("div", mergeProps({
ref: $options.contentRef,
"class": $options.contentClass,
style: $data.contentStyle
}, _ctx.ptm('content')), [(openBlock(true), createElementBlock(Fragment, null, renderList($options.loadedItems, function (item, index) {
return renderSlot(_ctx.$slots, "item", {
key: index,
item: item,
options: $options.getOptions(index)
});
}), 128))], 16)];
}), _ctx.showSpacer ? (openBlock(), createElementBlock("div", mergeProps({
key: 0,
"class": "p-virtualscroller-spacer",
style: $data.spacerStyle
}, _ctx.ptm('spacer')), null, 16)) : createCommentVNode("", true), !_ctx.loaderDisabled && _ctx.showLoader && $data.d_loading ? (openBlock(), createElementBlock("div", mergeProps({
key: 1,
"class": $options.loaderClass
}, _ctx.ptm('loader')), [_ctx.$slots && _ctx.$slots.loader ? (openBlock(true), createElementBlock(Fragment, {
key: 0
}, renderList($data.loaderArr, function (_, index) {
return renderSlot(_ctx.$slots, "loader", {
key: index,
options: $options.getLoaderOptions(index, $options.isBoth() && {
numCols: _ctx.d_numItemsInViewport.cols
})
});
}), 128)) : createCommentVNode("", true), renderSlot(_ctx.$slots, "loadingicon", {}, function () {
return [createVNode(_component_SpinnerIcon, mergeProps({
spin: "",
"class": "p-virtualscroller-loading-icon"
}, _ctx.ptm('loadingIcon')), null, 16)];
})], 16)) : createCommentVNode("", true)], 16, _hoisted_1)) : (openBlock(), createElementBlock(Fragment, {
key: 1
}, [renderSlot(_ctx.$slots, "default"), renderSlot(_ctx.$slots, "content", {
items: _ctx.items,
rows: _ctx.items,
columns: $options.loadedColumns
})], 64));
}
script.render = render;
export { script as default };