mnstr/dist/mnstr.umd.js

Ultra fast large list rendering.

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0:if(this.needUpdate(),this._scrollNode||(this.renderScrollNode(n||this.parentNode),this.renderListNode(),this.initScrollListener()),-1===this._currentMaxIndex)return e.abrupt("return");e.next=4;break;case 4:return e.next=6,this.addCell(t.index,t.position);case 6:e.sent&&(this.setNodeHeight(this._listNode,!1,t.height,!0),this.setScrollPosition(t.scrollTop)),delete this._initialScrollToElement,delete this._cachedScrollToElement,this.updateCellsAverages(),this.updateCells();case 12:case"end":return e.stop()}},e,this)})),function(e,t){return kt.apply(this,arguments)})},{key:"getElementAndLevelAtIndex",value:function(e){if(!this.canHasChildren())return this.createElementAndLevelInformation(this._data[e],0);for(var t=0,n=this._expandInformations.length-1;0<=n;n--){var r,i=this._expandInformations[n];if(i.active&&!(i.index>=e))if(t+=i.elementChildren.length,!(i.index+t<e))return r=e-(i.index+t-i.elementChildren.length)-1,this.createElementAndLevelInformation(i.elementChildren[r],i.level)}return this.createElementAndLevelInformation(this._data[e-t],0)}},{key:"createElementAndLevelInformation",value:function(e,t){return{element:e,level:t}}},{key:"updateCurrentMaxIndex",value:function(){var e=this._expandInformations.reduce(function(e,t){return e+(t.active?t.elementChildren.length:0)},0);this._currentMaxIndex=this._data.length-1+e}},{key:"canHasChildren",value:function(){return void 0!==this.getElementChildren}},{key:"getChildrenForElement",value:function(e){return this.canHasChildren()?this.getElementChildren.call(this.context,e,this):void 0}},{key:"getIndexForElement",value:function(n){var i=this,r=this._data.indexOf(n);return-1<r?this._expandInformations.reduce(function(e,t){return t.elementParent||i._data.indexOf(t.element)<r&&(e+=t.totalLength),e},r):this._expandInformations.reduce(function(e,t){var r;return-1<e||-1<(r=t.elementChildren.indexOf(n))&&(e=r+t.index+1+t.elementChildren.reduce(function(e,t,n){return r<=n||(n=i._expandInformations.find(function(e){return e.element===t}))&&(e+=n.totalLength),e},0)),e},-1)}},{key:"maintainCellCount",value:(wt=R(g.mark(function e(){var t,n,r,i,o,s,l,a,u;return g.wrap(function(e){for(;;)switch(e.prev=e.next){case 0:n=this.getScrollPosition(),t=n+this.getTopRenderThreshold(),n=n+this.getBottomRenderThreshold(),i=this.getCellsSorted(),r=i[0],i=i[i.length-1],o=this.getNodeBottom(i)-this.getNodeTop(r),s=this.getMinimumListNodeHeight(),u=o<s,l=!1,e.t0=!0,e.next=e.t0===(!r&&-1<this._currentMaxIndex)?13:e.t0===(i&&i.__index<this._currentMaxIndex&&(u||this.getNodeBottom(i)<n))?19:e.t0===(r&&0<r.__index&&(u||this.getNodeTop(r)>t))?23:e.t0===(r&&(r.__index<0||this.getNodeBottom(r)<t&&o-this.getNodeHeight(r)>s))?27:e.t0===(i&&(i.__index>this._currentMaxIndex||this.getNodeTop(i)>n&&o-this.getNodeHeight(i)>s))?31:35;break;case 13:return a=this._initialScrollToElement?this.getIndexForElement(this._initialScrollToElement):0,e.next=16,this.addCell(a,0);case 16:return(u=e.sent)&&(this.setNodeTop(u,this.getNodeHeight(u)*a),l=!0),e.abrupt("break",35);case 19:return e.next=21,this.addCell(i.__index+1,this.getNodeBottom(i));case 21:return l=!!e.sent,e.abrupt("break",35);case 23:return e.next=25,this.addCell(r.__index-1,this.getNodeTop(r),!0);case 25:return l=!!e.sent,e.abrupt("break",35);case 27:return e.next=29,this.removeCell(r);case 29:return l=!!e.sent,e.abrupt("break",35);case 31:return e.next=33,this.removeCell(i);case 33:return l=!!e.sent,e.abrupt("break",35);case 35:if(l){if(this.updateCellsSorted(),this.updateCellsAverages(),this.updateListBounds(),this._initialScrollToElement)return e.next=42,this.scrollToCachedScrollElement();e.next=42}else e.next=46;break;case 42:return e.next=44,this.updateCells();case 44:return e.next=46,this.maintainCellCount();case 46:case"end":return e.stop()}},e,this)})),function(){return wt.apply(this,arguments)})},{key:"addCell",value:(Ct=R(g.mark(function e(t,n){var r,i=2<arguments.length&&void 0!==arguments[2]&&arguments[2];return g.wrap(function(e){for(;;)switch(e.prev=e.next){case 0:if(t<0||t>this._currentMaxIndex)return e.abrupt("return");e.next=2;break;case 2:if(this.virtualEnvironment)return e.next=5,this.updateCell(void 0,t);e.next=8;break;case 5:e.t0=e.sent,e.next=11;break;case 8:return e.next=10,this.updateCell(this.renderCell(),t);case 10:e.t0=e.sent;case 11:if(r=e.t0){e.next=14;break}return e.abrupt("return");case 14:return r.__frameNode=this.virtualEnvironment&&this.observeCellBounds?this.renderIFrame(r,this.onResizeCell):r.__frameNode,this.setNodeHeight(r),this.setNodeTop(r,n-(i?this.getNodeHeight(r):0)),e.abrupt("return",r);case 18:case"end":return e.stop()}},e,this)})),function(e,t){return Ct.apply(this,arguments)})},{key:"removeCell",value:(bt=R(g.mark(function e(t){var n;return g.wrap(function(e){for(;;)switch(e.prev=e.next){case 0:if(this.virtualEnvironment)return n=this.removeVirtualElementForCell(t),e.next=4,this.syncVDOMToInternalState();e.next=5;break;case 4:return e.abrupt("return",n);case 5:return this._listNode.removeChild(t),e.abrupt("return",!0);case 7:case"end":return e.stop()}},e,this)})),function(e){return bt.apply(this,arguments)})},{key:"rUpdateCells",value:function(e,t,n){this.rAF(this.updateCells,"updatecells",e,t,n)}},{key:"updateCells",value:(Nt=R(g.mark(function e(t,n,r){var i,o,s,l,a,u,c,h,d,f,p,v,m,_;return g.wrap(function(e){for(;;)switch(e.prev=e.next){case 0:if(this._updatingCells)return e.abrupt("return");e.next=2;break;case 2:this._updatingCells=!0,i=this.getScrollPosition(),o=i+this.getTopRenderThreshold(),s=i+this.getBottomRenderThreshold(),l=this.getCellsSorted().slice(0),c=!(u={}),(a=t)&&(u.index=0,u.pos=0,r?(h=this.findCellIndexDeviation(),m=h*this._averageCellHeight,u.index=Math.max(0,l&&l.length?l[0].__index+h:0),u.pos=Math.max(0,this.getNodeTop(l[0])+m),this.updateListBounds(!0),this.setScrollPosition(i+m)):this.setScrollPosition(0)),l&&l.length&&(this.getNodeTop(l[0])>s||this.getNodeBottom(l[l.length-1])<o)&&(t=!0,u.index=Math.min(Math.round(Math.max(o,0)/this._averageCellHeight),this._currentMaxIndex-l.length+1),u.pos=Math.max(0,u.index*this._averageCellHeight+this.getTopRenderThreshold())),h=0;case 13:if(h<l.length){if(d=l[0],f=l[l.length-1],p=l[h],t)return v=0===p.__index&&0<u.index?this.getNodeHeight(p):0,e.next=21,this.updateCell(p,u.index,n);e.next=29}else e.next=66;break;case 21:this.setNodeHeight(p),u.pos+=v?v-this.getNodeHeight(p):0,this.setNodeTop(p,u.pos),u.index+=1,u.pos+=this.getNodeHeight(p),c=!0,e.next=63;break;case 29:if(f.__index<this._currentMaxIndex&&this.getNodeBottom(p)<o&&this.getNodeBottom(f)<s)return e.next=32,this.updateCell(p,f.__index+1,n);e.next=38;break;case 32:this.setNodeHeight(p),this.setNodeTop(p,this.getNodeBottom(f)),l.push(l.shift()),c=!0,e.next=63;break;case 38:if(h===l.length-1&&0<d.__index&&this.getNodeTop(p)>s&&this.getNodeTop(d)>o)return e.next=41,this.updateCell(p,d.__index-1,n);e.next=63;break;case 41:this.setNodeHeight(p),this.setNodeTop(p,this.getNodeTop(d)-this.getNodeHeight(p)),l.unshift(l.pop()),c=!0,e.t0=!0,e.next=e.t0===(0===p.__index&&0<this.getNodeTop(p))?48:e.t0===(0===this.getNodeTop(p))?55:62;break;case 48:return m=this.getNodeTop(p),t=!0,u.index=p.__index,u.pos=0,this.setScrollPosition(i-m),h=-1,e.abrupt("break",63);case 55:return _=this._averageCellHeight*p.__index,t=!0,u.index=p.__index,u.pos=_,this.setScrollPosition(i+_),h=-1,e.abrupt("break",63);case 62:h--;case 63:h++,e.next=13;break;case 66:if(l&&l.length&&!c){e.next=72;break}return this.updateCellsSorted(),e.next=70,this.maintainCellCount();case 70:this.updateCellsAverages(),this.emitEvent("cellsUpdated",this.getCellsSorted(),this);case 72:this.updateListBounds(a),this.scrollToCachedScrollElement(),this.updateFirstAndLastCellInViewport(),this._updatingCells=!1;case 76:case"end":return e.stop()}},e,this)})),function(e,t,n){return Nt.apply(this,arguments)})},{key:"updateCell",value:(Et=R(g.mark(function e(t,n,r){var i,o,s,l,a;return g.wrap(function(e){for(;;)switch(e.prev=e.next){case 0:if(i=this.getElementAndLevelAtIndex(n)){e.next=3;break}return e.abrupt("return");case 3:if(o=i.element,s=i.level,!o||t&&o===t.__element&&!r)return t&&o===t.__element&&(t.__index=n,t.__level=s,t.dataset.level=s),e.abrupt("return");e.next=8;break;case 8:l=this.canHasChildren()?this.getExpandInformationForElement(o):void 0,t&&this.disableNodeResizeObserving(t),this.virtualEnvironment?e.next=15:("string"==typeof(a=this.getCellRenderer?this.getCellRenderer.call(this.context,o,n,void 0!==l,this):"")||a instanceof String?t.__contentNode.innerHTML=a:(t.__contentNode.innerHTML="",t.__contentNode.appendChild(a)),e.next=19);break;case 15:return t?this.replaceVirtualElementForCell(o,t,n,void 0!==l,s):this.addVirtualElement(o,n,void 0!==l,s),e.next=18,this.updateVirtualDOM();case 18:t||(a=this.getCells(),t=a[a.length-1]);case 19:return this.observeCellBounds&&this.rAF(this.enableNodeResizeObserving,!1,t),l?t.classList.add("expanded"):t.classList.remove("expanded"),t.dataset.level=s,t.__element=o,t.__index=n,t.__level=s,this.emitElementEvents(o,n),e.abrupt("return",t);case 27:case"end":return e.stop()}},e,this)})),function(e,t,n){return Et.apply(this,arguments)})},{key:"findCellIndexDeviation",value:function(){for(var e=0;e<this._cellsSorted.length;e++){var t=this._cellsSorted[e],n=this.getIndexForElement(t.__element);if(-1!==n)return n===t.__index?0:n-t.__index}return 0}},{key:"updateCellsAverages",value:function(){var e=this.getCells(),t=0;this._lowestCellHeight=Number.MAX_VALUE;for(var n=0;n<e.length;n++){var r=this.getNodeHeight(e[n]);t+=r,this._lowestCellHeight=0===this._lowestCellHeight?r:Math.min(this._lowestCellHeight,r)}this._averageCellHeight=t/e.length}},{key:"cellBoundsUpdated",value:function(){this.rUpdateCells(!0,!1,!0)}},{key:"updateFirstAndLastCellInViewport",value:function(){for(var e,t=this.getScrollPosition(),n=this.getNodeHeight(this._scrollNode),r=this.getCellsSorted(),i=t+n,o=Math.max(1,Math.round(r.length/5)),s=-1,l=-1,a=0;a<r.length;a+=o){var u=r[a];if(this.getNodeTop(u)>t){s=Math.max(0,a-o);break}}if(-1<s){for(;;){var c=r[s];if(this.getNodeTop(c)>=t)break;s++}for(l=s;;){var h=r[l];if(!h||this.getNodeTop(h)+this.getNodeHeight(h)>=i){l--;break}l++}s<0||l<0||(n=r[s].__element,e=r[l].__element,n!==this._firstInBoundsElement&&(this._firstInBoundsElement=n,this.emitEvent("firstInBoundsElementChanged",this._firstInBoundsElement,this)),e!==this._lastInBoundsElement&&(this._lastInBoundsElement=e,this.emitEvent("lastInBoundsElementChanged",this._lastInBoundsElement,this)))}}},{key:"onResizeScrollNode",value:function(e){var t=this;this.disableAllCellsResizeObserving(),this.rAF(R(g.mark(function e(){return g.wrap(function(e){for(;;)switch(e.prev=e.next){case 0:return e.next=2,t.updateCells(!0,!1,!0);case 2:t.setNodeHeight(t._scrollNode),t.enableAllCellsResizeObserving();case 4:case"end":return e.stop()}},e,t)})),"resizelist")}},{key:"onResizeCell",value:function(e){this.cellBoundsUpdated()}},{key:"disableNodeResizeObserving",value:function(e){e.__frameNode&&e.__frameNode.contentWindow&&e.__frameNode.contentWindow.onresize&&(e.__frameNode.contentWindow.__onresize=e.__frameNode.contentWindow.onresize,e.__frameNode.contentWindow.onresize=void 0)}},{key:"enableNodeResizeObserving",value:function(e){this.observeCellBounds&&e.__frameNode&&e.__frameNode.contentWindow&&e.__frameNode.contentWindow.__onresize&&(e.__frameNode.contentWindow.onresize=e.__frameNode.contentWindow.__onresize,e.__frameNode.contentWindow.__onresize=void 0)}},{key:"disableAllCellsResizeObserving",value:function(){var t=this;this.observeCellBounds&&this.getCellsSorted().forEach(function(e){return t.disableNodeResizeObserving(e)})}},{key:"enableAllCellsResizeObserving",value:function(){var t=this;this.observeCellBounds&&this.getCellsSorted().forEach(function(e){return t.enableNodeResizeObserving(e)})}},{key:"isElementExpanded",value:function(e){return void 0!==this.getExpandInformationForElement(e)}},{key:"expandElement",value:function(e){this.addExpandInformationForElement(e),this.updateCells(!0,!1,!0)}},{key:"collapseElement",value:function(e){this.removeExpandInformationForElement(e),this.updateCells(!0,!1,!0)}},{key:"toggleExpandElement",value:function(e){this.isElementExpanded(e)?this.collapseElement(e):this.expandElement(e)}},{key:"getExpandInformationForElement",value:function(t){return this._expandInformations.find(function(e){return e.element===t})}},{key:"getExpandInformationForElementParent",value:function(t){return this._expandInformations.find(function(e){return-1<e.elementChildren.indexOf(t)})}},{key:"createExpandInformation",value:function(e){var t=this.getExpandInformationForElementParent(e);return{active:!0,element:e,elementIndex:(t?t.elementChildren:this._data).indexOf(e),elementChildren:this.getChildrenForElement(e),elementParent:t?t.element:void 0,index:this.getIndexForElement(e),level:t?t.level+1:1,totalLength:0}}},{key:"addExpandInformationForElement",value:function(e){e=this.createExpandInformation(e);if(this._expandInformations.push(e),this.invalidateExpandInformations(),this.rememberChildrenExpands)for(var t=this._expandInformations.indexOf(e)+1;t<this._expandInformations.length;t++){var n=this._expandInformations[t],r=this._expandInformations[t-1];r.active&&r.element===n.elementParent&&(n.active=!0)}this.invalidateExpandInformations()}},{key:"removeExpandInformationForElement",value:function(e){for(var t=this.getExpandInformationForElement(e),n=[t],r=this._expandInformations.indexOf(t)+1;r<this._expandInformations.length;r++){var i=this._expandInformations[r];if(i.level<=t.level)break;n.push(i)}for(var o=0;o<n.length;o++){var s=n[o];s!==t&&this.rememberChildrenExpands?s.active=!1:this.removeElementFromArray(this._expandInformations,s)}this.invalidateExpandInformations()}},{key:"invalidateExpandInformations",value:function(){this._expandInformations.sort(function(e,t){return e.index-t.index});for(var e=[],t=0;t<this._expandInformations.length;t++){for(var n=this._expandInformations[t],r=n.elementParent?this.getChildrenForElement(n.elementParent):this._data,i=!1,o=0;o<e.length;o++)i=e[o].element===n.elementParent||i;i||-1===r.indexOf(n.element)?(n.elementChildren=[],e.push(n)):n.elementChildren=this.getChildrenForElement(n.element)}for(var s=0;s<e.length;s++)this.removeElementFromArray(this._expandInformations,e[s]);this.calculateExpandInformationIndexes()}},{key:"calculateExpandInformationIndexes",value:function(){for(var e=[],t=void 0,n=0,r=0;r<this._expandInformations.length;r++){var i=this._expandInformations[r];if(i.active){t&&(i.level>t.level&&e.push(t),i.level<t.level)&&(e=e.slice(0,e.length-(t.level-i.level))),i.totalLength=i.elementChildren.length;for(var o=0;o<e.length;o++)e[o].totalLength+=i.totalLength;var s=0<e.length?e[e.length-1]:void 0,l=s?s.index:void 0,a=s?s.totalLength-i.totalLength:0,s=s?s.elementChildren.length:0,u=(e&&0<e.length?e[e.length-1].elementChildren:this._data).indexOf(i.element),a=a-s+u+(void 0!==l?l+1:0)+(1===i.level?n:0);i.elementIndex=u,i.index=a,n+=(t=i).elementChildren.length}}this.updateCurrentMaxIndex()}},{key:"rAF",value:function(e,t){var n=this,r=[].slice.call(arguments,2);this.virtualEnvironment?e.apply(this,r):t?(this._frameRequests[t]&&window.cancelAnimationFr