@progress/kendo-vue-grid/VirtualScrollFixed.js

TODO

/**
 * @license
 *-------------------------------------------------------------------------------------------
 * Copyright © 2025 Progress Software Corporation. All rights reserved.
 * Licensed under commercial license. See LICENSE.md in the package root for more information
 *-------------------------------------------------------------------------------------------
 */
"use strict";Object.defineProperty(exports,Symbol.toStringTag,{value:"Module"});class f{constructor(t=0,i,h,e){this.total=t,this.offsets=[],this.heights=[];let s=0;for(let r=0;r<t;r++){this.offsets.push(s);const a=e&&e[r].expanded&&e[r].rowType==="data"?h:i;s+=a,this.heights.push(a)}}height(t){return this.heights[t]}index(t){if(t<0)return;const i=this.offsets.reduce((h,e,s)=>{if(h!==void 0)return h;if(e===t)return s;if(e>t)return s-1},void 0);return i===void 0?this.total-1:i}offset(t){return this.offsets[t]}totalHeight(){const t=this.offsets[this.offsets.length-1],i=this.heights[this.heights.length-1];return t+i}}class d{constructor(t){this.table=null,this.containerHeight=0,this.topCacheCount=0,this.attendedSkip=0,this.propsSkip=0,this.total=0,this.scrollableVirtual=!1,this.realSkip=0,this.pageSize=0,this.PageChange=null,this.fixedScroll=!1,this.askedSkip=void 0,this.tableTransform="",this.scrollSyncing=!1,this.lastLoaded=0,this.firstLoaded=0,this.lastScrollTop=0,this.firstLoaded=this.pageSize,this.lastLoaded=this.realSkip+this.pageSize,this.scrollHandler=this.scrollHandler.bind(this)}get container(){return this.containerRef}translate(t){this.scrollableVirtual&&this.table&&(this.table.style.transform="translateY("+t+"px)")}changePage(t,i){this.PageChange&&this.PageChange({skip:Math.max(0,t),take:this.pageSize},i)}reset(){this.scrollSyncing=!0,!this.fixedScroll&&(this.container&&(this.container.scrollTop=0),this.translate(0))}scrollHandler(t){if(!this.scrollableVirtual||!this.container||!this.table||!this.rowHeightService||!this.containerRef)return;if(this.scrollSyncing){this.scrollSyncing=!1;return}const i=this.container.scrollTop,h=this.lastScrollTop>=i,e=!h;this.lastScrollTop=i;let s=this.rowHeightService.index(i),r=this.rowHeightService.offset(s);const{offsetHeight:a}=this.containerRef,n=this.rowHeightService.index(i+a);if(e&&n>=this.lastLoaded&&this.lastLoaded<this.total){const o=s+this.pageSize-this.total;o>0&&(s=s-o,r=this.rowHeightService.offset(s)),this.firstLoaded=s,this.translate(r);const c=this.firstLoaded+this.pageSize;this.lastLoaded=Math.min(c,this.total),this.changePage(this.firstLoaded,t)}else if(h&&s<this.firstLoaded){const o=Math.floor(this.pageSize*.3);this.firstLoaded=Math.max(s-o,0),this.translate(this.rowHeightService.offset(this.firstLoaded)),this.lastLoaded=Math.min(this.firstLoaded+this.pageSize,this.total),this.changePage(this.firstLoaded,t)}}}exports.RowHeightService=f;exports.VirtualScrollFixed=d;