; }; //v=====--------------------< Brew Renderer Component >-------------------=====v// const renderedPages = []; let rawPages = []; const BrewRenderer = (props)=>{ props = { text : '', style : '', renderer : 'legacy', theme : '5ePHB', lang : '', errors : [], currentEditorPage : 0, themeBundle : {}, ...props }; const [state, setState] = useState({ height : PAGE_HEIGHT, isMounted : false, visibility : 'hidden', zoom : 100, currentPageNumber : 1, }); const mainRef = useRef(null); if(props.renderer == 'legacy') { rawPages = props.text.split('\\page'); } else { rawPages = props.text.split(/^\\page$/gm); } useEffect(()=>{ // Unmounting steps return ()=>{window.removeEventListener('resize', updateSize);}; }, []); const updateSize = ()=>{ setState((prevState)=>({ ...prevState, height : mainRef.current.parentNode.clientHeight, })); }; const getCurrentPage = (e)=>{ const { scrollTop, clientHeight, scrollHeight } = e.target; const totalScrollableHeight = scrollHeight - clientHeight; const currentPageNumber = Math.ceil((scrollTop / totalScrollableHeight) * rawPages.length); setState((prevState)=>({ ...prevState, currentPageNumber : currentPageNumber || 1 })); }; const isInView = (index)=>{ if(!state.isMounted) return false; if(index == props.currentEditorPage) //Already rendered before this step return false; if(Math.abs(index - state.currentPageNumber) <= 3) return true; return false; }; const renderDummyPage = (index)=>{ return

; }; const renderStyle = ()=>{ const cleanStyle = props.style; //DOMPurify.sanitize(props.style, purifyConfig); const themeStyles = props.themeBundle?.joinedStyles ?? ''; return
${cleanStyle} ` }} />; }; const renderPage = (pageText, index)=>{ if(props.renderer == 'legacy') { const html = MarkdownLegacy.render(pageText); return ; } else { pageText += `\n\n \n\\column\n `; //Artificial column break at page end to emulate column-fill:auto (until `wide` is used, when column-fill:balance will reappear) const html = Markdown.render(pageText, index); return ; } }; const renderPages = ()=>{ if(props.errors && props.errors.length) return renderedPages; if(rawPages.length != renderedPages.length) // Re-render all pages when page count changes renderedPages.length = 0; // Render currently-edited page first so cross-page effects (variables, links) can propagate out first renderedPages[props.currentEditorPage] = renderPage(rawPages[props.currentEditorPage], props.currentEditorPage); _.forEach(rawPages, (page, index)=>{ if((isInView(index) || !renderedPages[index]) && typeof window !== 'undefined'){ renderedPages[index] = renderPage(page, index); // Render any page not yet rendered, but only re-render those in PPR range } }); return renderedPages; }; const handleControlKeys = (e)=>{ if(!(e.ctrlKey || e.metaKey)) return; const P_KEY = 80; if(e.keyCode == P_KEY && props.allowPrint) printCurrentBrew(); if(e.keyCode == P_KEY) { e.stopPropagation(); e.preventDefault(); } }; const frameDidMount = ()=>{ //This triggers when iFrame finishes internal "componentDidMount" setTimeout(()=>{ //We still see a flicker where the style isn't applied yet, so wait 100ms before showing iFrame updateSize(); window.addEventListener('resize', updateSize); renderPages(); //Make sure page is renderable before showing setState((prevState)=>({ ...prevState, isMounted : true, visibility : 'visible' })); }, 100); }; const emitClick = ()=>{ // Allow clicks inside iFrame to interact with dropdowns, etc. from outside if(!window || !document) return; document.dispatchEvent(new MouseEvent('click')); }; //Toolbar settings: const handleZoom = (newZoom)=>{ setState((prevState)=>({ ...prevState, zoom : newZoom })); }; return ( <> {/*render dummy page while iFrame is mounting.*/} {!state.isMounted ?

{renderDummyPage(1)}

: null}

{/*render in iFrame so broken code doesn't crash the site.*/} {emitClick();}} >
{/* Apply CSS from Style tab and render pages from Markdown tab */} {state.isMounted && <> {renderStyle()}
{renderPages()}
}
); }; module.exports = BrewRenderer;