Merge branch 'master' into experimentalHeaderNavigation

client/homebrew/brewRenderer/brewRenderer.jsx

@@ -7,6 +7,7 @@ const _ = require('lodash');
 const MarkdownLegacy = require('naturalcrit/markdownLegacy.js');
 const Markdown = require('naturalcrit/markdown.js');
 const ErrorBar = require('./errorBar/errorBar.jsx');
+const ToolBar  = require('./toolBar/toolBar.jsx');
 
 //TODO: move to the brew renderer
 const RenderWarnings = require('homebrewery/renderWarnings/renderWarnings.jsx');
@@ -67,6 +68,8 @@ const BrewRenderer = (props)=>{
 		height             : PAGE_HEIGHT,
 		isMounted          : false,
 		visibility         : 'hidden'
+		zoom               : 100,
+		currentPageNumber  : 1,
 	});
 
 	const mainRef  = useRef(null);
@@ -89,11 +92,14 @@ const BrewRenderer = (props)=>{
 		}));
 	};
 
-	const handleScroll = (e)=>{
-		const target = e.target;
+	const getCurrentPage = (e)=>{
+		const { scrollTop, clientHeight, scrollHeight } = e.target;
+		const totalScrollableHeight = scrollHeight - clientHeight;
+		const currentPageNumber = Math.ceil((scrollTop / totalScrollableHeight) * rawPages.length);
+
 		setState((prevState)=>({
 			...prevState,
-			viewablePageNumber : Math.floor(target.scrollTop / target.scrollHeight * rawPages.length)
+			currentPageNumber : currentPageNumber || 1
 		}));
 	};
 
@@ -104,23 +110,12 @@ const BrewRenderer = (props)=>{
 		if(index == props.currentEditorPage)	//Already rendered before this step
 			return false;
 
-		if(Math.abs(index - state.viewablePageNumber) <= 3)
+		if(Math.abs(index - state.currentPageNumber) <= 3)
 			return true;
 
 		return false;
 	};
 
-	const renderPageInfo = ()=>{
-		return <div className='pageInfo' ref={mainRef}>
-			<div>
-				{props.renderer}
-			</div>
-			<div>
-				{state.viewablePageNumber + 1} / {rawPages.length}
-			</div>
-		</div>;
-	};
-
 	const renderDummyPage = (index)=>{
 		return <div className='phb page' id={`p${index + 1}`} key={index}>
 			<i className='fas fa-spinner fa-spin' />
@@ -190,11 +185,19 @@ const BrewRenderer = (props)=>{
 		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
-				? <div className='brewRenderer' onScroll={handleScroll}>
+				? <div className='brewRenderer' onScroll={getCurrentPage}>
 					<div className='pages'>
 						{renderDummyPage(1)}
 					</div>
@@ -202,11 +205,13 @@ const BrewRenderer = (props)=>{
 				: null}
 
 			<ErrorBar errors={props.errors} />
-			<div className='popups'>
+			<div className='popups' ref={mainRef}>
 				<RenderWarnings />
 				<NotificationPopup />
 			</div>
 
+			<ToolBar onZoomChange={handleZoom} currentPage={state.currentPageNumber}  totalPages={rawPages.length}/>
+
 			{/*render in iFrame so broken code doesn't crash the site.*/}
 			<Frame id='BrewRenderer' initialContent={INITIAL_CONTENT}
 				style={{ width: '100%', height: '100%', visibility: state.visibility }}
@@ -214,16 +219,17 @@ const BrewRenderer = (props)=>{
 				onClick={()=>{emitClick();}}
 			>
 				<div className={'brewRenderer'}
-					onScroll={handleScroll}
+					onScroll={getCurrentPage}
 					onKeyDown={handleControlKeys}
 					tabIndex={-1}
 					style={{ height: state.height }}>
+
 					{/* Apply CSS from Style tab and render pages from Markdown tab */}
 					{state.isMounted
 						&&
 						<>
 							{renderStyle()}
-							<div className='pages' lang={`${props.lang || 'en'}`} ref={pagesRef}>
+							<div className='pages' lang={`${props.lang || 'en'}`} ref={pagesRef} style={{ zoom: `${state.zoom}%` }}>
 								{renderPages()}
 							</div>
 						</>
@@ -231,7 +237,6 @@ const BrewRenderer = (props)=>{
 				</div>
 				{props.showHeaderNav ? <HeaderNav ref={pagesRef} /> : <></>}
 			</Frame>
-			{renderPageInfo()}
 		</>
 	);
 };