further refactor js

Turn the div adapters into injectable files so that each PdfContainer can be customized. And the adapters can be used in different PdfContainers as well.

src/main/resources/static/js/multitool/DragDropManager.js

@@ -8,9 +8,8 @@ class DragDropManager {
     draggedImageEl;
     hoveredEl;
 
-    constructor(id, movePageTo) {
+    constructor(id) {
         this.dragContainer = document.getElementById(id);
-        this.movePageTo = movePageTo;
         this.pageDragging = false;
         this.hoveredEl = undefined;
         this.draggelEl = undefined
@@ -19,8 +18,6 @@ class DragDropManager {
         this.startDraggingPage = this.startDraggingPage.bind(this);
         this.onDragEl = this.onDragEl.bind(this);
         this.stopDraggingPage = this.stopDraggingPage.bind(this);
-        this.attachDragDropCallbacks = this.attachDragDropCallbacks.bind(this);
-
     }
 
     startDraggingPage(div, imageSrc) {
@@ -34,9 +31,7 @@ class DragDropManager {
         this.draggedImageEl.style.left = screenX;
         this.draggedImageEl.style.right = screenY;
         this.dragContainer.appendChild(imgEl);
-        window.addEventListener('mouseup', (e) => {
+        window.addEventListener('mouseup', this.stopDraggingPage)
-            this.stopDraggingPage();
-        })
         window.addEventListener('mousemove', this.onDragEl)
     }
 
@@ -51,6 +46,7 @@ class DragDropManager {
     
     stopDraggingPage() {
         window.removeEventListener('mousemove', this.onDragEl);
+        window.removeEventListener('mouseup', this.stopDraggingPage)
         this.draggedImageEl = undefined;
         this.pageDragging = false;
         this.draggedEl.classList.remove('dragging');
@@ -61,10 +57,14 @@ class DragDropManager {
         this.movePageTo(this.draggedEl, this.hoveredEl);
     }
 
+    setActions({ movePageTo }) {
+        this.movePageTo = movePageTo;
+    }
 
-    attachDragDropCallbacks(div, imageSrc) {
+
+    adapt(div) {
         const onDragStart = () => {
-            this.startDraggingPage(div, imageSrc);
+            this.startDraggingPage(div, div.querySelector('img').src);
         }
         
         const onMouseEnter = () => {
@@ -82,6 +82,8 @@ class DragDropManager {
         div.addEventListener('dragstart', onDragStart);
         div.addEventListener('mouseenter', onMouseEnter);
         div.addEventListener('mouseleave', onMouseLeave);
+
+        return div;
     }
 }
 

src/main/resources/static/js/multitool/PdfActionsManager.js

@@ -1,73 +1,75 @@
 class PdfActionsManager {
-    callbacks;
     pageDirection; 
-    constructor(id, { movePageTo, addPdfs, rotateElement }) {
+    pagesContainer;
+
+    constructor(id) {
+        this.pagesContainer = document.getElementById(id);
         this.pageDirection = document.documentElement.getAttribute("lang-direction");
-        const moveUpButtonCallback = e => {
-            var imgContainer = e.target;
-            while (!imgContainer.classList.contains(id)) {
-                imgContainer = imgContainer.parentNode;
     }
 
+    getPageContainer(element) {
+        var container = element
+        while (!container.classList.contains('page-container')) {
+            container = container.parentNode;
+        }
+        return container;
+    }
+
+    moveUpButtonCallback(e) {
+        var imgContainer = this.getPageContainer(e.target);
+        
         const sibling = imgContainer.previousSibling;
         if (sibling) {
-                movePageTo(imgContainer, sibling, true);
+            this.movePageTo(imgContainer, sibling, true);
         }
-        };
-        const moveDownButtonCallback = e => {
-            var imgContainer = e.target;
-            while (!imgContainer.classList.contains(id)) {
-                imgContainer = imgContainer.parentNode;
     }
+
+    moveDownButtonCallback(e) {
+        var imgContainer = this.getPageContainer(e.target);
         const sibling = imgContainer.nextSibling;
         if (sibling) {
-                movePageTo(imgContainer, sibling.nextSibling, true);
+            this.movePageTo(imgContainer, sibling.nextSibling, true);
         }
     };
-        const rotateCCWButtonCallback = e => {
+
-            var imgContainer = e.target;
+    rotateCCWButtonCallback(e) {
-            while (!imgContainer.classList.contains(id)) {
+        var imgContainer = this.getPageContainer(e.target);
-                imgContainer = imgContainer.parentNode;
-            }
         const img = imgContainer.querySelector("img");
         
-            rotateElement(img, -90)
+        this.rotateElement(img, -90)
     };
-        const rotateCWButtonCallback = e => {
+
-            var imgContainer = e.target;
+    rotateCWButtonCallback(e) {
-            while (!imgContainer.classList.contains(id)) {
+        var imgContainer = this.getPageContainer(e.target);
-                imgContainer = imgContainer.parentNode;
-            }
         const img = imgContainer.querySelector("img");
         
-            rotateElement(img, 90)
+        this.rotateElement(img, 90)
-        };
-        const deletePageButtonCallback = e => {
-            var imgContainer = e.target;
-            while (!imgContainer.classList.contains(id)) {
-                imgContainer = imgContainer.parentNode;
-            }
-            pagesContainer.removeChild(imgContainer);
-        };
-        const insertFileButtonCallback = e => {
-            var imgContainer = e.target;
-            while (!imgContainer.classList.contains(id)) {
-                imgContainer = imgContainer.parentNode;
-            }
-            addPdfs(imgContainer)
     };
 
-        this.callbacks = {
+    deletePageButtonCallback(e) {
-            moveUpButtonCallback,
+        var imgContainer = this.getPageContainer(e.target);
-            moveDownButtonCallback,
+        this.pagesContainer.removeChild(imgContainer);
-            rotateCCWButtonCallback,
+    };
-            rotateCWButtonCallback,
+
-            deletePageButtonCallback,
+    insertFileButtonCallback(e) {
-            insertFileButtonCallback
+        var imgContainer = this.getPageContainer(e.target);
-        }
+        this.addPdfs(imgContainer)
+    };
+
+    setActions({ movePageTo, addPdfs, rotateElement }) {
+        this.movePageTo = movePageTo;
+        this.addPdfs = addPdfs;
+        this.rotateElement = rotateElement;
+
+        this.moveUpButtonCallback = this.moveUpButtonCallback.bind(this);
+        this.moveDownButtonCallback = this.moveDownButtonCallback.bind(this);
+        this.rotateCCWButtonCallback = this.rotateCCWButtonCallback.bind(this);
+        this.rotateCWButtonCallback = this.rotateCWButtonCallback.bind(this);
+        this.deletePageButtonCallback = this.deletePageButtonCallback.bind(this);
+        this.insertFileButtonCallback = this.insertFileButtonCallback.bind(this);
     }
 
-    attachPDFActions(div) {
+    adapt(div) {
         const leftDirection = this.pageDirection === 'rtl' ? 'right' : 'left'
         const rightDirection = this.pageDirection === 'rtl' ? 'left' : 'right'
         const buttonContainer = document.createElement('div');
@@ -77,13 +79,13 @@ class PdfActionsManager {
         const moveUp = document.createElement('button');
         moveUp.classList.add("move-left-button","btn", "btn-secondary");
         moveUp.innerHTML = `<i class="bi bi-arrow-${leftDirection}-short"></i>`;
-        moveUp.onclick = this.callbacks.moveUpButtonCallback;
+        moveUp.onclick = this.moveUpButtonCallback;
         buttonContainer.appendChild(moveUp);
 
         const moveDown = document.createElement('button');
         moveDown.classList.add("move-right-button","btn", "btn-secondary");
         moveDown.innerHTML = `<i class="bi bi-arrow-${rightDirection}-short"></i>`;
-        moveDown.onclick = this.callbacks.moveDownButtonCallback;
+        moveDown.onclick = this.moveDownButtonCallback;
         buttonContainer.appendChild(moveDown);
         
         const rotateCCW = document.createElement('button');
@@ -92,7 +94,7 @@ class PdfActionsManager {
                             <path fill-rule="evenodd" d="M8 3a5 5 0 1 1-4.546 2.914.5.5 0 0 0-.908-.417A6 6 0 1 0 8 2v1z" />
                             <path d="M8 4.466V.534a.25.25 0 0 0-.41-.192L5.23 2.308a.25.25 0 0 0 0 .384l2.36 1.966A.25.25 0 0 0 8 4.466z" />
                         </svg>`;
-        rotateCCW.onclick = this.callbacks.rotateCCWButtonCallback;
+        rotateCCW.onclick = this.rotateCCWButtonCallback;
         buttonContainer.appendChild(rotateCCW);
 
         const rotateCW = document.createElement('button');
@@ -101,7 +103,7 @@ class PdfActionsManager {
                             <path fill-rule="evenodd" d="M8 3a5 5 0 1 0 4.546 2.914.5.5 0 0 1 .908-.417A6 6 0 1 1 8 2v1z" />
                             <path d="M8 4.466V.534a.25.25 0 0 1 .41-.192l2.36 1.966c.12.1.12.284 0 .384L8.41 4.658A.25.25 0 0 1 8 4.466z" />
                         </svg>`;
-        rotateCW.onclick = this.callbacks.rotateCWButtonCallback;
+        rotateCW.onclick = this.rotateCWButtonCallback;
         buttonContainer.appendChild(rotateCW);
 
         const deletePage = document.createElement('button');
@@ -110,7 +112,7 @@ class PdfActionsManager {
                             <path d="M5.5 5.5A.5.5 0 0 1 6 6v6a.5.5 0 0 1-1 0V6a.5.5 0 0 1 .5-.5Zm2.5 0a.5.5 0 0 1 .5.5v6a.5.5 0 0 1-1 0V6a.5.5 0 0 1 .5-.5Zm3 .5a.5.5 0 0 0-1 0v6a.5.5 0 0 0 1 0V6Z"/>
                             <path d="M14.5 3a1 1 0 0 1-1 1H13v9a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V4h-.5a1 1 0 0 1-1-1V2a1 1 0 0 1 1-1H6a1 1 0 0 1 1-1h2a1 1 0 0 1 1 1h3.5a1 1 0 0 1 1 1v1ZM4.118 4 4 4.059V13a1 1 0 0 0 1 1h6a1 1 0 0 0 1-1V4.059L11.882 4H4.118ZM2.5 3h11V2h-11v1Z"/>
                         </svg>`;
-        deletePage.onclick = this.callbacks.deletePageButtonCallback;
+        deletePage.onclick = this.deletePageButtonCallback;
         buttonContainer.appendChild(deletePage);
 
         div.appendChild(buttonContainer);
@@ -128,7 +130,7 @@ class PdfActionsManager {
                                 <path d="M8 6.5a.5.5 0 0 1 .5.5v1.5H10a.5.5 0 0 1 0 1H8.5V11a.5.5 0 0 1-1 0V9.5H6a.5.5 0 0 1 0-1h1.5V7a.5.5 0 0 1 .5-.5z"/>
                                 <path d="M14 4.5V14a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V2a2 2 0 0 1 2-2h5.5L14 4.5zm-3 0A1.5 1.5 0 0 1 9.5 3V1H4a1 1 0 0 0-1 1v12a1 1 0 0 0 1 1h8a1 1 0 0 0 1-1V4.5h-2z"/>
                             </svg>`;
-        insertFileButton.onclick = this.callbacks.insertFileButtonCallback;
+        insertFileButton.onclick = this.insertFileButtonCallback;
         insertFileButtonContainer.appendChild(insertFileButton);
         
         div.appendChild(insertFileButtonContainer);
@@ -150,6 +152,8 @@ class PdfActionsManager {
         insertFileButtonRightContainer.appendChild(insertFileButtonRight);
 
         div.appendChild(insertFileButtonRightContainer);
+
+        return div;
     }
 }
 

src/main/resources/static/js/multitool/horizontalScroll.js

@@ -1,12 +1,10 @@
-
-
 const scrollDivHorizontally = (id) => {
     var scrollDelta = 0; // variable to store the accumulated scroll delta
     var isScrolling = false; // variable to track if scroll is already in progress
-    const pagesContainerWrapper = document.getElementById(id);
+    const divToScrollHorizontally = document.getElementById(id)
     function scrollLoop() {
         // Scroll the div horizontally by a fraction of the accumulated scroll delta
-        pagesContainerWrapper.scrollLeft += scrollDelta * 0.1;
+        divToScrollHorizontally.scrollLeft += scrollDelta * 0.1;
 
         // Reduce the accumulated scroll delta by a fraction
         scrollDelta *= 0.9;
@@ -19,7 +17,7 @@ const scrollDivHorizontally = (id) => {
         }
     }
 
-    const divToScrollHorizontally = document.getElementById(id)
+    
     divToScrollHorizontally.addEventListener("wheel", function(e) {
         e.preventDefault(); // prevent default mousewheel behavior
 

src/main/resources/static/js/multitool/imageHighlighter.js

@@ -1,27 +1,39 @@
-const getImageHighlighterCallback = (id) => {
+class ImageHiglighter {
-    const imageHighlighter = document.getElementById(id);
+    imageHighlighter;
-    imageHighlighter.onclick = () => {
+    constructor(id) {
-        imageHighlighter.childNodes.forEach((child) => {
+        this.imageHighlighter = document.getElementById(id);
+        this.imageHighlightCallback = this.imageHighlightCallback.bind(this);
+        this.imageHighlighter.onclick = () => {
+            this.imageHighlighter.childNodes.forEach((child) => {
                 child.classList.add('remove');
                 setTimeout(() => {
-                imageHighlighter.removeChild(child);
+                    this.imageHighlighter.removeChild(child);
                 }, 100)
             })
         }
+    }
 
-    const imageHighlightCallback = (highlightEvent) => {
+    imageHighlightCallback(highlightEvent) {
         var bigImg = document.createElement('img');
         bigImg.onclick = (imageClickEvent) => {
-            // This prevents the highlighter's onClick from closing the image when clicking on the image
+            // This prevents the highlighter's onClick from closing the image when clicking
-            // instead of next to it.
+            // on the image instead of next to it.
             imageClickEvent.preventDefault();
             imageClickEvent.stopPropagation();
         };
         bigImg.src = highlightEvent.target.src;
-        imageHighlighter.appendChild(bigImg);
+        this.imageHighlighter.appendChild(bigImg);
     };
 
-    return imageHighlightCallback
+    setActions() {
+        // not needed in this case
+    }
+
+    adapt(div) {
+        const img = div.querySelector('.page-image');
+        img.addEventListener('click', this.imageHighlightCallback)
+        return div;
+    }
 }
 
-export default getImageHighlighterCallback;
+export default ImageHiglighter;

src/main/resources/static/js/multitool/pdfContainer.js

@@ -1,23 +1,43 @@
-import DragDropManager from "./dragDrop.js";
+class PdfContainer {
-import scrollDivHorizontally from "./horizontalScroll.js";
+    fileName;
-import getImageHighlighterCallback from "./imageHighlighter.js";
+    pagesContainer;
-import PdfActionsManager from './pdfActions.js';
+    pagesContainerWrapper;
+    pdfAdapters;
 
-const createPdfContainer = (id, wrapperId, highlighterId, dragElId) => {
+    constructor(id, wrapperId, pdfAdapters) {
-    var fileName = null;
+        this.fileName = null;
-    const pagesContainer = document.getElementById(id);
+        this.pagesContainer = document.getElementById(id)
-    const pagesContainerWrapper = document.getElementById(wrapperId);
+        this.pagesContainerWrapper = document.getElementById(wrapperId);
+        this.movePageTo = this.movePageTo.bind(this);
+        this.addPdfs = this.addPdfs.bind(this);
+        this.rotateElement = this.rotateElement.bind(this);
+        this.rotateAll = this.rotateAll.bind(this);
+        this.exportPdf = this.exportPdf.bind(this);
 
+        this.pdfAdapters = pdfAdapters;
 
-    const movePageTo = (startElement, endElement, scrollTo = false) => {
+        this.pdfAdapters.forEach(adapter => {
-        const childArray = Array.from(pagesContainer.childNodes);
+            adapter.setActions({
+                movePageTo: this.movePageTo,
+                addPdfs: this.addPdfs,
+                rotateElement: this.rotateElement,
+            })
+        })
+
+        window.addPdfs = this.addPdfs;
+        window.exportPdf = this.exportPdf;
+        window.rotateAll = this.rotateAll;
+    }
+
+    movePageTo(startElement, endElement, scrollTo = false) {
+        const childArray = Array.from(this.pagesContainer.childNodes);
         const startIndex = childArray.indexOf(startElement);
         const endIndex = childArray.indexOf(endElement);
-        pagesContainer.removeChild(startElement);
+        this.pagesContainer.removeChild(startElement);
         if(!endElement) {
-            pagesContainer.append(startElement);
+            this.pagesContainer.append(startElement);
         } else {
-            pagesContainer.insertBefore(startElement, endElement);
+            this.pagesContainer.insertBefore(startElement, endElement);
         }
 
         if(scrollTo) {
@@ -26,13 +46,13 @@ const createPdfContainer = (id, wrapperId, highlighterId, dragElId) => {
                 ?  0-width
                 : width;
             
-            pagesContainerWrapper.scroll({
+            this.pagesContainerWrapper.scroll({
-                left: pagesContainerWrapper.scrollLeft + vector,
+                left: this.pagesContainerWrapper.scrollLeft + vector,
             })
         }
     }
 
-    function addPdfs(nextSiblingElement) {
+    addPdfs(nextSiblingElement) {
         var input = document.createElement('input');
         input.type = 'file';
         input.multiple = true;
@@ -40,9 +60,9 @@ const createPdfContainer = (id, wrapperId, highlighterId, dragElId) => {
 
         input.onchange = async(e) => {
             const files = e.target.files;
-            fileName = files[0].name;
+            this.fileName = files[0].name;
             for (var i=0; i < files.length; i++) {
-                addPdfFile(files[i], nextSiblingElement);
+                this.addPdfFile(files[i], nextSiblingElement);
             }
 
             document.querySelectorAll(".enable-on-file").forEach(element => {
@@ -53,7 +73,7 @@ const createPdfContainer = (id, wrapperId, highlighterId, dragElId) => {
         input.click();
     }
 
-    function rotateElement(element, deg) {
+    rotateElement(element, deg) {
         var lastTransform = element.style.rotate;
         if (!lastTransform) {
             lastTransform = "0";
@@ -64,21 +84,8 @@ const createPdfContainer = (id, wrapperId, highlighterId, dragElId) => {
         element.style.rotate = newAngle + "deg";
     }
 
-    scrollDivHorizontally(wrapperId);
+    async addPdfFile(file, nextSiblingElement) {
-
+        const { renderer, pdfDocument } = await this.loadFile(file);
-    var imageHighlighterCallback;
-    if (highlighterId) {
-        imageHighlighterCallback = getImageHighlighterCallback(highlighterId);
-    }
-    var dragDropManager;
-    if(dragElId) {
-        dragDropManager = new DragDropManager('drag-container', movePageTo);
-    }
-
-    var pdfActionManager = new PdfActionsManager('page-container', { movePageTo, addPdfs, rotateElement });
-
-    async function addPdfFile(file, nextSiblingElement) {
-        const { renderer, pdfDocument } = await loadFile(file);
 
         for (var i=0; i < renderer.pageCount; i++) {
             const div = document.createElement('div');
@@ -94,32 +101,25 @@ const createPdfContainer = (id, wrapperId, highlighterId, dragElId) => {
             img.doc = pdfDocument;
             div.appendChild(img);
 
-            
+            this.pdfAdapters.forEach((adapter) => {
-            if(dragDropManager) {
+                adapter.adapt?.(div)
-                dragDropManager.attachDragDropCallbacks(div, imageSrc);
+            })
-            }
-
-            /**
-             *  Making pages larger when clicking on them
-             */
-            if(imageHighlighterCallback) {
-                img.addEventListener('click', imageHighlighterCallback)
-            }
-
-            /**
-             *  Rendering the various buttons to manipulate and move pdf pages
-             */
-            pdfActionManager.attachPDFActions(div);
-
             if (nextSiblingElement) {
-                pagesContainer.insertBefore(div, nextSiblingElement);
+                this.pagesContainer.insertBefore(div, nextSiblingElement);
             } else {
-                pagesContainer.appendChild(div);
+                this.pagesContainer.appendChild(div);
             }
         }
     }
 
-    async function toRenderer(objectUrl) {
+    async loadFile(file) {
+        var objectUrl = URL.createObjectURL(file);
+        var pdfDocument = await this.toPdfLib(objectUrl);
+        var renderer = await this.toRenderer(objectUrl);
+        return { renderer, pdfDocument };
+    }
+
+    async toRenderer(objectUrl) {
         const pdf = await pdfjsLib.getDocument(objectUrl).promise;
         return {
             document: pdf,
@@ -150,31 +150,26 @@ const createPdfContainer = (id, wrapperId, highlighterId, dragElId) => {
         };
     }
 
-    async function toPdfLib(objectUrl) {
+    async toPdfLib(objectUrl) {
         const existingPdfBytes = await fetch(objectUrl).then(res => res.arrayBuffer());
         const pdfDoc = await PDFLib.PDFDocument.load(existingPdfBytes);
         return pdfDoc;
     }
 
-    async function loadFile(file) {
-        var objectUrl = URL.createObjectURL(file);
-        var pdfDocument = await toPdfLib(objectUrl);
-        var renderer = await toRenderer(objectUrl);
-        return { renderer, pdfDocument };
-    }
     
-    function rotateAll(deg) {
+
-        for (var i=0; i<pagesContainer.childNodes.length; i++) {
+    rotateAll(deg) {
-            const img = pagesContainer.childNodes[i].querySelector("img");
+        for (var i=0; i<this.pagesContainer.childNodes.length; i++) {
+            const img = this.pagesContainer.childNodes[i].querySelector("img");
             if (!img) continue;
-            rotateElement(img, deg)
+            this.rotateElement(img, deg)
         }
     }
 
-    async function exportPdf() {
+    async exportPdf() {
         const pdfDoc = await PDFLib.PDFDocument.create();
-        for (var i=0; i<pagesContainer.childNodes.length; i++) {
+        for (var i=0; i<this.pagesContainer.childNodes.length; i++) {
-            const img = pagesContainer.childNodes[i].querySelector("img");
+            const img = this.pagesContainer.childNodes[i].querySelector("img");
             if (!img) continue;
             const pages = await pdfDoc.copyPages(img.doc, [img.pageIdx])
             const page = pages[0];
@@ -202,16 +197,10 @@ const createPdfContainer = (id, wrapperId, highlighterId, dragElId) => {
             // Download the file
             const downloadLink = document.createElement('a');
             downloadLink.href = url;
-            downloadLink.download = fileName ? fileName : 'managed.pdf';
+            downloadLink.download = this.fileName ? this.fileName : 'managed.pdf';
             downloadLink.click();
         }
     }
-
-    return {
-        addPdfs,
-        rotateAll,
-        exportPdf,
-    }
 }
 
-export default createPdfContainer;
+export default PdfContainer;

src/main/resources/templates/multi-tool.html

@@ -52,7 +52,6 @@
 
                         </div>
                     </div>
-
                 </div>
             </div>
         </div>
@@ -61,20 +60,32 @@
     <div id="drag-container"></div>
     
     <script type="module">
-        import createPdfContainer from '/js/multitool/pdfContainer.js';
+        import PdfContainer from '/js/multitool/PdfContainer.js';
-        const {
+        import DragDropManager from "/js/multitool/DragDropManager.js";
-            addPdfs,
+        import scrollDivHorizontally from "/js/multitool/horizontalScroll.js";
-            exportPdf,
+        import ImageHighlighter from "/js/multitool/ImageHighlighter.js";
-            rotateAll,
+        import PdfActionsManager from '/js/multitool/PdfActionsManager.js';
-        } = createPdfContainer(
+
+        // enables drag and drop
+        const dragDropManager = new DragDropManager('drag-container');
+        // enables image highlight on click
+        const imageHighlighter = new ImageHighlighter('image-highlighter');
+        // enables the default action buttons on each pdf
+        const pdfActionsManager = new PdfActionsManager('pages-container');
+
+        // Scroll the wrapper horizontally
+        scrollDivHorizontally('pages-container-wrapper');
+
+        // Automatically exposes rotateAll, addPdfs and exportPdf to the window for the global buttons.
+        const pdfContainer = new PdfContainer(
             'pages-container',
             'pages-container-wrapper',
-            'image-highlighter',
+            [
-            'drag-container'
+                dragDropManager,
-        );
+                imageHighlighter,
-        window.addPdfs = addPdfs;
+                pdfActionsManager,
-        window.exportPdf = exportPdf;
+            ]
-        window.rotateAll = rotateAll;
+        )
     </script>
 
     <style>