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Merge pull request #105 from jordyjordy/drag-n-drop

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Drag n drop
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Anthony Stirling 2023-05-01 16:36:36 +01:00 committed by GitHub
commit 2d4aff3b08
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9 changed files with 817 additions and 509 deletions
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78
src/main/resources/static/css/dragdrop.css Normal file
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#drag-container {
position: fixed;
display:flex;
inset: 0;
pointer-events: none;
z-index: 10000;
visibility: hidden;
}
#drag-container:not(:empty) {
visibility: visible;
}
#drag-container .dragged-img {
position: fixed;
max-width: 200px;
max-height: 200px;
box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.58);
transform-origin: top left;
}
.drag-manager_dragging {
width: 0px;
visibility: hidden;
}
.drag-manager_draghover {
width: 375px !important;
}
.drag-manager_draghover .insert-file-button-container {
display: none !important;
}
.drag-manager_draghover .button-container {
visibility: hidden !important;
}
html[lang-direction=ltr] .drag-manager_draghover img {
left: calc(50% + 62.5px) !important;
}
html[lang-direction=rtl] .drag-manager_draghover img {
left: 125px
}
.drag-manager_dragging-container .hide-on-drag {
display: none !important;
}
.drag-manager_endpoint {
width: 80px;
height: 100%;
background-color: #FFFFFF10;
transition: width 0.1s;
animation: end-drop-expand .3s ease;
display: flex;
align-items: center;
justify-content: center;
}
.drag-manager_endpoint svg {
width: 50px;
height: 50px;
}
.drag-manager_endpoint.drag-manager_draghover {
width: 150px !important;
}
@keyframes end-drop-expand {
from {
width: 0;
}
to {
width: 80px;
}
}

40
src/main/resources/static/css/imageHighlighter.css Normal file
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#image-highlighter {
position: fixed;
display:flex;
inset: 0;
z-index: 10000;
background-color: rgba(0, 0, 0, 0);
visibility: hidden;
align-items: center;
justify-content: center;
transition: visbility 0.1s linear, background-color 0.1s linear;
}
#image-highlighter > * {
max-width: 80vw;
max-height: 80vh;
animation: image-highlight .1s linear;
transition: transform .1s linear, opacity .1s linear;
}
#image-highlighter > *.remove {
transform: scale(0.8) !important;
opacity: 0 !important;
}
#image-highlighter:not(:empty) {
background-color: rgba(0, 0, 0, 0.37);
visibility: visible;
}
@keyframes image-highlight {
from {
transform: scale(0.8);
opacity: 0;
}
to {
transform: scale(1);
opacity: 1;
}
}

87
src/main/resources/static/css/pdfActions.css Normal file
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.pdf-actions_button-container {
z-index: 2;
display:flex;
opacity: 0;
transition: opacity 0.1s linear;
}
.pdf-actions_container:hover .pdf-actions_button-container {
opacity: 1;
}
.pdf-actions_button-container > * {
padding: 0.25rem 0.5rem;
margin: 3px;
display: block;
}
.pdf-actions_container svg {
width: 16px;
height: 16px;
}
.pdf-actions_container:nth-child(1) .pdf-actions_move-left-button {
display: none;
}
.pdf-actions_container:last-child .pdf-actions_move-right-button {
display: none;
}
/* "insert pdf" buttons that appear on the right when hover */
.pdf-actions_insert-file-button-container {
translate: 0 -50%;
width: 80px;
height: 100%;
z-index: 1;
opacity: 0;
transition: opacity 0.2s;
}
.pdf-actions_insert-file-button-container.left {
left: -20px;
}
.pdf-actions_insert-file-button-container.right {
right: -20px;
}
html[lang-direction=ltr] .pdf-actions_insert-file-button-container.right {
display:none;
}
html[lang-direction=rtl] .pdf-actions_insert-file-button-container.left {
display:none;
}
.pdf-actions_insert-file-button-container.left .pdf-actions_insert-file-button {
left: 0;
translate: 0 -50%;
}
.pdf-actions_insert-file-button-container.right .pdf-actions_insert-file-button {
right: 0;
translate: 0 -50%;
}
html[lang-direction=ltr] .pdf-actions_container:last-child > .pdf-actions_insert-file-button-container.right {
display: block;
}
html[lang-direction=rtl] .pdf-actions_container:last-child > .pdf-actions_insert-file-button-container.left {
display: block;
}
.pdf-actions_insert-file-button-container:hover {
opacity: 1;
transition: opacity 0.05s;
}
.pdf-actions_insert-file-button {
position: absolute;
top: 50%;
right: 50%;
translate: 50% -50%;
aspect-ratio: 1;
border-radius: 100px;
}

127
src/main/resources/static/js/multitool/DragDropManager.js Normal file
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class DragDropManager {
dragContainer;
wrapper;
pageDirection;
movePageTo;
pageDragging;
draggelEl;
draggedImageEl;
hoveredEl;
endInsertionElement;
constructor(id, wrapperId) {
this.dragContainer = document.getElementById(id);
this.pageDirection = document.documentElement.getAttribute("lang-direction");
this.wrapper = document.getElementById(wrapperId);
this.pageDragging = false;
this.hoveredEl = undefined;
this.draggelEl = undefined
this.draggedImageEl = undefined;
var styleElement = document.createElement('link');
styleElement.rel = 'stylesheet';
styleElement.href = 'css/dragdrop.css'
document.head.appendChild(styleElement);
const div = document.createElement('div');
div.classList.add('drag-manager_endpoint');
div.innerHTML = `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-file-earmark-arrow-down" viewBox="0 0 16 16">
<path d="M8.5 6.5a.5.5 0 0 0-1 0v3.793L6.354 9.146a.5.5 0 1 0-.708.708l2 2a.5.5 0 0 0 .708 0l2-2a.5.5 0 0 0-.708-.708L8.5 10.293V6.5z"/>
<path d="M14 14V4.5L9.5 0H4a2 2 0 0 0-2 2v12a2 2 0 0 0 2 2h8a2 2 0 0 0 2-2zM9.5 3A1.5 1.5 0 0 0 11 4.5h2V14a1 1 0 0 1-1 1H4a1 1 0 0 1-1-1V2a1 1 0 0 1 1-1h5.5v2z"/>
</svg>`
this.endInsertionElement = div;
this.startDraggingPage = this.startDraggingPage.bind(this);
this.onDragEl = this.onDragEl.bind(this);
this.stopDraggingPage = this.stopDraggingPage.bind(this);
this.adapt(div);
}
startDraggingPage(div,) {
this.pageDragging = true;
this.draggedEl = div;
const img = div.querySelector('img');
div.classList.add('drag-manager_dragging');
const imageSrc = img.src;
const imgEl = document.createElement('img');
imgEl.classList.add('dragged-img');
imgEl.src = imageSrc;
this.draggedImageEl = imgEl;
imgEl.style.left = screenX;
imgEl.style.right = screenY;
imgEl.style.transform = `rotate(${img.style.rotate === '' ? '0deg' : img.style.rotate}) translate(-50%, -50%)`;
this.dragContainer.appendChild(imgEl);
window.addEventListener('mouseup', this.stopDraggingPage)
window.addEventListener('mousemove', this.onDragEl)
this.wrapper.classList.add('drag-manager_dragging-container');
this.wrapper.appendChild(this.endInsertionElement);
}
onDragEl(mouseEvent) {
const { clientX, clientY } = mouseEvent;
if(this.draggedImageEl) {
this.draggedImageEl.style.left = `${clientX}px`;
this.draggedImageEl.style.top = `${clientY}px`;
}
}
stopDraggingPage() {
window.removeEventListener('mousemove', this.onDragEl);
this.wrapper.classList.remove('drag-manager_dragging-container');
this.wrapper.removeChild(this.endInsertionElement);
window.removeEventListener('mouseup', this.stopDraggingPage)
this.draggedImageEl = undefined;
this.pageDragging = false;
this.draggedEl.classList.remove('drag-manager_dragging');
this.hoveredEl?.classList.remove('drag-manager_draghover');
this.dragContainer.childNodes.forEach((dragChild) => {
this.dragContainer.removeChild(dragChild);
})
if(!this.hoveredEl) {
return;
}
if(this.hoveredEl === this.endInsertionElement) {
this.movePageTo(this.draggedEl);
return;
}
this.movePageTo(this.draggedEl, this.hoveredEl);
}
setActions({ movePageTo }) {
this.movePageTo = movePageTo;
}
adapt(div) {
const onDragStart = () => {
this.startDraggingPage(div);
}
const onMouseEnter = () => {
if (this.pageDragging) {
this.hoveredEl = div;
div.classList.add('drag-manager_draghover');
}
}
const onMouseLeave = () => {
this.hoveredEl = undefined
div.classList.remove('drag-manager_draghover');
}
div.addEventListener('dragstart', onDragStart);
div.addEventListener('mouseenter', onMouseEnter);
div.addEventListener('mouseleave', onMouseLeave);
return div;
}
}
export default DragDropManager;

46
src/main/resources/static/js/multitool/ImageHighlighter.js Normal file
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class ImageHiglighter {
imageHighlighter;
constructor(id) {
this.imageHighlighter = document.getElementById(id);
this.imageHighlightCallback = this.imageHighlightCallback.bind(this);
var styleElement = document.createElement('link');
styleElement.rel = 'stylesheet';
styleElement.href = 'css/imageHighlighter.css'
document.head.appendChild(styleElement);
this.imageHighlighter.onclick = () => {
this.imageHighlighter.childNodes.forEach((child) => {
child.classList.add('remove');
setTimeout(() => {
this.imageHighlighter.removeChild(child);
}, 100)
})
}
}
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 instead of next to it.
imageClickEvent.preventDefault();
imageClickEvent.stopPropagation();
};
bigImg.src = highlightEvent.target.src;
this.imageHighlighter.appendChild(bigImg);
};
setActions() {
// not needed in this case
}
adapt(div) {
const img = div.querySelector('.page-image');
img.addEventListener('click', this.imageHighlightCallback)
return div;
}
}
export default ImageHiglighter;

167
src/main/resources/static/js/multitool/PdfActionsManager.js Normal file
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class PdfActionsManager {
pageDirection;
pagesContainer;
constructor(id) {
this.pagesContainer = document.getElementById(id);
this.pageDirection = document.documentElement.getAttribute("lang-direction");
var styleElement = document.createElement('link');
styleElement.rel = 'stylesheet';
styleElement.href = 'css/pdfActions.css'
document.head.appendChild(styleElement);
}
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) {
this.movePageTo(imgContainer, sibling, true);
}
}
moveDownButtonCallback(e) {
var imgContainer = this.getPageContainer(e.target);
const sibling = imgContainer.nextSibling;
if (sibling) {
this.movePageTo(imgContainer, sibling.nextSibling, true);
}
};
rotateCCWButtonCallback(e) {
var imgContainer = this.getPageContainer(e.target);
const img = imgContainer.querySelector("img");
this.rotateElement(img, -90)
};
rotateCWButtonCallback(e) {
var imgContainer = this.getPageContainer(e.target);
const img = imgContainer.querySelector("img");
this.rotateElement(img, 90)
};
deletePageButtonCallback(e) {
var imgContainer = this.getPageContainer(e.target);
this.pagesContainer.removeChild(imgContainer);
};
insertFileButtonCallback(e) {
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);
}
adapt(div) {
div.classList.add('pdf-actions_container');
const leftDirection = this.pageDirection === 'rtl' ? 'right' : 'left'
const rightDirection = this.pageDirection === 'rtl' ? 'left' : 'right'
const buttonContainer = document.createElement('div');
buttonContainer.classList.add("pdf-actions_button-container", "hide-on-drag");
const moveUp = document.createElement('button');
moveUp.classList.add("pdf-actions_move-left-button","btn", "btn-secondary");
moveUp.innerHTML = `<i class="bi bi-arrow-${leftDirection}-short"></i>`;
moveUp.onclick = this.moveUpButtonCallback;
buttonContainer.appendChild(moveUp);
const moveDown = document.createElement('button');
moveDown.classList.add("pdf-actions_move-right-button","btn", "btn-secondary");
moveDown.innerHTML = `<i class="bi bi-arrow-${rightDirection}-short"></i>`;
moveDown.onclick = this.moveDownButtonCallback;
buttonContainer.appendChild(moveDown);
const rotateCCW = document.createElement('button');
rotateCCW.classList.add("btn", "btn-secondary");
rotateCCW.innerHTML = `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-arrow-counterclockwise" viewBox="0 0 16 16">
<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.rotateCCWButtonCallback;
buttonContainer.appendChild(rotateCCW);
const rotateCW = document.createElement('button');
rotateCW.classList.add("btn", "btn-secondary");
rotateCW.innerHTML = `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-arrow-clockwise" viewBox="0 0 16 16">
<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.rotateCWButtonCallback;
buttonContainer.appendChild(rotateCW);
const deletePage = document.createElement('button');
deletePage.classList.add("btn", "btn-danger");
deletePage.innerHTML = `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-trash" viewBox="0 0 16 16">
<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.deletePageButtonCallback;
buttonContainer.appendChild(deletePage);
div.appendChild(buttonContainer);
const insertFileButtonContainer = document.createElement('div');
insertFileButtonContainer.classList.add(
"pdf-actions_insert-file-button-container",
leftDirection,
`align-center-${leftDirection}`);
const insertFileButton = document.createElement('button');
insertFileButton.classList.add("btn", "btn-primary", "pdf-actions_insert-file-button");
insertFileButton.innerHTML = `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-file-earmark-plus" viewBox="0 0 16 16">
<path d="M8 6.5a.5.5 0 0 1 .5.5v1.5H10a.5.5 0 0 1 0 1H8.5V11a.5.5 0 0 1-1 0V9.5H6a.5.5 0 0 1 0-1h1.5V7a.5.5 0 0 1 .5-.5z"/>
<path d="M14 4.5V14a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V2a2 2 0 0 1 2-2h5.5L14 4.5zm-3 0A1.5 1.5 0 0 1 9.5 3V1H4a1 1 0 0 0-1 1v12a1 1 0 0 0 1 1h8a1 1 0 0 0 1-1V4.5h-2z"/>
</svg>`;
insertFileButton.onclick = this.insertFileButtonCallback;
insertFileButtonContainer.appendChild(insertFileButton);
div.appendChild(insertFileButtonContainer);
// add this button to every element, but only show it on the last one :D
const insertFileButtonRightContainer = document.createElement('div');
insertFileButtonRightContainer.classList.add(
"pdf-actions_insert-file-button-container",
rightDirection,
`align-center-${rightDirection}`);
const insertFileButtonRight = document.createElement('button');
insertFileButtonRight.classList.add("btn", "btn-primary", "pdf-actions_insert-file-button");
insertFileButtonRight.innerHTML = `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-file-earmark-plus" viewBox="0 0 16 16">
<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"/>
insertFileButtonRight</svg>`;
insertFileButtonRight.onclick = () => addPdfs();
insertFileButtonRightContainer.appendChild(insertFileButtonRight);
div.appendChild(insertFileButtonRightContainer);
return div;
}
}
export default PdfActionsManager;

206
src/main/resources/static/js/multitool/PdfContainer.js Normal file
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class PdfContainer {
fileName;
pagesContainer;
pagesContainerWrapper;
pdfAdapters;
constructor(id, wrapperId, pdfAdapters) {
this.fileName = null;
this.pagesContainer = document.getElementById(id)
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;
this.pdfAdapters.forEach(adapter => {
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);
this.pagesContainer.removeChild(startElement);
if(!endElement) {
this.pagesContainer.append(startElement);
} else {
this.pagesContainer.insertBefore(startElement, endElement);
}
if(scrollTo) {
const { width } = startElement.getBoundingClientRect();
const vector = (endIndex !== -1 && startIndex > endIndex)
? 0-width
: width;
this.pagesContainerWrapper.scroll({
left: this.pagesContainerWrapper.scrollLeft + vector,
})
}
}
addPdfs(nextSiblingElement) {
var input = document.createElement('input');
input.type = 'file';
input.multiple = true;
input.setAttribute("accept", "application/pdf");
input.onchange = async(e) => {
const files = e.target.files;
this.fileName = files[0].name;
for (var i=0; i < files.length; i++) {
this.addPdfFile(files[i], nextSiblingElement);
}
document.querySelectorAll(".enable-on-file").forEach(element => {
element.disabled = false;
});
}
input.click();
}
rotateElement(element, deg) {
var lastTransform = element.style.rotate;
if (!lastTransform) {
lastTransform = "0";
}
const lastAngle = parseInt(lastTransform.replace(/[^\d-]/g, ''));
const newAngle = lastAngle + deg;
element.style.rotate = newAngle + "deg";
}
async addPdfFile(file, nextSiblingElement) {
const { renderer, pdfDocument } = await this.loadFile(file);
for (var i=0; i < renderer.pageCount; i++) {
const div = document.createElement('div');
div.classList.add("page-container");
var img = document.createElement('img');
img.classList.add('page-image')
const imageSrc = await renderer.renderPage(i)
img.src = imageSrc;
img.pageIdx = i;
img.rend = renderer;
img.doc = pdfDocument;
div.appendChild(img);
this.pdfAdapters.forEach((adapter) => {
adapter.adapt?.(div)
})
if (nextSiblingElement) {
this.pagesContainer.insertBefore(div, nextSiblingElement);
} else {
this.pagesContainer.appendChild(div);
}
}
}
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,
pageCount: pdf.numPages,
renderPage: async function(pageIdx) {
const page = await this.document.getPage(pageIdx+1);
const canvas = document.createElement("canvas");
// set the canvas size to the size of the page
if (page.rotate == 90 || page.rotate == 270) {
canvas.width = page.view[3];
canvas.height = page.view[2];
} else {
canvas.width = page.view[2];
canvas.height = page.view[3];
}
// render the page onto the canvas
var renderContext = {
canvasContext: canvas.getContext("2d"),
viewport: page.getViewport({ scale: 1 })
};
await page.render(renderContext).promise;
return canvas.toDataURL();
}
};
}
async toPdfLib(objectUrl) {
const existingPdfBytes = await fetch(objectUrl).then(res => res.arrayBuffer());
const pdfDoc = await PDFLib.PDFDocument.load(existingPdfBytes);
return pdfDoc;
}
rotateAll(deg) {
for (var i=0; i<this.pagesContainer.childNodes.length; i++) {
const img = this.pagesContainer.childNodes[i].querySelector("img");
if (!img) continue;
this.rotateElement(img, deg)
}
}
async exportPdf() {
const pdfDoc = await PDFLib.PDFDocument.create();
for (var i=0; i<this.pagesContainer.childNodes.length; i++) {
const img = this.pagesContainer.childNodes[i].querySelector("img");
if (!img) continue;
const pages = await pdfDoc.copyPages(img.doc, [img.pageIdx])
const page = pages[0];
const rotation = img.style.rotate;
if (rotation) {
const rotationAngle = parseInt(rotation.replace(/[^\d-]/g, ''));
page.setRotation(PDFLib.degrees(page.getRotation().angle + rotationAngle))
}
pdfDoc.addPage(page);
}
const pdfBytes = await pdfDoc.save();
const pdfBlob = new Blob([pdfBytes], { type: 'application/pdf' });
const url = URL.createObjectURL(pdfBlob);
const downloadOption = localStorage.getItem('downloadOption');
if (downloadOption === 'sameWindow') {
// Open the file in the same window
window.location.href = url;
} else if (downloadOption === 'newWindow') {
// Open the file in a new window
window.open(url, '_blank');
} else {
// Download the file
const downloadLink = document.createElement('a');
downloadLink.href = url;
downloadLink.download = this.fileName ? this.fileName : 'managed.pdf';
downloadLink.click();
}
}
}
export default PdfContainer;

35
src/main/resources/static/js/multitool/horizontalScroll.js Normal file
View File

@ -0,0 +1,35 @@
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 divToScrollHorizontally = document.getElementById(id)
function scrollLoop() {
// Scroll the div horizontally by a fraction of the accumulated scroll delta
divToScrollHorizontally.scrollLeft += scrollDelta * 0.1;
// Reduce the accumulated scroll delta by a fraction
scrollDelta *= 0.9;
// If scroll delta is still significant, continue the scroll loop
if (Math.abs(scrollDelta) > 0.1) {
requestAnimationFrame(scrollLoop);
} else {
isScrolling = false; // Reset scroll in progress flag
}
}
divToScrollHorizontally.addEventListener("wheel", function(e) {
e.preventDefault(); // prevent default mousewheel behavior
// Accumulate the horizontal scroll delta
scrollDelta -= e.deltaX || e.wheelDeltaX || -e.deltaY || -e.wheelDeltaY;
// If scroll is not already in progress, start the scroll loop
if (!isScrolling) {
isScrolling = true;
requestAnimationFrame(scrollLoop);
}
});
}
export default scrollDivHorizontally;

536
src/main/resources/templates/multi-tool.html
View File

@ -3,7 +3,6 @@
<th:block th:insert="~{fragments/common :: head(title=#{multiTool.title})}"></th:block>
<body>
<div id="image-highlighter"></div>
<div id="page-container">
@ -53,390 +52,40 @@
</div>
</div>
</div>
</div>
</div>
<div th:insert="~{fragments/footer.html :: footer}"></div>
</div>
<div id="drag-container"></div>
<script>
var fileName = null;
<script type="module">
import PdfContainer from '/js/multitool/PdfContainer.js';
import DragDropManager from "/js/multitool/DragDropManager.js";
import scrollDivHorizontally from "/js/multitool/horizontalScroll.js";
import ImageHighlighter from "/js/multitool/ImageHighlighter.js";
import PdfActionsManager from '/js/multitool/PdfActionsManager.js';
/**
*
* Manage Page container scroll
*
*/
const pagesContainer = document.getElementById("pages-container");
const pagesContainerWrapper = document.getElementById("pages-container-wrapper")
// enables drag and drop
const dragDropManager = new DragDropManager('drag-container', 'pages-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');
const pageDirection = document.documentElement.getAttribute("lang-direction");
// Scroll the wrapper horizontally
scrollDivHorizontally('pages-container-wrapper');
var scrollDelta = 0; // variable to store the accumulated scroll delta
var isScrolling = false; // variable to track if scroll is already in progress
pagesContainerWrapper.addEventListener("wheel", function(e) {
e.preventDefault(); // prevent default mousewheel behavior
// Accumulate the horizontal scroll delta
scrollDelta -= e.deltaX || e.wheelDeltaX || -e.deltaY || -e.wheelDeltaY;
// If scroll is not already in progress, start the scroll loop
if (!isScrolling) {
isScrolling = true;
requestAnimationFrame(scrollLoop);
}
});
function scrollLoop() {
// Scroll the div horizontally by a fraction of the accumulated scroll delta
pagesContainerWrapper.scrollLeft += scrollDelta * 0.1;
// Reduce the accumulated scroll delta by a fraction
scrollDelta *= 0.9;
// If scroll delta is still significant, continue the scroll loop
if (Math.abs(scrollDelta) > 0.1) {
requestAnimationFrame(scrollLoop);
} else {
isScrolling = false; // Reset scroll in progress flag
}
}
/**
*
* Manage image highlighter clearing
*
*/
const imageHighlighter = document.getElementById('image-highlighter');
imageHighlighter.onclick = () => {
imageHighlighter.childNodes.forEach((child) => {
child.classList.add('remove');
setTimeout(() => {
imageHighlighter.removeChild(child);
}, 100)
})
}
const 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
// instead of next to it.
imageClickEvent.preventDefault();
imageClickEvent.stopPropagation();
};
bigImg.src = highlightEvent.target.src;
imageHighlighter.appendChild(bigImg);
}
/**
*
* Methods for managing PDFs
*
*/
function addPdfs(nextSiblingElement) {
var input = document.createElement('input');
input.type = 'file';
input.multiple = true;
input.setAttribute("accept", "application/pdf");
input.onchange = async(e) => {
const files = e.target.files;
fileName = files[0].name;
for (var i=0; i < files.length; i++) {
addPdfFile(files[i], nextSiblingElement);
}
document.querySelectorAll(".enable-on-file").forEach(element => {
element.disabled = false;
});
}
input.click();
}
async function addPdfFile(file, nextSiblingElement) {
const { renderer, pdfDocument } = await loadFile(file);
const moveUpButtonCallback = e => {
var imgContainer = e.target;
const startingPosition = imgContainer.getBoundingClientRect();
while (!imgContainer.classList.contains("page-container")) {
imgContainer = imgContainer.parentNode;
}
const sibling = imgContainer.previousSibling;
if (sibling) {
pagesContainer.removeChild(imgContainer);
pagesContainer.insertBefore(imgContainer, sibling);
const { width } = imgContainer.getBoundingClientRect();
pagesContainerWrapper.scroll({
left: pagesContainerWrapper.scrollLeft - width,
})
}
};
const moveDownButtonCallback = e => {
var imgContainer = e.target;
while (!imgContainer.classList.contains("page-container")) {
imgContainer = imgContainer.parentNode;
}
const sibling = imgContainer.nextSibling;
if (sibling) {
pagesContainer.removeChild(imgContainer);
if (sibling.nextSibling) {
pagesContainer.insertBefore(imgContainer, sibling.nextSibling);
} else {
pagesContainer.appendChild(imgContainer)
}
const { width } = imgContainer.getBoundingClientRect();
pagesContainerWrapper.scroll({
left: pagesContainerWrapper.scrollLeft + width,
})
}
};
const rotateCCWButtonCallback = e => {
var imgContainer = e.target;
while (!imgContainer.classList.contains("page-container")) {
imgContainer = imgContainer.parentNode;
}
const img = imgContainer.querySelector("img");
rotateElement(img, -90)
};
const rotateCWButtonCallback = e => {
var imgContainer = e.target;
while (!imgContainer.classList.contains("page-container")) {
imgContainer = imgContainer.parentNode;
}
const img = imgContainer.querySelector("img");
rotateElement(img, 90)
};
const deletePageButtonCallback = e => {
var imgContainer = e.target;
while (!imgContainer.classList.contains("page-container")) {
imgContainer = imgContainer.parentNode;
}
pagesContainer.removeChild(imgContainer);
};
const insertFileButtonCallback = e => {
var imgContainer = e.target;
while (!imgContainer.classList.contains("page-container")) {
imgContainer = imgContainer.parentNode;
}
addPdfs(imgContainer)
};
for (var i=0; i < renderer.pageCount; i++) {
const div = document.createElement('div');
div.classList.add("page-container");
var img = document.createElement('img');
img.classList.add('page-image')
const imageSrc = await renderer.renderPage(i)
img.src = imageSrc;
img.pageIdx = i;
img.rend = renderer;
img.doc = pdfDocument;
div.appendChild(img);
/**
* Making pages larger when clicking on them
*/
img.addEventListener('click',imageHighlightCallback)
/**
* Rendering the various buttons to manipulate and move pdf pages
*/
const leftDirection = pageDirection === 'rtl' ? 'right' : 'left'
const rightDirection = pageDirection === 'rtl' ? 'left' : 'right'
const buttonContainer = document.createElement('div');
buttonContainer.classList.add("button-container");
const moveUp = document.createElement('button');
moveUp.classList.add("move-left-button","btn", "btn-secondary");
moveUp.innerHTML = `<i class="bi bi-arrow-${leftDirection}-short"></i>`;
moveUp.onclick = moveUpButtonCallback;
buttonContainer.appendChild(moveUp);
const moveDown = document.createElement('button');
moveDown.classList.add("move-right-button","btn", "btn-secondary");
moveDown.innerHTML = `<i class="bi bi-arrow-${rightDirection}-short"></i>`;
moveDown.onclick = moveDownButtonCallback;
buttonContainer.appendChild(moveDown);
const rotateCCW = document.createElement('button');
rotateCCW.classList.add("btn", "btn-secondary");
rotateCCW.innerHTML = `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-arrow-counterclockwise" viewBox="0 0 16 16">
<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 = rotateCCWButtonCallback;
buttonContainer.appendChild(rotateCCW);
const rotateCW = document.createElement('button');
rotateCW.classList.add("btn", "btn-secondary");
rotateCW.innerHTML = `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-arrow-clockwise" viewBox="0 0 16 16">
<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 = rotateCWButtonCallback;
buttonContainer.appendChild(rotateCW);
const deletePage = document.createElement('button');
deletePage.classList.add("btn", "btn-danger");
deletePage.innerHTML = `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-trash" viewBox="0 0 16 16">
<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 = deletePageButtonCallback;
buttonContainer.appendChild(deletePage);
div.appendChild(buttonContainer);
const insertFileButtonContainer = document.createElement('div');
insertFileButtonContainer.classList.add(
"insert-file-button-container",
leftDirection,
`align-center-${leftDirection}`);
const insertFileButton = document.createElement('button');
insertFileButton.classList.add("btn", "btn-primary", "insert-file-button");
insertFileButton.innerHTML = `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-file-earmark-plus" viewBox="0 0 16 16">
<path d="M8 6.5a.5.5 0 0 1 .5.5v1.5H10a.5.5 0 0 1 0 1H8.5V11a.5.5 0 0 1-1 0V9.5H6a.5.5 0 0 1 0-1h1.5V7a.5.5 0 0 1 .5-.5z"/>
<path d="M14 4.5V14a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V2a2 2 0 0 1 2-2h5.5L14 4.5zm-3 0A1.5 1.5 0 0 1 9.5 3V1H4a1 1 0 0 0-1 1v12a1 1 0 0 0 1 1h8a1 1 0 0 0 1-1V4.5h-2z"/>
</svg>`;
insertFileButton.onclick = insertFileButtonCallback;
insertFileButtonContainer.appendChild(insertFileButton);
div.appendChild(insertFileButtonContainer);
// add this button to every element, but only show it on the last one :D
const insertFileButtonRightContainer = document.createElement('div');
insertFileButtonRightContainer.classList.add(
"insert-file-button-container",
rightDirection,
`align-center-${rightDirection}`);
const insertFileButtonRight = document.createElement('button');
insertFileButtonRight.classList.add("btn", "btn-primary", "insert-file-button");
insertFileButtonRight.innerHTML = `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-file-earmark-plus" viewBox="0 0 16 16">
<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"/>
insertFileButtonRight</svg>`;
insertFileButtonRight.onclick = () => addPdfs();
insertFileButtonRightContainer.appendChild(insertFileButtonRight);
div.appendChild(insertFileButtonRightContainer);
if (nextSiblingElement) {
pagesContainer.insertBefore(div, nextSiblingElement);
} else {
pagesContainer.appendChild(div);
}
}
}
function rotateElement(element, deg) {
var lastTransform = element.style.rotate;
if (!lastTransform) {
lastTransform = "0";
}
const lastAngle = parseInt(lastTransform.replace(/[^\d-]/g, ''));
const newAngle = lastAngle + deg;
element.style.rotate = newAngle + "deg";
}
function rotateAll(deg) {
for (var i=0; i<pagesContainer.childNodes.length; i++) {
const img = pagesContainer.childNodes[i].querySelector("img");
if (!img) continue;
rotateElement(img, deg)
}
}
async function exportPdf() {
const pdfDoc = await PDFLib.PDFDocument.create();
for (var i=0; i<pagesContainer.childNodes.length; i++) {
const img = pagesContainer.childNodes[i].querySelector("img");
if (!img) continue;
const pages = await pdfDoc.copyPages(img.doc, [img.pageIdx])
const page = pages[0];
const rotation = img.style.rotate;
if (rotation) {
const rotationAngle = parseInt(rotation.replace(/[^\d-]/g, ''));
page.setRotation(PDFLib.degrees(page.getRotation().angle + rotationAngle))
}
pdfDoc.addPage(page);
}
const pdfBytes = await pdfDoc.save();
const pdfBlob = new Blob([pdfBytes], { type: 'application/pdf' });
const url = URL.createObjectURL(pdfBlob);
const downloadOption = localStorage.getItem('downloadOption');
if (downloadOption === 'sameWindow') {
// Open the file in the same window
window.location.href = url;
} else if (downloadOption === 'newWindow') {
// Open the file in a new window
window.open(url, '_blank');
} else {
// Download the file
const downloadLink = document.createElement('a');
downloadLink.href = url;
downloadLink.download = fileName ? fileName : 'managed.pdf';
downloadLink.click();
}
}
async function loadFile(file) {
var objectUrl = URL.createObjectURL(file);
var pdfDocument = await toPdfLib(objectUrl);
var renderer = await toRenderer(objectUrl);
return { renderer, pdfDocument };
}
async function toPdfLib(objectUrl) {
const existingPdfBytes = await fetch(objectUrl).then(res => res.arrayBuffer());
const pdfDoc = await PDFLib.PDFDocument.load(existingPdfBytes);
return pdfDoc;
}
async function toRenderer(objectUrl) {
const pdf = await pdfjsLib.getDocument(objectUrl).promise;
return {
document: pdf,
pageCount: pdf.numPages,
renderPage: async function(pageIdx) {
const page = await this.document.getPage(pageIdx+1);
const canvas = document.createElement("canvas");
// set the canvas size to the size of the page
if (page.rotate == 90 || page.rotate == 270) {
canvas.width = page.view[3];
canvas.height = page.view[2];
} else {
canvas.width = page.view[2];
canvas.height = page.view[3];
}
// render the page onto the canvas
var renderContext = {
canvasContext: canvas.getContext("2d"),
viewport: page.getViewport({ scale: 1 })
};
await page.render(renderContext).promise;
return canvas.toDataURL();
}
};
}
// Automatically exposes rotateAll, addPdfs and exportPdf to the window for the global buttons.
const pdfContainer = new PdfContainer(
'pages-container',
'pages-container-wrapper',
[
dragDropManager,
imageHighlighter,
pdfActionsManager,
]
)
</script>
<style>
@ -444,6 +93,7 @@
max-width: 95vw;
margin: 0 auto;
}
#global-buttons-container {
display: flex;
gap: 10px;
@ -525,12 +175,14 @@
text-align: center;
position: relative;
user-select: none;
transition: width 1s linear;
}
.page-container img {
max-width: calc(100% - 15px);
/* max-width: calc(100% - 15px); */
max-height: calc(100% - 15px);
max-width: 237px;
display: block;
position: absolute;
left: 50%;
@ -541,136 +193,6 @@
transition: rotate 0.3s;
}
.page-container .button-container {
z-index: 2;
display:flex;
opacity: 0;
transition: opacity 0.1s linear;
}
.page-container:hover .button-container {
opacity: 1;
}
.page-container .button-container > * {
padding: 0.25rem 0.5rem;
margin: 3px;
display: block;
}
.page-container svg {
width: 16px;
height: 16px;
}
.page-container:nth-child(1) .move-left-button {
display: none;
}
.page-container:last-child .move-right-button {
display: none;
}
.page-image {
cursor:pointer;
}
/* "insert pdf" buttons that appear on the right when hover */
.insert-file-button-container {
translate: 0 -50%;
width: 80px;
height: 100%;
z-index: 1;
opacity: 0;
transition: opacity 0.2s;
}
.insert-file-button-container.left {
left: -20px;
}
.insert-file-button-container.right {
right: -20px;
}
html[lang-direction=ltr] .insert-file-button-container.right {
display:none;
}
html[lang-direction=rtl] .insert-file-button-container.left {
display:none;
}
.insert-file-button-container.left .insert-file-button {
left: 0;
translate: 0 -50%;
}
.insert-file-button-container.right .insert-file-button {
right: 0;
translate: 0 -50%;
}
html[lang-direction=ltr] .page-container:last-child > .insert-file-button-container.right {
display: block;
}
html[lang-direction=rtl] .page-container:last-child > .insert-file-button-container.left {
display: block;
}
.insert-file-button-container:hover {
opacity: 1;
transition: opacity 0.05s;
}
.insert-file-button {
position: absolute;
top: 50%;
right: 50%;
translate: 50% -50%;
aspect-ratio: 1;
border-radius: 100px;
}
#image-highlighter {
position: fixed;
display:flex;
inset: 0;
z-index: 10000;
background-color: rgba(0, 0, 0, 0);
visibility: hidden;
align-items: center;
justify-content: center;
transition: visbility 0.1s linear, background-color 0.1s linear;
}
#image-highlighter > * {
max-width: 80vw;
max-height: 80vh;
animation: image-highlight .1s linear;
transition: transform .1s linear, opacity .1s linear;
}
#image-highlighter > *.remove {
transform: scale(0.8) !important;
opacity: 0 !important;
}
#image-highlighter:not(:empty) {
background-color: rgba(0, 0, 0, 0.37);
visibility: visible;
}
@keyframes image-highlight {
from {
transform: scale(0.8);
opacity: 0;
}
to {
transform: scale(1);
opacity: 1;
}
}
#add-pdf-button {
margin: 0 auto;
}