2023-07-16 19:57:21 +02:00
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<!DOCTYPE html>
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<html th:lang="${#locale.toString()}" th:lang-direction="#{language.direction}" xmlns:th="http://www.thymeleaf.org">
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<th:block th:insert="~{fragments/common :: head(title=#{crop.title})}"></th:block>
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<body>
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<div id="page-container">
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<div id="content-wrap">
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<div th:insert="~{fragments/navbar.html :: navbar}"></div>
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<br> <br>
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<div class="container">
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<div class="row justify-content-center">
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<div class="col-md-6">
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<h2 th:text="#{crop.header}"></h2>
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<form id="cropForm" action="/crop" method="post" enctype="multipart/form-data">
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<div th:replace="~{fragments/common :: fileSelector(name='fileInput', multiple=false, accept='application/pdf')}"></div>
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<input id="x" type="hidden" name="x">
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<input id="y" type="hidden" name="y">
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<input id="width" type="hidden" name="width">
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<input id="height" type="hidden" name="height">
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<button type="submit" class="btn btn-primary" th:text="#{crop.submit}"></button>
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</form>
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2023-07-19 23:11:59 +02:00
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<div style="position: relative; display: inline-block;">
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2023-07-22 14:17:24 +02:00
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<canvas id="crop-pdf-canvas" style="position: absolute; top: 0; left: 0; z-index: 1;"></canvas>
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2023-07-19 23:11:59 +02:00
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<canvas id="overlayCanvas" style="position: absolute; top: 0; left: 0; z-index: 2;"></canvas>
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</div>
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2023-07-16 19:57:21 +02:00
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<script>
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2023-07-22 14:17:24 +02:00
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let pdfCanvas = document.getElementById('crop-pdf-canvas');
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2023-07-19 23:11:59 +02:00
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let overlayCanvas = document.getElementById('overlayCanvas');
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2023-07-16 19:57:21 +02:00
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2023-07-19 23:11:59 +02:00
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let context = pdfCanvas.getContext('2d');
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let overlayContext = overlayCanvas.getContext('2d');
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overlayCanvas.width = pdfCanvas.width;
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overlayCanvas.height = pdfCanvas.height;
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let isDrawing = false; // New flag to check if drawing is ongoing
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2023-07-16 19:57:21 +02:00
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let cropForm = document.getElementById('cropForm');
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let fileInput = document.getElementById('fileInput-input');
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let xInput = document.getElementById('x');
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let yInput = document.getElementById('y');
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let widthInput = document.getElementById('width');
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let heightInput = document.getElementById('height');
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let pdfDoc = null;
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let currentPage = 1;
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let totalPages = 0;
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let startX = 0;
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let startY = 0;
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let rectWidth = 0;
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let rectHeight = 0;
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fileInput.addEventListener('change', function(e) {
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let file = e.target.files[0];
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if (file.type === 'application/pdf') {
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let reader = new FileReader();
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reader.onload = function(ev) {
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let typedArray = new Uint8Array(reader.result);
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2023-07-22 14:17:24 +02:00
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pdfjsLib.GlobalWorkerOptions.workerSrc = 'pdfjs/pdf.worker.js'
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2023-07-16 19:57:21 +02:00
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pdfjsLib.getDocument(typedArray).promise.then(function(pdf) {
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pdfDoc = pdf;
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totalPages = pdf.numPages;
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renderPage(currentPage);
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});
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};
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reader.readAsArrayBuffer(file);
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}
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});
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2023-07-19 23:11:59 +02:00
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overlayCanvas.addEventListener('mousedown', function(e) {
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// Clear previously drawn rectangle on the main canvas
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context.clearRect(0, 0, pdfCanvas.width, pdfCanvas.height);
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renderPage(currentPage); // Re-render the PDF
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// Clear the overlay canvas to ensure old drawings are removed
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overlayContext.clearRect(0, 0, overlayCanvas.width, overlayCanvas.height);
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startX = e.offsetX;
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startY = e.offsetY;
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isDrawing = true;
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2023-07-16 19:57:21 +02:00
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});
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2023-07-19 23:11:59 +02:00
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overlayCanvas.addEventListener('mousemove', function(e) {
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if (!isDrawing) return;
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overlayContext.clearRect(0, 0, overlayCanvas.width, overlayCanvas.height); // Clear previous rectangle
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rectWidth = e.offsetX - startX;
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rectHeight = e.offsetY - startY;
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overlayContext.strokeStyle = 'red';
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overlayContext.strokeRect(startX, startY, rectWidth, rectHeight);
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});
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2023-07-16 19:57:21 +02:00
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2023-07-19 23:11:59 +02:00
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overlayCanvas.addEventListener('mouseup', function(e) {
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isDrawing = false;
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rectWidth = e.offsetX - startX;
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rectHeight = e.offsetY - startY;
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2023-07-16 19:57:21 +02:00
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2023-07-19 23:11:59 +02:00
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let flippedY = pdfCanvas.height - e.offsetY;
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2023-07-16 19:57:21 +02:00
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2023-07-19 23:11:59 +02:00
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xInput.value = startX;
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yInput.value = flippedY;
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widthInput.value = rectWidth;
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heightInput.value = rectHeight;
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// Draw the final rectangle on the main canvas
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context.strokeStyle = 'red';
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context.strokeRect(startX, startY, rectWidth, rectHeight);
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overlayContext.clearRect(0, 0, overlayCanvas.width, overlayCanvas.height); // Clear the overlay
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});
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2023-07-16 19:57:21 +02:00
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function renderPage(pageNumber) {
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2023-07-19 23:11:59 +02:00
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pdfDoc.getPage(pageNumber).then(function(page) {
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let viewport = page.getViewport({ scale: 1.0 });
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pdfCanvas.width = viewport.width;
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pdfCanvas.height = viewport.height;
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overlayCanvas.width = viewport.width; // Match overlay canvas size with PDF canvas
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overlayCanvas.height = viewport.height;
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let renderContext = { canvasContext: context, viewport: viewport };
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page.render(renderContext);
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2023-07-22 14:17:24 +02:00
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pdfCanvas.classList.add("shadow-canvas");
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2023-07-19 23:11:59 +02:00
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});
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2023-07-16 19:57:21 +02:00
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}
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2023-07-19 23:11:59 +02:00
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2023-07-16 19:57:21 +02:00
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</script>
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</div>
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</div>
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</div>
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</div>
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<div th:insert="~{fragments/footer.html :: footer}"></div>
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</div>
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</body>
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</html>
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