2023-01-29 18:06:53 +01:00
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<!DOCTYPE html>
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<html lang="en" xmlns:th="http://www.thymeleaf.org">
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2023-02-03 21:26:35 +01:00
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<th:block th:insert="~{fragments/common :: head(title='Rotate')}"></th:block>
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<body> <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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2023-01-29 18:06:53 +01:00
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<br>
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<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>Rotate PDF</h2>
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2023-02-05 00:45:33 +01:00
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<form action="#" th:action="@{rotate-pdf}" th:object="${rotateForm}" method="post" enctype="multipart/form-data">
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<div th:replace="fragments/common :: fileSelector(name='fileInput', multiple=false)"></div>
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<input type="hidden" id="angleInput" name="angle" value="0">
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2023-01-29 18:06:53 +01:00
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2023-02-05 00:45:33 +01:00
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<div class="previewContainer">
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<img id="pdf-preview"/>
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2023-01-29 18:06:53 +01:00
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</div>
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2023-02-03 21:26:35 +01:00
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2023-02-05 00:45:33 +01:00
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<div class="buttonContainer">
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<button type="button" class="btn btn-secondary" onclick="rotate(-90)">L</button>
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<button type="submit" class="btn btn-primary">Complete</button>
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<button type="button" class="btn btn-secondary" onclick="rotate(90)">R</button>
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</div>
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2023-01-29 18:06:53 +01:00
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</form>
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</div>
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</div>
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</div>
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2023-02-03 21:26:35 +01:00
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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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2023-02-05 00:45:33 +01:00
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<script>
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const angleInput = document.getElementById("angleInput");
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const fileInput = document.getElementById("fileInput-input");
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const preview = document.getElementById("pdf-preview");
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fileInput.addEventListener("change", async function() {
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console.log("loading pdf");
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preview.parentElement.style.display = "block";
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document.querySelector(".buttonContainer").style.display = "flex";
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var file = fileInput.files[0];
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var url = URL.createObjectURL(file)
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var loadingTask = pdfjsLib.getDocument(url);
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const pdf = await loadingTask.promise;
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const page = await pdf.getPage(1);
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const canvas = document.createElement("canvas");
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// set the canvas size to the size of the page
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canvas.width = page.view[2];
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canvas.height = page.view[3];
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// render the page onto the canvas
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var renderContext = {
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canvasContext: canvas.getContext("2d"),
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viewport: page.getViewport({ scale: 1 })
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};
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await page.render(renderContext).promise;
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preview.src = canvas.toDataURL();
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});
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function rotate(deg) {
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var lastTransform = preview.style.transform;
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if (!lastTransform) {
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lastTransform = "0";
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}
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const lastAngle = parseInt(lastTransform.replace(/[^\d-]/g, ''));
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const newAngle = lastAngle + deg;
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preview.style.transform = "rotate(" + newAngle + "deg)";
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angleInput.value = newAngle;
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}
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</script>
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<style>
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#pdf-preview {
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margin: 0 auto;
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display: block;
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max-width: 100%;
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max-height: 100%;
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box-shadow: 0 0 4px rgba(100,100,100,.25);
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transition: transform .3s;
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}
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.previewContainer {
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aspect-ratio: 1;
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width: 100%;
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border: 1px solid rgba(0,0,0,.125);
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border-radius: 0.25rem;
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margin: 1rem 0 0;
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padding: 15px;
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display: none;
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overflow: hidden;
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}
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.buttonContainer {
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display: none;
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justify-content: space-around;
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}
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button {
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top-margin: -100%;
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}
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</style>
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2023-01-29 18:06:53 +01:00
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</body>
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</html>
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