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Merge pull request #34 from Sf298/addGraphicsToRotatePage

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Add graphics to rotate page
This commit is contained in:
Anthony Stirling 2023-02-05 21:28:57 +00:00 committed by GitHub
commit 4c88c1bc54
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 126 additions and 19 deletions
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4
src/main/java/stirling/software/SPDF/controller/RotationController.java
View file

@ -37,7 +37,7 @@ public class RotationController {
@PostMapping("/rotate-pdf")
public ResponseEntity<byte[]> rotatePDF(@RequestParam("fileInput") MultipartFile pdfFile,
@RequestParam("angle") String angle) throws IOException {
@RequestParam("angle") Integer angle) throws IOException {
// Load the PDF document
PDDocument document = PDDocument.load(pdfFile.getBytes());
@ -50,7 +50,7 @@ public class RotationController {
while (iterPage.hasNext()) {
PDPage page = iterPage.next();
page.setRotation(Integer.valueOf(angle));
page.setRotation(page.getRotation() + angle);
}
return PdfUtils.pdfDocToWebResponse(document, pdfFile.getName() + "_rotated.pdf");

24
src/main/resources/templates/fragments/common.html
View file

@ -6,6 +6,9 @@
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script src="https://cdn.jsdelivr.net/npm/pdfjs-dist@3.3.122/build/pdf.min.js"></script>
<link href="https://cdn.jsdelivr.net/npm/pdfjs-dist@3.3.122/web/pdf_viewer.min.css" rel="stylesheet">
<link rel="stylesheet" th:href="@{dark-mode.css}" id="dark-mode-styles">
<script>
function toggleDarkMode() {
@ -93,4 +96,25 @@
};
}
</script>
</th:block>
<th:block th:fragment="fileSelector(name, multiple)">
<div class="custom-file-chooser">
<div class="custom-file">
<input type="file" class="custom-file-input" th:name="${name}" th:id="${name}+'-input'" th:multiple="${multiple}">
<label class="custom-file-label" th:for="${name}+'-input'" th:text="#{pdfPrompt}"></label>
</div>
</div>
<script th:inline="javascript">
$([[${"#"+name+"-input"}]]).on("change", function() {
const files = $(this).get(0).files;
const fileNames = Array.from(files).map(f => f.name).join(", ");
if (fileNames) {
$(this).siblings(".custom-file-label").addClass("selected").html(fileNames);
} else {
$(this).siblings(".custom-file-label").addClass("selected").html([[#{pdfPrompt}]]);
}
});
</script>
</th:block>

117
src/main/resources/templates/rotate-pdf.html
View file

@ -15,27 +15,32 @@
<div class="col-md-6">
<h2 th:text="#{rotate.header}"></h2>
<form action="#" th:action="@{rotate-pdf}" th:object="${rotateForm}" method="post" enctype="multipart/form-data">
<div th:replace="fragments/common :: fileSelector(name='fileInput', multiple=false)"></div>
<input type="hidden" id="angleInput" name="angle" value="0">
<div id="editSection" style="display: none">
<div class="previewContainer">
<img id="pdf-preview"/>
</div>
<form action="#" th:action="@{rotate-pdf}" th:object="${rotateForm}"
method="post" enctype="multipart/form-data">
<div class="custom-file">
<input type="file" class="custom-file-input" id="fileInput"
name="fileInput" required> <label
class="custom-file-label" for="fileInput" th:text="#{pdfPrompt}"></label>
<div class="buttonContainer">
<button type="button" class="btn btn-secondary" onclick="rotate(-90)">
<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>
</button>
<button type="submit" class="btn btn-primary" th:text="#{rotate.submit}"></button>
<button type="button" class="btn btn-secondary" onclick="rotate(90)">
<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>
</button>
</div>
</div>
<label for="angle" th:text="#{rotate.selectAngle}"></label> <select id="angle" class="form-control" name="angle">
<option value="90">90</option>
<option value="180">180</option>
<option value="270">270</option>
<option value="-90">-90</option>
<option value="-180">-180</option>
<option value="-270">-270</option>
</select> <br>
<button type="submit" class="btn btn-primary" th:text="#{rotate.submit}"></button>
</form>
<th:block th:insert="~{fragments/common :: filelist}"></th:block>
</div>
</div>
@ -43,6 +48,84 @@
</div>
<div th:insert="~{fragments/footer.html :: footer}"></div>
</div>
<script>
const angleInput = document.getElementById("angleInput");
const fileInput = document.getElementById("fileInput-input");
const preview = document.getElementById("pdf-preview");
fileInput.addEventListener("change", async function() {
console.log("loading pdf");
document.querySelector("#editSection").style.display = "";
var url = URL.createObjectURL(fileInput.files[0])
const pdf = await pdfjsLib.getDocument(url).promise;
const page = await pdf.getPage(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;
preview.src = canvas.toDataURL();
});
function rotate(deg) {
var lastTransform = preview.style.rotate;
if (!lastTransform) {
lastTransform = "0";
}
const lastAngle = parseInt(lastTransform.replace(/[^\d-]/g, ''));
const newAngle = lastAngle + deg;
preview.style.rotate = newAngle + "deg";
angleInput.value = newAngle;
}
</script>
<style>
#pdf-preview {
margin: 0 auto;
display: block;
max-width: calc(100% - 30px);
max-height: calc(100% - 30px);
box-shadow: 0 0 4px rgba(100,100,100,.25);
transition: rotate .3s;
position: absolute;
top: 50%;
left: 50%;
translate: -50% -50%;
}
.previewContainer {
aspect-ratio: 1;
width: 100%;
border: 1px solid rgba(0,0,0,.125);
border-radius: 0.25rem;
margin: 1rem 0;
padding: 15px;
display: block;
overflow: hidden;
position: relative;
}
.buttonContainer {
display: flex;
justify-content: space-around;
}
</style>
</body>
</html>