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duplex
This commit is contained in:
Anthony Stirling
parent
8a2aa44de8
commit
8bbbdbd359
@ -1,6 +1,7 @@
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package stirling.software.SPDF.controller.api;
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import java.io.IOException;
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import io.swagger.v3.oas.annotations.media.Schema;
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import java.util.ArrayList;
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import java.util.List;
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@ -79,26 +80,148 @@ public class RearrangePagesPDFController {
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return newPageOrder;
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}
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private enum CustomMode {
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REVERSE_ORDER,
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DUPLEX_SORT,
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BOOKLET_SORT,
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ODD_EVEN_SPLIT,
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REMOVE_FIRST,
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REMOVE_LAST,
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REMOVE_FIRST_AND_LAST,
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}
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private List<Integer> removeFirst(int totalPages) {
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if (totalPages <= 1) return new ArrayList<>();
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List<Integer> newPageOrder = new ArrayList<>();
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for (int i = 2; i <= totalPages; i++) {
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newPageOrder.add(i - 1);
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}
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return newPageOrder;
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}
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private List<Integer> removeLast(int totalPages) {
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if (totalPages <= 1) return new ArrayList<>();
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List<Integer> newPageOrder = new ArrayList<>();
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for (int i = 1; i < totalPages; i++) {
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newPageOrder.add(i - 1);
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}
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return newPageOrder;
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}
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private List<Integer> removeFirstAndLast(int totalPages) {
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if (totalPages <= 2) return new ArrayList<>();
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List<Integer> newPageOrder = new ArrayList<>();
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for (int i = 2; i < totalPages; i++) {
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newPageOrder.add(i - 1);
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}
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return newPageOrder;
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}
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private List<Integer> reverseOrder(int totalPages) {
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List<Integer> newPageOrder = new ArrayList<>();
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for (int i = totalPages; i >= 1; i--) {
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newPageOrder.add(i - 1);
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}
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return newPageOrder;
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}
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private List<Integer> duplexSort(int totalPages) {
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List<Integer> newPageOrder = new ArrayList<>();
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int half = (totalPages + 1) / 2; // This ensures proper behavior with odd numbers of pages
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for (int i = 1; i <= half; i++) {
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newPageOrder.add(i - 1);
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if (i <= totalPages - half) { // Avoid going out of bounds
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newPageOrder.add(totalPages - i);
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}
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}
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return newPageOrder;
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}
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private List<Integer> bookletSort(int totalPages) {
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List<Integer> newPageOrder = new ArrayList<>();
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for (int i = 0; i < totalPages / 2; i++) {
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newPageOrder.add(i);
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newPageOrder.add(totalPages - i - 1);
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}
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return newPageOrder;
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}
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private List<Integer> oddEvenSplit(int totalPages) {
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List<Integer> newPageOrder = new ArrayList<>();
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for (int i = 1; i <= totalPages; i += 2) {
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newPageOrder.add(i - 1);
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}
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for (int i = 2; i <= totalPages; i += 2) {
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newPageOrder.add(i - 1);
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}
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return newPageOrder;
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}
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private List<Integer> processCustomMode(String customMode, int totalPages) {
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try {
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CustomMode mode = CustomMode.valueOf(customMode.toUpperCase());
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switch (mode) {
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case REVERSE_ORDER:
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return reverseOrder(totalPages);
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case DUPLEX_SORT:
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return duplexSort(totalPages);
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case BOOKLET_SORT:
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return bookletSort(totalPages);
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case ODD_EVEN_SPLIT:
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return oddEvenSplit(totalPages);
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case REMOVE_FIRST:
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return removeFirst(totalPages);
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case REMOVE_LAST:
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return removeLast(totalPages);
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case REMOVE_FIRST_AND_LAST:
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return removeFirstAndLast(totalPages);
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default:
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throw new IllegalArgumentException("Unsupported custom mode");
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}
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} catch (IllegalArgumentException e) {
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logger.error("Unsupported custom mode", e);
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return null;
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}
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}
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@PostMapping(consumes = "multipart/form-data", value = "/rearrange-pages")
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@Operation(summary = "Rearrange pages in a PDF file",
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description = "This endpoint rearranges pages in a given PDF file based on the specified page order. Users can provide a page order as a comma-separated list of page numbers or page ranges.")
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description = "This endpoint rearranges pages in a given PDF file based on the specified page order or custom mode. Users can provide a page order as a comma-separated list of page numbers or page ranges, or a custom mode.")
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public ResponseEntity<byte[]> rearrangePages(
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@RequestPart(required = true, value = "fileInput")
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@Parameter(description = "The input PDF file to rearrange pages")
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MultipartFile pdfFile,
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@RequestParam("pageOrder")
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@RequestParam(required = false, value = "pageOrder")
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@Parameter(description = "The new page order as a comma-separated list of page numbers or page ranges (e.g., '1,3,5-7')")
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String pageOrder) {
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String pageOrder,
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@RequestParam(required = false, value = "customMode")
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@Parameter(schema = @Schema(implementation = CustomMode.class, description = "The custom mode for page rearrangement. " +
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"Valid values are:\n" +
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"REVERSE_ORDER: Reverses the order of all pages.\n" +
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"DUPLEX_SORT: Sorts pages as if all fronts were scanned then all backs in reverse (1, n, 2, n-1, ...). " +
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"BOOKLET_SORT: Arranges pages for booklet printing (last, first, second, second last, ...).\n" +
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"ODD_EVEN_SPLIT: Splits and arranges pages into odd and even numbered pages.\n" +
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"REMOVE_FIRST: Removes the first page.\n" +
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"REMOVE_LAST: Removes the last page.\n" +
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"REMOVE_FIRST_AND_LAST: Removes both the first and the last pages.\n"))
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String customMode) {
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try {
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// Load the input PDF
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PDDocument document = PDDocument.load(pdfFile.getInputStream());
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// Split the page order string into an array of page numbers or range of numbers
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String[] pageOrderArr = pageOrder.split(",");
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// int[] newPageOrder = new int[pageOrderArr.length];
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String[] pageOrderArr = pageOrder != null ? pageOrder.split(",") : new String[0];
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int totalPages = document.getNumberOfPages();
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List<Integer> newPageOrder = pageOrderToString(pageOrderArr, totalPages);
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System.out.println("pageOrder=" + pageOrder);
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System.out.println("customMode length =" + customMode.length());
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List<Integer> newPageOrder;
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if(customMode != null && customMode.length() > 0) {
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newPageOrder = processCustomMode(customMode, totalPages);
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} else {
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newPageOrder = pageOrderToString(pageOrderArr, totalPages);
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}
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// Create a new list to hold the pages in the new order
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List<PDPage> newPages = new ArrayList<>();
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@ -118,10 +241,10 @@ public class RearrangePagesPDFController {
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return PdfUtils.pdfDocToWebResponse(document, pdfFile.getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_rearranged.pdf");
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} catch (IOException e) {
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logger.error("Failed rearranging documents", e);
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return null;
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}
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}
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}
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@ -10,7 +10,7 @@ multiPdfDropPrompt=Select (or drag & drop) all PDFs you require
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imgPrompt=Select Image(s)
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genericSubmit=Submit
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processTimeWarning=Warning: This process can take up to a minute depending on file-size
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pageOrderPrompt=Page Order (Enter a comma-separated list of page numbers) :
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pageOrderPrompt=Custom Page Order (Enter a comma-separated list of page numbers) :
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goToPage=Go
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true=True
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false=False
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@ -16,13 +16,36 @@
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<form th:action="@{rearrange-pages}" 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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<div class="form-group">
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<label for="customMode">Mode</label>
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<select class="form-control" id="customMode" name="customMode">
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<option value="">Custom Page Order</option>
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<option value="REVERSE_ORDER">Reverse Order</option>
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<option value="DUPLEX_SORT">Duplex Sort</option>
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<option value="BOOKLET_SORT">Booklet Sort</option>
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<option value="ODD_EVEN_SPLIT">Odd-Even Split</option>
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<option value="REMOVE_FIRST">Remove First</option>
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<option value="REMOVE_LAST">Remove Last</option>
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<option value="REMOVE_FIRST_AND_LAST">Remove First and Last</option>
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</select>
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</div>
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<div class="form-group">
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<label for="pageOrder" th:text="#{pageOrderPrompt}"></label>
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<input type="text" class="form-control" id="fileInput" name="pageOrder" placeholder="(e.g. 1,3,2 or 4-8,2,10-12)" required>
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<input type="text" class="form-control" id="pageOrder" name="pageOrder" placeholder="(e.g. 1,3,2 or 4-8,2,10-12)" required>
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</div>
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<button type="submit" id="submitBtn" class="btn btn-primary" th:text="#{pdfOrganiser.submit}"></button>
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</form>
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<script>
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document.getElementById('customMode').addEventListener('change', function () {
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var pageOrderInput = document.getElementById('pageOrder');
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if (this.value === "") {
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pageOrderInput.disabled = false;
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} else {
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pageOrderInput.disabled = true;
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}
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});
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</script>
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</div>
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</div>
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</div>
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