优化：导出幻灯片为PDF
This commit is contained in:
liujing133
@@ -1,17 +1,28 @@
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package dev.bytevibe.hyperpoint;
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import javafx.scene.image.WritableImage;
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import javafx.scene.image.PixelReader;
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import javafx.scene.layout.Pane;
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import com.itextpdf.text.*;
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import com.itextpdf.text.pdf.PdfWriter;
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import javax.imageio.ImageIO;
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import java.awt.Color;
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import java.awt.image.BufferedImage;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import javax.imageio.ImageIO;
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import com.itextpdf.text.BaseColor;
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import com.itextpdf.text.Document;
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import com.itextpdf.text.DocumentException;
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import com.itextpdf.text.Font;
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import com.itextpdf.text.Image;
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import com.itextpdf.text.Paragraph;
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import com.itextpdf.text.RectangleReadOnly;
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import com.itextpdf.text.pdf.BaseFont;
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import com.itextpdf.text.pdf.PdfContentByte;
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import com.itextpdf.text.pdf.PdfWriter;
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import javafx.scene.image.PixelReader;
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import javafx.scene.image.WritableImage;
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import javafx.scene.layout.Pane;
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/**
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* 导出工具类，用于导出页面为图片和导出幻灯片为PDF
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*/
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@@ -85,124 +96,299 @@ public class ExportUtil {
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* @throws Exception 如果导出失败
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*/
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public static void exportSlideToPDF(Slide slide, File file) throws Exception {
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// 检查文件是否已存在且被占用
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if (file.exists()) {
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try (FileOutputStream fos = new FileOutputStream(file, false)) {
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} catch (IOException e) {
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throw new IOException("文件已被占用，请关闭该文件后重试：\n" + file.getAbsolutePath(), e);
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}
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}
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if (slide == null || slide.getPages().isEmpty()) {
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throw new IOException("幻灯片没有页面");
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}
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// 创建PDF文档
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Document document = new Document(PageSize.A4);
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PdfWriter.getInstance(document, new FileOutputStream(file));
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document.open();
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try (FileOutputStream fos = new FileOutputStream(file)) {
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// 创建PDF文档，使用与编辑界面相同的宽高比
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Document document = new Document(new RectangleReadOnly(
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(float)DrawingCanvas.PAGE_WIDTH,
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(float)DrawingCanvas.PAGE_HEIGHT
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));
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PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(file));
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document.open();
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PdfContentByte canvas = writer.getDirectContent();
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// 为每一页添加内容
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for (SlidePage page : slide.getPages()) {
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// 添加页面标题
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Paragraph title = new Paragraph(page.getTitle(), new com.itextpdf.text.Font(
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com.itextpdf.text.Font.FontFamily.HELVETICA, 16, com.itextpdf.text.Font.BOLD));
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title.setSpacingAfter(10);
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document.add(title);
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// 为每一页添加内容
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for (SlidePage page : slide.getPages()) {
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// 添加页面标题
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Paragraph title = new Paragraph(page.getTitle(), new Font(
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Font.FontFamily.HELVETICA, 16, Font.BOLD));
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title.setSpacingAfter(10);
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document.add(title);
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// 添加页面内容（如果有的话）
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if (page.getContent() != null && !page.getContent().isEmpty()) {
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Paragraph content = new Paragraph(page.getContent(), new com.itextpdf.text.Font(
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com.itextpdf.text.Font.FontFamily.HELVETICA, 12));
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content.setSpacingAfter(10);
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document.add(content);
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// 添加页面内容对象
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addObjectsToDocumentWithPosition(document, canvas, page.getPageContent());
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document.newPage();
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}
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// 添加对象列表
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addObjectsToDocument(document, page.getPageContent());
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// 每页之间添加分页符
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document.newPage();
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document.close();
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writer.close();
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}
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document.close();
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}
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/**
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* 将页面内容的对象添加到PDF文档
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* 按位置添加对象到PDF文档
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*/
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private static void addObjectsToDocument(Document document, PageContent pageContent) throws DocumentException {
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private static void addObjectsToDocumentWithPosition(Document document, PdfContentByte canvas, PageContent pageContent) throws DocumentException {
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float margin = 50;
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float pdfWidth = (float)(document.getPageSize().getWidth() - 2 * margin);
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float pdfHeight = (float)(document.getPageSize().getHeight() - 2 * margin);
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float scaleX = pdfWidth / (float)DrawingCanvas.PAGE_WIDTH;
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float scaleY = pdfHeight / (float)DrawingCanvas.PAGE_HEIGHT;
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float scale = Math.min(scaleX, scaleY);
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for (DrawableObject obj : pageContent.getDrawableObjects()) {
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float x = margin + (float)obj.getX() * scale;
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float y = margin + (float)(DrawingCanvas.PAGE_HEIGHT - obj.getY() - obj.getHeight()) * scale;
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float width = (float)obj.getWidth() * scale;
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float height = (float)obj.getHeight() * scale;
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if (obj instanceof TextObject) {
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addTextObjectToDocument(document, (TextObject) obj);
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addTextObjectWithPosition(canvas, (TextObject)obj, x, y, width, height);
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} else if (obj instanceof ShapeObject) {
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addShapeObjectToDocument(document, (ShapeObject) obj);
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addShapeObjectWithPosition(canvas, (ShapeObject)obj, x, y, width, height);
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} else if (obj instanceof ImageObject) {
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addImageObjectToDocument(document, (ImageObject) obj);
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addImageObjectWithPosition(document, canvas, (ImageObject)obj, x, y, width, height);
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}
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}
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}
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/**
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* 添加文本对象到PDF
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* 按位置添加文本对象
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*/
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private static void addTextObjectToDocument(Document document, TextObject textObj) throws DocumentException {
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float fontSize = (float) textObj.getFontSize();
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int fontStyle = com.itextpdf.text.Font.NORMAL;
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if (textObj.getFontStyle().contains("BOLD")) {
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fontStyle |= com.itextpdf.text.Font.BOLD;
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private static void addTextObjectWithPosition(PdfContentByte canvas, TextObject textObj, float x, float y, float width, float height) {
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try {
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// 处理字体
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BaseFont baseFont;
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String fontFamily = textObj.getFontFamily();
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if (fontFamily.contains("Times")) {
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baseFont = BaseFont.createFont(BaseFont.TIMES_ROMAN, BaseFont.WINANSI, BaseFont.NOT_EMBEDDED);
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} else if (fontFamily.contains("Courier")) {
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baseFont = BaseFont.createFont(BaseFont.COURIER, BaseFont.WINANSI, BaseFont.NOT_EMBEDDED);
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} else if (fontFamily.contains("Georgia")) {
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baseFont = BaseFont.createFont(BaseFont.TIMES_ROMAN, BaseFont.WINANSI, BaseFont.NOT_EMBEDDED);
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} else if (fontFamily.contains("Verdana")) {
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baseFont = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.NOT_EMBEDDED);
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} else {
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baseFont = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.NOT_EMBEDDED);
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}
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// 处理字体样式（粗体/斜体）
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int style = Font.NORMAL;
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String fontStyle = textObj.getFontStyle();
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if (fontStyle.contains("BOLD")) style |= Font.BOLD;
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if (fontStyle.contains("ITALIC")) style |= Font.ITALIC;
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// 处理文本颜色
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BaseColor textColor = BaseColor.BLACK;
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if (textObj.getTextColor() != null && !textObj.getTextColor().isEmpty()) {
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Color fxColor = Color.decode("#" + textObj.getTextColor());
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textColor = new BaseColor(fxColor.getRed(), fxColor.getGreen(), fxColor.getBlue());
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}
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// 处理旋转
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double rotation = textObj.getRotation();
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if (rotation != 0) {
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canvas.saveState();
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canvas.concatCTM(
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(float) Math.cos(Math.toRadians(rotation)),
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(float) Math.sin(Math.toRadians(rotation)),
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(float) -Math.sin(Math.toRadians(rotation)),
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(float) Math.cos(Math.toRadians(rotation)),
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x, y
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);
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x = 0;
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y = 0;
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canvas.beginText();
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canvas.setFontAndSize(baseFont, (float) textObj.getFontSize());
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canvas.setColorFill(textColor);
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canvas.setTextMatrix(x, y + (float) textObj.getFontSize());
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canvas.showText(textObj.getText());
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canvas.endText();
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canvas.restoreState();
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} else {
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canvas.beginText();
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canvas.setFontAndSize(baseFont, (float) textObj.getFontSize());
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canvas.setColorFill(textColor);
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canvas.setTextMatrix(x, y + (float) textObj.getFontSize());
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canvas.showText(textObj.getText());
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canvas.endText();
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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if (textObj.getFontStyle().contains("ITALIC")) {
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fontStyle |= com.itextpdf.text.Font.ITALIC;
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}
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com.itextpdf.text.Font font = new com.itextpdf.text.Font(
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com.itextpdf.text.Font.FontFamily.HELVETICA, fontSize, fontStyle);
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Paragraph paragraph = new Paragraph(textObj.getText(), font);
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paragraph.setSpacingAfter(5);
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document.add(paragraph);
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}
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/**
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* 添加形状对象到PDF
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* 按位置添加形状对象
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*/
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private static void addShapeObjectToDocument(Document document, ShapeObject shapeObj) throws DocumentException {
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String shapeInfo = "图形: " + shapeObj.getShapeType().name() +
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" (位置: " + (int)shapeObj.getX() + ", " + (int)shapeObj.getY() +
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" 大小: " + (int)shapeObj.getWidth() + "x" + (int)shapeObj.getHeight() + ")";
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Paragraph paragraph = new Paragraph(shapeInfo, new com.itextpdf.text.Font(
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com.itextpdf.text.Font.FontFamily.HELVETICA, 10));
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paragraph.setSpacingAfter(5);
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document.add(paragraph);
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}
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/**
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* 添加图片对象到PDF
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*/
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private static void addImageObjectToDocument(Document document, ImageObject imageObj) throws DocumentException {
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String imagePath = imageObj.getImagePath();
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if (imagePath != null && !imagePath.isEmpty()) {
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try {
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// 检查文件是否存在
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File imageFile = new File(imagePath);
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if (imageFile.exists()) {
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Image img = Image.getInstance(imagePath);
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// 限制图片大小
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float maxWidth = document.getPageSize().getWidth() - 40;
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float maxHeight = document.getPageSize().getHeight() / 3;
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if (img.getWidth() > maxWidth) {
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img.scaleToFit(maxWidth, maxHeight);
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private static void addShapeObjectWithPosition(PdfContentByte canvas, ShapeObject shapeObj, float x, float y, float width, float height) {
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try {
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canvas.saveState();
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// 设置线条和填充颜色
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if (shapeObj.getStrokeColor() != null) {
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Color strokeColor = Color.decode("#" + shapeObj.getStrokeColor());
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canvas.setColorStroke(new BaseColor(strokeColor.getRed(), strokeColor.getGreen(), strokeColor.getBlue()));
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}
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if (shapeObj.getFillColor() != null && !shapeObj.getFillColor().isEmpty()) {
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Color fillColor = Color.decode("#" + shapeObj.getFillColor());
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canvas.setColorFill(new BaseColor(fillColor.getRed(), fillColor.getGreen(), fillColor.getBlue()));
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}
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canvas.setLineWidth((float)shapeObj.getStrokeWidth());
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// 处理旋转
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double rotation = shapeObj.getRotation();
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if (rotation != 0) {
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canvas.saveState();
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float centerX = x + width / 2f;
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float centerY = y + height / 2f;
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canvas.concatCTM(
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(float) Math.cos(Math.toRadians(rotation)),
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(float) Math.sin(Math.toRadians(rotation)),
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(float) -Math.sin(Math.toRadians(rotation)),
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(float) Math.cos(Math.toRadians(rotation)),
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centerX - centerX * (float) Math.cos(Math.toRadians(rotation)) + centerY * (float) Math.sin(Math.toRadians(rotation)),
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centerY - centerX * (float) Math.sin(Math.toRadians(rotation)) - centerY * (float) Math.cos(Math.toRadians(rotation))
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);
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switch (shapeObj.getShapeType()) {
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case LINE:
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canvas.moveTo(x, y + height);
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canvas.lineTo(x + width, y);
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canvas.stroke();
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break;
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case RECTANGLE:
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canvas.rectangle(x, y, width, height);
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if (shapeObj.getFillColor() != null && !shapeObj.getFillColor().isEmpty()) {
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canvas.fillStroke();
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} else {
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canvas.stroke();
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}
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img.setSpacingAfter(10);
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document.add(img);
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} else {
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Paragraph para = new Paragraph("[图片不存在: " + imagePath + "]",
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new com.itextpdf.text.Font(com.itextpdf.text.Font.FontFamily.HELVETICA, 10));
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para.setSpacingAfter(5);
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document.add(para);
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break;
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case CIRCLE:
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float radius = Math.min(width, height) / 2f;
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centerX = x + radius;
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centerY = y + radius;
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canvas.ellipse(centerX + radius, centerY + radius, centerX - radius, centerY - radius); // 宽高相等才是正圆
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if (shapeObj.getFillColor() != null && !shapeObj.getFillColor().isEmpty()) {
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canvas.fillStroke();
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} else {
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canvas.stroke();
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}
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break;
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case ELLIPSE:
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float ellipseRadiusX = width / 2f;
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float ellipseRadiusY = height / 2f;
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float ellipseCenterX = x + ellipseRadiusX;
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float ellipseCenterY = y + ellipseRadiusY;
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canvas.ellipse(ellipseCenterX + ellipseRadiusX, ellipseCenterY + ellipseRadiusY, ellipseCenterX - ellipseRadiusX, ellipseCenterY - ellipseRadiusY);
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if (shapeObj.getFillColor() != null && !shapeObj.getFillColor().isEmpty()) {
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canvas.fillStroke();
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} else {
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canvas.stroke();
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}
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break;
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}
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canvas.restoreState();
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} else {
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switch (shapeObj.getShapeType()) {
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case LINE:
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canvas.moveTo(x, y + height);
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canvas.lineTo(x + width, y);
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canvas.stroke();
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break;
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case RECTANGLE:
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canvas.rectangle(x, y, width, height);
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if (shapeObj.getFillColor() != null && !shapeObj.getFillColor().isEmpty()) {
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canvas.fillStroke();
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} else {
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canvas.stroke();
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}
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break;
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case CIRCLE:
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float radius = Math.min(width, height) / 2f;
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float centerX = x + radius;
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float centerY = y + radius;
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canvas.ellipse(centerX + radius, centerY - radius, centerX - radius, centerY + radius); // 宽高相等才是正圆
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if (shapeObj.getFillColor() != null && !shapeObj.getFillColor().isEmpty()) {
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canvas.fillStroke();
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} else {
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canvas.stroke();
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}
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break;
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case ELLIPSE:
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float ellipseRadiusX = width / 2f;
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float ellipseRadiusY = height / 2f;
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float ellipseCenterX = x + ellipseRadiusX;
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float ellipseCenterY = y + ellipseRadiusY;
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canvas.ellipse(ellipseCenterX + ellipseRadiusX, ellipseCenterY - ellipseRadiusY, ellipseCenterX - ellipseRadiusX, ellipseCenterY + ellipseRadiusY);
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if (shapeObj.getFillColor() != null && !shapeObj.getFillColor().isEmpty()) {
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canvas.fillStroke();
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} else {
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canvas.stroke();
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}
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break;
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}
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} catch (Exception e) {
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Paragraph para = new Paragraph("[无法加载图片: " + e.getMessage() + "]",
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new com.itextpdf.text.Font(com.itextpdf.text.Font.FontFamily.HELVETICA, 10));
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para.setSpacingAfter(5);
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document.add(para);
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}
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canvas.restoreState();
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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/**
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* 按位置添加图片对象
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*/
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private static void addImageObjectWithPosition(Document document, PdfContentByte canvas, ImageObject imageObj, float x, float y, float width, float height) {
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try {
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String imagePath = imageObj.getImagePath();
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if (imagePath != null && new File(imagePath).exists()) {
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Image img = Image.getInstance(imagePath);
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// 设置图片大小
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img.scaleAbsolute(width, height);
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// 处理旋转
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double rotation = imageObj.getRotation();
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if (rotation != 0) {
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canvas.saveState();
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float centerX = x + width / 2f;
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float centerY = y + height / 2f;
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canvas.concatCTM(
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(float) Math.cos(Math.toRadians(rotation)),
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(float) Math.sin(Math.toRadians(rotation)),
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(float) -Math.sin(Math.toRadians(rotation)),
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(float) Math.cos(Math.toRadians(rotation)),
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centerX - centerX * (float) Math.cos(Math.toRadians(rotation)) + centerY * (float) Math.sin(Math.toRadians(rotation)),
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centerY - centerX * (float) Math.sin(Math.toRadians(rotation)) - centerY * (float) Math.cos(Math.toRadians(rotation))
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);
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img.setAbsolutePosition(x, y);
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canvas.addImage(img);
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canvas.restoreState();
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} else {
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img.setAbsolutePosition(x, y);
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canvas.addImage(img);
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}
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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}
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Block a user