package com.dsh.course.util;

import com.itextpdf.html2pdf.ConverterProperties;
import com.itextpdf.html2pdf.HtmlConverter;
import com.itextpdf.kernel.events.PdfDocumentEvent;
import com.itextpdf.kernel.font.PdfFont;
import com.itextpdf.kernel.font.PdfFontFactory;
import com.itextpdf.kernel.geom.PageSize;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.font.FontProvider;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/**
 * @author zhibing.pu
 * @Date 2023/8/14 11:13
 */
public class HtmlToPdfUtils {

    public static void convertToPdf(InputStream inputStream, String waterMark, OutputStream outputStream) throws IOException {

        PdfWriter pdfWriter = new PdfWriter(outputStream);
        PdfDocument pdfDocument = new PdfDocument(pdfWriter);
        //设置为A4大小
        pdfDocument.setDefaultPageSize(PageSize.A4);
        //添加水印
//        pdfDocument.addEventHandler(PdfDocumentEvent.END_PAGE, new WaterMarkEventHandler(waterMark));

        //添加页码
        //pdfDocument.addEventHandler(PdfDocumentEvent.END_PAGE,new PageEventHandler());
        //添加中文字体支持
        ConverterProperties properties = new ConverterProperties();
        FontProvider fontProvider = new FontProvider();

        PdfFont sysFont = PdfFontFactory.createFont("STSongStd-Light", "UniGB-UCS2-H", false);
        fontProvider.addFont(sysFont.getFontProgram(), "UniGB-UCS2-H");

        //添加自定义字体，例如微软雅黑
        /*if (StringUtils.isNotBlank(fontPath)){
            PdfFont microsoft = PdfFontFactory.createFont(fontPath, PdfEncodings.IDENTITY_H, false);
            fontProvider.addFont(microsoft.getFontProgram(), PdfEncodings.IDENTITY_H);
        }*/

        properties.setFontProvider(fontProvider);
        HtmlConverter.convertToPdf(inputStream, pdfDocument, properties);

        pdfWriter.close();
        pdfDocument.close();
    }
}