finekit/src/main/java/com/fanruan/api/report/PrintKit.java

package com.fanruan.api.report;

import com.fanruan.api.log.LogKit;
import com.fr.base.Margin;
import com.fr.main.FineBook;
import com.fr.page.ClippedPageProvider;
import com.fr.page.PaperSettingProvider;
import com.fr.page.ReportPageProvider;
import com.fr.page.ReportSettingsProvider;
import com.fr.report.cell.CellElement;
import com.fr.report.cell.cellattr.CellGUIAttr;
import com.fr.report.stable.ReportSettings;
import com.fr.stable.Constants;
import org.jetbrains.annotations.Nullable;

import java.util.ArrayList;
import java.util.List;

/**
 * @author richie
 * @version 10.0
 * Created by richie on 2019/9/25
 * 报表打印导出相关工具类
 */
public class PrintKit {

    private PrintKit() {

    }

    /**
     * 根据模板获取打印/导出的页面设置
     *
     * @param book 模板
     * @return 多个待打印对象的页面设置集合
     */
    public static List<PaperSettingProvider> getPaperSettings(FineBook book) {
        return PrintKit.getPaperSettings(book, null);
    }

    /**
     * 根据模板获取打印/导出的页面设置
     *
     * @param book         模板
     * @param offsetMargin 偏移量
     * @return 多个待打印对象的页面设置集合
     */
    public static @Nullable List<PaperSettingProvider> getPaperSettings(FineBook book, Margin offsetMargin) {
        if (book == null) {
            return null;
        }
        List<PaperSettingProvider> list = new ArrayList<>();
        ReportSettingsProvider reportSettings;
        for (int i = 0; i < book.getReportCount(); i++) {
            reportSettings = book.getReport(i).getReportSettings();
            if (reportSettings == null) {
                reportSettings = ReportSettings.DEFAULTSETTINGS;
            }
            try {
                PaperSettingProvider setting = (PaperSettingProvider) reportSettings.getPaperSetting().clone();
                Margin margin = setting.getMargin();
                /*
                 * 偏移量top、left为加，button 、right为减
                 */
                if (offsetMargin != null) {
                    margin.setTop(margin.getTop().add(offsetMargin.getTop()));
                    margin.setLeft(margin.getLeft().add(offsetMargin.getLeft()));
                    margin.setBottom(margin.getBottom().subtract(offsetMargin.getBottom()));
                    margin.setRight(margin.getRight().subtract(offsetMargin.getRight()));
                }
                list.add(setting);
            } catch (CloneNotSupportedException e) {
                LogKit.error(e.getMessage(), e);
                break;
            }
        }
        return list;
    }

    /**
     * 选取分页结果对象中可导出的对象，如果没有可导出对象，会返回null。
     *
     * @param reportPage 分页结果对象
     * @return 可导出对象
     */
    public static @Nullable ClippedPageProvider pick(ReportPageProvider reportPage) {
        if (reportPage == null) {
            return null;
        }
        ClippedPageProvider[] clippers = reportPage.getPages();
        if (clippers.length == 1 && clippers[0] != null) {
            ClippedPageProvider cp = clippers[0];
            cp.deriveResolution(Constants.FR_PAINT_RESOLUTION);
            return cp;
        }
        return null;
    }

    /**
     * 单元格是否可打印/导出，典型的如：以html格式显示的单元格，就是不可打印/导出的
     *
     * @param cell 单元格
     * @return 单元格内容可打印/导出则返回true，否则返回false
     */
    public static boolean isCellPrintable(CellElement cell) {
        if (cell == null) {
            return false;
        }
        CellGUIAttr gui = cell.getCellGUIAttr();
        return gui == null || gui.isPrintContent();
    }
}