增加打印导出的API

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

@@ -0,0 +1,112 @@
+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();
+    }
+}