Add export multiple pages

umlet-elements/src/main/java/com/baselet/element/facet/PropertiesParserState.java

@@ -29,6 +29,7 @@ public class PropertiesParserState {
 	private StickingPolygonGenerator stickingPolygonGenerator = SimpleStickingPolygonGenerator.INSTANCE;
 	private double totalTextBlockHeight;
 	private final Map<Class<? extends Facet>, Object> facetResponse = new HashMap<Class<? extends Facet>, Object>();
+	private String page;
 
 	public PropertiesParserState(Settings settings, DrawHandler drawer) {
 		this.settings = settings;
@@ -46,6 +47,7 @@ public void resetValues(Dimension gridElementSize, double totalTextBlockHeight,
 		this.totalTextBlockHeight = totalTextBlockHeight;
 		facetResponse.clear();
 		drawer.setEnableDrawing(enableDrawing);
+		page = "";
 	}
 
 	public Alignment getAlignment() {
@@ -152,4 +154,12 @@ public void setDrawer(DrawHandler drawer) {
 		this.drawer = drawer;
 	}
 
+	public void setPage(String page) {
+		this.page = page;
+	}
+
+	public String getPage() {
+		return page;
+	}
+
 }

umlet-elements/src/main/java/com/baselet/element/facet/Settings.java

@@ -21,6 +21,7 @@
 import com.baselet.element.facet.common.LayerFacet;
 import com.baselet.element.facet.common.LineTypeFacet;
 import com.baselet.element.facet.common.LineWidthFacet;
+import com.baselet.element.facet.common.PageFacet;
 import com.baselet.element.facet.common.SeparatorLineFacet;
 import com.baselet.element.facet.common.TextPrintFacet;
 import com.baselet.element.facet.common.TransparencyFacet;
@@ -39,7 +40,7 @@
  */
 public abstract class Settings {
 	// the following lists are default facet configurations. they are declared here as a simple overview and for easy reuse
-	protected static final List<Facet> BASE = listOf(BackgroundColorFacet.INSTANCE, TransparencyFacet.INSTANCE, ForegroundColorFacet.INSTANCE, LayerFacet.INSTANCE, LineWidthFacet.INSTANCE, GroupFacet.INSTANCE, CommentFacet.INSTANCE);
+	protected static final List<Facet> BASE = listOf(BackgroundColorFacet.INSTANCE, TransparencyFacet.INSTANCE, ForegroundColorFacet.INSTANCE, LayerFacet.INSTANCE, LineWidthFacet.INSTANCE, GroupFacet.INSTANCE, CommentFacet.INSTANCE, PageFacet.INSTANCE);
 	protected static final List<Facet> BASE_WITH_LINETYPE = listOf(BASE, LineTypeFacet.INSTANCE, CustomDrawingFacet.INSTANCE, AdvancedDrawingsFacet.INSTANCE);
 	protected static final List<Facet> BASE_EXTENDED = listOf(BASE_WITH_LINETYPE, TextPrintFacet.INSTANCE, FontSizeFacet.INSTANCE);
 

umlet-elements/src/main/java/com/baselet/element/facet/common/PageFacet.java

@@ -0,0 +1,33 @@
+package com.baselet.element.facet.common;
+
+import com.baselet.diagram.draw.helper.StyleException;
+import com.baselet.element.facet.FirstRunKeyValueFacet;
+import com.baselet.element.facet.PropertiesParserState;
+
+public class PageFacet extends FirstRunKeyValueFacet {
+
+	public static final PageFacet INSTANCE = new PageFacet();
+
+	private PageFacet() {
+	}
+
+	public static final String KEY = "page";
+	public static final String DEFAULT_VALUE = "";
+
+	@Override
+	public KeyValue getKeyValue() {
+		return new KeyValue(KEY, false, DEFAULT_VALUE.toString(), "Page frame to print");
+	}
+
+	@Override
+	public void handleValue(String value, PropertiesParserState state) {
+		if (value.matches("\\S+")) {
+			state.setPage(value);
+		}
+		else {
+			throw new StyleException("page identifier must be text w/o whitespaces");
+		}
+
+	}
+
+}

umlet-swing/src/main/java/com/baselet/diagram/DrawPanel.java

@@ -190,6 +190,34 @@ public List<GridElement> getGridElements() {
 		return gridElements;
 	}
 
+	public List<GridElement> getPages() {
+		List<GridElement> pages = new ArrayList<GridElement>();
+
+		// Search for pages
+		for (GridElement e : getGridElements()) {
+			if (null != e.getSetting("page")) {
+				pages.add(e);
+			}
+		}
+
+		return pages;
+	}
+
+	public List<GridElement> getPageElements(GridElement page) {
+
+		List<GridElement> pageElements = new ArrayList<GridElement>();
+		pageElements.add(page);
+
+		// Identify the elements per page
+		Rectangle pageArea = page.getRectangle();
+		for (GridElement e : getGridElements()) {
+			if (e.isInRange(pageArea)) {
+				pageElements.add(e);
+			}
+		}
+		return pageElements;
+	}
+
 	public List<Relation> getOldRelations() {
 		return getHelper(Relation.class);
 	}

umlet-swing/src/main/java/com/baselet/diagram/io/OutputHandler.java

@@ -48,12 +48,14 @@
 
 public class OutputHandler {
 
-	private OutputHandler() {} // private constructor to avoid instantiation
+	private OutputHandler() {
+	} // private constructor to avoid instantiation
 
 	public static void createAndOutputToFile(String extension, File file, DiagramHandler handler) throws Exception {
 		OutputStream ostream = new FileOutputStream(file);
 		createToStream(extension, ostream, handler);
 		ostream.close();
+		createToStreamForPages(extension, file, handler);
 	}
 
 	public static void createToStream(String extension, OutputStream ostream, DiagramHandler handler) throws Exception {
@@ -63,7 +65,8 @@ public static void createToStream(String extension, OutputStream ostream, Diagra
 
 		// if some GridElements are selected, only export them
 		Collection<GridElement> elementsToDraw = handler.getDrawPanel().getSelector().getSelectedElements();
-		// if nothing is selected, draw everything
+
+		// if no page frame is defined, draw everything
 		if (elementsToDraw.isEmpty()) {
 			elementsToDraw = handler.getDrawPanel().getGridElements();
 		}
@@ -73,6 +76,29 @@ public static void createToStream(String extension, OutputStream ostream, Diagra
 		handler.setGridAndZoom(oldZoom, false); // Zoom back to the oldGridsize after execution
 	}
 
+	private static void createToStreamForPages(String extension, File file, DiagramHandler handler) throws Exception {
+
+		// Skip export of pages if something is selected
+		if (!handler.getDrawPanel().getSelector().getSelectedElements().isEmpty()) {
+			return;
+		}
+
+		int oldZoom = handler.getGridSize();
+		handler.setGridAndZoom(Constants.DEFAULTGRIDSIZE, false); // Zoom to the defaultGridsize before execution
+
+		// File without extension
+		String filenameWholeExport = file.getAbsolutePath().replaceFirst("[.][^.]+$", "");
+
+		for (GridElement page : handler.getDrawPanel().getPages()) {
+			OutputStream ostream = new FileOutputStream(new File(filenameWholeExport + "_" + page.getSetting("page") + "." + extension));
+			Collection<GridElement> elementsToDraw = handler.getDrawPanel().getPageElements(page);
+			OutputHandler.exportToOutputStream(extension, ostream, elementsToDraw, handler.getFontHandler());
+			ostream.close();
+		}
+
+		handler.setGridAndZoom(oldZoom, false); // Zoom back to the oldGridsize after execution
+	}
+
 	private static void exportToOutputStream(String extension, OutputStream ostream, Collection<GridElement> entities, FontHandler diagramFont) throws IOException {
 		for (GridElement ge : entities) {
 			ge.getDeprecatedAddons().doBeforeExport();