1 files changed, 214 insertions, 0 deletions
diff --git a/src/java/org/apache/fop/render/print/PageableRenderer.java b/src/java/org/apache/fop/render/print/PageableRenderer.java
new file mode 100644
index 000000000..947708cef
--- /dev/null
+++ b/src/java/org/apache/fop/render/print/PageableRenderer.java
@@ -0,0 +1,214 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* $Id$ */
+
+package org.apache.fop.render.print;
+
+import java.awt.geom.Rectangle2D;
+import java.awt.print.PageFormat;
+import java.awt.print.Pageable;
+import java.awt.print.Paper;
+import java.awt.print.Printable;
+import java.io.IOException;
+import java.util.Map;
+
+import org.apache.fop.apps.FOPException;
+import org.apache.fop.apps.FOUserAgent;
+import org.apache.fop.area.PageViewport;
+import org.apache.fop.render.java2d.Java2DRenderer;
+
+/**
+ * Renderer that prints through java.awt.PrintJob.
+ * The actual printing is handled by Java2DRenderer
+ * since both PrintRenderer and AWTRenderer need to
+ * support printing.
+ */
+public class PageableRenderer extends Java2DRenderer implements Pageable {
+
+    /**
+     * Printing parameter: the pages to be printed (all, even or odd),
+     * datatype: the strings "all", "even" or "odd" or one of PagesMode.*
+     */
+    public static final String PAGES_MODE = "even-odd";
+
+    /**
+     * Printing parameter: the page number (1-based) of the first page to be printed,
+     * datatype: a positive Integer
+     */
+    public static final String START_PAGE = "start-page";
+
+    /**
+     * Printing parameter: the page number (1-based) of the last page to be printed,
+     * datatype: a positive Integer
+     */
+    public static final String END_PAGE = "end-page";
+    
+    
+    /** first valid page number (1-based) */
+    protected int startNumber = 0;
+    /** last valid page number (1-based) */
+    protected int endNumber = -1;
+
+    /** indicates which pages are valid: odd, even or all */
+    protected PagesMode mode = PagesMode.ALL;
+
+    private PageFilter pageFilter;
+    
+    /**
+     * Creates a new PageableRenderer.
+     */
+    public PageableRenderer() {
+    }
+    
+    /** {@inheritDoc} */
+    public void setUserAgent(FOUserAgent agent) {
+        super.setUserAgent(agent);
+        
+        Map rendererOptions = agent.getRendererOptions();
+        processOptions(rendererOptions);
+        this.pageFilter = new DefaultPageFilter();
+    }
+
+    private void processOptions(Map rendererOptions) {
+        Object o = rendererOptions.get(PageableRenderer.PAGES_MODE);
+        if (o != null) {
+            if (o instanceof PagesMode) {
+                this.mode = (PagesMode)o;
+            } else if (o instanceof String) {
+                this.mode = PagesMode.byName((String)o);
+            } else {
+                throw new IllegalArgumentException(
+                        "Renderer option " + PageableRenderer.PAGES_MODE
+                        + " must be an 'all', 'even', 'odd' or a PagesMode instance.");
+            }
+        }
+        
+        o = rendererOptions.get(PageableRenderer.START_PAGE);
+        if (o != null) {
+            this.startNumber = getPositiveInteger(o);
+        }
+        o = rendererOptions.get(PageableRenderer.END_PAGE);
+        if (o != null) {
+            this.endNumber = getPositiveInteger(o);
+        }
+        if (this.endNumber >= 0 && this.endNumber < this.endNumber) {
+            this.endNumber = this.startNumber;
+        }
+    }
+
+    /**
+     * Converts an object into a positive integer value if possible. The method throws an
+     * {@link IllegalArgumentException} if the value is invalid.
+     * @param o the object to be converted
+     * @return the positive integer
+     */
+    protected int getPositiveInteger(Object o) {
+        if (o instanceof Integer) {
+            Integer i = (Integer)o;
+            if (i.intValue() < 1) {
+                throw new IllegalArgumentException(
+                        "Value must be a positive Integer");
+            }
+            return i.intValue();
+        } else if (o instanceof String) {
+            return Integer.parseInt((String)o);
+        } else {
+            throw new IllegalArgumentException(
+                    "Value must be a positive integer");
+        }
+    }
+    
+    /** {@inheritDoc} */
+    public void stopRenderer() throws IOException {
+        super.stopRenderer();
+
+        if (endNumber == -1) {
+            // was not set on command line
+            endNumber = getNumberOfPages();
+        }
+    }
+
+    /** {@inheritDoc} */
+    protected void rememberPage(PageViewport pageViewport) {
+        if (this.pageFilter.isValid(pageViewport)) {
+            super.rememberPage(pageViewport);
+        }
+    }
+    
+    private interface PageFilter {
+        boolean isValid(PageViewport page);
+    }
+
+    private class DefaultPageFilter implements PageFilter {
+        
+        public boolean isValid(PageViewport page) {
+            int pageNum = page.getPageIndex() + 1;
+            assert pageNum >= 0;
+            if (pageNum < startNumber || (endNumber >= 0 && pageNum > endNumber)) {
+                return false;
+            } else if (mode != PagesMode.ALL) {
+                if (mode == PagesMode.EVEN && (pageNum % 2 != 0)) {
+                    return false;
+                } else if (mode == PagesMode.ODD && (pageNum % 2 == 0)) {
+                    return false;
+                }
+            }
+            return true;
+        }
+    }
+    
+    /** {@inheritDoc} */
+    public PageFormat getPageFormat(int pageIndex)
+            throws IndexOutOfBoundsException {
+        try {
+            if (pageIndex >= getNumberOfPages()) {
+                return null;
+            }
+    
+            PageFormat pageFormat = new PageFormat();
+    
+            Paper paper = new Paper();
+    
+            Rectangle2D dim = getPageViewport(pageIndex).getViewArea();
+            double width = dim.getWidth();
+            double height = dim.getHeight();
+    
+            // if the width is greater than the height assume landscape mode
+            // and swap the width and height values in the paper format
+            if (width > height) {
+                paper.setImageableArea(0, 0, height / 1000d, width / 1000d);
+                paper.setSize(height / 1000d, width / 1000d);
+                pageFormat.setOrientation(PageFormat.LANDSCAPE);
+            } else {
+                paper.setImageableArea(0, 0, width / 1000d, height / 1000d);
+                paper.setSize(width / 1000d, height / 1000d);
+                pageFormat.setOrientation(PageFormat.PORTRAIT);
+            }
+            pageFormat.setPaper(paper);
+            return pageFormat;
+        } catch (FOPException fopEx) {
+            throw new IndexOutOfBoundsException(fopEx.getMessage());
+        }
+    }
+
+    /** {@inheritDoc} */
+    public Printable getPrintable(int pageIndex)
+            throws IndexOutOfBoundsException {
+        return this;
+    }
+}