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Diffstat (limited to 'src/java/org/apache/fop/render/afp/modca/PageObject.java')
| -rw-r--r-- | src/java/org/apache/fop/render/afp/modca/PageObject.java | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/src/java/org/apache/fop/render/afp/modca/PageObject.java b/src/java/org/apache/fop/render/afp/modca/PageObject.java new file mode 100644 index 000000000..102d7380e --- /dev/null +++ b/src/java/org/apache/fop/render/afp/modca/PageObject.java @@ -0,0 +1,185 @@ +/* + * Copyright 2006 The Apache Software Foundation. + * + * Licensed 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.afp.modca; +import java.io.IOException; +import java.io.OutputStream; + + + +/** + * Pages contain the data objects that comprise a presentation document. Each + * page has a set of data objects associated with it. Each page within a + * document is independent from any other page, and each must establish its own + * environment parameters. + * + * The page is the level in the document component hierarchy that is used for + * printing or displaying a document's content. The data objects contained in + * the page envelope in the data stream are presented when the page is + * presented. Each data object has layout information associated with it that + * directs the placement and orientation of the data on the page. In addition, + * each page contains layout information that specifies the measurement units, + * page width, and page depth. + * + * A page is initiated by a begin page structured field and terminated by an end + * page structured field. Structured fields that define objects and active + * environment groups or that specify attributes of the page may be encountered + * in page state. + * + */ +public class PageObject extends AbstractPageObject { + + /** + * The resource group object + */ + private ResourceGroup _resourceGroup = null; + + /** + * Construct a new page object for the specified name argument, the page + * name should be an 8 character identifier. + * + * @param name + * the name of the page. + * @param width + * the width of the page. + * @param height + * the height of the page. + * @param rotation + * the rotation of the page. + */ + public PageObject(String name, int width, int height, int rotation) { + + super(name, width, height, rotation); + + } + + /** + * Adds an overlay to the page resources + * @param overlay the overlay to add + */ + public void addOverlay(Overlay overlay) { + if (_resourceGroup == null) { + _resourceGroup = new ResourceGroup(); + } + _resourceGroup.addOverlay(overlay); + } + + /** + * Creates an IncludePageOverlay on the page. + * + * @param name + * the name of the overlay + * @param x + * the x position of the overlay + * @param y + * the y position of the overlay + * @param orientation + * the orientation required for the overlay + */ + public void createIncludePageOverlay(String name, int x, int y, int orientation) { + + IncludePageOverlay ipo = new IncludePageOverlay(name, x, y, orientation); + _objects.add(ipo); + + } + + /** + * Accessor method to write the AFP datastream for the page. + * @param os The stream to write to + * @throws java.io.IOException + */ + public void writeDataStream(OutputStream os) + throws IOException { + + writeStart(os); + + if (_resourceGroup != null) { + _resourceGroup.writeDataStream(os); + } + + _activeEnvironmentGroup.writeDataStream(os); + + writeObjectList(_segments, os); + + writeObjectList(_tagLogicalElements, os); + + writeObjectList(_objects, os); + + writeEnd(os); + + } + + /** + * Helper method to write the start of the page. + * @param os The stream to write to + */ + private void writeStart(OutputStream os) + throws IOException { + + byte[] data = new byte[17]; + + data[0] = 0x5A; // Structured field identifier + data[1] = 0x00; // Length byte 1 + data[2] = 0x10; // Length byte 2 + data[3] = (byte) 0xD3; // Structured field id byte 1 + data[4] = (byte) 0xA8; // Structured field id byte 2 + data[5] = (byte) 0xAF; // Structured field id byte 3 + data[6] = 0x00; // Flags + data[7] = 0x00; // Reserved + data[8] = 0x00; // Reserved + + for (int i = 0; i < _nameBytes.length; i++) { + + data[9 + i] = _nameBytes[i]; + + } + + os.write(data); + + } + + /** + * Helper method to write the end of the page. + * @param os The stream to write to + */ + private void writeEnd(OutputStream os) + throws IOException { + + byte[] data = new byte[17]; + + data[0] = 0x5A; // Structured field identifier + data[1] = 0x00; // Length byte 1 + data[2] = 0x10; // Length byte 2 + data[3] = (byte) 0xD3; // Structured field id byte 1 + data[4] = (byte) 0xA9; // Structured field id byte 2 + data[5] = (byte) 0xAF; // Structured field id byte 3 + data[6] = 0x00; // Flags + data[7] = 0x00; // Reserved + data[8] = 0x00; // Reserved + + for (int i = 0; i < _nameBytes.length; i++) { + + data[9 + i] = _nameBytes[i]; + + } + + os.write(data); + + } + +}
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