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- /*
- * 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.UnsupportedEncodingException;
- import java.util.ArrayList;
- import java.util.List;
-
- import org.apache.fop.render.afp.AFPFontColor;
- import org.apache.fop.render.afp.fonts.AFPFont;
- import org.apache.fop.render.afp.tools.StringUtils;
-
- /**
- * 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 abstract class AbstractPageObject extends AbstractNamedAFPObject {
-
- /**
- * The active environment group for the page
- */
- protected ActiveEnvironmentGroup _activeEnvironmentGroup = null;
-
- /**
- * The presentation text object, we only have one per page
- */
- private PresentationTextObject _presentationTextObject = null;
-
- /**
- * The list of objects within the page
- */
- protected List _objects = new ArrayList();
-
- /**
- * The list of tag logical elements
- */
- protected ArrayList _tagLogicalElements = new ArrayList();
-
- /**
- * The list of the include page segments
- */
- protected ArrayList _segments = new ArrayList();
-
- /**
- * The page width
- */
- private int _width;
-
- /**
- * The page height
- */
- private int _height;
-
- /**
- * The page rotation
- */
- private int _rotation = 0;
-
- /**
- * The page state
- */
- private boolean _complete = false;
-
- /**
- * 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 AbstractPageObject(String name, int width, int height, int rotation) {
-
- super(name);
-
- _name = name;
-
- _rotation = rotation;
- _width = width;
- _height = height;
-
- /**
- * Every page object must have an ActiveEnvironmentGroup
- */
- _activeEnvironmentGroup = new ActiveEnvironmentGroup(_width, _height);
-
- if (_rotation != 0) {
- switch (_rotation) {
- case 90:
- _activeEnvironmentGroup.setPosition(_width, 0, _rotation);
- break;
- case 180:
- _activeEnvironmentGroup.setPosition(_width, _height, _rotation);
- break;
- case 270:
- _activeEnvironmentGroup.setPosition(0, _height, _rotation);
- break;
- }
- }
-
- /**
- * We have a presentation text object per page
- */
- _presentationTextObject = new PresentationTextObject();
- _objects.add(_presentationTextObject);
-
- }
-
- /**
- * Helper method to create a map coded font object on the current page, this
- * method delegates the construction of the map coded font object to the
- * active environment group on the page.
- *
- * @param fontReference
- * the font number used as the resource identifier
- * @param font
- * the font
- * @param size
- * the point size of the font
- */
- public void createFont(byte fontReference, AFPFont font, int size) {
-
- _activeEnvironmentGroup.createFont(fontReference, font, size, 0);
-
- }
-
- /**
- * Helper method to create a line on the current page, this method delegates
- * to the presentation text object in order to construct the line.
- *
- * @param x1
- * the first x coordinate of the line
- * @param y1
- * the first y coordinate of the line
- * @param x2
- * the second x coordinate of the line
- * @param y2
- * the second y coordinate of the line
- * @param thickness
- * the thickness of the line
- * @param rotation
- * the rotation of the line
- * @param col
- * The text color.
- */
- public void createLine(int x1, int y1, int x2, int y2, int thickness, int rotation, AFPFontColor col) {
-
- if (_presentationTextObject == null) {
- _presentationTextObject = new PresentationTextObject();
- _objects.add(_presentationTextObject);
- }
- _presentationTextObject.createLineData(x1, y1, x2, y2, thickness, rotation, col);
-
- }
-
- /**
- * Helper method to create text on the current page, this method delegates
- * to the presentation text object in order to construct the text.
- *
- * @param fontNumber
- * the font number used as the resource identifier
- * @param x
- * the x coordinate of the text data
- * @param y
- * the y coordinate of the text data
- * @param rotation
- * the rotation of the text data
- * @param col
- * the text color
- * @param vsci
- * The variable space character increment.
- * @param ica
- * The inter character adjustment.
- * @param data
- * the text data to create
- */
- public void createText(int fontNumber, int x, int y, int rotation, AFPFontColor col, int vsci, int ica, byte[] data) {
-
- if (_presentationTextObject == null) {
- _presentationTextObject = new PresentationTextObject();
- _objects.add(_presentationTextObject);
- }
- _presentationTextObject.createTextData(fontNumber, x, y, rotation, col, vsci, ica, data);
-
- }
-
- /**
- * Helper method to mark the end of the page. This should end the control
- * sequence on the current presenation text object.
- */
- public void endPage() {
-
- _presentationTextObject.endControlSequence();
-
- _complete = true;
-
- }
-
- /**
- * This method will create shading on the page using the specified
- * coordinates (the shading contrast is controlled via the red, green blue
- * parameters, by converting this to grey scale).
- *
- * @param x
- * the x coordinate of the shading
- * @param y
- * the y coordinate of the shading
- * @param w
- * the width of the shaded area
- * @param h
- * the height of the shaded area
- * @param red
- * the red value
- * @param green
- * the green value
- * @param blue
- * the blue value
- */
- public void createShading(int x, int y, int w, int h, int red, int green,
- int blue) {
-
- int xCoord = 0;
- int yCoord = 0;
- int width = 0;
- int height = 0;
-
- switch (_rotation) {
- case 90:
- xCoord = _width - y - h;
- yCoord = x;
- width = h;
- height = w;
- break;
- case 180:
- xCoord = _width - x - w;
- yCoord = _height - y - h;
- width = w;
- height = h;
- break;
- case 270:
- xCoord = y;
- yCoord = _height - x - w;
- width = h;
- height = w;
- break;
- default:
- xCoord = x;
- yCoord = y;
- width = w;
- height = h;
- break;
- }
-
- // Convert the color to grey scale
- float shade = (float) ((red * 0.3) + (green * 0.59) + (blue * 0.11));
-
- int greyscale = Math.round((shade / 255) * 16);
-
- String imageName = "IMG"
- + StringUtils.lpad(String.valueOf(_objects.size() + 1),
- '0', 5);
-
- IMImageObject io = new IMImageObject(imageName);
- ImageOutputControl ioc = new ImageOutputControl(0, 0);
- ImageInputDescriptor iid = new ImageInputDescriptor();
- ImageCellPosition icp = new ImageCellPosition(xCoord, yCoord);
- icp.setXFillSize(width);
- icp.setYFillSize(height);
- icp.setXSize(64);
- icp.setYSize(8);
-
- //defing this as a resource
- ImageRasterData ird = new ImageRasterData(ImageRasterPattern
- .getRasterData(greyscale));
-
- io.setImageOutputControl(ioc);
- io.setImageInputDescriptor(iid);
- io.setImageCellPosition(icp);
- io.setImageRasterData(ird);
- _objects.add(io);
-
- }
-
- /**
- * Helper method to create an image on the current page and to return
- * the object.
- */
- public ImageObject getImageObject() {
-
- if (_presentationTextObject != null) {
- _presentationTextObject.endControlSequence();
- }
- _presentationTextObject = null;
-
- String imageName = "IMG"
- + StringUtils.lpad(String.valueOf(_objects.size() + 1),
- '0', 5);
-
- ImageObject io = new ImageObject(imageName);
- _objects.add(io);
- return io;
- }
-
- /**
- * Creates a TagLogicalElement on the page.
- *
- * @param name
- * the name of the tag
- * @param value
- * the value of the tag
- */
- public void createTagLogicalElement(String name, String value) {
-
- TagLogicalElement tle = new TagLogicalElement(name, value);
- _tagLogicalElements.add(tle);
-
- }
-
- /**
- * Creates an IncludePageSegment on the current page.
- *
- * @param name
- * the name of the page segment
- * @param xCoor
- * the x cooridinate of the page segment.
- * @param yCoor
- * the y cooridinate of the page segment.
- */
- public void createIncludePageSegment(String name, int xCoor, int yCoor) {
-
- IncludePageSegment ips = new IncludePageSegment(name, xCoor, yCoor);
- _segments.add(ips);
-
- }
-
- /**
- * Returns the ActiveEnvironmentGroup associated with this page.
- *
- * @return the ActiveEnvironmentGroup object
- */
- public ActiveEnvironmentGroup getActiveEnvironmentGroup() {
- return _activeEnvironmentGroup;
- }
-
- /**
- * Returns an indication if the page is complete
- */
- public boolean isComplete() {
- return _complete;
- }
-
- /**
- * Returns the height of the page
- */
- public int getHeight() {
- return _height;
- }
-
- /**
- * Returns the width of the page
- */
- public int getWidth() {
- return _width;
- }
-
- /**
- * Returns the rotation of the page
- */
- public int getRotation() {
- return _rotation;
- }
-
- }
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