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- /*
- * $Id$
- * ============================================================================
- * The Apache Software License, Version 1.1
- * ============================================================================
- *
- * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modifica-
- * tion, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * 3. The end-user documentation included with the redistribution, if any, must
- * include the following acknowledgment: "This product includes software
- * developed by the Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself, if
- * and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "FOP" and "Apache Software Foundation" must not be used to
- * endorse or promote products derived from this software without prior
- * written permission. For written permission, please contact
- * apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache", nor may
- * "Apache" appear in their name, without prior written permission of the
- * Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
- * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * ============================================================================
- *
- * This software consists of voluntary contributions made by many individuals
- * on behalf of the Apache Software Foundation and was originally created by
- * James Tauber <jtauber@jtauber.com>. For more information on the Apache
- * Software Foundation, please see <http://www.apache.org/>.
- */
- package org.apache.fop.render.rtf;
-
- import java.util.Map;
- import java.util.HashMap;
-
- //FOP
- import org.apache.fop.apps.FOPException;
-
-
- /** Converts XSL-FO units to RTF units
- *
- * @author Bertrand Delacretaz <bdelacretaz@codeconsult.ch>
- * @author putzi
- * @author Peter Herweg <pherweg@web.de>
- *
- * This class was originally developed by Bertrand Delacretaz bdelacretaz@codeconsult.ch
- * for the JFOR project and is now integrated into FOP.
- */
-
- class FoUnitsConverter {
- private static final FoUnitsConverter m_instance = new FoUnitsConverter();
-
- /** points to twips: 1 twip is 1/20 of a point */
- public static final float POINT_TO_TWIPS = 20f;
-
- /** millimeters and centimeters to twips: , one point is 1/72 of an inch, one inch is 25.4 mm */
- public static final float IN_TO_TWIPS = 72f * POINT_TO_TWIPS;
- public static final float MM_TO_TWIPS = IN_TO_TWIPS / 25.4f;
- public static final float CM_TO_TWIPS = 10 * MM_TO_TWIPS;
-
-
- /** conversion factors keyed by xsl:fo units names */
- private static final Map m_twipFactors = new HashMap();
- static {
- m_twipFactors.put("mm", new Float(MM_TO_TWIPS));
- m_twipFactors.put("cm", new Float(CM_TO_TWIPS));
- m_twipFactors.put("pt", new Float(POINT_TO_TWIPS));
- m_twipFactors.put("in", new Float(IN_TO_TWIPS));
- }
-
- /** singleton pattern */
- private FoUnitsConverter() {
- }
-
- /** singleton pattern */
- static FoUnitsConverter getInstance() {
- return m_instance;
- }
-
- /** convert given value to RTF units
- * @param foValue a value like "12mm"
- * TODO: tested with "mm" units only, needs work to comply with FO spec
- * Why does it search for period instead of simply breaking last two
- * Characters into another units string? - Chris
- */
- float convertToTwips(String foValue)
- throws FOPException {
- foValue = foValue.trim();
-
- // break value into number and units
- final StringBuffer number = new StringBuffer();
- final StringBuffer units = new StringBuffer();
-
- for (int i = 0; i < foValue.length(); i++) {
- final char c = foValue.charAt(i);
- if (Character.isDigit(c) || c == '.') {
- number.append(c);
- } else {
- // found the end of the digits
- units.append(foValue.substring(i).trim());
- break;
- }
- }
-
- return numberToTwips(number.toString(), units.toString());
- }
-
-
- /** convert given value to twips according to given units */
- private float numberToTwips(String number, String units)
- throws FOPException {
- float result = 0;
-
- // convert number to integer
- try {
- if (number != null && number.trim().length() > 0) {
- result = Float.valueOf(number).floatValue();
- }
- } catch (Exception e) {
- throw new FOPException("number format error: cannot convert '"
- + number + "' to float value");
- }
-
- // find conversion factor
- if (units != null && units.trim().length() > 0) {
- final Float factor = (Float)m_twipFactors.get(units.toLowerCase());
- if (factor == null) {
- throw new FOPException("conversion factor not found for '" + units + "' units");
- }
- result *= factor.floatValue();
- }
-
- return result;
- }
-
- /** convert a font size given in points like "12pt" */
- int convertFontSize(String size) throws FOPException {
- size = size.trim();
- final String FONT_SUFFIX = "pt";
- if (!size.endsWith(FONT_SUFFIX)) {
- throw new FOPException("Invalid font size '" + size + "', must end with '"
- + FONT_SUFFIX + "'");
- }
-
- float result = 0;
- size = size.substring(0, size.length() - FONT_SUFFIX.length());
- try {
- result = (Float.valueOf(size).floatValue());
- } catch (Exception e) {
- throw new FOPException("Invalid font size value '" + size + "'");
- }
-
- // RTF font size units are in half-points
- return (int)(result * 2.0);
- }
- }
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