/* * $Id: LazyFont.java,v 1.3 2003/03/06 17:43:05 jeremias Exp $ * ============================================================================ * 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 . For more information on the Apache * Software Foundation, please see . */ package org.apache.fop.fonts; //Java import java.util.Map; //FOP /** * This class is used to defer the loading of a font until it is really used. */ public class LazyFont extends Typeface implements FontDescriptor { private String metricsFileName = null; private String fontEmbedPath = null; private boolean useKerning = false; private boolean isMetricsLoaded = false; private Typeface realFont = null; private FontDescriptor realFontDescriptor = null; /** * Main constructor * @param fontEmbedPath path to embeddable file (may be null) * @param metricsFileName path to the metrics XML file * @param useKerning True, if kerning should be enabled */ public LazyFont(String fontEmbedPath, String metricsFileName, boolean useKerning) { this.metricsFileName = metricsFileName; this.fontEmbedPath = fontEmbedPath; this.useKerning = useKerning; } private void load() { if (!isMetricsLoaded) { isMetricsLoaded = true; try { /**@todo Possible thread problem here */ FontReader reader = new FontReader(metricsFileName); reader.setKerningEnabled(useKerning); reader.setFontEmbedPath(fontEmbedPath); realFont = reader.getFont(); if (realFont instanceof FontDescriptor) { realFontDescriptor = (FontDescriptor) realFont; } // System.out.println("Metrics " + metricsFileName + " loaded."); } catch (Exception ex) { ex.printStackTrace(); /**@todo Log this exception */ //log.error("Failed to read font metrics file " // + metricsFileName // + " : " + ex.getMessage()); } } } /** * Gets the real font. * @return the real font */ public Typeface getRealFont() { load(); return realFont; } // ---- Font ---- /** * @see org.apache.fop.fonts.Typeface#getEncoding() */ public String getEncoding() { load(); return realFont.getEncoding(); } /** * @see org.apache.fop.fonts.Font#mapChar(char) */ public char mapChar(char c) { load(); return realFont.mapChar(c); } /** * @see org.apache.fop.fonts.Typeface#isMultiByte() */ public boolean isMultiByte() { return realFont.isMultiByte(); } // ---- FontMetrics interface ---- /** * @see org.apache.fop.fonts.FontMetrics#getFontName() */ public String getFontName() { load(); return realFont.getFontName(); } /** * @see org.apache.fop.fonts.FontMetrics#getAscender(int) */ public int getAscender(int size) { load(); return realFont.getAscender(size); } /** * @see org.apache.fop.fonts.FontMetrics#getCapHeight(int) */ public int getCapHeight(int size) { load(); return realFont.getCapHeight(size); } /** * @see org.apache.fop.fonts.FontMetrics#getDescender(int) */ public int getDescender(int size) { load(); return realFont.getDescender(size); } /** * @see org.apache.fop.fonts.FontMetrics#getXHeight(int) */ public int getXHeight(int size) { load(); return realFont.getXHeight(size); } /** * @see org.apache.fop.fonts.FontMetrics#getWidth(int, int) */ public int getWidth(int i, int size) { load(); return realFont.getWidth(i, size); } /** * @see org.apache.fop.fonts.FontMetrics#getWidths() */ public int[] getWidths() { load(); return realFont.getWidths(); } /** * @see org.apache.fop.fonts.FontMetrics#hasKerningInfo() */ public boolean hasKerningInfo() { load(); return realFont.hasKerningInfo(); } /** * @see org.apache.fop.fonts.FontMetrics#getKerningInfo() */ public Map getKerningInfo() { load(); return realFont.getKerningInfo(); } // ---- FontDescriptor interface ---- /** * @see org.apache.fop.fonts.FontDescriptor#getCapHeight() */ public int getCapHeight() { load(); return realFontDescriptor.getCapHeight(); } /** * @see org.apache.fop.fonts.FontDescriptor#getDescender() */ public int getDescender() { load(); return realFontDescriptor.getDescender(); } /** * @see org.apache.fop.fonts.FontDescriptor#getAscender() */ public int getAscender() { load(); return realFontDescriptor.getAscender(); } /** * @see org.apache.fop.fonts.FontDescriptor#getFlags() */ public int getFlags() { load(); return realFontDescriptor.getFlags(); } /** * @see org.apache.fop.fonts.FontDescriptor#getFontBBox() */ public int[] getFontBBox() { load(); return realFontDescriptor.getFontBBox(); } /** * @see org.apache.fop.fonts.FontDescriptor#getItalicAngle() */ public int getItalicAngle() { load(); return realFontDescriptor.getItalicAngle(); } /** * @see org.apache.fop.fonts.FontDescriptor#getStemV() */ public int getStemV() { load(); return realFontDescriptor.getStemV(); } /** * @see org.apache.fop.fonts.FontDescriptor#getFontType() */ public FontType getFontType() { load(); return realFontDescriptor.getFontType(); } /** * @see org.apache.fop.fonts.FontDescriptor#isEmbeddable() */ public boolean isEmbeddable() { load(); return realFontDescriptor.isEmbeddable(); } }