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Diffstat (limited to 'src/java/org/apache/fop/fonts/LazyFont.java')
| -rw-r--r-- | src/java/org/apache/fop/fonts/LazyFont.java | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/src/java/org/apache/fop/fonts/LazyFont.java b/src/java/org/apache/fop/fonts/LazyFont.java new file mode 100644 index 000000000..5534d1e55 --- /dev/null +++ b/src/java/org/apache/fop/fonts/LazyFont.java @@ -0,0 +1,287 @@ +/* + * $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 <jtauber@jtauber.com>. For more information on the Apache + * Software Foundation, please see <http://www.apache.org/>. + */ +package org.apache.fop.fonts; + +//Java +import java.util.Map; + +//FOP +import org.apache.fop.render.pdf.FontReader; + +/** + * This class is used to defer the loading of a font until it is really used. + */ +public class LazyFont extends Font implements FontDescriptor { + + private String metricsFileName = null; + private String fontEmbedPath = null; + private boolean useKerning = false; + + private boolean isMetricsLoaded = false; + private Font 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) { + /**@todo Log this exception */ + //log.error("Failed to read font metrics file " + // + metricsFileName + // + " : " + ex.getMessage()); + } + } + } + + /** + * Gets the real font. + * @return the real font + */ + public Font getRealFont() { + load(); + return realFont; + } + + // ---- Font ---- + /** + * @see org.apache.fop.fonts.Font#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.Font#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(); + } + +} + |