| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.fonts; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URL; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import javax.xml.transform.Source; |
| import javax.xml.transform.stream.StreamSource; |
| |
| import org.xml.sax.InputSource; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import org.apache.fop.apps.FOPException; |
| |
| /** |
| * This class is used to defer the loading of a font until it is really used. |
| */ |
| public class LazyFont extends Typeface implements FontDescriptor { |
| |
| private static Log log = LogFactory.getLog(LazyFont.class); |
| |
| private String metricsFileName = null; |
| private String fontEmbedPath = null; |
| private boolean useKerning = false; |
| private String subFontName = null; |
| |
| private boolean isMetricsLoaded = false; |
| private Typeface realFont = null; |
| private FontDescriptor realFontDescriptor = null; |
| |
| private FontResolver resolver = null; |
| |
| /** |
| * Main constructor |
| * @param fontInfo the font info to embed |
| * @param resolver the font resolver to handle font URIs |
| */ |
| public LazyFont(EmbedFontInfo fontInfo, FontResolver resolver) { |
| |
| this.metricsFileName = fontInfo.getMetricsFile(); |
| this.fontEmbedPath = fontInfo.getEmbedFile(); |
| this.useKerning = fontInfo.getKerning(); |
| this.subFontName = fontInfo.getSubFontName(); |
| this.resolver = resolver; |
| } |
| |
| /** {@inheritDoc} */ |
| public String toString() { |
| return ( "metrics-url=" + metricsFileName + ", embed-url=" + fontEmbedPath |
| + ", kerning=" + useKerning ); |
| } |
| |
| private void load(boolean fail) { |
| if (!isMetricsLoaded) { |
| try { |
| if (metricsFileName != null) { |
| /**@todo Possible thread problem here */ |
| FontReader reader = null; |
| if (resolver != null) { |
| Source source = resolver.resolve(metricsFileName); |
| if (source == null) { |
| String err |
| = "Cannot load font: failed to create Source from metrics file " |
| + metricsFileName; |
| if (fail) { |
| throw new RuntimeException(err); |
| } else { |
| log.error(err); |
| } |
| return; |
| } |
| InputStream in = null; |
| if (source instanceof StreamSource) { |
| in = ((StreamSource) source).getInputStream(); |
| } |
| if (in == null && source.getSystemId() != null) { |
| in = new java.net.URL(source.getSystemId()).openStream(); |
| } |
| if (in == null) { |
| String err = "Cannot load font: After URI resolution, the returned" |
| + " Source object does not contain an InputStream" |
| + " or a valid URL (system identifier) for metrics file: " |
| + metricsFileName; |
| if (fail) { |
| throw new RuntimeException(err); |
| } else { |
| log.error(err); |
| } |
| return; |
| } |
| InputSource src = new InputSource(in); |
| src.setSystemId(source.getSystemId()); |
| reader = new FontReader(src); |
| } else { |
| reader = new FontReader(new InputSource( |
| new URL(metricsFileName).openStream())); |
| } |
| reader.setKerningEnabled(useKerning); |
| reader.setFontEmbedPath(fontEmbedPath); |
| reader.setResolver(resolver); |
| realFont = reader.getFont(); |
| } else { |
| if (fontEmbedPath == null) { |
| throw new RuntimeException("Cannot load font. No font URIs available."); |
| } |
| realFont = FontLoader.loadFont(fontEmbedPath, this.subFontName, resolver); |
| } |
| if (realFont instanceof FontDescriptor) { |
| realFontDescriptor = (FontDescriptor) realFont; |
| } |
| } catch (FOPException fopex) { |
| log.error("Failed to read font metrics file " + metricsFileName, fopex); |
| if (fail) { |
| throw new RuntimeException(fopex.getMessage()); |
| } |
| } catch (IOException ioex) { |
| log.error("Failed to read font metrics file " + metricsFileName, ioex); |
| if (fail) { |
| throw new RuntimeException(ioex.getMessage()); |
| } |
| } |
| realFont.setEventListener(this.eventListener); |
| isMetricsLoaded = true; |
| } |
| } |
| |
| /** |
| * Gets the real font. |
| * @return the real font |
| */ |
| public Typeface getRealFont() { |
| load(false); |
| return realFont; |
| } |
| |
| // ---- Font ---- |
| /** {@inheritDoc} */ |
| public String getEncodingName() { |
| load(true); |
| return realFont.getEncodingName(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public char mapChar(char c) { |
| load(true); |
| return realFont.mapChar(c); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public boolean hadMappingOperations() { |
| load(true); |
| return realFont.hadMappingOperations(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public boolean hasChar(char c) { |
| load(true); |
| return realFont.hasChar(c); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public boolean isMultiByte() { |
| load(true); |
| return realFont.isMultiByte(); |
| } |
| |
| // ---- FontMetrics interface ---- |
| /** {@inheritDoc} */ |
| public String getFontName() { |
| load(true); |
| return realFont.getFontName(); |
| } |
| |
| /** {@inheritDoc} */ |
| public String getEmbedFontName() { |
| load(true); |
| return realFont.getEmbedFontName(); |
| } |
| |
| /** {@inheritDoc} */ |
| public String getFullName() { |
| load(true); |
| return realFont.getFullName(); |
| } |
| |
| /** {@inheritDoc} */ |
| public Set getFamilyNames() { |
| load(true); |
| return realFont.getFamilyNames(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int getMaxAscent(int size) { |
| load(true); |
| return realFont.getMaxAscent(size); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int getAscender(int size) { |
| load(true); |
| return realFont.getAscender(size); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int getCapHeight(int size) { |
| load(true); |
| return realFont.getCapHeight(size); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int getDescender(int size) { |
| load(true); |
| return realFont.getDescender(size); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int getXHeight(int size) { |
| load(true); |
| return realFont.getXHeight(size); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int getWidth(int i, int size) { |
| load(true); |
| return realFont.getWidth(i, size); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int[] getWidths() { |
| load(true); |
| return realFont.getWidths(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public boolean hasKerningInfo() { |
| load(true); |
| return realFont.hasKerningInfo(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public Map getKerningInfo() { |
| load(true); |
| return realFont.getKerningInfo(); |
| } |
| |
| // ---- FontDescriptor interface ---- |
| /** |
| * {@inheritDoc} |
| */ |
| public int getCapHeight() { |
| load(true); |
| return realFontDescriptor.getCapHeight(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int getDescender() { |
| load(true); |
| return realFontDescriptor.getDescender(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int getAscender() { |
| load(true); |
| return realFontDescriptor.getAscender(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int getFlags() { |
| load(true); |
| return realFontDescriptor.getFlags(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int[] getFontBBox() { |
| load(true); |
| return realFontDescriptor.getFontBBox(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int getItalicAngle() { |
| load(true); |
| return realFontDescriptor.getItalicAngle(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int getStemV() { |
| load(true); |
| return realFontDescriptor.getStemV(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public FontType getFontType() { |
| load(true); |
| return realFontDescriptor.getFontType(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public boolean isEmbeddable() { |
| load(true); |
| return realFontDescriptor.isEmbeddable(); |
| } |
| |
| } |
| |