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- /*
- * 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.autodetect;
-
- import java.io.File;
- import java.net.MalformedURLException;
- import java.util.List;
-
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
- import org.apache.fop.fonts.CachedFontInfo;
- import org.apache.fop.fonts.CustomFont;
- import org.apache.fop.fonts.EmbedFontInfo;
- import org.apache.fop.fonts.Font;
- import org.apache.fop.fonts.FontCache;
- import org.apache.fop.fonts.FontLoader;
- import org.apache.fop.fonts.FontResolver;
- import org.apache.fop.fonts.FontTriplet;
-
- /**
- * Attempts to determine correct FontInfo
- */
- public class FontInfoFinder {
-
- /** logging instance */
- private Log log = LogFactory.getLog(FontInfoFinder.class);
-
- /** font constituent names which identify a font as being of "italic" style */
- private static final String[] ITALIC_WORDS = {"italic", "oblique"};
-
- /** font constituent names which identify a font as being of "bold" weight */
- private static final String[] BOLD_WORDS = {"bold", "black", "heavy", "ultra", "super"};
-
- /**
- * Attempts to determine FontTriplet from a given CustomFont.
- * It seems to be fairly accurate but will probably require some tweaking over time
- *
- * @param customFont CustomFont
- * @return newly created font triplet
- */
- private FontTriplet tripletFromFont(CustomFont customFont) {
- // default style and weight triplet vales (fallback)
- String name = customFont.getStrippedFontName();
- String subName = customFont.getFontSubName();
- String searchName = name.toLowerCase();
- if (subName != null) {
- searchName += subName.toLowerCase();
- }
-
- // style
- String style = Font.STYLE_NORMAL;
- if (customFont.getItalicAngle() > 0) {
- style = Font.STYLE_ITALIC;
- } else {
- for (int i = 0; i < ITALIC_WORDS.length; i++) {
- if (searchName.indexOf(ITALIC_WORDS[i]) != -1) {
- style = Font.STYLE_ITALIC;
- break;
- }
- }
- }
-
- // weight
- int weight = Font.WEIGHT_NORMAL;
- for (int i = 0; i < BOLD_WORDS.length; i++) {
- if (searchName.indexOf(BOLD_WORDS[i]) != -1) {
- weight = Font.WEIGHT_BOLD;
- break;
- }
- }
- return new FontTriplet(name, style, weight);
- }
-
- /**
- * Attempts to determine FontInfo from a given custom font
- * @param fontFile the font file
- * @param customFont the custom font
- * @param fontCache font cache (may be null)
- * @return
- */
- private EmbedFontInfo fontInfoFromCustomFont(
- File fontFile, CustomFont customFont, FontCache fontCache) {
- FontTriplet fontTriplet = tripletFromFont(customFont);
- List fontTripletList = new java.util.ArrayList();
- fontTripletList.add(fontTriplet);
- String embedUrl;
- try {
- embedUrl = fontFile.toURL().toExternalForm();
- } catch (MalformedURLException e) {
- embedUrl = fontFile.getAbsolutePath();
- }
- EmbedFontInfo fontInfo = new EmbedFontInfo(null, customFont.isKerningEnabled(),
- fontTripletList, embedUrl);
- if (fontCache != null) {
- fontCache.addFont(fontInfo);
- }
- return fontInfo;
- }
-
- /**
- * Attempts to determine EmbedFontInfo from a given font file.
- *
- * @param fontFile font file
- * @param resolver font resolver used to resolve font
- * @param fontCache font cache (may be null)
- * @return newly created embed font info
- */
- public EmbedFontInfo find(File fontFile, FontResolver resolver, FontCache fontCache) {
- String embedUrl = null;
- try {
- embedUrl = fontFile.toURL().toExternalForm();
- } catch (MalformedURLException mfue) {
- // should never happen
- log.error("Failed to convert '" + fontFile + "' to URL: " + mfue.getMessage() );
- }
-
- long fileLastModified = -1;
- if (fontCache != null) {
- fileLastModified = fontFile.lastModified();
- // firstly try and fetch it from cache before loading/parsing the font file
- if (fontCache.containsFont(embedUrl)) {
- CachedFontInfo fontInfo = fontCache.getFont(embedUrl);
- if (fontInfo.lastModified() == fileLastModified) {
- return fontInfo;
- } else {
- // out of date cache item
- fontCache.removeFont(embedUrl);
- }
- // is this a previously failed parsed font?
- } else if (fontCache.isFailedFont(embedUrl, fileLastModified)) {
- if (log.isDebugEnabled()) {
- log.debug("Skipping font file that failed to load previously: " + embedUrl);
- }
- return null;
- }
- }
-
- // try to determine triplet information from font file
- CustomFont customFont = null;
- try {
- customFont = FontLoader.loadFont(fontFile, resolver);
- } catch (Exception e) {
- //TODO Too verbose (it's an error but we don't care if some fonts can't be loaded)
- if (log.isErrorEnabled()) {
- log.error("Unable to load font file: " + embedUrl + ". Reason: " + e.getMessage());
- }
- if (fontCache != null) {
- fontCache.registerFailedFont(embedUrl, fileLastModified);
- }
- return null;
- }
- return fontInfoFromCustomFont(fontFile, customFont, fontCache);
- }
- }
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