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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;
-
- import java.util.HashSet;
- import java.util.Set;
-
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
-
- import org.apache.xmlgraphics.fonts.Glyphs;
-
- /**
- * Base class for font classes
- */
- public abstract class Typeface implements FontMetrics {
-
- /**
- * Code point that is used if no code point for a specific character has
- * been found.
- */
- public static final char NOT_FOUND = '#';
-
- /** logger */
- private static Log log = LogFactory.getLog(Typeface.class);
-
- /**
- * Used to identify whether a font has been used (a character map operation
- * is used as the trigger). This could just as well be a boolean but is a
- * long out of statistical interest.
- */
- private long charMapOps;
-
- /** An optional event listener that receives events such as missing glyphs etc. */
- protected FontEventListener eventListener;
-
- private Set<Character> warnedChars;
-
- /**
- * Get the encoding of the font.
- * @return the encoding
- */
- public abstract String getEncodingName();
-
- /**
- * Map a Unicode character to a code point in the font.
- * @param c character to map
- * @return the mapped character
- */
- public abstract char mapChar(char c);
-
- /**
- * Used for keeping track of character mapping operations in order to determine if a font
- * was used at all or not.
- */
- protected void notifyMapOperation() {
- this.charMapOps++;
- }
-
- /**
- * Indicates whether this font had to do any character mapping operations. If that was
- * not the case, it's an indication that the font has never actually been used.
- * @return true if the font had to do any character mapping operations
- */
- public boolean hadMappingOperations() {
- return (this.charMapOps > 0);
- }
-
- /**
- * Determines whether this font contains a particular character/glyph.
- * @param c character to check
- * @return True if the character is supported, Falso otherwise
- */
- public abstract boolean hasChar(char c);
-
- /**
- * Determines whether the font is a multibyte font.
- * @return True if it is multibyte
- */
- public boolean isMultiByte() {
- return false;
- }
-
- public boolean isCID() {
- return getFontType() == FontType.TYPE1C;
- }
-
- /** {@inheritDoc} */
- public int getMaxAscent(int size) {
- return getAscender(size);
- }
-
- /** {@inheritDoc} */
- public boolean hasFeature(int tableType, String script, String language, String feature) {
- return false;
- }
-
- /**
- * Sets the font event listener that can be used to receive events about particular events
- * in this class.
- * @param listener the font event listener
- */
- public void setEventListener(FontEventListener listener) {
- this.eventListener = listener;
- }
-
- /**
- * Provide proper warning if a glyph is not available.
- *
- * @param c
- * the character which is missing.
- */
- protected void warnMissingGlyph(char c) {
- // Give up, character is not available
- Character ch = c;
- if (warnedChars == null) {
- warnedChars = new HashSet<Character>();
- }
- if (warnedChars.size() < 8 && !warnedChars.contains(ch)) {
- warnedChars.add(ch);
- if (this.eventListener != null) {
- this.eventListener.glyphNotAvailable(this, c, getFontName());
- } else {
- if (warnedChars.size() == 8) {
- log.warn("Many requested glyphs are not available in font "
- + getFontName());
- } else {
- log.warn("Glyph " + (int) c + " (0x"
- + Integer.toHexString(c) + ", "
- + Glyphs.charToGlyphName(c)
- + ") not available in font " + getFontName());
- }
- }
- }
- }
-
- /** {@inheritDoc} */
- public String toString() {
- StringBuffer sbuf = new StringBuffer(super.toString());
- sbuf.append('{');
- sbuf.append(getFullName());
- sbuf.append('}');
- return sbuf.toString();
- }
- }
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