| /* |
| * 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.complexscripts.fonts; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| |
| // CSOFF: LineLengthCheck |
| |
| /** |
| * <p>Base class implementation of glyph class table.</p> |
| * |
| * <p>This work was originally authored by Glenn Adams (gadams@apache.org).</p> |
| */ |
| public final class GlyphClassTable extends GlyphMappingTable implements GlyphClassMapping { |
| |
| /** empty mapping table */ |
| public static final int GLYPH_CLASS_TYPE_EMPTY = GLYPH_MAPPING_TYPE_EMPTY; |
| |
| /** mapped mapping table */ |
| public static final int GLYPH_CLASS_TYPE_MAPPED = GLYPH_MAPPING_TYPE_MAPPED; |
| |
| /** range based mapping table */ |
| public static final int GLYPH_CLASS_TYPE_RANGE = GLYPH_MAPPING_TYPE_RANGE; |
| |
| /** empty mapping table */ |
| public static final int GLYPH_CLASS_TYPE_COVERAGE_SET = 3; |
| |
| private GlyphClassMapping cm; |
| |
| private GlyphClassTable(GlyphClassMapping cm) { |
| assert cm != null; |
| assert cm instanceof GlyphMappingTable; |
| this.cm = cm; |
| } |
| |
| /** {@inheritDoc} */ |
| public int getType() { |
| return ((GlyphMappingTable) cm) .getType(); |
| } |
| |
| /** {@inheritDoc} */ |
| public List getEntries() { |
| return ((GlyphMappingTable) cm) .getEntries(); |
| } |
| |
| /** {@inheritDoc} */ |
| public int getClassSize(int set) { |
| return cm.getClassSize(set); |
| } |
| |
| /** {@inheritDoc} */ |
| public int getClassIndex(int gid, int set) { |
| return cm.getClassIndex(gid, set); |
| } |
| |
| /** |
| * Create glyph class table. |
| * @param entries list of mapped or ranged class entries, or null or empty list |
| * @return a new covera table instance |
| */ |
| public static GlyphClassTable createClassTable(List entries) { |
| GlyphClassMapping cm; |
| if ((entries == null) || (entries.size() == 0)) { |
| cm = new EmptyClassTable(entries); |
| } else if (isMappedClass(entries)) { |
| cm = new MappedClassTable(entries); |
| } else if (isRangeClass(entries)) { |
| cm = new RangeClassTable(entries); |
| } else if (isCoverageSetClass(entries)) { |
| cm = new CoverageSetClassTable(entries); |
| } else { |
| cm = null; |
| } |
| assert cm != null : "unknown class type"; |
| return new GlyphClassTable(cm); |
| } |
| |
| private static boolean isMappedClass(List entries) { |
| if ((entries == null) || (entries.size() == 0)) { |
| return false; |
| } else { |
| for (Iterator it = entries.iterator(); it.hasNext();) { |
| Object o = it.next(); |
| if (!(o instanceof Integer)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| } |
| |
| private static boolean isRangeClass(List entries) { |
| if ((entries == null) || (entries.size() == 0)) { |
| return false; |
| } else { |
| for (Iterator it = entries.iterator(); it.hasNext();) { |
| Object o = it.next(); |
| if (!(o instanceof MappingRange)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| } |
| |
| private static boolean isCoverageSetClass(List entries) { |
| if ((entries == null) || (entries.size() == 0)) { |
| return false; |
| } else { |
| for (Iterator it = entries.iterator(); it.hasNext();) { |
| Object o = it.next(); |
| if (!(o instanceof GlyphCoverageTable)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| } |
| |
| private static class EmptyClassTable extends GlyphMappingTable.EmptyMappingTable implements GlyphClassMapping { |
| public EmptyClassTable(List entries) { |
| super(entries); |
| } |
| /** {@inheritDoc} */ |
| public int getClassSize(int set) { |
| return 0; |
| } |
| /** {@inheritDoc} */ |
| public int getClassIndex(int gid, int set) { |
| return -1; |
| } |
| } |
| |
| private static class MappedClassTable extends GlyphMappingTable.MappedMappingTable implements GlyphClassMapping { |
| private int firstGlyph; |
| private int[] gca; |
| private int gcMax = -1; |
| public MappedClassTable(List entries) { |
| populate(entries); |
| } |
| /** {@inheritDoc} */ |
| public List getEntries() { |
| List entries = new java.util.ArrayList(); |
| entries.add(Integer.valueOf(firstGlyph)); |
| if (gca != null) { |
| for (int i = 0, n = gca.length; i < n; i++) { |
| entries.add(Integer.valueOf(gca [ i ])); |
| } |
| } |
| return entries; |
| } |
| /** {@inheritDoc} */ |
| public int getMappingSize() { |
| return gcMax + 1; |
| } |
| /** {@inheritDoc} */ |
| public int getMappedIndex(int gid) { |
| int i = gid - firstGlyph; |
| if ((i >= 0) && (i < gca.length)) { |
| return gca [ i ]; |
| } else { |
| return -1; |
| } |
| } |
| /** {@inheritDoc} */ |
| public int getClassSize(int set) { |
| return getMappingSize(); |
| } |
| /** {@inheritDoc} */ |
| public int getClassIndex(int gid, int set) { |
| return getMappedIndex(gid); |
| } |
| private void populate(List entries) { |
| // obtain entries iterator |
| Iterator it = entries.iterator(); |
| // extract first glyph |
| int firstGlyph = 0; |
| if (it.hasNext()) { |
| Object o = it.next(); |
| if (o instanceof Integer) { |
| firstGlyph = ((Integer) o) .intValue(); |
| } else { |
| throw new AdvancedTypographicTableFormatException("illegal entry, first entry must be Integer denoting first glyph value, but is: " + o); |
| } |
| } |
| // extract glyph class array |
| int i = 0; |
| int n = entries.size() - 1; |
| int gcMax = -1; |
| int[] gca = new int [ n ]; |
| while (it.hasNext()) { |
| Object o = it.next(); |
| if (o instanceof Integer) { |
| int gc = ((Integer) o) .intValue(); |
| gca [ i++ ] = gc; |
| if (gc > gcMax) { |
| gcMax = gc; |
| } |
| } else { |
| throw new AdvancedTypographicTableFormatException("illegal mapping entry, must be Integer: " + o); |
| } |
| } |
| assert i == n; |
| assert this.gca == null; |
| this.firstGlyph = firstGlyph; |
| this.gca = gca; |
| this.gcMax = gcMax; |
| } |
| /** {@inheritDoc} */ |
| public String toString() { |
| StringBuffer sb = new StringBuffer(); |
| sb.append("{ firstGlyph = " + firstGlyph + ", classes = {"); |
| for (int i = 0, n = gca.length; i < n; i++) { |
| if (i > 0) { |
| sb.append(','); |
| } |
| sb.append(Integer.toString(gca [ i ])); |
| } |
| sb.append("} }"); |
| return sb.toString(); |
| } |
| } |
| |
| private static class RangeClassTable extends GlyphMappingTable.RangeMappingTable implements GlyphClassMapping { |
| public RangeClassTable(List entries) { |
| super(entries); |
| } |
| /** {@inheritDoc} */ |
| public int getMappedIndex(int gid, int s, int m) { |
| return m; |
| } |
| /** {@inheritDoc} */ |
| public int getClassSize(int set) { |
| return getMappingSize(); |
| } |
| /** {@inheritDoc} */ |
| public int getClassIndex(int gid, int set) { |
| return getMappedIndex(gid); |
| } |
| } |
| |
| private static class CoverageSetClassTable extends GlyphMappingTable.EmptyMappingTable implements GlyphClassMapping { |
| public CoverageSetClassTable(List entries) { |
| throw new UnsupportedOperationException("coverage set class table not yet supported"); |
| } |
| /** {@inheritDoc} */ |
| public int getType() { |
| return GLYPH_CLASS_TYPE_COVERAGE_SET; |
| } |
| /** {@inheritDoc} */ |
| public int getClassSize(int set) { |
| return 0; |
| } |
| /** {@inheritDoc} */ |
| public int getClassIndex(int gid, int set) { |
| return -1; |
| } |
| } |
| |
| } |