| /* |
| * 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.Arrays; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| // CSOFF: LineLengthCheck |
| |
| /** |
| * <p>.Base class implementation of glyph coverage table.</p> |
| * |
| * <p>This work was originally authored by Glenn Adams (gadams@apache.org).</p> |
| */ |
| public final class GlyphCoverageTable extends GlyphMappingTable implements GlyphCoverageMapping { |
| |
| /* logging instance */ |
| private static final Log log = LogFactory.getLog(GlyphCoverageTable.class); |
| |
| /** empty mapping table */ |
| public static final int GLYPH_COVERAGE_TYPE_EMPTY = GLYPH_MAPPING_TYPE_EMPTY; |
| |
| /** mapped mapping table */ |
| public static final int GLYPH_COVERAGE_TYPE_MAPPED = GLYPH_MAPPING_TYPE_MAPPED; |
| |
| /** range based mapping table */ |
| public static final int GLYPH_COVERAGE_TYPE_RANGE = GLYPH_MAPPING_TYPE_RANGE; |
| |
| private GlyphCoverageMapping cm; |
| |
| private GlyphCoverageTable(GlyphCoverageMapping 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 getCoverageSize() { |
| return cm.getCoverageSize(); |
| } |
| |
| /** {@inheritDoc} */ |
| public int getCoverageIndex(int gid) { |
| return cm.getCoverageIndex(gid); |
| } |
| |
| /** |
| * Create glyph coverage table. |
| * @param entries list of mapped or ranged coverage entries, or null or empty list |
| * @return a new covera table instance |
| */ |
| public static GlyphCoverageTable createCoverageTable(List entries) { |
| GlyphCoverageMapping cm; |
| if ((entries == null) || (entries.size() == 0)) { |
| cm = new EmptyCoverageTable(entries); |
| } else if (isMappedCoverage(entries)) { |
| cm = new MappedCoverageTable(entries); |
| } else if (isRangeCoverage(entries)) { |
| cm = new RangeCoverageTable(entries); |
| } else { |
| cm = null; |
| } |
| assert cm != null : "unknown coverage type"; |
| return new GlyphCoverageTable(cm); |
| } |
| |
| private static boolean isMappedCoverage(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 isRangeCoverage(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 class EmptyCoverageTable extends GlyphMappingTable.EmptyMappingTable implements GlyphCoverageMapping { |
| public EmptyCoverageTable(List entries) { |
| super(entries); |
| } |
| /** {@inheritDoc} */ |
| public int getCoverageSize() { |
| return 0; |
| } |
| /** {@inheritDoc} */ |
| public int getCoverageIndex(int gid) { |
| return -1; |
| } |
| } |
| |
| private static class MappedCoverageTable extends GlyphMappingTable.MappedMappingTable implements GlyphCoverageMapping { |
| private int[] map; |
| public MappedCoverageTable(List entries) { |
| populate(entries); |
| } |
| /** {@inheritDoc} */ |
| public List getEntries() { |
| List entries = new java.util.ArrayList(); |
| if (map != null) { |
| for (int i = 0, n = map.length; i < n; i++) { |
| entries.add(Integer.valueOf(map [ i ])); |
| } |
| } |
| return entries; |
| } |
| /** {@inheritDoc} */ |
| public int getMappingSize() { |
| return (map != null) ? map.length : 0; |
| } |
| public int getMappedIndex(int gid) { |
| int i; |
| if ((i = Arrays.binarySearch(map, gid)) >= 0) { |
| return i; |
| } else { |
| return -1; |
| } |
| } |
| /** {@inheritDoc} */ |
| public int getCoverageSize() { |
| return getMappingSize(); |
| } |
| /** {@inheritDoc} */ |
| public int getCoverageIndex(int gid) { |
| return getMappedIndex(gid); |
| } |
| private void populate(List entries) { |
| int i = 0; |
| int skipped = 0; |
| int n = entries.size(); |
| int gidMax = -1; |
| int[] map = new int [ n ]; |
| for (Iterator it = entries.iterator(); it.hasNext();) { |
| Object o = it.next(); |
| if (o instanceof Integer) { |
| int gid = ((Integer) o) .intValue(); |
| if ((gid >= 0) && (gid < 65536)) { |
| if (gid > gidMax) { |
| map [ i++ ] = gidMax = gid; |
| } else { |
| log.info("ignoring out of order or duplicate glyph index: " + gid); |
| skipped++; |
| } |
| } else { |
| throw new AdvancedTypographicTableFormatException("illegal glyph index: " + gid); |
| } |
| } else { |
| throw new AdvancedTypographicTableFormatException("illegal coverage entry, must be Integer: " + o); |
| } |
| } |
| assert (i + skipped) == n; |
| assert this.map == null; |
| this.map = map; |
| } |
| /** {@inheritDoc} */ |
| public String toString() { |
| StringBuffer sb = new StringBuffer(); |
| sb.append('{'); |
| for (int i = 0, n = map.length; i < n; i++) { |
| if (i > 0) { |
| sb.append(','); |
| } |
| sb.append(Integer.toString(map [ i ])); |
| } |
| sb.append('}'); |
| return sb.toString(); |
| } |
| } |
| |
| private static class RangeCoverageTable extends GlyphMappingTable.RangeMappingTable implements GlyphCoverageMapping { |
| public RangeCoverageTable(List entries) { |
| super(entries); |
| } |
| /** {@inheritDoc} */ |
| public int getMappedIndex(int gid, int s, int m) { |
| return m + gid - s; |
| } |
| /** {@inheritDoc} */ |
| public int getCoverageSize() { |
| return getMappingSize(); |
| } |
| /** {@inheritDoc} */ |
| public int getCoverageIndex(int gid) { |
| return getMappedIndex(gid); |
| } |
| } |
| |
| } |