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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.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
- // CSOFF: InnerAssignmentCheck
- // CSOFF: NoWhitespaceAfterCheck
-
- /**
- * <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); // CSOK: ConstantNameCheck
-
- /** 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 );
- }
- }
-
- }
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