| /* |
| * 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.scripts; |
| |
| import org.apache.fop.complexscripts.fonts.GlyphDefinitionTable; |
| import org.apache.fop.complexscripts.util.GlyphSequence; |
| import org.apache.fop.complexscripts.util.ScriptContextTester; |
| |
| // CSOFF: LineLengthCheck |
| |
| /** |
| * <p>Default script processor, which enables default glyph composition/decomposition, common ligatures, localized forms |
| * and kerning.</p> |
| * |
| * <p>This work was originally authored by Glenn Adams (gadams@apache.org).</p> |
| */ |
| public class DefaultScriptProcessor extends ScriptProcessor { |
| |
| /** features to use for substitutions */ |
| private static final String[] GSUB_FEATURES = |
| { |
| "ccmp", // glyph composition/decomposition |
| "liga", // common ligatures |
| "locl" // localized forms |
| }; |
| |
| /** features to use for positioning */ |
| private static final String[] GPOS_FEATURES = |
| { |
| "kern", // kerning |
| "mark", // mark to base or ligature positioning |
| "mkmk" // mark to mark positioning |
| }; |
| |
| DefaultScriptProcessor(String script) { |
| super(script); |
| } |
| |
| @Override |
| /** {@inheritDoc} */ |
| public String[] getSubstitutionFeatures() { |
| return GSUB_FEATURES; |
| } |
| |
| @Override |
| /** {@inheritDoc} */ |
| public ScriptContextTester getSubstitutionContextTester() { |
| return null; |
| } |
| |
| @Override |
| /** {@inheritDoc} */ |
| public String[] getPositioningFeatures() { |
| return GPOS_FEATURES; |
| } |
| |
| @Override |
| /** {@inheritDoc} */ |
| public ScriptContextTester getPositioningContextTester() { |
| return null; |
| } |
| |
| @Override |
| /** {@inheritDoc} */ |
| public GlyphSequence reorderCombiningMarks(GlyphDefinitionTable gdef, GlyphSequence gs, int[][] gpa, String script, String language) { |
| int ng = gs.getGlyphCount(); |
| int[] ga = gs.getGlyphArray(false); |
| int nm = 0; |
| // count combining marks |
| for (int i = 0; i < ng; i++) { |
| int gid = ga [ i ]; |
| if (gdef.isGlyphClass(gid, GlyphDefinitionTable.GLYPH_CLASS_MARK)) { |
| nm++; |
| } |
| } |
| // only reorder if there is at least one mark and at least one non-mark glyph |
| if ((nm > 0) && ((ng - nm) > 0)) { |
| GlyphSequence.CharAssociation[] aa = gs.getAssociations(0, -1); |
| int[] nga = new int [ ng ]; |
| int[][] npa = (gpa != null) ? new int [ ng ][] : null; |
| GlyphSequence.CharAssociation[] naa = new GlyphSequence.CharAssociation [ ng ]; |
| int k = 0; |
| GlyphSequence.CharAssociation ba = null; |
| int bg = -1; |
| int[] bpa = null; |
| for (int i = 0; i < ng; i++) { |
| int gid = ga [ i ]; |
| int[] pa = (gpa != null) ? gpa [ i ] : null; |
| GlyphSequence.CharAssociation ca = aa [ i ]; |
| if (gdef.isGlyphClass(gid, GlyphDefinitionTable.GLYPH_CLASS_MARK)) { |
| nga [ k ] = gid; |
| naa [ k ] = ca; |
| if (npa != null) { |
| npa [ k ] = pa; |
| } |
| k++; |
| } else { |
| if (bg != -1) { |
| nga [ k ] = bg; |
| naa [ k ] = ba; |
| if (npa != null) { |
| npa [ k ] = bpa; |
| } |
| k++; |
| bg = -1; |
| ba = null; |
| bpa = null; |
| } |
| if (bg == -1) { |
| bg = gid; |
| ba = ca; |
| bpa = pa; |
| } |
| } |
| } |
| if (bg != -1) { |
| nga [ k ] = bg; |
| naa [ k ] = ba; |
| if (npa != null) { |
| npa [ k ] = bpa; |
| } |
| k++; |
| } |
| assert k == ng; |
| if (npa != null) { |
| System.arraycopy(npa, 0, gpa, 0, ng); |
| } |
| return new GlyphSequence(gs, null, nga, null, null, naa, null); |
| } else { |
| return gs; |
| } |
| } |
| |
| } |