jars/icu4j-52_1/tools/misc/src/com/ibm/icu/dev/tool/layout/ScriptList.java

   1 /*
   2  *******************************************************************************
   3  * Copyright (C) 1998-2004, International Business Machines Corporation and    *
   4  * others. All Rights Reserved.                                                *
   5  *******************************************************************************
   6  *
   7  * Created on Dec 3, 2003
   8  *
   9  *******************************************************************************
  10  */
  11 package com.ibm.icu.dev.tool.layout;
  12
  13
  14 public class ScriptList
  15 {
  16     static class LangSysRecord extends TaggedRecord
  17     {
  18         private Feature[] features;
  19         private int featureCount;
  20
  21         public LangSysRecord(String theLanguageTag)
  22         {
  23             super(theLanguageTag);
  24
  25             features = new Feature[10];
  26             featureCount = 0;
  27         }
  28
  29         public void addFeature(Feature feature)
  30         {
  31             if (featureCount > features.length) {
  32                 Feature[] newFeatures = new Feature[features.length + 5];
  33
  34                 System.arraycopy(features, 0, newFeatures, 0, features.length);
  35                 features = newFeatures;
  36             }
  37
  38             features[featureCount++] = feature;
  39         }
  40
  41          public void writeLangSysRecord(OpenTypeTableWriter writer)
  42         {
  43             writer.writeData(0);      // lookupOrder (must be NULL)
  44             writer.writeData(0xFFFF); // reqFeatureIndex (0xFFFF means none)
  45
  46             writer.writeData(featureCount);
  47
  48             for (int i = 0; i < featureCount; i += 1) {
  49                 writer.writeData(features[i].getFeatureIndex());
  50             }
  51         }
  52     }
  53
  54     static class ScriptRecord extends TaggedRecord
  55     {
  56         private LangSysRecord[] langSysRecords;
  57         private int langSysCount;
  58
  59         public ScriptRecord(String theScriptTag)
  60         {
  61             super(theScriptTag);
  62             langSysRecords = new LangSysRecord[10];
  63             langSysCount = 0;
  64         }
  65
  66         public LangSysRecord findLangSysRecord(String languageTag)
  67         {
  68             for (int i = 0; i < langSysCount; i += 1) {
  69                 LangSysRecord langSysRecord = langSysRecords[i];
  70
  71                 if (langSysRecord.getTag().equals(languageTag)) {
  72                     return langSysRecord;
  73                 }
  74             }
  75
  76             if (langSysCount >= langSysRecords.length) {
  77                 LangSysRecord[] newLangSysRecords = new LangSysRecord[langSysCount + 5];
  78
  79                 System.arraycopy(langSysRecords, 0, newLangSysRecords, 0, langSysRecords.length);
  80                 langSysRecords = newLangSysRecords;
  81             }
  82
  83             LangSysRecord newLangSysRecord = new LangSysRecord(languageTag);
  84             langSysRecords[langSysCount] = newLangSysRecord;
  85
  86             langSysCount += 1;
  87             return newLangSysRecord;
  88         }
  89
  90         public void writeScriptRecord(OpenTypeTableWriter writer)
  91         {
  92             TaggedRecord.sort(langSysRecords, langSysCount);
  93
  94             int scriptTableBase = writer.getOutputIndex();
  95             int firstLangSys = 0;
  96
  97             writer.writeData(0); // default langSys offset (fixed later)
  98
  99             if (langSysRecords[0].getTag().equals("(default)")) {
 100                 firstLangSys = 1;
 101             }
 102
 103             writer.writeData(langSysCount - firstLangSys);
 104
 105             int langSysOffset = writer.getOutputIndex();
 106
 107             for (int i = firstLangSys; i < langSysCount; i += 1) {
 108                 writer.writeTag(langSysRecords[i].getTag());
 109                 writer.writeData(0);
 110             }
 111
 112             if (firstLangSys > 0) {
 113                 System.out.print(" (default)");
 114                 writer.fixOffset(scriptTableBase, scriptTableBase);
 115                 langSysRecords[0].writeLangSysRecord(writer);
 116             }
 117
 118             for (int i = firstLangSys; i < langSysCount; i += 1) {
 119                 // fix the offset in the langSysRecordArray.
 120                 // The "+2" skips over the tag and the "+3"
 121                 // skips to the next langSysRecord entry
 122                 writer.fixOffset(langSysOffset + 2, scriptTableBase);
 123                 langSysOffset += 3;
 124
 125                 System.out.print(" '" + langSysRecords[i].getTag() + "'");
 126                 langSysRecords[i].writeLangSysRecord(writer);
 127             }
 128         }
 129     }
 130
 131     private ScriptRecord[] scriptRecords;
 132     private int scriptCount;
 133
 134     public ScriptList()
 135     {
 136         scriptRecords = new ScriptRecord[10];
 137         scriptCount = 0;
 138     }
 139
 140     private LangSysRecord findLangSysRecord(String scriptTag, String languageTag)
 141     {
 142         for (int i = 0; i < scriptCount; i += 1) {
 143             ScriptRecord scriptRecord = scriptRecords[i];
 144
 145             if (scriptRecord.getTag().equals(scriptTag)) {
 146                  return scriptRecord.findLangSysRecord(languageTag);
 147             }
 148         }
 149
 150         if (scriptCount >= scriptRecords.length) {
 151             ScriptRecord[] newScriptRecords = new ScriptRecord[scriptCount + 5];
 152
 153             System.arraycopy(scriptRecords, 0, newScriptRecords, 0, scriptRecords.length);
 154             scriptRecords = newScriptRecords;
 155         }
 156
 157         ScriptRecord newScriptRecord = new ScriptRecord(scriptTag);
 158         scriptRecords[scriptCount] = newScriptRecord;
 159
 160         scriptCount += 1;
 161         return newScriptRecord.findLangSysRecord(languageTag);
 162     }
 163
 164     public void addFeature(String scriptTag, String languageTag, Feature feature)
 165     {
 166         LangSysRecord langSysRecord = findLangSysRecord(scriptTag, languageTag);
 167
 168         langSysRecord.addFeature(feature);
 169     }
 170
 171     public void writeScriptList(OpenTypeTableWriter writer)
 172     {
 173         System.out.println("writing script list...");
 174
 175         int scriptListBase = writer.getOutputIndex();
 176
 177         TaggedRecord.sort(scriptRecords, scriptCount);
 178         writer.writeData(scriptCount);
 179
 180         int scriptRecordOffset = writer.getOutputIndex();
 181
 182         for (int i = 0; i < scriptCount; i += 1) {
 183             writer.writeTag(scriptRecords[i].getTag());
 184             writer.writeData(0);
 185         }
 186
 187         for (int i = 0; i < scriptCount; i += 1) {
 188             // fix the offset in the scriptRecordArray.
 189             // The "+2" skips over the tag and the "+3"
 190             // skips to the next scriptRecord entry
 191             writer.fixOffset(scriptRecordOffset + 2, scriptListBase);
 192             scriptRecordOffset += 3;
 193
 194             System.out.print("  script '" + scriptRecords[i].getTag() + "':");
 195             scriptRecords[i].writeScriptRecord(writer);
 196             System.out.println();
 197         }
 198     }
 199 }
 200