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package org.unicode.cldr.util;
import java.io.File;
import java.util.Arrays;
import java.util.Collections;
import java.util.EnumMap;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Set;
import org.unicode.cldr.draft.ScriptMetadata;
import org.unicode.cldr.draft.ScriptMetadata.Info;
import org.unicode.cldr.draft.ScriptMetadata.Trinary;
import org.unicode.cldr.tool.LikelySubtags;
import org.unicode.cldr.util.SupplementalDataInfo.PluralType;
import com.ibm.icu.impl.Relation;
import com.ibm.icu.lang.UCharacter;
import com.ibm.icu.lang.UCharacterDirection;
import com.ibm.icu.lang.UScript;
import com.ibm.icu.text.UnicodeSet;
import com.ibm.icu.text.UnicodeSetIterator;
public class CoreCoverageInfo {
private static final CLDRConfig config = CLDRConfig.getInstance();
private static final String CLDR_BASE_DIRECTORY = config.getCldrBaseDirectory().toString();
private static final SupplementalDataInfo sdi = SupplementalDataInfo.getInstance();
private static final LikelySubtags ls = new LikelySubtags(sdi);
public enum CoreItems {
main_exemplar, auxiliary_exemplar, index_exemplar, orientation, plurals, ordinals, default_content, likely_subtags, country_data, romanization, casing, collation;
public static Set<CoreItems> ONLY_RECOMMENDED = Collections.unmodifiableSet(
EnumSet.of(romanization, ordinals));
public static final int COUNT = CoreItems.values().length;
}
public static Set<CoreItems> getCoreCoverageInfo(CLDRFile file, Set<String> detailedErrors) {
if (file.isResolved()) {
file = file.getUnresolved();
}
String locale = file.getLocaleID();
LanguageTagParser ltp = new LanguageTagParser();
locale = ltp.set(locale).getLanguageScript();
String baseLanguage = ltp.getLanguage();
String script = ltp.getScript();
Set<CoreItems> result = EnumSet.noneOf(CoreItems.class);
// (04) Exemplar sets: main, auxiliary, index, punctuation. [main/xxx.xml]
// These must reflect the Unicode model. For more information, see tr35-general.html#Character_Elements.
boolean isRtl = false;
for (CoreItems exemplar : EXEMPLARS) {
String type = exemplar.toString();
type = type.substring(0, type.indexOf('_'));
String path = "//ldml/characters/exemplarCharacters";
boolean isMain = type.equals("main");
if (!isMain) {
path += "[@type=\"" + type + "\"]";
}
String value = file.getStringValue(path);
if (value != null) {
String sourceLocale = file.getSourceLocaleID(path, null);
if (locale.equals(sourceLocale)) {
result.add(exemplar);
}
}
if (isMain && result.contains(exemplar)) {
UnicodeSet main = new UnicodeSet(value);
isRtl = isRtl(main);
}
}
// (02) Orientation (bidi writing systems only) [main/xxx.xml]
String path = "//ldml/layout/orientation/characterOrder";
String value = file.getStringValue(path);
if ("right-to-left".equals(value) == isRtl) {
result.add(CoreItems.orientation);
}
// (01) Plural rules [supplemental/plurals.xml and ordinals.xml]
// For more information, see cldr-spec/plural-rules.
if (sdi.getPluralLocales(PluralType.cardinal).contains(baseLanguage)) {
result.add(CoreItems.plurals);
}
if (sdi.getPluralLocales(PluralType.ordinal).contains(baseLanguage)) {
result.add(CoreItems.ordinals);
}
// (01) Default content script and region (normally: normally country with largest population using that language, and normal script for that). [supplemental/supplementalMetadata.xml]
String defaultContent = sdi.getDefaultContentLocale(locale);
if (defaultContent != null) {
result.add(CoreItems.default_content);
}
// likely subtags
String max = ls.maximize(locale);
String maxLangScript = null;
if (max != null) {
ltp.set(max);
maxLangScript = ltp.getLanguageScript();
script = ltp.getScript();
if (!script.isEmpty() && !ltp.getRegion().isEmpty()) {
result.add(CoreItems.likely_subtags);
}
}
// (N) Verify the country data ( i.e. which territories in which the language is spoken enough to create a locale ) [supplemental/supplementalData.xml]
// we verify that there is at least one region
// we try 3 cases: language, locale, maxLangScript
Set<String> territories = sdi.getTerritoriesForPopulationData(locale);
if (territories == null) {
territories = sdi.getTerritoriesForPopulationData(baseLanguage);
}
if (territories == null && maxLangScript != null) {
territories = sdi.getTerritoriesForPopulationData(maxLangScript);
}
if (territories != null && territories.size() != 0) {
result.add(CoreItems.country_data);
} else {
sdi.getTerritoriesForPopulationData(locale); // for debugging
}
// *(N) Romanization table (non-Latin writing systems only) [spreadsheet, we'll translate into transforms/xxx-en.xml]
// If a spreadsheet, for each letter (or sequence) in the exemplars, what is the corresponding Latin letter (or sequence).
// More sophisticated users can do a better job, supplying a file of rules like transforms/Arabic-Latin-BGN.xml.
if (script.equals("Latn")) {
result.add(CoreItems.romanization);
} else {
boolean found = false;
Set<String> scriptNames = getScriptNames(script);
Set<String> tempErrors = new HashSet<>();
for (String scriptName : scriptNames) {
for (String[] pair : ROMANIZATION_PATHS) {
String filename = pair[0] + scriptName + pair[1];
if (hasFile(SpecialDir.transforms, filename)) {
result.add(CoreItems.romanization);
found = true;
break;
} else {
tempErrors.add("No romanization for " + script + " => " + scriptName);
}
}
}
if (!found) {
detailedErrors.addAll(tempErrors);
}
}
// (N) Casing information (cased scripts only, according to ScriptMetadata.txt)
// This will be in common/casing
Info scriptData = ScriptMetadata.getInfo(script);
if (scriptData.hasCase == Trinary.YES) {
if (hasFile(SpecialDir.casing, baseLanguage)) {
result.add(CoreItems.casing);
}
} else {
result.add(CoreItems.casing);
}
// (N) Collation rules [non-Survey Tool]
// For details, see cldr-spec/collation-guidelines.
// The result will be a file like: common/collation/ar.xml or common/collation/da.xml.
// Note that the "search" collators (which tend to be large) are not needed initially.
// check for file cldr/collation/<language>.xml
if (hasFile(SpecialDir.collation, baseLanguage)) {
result.add(CoreItems.collation);
}
return Collections.unmodifiableSet(result);
}
private static final Set<CoreItems> EXEMPLARS = EnumSet.of(
CoreItems.main_exemplar,
CoreItems.auxiliary_exemplar,
CoreItems.index_exemplar);
private static final String[][] ROMANIZATION_PATHS = {
{ "", "-Latin" },
{ "", "-Latin-BGN" },
{ "Latin-", "" },
};
private static final Relation SCRIPT_NAMES = Relation.of(new HashMap(), HashSet.class);
static {
SCRIPT_NAMES.putAll("Arab", Arrays.asList("Arabic", "Arab"));
SCRIPT_NAMES.putAll("Jpan", Arrays.asList("Jpan", "Han"));
SCRIPT_NAMES.putAll("Hant", Arrays.asList("Hant", "Han"));
SCRIPT_NAMES.putAll("Hans", Arrays.asList("Hans", "Han"));
SCRIPT_NAMES.putAll("Kore", Arrays.asList("Hang", "Hangul"));
SCRIPT_NAMES.freeze();
}
private static Set<String> getScriptNames(String script) {
Set<String> result = SCRIPT_NAMES.get(script);
if (result != null) {
return result;
}
result = new HashSet();
String name = UScript.getName(UScript.getCodeFromName(script));
result.add(name);
result.add(script);
return result;
}
private enum SpecialDir {
transforms, collation, casing
}
private static final Relation<SpecialDir, String> SPECIAL_FILES = Relation.of(new EnumMap(SpecialDir.class), HashSet.class);
static {
for (SpecialDir dir : SpecialDir.values()) {
File realDir = new File(CLDR_BASE_DIRECTORY + "/common/" + dir);
for (String s : realDir.list()) {
if (s.endsWith(".xml")) {
s = s.substring(0, s.length() - 4);
}
SPECIAL_FILES.put(dir, s);
}
}
}
private static boolean hasFile(SpecialDir type, String filename) {
return SPECIAL_FILES.get(type).contains(filename);
}
public static boolean isRtl(UnicodeSet main) {
for (UnicodeSetIterator it = new UnicodeSetIterator(main); it.nextRange();) {
for (int i = it.codepoint; i <= it.codepointEnd; ++i) {
int bidiClass = UCharacter.getDirection(i);
switch (bidiClass) {
case UCharacterDirection.RIGHT_TO_LEFT:
case UCharacterDirection.RIGHT_TO_LEFT_ARABIC:
return true;
case UCharacterDirection.LEFT_TO_RIGHT:
return false;
}
}
}
return false;
}
}
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