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[SD1] Move script-related methods to a new utils class. 

Bug: 15840116
Change-Id: I3a2a9c41e40590c0116c7885a49c6fa308ed8f44
Jean Chalard 2014-06-26 13:07:49 +09:00
parent 5961f2dfac
commit 289299bf66
3 changed files with 112 additions and 86 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
java/src/com/android/inputmethod/latin/spellcheck/AndroidSpellCheckerService.java
View File

@ -37,6 +37,7 @@ import com.android.inputmethod.latin.utils.AdditionalSubtypeUtils;
import com.android.inputmethod.latin.utils.BinaryDictionaryUtils;
import com.android.inputmethod.latin.utils.CollectionUtils;
import com.android.inputmethod.latin.utils.LocaleUtils;
import com.android.inputmethod.latin.utils.ScriptUtils;
import com.android.inputmethod.latin.utils.StringUtils;
import java.lang.ref.WeakReference;
@ -78,40 +79,8 @@ public final class AndroidSpellCheckerService extends SpellCheckerService
private final HashSet<WeakReference<DictionaryCollection>> mDictionaryCollectionsList =
new HashSet<>();
public static final int SCRIPT_LATIN = 0;
public static final int SCRIPT_CYRILLIC = 1;
public static final int SCRIPT_GREEK = 2;
public static final String SINGLE_QUOTE = "\u0027";
public static final String APOSTROPHE = "\u2019";
private static final TreeMap<String, Integer> mLanguageToScript;
static {
// List of the supported languages and their associated script. We won't check
// words written in another script than the selected script, because we know we
// don't have those in our dictionary so we will underline everything and we
// will never have any suggestions, so it makes no sense checking them, and this
// is done in {@link #shouldFilterOut}. Also, the script is used to choose which
// proximity to pass to the dictionary descent algorithm.
// IMPORTANT: this only contains languages - do not write countries in there.
// Only the language is searched from the map.
mLanguageToScript = new TreeMap<>();
mLanguageToScript.put("cs", SCRIPT_LATIN);
mLanguageToScript.put("da", SCRIPT_LATIN);
mLanguageToScript.put("de", SCRIPT_LATIN);
mLanguageToScript.put("el", SCRIPT_GREEK);
mLanguageToScript.put("en", SCRIPT_LATIN);
mLanguageToScript.put("es", SCRIPT_LATIN);
mLanguageToScript.put("fi", SCRIPT_LATIN);
mLanguageToScript.put("fr", SCRIPT_LATIN);
mLanguageToScript.put("hr", SCRIPT_LATIN);
mLanguageToScript.put("it", SCRIPT_LATIN);
mLanguageToScript.put("lt", SCRIPT_LATIN);
mLanguageToScript.put("lv", SCRIPT_LATIN);
mLanguageToScript.put("nb", SCRIPT_LATIN);
mLanguageToScript.put("nl", SCRIPT_LATIN);
mLanguageToScript.put("pt", SCRIPT_LATIN);
mLanguageToScript.put("sl", SCRIPT_LATIN);
mLanguageToScript.put("ru", SCRIPT_CYRILLIC);
}
@Override public void onCreate() {
super.onCreate();
@ -122,22 +91,13 @@ public final class AndroidSpellCheckerService extends SpellCheckerService
onSharedPreferenceChanged(prefs, PREF_USE_CONTACTS_KEY);
}
public static int getScriptFromLocale(final Locale locale) {
final Integer script = mLanguageToScript.get(locale.getLanguage());
if (null == script) {
throw new RuntimeException("We have been called with an unsupported language: \""
+ locale.getLanguage() + "\". Framework bug?");
}
return script;
}
private static String getKeyboardLayoutNameForScript(final int script) {
switch (script) {
case AndroidSpellCheckerService.SCRIPT_LATIN:
case ScriptUtils.SCRIPT_LATIN:
return "qwerty";
case AndroidSpellCheckerService.SCRIPT_CYRILLIC:
case ScriptUtils.SCRIPT_CYRILLIC:
return "east_slavic";
case AndroidSpellCheckerService.SCRIPT_GREEK:
case ScriptUtils.SCRIPT_GREEK:
return "greek";
default:
throw new RuntimeException("Wrong script supplied: " + script);
@ -413,7 +373,7 @@ public final class AndroidSpellCheckerService extends SpellCheckerService
}
public DictAndKeyboard createDictAndKeyboard(final Locale locale) {
final int script = getScriptFromLocale(locale);
final int script = ScriptUtils.getScriptFromLocale(locale);
final String keyboardLayoutName = getKeyboardLayoutNameForScript(script);
final InputMethodSubtype subtype = AdditionalSubtypeUtils.createAdditionalSubtype(
locale.toString(), keyboardLayoutName, null);

45
java/src/com/android/inputmethod/latin/spellcheck/AndroidWordLevelSpellCheckerSession.java
View File

@ -36,6 +36,7 @@ import com.android.inputmethod.latin.WordComposer;
import com.android.inputmethod.latin.spellcheck.AndroidSpellCheckerService.SuggestionsGatherer;
import com.android.inputmethod.latin.utils.CoordinateUtils;
import com.android.inputmethod.latin.utils.LocaleUtils;
import com.android.inputmethod.latin.utils.ScriptUtils;
import com.android.inputmethod.latin.utils.StringUtils;
import java.util.ArrayList;
@ -116,7 +117,7 @@ public abstract class AndroidWordLevelSpellCheckerSession extends Session {
final String localeString = getLocale();
mDictionaryPool = mService.getDictionaryPool(localeString);
mLocale = LocaleUtils.constructLocaleFromString(localeString);
mScript = AndroidSpellCheckerService.getScriptFromLocale(mLocale);
mScript = ScriptUtils.getScriptFromLocale(mLocale);
}
@Override
@ -125,44 +126,6 @@ public abstract class AndroidWordLevelSpellCheckerSession extends Session {
cres.unregisterContentObserver(mObserver);
}
/*
* Returns whether the code point is a letter that makes sense for the specified
* locale for this spell checker.
* The dictionaries supported by Latin IME are described in res/xml/spellchecker.xml
* and is limited to EFIGS languages and Russian.
* Hence at the moment this explicitly tests for Cyrillic characters or Latin characters
* as appropriate, and explicitly excludes CJK, Arabic and Hebrew characters.
*/
private static boolean isLetterCheckableByLanguage(final int codePoint,
final int script) {
switch (script) {
case AndroidSpellCheckerService.SCRIPT_LATIN:
// Our supported latin script dictionaries (EFIGS) at the moment only include
// characters in the C0, C1, Latin Extended A and B, IPA extensions unicode
// blocks. As it happens, those are back-to-back in the code range 0x40 to 0x2AF,
// so the below is a very efficient way to test for it. As for the 0-0x3F, it's
// excluded from isLetter anyway.
return codePoint <= 0x2AF && Character.isLetter(codePoint);
case AndroidSpellCheckerService.SCRIPT_CYRILLIC:
// All Cyrillic characters are in the 400~52F block. There are some in the upper
// Unicode range, but they are archaic characters that are not used in modern
// Russian and are not used by our dictionary.
return codePoint >= 0x400 && codePoint <= 0x52F && Character.isLetter(codePoint);
case AndroidSpellCheckerService.SCRIPT_GREEK:
// Greek letters are either in the 370~3FF range (Greek & Coptic), or in the
// 1F00~1FFF range (Greek extended). Our dictionary contains both sort of characters.
// Our dictionary also contains a few words with 0xF2; it would be best to check
// if that's correct, but a web search does return results for these words so
// they are probably okay.
return (codePoint >= 0x370 && codePoint <= 0x3FF)
|| (codePoint >= 0x1F00 && codePoint <= 0x1FFF)
|| codePoint == 0xF2;
default:
// Should never come here
throw new RuntimeException("Impossible value of script: " + script);
}
}
private static final int CHECKABILITY_CHECKABLE = 0;
private static final int CHECKABILITY_TOO_MANY_NON_LETTERS = 1;
private static final int CHECKABILITY_CONTAINS_PERIOD = 2;
@ -189,7 +152,7 @@ public abstract class AndroidWordLevelSpellCheckerSession extends Session {
// Filter by first letter
final int firstCodePoint = text.codePointAt(0);
// Filter out words that don't start with a letter or an apostrophe
if (!isLetterCheckableByLanguage(firstCodePoint, script)
if (!ScriptUtils.isLetterCheckableByScript(firstCodePoint, script)
&& '\'' != firstCodePoint) return CHECKABILITY_FIRST_LETTER_UNCHECKABLE;
// Filter contents
@ -210,7 +173,7 @@ public abstract class AndroidWordLevelSpellCheckerSession extends Session {
if (Constants.CODE_PERIOD == codePoint) {
return CHECKABILITY_CONTAINS_PERIOD;
}
if (isLetterCheckableByLanguage(codePoint, script)) ++letterCount;
if (ScriptUtils.isLetterCheckableByScript(codePoint, script)) ++letterCount;
}
// Guestimate heuristic: perform spell checking if at least 3/4 of the characters
// in this word are letters

103
java/src/com/android/inputmethod/latin/utils/ScriptUtils.java Normal file
View File

@ -0,0 +1,103 @@
/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed 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.
*/
package com.android.inputmethod.latin.utils;
import java.util.Locale;
import java.util.TreeMap;
/**
* A class to help with handling different writing scripts.
*/
public class ScriptUtils {
public static final int SCRIPT_LATIN = 0;
public static final int SCRIPT_CYRILLIC = 1;
public static final int SCRIPT_GREEK = 2;
public static final TreeMap<String, Integer> mLanguageToScript;
static {
// List of the supported languages and their associated script. We won't check
// words written in another script than the selected script, because we know we
// don't have those in our dictionary so we will underline everything and we
// will never have any suggestions, so it makes no sense checking them, and this
// is done in {@link #shouldFilterOut}. Also, the script is used to choose which
// proximity to pass to the dictionary descent algorithm.
// IMPORTANT: this only contains languages - do not write countries in there.
// Only the language is searched from the map.
mLanguageToScript = new TreeMap<>();
mLanguageToScript.put("cs", SCRIPT_LATIN);
mLanguageToScript.put("da", SCRIPT_LATIN);
mLanguageToScript.put("de", SCRIPT_LATIN);
mLanguageToScript.put("el", SCRIPT_GREEK);
mLanguageToScript.put("en", SCRIPT_LATIN);
mLanguageToScript.put("es", SCRIPT_LATIN);
mLanguageToScript.put("fi", SCRIPT_LATIN);
mLanguageToScript.put("fr", SCRIPT_LATIN);
mLanguageToScript.put("hr", SCRIPT_LATIN);
mLanguageToScript.put("it", SCRIPT_LATIN);
mLanguageToScript.put("lt", SCRIPT_LATIN);
mLanguageToScript.put("lv", SCRIPT_LATIN);
mLanguageToScript.put("nb", SCRIPT_LATIN);
mLanguageToScript.put("nl", SCRIPT_LATIN);
mLanguageToScript.put("pt", SCRIPT_LATIN);
mLanguageToScript.put("sl", SCRIPT_LATIN);
mLanguageToScript.put("ru", SCRIPT_CYRILLIC);
}
/*
* Returns whether the code point is a letter that makes sense for the specified
* locale for this spell checker.
* The dictionaries supported by Latin IME are described in res/xml/spellchecker.xml
* and is limited to EFIGS languages and Russian.
* Hence at the moment this explicitly tests for Cyrillic characters or Latin characters
* as appropriate, and explicitly excludes CJK, Arabic and Hebrew characters.
*/
public static boolean isLetterCheckableByScript(final int codePoint, final int script) {
switch (script) {
case SCRIPT_LATIN:
// Our supported latin script dictionaries (EFIGS) at the moment only include
// characters in the C0, C1, Latin Extended A and B, IPA extensions unicode
// blocks. As it happens, those are back-to-back in the code range 0x40 to 0x2AF,
// so the below is a very efficient way to test for it. As for the 0-0x3F, it's
// excluded from isLetter anyway.
return codePoint <= 0x2AF && Character.isLetter(codePoint);
case SCRIPT_CYRILLIC:
// All Cyrillic characters are in the 400~52F block. There are some in the upper
// Unicode range, but they are archaic characters that are not used in modern
// Russian and are not used by our dictionary.
return codePoint >= 0x400 && codePoint <= 0x52F && Character.isLetter(codePoint);
case SCRIPT_GREEK:
// Greek letters are either in the 370~3FF range (Greek & Coptic), or in the
// 1F00~1FFF range (Greek extended). Our dictionary contains both sort of characters.
// Our dictionary also contains a few words with 0xF2; it would be best to check
// if that's correct, but a web search does return results for these words so
// they are probably okay.
return (codePoint >= 0x370 && codePoint <= 0x3FF)
|| (codePoint >= 0x1F00 && codePoint <= 0x1FFF)
|| codePoint == 0xF2;
default:
// Should never come here
throw new RuntimeException("Impossible value of script: " + script);
}
}
public static int getScriptFromLocale(final Locale locale) {
final Integer script = mLanguageToScript.get(locale.getLanguage());
if (null == script) {
throw new RuntimeException("We have been called with an unsupported language: \""
+ locale.getLanguage() + "\". Framework bug?");
}
return script;
}
}