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Add some utility functions. 

Bug: 7657025
Change-Id: I4889721b5348c77ed56c5157557e9988dea48a02
main
Jean Chalard 2013-04-05 15:52:41 +09:00
parent 269f141bed
commit 1cbb0b8f2a
2 changed files with 150 additions and 0 deletions
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71
java/src/com/android/inputmethod/latin/StringUtils.java
View File

@ -222,4 +222,75 @@ public final class StringUtils {
if (1 == capsCount) return CAPITALIZE_FIRST;
return (letterCount == capsCount ? CAPITALIZE_ALL : CAPITALIZE_NONE);
}
public static boolean isIdenticalAfterUpcase(final String text) {
final int len = text.length();
for (int i = 0; i < len; i = text.offsetByCodePoints(i, 1)) {
final int codePoint = text.codePointAt(i);
if (Character.isLetter(codePoint) && !Character.isUpperCase(codePoint)) {
return false;
}
}
return true;
}
public static boolean isIdenticalAfterDowncase(final String text) {
final int len = text.length();
for (int i = 0; i < len; i = text.offsetByCodePoints(i, 1)) {
final int codePoint = text.codePointAt(i);
if (Character.isLetter(codePoint) && !Character.isLowerCase(codePoint)) {
return false;
}
}
return true;
}
public static boolean isIdenticalAfterCapitalizeEachWord(final String text,
final String separators) {
boolean needCapsNext = true;
final int len = text.length();
for (int i = 0; i < len; i = text.offsetByCodePoints(i, 1)) {
final int codePoint = text.codePointAt(i);
if (Character.isLetter(codePoint)) {
if ((needCapsNext && !Character.isUpperCase(codePoint))
|| (!needCapsNext && !Character.isLowerCase(codePoint))) {
return false;
}
}
// We need a capital letter next if this is a separator.
needCapsNext = (-1 != separators.indexOf(codePoint));
}
return true;
}
// TODO: like capitalizeFirst*, this does not work perfectly for Dutch because of the IJ digraph
// which should be capitalized together in *some* cases.
public static String capitalizeEachWord(final String text, final String separators,
final Locale locale) {
final StringBuilder builder = new StringBuilder();
boolean needCapsNext = true;
final int len = text.length();
for (int i = 0; i < len; i = text.offsetByCodePoints(i, 1)) {
final String nextChar = text.substring(i, text.offsetByCodePoints(i, 1));
if (needCapsNext) {
builder.append(nextChar.toUpperCase(locale));
} else {
builder.append(nextChar.toLowerCase(locale));
}
// We need a capital letter next if this is a separator.
needCapsNext = (-1 != separators.indexOf(nextChar.codePointAt(0)));
}
return builder.toString();
}
public static boolean containsAny(final String string, final String separators) {
final int len = separators.length();
for (int i = 0; i < len; i = separators.offsetByCodePoints(i, 1)) {
final int separator = separators.codePointAt(i);
if (-1 != string.indexOf(separator)) {
return true;
}
}
return false;
}
}

79
tests/src/com/android/inputmethod/latin/StringUtilsTests.java
View File

@ -154,4 +154,83 @@ public class StringUtilsTests extends AndroidTestCase {
assertEquals(StringUtils.CAPITALIZE_NONE,
StringUtils.getCapitalizationType(""));
}
public void testIsIdenticalAfterUpcaseIsIdenticalAfterDowncase() {
assertFalse(StringUtils.isIdenticalAfterUpcase("capitalize"));
assertTrue(StringUtils.isIdenticalAfterDowncase("capitalize"));
assertFalse(StringUtils.isIdenticalAfterUpcase("cApITalize"));
assertFalse(StringUtils.isIdenticalAfterDowncase("cApITalize"));
assertFalse(StringUtils.isIdenticalAfterUpcase("capitalizE"));
assertFalse(StringUtils.isIdenticalAfterDowncase("capitalizE"));
assertFalse(StringUtils.isIdenticalAfterUpcase("__c a piu$@tali56ze"));
assertTrue(StringUtils.isIdenticalAfterDowncase("__c a piu$@tali56ze"));
assertFalse(StringUtils.isIdenticalAfterUpcase("A__c a piu$@tali56ze"));
assertFalse(StringUtils.isIdenticalAfterDowncase("A__c a piu$@tali56ze"));
assertFalse(StringUtils.isIdenticalAfterUpcase("Capitalize"));
assertFalse(StringUtils.isIdenticalAfterDowncase("Capitalize"));
assertFalse(StringUtils.isIdenticalAfterUpcase(" Capitalize"));
assertFalse(StringUtils.isIdenticalAfterDowncase(" Capitalize"));
assertTrue(StringUtils.isIdenticalAfterUpcase("CAPITALIZE"));
assertFalse(StringUtils.isIdenticalAfterDowncase("CAPITALIZE"));
assertTrue(StringUtils.isIdenticalAfterUpcase(" PI26LIE"));
assertFalse(StringUtils.isIdenticalAfterDowncase(" PI26LIE"));
assertTrue(StringUtils.isIdenticalAfterUpcase(""));
assertTrue(StringUtils.isIdenticalAfterDowncase(""));
}
private void checkCapitalize(final String src, final String dst, final String separators,
final Locale locale) {
assertEquals(dst, StringUtils.capitalizeEachWord(src, separators, locale));
assert(src.equals(dst)
== StringUtils.isIdenticalAfterCapitalizeEachWord(src, separators));
}
public void testCapitalizeEachWord() {
checkCapitalize("", "", " ", Locale.ENGLISH);
checkCapitalize("test", "Test", " ", Locale.ENGLISH);
checkCapitalize(" test", " Test", " ", Locale.ENGLISH);
checkCapitalize("Test", "Test", " ", Locale.ENGLISH);
checkCapitalize(" Test", " Test", " ", Locale.ENGLISH);
checkCapitalize(".Test", ".test", " ", Locale.ENGLISH);
checkCapitalize(".Test", ".Test", " .", Locale.ENGLISH);
checkCapitalize(".Test", ".Test", ". ", Locale.ENGLISH);
checkCapitalize("test and retest", "Test And Retest", " .", Locale.ENGLISH);
checkCapitalize("Test and retest", "Test And Retest", " .", Locale.ENGLISH);
checkCapitalize("Test And Retest", "Test And Retest", " .", Locale.ENGLISH);
checkCapitalize("Test And.Retest ", "Test And.Retest ", " .", Locale.ENGLISH);
checkCapitalize("Test And.retest ", "Test And.Retest ", " .", Locale.ENGLISH);
checkCapitalize("Test And.retest ", "Test And.retest ", " ", Locale.ENGLISH);
checkCapitalize("Test And.Retest ", "Test And.retest ", " ", Locale.ENGLISH);
checkCapitalize("test and ietest", "Test And İetest", " .", new Locale("tr"));
checkCapitalize("test and ietest", "Test And Ietest", " .", Locale.ENGLISH);
checkCapitalize("Test&Retest", "Test&Retest", " \n.!?*()&", Locale.ENGLISH);
checkCapitalize("Test&retest", "Test&Retest", " \n.!?*()&", Locale.ENGLISH);
checkCapitalize("test&Retest", "Test&Retest", " \n.!?*()&", Locale.ENGLISH);
checkCapitalize("rest\nrecreation! And in the end...",
"Rest\nRecreation! And In The End...", " \n.!?*,();&", Locale.ENGLISH);
checkCapitalize("lorem ipsum dolor sit amet", "Lorem Ipsum Dolor Sit Amet",
" \n.,!?*()&;", Locale.ENGLISH);
checkCapitalize("Lorem!Ipsum (Dolor) Sit * Amet", "Lorem!Ipsum (Dolor) Sit * Amet",
" \n,.;!?*()&", Locale.ENGLISH);
checkCapitalize("Lorem!Ipsum (dolor) Sit * Amet", "Lorem!Ipsum (Dolor) Sit * Amet",
" \n,.;!?*()&", Locale.ENGLISH);
}
public void testContainsAny() {
assertFalse(StringUtils.containsAny("", " "));
assertFalse(StringUtils.containsAny("test and retest", ""));
assertTrue(StringUtils.containsAny("test and retest", "x3iq o"));
assertTrue(StringUtils.containsAny("test and retest", "x3iqo "));
assertTrue(StringUtils.containsAny("test and retest", " x3iqo"));
assertFalse(StringUtils.containsAny("test and retest", "x3iqo"));
assertTrue(StringUtils.containsAny("test and retest", "tse "));
assertTrue(StringUtils.containsAny("test and retest.", ".?()"));
assertFalse(StringUtils.containsAny("test and retest", ".?()"));
// Surrogate pair
assertTrue(StringUtils.containsAny("test and \uD861\uDED7 retest.", "\uD861\uDED7"));
// Ill-formed string
assertFalse(StringUtils.containsAny("test and \uD861 retest.", "\uD861\uDED7"));
// Ill-formed string
assertFalse(StringUtils.containsAny("test and \uDED7 retest.", "\uD861\uDED7"));
}
}