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Diffstat (limited to 'libjava/gnu/gcj/text/CharacterBreakIterator.java')
| -rw-r--r-- | libjava/gnu/gcj/text/CharacterBreakIterator.java | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/libjava/gnu/gcj/text/CharacterBreakIterator.java b/libjava/gnu/gcj/text/CharacterBreakIterator.java deleted file mode 100644 index ba087ccc461..00000000000 --- a/libjava/gnu/gcj/text/CharacterBreakIterator.java +++ /dev/null @@ -1,188 +0,0 @@ -// Default character BreakIterator. - -/* Copyright (C) 1999 Free Software Foundation - - This file is part of libgcj. - -This software is copyrighted work licensed under the terms of the -Libgcj License. Please consult the file "LIBGCJ_LICENSE" for -details. */ - -package gnu.gcj.text; - -import java.text.BreakIterator; -import java.text.CharacterIterator; - -/** - * @author Tom Tromey <tromey@cygnus.com> - * @date March 19, 1999 - * Written using The Unicode Standard, Version 2.0. - */ - -public class CharacterBreakIterator extends BaseBreakIterator -{ - // Hangul Jamo constants from Unicode book. - private static final int LBase = 0x1100; - private static final int VBase = 0x1161; - private static final int TBase = 0x11a7; - private static final int LCount = 19; - private static final int VCount = 21; - private static final int TCount = 28; - - // Information about surrogates. - private static final int highSurrogateStart = 0xD800; - private static final int highSurrogateEnd = 0xDBFF; - private static final int lowSurrogateStart = 0xDC00; - private static final int lowSurrogateEnd = 0xDFFF; - - public Object clone () - { - return new CharacterBreakIterator (this); - } - - public CharacterBreakIterator () - { - iter = null; // FIXME? - } - - private CharacterBreakIterator (CharacterBreakIterator other) - { - iter = (CharacterIterator) other.iter.clone(); - } - - // Some methods to tell us different properties of characters. - private final boolean isL (char c) - { - return c >= LBase && c <= LBase + LCount; - } - private final boolean isV (char c) - { - return c >= VBase && c <= VBase + VCount; - } - private final boolean isT (char c) - { - return c >= TBase && c <= TBase + TCount; - } - private final boolean isLVT (char c) - { - return isL (c) || isV (c) || isT (c); - } - private final boolean isHighSurrogate (char c) - { - return c >= highSurrogateStart && c <= highSurrogateEnd; - } - private final boolean isLowSurrogate (char c) - { - return c >= lowSurrogateStart && c <= lowSurrogateEnd; - } - - public int next () - { - int end = iter.getEndIndex(); - if (iter.getIndex() == end) - return DONE; - - char c; - for (char prev = CharacterIterator.DONE; iter.getIndex() < end; prev = c) - { - c = iter.next(); - if (c == CharacterIterator.DONE) - break; - int type = Character.getType(c); - - // Break after paragraph separators. - if (type == Character.PARAGRAPH_SEPARATOR) - break; - - // Now we need some lookahead. - char ahead = iter.next(); - iter.previous(); - if (ahead == CharacterIterator.DONE) - break; - int aheadType = Character.getType(ahead); - - if (aheadType != Character.NON_SPACING_MARK - && ! isLowSurrogate (ahead) - && ! isLVT (ahead)) - break; - if (! isLVT (c) && isLVT (ahead)) - break; - if (isL (c) && ! isLVT (ahead) - && aheadType != Character.NON_SPACING_MARK) - break; - if (isV (c) && ! isV (ahead) && !isT (ahead) - && aheadType != Character.NON_SPACING_MARK) - break; - if (isT (c) && ! isT (ahead) - && aheadType != Character.NON_SPACING_MARK) - break; - - if (! isHighSurrogate (c) && isLowSurrogate (ahead)) - break; - if (isHighSurrogate (c) && ! isLowSurrogate (ahead)) - break; - if (! isHighSurrogate (prev) && isLowSurrogate (c)) - break; - } - - return iter.getIndex(); - } - - public int previous () - { - if (iter.getIndex() == iter.getBeginIndex()) - return DONE; - - int start = iter.getBeginIndex(); - while (iter.getIndex() >= iter.getBeginIndex()) - { - char c = iter.previous(); - if (c == CharacterIterator.DONE) - break; - int type = Character.getType(c); - - if (type != Character.NON_SPACING_MARK - && ! isLowSurrogate (c) - && ! isLVT (c)) - break; - - // Now we need some lookahead. - char ahead = iter.previous(); - if (ahead == CharacterIterator.DONE) - { - iter.next(); - break; - } - char ahead2 = iter.previous(); - iter.next(); - iter.next(); - if (ahead2 == CharacterIterator.DONE) - break; - int aheadType = Character.getType(ahead); - - if (aheadType == Character.PARAGRAPH_SEPARATOR) - break; - - if (isLVT (c) && ! isLVT (ahead)) - break; - if (! isLVT (c) && type != Character.NON_SPACING_MARK - && isL (ahead)) - break; - if (! isV (c) && ! isT (c) && type != Character.NON_SPACING_MARK - && isV (ahead)) - break; - if (! isT (c) && type != Character.NON_SPACING_MARK - && isT (ahead)) - break; - - if (isLowSurrogate (c) && ! isHighSurrogate (ahead)) - break; - if (! isLowSurrogate (c) && isHighSurrogate (ahead)) - break; - if (isLowSurrogate (ahead) && ! isHighSurrogate (ahead2)) - break; - } - - return iter.getIndex(); - } -} |