+++ /dev/null
-/* WordBreakIterator.java - Default word BreakIterator.
- Copyright (C) 1999, 2001 Free Software Foundation, Inc.
-
-This file is part of GNU Classpath.
-
-GNU Classpath is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU Classpath is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Classpath; see the file COPYING. If not, write to the
-Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-02111-1307 USA.
-
-Linking this library statically or dynamically with other modules is
-making a combined work based on this library. Thus, the terms and
-conditions of the GNU General Public License cover the whole
-combination.
-
-As a special exception, the copyright holders of this library give you
-permission to link this library with independent modules to produce an
-executable, regardless of the license terms of these independent
-modules, and to copy and distribute the resulting executable under
-terms of your choice, provided that you also meet, for each linked
-independent module, the terms and conditions of the license of that
-module. An independent module is a module which is not derived from
-or based on this library. If you modify this library, you may extend
-this exception to your version of the library, but you are not
-obligated to do so. If you do not wish to do so, delete this
-exception statement from your version. */
-
-
-package gnu.java.text;
-
-import java.text.BreakIterator;
-import java.text.CharacterIterator;
-
-/**
- * @author Tom Tromey <tromey@cygnus.com>
- * @date March 22, 1999
- * Written using The Unicode Standard, Version 2.0.
- */
-
-public class WordBreakIterator extends BaseBreakIterator
-{
- public Object clone ()
- {
- return new WordBreakIterator (this);
- }
-
- public WordBreakIterator ()
- {
- iter = null;
- }
-
- private WordBreakIterator (WordBreakIterator other)
- {
- iter = (CharacterIterator) other.iter.clone();
- }
-
- // Some methods to tell us different properties of characters.
- private final boolean isHira (char c)
- {
- return c >= 0x3040 && c <= 0x309f;
- }
- private final boolean isKata (char c)
- {
- return c >= 0x30a0 && c <= 0x30ff;
- }
- private final boolean isHan (char c)
- {
- return c >= 0x4e00 && c <= 0x9fff;
- }
-
- public int next ()
- {
- int end = iter.getEndIndex();
- if (iter.getIndex() == end)
- return DONE;
-
- while (iter.getIndex() < end)
- {
- char c = iter.current();
- if (c == CharacterIterator.DONE)
- break;
- int type = Character.getType(c);
-
- char n = iter.next();
- if (n == CharacterIterator.DONE)
- break;
-
- // Break after paragraph separators.
- if (type == Character.PARAGRAPH_SEPARATOR
- || type == Character.LINE_SEPARATOR)
- break;
-
- // Break between letters and non-letters.
- // FIXME: we treat apostrophe as part of a word. This
- // is an English-ism.
- boolean is_letter = Character.isLetter(c);
- if (c != '\'' && ! is_letter && type != Character.NON_SPACING_MARK
- && Character.isLetter(n))
- break;
-
- // Always break after certain symbols, such as punctuation.
- // This heuristic is derived from hints in the JCL book and is
- // not part of Unicode. It seems to be right, however.
- // FIXME: we treat apostrophe as part of a word. This
- // is an English-ism.
- if (c != '\''
- && (type == Character.DASH_PUNCTUATION
- || type == Character.START_PUNCTUATION
- || type == Character.END_PUNCTUATION
- || type == Character.CONNECTOR_PUNCTUATION
- || type == Character.OTHER_PUNCTUATION
- || type == Character.MATH_SYMBOL
- || type == Character.CURRENCY_SYMBOL
- || type == Character.MODIFIER_SYMBOL
- || type == Character.OTHER_SYMBOL
- || type == Character.FORMAT
- || type == Character.CONTROL))
- break;
-
- boolean is_hira = isHira (c);
- boolean is_kata = isKata (c);
- boolean is_han = isHan (c);
-
- // Special case Japanese.
- if (! is_hira && ! is_kata && ! is_han
- && type != Character.NON_SPACING_MARK
- && (isHira (n) || isKata (n) || isHan (n)))
- break;
-
- if (is_hira || is_kata || is_han || is_letter)
- {
- // Now we need to do some lookahead. We might need to do
- // quite a bit of lookahead, so we save our position and
- // restore it later.
- int save = iter.getIndex();
- // Skip string of non spacing marks.
- while (n != CharacterIterator.DONE
- && Character.getType(n) == Character.NON_SPACING_MARK)
- n = iter.next();
- if (n == CharacterIterator.DONE)
- break;
- if ((is_hira && ! isHira (n))
- || (is_kata && ! isHira (n) && ! isKata (n))
- || (is_han && ! isHira (n) && ! isHan (n))
- // FIXME: we treat apostrophe as part of a word. This
- // is an English-ism.
- || (is_letter && ! Character.isLetter(n) && n != '\''))
- break;
- iter.setIndex(save);
- }
- }
-
- return iter.getIndex();
- }
-
- public int previous ()
- {
- int start = iter.getBeginIndex();
- if (iter.getIndex() == start)
- return DONE;
-
- while (iter.getIndex() >= start)
- {
- char c = iter.previous();
- if (c == CharacterIterator.DONE)
- break;
-
- boolean is_hira = isHira (c);
- boolean is_kata = isKata (c);
- boolean is_han = isHan (c);
- boolean is_letter = Character.isLetter(c);
-
- char n = iter.previous();
- if (n == CharacterIterator.DONE)
- break;
- iter.next();
- int type = Character.getType(n);
- // Break after paragraph separators.
- if (type == Character.PARAGRAPH_SEPARATOR
- || type == Character.LINE_SEPARATOR)
- break;
-
- // Break between letters and non-letters.
- // FIXME: we treat apostrophe as part of a word. This
- // is an English-ism.
- if (n != '\'' && ! Character.isLetter(n)
- && type != Character.NON_SPACING_MARK
- && is_letter)
- break;
-
- // Always break after certain symbols, such as punctuation.
- // This heuristic is derived from hints in the JCL book and is
- // not part of Unicode. It seems to be right, however.
- // FIXME: we treat apostrophe as part of a word. This
- // is an English-ism.
- if (n != '\''
- && (type == Character.DASH_PUNCTUATION
- || type == Character.START_PUNCTUATION
- || type == Character.END_PUNCTUATION
- || type == Character.CONNECTOR_PUNCTUATION
- || type == Character.OTHER_PUNCTUATION
- || type == Character.MATH_SYMBOL
- || type == Character.CURRENCY_SYMBOL
- || type == Character.MODIFIER_SYMBOL
- || type == Character.OTHER_SYMBOL
- || type == Character.FORMAT
- || type == Character.CONTROL))
- break;
-
- // Special case Japanese.
- if ((is_hira || is_kata || is_han)
- && ! isHira (n) && ! isKata (n) && ! isHan (n)
- && type != Character.NON_SPACING_MARK)
- break;
-
- // We might have to skip over non spacing marks to see what's
- // on the other side.
- if (! is_hira || (! is_letter && c != '\''))
- {
- int save = iter.getIndex();
- while (n != CharacterIterator.DONE
- && Character.getType(n) == Character.NON_SPACING_MARK)
- n = iter.previous();
- iter.setIndex(save);
- // This is a strange case: a bunch of non-spacing marks at
- // the beginning. We treat the current location as a word
- // break.
- if (n == CharacterIterator.DONE)
- break;
- if ((isHira (n) && ! is_hira)
- || (isKata (n) && ! is_hira && ! is_kata)
- || (isHan (n) && ! is_hira && ! is_han)
- // FIXME: we treat apostrophe as part of a word. This
- // is an English-ism.
- || (! is_letter && c != '\'' && Character.isLetter(n)))
- break;
- }
- }
-
- return iter.getIndex();
- }
-}
projects / msp430-gcc.git / blobdiff