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Diffstat (limited to 'libjava/classpath/java/text/AttributedStringIterator.java')
-rw-r--r-- | libjava/classpath/java/text/AttributedStringIterator.java | 348 |
1 files changed, 348 insertions, 0 deletions
diff --git a/libjava/classpath/java/text/AttributedStringIterator.java b/libjava/classpath/java/text/AttributedStringIterator.java new file mode 100644 index 0000000..7d7bf27 --- /dev/null +++ b/libjava/classpath/java/text/AttributedStringIterator.java @@ -0,0 +1,348 @@ +/* AttributedStringIterator.java -- Class to iterate over AttributedString + Copyright (C) 1998, 1999, 2004, 2005 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., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 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 java.text; + +import java.util.HashMap; +import java.util.HashSet; +import java.util.Iterator; +import java.util.Map; +import java.util.Set; + +/** + * This class implements the AttributedCharacterIterator interface. It + * is used by AttributedString.getIterator(). + * + * @version 0.0 + * + * @author Aaron M. Renn (arenn@urbanophile.com) + */ +class AttributedStringIterator implements AttributedCharacterIterator +{ + +/*************************************************************************/ + +/** + * Instance Variables + */ + +/** + * The character iterator containing the text + */ +private CharacterIterator ci; + +/** + * The list of attributes and ranges + */ +private AttributedString.AttributeRange[] attribs; + +/** + * The list of attributes that the user is interested in. We may, + * at our option, not return any other attributes. + */ +private AttributedCharacterIterator.Attribute[] restricts; + +/*************************************************************************/ + +/* + * Constructors + */ + +AttributedStringIterator(StringCharacterIterator sci, + AttributedString.AttributeRange[] attribs, + int begin_index, int end_index, + AttributedCharacterIterator.Attribute[] restricts) +{ + this.ci = new StringCharacterIterator(sci, begin_index, end_index); + this.attribs = attribs; + this.restricts = restricts; +} + +/*************************************************************************/ + +/* + * Instance Methods + */ + +// First we have a bunch of stupid redirects. If StringCharacterIterator +// weren't final, I just would have extended that for this class. Alas, no. + +public Object +clone() +{ + return(ci.clone()); +} + +public char +current() +{ + return(ci.current()); +} + +public char +next() +{ + return(ci.next()); +} + +public char +previous() +{ + return(ci.previous()); +} + +public char +first() +{ + return(ci.first()); +} + +public char +last() +{ + return(ci.last()); +} + +public int +getIndex() +{ + return(ci.getIndex()); +} + +public char +setIndex(int index) +{ + return(ci.setIndex(index)); +} + +public int +getBeginIndex() +{ + return(ci.getBeginIndex()); +} + +public int +getEndIndex() +{ + return(ci.getEndIndex()); +} + +/* + * Here is where the AttributedCharacterIterator methods start. + */ + +/*************************************************************************/ + +/** + * Returns a list of all the attribute keys that are defined anywhere + * on this string. + */ +public Set +getAllAttributeKeys() +{ + HashSet s = new HashSet(); + if (attribs == null) + return(s); + + for (int i = 0; i < attribs.length; i++) + { + if (attribs[i].begin_index > getEndIndex() + || attribs[i].end_index <= getBeginIndex()) + continue; + + Set key_set = attribs[i].attribs.keySet(); + Iterator iter = key_set.iterator(); + while (iter.hasNext()) + { + s.add(iter.next()); + } + } + + return(s); +} + +/*************************************************************************/ + +/** + * Various methods that determine how far the run extends for various + * attribute combinations. + */ + +public int +getRunLimit() +{ + return(getRunLimit(getAttributes().keySet())); +} + +public int +getRunLimit(AttributedCharacterIterator.Attribute attrib) +{ + HashSet s = new HashSet(); + s.add(attrib); + + return(getRunLimit(s)); +} + +public synchronized int +getRunLimit(Set attribute_set) +{ + boolean hit = false; + int runLimit = ci.getEndIndex (); + int pos = ci.getIndex (); + + for (int i = 0; i < attribs.length; ++i) + { + if (pos >= attribs[i].begin_index && + pos < attribs[i].end_index) + { + Iterator iter = attribute_set.iterator(); + while(iter.hasNext()) + if (attribs[i].attribs.containsKey(iter.next())) + { + hit = true; + runLimit = Math.min(runLimit, attribs[i].end_index); + } + } + } + if (hit) + return runLimit; + else + return ci.getEndIndex(); +} + +/*************************************************************************/ + +/** + * Various methods that determine where the run begins for various + * attribute combinations. + */ + +public int +getRunStart() +{ + return(getRunStart(getAttributes().keySet())); +} + +public int +getRunStart(AttributedCharacterIterator.Attribute attrib) +{ + HashSet s = new HashSet(); + s.add(attrib); + + return(getRunStart(s)); +} + +public int +getRunStart(Set attribute_set) +{ + boolean hit = false; + int runBegin = 0; + int pos = ci.getIndex (); + + for (int i = 0; i < attribs.length; ++i) + { + if (pos >= attribs[i].begin_index && + pos <= attribs[i].end_index) + { + Iterator iter = attribute_set.iterator(); + while(iter.hasNext()) + if (attribs[i].attribs.containsKey(iter.next())) + { + hit = true; + runBegin = Math.max(runBegin, attribs[i].begin_index); + } + } + } + if (hit) + return runBegin; + else + return -1; +} + +/*************************************************************************/ + +public Object +getAttribute(AttributedCharacterIterator.Attribute attrib) +{ + if (attribs == null) + return(null); + + for (int i = 0; i < attribs.length; i++) + { + Set key_set = attribs[i].attribs.keySet(); + Iterator iter = key_set.iterator(); + while (iter.hasNext()) + { + Object obj = iter.next(); + + // Check for attribute match and range match + if (obj.equals(attrib)) + if ((ci.getIndex() >= attribs[i].begin_index) && + (ci.getIndex() < attribs[i].end_index)) + return(attribs[i].attribs.get(obj)); + } + } + + return(null); +} + +/*************************************************************************/ + +/** + * Return a list of all the attributes and values defined for this + * character + */ +public Map +getAttributes() +{ + HashMap m = new HashMap(); + if (attribs == null) + return(m); + + for (int i = 0; i < attribs.length; i++) + { + if ((ci.getIndex() >= attribs[i].begin_index) && + (ci.getIndex() < attribs[i].end_index)) + m.putAll(attribs[i].attribs); + } + + return(m); +} + +} // class AttributedStringIterator + |