| /* AttributedStringIterator.java -- Class to iterate over AttributedString |
| Copyright (C) 1998, 1999, 2004 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 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 -1; |
| } |
| |
| /*************************************************************************/ |
| |
| /** |
| * 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 |
| |