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authorGuilhem Lavaux <guilhem@kaffe.org>2004-05-04 16:27:20 +0000
committerMichael Koch <mkoch@gcc.gnu.org>2004-05-04 16:27:20 +0000
commit065afdfa8e2e699b1f5ac17c43ac4664940f6659 (patch)
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parentc6c8779bfcc91e981006ab21c94acde922b5d799 (diff)
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FormatBuffer.java, [...]: New classes to implement attributed iterators in java.text.
2004-05-04 Guilhem Lavaux <guilhem@kaffe.org> * gnu/java/text/FormatBuffer.java, gnu/java/text/AttributedFormatBuffer.java, gnu/java/text/StringFormatBuffer.java: New classes to implement attributed iterators in java.text. * gnu/java/text/FormatCharacterIterator.java: Moved from java/text as it is an internal class. * java/text/FormatCharacterIterator.java: Removed. * java/text/Format.java: Import gnu.java.text.FormatCharacterIterator. * Makefile.am (java_source_files): Added new files. * Makefile.in: Regenerated. From-SVN: r81479
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+/* AttributedFormatBuffer.java -- Implements an attributed FormatBuffer.
+ Copyright (C) 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 gnu.java.text;
+
+import java.text.AttributedCharacterIterator;
+import java.util.ArrayList;
+import java.util.HashMap;
+
+/**
+ * This class is an implementation of a FormatBuffer with attributes.
+ *
+ * @author Guilhem Lavaux <guilhem@kaffe.org>
+ * @date April 10, 2004
+ */
+public class AttributedFormatBuffer implements FormatBuffer
+{
+ private StringBuffer buffer;
+ private ArrayList ranges;
+ private ArrayList attributes;
+ private int[] a_ranges;
+ private HashMap[] a_attributes;
+ private int startingRange;
+ AttributedCharacterIterator.Attribute defaultAttr;
+
+ /**
+ * This constructor accepts a StringBuffer. If the buffer contains
+ * already some characters they will not be attributed.
+ */
+ public AttributedFormatBuffer(StringBuffer buffer)
+ {
+ this.buffer = buffer;
+ this.ranges = new ArrayList();
+ this.attributes = new ArrayList();
+ this.defaultAttr = null;
+ if (buffer.length() != 0)
+ {
+ this.startingRange = buffer.length();
+ addAttribute(buffer.length(), null);
+ }
+ else
+ this.startingRange = -1;
+ }
+
+ public AttributedFormatBuffer(int prebuffer)
+ {
+ this(new StringBuffer(prebuffer));
+ }
+
+ public AttributedFormatBuffer()
+ {
+ this(10);
+ }
+
+ /**
+ * This method is a helper function for formatters. Given a set of ranges
+ * and attributes it adds exactly one attribute for the range of characters
+ * comprised between the last entry in 'ranges' and the specified new range.
+ *
+ * @param new_range A new range to insert in the list.
+ * @param new_attribute A new attribute to insert in the list.
+ */
+ private final void addAttribute(int new_range, AttributedCharacterIterator.Attribute attr)
+ {
+ HashMap map;
+
+ if (attr != null)
+ {
+ map = new HashMap();
+ map.put(attr, attr);
+ attributes.add(map);
+ }
+ else
+ attributes.add(null);
+
+ ranges.add(new Integer(new_range));
+ }
+
+ public void append(String s)
+ {
+ if (startingRange < 0)
+ startingRange = 0;
+ buffer.append(s);
+ }
+
+ public void append(String s, AttributedCharacterIterator.Attribute attr)
+ {
+ setDefaultAttribute(attr);
+ startingRange = buffer.length();
+ append(s);
+ setDefaultAttribute(null);
+ }
+
+ public void append(String s, int[] ranges, HashMap[] attrs)
+ {
+ int curPos = buffer.length();
+
+ setDefaultAttribute(null);
+ if (ranges != null)
+ {
+ for (int i = 0; i < ranges.length; i++)
+ {
+ this.ranges.add(new Integer(ranges[i] + curPos));
+ this.attributes.add(attrs[i]);
+ }
+ }
+ startingRange = buffer.length();
+ buffer.append(s);
+ }
+
+ public void append(char c)
+ {
+ if (startingRange < 0)
+ startingRange = buffer.length();
+ buffer.append(c);
+ }
+
+ public void append(char c, AttributedCharacterIterator.Attribute attr)
+ {
+ setDefaultAttribute(attr);
+ buffer.append(c);
+ setDefaultAttribute(null);
+ }
+
+ public void setDefaultAttribute(AttributedCharacterIterator.Attribute attr)
+ {
+ if (attr == defaultAttr)
+ return;
+
+ int currentPos = buffer.length();
+
+ if (startingRange != currentPos && startingRange >= 0)
+ {
+ addAttribute(currentPos, defaultAttr);
+ }
+ defaultAttr = attr;
+ startingRange = currentPos;
+ }
+
+ public AttributedCharacterIterator.Attribute getDefaultAttribute()
+ {
+ return defaultAttr;
+ }
+
+ public void cutTail(int length)
+ {
+ buffer.setLength(buffer.length()-length);
+ }
+
+ public int length()
+ {
+ return buffer.length();
+ }
+
+ public void clear()
+ {
+ buffer.setLength(0);
+ ranges.clear();
+ attributes.clear();
+ defaultAttr = null;
+ startingRange = -1;
+ }
+
+ /**
+ * This method synchronizes the state of the attribute array.
+ * After calling it you may call {@link #getDefaultAttribute()}.
+ */
+ public void sync()
+ {
+ if (startingRange < 0 || startingRange == buffer.length())
+ return;
+
+ addAttribute(buffer.length(), defaultAttr);
+
+ a_ranges = new int[ranges.size()];
+ for (int i = 0; i < a_ranges.length; i++)
+ a_ranges[i] = ((Integer)(ranges.get (i))).intValue();
+
+ a_attributes = new HashMap[attributes.size()];
+ System.arraycopy(attributes.toArray(), 0, a_attributes, 0, a_attributes.length);
+ }
+
+ /**
+ * This method returns the internal StringBuffer describing
+ * the attributed string.
+ *
+ * @return An instance of StringBuffer which contains the string.
+ */
+ public StringBuffer getBuffer()
+ {
+ return buffer;
+ }
+
+ /**
+ * This method returns the ranges for the attributes.
+ *
+ * @return An array of int describing the ranges.
+ */
+ public int[] getRanges()
+ {
+ return a_ranges;
+ }
+
+ /**
+ * This method returns the array containing the map on the
+ * attributes.
+ *
+ * @return An array of {@link java.util.Map} containing the attributes.
+ */
+ public HashMap[] getAttributes()
+ {
+ return a_attributes;
+ }
+}
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