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+/* FormatCharacter.java -- Implementation of AttributedCharacterIterator for
+ formatters.
+ Copyright (C) 1998, 1999, 2000, 2001, 2003, 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 gnu.java.text;
+
+import java.text.AttributedCharacterIterator;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Set;
+import java.util.Vector;
+
+/**
+ * This class should not be put public and it is only intended to the
+ * classes of the java.text package. Its aim is to build a segmented
+ * character iterator by appending strings and adding attributes to
+ * portions of strings. The code intends to do some optimization
+ * concerning memory consumption and attribute access but at the
+ * end it is only an AttributedCharacterIterator.
+ *
+ * @author Guilhem Lavaux <guilhem@kaffe.org>
+ * @date November 22, 2003
+ */
+public class FormatCharacterIterator implements AttributedCharacterIterator
+{
+ private String formattedString;
+ private int charIndex;
+ private int attributeIndex;
+ private int[] ranges;
+ private HashMap[] attributes;
+ private static final boolean DEBUG = false;
+
+ /**
+ * This constructor builds an empty iterated strings. The attributes
+ * are empty and so is the string. However you may append strings
+ * and attributes to this iterator.
+ */
+ public FormatCharacterIterator()
+ {
+ formattedString = "";
+ ranges = new int[0];
+ attributes = new HashMap[0];
+ }
+
+ /**
+ * This constructor take a string <code>s</code>, a set of ranges
+ * and the corresponding attributes. This is used to build an iterator.
+ * The array <code>ranges</code> should be formatted as follow:
+ * each element of <code>ranges</code> specifies the index in the string
+ * until which the corresponding map of attributes at the same position
+ * is applied. For example, if you have:
+ * <pre>
+ * s = "hello";
+ * ranges = new int[] { 2, 6 };
+ * attributes = new HashMap[2];
+ * </pre>
+ * <code>"he"</code> will have the attributes <code>attributes[0]</code>,
+ * <code>"llo"</code> the <code>attributes[1]</code>.
+ */
+ public FormatCharacterIterator (String s, int[] ranges, HashMap[] attributes)
+ {
+ formattedString = s;
+ this.ranges = ranges;
+ this.attributes = attributes;
+ }
+
+ /*
+ * The following methods are inherited from AttributedCharacterIterator,
+ * and thus are already documented.
+ */
+
+ public Set getAllAttributeKeys()
+ {
+ if (attributes != null && attributes[attributeIndex] != null)
+ return attributes[attributeIndex].keySet();
+ else
+ return new HashSet();
+ }
+
+ public Map getAttributes()
+ {
+ if (attributes != null && attributes[attributeIndex] != null)
+ return attributes[attributeIndex];
+ else
+ return new HashMap();
+ }
+
+ public Object getAttribute (AttributedCharacterIterator.Attribute attrib)
+ {
+ if (attributes != null && attributes[attributeIndex] != null)
+ return attributes[attributeIndex].get (attrib);
+ else
+ return null;
+ }
+
+ public int getRunLimit(Set reqAttrs)
+ {
+ if (attributes == null)
+ return formattedString.length();
+
+ int currentAttrIndex = attributeIndex;
+ Set newKeys;
+
+ do
+ {
+ currentAttrIndex++;
+ if (currentAttrIndex == attributes.length)
+ return formattedString.length();
+ if (attributes[currentAttrIndex] == null)
+ break;
+ newKeys = attributes[currentAttrIndex].keySet();
+ }
+ while (newKeys.containsAll (reqAttrs));
+
+ return ranges[currentAttrIndex-1];
+ }
+
+ public int getRunLimit (AttributedCharacterIterator.Attribute attribute)
+ {
+ Set s = new HashSet();
+
+ s.add (attribute);
+ return getRunLimit (s);
+ }
+
+ public int getRunLimit()
+ {
+ if (attributes == null)
+ return formattedString.length();
+ if (attributes[attributeIndex] == null)
+ {
+ for (int i=attributeIndex+1;i<attributes.length;i++)
+ if (attributes[i] != null)
+ return ranges[i-1];
+ return formattedString.length();
+ }
+
+ return getRunLimit (attributes[attributeIndex].keySet());
+ }
+
+ public int getRunStart (Set reqAttrs)
+ {
+ if (attributes == null)
+ return formattedString.length();
+
+ int currentAttrIndex = attributeIndex;
+ Set newKeys = null;
+
+ do
+ {
+ if (currentAttrIndex == 0)
+ return 0;
+
+ currentAttrIndex--;
+ if (attributes[currentAttrIndex] == null)
+ break;
+ newKeys = attributes[currentAttrIndex].keySet();
+ }
+ while (newKeys.containsAll (reqAttrs));
+
+ return (currentAttrIndex > 0) ? ranges[currentAttrIndex-1] : 0;
+ }
+
+ public int getRunStart()
+ {
+ if (attributes == null)
+ return 0;
+
+ if (attributes[attributeIndex] == null)
+ {
+ for (int i=attributeIndex;i>0;i--)
+ if (attributes[i] != null)
+ return ranges[attributeIndex-1];
+ return 0;
+ }
+
+ return getRunStart (attributes[attributeIndex].keySet());
+ }
+
+ public int getRunStart (AttributedCharacterIterator.Attribute attribute)
+ {
+ Set s = new HashSet();
+
+ s.add (attribute);
+ return getRunStart (s);
+ }
+
+ public Object clone()
+ {
+ return new FormatCharacterIterator (formattedString, ranges, attributes);
+ }
+
+ /*
+ * The following methods are inherited from CharacterIterator and thus
+ * are already documented.
+ */
+
+ public char current()
+ {
+ return formattedString.charAt (charIndex);
+ }
+
+ public char first()
+ {
+ charIndex = 0;
+ attributeIndex = 0;
+ return formattedString.charAt (0);
+ }
+
+ public int getBeginIndex()
+ {
+ return 0;
+ }
+
+ public int getEndIndex()
+ {
+ return formattedString.length();
+ }
+
+ public int getIndex()
+ {
+ return charIndex;
+ }
+
+ public char last()
+ {
+ charIndex = formattedString.length()-1;
+ if (attributes != null)
+ attributeIndex = attributes.length-1;
+ return formattedString.charAt (charIndex);
+ }
+
+ public char next()
+ {
+ charIndex++;
+ if (charIndex >= formattedString.length())
+ {
+ charIndex = getEndIndex();
+ return DONE;
+ }
+ if (attributes != null)
+ {
+ if (charIndex >= ranges[attributeIndex])
+ attributeIndex++;
+ }
+ return formattedString.charAt (charIndex);
+ }
+
+ public char previous()
+ {
+ charIndex--;
+ if (charIndex < 0)
+ {
+ charIndex = 0;
+ return DONE;
+ }
+
+ if (attributes != null)
+ {
+ if (charIndex < ranges[attributeIndex])
+ attributeIndex--;
+ }
+ return formattedString.charAt (charIndex);
+ }
+
+ public char setIndex (int position)
+ {
+ if (position < 0 || position > formattedString.length())
+ throw new IllegalArgumentException ("position is out of range");
+
+ charIndex = position;
+ if (attributes != null)
+ {
+ for (attributeIndex=0;attributeIndex<attributes.length;
+ attributeIndex++)
+ if (ranges[attributeIndex] > charIndex)
+ break;
+ attributeIndex--;
+ }
+ if (charIndex == formattedString.length())
+ return DONE;
+ else
+ return formattedString.charAt (charIndex);
+ }
+
+ /**
+ * This method merge the specified attributes and ranges with the
+ * internal tables. This method is in charge of the optimization
+ * of tables. Two following sets of attributes are never the same.
+ *
+ * @see #FormatCharacterIterator()
+ *
+ * @param attributes the new array attributes to apply to the string.
+ */
+ public void mergeAttributes (HashMap[] attributes, int[] ranges)
+ {
+ Vector new_ranges = new Vector();
+ Vector new_attributes = new Vector();
+ int i = 0, j = 0;
+
+ debug("merging " + attributes.length + " attrs");
+
+ while (i < this.ranges.length && j < ranges.length)
+ {
+ if (this.attributes[i] != null)
+ {
+ new_attributes.add (this.attributes[i]);
+ if (attributes[j] != null)
+ this.attributes[i].putAll (attributes[j]);
+ }
+ else
+ {
+ new_attributes.add (attributes[j]);
+ }
+ if (this.ranges[i] == ranges[j])
+ {
+ new_ranges.add (new Integer (ranges[j]));
+ i++;
+ j++;
+ }
+ else if (this.ranges[i] < ranges[j])
+ {
+ new_ranges.add (new Integer (this.ranges[i]));
+ i++;
+ }
+ else
+ {
+ new_ranges.add (new Integer (ranges[j]));
+ j++;
+ }
+ }
+
+ if (i != this.ranges.length)
+ {
+ for (;i<this.ranges.length;i++)
+ {
+ new_attributes.add (this.attributes[i]);
+ new_ranges.add (new Integer (this.ranges[i]));
+ }
+ }
+ if (j != ranges.length)
+ {
+ for (;j<ranges.length;j++)
+ {
+ new_attributes.add (attributes[j]);
+ new_ranges.add (new Integer (ranges[j]));
+ }
+ }
+
+ this.attributes = new HashMap[new_attributes.size()];
+ this.ranges = new int[new_ranges.size()];
+ System.arraycopy (new_attributes.toArray(), 0, this.attributes,
+ 0, this.attributes.length);
+
+ for (i=0;i<new_ranges.size();i++)
+ {
+ this.ranges[i] = ((Integer)new_ranges.elementAt (i)).intValue();
+ }
+
+ dumpTable();
+ }
+
+ /**
+ * This method appends to the internal attributed string the attributed
+ * string contained in the specified iterator.
+ *
+ * @param iterator the iterator which contains the attributed string to
+ * append to this iterator.
+ */
+ public void append (AttributedCharacterIterator iterator)
+ {
+ char c = iterator.first();
+ Vector more_ranges = new Vector();
+ Vector more_attributes = new Vector();
+
+ do
+ {
+ formattedString = formattedString + String.valueOf (c);
+ // TODO: Reduce the size of the output array.
+ more_attributes.add (iterator.getAttributes());
+ more_ranges.add (new Integer (formattedString.length()));
+ // END TOOD
+ c = iterator.next();
+ }
+ while (c != DONE);
+
+ HashMap[] new_attributes = new HashMap[attributes.length
+ + more_attributes.size()];
+ int[] new_ranges = new int[ranges.length + more_ranges.size()];
+
+ System.arraycopy (attributes, 0, new_attributes, 0, attributes.length);
+ System.arraycopy (more_attributes.toArray(), 0, new_attributes,
+ attributes.length, more_attributes.size());
+
+ System.arraycopy (ranges, 0, new_ranges, 0, ranges.length);
+ Object[] new_ranges_array = more_ranges.toArray();
+ for (int i = 0; i < more_ranges.size();i++)
+ new_ranges[i+ranges.length] = ((Integer) new_ranges_array[i]).intValue();
+
+ attributes = new_attributes;
+ ranges = new_ranges;
+ }
+
+ /**
+ * This method appends an attributed string which attributes are specified
+ * directly in the calling parameters.
+ *
+ * @param text The string to append.
+ * @param local_attributes The attributes to put on this string in the
+ * iterator. If it is <code>null</code> the string will simply have no
+ * attributes.
+ */
+ public void append (String text, HashMap local_attributes)
+ {
+ int[] new_ranges = new int[ranges.length+1];
+ HashMap[] new_attributes = new HashMap[attributes.length+1];
+
+ formattedString += text;
+ System.arraycopy (attributes, 0, new_attributes, 0, attributes.length);
+ System.arraycopy (ranges, 0, new_ranges, 0, ranges.length);
+ new_ranges[ranges.length] = formattedString.length();
+ new_attributes[attributes.length] = local_attributes;
+
+ ranges = new_ranges;
+ attributes = new_attributes;
+ }
+
+ /**
+ * This method appends a string without attributes. It is completely
+ * equivalent to call {@link #append(String,HashMap)} with local_attributes
+ * equal to <code>null</code>.
+ *
+ * @param text The string to append to the iterator.
+ */
+ public void append (String text)
+ {
+ append (text, null);
+ }
+
+ /**
+ * This method adds a set of attributes to a range of character. The
+ * bounds are always inclusive. In the case many attributes have to
+ * be added it is advised to directly use {@link #mergeAttributes([Ljava.util.HashMap;[I}
+ *
+ * @param attributes Attributes to merge into the iterator.
+ * @param range_start Lower bound of the range of characters which will receive the
+ * attribute.
+ * @param range_end Upper bound of the range of characters which will receive the
+ * attribute.
+ *
+ * @throws IllegalArgumentException if ranges are out of bounds.
+ */
+ public void addAttributes(HashMap attributes, int range_start, int range_end)
+ {
+ if (range_start == 0)
+ mergeAttributes(new HashMap[] { attributes }, new int[] { range_end });
+ else
+ mergeAttributes(new HashMap[] { null, attributes }, new int[] { range_start, range_end });
+ }
+
+ private void debug(String s)
+ {
+ if (DEBUG)
+ System.out.println(s);
+ }
+
+ private void dumpTable()
+ {
+ int start_range = 0;
+
+ if (!DEBUG)
+ return;
+
+ System.out.println("Dumping internal table:");
+ for (int i = 0; i < ranges.length; i++)
+ {
+ System.out.print("\t" + start_range + " => " + ranges[i] + ":");
+ if (attributes[i] == null)
+ System.out.println("null");
+ else
+ {
+ Set keyset = attributes[i].keySet();
+ if (keyset != null)
+ {
+ Iterator keys = keyset.iterator();
+
+ while (keys.hasNext())
+ System.out.print(" " + keys.next());
+ }
+ else
+ System.out.println("keySet null");
+ System.out.println();
+ }
+ }
+ System.out.println();
+ System.out.flush();
+ }
+}