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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/java/text/AttributedFormatBuffer.java | |
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Diffstat (limited to 'libjava/classpath/gnu/java/text/AttributedFormatBuffer.java')
-rw-r--r-- | libjava/classpath/gnu/java/text/AttributedFormatBuffer.java | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/text/AttributedFormatBuffer.java b/libjava/classpath/gnu/java/text/AttributedFormatBuffer.java new file mode 100644 index 000000000..2a89ae097 --- /dev/null +++ b/libjava/classpath/gnu/java/text/AttributedFormatBuffer.java @@ -0,0 +1,251 @@ +/* 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., 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 gnu.java.lang.CPStringBuilder; + +import java.text.AttributedCharacterIterator; +import java.util.ArrayList; +import java.util.HashMap; + +/** + * This class is an implementation of a FormatBuffer with attributes. + * Note that this class is not thread-safe; external synchronisation + * should be used if an instance is to be accessed from multiple threads. + * + * @author Guilhem Lavaux <guilhem@kaffe.org> + * @date April 10, 2004 + */ +public class AttributedFormatBuffer implements FormatBuffer +{ + private final CPStringBuilder buffer; + private final ArrayList ranges; + private final 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(CPStringBuilder buffer) + { + this.buffer = new CPStringBuilder(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 CPStringBuilder(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 attr 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 CPStringBuilder describing + * the attributed string. + * + * @return An instance of CPStringBuilder which contains the string. + */ + public CPStringBuilder 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; + } +} |