1 files changed, 148 insertions, 0 deletions
diff --git a/libjava/classpath/java/awt/font/LineBreakMeasurer.java b/libjava/classpath/java/awt/font/LineBreakMeasurer.java
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+/* LineBreakMeasurer.java
+   Copyright (C) 2006 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.awt.font;
+
+import java.text.AttributedCharacterIterator;
+import java.text.BreakIterator;
+
+public final class LineBreakMeasurer
+{
+  private AttributedCharacterIterator text;
+  private int position;
+  private TextMeasurer tm;
+  private int numChars;
+
+  public LineBreakMeasurer(AttributedCharacterIterator text,
+                           BreakIterator breakIter, FontRenderContext frc)
+  {
+    this( text, frc );
+  }
+
+  public LineBreakMeasurer(AttributedCharacterIterator text,
+                           FontRenderContext frc)
+  {
+    this.text = text;
+    position = 0;
+    numChars = text.getEndIndex();
+    tm = new TextMeasurer( text, frc );
+  }
+
+  public void deleteChar(AttributedCharacterIterator newParagraph,
+                         int deletePos)
+  {
+    tm.deleteChar( newParagraph, deletePos );
+    position = 0;
+  }
+
+  public void insertChar(AttributedCharacterIterator newParagraph,
+                         int insertPos)
+  {
+    tm.insertChar( newParagraph, insertPos );
+    position = 0;
+  }
+
+  public TextLayout nextLayout(float wrappingWidth)
+  {
+    return nextLayout( wrappingWidth, numChars, false );
+  }
+
+  public TextLayout nextLayout(float wrappingWidth, int offsetLimit,
+                               boolean requireNextWord)
+  {
+    int next = nextOffset( wrappingWidth, offsetLimit, requireNextWord );
+    TextLayout tl = tm.getLayout( position, next );
+    position = next;
+    return tl;
+  }
+
+  public int nextOffset(float wrappingWidth)
+  {
+    return nextOffset( wrappingWidth, numChars, false );
+  }
+
+  public int nextOffset(float wrappingWidth, int offsetLimit,
+                        boolean requireNextWord)
+  {
+    int guessOffset = tm.getLineBreakIndex(position, wrappingWidth);
+    if( offsetLimit > numChars )
+      offsetLimit = numChars;
+
+    if( guessOffset > offsetLimit )
+      {
+        text.setIndex( offsetLimit );
+        return offsetLimit;
+      }
+
+    text.setIndex( guessOffset );
+
+    // If we're on a breaking character, return directly
+    if( Character.isWhitespace( text.current() ) )
+      return guessOffset;
+
+    // Otherwise jump forward or backward to the last such char.
+    if( !requireNextWord )
+      while( !Character.isWhitespace( text.previous() ) &&
+             guessOffset > position )
+        guessOffset--;
+    else
+      while( !Character.isWhitespace( text.next() ) &&
+             guessOffset < offsetLimit )
+        guessOffset++;
+
+    if( guessOffset > offsetLimit )
+      {
+        text.setIndex( offsetLimit );
+        return offsetLimit;
+      }
+
+    text.setIndex( guessOffset );
+
+    return guessOffset;
+  }
+
+  public void setPosition(int newPosition)
+  {
+    position = newPosition;
+  }
+
+  public int getPosition()
+  {
+    return position;
+  }
+}