1 files changed, 100 insertions, 0 deletions

diff --git a/libjava/javax/swing/text/DefaultHighlighter.java b/libjava/javax/swing/text/DefaultHighlighter.java
index 003d17d1a8e..234fcad60ff 100644
--- a/libjava/javax/swing/text/DefaultHighlighter.java
+++ b/libjava/javax/swing/text/DefaultHighlighter.java
@@ -38,7 +38,9 @@ exception statement from your version. */
 
 package javax.swing.text;
 
+import java.awt.Color;
 import java.awt.Graphics;
+import java.awt.Rectangle;
 import java.awt.Shape;
 import java.util.Vector;
 
@@ -48,6 +50,87 @@ import javax.swing.text.View;
 
 public class DefaultHighlighter extends LayeredHighlighter
 {
+  public static class DefaultHighlightPainter
+    extends LayerPainter
+  {
+    private Color color;
+    
+    public DefaultHighlightPainter(Color c)
+    {
+      super();
+      color = c;
+    }
+
+    public Color getColor()
+    {
+      return color;
+    }
+
+    private void paintHighlight(Graphics g, Rectangle rect)
+    {
+      g.fillRect(rect.x, rect.y, rect.width, rect.height);
+    }
+    
+    public void paint(Graphics g, int p0, int p1, Shape bounds,
+		      JTextComponent c)
+    {
+      Rectangle r0 = null;
+      Rectangle r1 = null;
+      Rectangle rect = bounds.getBounds();
+      
+      try
+	{
+	  r0 = c.modelToView(p0);
+	  r1 = c.modelToView(p1);
+	}
+      catch (BadLocationException e)
+        {
+	  // This should never occur.
+          return;
+	}
+
+      if (r0 == null || r1 == null)
+	return;
+
+      if (color == null)
+	g.setColor(c.getSelectionColor());
+      else
+	g.setColor(color);
+
+      // Check if only one line to highlight.
+      if (r0.y == r1.y)
+	{
+	  r0.width = r1.x - r0.x;
+	  paintHighlight(g, r0);
+	  return;
+	}
+
+      // First line, from p0 to end-of-line.
+      r0.width = rect.x + rect.width - r0.x;
+      paintHighlight(g, r0);
+      
+      // FIXME: All the full lines in between, if any (assumes that all lines
+      // have the same height -- not a good assumption with JEditorPane/JTextPane).
+      r0.y += r0.height;
+      r0.x = rect.x;
+
+      while (r0.y < r1.y)
+	{
+	  paintHighlight(g, r0);
+	  r0.y += r0.height;
+	}
+
+      // Last line, from beginnin-of-line to p1.
+      paintHighlight(g, r1);
+    }
+
+    public Shape paintLayer(Graphics g, int p0, int p1, Shape bounds,
+			    JTextComponent c, View view)
+    {
+      throw new InternalError();
+    }
+  }
+  
   private class HighlightEntry
   {
     int p0;
@@ -77,6 +160,12 @@ public class DefaultHighlighter extends LayeredHighlighter
     }
   }
 
+  /**
+   * @specnote final as of 1.4
+   */
+  public static final LayeredHighlighter.LayerPainter DefaultPainter =
+    new DefaultHighlightPainter(null);
+  
   private JTextComponent textComponent;
   private Vector highlights = new Vector();
   
@@ -146,5 +235,16 @@ public class DefaultHighlighter extends LayeredHighlighter
 
   public void paint(Graphics g)
   {
+    // Check if there are any highlights.
+    if (highlights.size() == 0)
+      return;
+    
+    Shape bounds = textComponent.getBounds();
+    
+    for (int index = 0; index < highlights.size(); ++index)
+      {
+	HighlightEntry entry = (HighlightEntry) highlights.get(index);
+	entry.painter.paint(g, entry.p0, entry.p1, bounds, textComponent);
+      }
   }
 }