Imported GNU Classpath 0.90

Imported GNU Classpath 0.90
       * scripts/makemake.tcl: Set gnu/java/awt/peer/swing to ignore.
       * gnu/classpath/jdwp/VMFrame.java (SIZE): New constant.
       * java/lang/VMCompiler.java: Use gnu.java.security.hash.MD5.
       * java/lang/Math.java: New override file.
       * java/lang/Character.java: Merged from Classpath.
       (start, end): Now 'int's.
       (canonicalName): New field.
       (CANONICAL_NAME, NO_SPACES_NAME, CONSTANT_NAME): New constants.
       (UnicodeBlock): Added argument.
       (of): New overload.
       (forName): New method.
       Updated unicode blocks.
       (sets): Updated.
       * sources.am: Regenerated.
       * Makefile.in: Likewise.

From-SVN: r111942

libjava/classpath/javax/swing/text/Utilities.java

@@ -41,12 +41,8 @@ package javax.swing.text;
 import java.awt.FontMetrics;
 import java.awt.Graphics;
 import java.awt.Point;
-import java.awt.Rectangle;
 import java.text.BreakIterator;
 
-import javax.swing.SwingConstants;
-import javax.swing.SwingUtilities;
-
 /**
  * A set of utilities to deal with text. This is used by several other classes
  * inside this package.
@@ -73,6 +69,10 @@ public class Utilities
    * are taken into account. Tabs are expanded using the
    * specified {@link TabExpander}.
    *
+   *
+   * The X and Y coordinates denote the start of the <em>baseline</em> where
+   * the text should be drawn.
+   *
    * @param s the text fragment to be drawn.
    * @param x the x position for drawing.
    * @param y the y position for drawing.
@@ -88,15 +88,14 @@ public class Utilities
     // This buffers the chars to be drawn.
     char[] buffer = s.array;
 
-
-    // The current x and y pixel coordinates.
-    int pixelX = x;
-    int pixelY = y;
-
     // The font metrics of the current selected font.
     FontMetrics metrics = g.getFontMetrics();
     int ascent = metrics.getAscent();
 
+    // The current x and y pixel coordinates.
+    int pixelX = x;
+    int pixelY = y - ascent;
+
     int pixelWidth = 0;
     int pos = s.offset;
     int len = 0;
@@ -238,9 +237,10 @@ public class Utilities
     int pos;
     int currentX = x0;
 
-    for (pos = p0; pos < s.count; pos++)
+    for (pos = 0; pos < s.count; pos++)
       {
         char nextChar = s.array[s.offset+pos];
+        
         if (nextChar == 0)
           {
             if (! round)
@@ -256,6 +256,7 @@ public class Utilities
             else
               currentX = (int) te.nextTabStop(currentX, pos);
           }
+        
         if (currentX > x)
           {
             if (! round)
@@ -263,7 +264,8 @@ public class Utilities
             break;
           }
       }
-    return pos;
+    
+    return pos + p0;
   }
 
   /**
@@ -510,10 +512,10 @@ public class Utilities
   {
     int mark = Utilities.getTabbedTextOffset(s, metrics, x0, x, e, startOffset);
     BreakIterator breaker = BreakIterator.getWordInstance();
-    breaker.setText(s.toString());
-    
+    breaker.setText(s);
+
     // If mark is equal to the end of the string, just use that position
-    if (mark == s.count)
+    if (mark == s.count + s.offset)
       return mark;
     
     // Try to find a word boundary previous to the mark at which we 
@@ -571,15 +573,29 @@ public class Utilities
   public static final int getPositionAbove(JTextComponent c, int offset, int x)
     throws BadLocationException
   {
-    View rootView = c.getUI().getRootView(c);
-    Rectangle r = c.modelToView(offset);
-    int offs = c.viewToModel(new Point(x, r.y));
-    int pos = rootView.getNextVisualPositionFrom(offs,
-                                    Position.Bias.Forward,
-                                    SwingUtilities.calculateInnerArea(c, null),
-                                    SwingConstants.NORTH,
-                                    new Position.Bias[1]);
-    return pos;
+    int offs = getRowStart(c, offset);
+    
+    if(offs == -1)
+      return -1;
+
+    // Effectively calculates the y value of the previous line.
+    Point pt = c.modelToView(offs-1).getLocation();
+    
+    pt.x = x;
+    
+    // Calculate a simple fitting offset.
+    offs = c.viewToModel(pt);
+    
+    // Find out the real x positions of the calculated character and its
+    // neighbour.
+    int offsX = c.modelToView(offs).getLocation().x;
+    int offsXNext = c.modelToView(offs+1).getLocation().x;
+    
+    // Chose the one which is nearer to us and return its offset.
+    if (Math.abs(offsX-x) <= Math.abs(offsXNext-x))
+      return offs;
+    else
+      return offs+1;
   }
 
   /**
@@ -598,14 +614,31 @@ public class Utilities
   public static final int getPositionBelow(JTextComponent c, int offset, int x)
     throws BadLocationException
   {
-    View rootView = c.getUI().getRootView(c);
-    Rectangle r = c.modelToView(offset);
-    int offs = c.viewToModel(new Point(x, r.y));
-    int pos = rootView.getNextVisualPositionFrom(offs,
-                                    Position.Bias.Forward,
-                                    SwingUtilities.calculateInnerArea(c, null),
-                                    SwingConstants.SOUTH,
-                                    new Position.Bias[1]);
-    return pos;
-  }
+    int offs = getRowEnd(c, offset);
+    
+    if(offs == -1)
+      return -1;
+
+    // Effectively calculates the y value of the previous line.
+    Point pt = c.modelToView(offs+1).getLocation();
+    
+    pt.x = x;
+    
+    // Calculate a simple fitting offset.
+    offs = c.viewToModel(pt);
+    
+    if (offs == c.getDocument().getLength())
+      return offs;
+
+    // Find out the real x positions of the calculated character and its
+    // neighbour.
+    int offsX = c.modelToView(offs).getLocation().x;
+    int offsXNext = c.modelToView(offs+1).getLocation().x;
+    
+    // Chose the one which is nearer to us and return its offset.
+    if (Math.abs(offsX-x) <= Math.abs(offsXNext-x))
+      return offs;
+    else
+      return offs+1;
+    }
 }