Added source for ByteEdit

src/org/fife/ui/autocomplete/OutlineHighlightPainter.java

@@ -0,0 +1,143 @@
+/*
+ * 04/26/2009
+ *
+ * OutlineHighlightPainter.java - Highlight painter that draws an outline
+ * around its text.
+ * 
+ * This library is distributed under a modified BSD license.  See the included
+ * AutoComplete.License.txt file for details.
+ */
+package org.fife.ui.autocomplete;
+
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Rectangle;
+import java.awt.Shape;
+import javax.swing.text.BadLocationException;
+import javax.swing.text.DefaultHighlighter;
+import javax.swing.text.JTextComponent;
+import javax.swing.text.Position;
+import javax.swing.text.View;
+
+
+/**
+ * Highlight painter that draws an outline around the text.  This is used to
+ * draw bounds around function/method parameters.
+ *
+ * @author Robert Futrell
+ * @version 1.0
+ */
+/*
+ * NOTE: Whenever you see text like "Workaround for Java Highlight issues",
+ * this is because highlighted text in a JTextComponent gets "pushed" forward
+ * when the caret is at the Highlight's start, when we need it to instead get
+ * prepended to.  For this reason, the auto-complete package adds its Highlights
+ * 1 char too long (1 char earlier than where it should really start), but only
+ * paint the Highlight from the 2nd char on.
+ */
+class OutlineHighlightPainter extends
+							DefaultHighlighter.DefaultHighlightPainter {
+
+	/**
+	 * DefaultHighlightPainter doesn't allow changing color, so we must cache
+	 * ours here.
+	 */
+	private Color color;
+
+	
+	/**
+	 * Constructor.
+	 *
+	 * @param color The color to draw the bounding boxes with.  This cannot
+	 *        be <code>null</code>.
+	 */
+	public OutlineHighlightPainter(Color color) {
+		super(color);
+		setColor(color);
+	}
+
+
+	/**
+	 * Returns the color to paint bounding boxes with.
+	 *
+	 * @return The color.
+	 * @see #setColor(Color)
+	 */
+	@Override
+	public Color getColor() {
+		return color;
+	}
+
+
+	/**
+	 * {@inheritDoc}
+	 */
+	@Override
+	public Shape paintLayer(Graphics g, int p0, int p1, Shape viewBounds,
+								JTextComponent c, View view) {
+
+		g.setColor(getColor());
+		p0++; // Workaround for Java Highlight issues.
+
+		// This special case isn't needed for most standard Swing Views (which
+		// always return a width of 1 for modelToView() calls), but it is
+		// needed for RSTA views, which actually return the width of chars for
+		// modelToView calls.  But this should be faster anyway, as we
+		// short-circuit and do only one modelToView() for one offset.
+		if (p0==p1) {
+			try {
+				Shape s = view.modelToView(p0, viewBounds,
+											Position.Bias.Forward);
+				Rectangle r = s.getBounds();
+				g.drawLine(r.x, r.y, r.x, r.y+r.height);
+				return r;
+			} catch (BadLocationException ble) {
+				ble.printStackTrace(); // Never happens
+				return null;
+			}
+		}
+
+		if (p0 == view.getStartOffset() && p1 == view.getEndOffset()) {
+			// Contained in view, can just use bounds.
+			Rectangle alloc;
+			if (viewBounds instanceof Rectangle) {
+				alloc = (Rectangle) viewBounds;
+			} else {
+				alloc = viewBounds.getBounds();
+			}
+			g.drawRect(alloc.x, alloc.y, alloc.width - 1, alloc.height - 1);
+			return alloc;
+		}
+
+		// Should only render part of View.
+		try {
+			// --- determine locations ---
+			Shape shape = view.modelToView(p0, Position.Bias.Forward, p1,
+					Position.Bias.Backward, viewBounds);
+			Rectangle r = (shape instanceof Rectangle) ? (Rectangle) shape
+					: shape.getBounds();
+			g.drawRect(r.x, r.y, r.width - 1, r.height - 1);
+			return r;
+		} catch (BadLocationException e) { // Never happens
+			e.printStackTrace();
+			return null;
+		}
+
+	}
+
+
+	/**
+	 * Sets the color to paint the bounding boxes with.
+	 *
+	 * @param color The new color.  This cannot be <code>null</code>.
+	 * @see #getColor()
+	 */
+	public void setColor(Color color) {
+		if (color==null) {
+			throw new IllegalArgumentException("color cannot be null");
+		}
+		this.color = color;
+	}
+
+
+}