Added source for ByteEdit

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

@@ -0,0 +1,179 @@
+/*
+ * 08/13/2009
+ *
+ * TipUtil.java - Utility methods for homemade tool tips.
+ * 
+ * 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.Font;
+import java.awt.SystemColor;
+import java.net.URL;
+import javax.swing.BorderFactory;
+import javax.swing.JEditorPane;
+import javax.swing.UIManager;
+import javax.swing.border.Border;
+import javax.swing.plaf.ColorUIResource;
+import javax.swing.text.html.HTMLDocument;
+
+
+/**
+ * Static utility methods for homemade tool tips.<p>
+ *
+ * This is blatantly ripped off from RSyntaxTextArea's "FocusableTips" class
+ * of the same name, but isn't re-used to prevent a hard dependency on the
+ * RSTA library.
+ *
+ * @author Robert Futrell
+ * @version 1.0
+ */
+class TipUtil {
+
+
+	private TipUtil() {
+	}
+
+
+	/**
+	 * Returns the default background color to use for tool tip windows.
+	 *
+	 * @return The default background color.
+	 */
+	public static Color getToolTipBackground() {
+
+		Color c = UIManager.getColor("ToolTip.background");
+
+		// Tooltip.background is wrong color on Nimbus (!)
+		boolean isNimbus = isNimbusLookAndFeel();
+		if (c==null || isNimbus) {
+			c = UIManager.getColor("info"); // Used by Nimbus (and others)
+			if (c==null || (isNimbus && isDerivedColor(c))) {
+				c = SystemColor.info; // System default
+			}
+		}
+
+		// Workaround for a bug (?) with Nimbus - calling JLabel.setBackground()
+		// with a ColorUIResource does nothing, must be a normal Color
+		if (c instanceof ColorUIResource) {
+			c = new Color(c.getRGB());
+		}
+
+		return c;
+
+	}
+
+
+	/**
+	 * Returns the border used by tool tips in this look and feel.
+	 *
+	 * @return The border.
+	 */
+	public static Border getToolTipBorder() {
+
+		Border border = UIManager.getBorder("ToolTip.border");
+
+		if (border==null || isNimbusLookAndFeel()) {
+			border = UIManager.getBorder("nimbusBorder");
+			if (border==null) {
+				border = BorderFactory.createLineBorder(SystemColor.controlDkShadow);
+			}
+		}
+
+		return border;
+
+	}
+
+
+	/**
+	 * Returns whether a color is a Nimbus DerivedColor, which is troublesome
+	 * in that it doesn't use its RGB values (uses HSB instead?) and so
+	 * querying them is useless.
+	 *
+	 * @param c The color to check.
+	 * @return Whether it is a DerivedColor
+	 */
+	private static final boolean isDerivedColor(Color c) {
+		return c!=null && (c.getClass().getName().endsWith(".DerivedColor") ||
+				c.getClass().getName().endsWith(".DerivedColor$UIResource"));
+	}
+
+
+	/**
+	 * Returns whether the Nimbus Look and Feel is installed.
+	 *
+	 * @return Whether the current LAF is Nimbus.
+	 */
+	private static final boolean isNimbusLookAndFeel() {
+		return UIManager.getLookAndFeel().getName().equals("Nimbus");
+	}
+
+
+	/**
+	 * Tweaks a <code>JEditorPane</code> so it can be used to render the
+	 * content in a focusable pseudo-tool tip.  It is assumed that the editor
+	 * pane is using an <code>HTMLDocument</code>.
+	 *
+	 * @param textArea The editor pane to tweak.
+	 */
+	public static void tweakTipEditorPane(JEditorPane textArea) {
+
+		// Jump through a few hoops to get things looking nice in Nimbus
+		boolean isNimbus = isNimbusLookAndFeel();
+		if (isNimbus) {
+			Color selBG = textArea.getSelectionColor();
+			Color selFG = textArea.getSelectedTextColor();
+			textArea.setUI(new javax.swing.plaf.basic.BasicEditorPaneUI());
+			textArea.setSelectedTextColor(selFG);
+			textArea.setSelectionColor(selBG);
+		}
+
+		textArea.setEditable(false); // Required for links to work!
+		textArea.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
+
+		// Make selection visible even though we are not (initially) focusable.
+		textArea.getCaret().setSelectionVisible(true);
+
+		// Set the foreground color.  Important because when rendering HTML,
+		// default foreground becomes black, which may not match all LAF's
+		// (e.g. Substance).
+		Color fg = UIManager.getColor("Label.foreground");
+		if (fg==null || (isNimbus && isDerivedColor(fg))) {
+			fg = SystemColor.textText;
+		}
+		textArea.setForeground(fg);
+
+		// Make it use the "tool tip" background color.
+		textArea.setBackground(TipUtil.getToolTipBackground());
+
+		// Force JEditorPane to use a certain font even in HTML.
+		// All standard LookAndFeels, even Nimbus (!), define Label.font.
+		Font font = UIManager.getFont("Label.font");
+		if (font == null) { // Try to make a sensible default
+			font = new Font("SansSerif", Font.PLAIN, 12);
+		}
+		HTMLDocument doc = (HTMLDocument) textArea.getDocument();
+		doc.getStyleSheet().addRule(
+				"body { font-family: " + font.getFamily() +
+						"; font-size: " + font.getSize() + "pt" +
+						"; color: " + Util.getHexString(fg) + "; }");
+
+		// Always add link foreground rule.  Unfortunately these CSS rules
+		// stack each time the LaF is changed (how can we overwrite them
+		// without clearing out the important "standard" ones?).
+		Color linkFG = Util.getHyperlinkForeground();
+		doc.getStyleSheet().addRule(
+				"a { color: " + Util.getHexString(linkFG) + "; }");
+
+		URL url = TipUtil.class.getResource("bullet_black.png");
+		if (url!=null) {
+			doc.getStyleSheet().addRule(
+				"ul { list-style-image: '" + url.toString() + "'; }");
+		}
+
+	}
+
+
+}