8014863: Line break calculations in Java 7 are incorrect

Reviewed-by: alexp, alexsch

jdk/src/share/classes/javax/swing/text/View.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1174,6 +1174,7 @@ public abstract class View implements SwingConstants {
         // formed by added elements (i.e. they will be updated
         // by initialization.
         index0 = Math.max(index0, 0);
+        index1 = getViewIndex(elem.getDocument().getLength(), Position.Bias.Forward);
         for (int i = index0; i <= index1; i++) {
             if (! ((i >= hole0) && (i <= hole1))) {
                 v = getView(i);

jdk/test/javax/swing/text/View/8014863/bug8014863.java

@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8014863
+ * @summary  Tests the calculation of the line breaks when a text is inserted
+ * @author Dmitry Markov
+ * @library ../../../regtesthelpers
+ * @build Util
+ * @run main bug8014863
+ */
+
+import sun.awt.SunToolkit;
+
+import javax.swing.*;
+import javax.swing.text.html.HTMLEditorKit;
+import java.awt.*;
+import java.awt.event.KeyEvent;
+
+public class bug8014863 {
+
+    private static JEditorPane editorPane;
+    private static Robot robot;
+    private static SunToolkit toolkit;
+
+    public static void main(String[] args) throws Exception {
+        toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
+        robot = new Robot();
+
+        createAndShowGUI();
+
+        toolkit.realSync();
+
+        Util.hitKeys(robot, KeyEvent.VK_HOME);
+        Util.hitKeys(robot, KeyEvent.VK_O);
+
+        toolkit.realSync();
+
+        if (3 != getNumberOfTextLines()) {
+            throw new RuntimeException("The number of texts lines does not meet the expectation");
+        }
+
+        Util.hitKeys(robot, KeyEvent.VK_N);
+
+        toolkit.realSync();
+
+        if (3 != getNumberOfTextLines()) {
+            throw new RuntimeException("The number of texts lines does not meet the expectation");
+        }
+
+        Util.hitKeys(robot, KeyEvent.VK_E);
+        Util.hitKeys(robot, KeyEvent.VK_SPACE);
+        Util.hitKeys(robot, KeyEvent.VK_T);
+        Util.hitKeys(robot, KeyEvent.VK_W);
+
+        toolkit.realSync();
+
+        if (3 != getNumberOfTextLines()) {
+            throw new RuntimeException("The number of texts lines does not meet the expectation");
+        }
+    }
+
+    private static int getNumberOfTextLines() throws Exception {
+        int numberOfLines = 0;
+        int caretPosition = getCaretPosition();
+        int current = 1;
+        int previous;
+
+        setCaretPosition(current);
+        do {
+            previous = current;
+            Util.hitKeys(robot, KeyEvent.VK_DOWN);
+            toolkit.realSync();
+            current = getCaretPosition();
+            numberOfLines++;
+        } while (current != previous);
+
+        setCaretPosition(caretPosition);
+        return numberOfLines;
+    }
+
+    private static int getCaretPosition() throws Exception {
+        final int[] result = new int[1];
+        SwingUtilities.invokeAndWait(new Runnable() {
+            public void run() {
+                result[0] = editorPane.getCaretPosition();
+            }
+        });
+        return result[0];
+    }
+
+    private static void setCaretPosition(final int position) throws Exception {
+        SwingUtilities.invokeAndWait(new Runnable() {
+            public void run() {
+                editorPane.setCaretPosition(position);
+            }
+        });
+    }
+
+    private static void createAndShowGUI() throws Exception {
+        SwingUtilities.invokeAndWait(new Runnable() {
+            public void run() {
+                try {
+                    UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
+                } catch (Exception ex) {
+                    throw new RuntimeException(ex);
+                }
+                JFrame frame = new JFrame();
+                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+
+                editorPane = new JEditorPane();
+                HTMLEditorKit editorKit = new HTMLEditorKit();
+                editorPane.setEditorKit(editorKit);
+                editorPane.setText("<p>qqqq <em>pp</em> qqqq <em>pp</em> " +
+                        "qqqq <em>pp</em> qqqq <em>pp</em> qqqq <em>pp</em> qqqq <em>pp" +
+                        "</em> qqqq <em>pp</em> qqqq <em>pp</em> qqqq <em>pp</em> qqqq</p>");
+                editorPane.setCaretPosition(1);
+
+                frame.add(editorPane);
+                frame.setSize(200, 200);
+                frame.setVisible(true);
+            }
+        });
+    }
+}