6857057: api/javax_swing/text/GlyphView/index.html#Methods test fails

Reviewed-by: peterz

src/share/classes/javax/swing/text/Utilities.java

@@ -403,6 +403,24 @@ public class Utilities {
         return txtCount;
     }
 
+    /**
+     * Adjust text offset so that the length of a resulting string as a whole
+     * fits into the specified width.
+     */
+    static int adjustOffsetForFractionalMetrics(
+            Segment s, FontMetrics fm, int offset, int width) {
+        // Sometimes the offset returned by getTabbedTextOffset is beyond the
+        // available area, when fractional metrics are enabled. We should
+        // guard against this.
+        if (offset < s.count) {
+            while (offset > 0 &&
+                    fm.charsWidth(s.array, s.offset, offset + 1) > width) {
+                offset--;
+            }
+        }
+        return offset;
+    }
+
     /**
      * Determine where to break the given text to fit
      * within the given span. This tries to find a word boundary.
@@ -425,7 +443,7 @@ public class Utilities {
         int txtCount = s.count;
         int index = Utilities.getTabbedTextOffset(s, metrics, x0, x,
                                                   e, startOffset, false);
-
+        index = adjustOffsetForFractionalMetrics(s, metrics, index, x - x0);
 
         if (index >= txtCount - 1) {
             return txtCount;

src/share/classes/javax/swing/text/WrappedPlainView.java

@@ -239,9 +239,11 @@ public class WrappedPlainView extends BoxView implements TabExpander {
                                                 tabBase, tabBase + currentWidth,
                                                 this, p0);
         } else {
-            p = p0 + Utilities.getTabbedTextOffset(segment, metrics,
-                                                   tabBase, tabBase + currentWidth,
-                                                   this, p0, false);
+            int offset = Utilities.getTabbedTextOffset(segment, metrics,
+                    tabBase, tabBase + currentWidth, this, p0, false);
+            offset = Utilities.adjustOffsetForFractionalMetrics(
+                    segment, metrics, offset, currentWidth);
+            p = p0 + offset;
         }
         SegmentCache.releaseSharedSegment(segment);
         return p;

test/javax/swing/text/WrappedPlainView/6857057/StubBranchElement.java

+/*
+ * Copyright 2010 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+import javax.swing.text.*;
+
+class StubBranchElement implements Element {
+    Document document = new DefaultStyledDocument();
+    String context;
+    Element[] children = new StubLeafElement[3];
+
+    public StubBranchElement(String context) {
+        this.context = context;
+        int len = context.length() / 3;
+        for (int i = 0; i < 3; i++) {
+            children[i] = new StubLeafElement(
+                    context.substring(len * i, len * (i + 1)), this, len * i);
+        }
+        try {
+            document.insertString(0, context, new SimpleAttributeSet());
+        } catch (BadLocationException e) {
+        }
+    }
+
+    public Document getDocument() {
+        return document;
+    }
+
+    public Element getParentElement() {
+        return null;
+    }
+
+    public String getName() {
+        return "StubBranchElement";
+    }
+
+    public AttributeSet getAttributes() {
+        return new SimpleAttributeSet();
+    }
+
+    public int getStartOffset() {
+        return 0;
+    }
+
+    public int getEndOffset() {
+        return document.getLength();
+    }
+
+    public int getElementIndex(int offset) {
+        return offset / 3;
+    }
+
+    public int getElementCount() {
+        return 3;
+    }
+
+    public Element getElement(int index) {
+        return children[index];
+    }
+
+    public boolean isLeaf() {
+        return false;
+    }
+
+    public Element[] getChildren() {
+        return children;
+    }
+}

test/javax/swing/text/WrappedPlainView/6857057/StubLeafElement.java

+/*
+ * Copyright 2010 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+import javax.swing.text.*;
+
+class StubLeafElement implements Element {
+    Document document = new DefaultStyledDocument();
+    String context;
+    Element parent;
+    int position;
+
+    public StubLeafElement(String context, Element parent, int position) {
+        this.context = context;
+        this.parent = parent;
+        this.position = position;
+        try {
+            document.insertString(0, context, new SimpleAttributeSet());
+        } catch (BadLocationException e) {
+        }
+    }
+
+    public Document getDocument() {
+        return document;
+    }
+
+    public Element getParentElement() {
+        return parent;
+    }
+
+    public String getName() {
+        return "StubLeafElement";
+    }
+
+    public AttributeSet getAttributes() {
+        return new SimpleAttributeSet();
+    }
+
+    public int getStartOffset() {
+        return position;
+    }
+
+    public int getEndOffset() {
+        return position + document.getLength();
+    }
+
+    public int getElementIndex(int offset) {
+        return 0;
+    }
+
+    public int getElementCount() {
+        return 0;
+    }
+
+    public Element getElement(int index) {
+        return this;
+    }
+
+    public boolean isLeaf() {
+        return true;
+    }
+}

test/javax/swing/text/WrappedPlainView/6857057/bug6857057.java

+/*
+ * Copyright 2010 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ * @test
+ * @bug 6857057
+ * @summary test that the JCK GlyphView2021 test doesn't fail
+ * @author Sergey Groznyh
+ * @run main bug6857057
+ */
+
+import javax.swing.*;
+import javax.swing.text.Element;
+import javax.swing.text.GlyphView;
+import javax.swing.text.View;
+
+public class bug6857057 {
+
+    bug6857057() {
+        Element elem = new StubBranchElement(" G L Y P H V");
+        GlyphView view = new GlyphView(elem);
+        float pos = elem.getStartOffset();
+        float len = elem.getEndOffset() - pos;
+        int res = view.getBreakWeight(View.X_AXIS, pos, len);
+        if (res != View.ExcellentBreakWeight) {
+            throw new RuntimeException("breakWeight != ExcellentBreakWeight");
+        }
+    }
+
+    public static void main(String[] args) throws Throwable {
+        SwingUtilities.invokeLater(new Runnable() {
+            public void run() {
+                new bug6857057();
+            }
+        });
+
+        System.out.println("OK");
+    }
+}