JBR-2234 Support CSS setting overflow-wrap:anywhere in JEditorPane

port from JBR 11 to JBR 15 (cherry picked from commits b6583d0a71, 6003abc15f)

cherry picked from commit 93ad4f06dd

also includes JBR-4006 [JCK] javax.swing.text.html.CSS$Attribute.OVERFLOW_WRAP field breaks public API
(cherry picked from commit f20a3d8679)
and JBR-4007 [JCK] javax.swing.text.GlyphView.calcBreakSpots method breaks public API
(cherry picked from commit 1002eff4f3)
(cherry picked from commit f603f9e837)

src/java.desktop/share/classes/javax/swing/text/AbstractDocument.java

@@ -1601,7 +1601,12 @@ public abstract class AbstractDocument implements Document, Serializable {
     /**
      * Document property that indicates if a character has been inserted
      * into the document that is more than one byte long.  GlyphView uses
-     * this to determine if it should use BreakIterator.
+     * this to determine if it should use BreakIterator. This property should
+     * not be publicly exposed, since it is used for implementation convenience
+     * only.  As a side effect, copies of this property may be in its subclasses
+     * that live in different packages (e.g. HTMLDocument as of now), so those
+     * copies should also be taken care of when this property needs to be
+     * modified.
      */
     static final Object MultiByteProperty = "multiByte";
 

src/java.desktop/share/classes/javax/swing/text/GlyphView.java

@@ -32,6 +32,8 @@ import java.util.Locale;
 
 import javax.swing.UIManager;
 import sun.swing.SwingUtilities2;
+import sun.swing.text.GlyphViewAccessor;
+
 import static sun.swing.SwingUtilities2.IMPLIED_CR;
 
 /**
@@ -777,6 +779,41 @@ public class GlyphView extends View implements TabableView, Cloneable {
     private int getBreakSpot(int p0, int p1) {
         if (breakSpots == null) {
             // Re-calculate breakpoints for the whole view
+            BreakIterator breaker = getBreaker();
+            breakSpots = calcBreakSpots(breaker);
+        }
+
+        int breakSpot = BreakIterator.DONE;
+        for (int i = 0; i < breakSpots.length; i++) {
+            int bsp = breakSpots[i];
+            if (bsp <= p1) {
+                if (bsp > p0) {
+                    breakSpot = bsp;
+                }
+                break;
+            }
+        }
+        return breakSpot;
+    }
+
+    static {
+        GlyphViewAccessor.setAccessor(new GlyphViewAccessor() {
+            @Override
+            public int[] calcBreakSpots(GlyphView glyphView, BreakIterator breaker) {
+                return glyphView.calcBreakSpots(breaker);
+            }
+        });
+    }
+
+    // TODO: convert to protected method (removing accessor) when upstreaming the fix
+    /**
+     * Collects all possible breaking positions in the element,
+     * generated by the provided breaker.
+     *
+     * @param breaker provider of break positions
+     * @return possible break positions in the element
+     */
+    int[] calcBreakSpots(BreakIterator breaker) {
         int start = getStartOffset();
         int end = getEndOffset();
         int[] bs = new int[end + 1 - start];
@@ -790,7 +827,6 @@ public class GlyphView extends View implements TabableView, Cloneable {
 
         Segment s = getText(pstart, pend);
         s.first();
-            BreakIterator breaker = getBreaker();
         breaker.setText(s);
 
         // Backward search should start from end+1 unless there's NO end+1
@@ -807,21 +843,9 @@ public class GlyphView extends View implements TabableView, Cloneable {
         }
 
         SegmentCache.releaseSharedSegment(s);
-            breakSpots = new int[ix];
+        int[] result = new int[ix];
-            System.arraycopy(bs, 0, breakSpots, 0, ix);
+        System.arraycopy(bs, 0, result, 0, ix);
-        }
+        return result;
-
-        int breakSpot = BreakIterator.DONE;
-        for (int i = 0; i < breakSpots.length; i++) {
-            int bsp = breakSpots[i];
-            if (bsp <= p1) {
-                if (bsp > p0) {
-                    breakSpot = bsp;
-                }
-                break;
-            }
-        }
-        return breakSpot;
     }
 
     /**

src/java.desktop/share/classes/javax/swing/text/html/CSS.java

@@ -97,6 +97,7 @@ import javax.swing.text.View;
  *   <li>list-style-image
  *   <li>list-style-type
  *   <li>list-style-position
+ *   <li>overflow-wrap
  * </ul>
  * The following are modeled, but currently not rendered.
  * <ul><li>font-variant
@@ -495,6 +496,14 @@ public class CSS implements Serializable {
         public static final Attribute MARGIN_TOP =
             new Attribute("margin-top", "0", false);
 
+        /**
+         * CSS attribute "overflow-wrap".
+         *
+         * TODO: make public when upstreaming the fix
+         */
+        static final Attribute OVERFLOW_WRAP =
+                new Attribute("overflow-wrap", "normal", true);
+
         /**
          * CSS attribute "padding".
          */
@@ -598,7 +607,8 @@ public class CSS implements Serializable {
             PADDING_TOP, TEXT_ALIGN, TEXT_DECORATION, TEXT_INDENT, TEXT_TRANSFORM,
             VERTICAL_ALIGN, WORD_SPACING, WHITE_SPACE, WIDTH,
             BORDER_SPACING, CAPTION_SIDE,
-            MARGIN_LEFT_LTR, MARGIN_LEFT_RTL, MARGIN_RIGHT_LTR, MARGIN_RIGHT_RTL
+            MARGIN_LEFT_LTR, MARGIN_LEFT_RTL, MARGIN_RIGHT_LTR, MARGIN_RIGHT_RTL,
+            OVERFLOW_WRAP
         };
 
         private static final Attribute[] ALL_MARGINS =

src/java.desktop/share/classes/javax/swing/text/html/HTMLDocument.java

@@ -1894,6 +1894,13 @@ public class HTMLDocument extends DefaultStyledDocument {
      */
     private static final String I18NProperty = "i18n";
 
+    /**
+     * Multi-byte property key.
+     *
+     * @see AbstractDocument#MultiByteProperty
+     */
+    static final String MultiByteProperty = "multiByte";
+
     static {
         contentAttributeSet = new SimpleAttributeSet();
         ((MutableAttributeSet)contentAttributeSet).

src/java.desktop/share/classes/javax/swing/text/html/InlineView.java

@@ -24,8 +24,11 @@
  */
 package javax.swing.text.html;
 
+import sun.swing.text.GlyphViewAccessor;
+
 import java.awt.*;
 import java.text.BreakIterator;
+import java.util.Locale;
 import javax.swing.event.DocumentEvent;
 import javax.swing.text.*;
 
@@ -61,6 +64,7 @@ public class InlineView extends LabelView {
      * @see View#insertUpdate
      */
     public void insertUpdate(DocumentEvent e, Shape a, ViewFactory f) {
+        wrapAnywhereMinimumSpan = -1;
         super.insertUpdate(e, a, f);
     }
 
@@ -77,6 +81,7 @@ public class InlineView extends LabelView {
      * @see View#removeUpdate
      */
     public void removeUpdate(DocumentEvent e, Shape a, ViewFactory f) {
+        wrapAnywhereMinimumSpan = -1;
         super.removeUpdate(e, a, f);
     }
 
@@ -90,6 +95,7 @@ public class InlineView extends LabelView {
      * @see View#changedUpdate
      */
     public void changedUpdate(DocumentEvent e, Shape a, ViewFactory f) {
+        wrapAnywhereMinimumSpan = -1;
         super.changedUpdate(e, a, f);
         StyleSheet sheet = getStyleSheet();
         attr = sheet.getViewAttributes(this);
@@ -206,6 +212,8 @@ public class InlineView extends LabelView {
             nowrap = false;
         }
 
+        wrapAnywhere = "anywhere".equals(a.getAttribute(CSS.Attribute.OVERFLOW_WRAP));
+
         HTMLDocument doc = (HTMLDocument)getDocument();
         // fetches background color from stylesheet if specified
         Color bg = doc.getBackground(a);
@@ -224,6 +232,41 @@ public class InlineView extends LabelView {
         return doc.getStyleSheet();
     }
 
+    @Override
+    public float getMinimumSpan(int axis) {
+        if (axis == View.X_AXIS && wrapAnywhere) {
+            if (wrapAnywhereMinimumSpan < 0) {
+                wrapAnywhereMinimumSpan = 0;
+                int startOffset = getStartOffset();
+                int endOffset = getEndOffset();
+                Document doc = getDocument();
+                if ((doc != null) && Boolean.TRUE.equals(doc.getProperty(HTMLDocument.MultiByteProperty))) {
+                    Container c = getContainer();
+                    Locale locale = (c == null ? Locale.getDefault() : c.getLocale());
+                    BreakIterator breaker = BreakIterator.getCharacterInstance(locale);
+                    int[] breakSpots = GlyphViewAccessor.getAccessor().calcBreakSpots(this, breaker);
+                    int lastBreak = endOffset;
+                    for (int breakSpot : breakSpots) {
+                        wrapAnywhereMinimumSpan = Math.max(wrapAnywhereMinimumSpan,
+                                getPartialSpan(breakSpot, lastBreak));
+                        lastBreak = breakSpot;
+                    }
+                    wrapAnywhereMinimumSpan = Math.max(wrapAnywhereMinimumSpan,
+                            getPartialSpan(startOffset, lastBreak));
+                } else {
+                    for (int i = startOffset ; i < endOffset; i++) {
+                        wrapAnywhereMinimumSpan = Math.max(wrapAnywhereMinimumSpan,
+                                getPartialSpan(i, i + 1));
+                    }
+                }
+            }
+            return wrapAnywhereMinimumSpan;
+        }
+        return super.getMinimumSpan(axis);
+    }
+
+    private float wrapAnywhereMinimumSpan = -1;
+    private boolean wrapAnywhere;
     private boolean nowrap;
     private AttributeSet attr;
 }

src/java.desktop/share/classes/sun/swing/text/GlyphViewAccessor.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2021 JetBrains s.r.o.
+ * 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.
+ */
+
+package sun.swing.text;
+
+import javax.swing.text.GlyphView;
+import java.text.BreakIterator;
+
+public abstract class GlyphViewAccessor {
+    private static GlyphViewAccessor accessor;
+
+    public static void setAccessor(GlyphViewAccessor a) {
+        accessor = a;
+    }
+
+    public static GlyphViewAccessor getAccessor() {
+        return accessor;
+    }
+
+    public abstract int[] calcBreakSpots(GlyphView glyphView, BreakIterator breaker);
+}