Allow for words consisting of only soft hyphens; fixes bug 49837

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@1042115 13f79535-47bb-0310-9956-ffa450edef68

3 files changed, 116 insertions, 11 deletions

diff --git a/src/java/org/apache/fop/fo/FOTreeBuilder.java b/src/java/org/apache/fop/fo/FOTreeBuilder.java
index c848eb4f1..451481eb8 100644
--- a/src/java/org/apache/fop/fo/FOTreeBuilder.java
+++ b/src/java/org/apache/fop/fo/FOTreeBuilder.java
@@ -398,7 +398,9 @@ public class FOTreeBuilder extends DefaultHandler {
                 FOValidationEventProducer eventProducer
                     = FOValidationEventProducer.Provider.get(
                         userAgent.getEventBroadcaster());
-                eventProducer.unknownFormattingObject(this, currentFObj.getName(),
+                String name = (currentFObj != null ? currentFObj.getName()
+                                                   : "{" + namespaceURI + "}" + localName);
+                eventProducer.unknownFormattingObject(this, name,
                         new QName(namespaceURI, localName),
                         getEffectiveLocator());
             }
diff --git a/src/java/org/apache/fop/layoutmgr/inline/TextLayoutManager.java b/src/java/org/apache/fop/layoutmgr/inline/TextLayoutManager.java
index 05cf979de..498fd1265 100644
--- a/src/java/org/apache/fop/layoutmgr/inline/TextLayoutManager.java
+++ b/src/java/org/apache/fop/layoutmgr/inline/TextLayoutManager.java
@@ -770,11 +770,8 @@ public class TextLayoutManager extends LeafNodeLayoutManager {
         while (lastIndex > 0 && foText.charAt(lastIndex - 1) == CharUtilities.SOFT_HYPHEN) {
             lastIndex--;
         }
-        final boolean endsWithHyphen = checkEndsWithHyphen
-                && foText.charAt(lastIndex) == CharUtilities.SOFT_HYPHEN;
         Font font = FontSelector
             .selectFontForCharactersInText(foText, thisStart, lastIndex, foText, this);
-        int wordLength = lastIndex - thisStart;
         boolean kerning = font.hasKerning();
         MinOptMax wordIPD = MinOptMax.ZERO;
         for (int i = thisStart; i < lastIndex; i++) {
@@ -801,23 +798,31 @@ public class TextLayoutManager extends LeafNodeLayoutManager {
                 }
             }
         }
+        boolean endsWithHyphen = checkEndsWithHyphen
+                                 && foText.charAt(lastIndex) == CharUtilities.SOFT_HYPHEN;
         if (kerning
                 && breakOpportunity
                 && !TextLayoutManager.isSpace(ch)
                 && lastIndex > 0
                 && endsWithHyphen) {
-            final int kern = font.getKernValue(foText.charAt(lastIndex - 1), ch);
+            int kern = font.getKernValue(foText.charAt(lastIndex - 1), ch);
             if (kern != 0) {
                 addToLetterAdjust(lastIndex, kern);
                 //TODO: add kern to wordIPD?
             }
         }
-        int letterSpaces = wordLength - 1;
-        // if there is a break opportunity and the next one
-        // is not a space, it could be used as a line end;
-        // add one more letter space, in case other text follows
-        if (breakOpportunity && !TextLayoutManager.isSpace(ch)) {
-            letterSpaces++;
+        // shy+chars at start of word: wordLength == 0 && breakOpportunity
+        // shy only characters in word: wordLength == 0 && !breakOpportunity
+        int wordLength = lastIndex - thisStart;
+        int letterSpaces = 0;
+        if (wordLength != 0) {
+            letterSpaces = wordLength - 1;
+            // if there is a break opportunity and the next one
+            // is not a space, it could be used as a line end;
+            // add one more letter space, in case other text follows
+            if (breakOpportunity && !TextLayoutManager.isSpace(ch)) {
+                letterSpaces++;
+            }
         }
         assert letterSpaces >= 0;
         wordIPD = wordIPD.plus(letterSpaceIPD.mult(letterSpaces));
diff --git a/test/layoutengine/standard-testcases/word_lonely_shy.xml b/test/layoutengine/standard-testcases/word_lonely_shy.xml
new file mode 100644
index 000000000..557ceea90
--- /dev/null
+++ b/test/layoutengine/standard-testcases/word_lonely_shy.xml
@@ -0,0 +1,98 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  Licensed to the Apache Software Foundation (ASF) under one or more
+  contributor license agreements.  See the NOTICE file distributed with
+  this work for additional information regarding copyright ownership.
+  The ASF licenses this file to You under the Apache License, Version 2.0
+  (the "License"); you may not use this file except in compliance with
+  the License.  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+-->
+<!-- $Id$ -->
+<testcase>
+  <info>
+    <p>
+      This test checks that a word consisting of one or more Soft Hyphens is rendered as an empty word.
+    </p>
+  </info>
+  <fo>
+<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format">
+
+<fo:layout-master-set>
+  <fo:simple-page-master page-width="297mm" page-height="210mm" master-name="a4"><fo:region-body/></fo:simple-page-master>
+</fo:layout-master-set>
+
+  <fo:page-sequence initial-page-number="auto" master-reference="a4">
+  <fo:flow flow-name="xsl-region-body">
+	<fo:block>Name: hy (hyphen), Unicode: U+002D (45)</fo:block>
+    <fo:block>-</fo:block>
+	<fo:block>Name: shy (soft hyphen = discretionary hyphen), Unicode: U+00AD (173)</fo:block>
+    <fo:block>­ ­ ­­ ­­­ ­­­­ a ­ b ­­ c ­­­ d ­­­­</fo:block>
+  </fo:flow>
+</fo:page-sequence>
+
+</fo:root>
+  </fo>
+  <checks>
+      <eval expected="" xpath="//flow/block[4]/lineArea/text/*[1]"/>
+      <eval expected=" " xpath="//flow/block[4]/lineArea/text/*[2]"/>
+      <eval expected="" xpath="//flow/block[4]/lineArea/text/*[3]"/>
+      <eval expected=" " xpath="//flow/block[4]/lineArea/text/*[4]"/>
+      <eval expected="" xpath="//flow/block[4]/lineArea/text/*[5]"/>
+      <eval expected=" " xpath="//flow/block[4]/lineArea/text/*[6]"/>
+      <eval expected="" xpath="//flow/block[4]/lineArea/text/*[7]"/>
+      <eval expected=" " xpath="//flow/block[4]/lineArea/text/*[8]"/>
+      <eval expected="" xpath="//flow/block[4]/lineArea/text/*[9]"/>
+      <eval expected=" " xpath="//flow/block[4]/lineArea/text/*[10]"/>
+      <eval expected="a" xpath="//flow/block[4]/lineArea/text/*[11]"/>
+      <eval expected=" " xpath="//flow/block[4]/lineArea/text/*[12]"/>
+      <eval expected="" xpath="//flow/block[4]/lineArea/text/*[13]"/>
+      <eval expected=" " xpath="//flow/block[4]/lineArea/text/*[14]"/>
+      <eval expected="b" xpath="//flow/block[4]/lineArea/text/*[15]"/>
+      <eval expected=" " xpath="//flow/block[4]/lineArea/text/*[16]"/>
+      <eval expected="" xpath="//flow/block[4]/lineArea/text/*[17]"/>
+      <eval expected=" " xpath="//flow/block[4]/lineArea/text/*[18]"/>
+      <eval expected="c" xpath="//flow/block[4]/lineArea/text/*[19]"/>
+      <eval expected=" " xpath="//flow/block[4]/lineArea/text/*[20]"/>
+      <eval expected="" xpath="//flow/block[4]/lineArea/text/*[21]"/>
+      <eval expected=" " xpath="//flow/block[4]/lineArea/text/*[22]"/>
+      <eval expected="d" xpath="//flow/block[4]/lineArea/text/*[23]"/>
+      <eval expected=" " xpath="//flow/block[4]/lineArea/text/*[24]"/>
+      <eval expected="" xpath="//flow/block[4]/lineArea/text/*[25]"/>
+<!--
+      <word offset="0"/>
+      <space offset="0"> </space>
+      <word offset="0"/>
+      <space offset="0"> </space>
+      <word offset="0"/>
+      <space offset="0"> </space>
+      <word offset="0"/>
+      <space offset="0"> </space>
+      <word offset="0"/>
+      <space offset="0"> </space>
+      <word offset="0">a</word>
+      <space offset="0"> </space>
+      <word offset="0"/>
+      <space offset="0"> </space>
+      <word offset="0">b</word>
+      <space offset="0"> </space>
+      <word offset="0"/>
+      <space offset="0"> </space>
+      <word offset="0">c</word>
+      <space offset="0"> </space>
+      <word offset="0"/>
+      <space offset="0"> </space>
+      <word offset="0">d</word>
+      <space offset="0"> </space>
+      <word offset="0"/>
+-->
+  </checks>
+</testcase>
+