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From jmsn...@apache.org
Subject svn commit: r452642 - in /incubator/abdera/java/trunk/core/src/main/java/org/apache/abdera/util: io/CharUtils.java iri/IRI.java
Date Tue, 03 Oct 2006 21:51:50 GMT
Author: jmsnell
Date: Tue Oct  3 14:51:49 2006
New Revision: 452642

URL: http://svn.apache.org/viewvc?view=rev&rev=452642
Log:
Additional bidi support designed to make it easier to work with bidi strings.

For instance, if you'd like to insert right-to-left plain-text characters in the title of
an entry,
you can do so using:

  entry.setTitle(CharUtils.bidiRLM("text with right-to-left characters"));


Modified:
    incubator/abdera/java/trunk/core/src/main/java/org/apache/abdera/util/io/CharUtils.java
    incubator/abdera/java/trunk/core/src/main/java/org/apache/abdera/util/iri/IRI.java

Modified: incubator/abdera/java/trunk/core/src/main/java/org/apache/abdera/util/io/CharUtils.java
URL: http://svn.apache.org/viewvc/incubator/abdera/java/trunk/core/src/main/java/org/apache/abdera/util/io/CharUtils.java?view=diff&rev=452642&r1=452641&r2=452642
==============================================================================
--- incubator/abdera/java/trunk/core/src/main/java/org/apache/abdera/util/io/CharUtils.java
(original)
+++ incubator/abdera/java/trunk/core/src/main/java/org/apache/abdera/util/io/CharUtils.java
Tue Oct  3 14:51:49 2006
@@ -237,4 +237,81 @@
       String.valueOf((char)c);
   }
   
+  
+
+  private static final char LRE = 0x202A; 
+  private static final char RLE = 0x202B; 
+  private static final char LRO = 0x202D; 
+  private static final char RLO = 0x202E; 
+  private static final char LRM = 0x200E; 
+  private static final char RLM = 0x200F;
+  private static final char PDF = 0x202C;
+  
+  /**
+   * Removes leading and trailing bidi controls from the string
+   */
+  public static String stripBidi(String s) {
+    if (s == null || s.length() <= 1) return s;
+    if (charIsBidiControl(s.charAt(0)))
+      s = s.substring(1);
+    if (charIsBidiControl(s.charAt(s.length()-1)))
+      s = s.substring(0,s.length()-1);
+    return s;
+  }
+  
+  /**
+   * Returns true if the character is a bidi control 
+   */
+  public static boolean charIsBidiControl(char c) {
+    return c == 0x202A ||
+    c == LRE ||
+    c == RLE ||
+    c == LRO ||
+    c == RLO ||
+    c == RLM ||
+    c == LRM || 
+    c == PDF;
+  }
+  
+  /**
+   * Wrap the string with Bidi Right-to-Left embed
+   */
+  public static String bidiRLE(String s) {
+    return RLE + s + PDF;
+  }
+  
+  /**
+   * Wrap the string with Bidi Right-to-Left override 
+   */
+  public static String bidiRLO(String s) {
+    return RLO + s + PDF;
+  }
+  
+  /**
+   * Wrap the string with Bidi Left-to-Right embed
+   */
+  public static String bidiLRE(String s) {
+    return LRE + s + PDF;
+  }
+  
+  /**
+   * Wrap the string with Bidi Left-to-Right override
+   */
+  public static String bidiLRO(String s) {
+    return LRO + s + PDF;
+  }
+  
+  /**
+   * Wrap the string with Bidi RML marks
+   */
+  public static String bidiRLM(String s) {
+    return RLM + s + RLM;
+  }
+  
+  /**
+   * Wrap the string with Bidi LRM marks
+   */
+  public static String bidiLRM(String s) {
+    return LRM + s + RLM;
+  }
 }

Modified: incubator/abdera/java/trunk/core/src/main/java/org/apache/abdera/util/iri/IRI.java
URL: http://svn.apache.org/viewvc/incubator/abdera/java/trunk/core/src/main/java/org/apache/abdera/util/iri/IRI.java?view=diff&rev=452642&r1=452641&r2=452642
==============================================================================
--- incubator/abdera/java/trunk/core/src/main/java/org/apache/abdera/util/iri/IRI.java (original)
+++ incubator/abdera/java/trunk/core/src/main/java/org/apache/abdera/util/iri/IRI.java Tue
Oct  3 14:51:49 2006
@@ -69,7 +69,7 @@
   
   public IRI(String iri) throws IRISyntaxException {
     Builder b = new Builder();
-    parse(iri, b);
+    parse(CharUtils.stripBidi(iri), b);
     init(
       b.schemeobj,
       b.scheme,
@@ -83,7 +83,7 @@
   }
   
   public IRI(String iri, Normalizer.Form nf) throws IRISyntaxException, IOException {
-    this(Normalizer.normalize(iri,nf).toString());
+    this(Normalizer.normalize(CharUtils.stripBidi(iri),nf).toString());
   }
   
   public IRI(
@@ -637,12 +637,7 @@
   }
   
   public String toBIDIString() {
-    StringBuffer buf = new StringBuffer(toString());
-    if (buf.length() > 0) {
-      if (buf.charAt(0) != '\u202A') buf.insert(0,'\u202A');
-      if (buf.charAt(buf.length()-1) != '\u202C') buf.append('\u202C');
-    }
-    return buf.toString();
+    return CharUtils.bidiLRE(toString());
   }
   
   public java.net.URI toURI() 



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