Implemented separate text formatter for IRC control codes.

src/net/java/sip/communicator/impl/protocol/irc/ControlChar.java

@@ -15,7 +15,7 @@ public enum ControlChar
     BOLD('\u0002', "b"),
     COLOR('\u0003', "font"),
     NORMAL('\u000F', null),
-    ITALICS('\u001D', "i"),
+    ITALICS('\u0016', "i"),
     UNDERLINE('\u001F', "u");
 
     /**

src/net/java/sip/communicator/impl/protocol/irc/FormattedTextBuilder.java

@@ -28,26 +28,57 @@ public void append(String text)
     {
         this.text.append(text);
     }
+    
+    /**
+     * Append a character.
+     * 
+     * @param c character
+     */
+    public void append(char c)
+    {
+        this.text.append(c);
+    }
 
     /**
      * Apply a control char for formatting.
      * 
      * @param c the control char
      */
-    public void apply(ControlChar c)
+    public void apply(ControlChar c, String... addition)
     {
-        if (formatting.contains(c))
+        if (c == ControlChar.NORMAL)
         {
-            // cancel active control char
-            cancel(c);
+            // Special case: NORMAL resets/cancels all active formatting
+            cancelAll();
         }
         else
         {
-            // start control char formatting
-            this.text.append(c.getHtmlStart());
+            if (formatting.contains(c))
+            {
+                // cancel active control char
+                cancel(c);
+            }
+            else
+            {
+                // start control char formatting
+                this.formatting.add(c);
+                this.text.append(c.getHtmlStart(addition));
+            }
         }
     }
     
+    /**
+     * Test whether or not a control character is already active.
+     * 
+     * @param c the control char
+     * @return returns true if control char's kind of formatting is active, or
+     *         false otherwise.
+     */
+    public boolean isActive(ControlChar c)
+    {
+        return this.formatting.contains(c);
+    }
+    
     /**
      * Cancel the specified control char.
      * 
@@ -55,7 +86,7 @@ public void apply(ControlChar c)
      */
     private void cancel(ControlChar c)
     {
-        final Stack<ControlChar> unwind = new Stack<ControlChar>();
+        final Stack<ControlChar> rewind = new Stack<ControlChar>();
         while (!this.formatting.empty())
         {
             // unwind control chars looking for the cancelled control char
@@ -67,15 +98,14 @@ private void cancel(ControlChar c)
             }
             else
             {
-                unwind.push(current);
+                rewind.push(current);
             }
         }
-        while (!unwind.empty())
+        while (!rewind.empty())
         {
-            // rewind remaining control characters
-            ControlChar current = unwind.pop();
-            this.text.append(current.getHtmlStart());
-            this.formatting.push(current);
+            // reapply remaining control characters
+            ControlChar current = rewind.pop();
+            apply(current);
         }
     }
 
@@ -102,11 +132,12 @@ public String done()
     }
 
     /**
-     * Return the formatted string. If it is not yet finished (outstanding
-     * formatting) also finish up remaining control chars.
+     * Return the formatted string in its current state. (This means that if
+     * {@link #done()} was not yet called, it will print an intermediate state of
+     * the formatted text.)
      */
     public String toString()
     {
-        return done();
+        return this.text.toString();
     }
 }

src/net/java/sip/communicator/impl/protocol/irc/Utils.java

@@ -42,9 +42,7 @@ public static String parse(String text)
         if (text == null)
             return null;
 
-        final Stack<ControlChar> formatting = new Stack<ControlChar>();
-
-        final StringBuilder builder = new StringBuilder();
+        FormattedTextBuilder builder = new FormattedTextBuilder();
         for (int i = 0; i < text.length(); i++)
         {
             char val = text.charAt(i);
@@ -57,29 +55,13 @@ public static String parse(String text)
                 case ITALICS:
                 case UNDERLINE:
                 case BOLD:
-                    if (formatting.size() > 0 && formatting.peek() == control)
-                    {
-                        formatting.pop();
-                        builder.append(control.getHtmlEnd());
-                    }
-                    else
-                    {
-                        formatting.push(control);
-                        builder.append(control.getHtmlStart());
-                    }
-                    break;
                 case NORMAL:
-                    while (formatting.size() > 0)
-                    {
-                        ControlChar c = formatting.pop();
-                        builder.append(c.getHtmlEnd());
-                    }
+                    builder.apply(control);
                     break;
                 case COLOR:
-                    if (formatting.size() > 0 && formatting.peek() == control)
+                    if (builder.isActive(control))
                     {
-                        formatting.pop();
-                        builder.append(control.getHtmlEnd());
+                        builder.apply(control);
                     }
                     else
                     {
@@ -95,18 +77,23 @@ public static String parse(String text)
                             // parse background color code
                             final Color background =
                                 parseBackgroundColor(text.substring(i + 1));
-                            adds.add("bgcolor=\"" + background.getHtml() + "\"");
+                            adds.add(
+                                "bgcolor=\"" + background.getHtml() + "\"");
                             i += 3;
                         }
                         catch (IllegalArgumentException e)
                         {
-                            LOGGER.trace("Invalid color code.", e);
+                            LOGGER.debug(
+                                "Invalid color code: "
+                                    + text.substring(i + 1), e);
+                        }
+                        catch (ArrayIndexOutOfBoundsException e)
+                        {
+                            LOGGER.debug("Unknown color code referenced: "
+                                + text.substring(i + 1), e);
                         }
-                        formatting.push(control);
-                        String htmlTag =
-                            control.getHtmlStart(adds.toArray(new String[adds
-                                .size()]));
-                        builder.append(htmlTag);
+                        builder.apply(control,
+                            adds.toArray(new String[adds.size()]));
                     }
                     break;
                 default:
@@ -122,13 +109,7 @@ public static String parse(String text)
             }
         }
 
-        // Finish any outstanding formatting.
-        while (formatting.size() > 0)
-        {
-            builder.append(formatting.pop().getHtmlEnd());
-        }
-
-        return builder.toString();
+        return builder.done();
     }
 
     /**

test/net/java/sip/communicator/impl/protocol/irc/FormattedTextBuilderTest.java

@@ -24,6 +24,17 @@ public void testPlainText()
         Assert.assertEquals("Hello world!", formatted.done());
     }
     
+    public void testPlainChar()
+    {
+        FormattedTextBuilder formatted = new FormattedTextBuilder();
+        formatted.append('H');
+        formatted.append('e');
+        formatted.append('l');
+        formatted.append('l');
+        formatted.append('o');
+        Assert.assertEquals("Hello", formatted.done());
+    }
+    
     public void testDoneWithoutFormatting()
     {
         FormattedTextBuilder formatted = new FormattedTextBuilder();
@@ -43,7 +54,53 @@ public void testDoneRepeatedly()
     public void testOnlyFormatting()
     {
         FormattedTextBuilder formatted = new FormattedTextBuilder();
-        formatted.append("Hello world!");
-        Assert.assertEquals("Hello world!", formatted.done());
+        formatted.apply(ControlChar.BOLD);
+        Assert.assertEquals("<b></b>", formatted.done());
+    }
+    
+    public void testMixedFormattingContent()
+    {
+        FormattedTextBuilder formatted = new FormattedTextBuilder();
+        formatted.apply(ControlChar.BOLD);
+        formatted.append("Hello ");
+        formatted.apply(ControlChar.ITALICS);
+        formatted.append("world");
+        formatted.apply(ControlChar.BOLD);
+        formatted.append("!!!");
+        Assert.assertEquals("<b>Hello <i>world</i></b><i>!!!</i>",
+            formatted.done());
+    }
+    
+    public void testToStringIntermediateResult()
+    {
+        FormattedTextBuilder formatted = new FormattedTextBuilder();
+        formatted.apply(ControlChar.BOLD);
+        formatted.append("Hello ");
+        formatted.apply(ControlChar.ITALICS);
+        Assert.assertEquals("<b>Hello <i>", formatted.toString());
+        formatted.append("world");
+        formatted.apply(ControlChar.BOLD);
+        formatted.append("!!!");
+        Assert.assertEquals("<b>Hello <i>world</i></b><i>!!!",
+            formatted.toString());
+        Assert.assertEquals("<b>Hello <i>world</i></b><i>!!!</i>",
+            formatted.done());
+        Assert.assertEquals("<b>Hello <i>world</i></b><i>!!!</i>",
+            formatted.toString());
+    }
+    
+    public void testActiveFormatting()
+    {
+        FormattedTextBuilder formatted = new FormattedTextBuilder();
+        Assert.assertFalse(formatted.isActive(ControlChar.BOLD));
+        formatted.apply(ControlChar.BOLD);
+        Assert.assertTrue(formatted.isActive(ControlChar.BOLD));
+        formatted.append("Hello ");
+        Assert.assertFalse(formatted.isActive(ControlChar.ITALICS));
+        formatted.apply(ControlChar.ITALICS);
+        Assert.assertTrue(formatted.isActive(ControlChar.ITALICS));
+        formatted.done();
+        Assert.assertFalse(formatted.isActive(ControlChar.BOLD));
+        Assert.assertFalse(formatted.isActive(ControlChar.ITALICS));
     }
 }

test/net/java/sip/communicator/impl/protocol/irc/UtilsTest.java

@@ -51,7 +51,7 @@ public void testParseStringWithBoldCode()
     public void testParseStringWithItalicsCode()
     {
         final String ircMessage =
-            "My \u001Ditalics\u001D message \u001DITALICS!\u001D.";
+            "My \u0016italics\u0016 message \u0016ITALICS!\u0016.";
         final String htmlMessage = "My <i>italics</i> message <i>ITALICS!</i>.";
         Assert.assertEquals(htmlMessage, Utils.parse(ircMessage));
     }
@@ -125,7 +125,7 @@ public void testParseStringWithIncompleteBackgroundColorControlCode()
     public void testParseSringAndNeutralizeWithNormalControlCode()
     {
         final String ircMessage =
-            "My \u0002\u001D\u001F\u000304,12RED on Light Blue\u000F message.";
+            "My \u0002\u0016\u001F\u000304,12RED on Light Blue\u000F message.";
         final String htmlMessage =
             "My <b><i><u><font color=\"Red\" bgcolor=\"RoyalBlue\">RED on Light Blue</font></u></i></b> message.";
         Assert.assertEquals(htmlMessage, Utils.parse(ircMessage));
@@ -134,7 +134,7 @@ public void testParseSringAndNeutralizeWithNormalControlCode()
     public void testParseStringWithUnclosedFormattingI()
     {
         final String ircMessage =
-            "My \u0002\u001D\u001F\u000304,12RED on Light Blue message.";
+            "My \u0002\u0016\u001F\u000304,12RED on Light Blue message.";
         final String htmlMessage =
             "My <b><i><u><font color=\"Red\" bgcolor=\"RoyalBlue\">RED on Light Blue message.</font></u></i></b>";
         Assert.assertEquals(htmlMessage, Utils.parse(ircMessage));
@@ -156,14 +156,14 @@ public void testParseUnknownBackgroundCOlor()
     
     public void testStackIncompatibleFormatToggling()
     {
-        final String ircMessage = "\u0002\u001D\u001FHello\u0002 W\u001Dorld\u001F!";
+        final String ircMessage = "\u0002\u0016\u001FHello\u0002 W\u0016orld\u001F!";
         final String htmlMessage = "<b><i><u>Hello</u></i></b><i><u> W</u></i><u>orld</u>!";
         Assert.assertEquals(htmlMessage, Utils.parse(ircMessage));
     }
     
     public void testColorSwitch()
     {
-        final String ircMessage = "\u000302,03Hello \u000308,09World\u000F!";
+        final String ircMessage = "\u000302,03Hello \u0003\u000308,09World\u000F!";
         final String htmlMessage = "<font color=\"Navy\" bgcolor=\"Green\">Hello </font><font color=\"Yellow\" bgcolor=\"Lime\">World</font>!";
         Assert.assertEquals(htmlMessage, Utils.parse(ircMessage));
     }