public static CharSequence escapeMarkup()

in wicket-util/src/main/java/org/apache/wicket/util/string/Strings.java [291:386]
76 lines of code
20 McCabe index (conditional complexity)

	public static CharSequence escapeMarkup(final CharSequence s, final boolean escapeSpaces,
		final boolean convertToHtmlUnicodeEscapes)
	{
		if (s == null)
		{
			return null;
		}

		final int len = s.length();
		if (len == 0)
		{
			return s;
		}

		final AppendingStringBuffer buffer = new AppendingStringBuffer((int)(len * 1.1));

		for (int i = 0; i < len; i++)
		{
			final char c = s.charAt(i);

			if (Character.getType(c) == Character.UNASSIGNED)
			{
				continue;
			}
			switch (c)
			{
				case '\t' :
					if (escapeSpaces)
					{
						// Assumption is four space tabs (sorry, but that's
						// just how it is!)
						buffer.append("&nbsp;&nbsp;&nbsp;&nbsp;");
					}
					else
					{
						buffer.append(c);
					}
					break;

				case ' ' :
					if (escapeSpaces)
					{
						buffer.append("&nbsp;");
					}
					else
					{
						buffer.append(c);
					}
					break;

				case '<' :
					buffer.append("&lt;");
					break;

				case '>' :
					buffer.append("&gt;");
					break;

				case '&' :

					buffer.append("&amp;");
					break;

				case '"' :
					buffer.append("&quot;");
					break;

				case '\'' :
					buffer.append("&#039;");
					break;

				default :

					int ci = 0xffff & c;

					if (
					// if this is non-printable and not whitespace (TAB, LF, CR)
					((ci < 32) && (ci != 9) && (ci != 10) && (ci != 13)) ||
					// or non-ASCII (XXX: why 160+ ?!) and need to UNICODE escape it
						(convertToHtmlUnicodeEscapes && (ci > 159)))
					{
						buffer.append("&#");
						buffer.append(Integer.toString(ci));
						buffer.append(';');
					}
					else
					{
						// ASCII or whitespace
						buffer.append(c);
					}
					break;
			}
		}

		return buffer;
	}