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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2007, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
// $Id$
package scala.xml
object TextBuffer {
def fromString(str: String): TextBuffer = new TextBuffer().append(str)
}
/** The class <code>TextBuffer</code> is for creating text nodes without
* surplus whitespace. All occurrences of one or more whitespace in strings
* appended with the <code>append</code> method will be replaced by a single
* space character, and leading and trailing space will be removed completely.
*/
class TextBuffer {
val sb = new compat.StringBuilder()
var ws = true
def appendSpace = if(!ws) { ws = true; sb.append(' ') } else {}
def appendChar(c: char) = { ws = false; sb.append( c ) }
/** Appends this string to the text buffer, trimming whitespaces as needed.
*
* @param cs ...
* @return ...
*/
def append(cs: Seq[Char]): TextBuffer = {
for (c <- cs)
if (Utility.isSpace(c)) appendSpace else appendChar(c)
this
}
/** Returns an empty sequence if text is only whitespace.
*
* @return the text without whitespaces.
*/
def toText: Seq[Text] = {
var len = sb.length() /* invariant */
if (len == 0) return Nil
if (Utility.isSpace(sb.charAt(len - 1))) {
len -= 1
sb.setLength(len)
}
if (len == 0) return Nil
List(Text(sb.toString()))
}
}
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