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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2013, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
package scala.xml
import Utility.isSpace
object TextBuffer {
def fromString(str: String): TextBuffer = new TextBuffer() append str
}
/** The class `TextBuffer` is for creating text nodes without surplus
* whitespace. All occurrences of one or more whitespace in strings
* appended with the `append` method will be replaced by a single space
* character, and leading and trailing space will be removed completely.
*/
class TextBuffer
{
val sb = new StringBuilder()
/** Appends this string to the text buffer, trimming whitespaces as needed.
*/
def append(cs: Seq[Char]): this.type = {
cs foreach { c =>
if (!isSpace(c)) sb append c
else if (sb.isEmpty || !isSpace(sb.last)) sb append ' '
}
this
}
/** Returns an empty sequence if text is only whitespace.
*
* @return the text without whitespaces.
*/
def toText: Seq[Text] = sb.toString.trim match {
case "" => Nil
case s => Seq(Text(s))
}
}
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