1 files changed, 23 insertions, 0 deletions
diff --git a/scalatexApi/src/main/scala/scalatex/stages/Trim.scala b/scalatexApi/src/main/scala/scalatex/stages/Trim.scala
new file mode 100644
index 0000000..02d9cc4
--- /dev/null
+++ b/scalatexApi/src/main/scala/scalatex/stages/Trim.scala
@@ -0,0 +1,23 @@
+package scalatex.stages
+
+/**
+ * Preprocesses the input string to normalize things related to whitespace
+ *
+ * Find the "first" non-whitespace-line of the text and remove the front
+ * of every line to align that first line with the left margin.
+ *
+ * Remove all trailing whitespace from each line.
+ */
+object Trim extends (String => String){
+  def apply(str: String) = {
+    val lines = str.split("\n")
+    val offset = lines.iterator
+                      .filter(_.length > 0)
+                      .next()
+                      .takeWhile(_ == ' ')
+                      .length
+    lines.iterator
+         .map(_.drop(offset).replaceFirst("\\s+$", ""))
+         .mkString("\n")
+  }
+}