From 217aaf7497990cf5cd23bca2bb57b5b6ea708873 Mon Sep 17 00:00:00 2001
From: Martin Odersky <odersky@gmail.com>
Date: Tue, 31 Jul 2012 15:47:05 +0200
Subject: Made worksheet output wrap around after custimizable # of output
 columns.

---
 .../scala/tools/nsc/interactive/ScratchPadMaker.scala  |  2 +-
 src/library/scala/runtime/WorksheetSupport.scala       | 18 +++++++++++-------
 2 files changed, 12 insertions(+), 8 deletions(-)

(limited to 'src')

diff --git a/src/compiler/scala/tools/nsc/interactive/ScratchPadMaker.scala b/src/compiler/scala/tools/nsc/interactive/ScratchPadMaker.scala
index bd1869e1a4..f7b1c42fd6 100644
--- a/src/compiler/scala/tools/nsc/interactive/ScratchPadMaker.scala
+++ b/src/compiler/scala/tools/nsc/interactive/ScratchPadMaker.scala
@@ -46,7 +46,7 @@ trait ScratchPadMaker { self: Global =>
         patches += Patch(stat.pos.start, ";$stop()")
       var end = stat.pos.end
       if (end > skipped) {
-        while (end < contents.length && !(isLineBreakChar(contents(end)))) end += 1
+        while (end < contents.length && !isLineBreakChar(contents(end))) end += 1
         patches += Patch(stat.pos.start, ";$skip("+(end-skipped)+"); ")
         skipped = end
       }
diff --git a/src/library/scala/runtime/WorksheetSupport.scala b/src/library/scala/runtime/WorksheetSupport.scala
index db6d6359a3..f9ffb9197b 100644
--- a/src/library/scala/runtime/WorksheetSupport.scala
+++ b/src/library/scala/runtime/WorksheetSupport.scala
@@ -14,9 +14,11 @@ object WorksheetSupport {
    *  By default it is 30ms.
    */
   private class FlushedOutputStream(out: OutputStream) extends OutputStream {
+    protected def flushInterval = 30000000L // interval between flushes, by default 30ms
+    protected def width = 80                // output width, by default 80 characters
+    protected def tabInc = 8                // tab increment, by default 8 characters
     private var lastFlush: Long = 0L
-    protected val flushInterval = 30000000L // 30ms
-    private var lastCh: Int = '\n'
+    private var col = 0
     override def write(b: Array[Byte], off: Int, len: Int) = {
       for (idx <- off until (off + len min b.length)) writeOne(b(idx))
       flush()
@@ -33,14 +35,16 @@ object WorksheetSupport {
       }
     }
     def writeOne(c: Int) {
-      if (lastCh == '\n') {
-        lastCh = 0
+      if (col == 0)
         write((currentOffset+" ").getBytes)
-      }
       out.write(c)
-      lastCh = c
+      col = 
+        if (c == '\n') 0
+        else if (c == '\t') (col / tabInc) * tabInc + tabInc 
+        else col + 1
+      if (col >= width) writeOne('\n')
     }
-    def ensureNewLine() = if (lastCh != '\n') writeOne('\n')
+    def ensureNewLine() = if (col != 0) writeOne('\n')
   }
 
   private val flushedOut = new FlushedOutputStream(System.out)
-- 
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