display line count in legpad

tools/testing/legpad/legpad.dart

Index: tools/testing/legpad/legpad.dart
diff --git a/tools/testing/legpad/legpad.dart b/tools/testing/legpad/legpad.dart
index b79b80ebfe96b71e3ce3e291eb42dd46e32b8a7b..474dc01e467cab65858d40729e172813880801c0 100644
--- a/tools/testing/legpad/legpad.dart
+++ b/tools/testing/legpad/legpad.dart
@@ -80,10 +80,21 @@ class Legpad {
 
     setText("output", output);
     setText("warnings", warnings);
-    String timing = "generated ${output.length} characters in " +
+    int lineCount = lineCount(output);
+    String timing = "generated $lineCount lines " + 
+        "(${output.length} characters) in " +
         "${((elapsedMillis) / 1000).toStringAsPrecision(3)} seconds";
     setText("timing", timing);
   }
+  
+  static int lineCount(String s) {

[ahe, 2012/04/10 21:36:54]

I feel this should be easier, but I don't know how :-(

+    Iterable<Match> matches = "\n".allMatches(s);
+    int n = 0;
+    for (Match m in matches) {
+      n++;
+    }
+    return n;
+  } 
 
   void runLeg() {
     uri_lib.Uri mainUri = new uri_lib.Uri.fromString(getText(MAIN_ID));