display line count in legpad

tools/testing/legpad/legpad.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #import("dart:html", prefix:"html");
 #import('../../../lib/compiler/compiler.dart', prefix: "compiler_lib");
 #import('../../../lib/uri/uri.dart', prefix:"uri_lib");
 
 /**
  * This is the entrypoint for a version of the leg compiler that
@@ skipping 62 matching lines @@
     setText("input", readAll(mainFile));
     Stopwatch stopwatch = new Stopwatch.start();
     runLeg();
     int elapsedMillis = stopwatch.elapsedInMs();
     if (output === null) {
       output = "throw 'dart2js compilation error';\n";
     }
 
     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));
     uri_lib.Uri libraryRoot = new uri_lib.Uri.fromString("dartdir/");
     List<String> compilerArgs = [
       "--enable_type_checks",
       "--enable_asserts"
     ];
 
     // TODO(mattsh): dart2js api should be synchronous
@@ skipping 21 matching lines @@
     }
     return element.text.trim();
   }
 
   // TODO(mattsh): should exist in standard lib somewhere
   static String htmlEscape(String text) {
     return text.replaceAll('&', '&amp;').replaceAll(
         '>', '&gt;').replaceAll('<', '&lt;');
   }
 }