Post-meetup feature extravaganza.

runtime/bin/vmservice/client/lib/src/observatory_elements/observatory_element.dart

Index: runtime/bin/vmservice/client/lib/src/observatory_elements/observatory_element.dart
===================================================================
--- runtime/bin/vmservice/client/lib/src/observatory_elements/observatory_element.dart	(revision 32027)
+++ runtime/bin/vmservice/client/lib/src/observatory_elements/observatory_element.dart	(working copy)
@@ -4,6 +4,7 @@
 
 library observatory_element;
 
+import 'dart:math';
 import 'package:polymer/polymer.dart';
 import 'package:observatory/observatory.dart';
 export 'package:observatory/observatory.dart';
@@ -30,4 +31,67 @@
   void appChanged(oldValue) {
   }
   bool get applyAuthorStyles => true;
-}
+
+  static String _zeroPad(int value, int pad) {
+    String prefix = "";
+    while (pad > 1) {
+      int pow10 = pow(10, pad - 1);
+      if (value < pow10) {
+        prefix = prefix + "0";
+      }
+      pad--;
+    }
+    return "${prefix}${value}";
+  }
+
+  String formatTime(double time) {
+    if (time == null) {
+      return "-";
+    }
+    const millisPerHour = 60 * 60 * 1000;
+    const millisPerMinute = 60 * 1000;
+    const millisPerSecond = 1000;
+
+    var millis = (time * millisPerSecond).round();
+
+    var hours = millis ~/ millisPerHour;
+    millis = millis % millisPerHour;
+
+    var minutes = millis ~/ millisPerMinute;
+    millis = millis % millisPerMinute;
+
+    var seconds = millis ~/ millisPerSecond;
+    millis = millis % millisPerSecond;
+
+    return ("${_zeroPad(hours,2)}"
+            ":${_zeroPad(minutes,2)}"
+            ":${_zeroPad(seconds,2)}"
+            ".${_zeroPad(millis,3)}");
+
+  }
+
+  String formatSize(int bytes) {
+    const int bytesPerKB = 1024;
+    const int bytesPerMB = 1024 * bytesPerKB;
+    const int bytesPerGB = 1024 * bytesPerMB;
+    const int bytesPerTB = 1024 * bytesPerGB;
+
+    if (bytes < bytesPerKB) {
+      return "${bytes}B";
+    } else if (bytes < bytesPerMB) {
+      return "${(bytes / bytesPerKB).round()}KB";
+    } else if (bytes < bytesPerGB) {
+      return "${(bytes / bytesPerMB).round()}MB";
+    } else if (bytes < bytesPerTB) {
+      return "${(bytes / bytesPerGB).round()}GB";
+    } else {
+      return "${(bytes / bytesPerTB).round()}TB";
+    }
+  }
+
+  String fileAndLine(Map frame) {
+    var file = frame['script']['user_name'];
+    var shortFile = file.substring(file.lastIndexOf('/') + 1);
+    return "${shortFile}:${frame['line']}";    
+  }
+}