InspectorTimeline improvements

tools/telemetry/telemetry/timeline_event.py

Index: tools/telemetry/telemetry/timeline_event.py
diff --git a/tools/telemetry/telemetry/timeline_event.py b/tools/telemetry/telemetry/timeline_event.py
new file mode 100644
index 0000000000000000000000000000000000000000..bbcafb2e4a3e0c78cb4689cc0c3fba69e4905dfd
--- /dev/null
+++ b/tools/telemetry/telemetry/timeline_event.py
@@ -0,0 +1,48 @@
+# Copyright (c) 2013 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+class TimelineEvent(object):
+  """Represents a timeline event."""
+  def __init__(self, name, start_time_ms, duration_ms, args=None):
+    self.name = name
+    self.start_time_ms = start_time_ms
+    self.duration_ms = duration_ms
+    self.children = []
+    self.args = args
+
+  @property
+  def end_time_ms(self):
+    return self.start_time_ms + self.duration_ms
+
+  @property
+  def self_time_ms(self):
+    """Time spent in this function less any time spent in child events."""
+    child_total = sum(
+      [e.duration_ms for e in self.children])
+    return self.duration_ms - child_total
+
+  def __repr__(self):
+    if self.args:
+      args_str = ', ' + repr(self.args)
+    else:
+      args_str = ''
+
+    return "TimelineEvent(name='%s', start_ms=%f, duration_ms=%s%s)" % (
+      self.name,
+      self.start_time_ms,
+      self.duration_ms,
+      args_str)
+
+  @staticmethod
+  def _GetAllChildrenRecursive(events, item):
+    events.append(item)
+    for child in item.children:
+      TimelineEvent._GetAllChildrenRecursive(events, child)
+
+  def GetAllChildrenRecursive(self, include_self=False):
+    events = []
+    TimelineEvent._GetAllChildrenRecursive(events, self)
+    if not include_self:
+      del events[0]
+    return events