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# Copyright (c) 2012 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.
import json
import os
class TimelineModel(object):
"""A proxy for about:tracing's TimelineModel class.
Test authors should never need to know that this class is a proxy.
"""
@staticmethod
def _EscapeForQuotedJavascriptExecution(js):
# Poor man's string escape.
return js.replace('\'', '\\\'');
def __init__(self, js_executor, shim_id):
self._js_executor = js_executor
self._shim_id = shim_id
# Warning: The JSON serialization process removes cyclic references.
# TODO(eatnumber): regenerate these cyclic references on deserialization.
def _CallModelMethod(self, method_name, *args):
result = self._js_executor(
"""window.timelineModelShims['%s'].invokeMethod('%s', '%s')""" % (
self._shim_id,
self._EscapeForQuotedJavascriptExecution(method_name),
self._EscapeForQuotedJavascriptExecution(json.dumps(args))
)
)
if result['success']:
return result['data']
# TODO(eatnumber): Make these exceptions more reader friendly.
raise RuntimeError(result)
def __del__(self):
self._js_executor("""
window.timelineModelShims['%s'] = undefined;
window.domAutomationController.send('');
""" % self._shim_id)
def GetAllThreads(self):
return self._CallModelMethod('getAllThreads')
def GetAllCpus(self):
return self._CallModelMethod('getAllCpus')
def GetAllProcesses(self):
return self._CallModelMethod('getAllProcesses')
def GetAllCounters(self):
return self._CallModelMethod('getAllCounters')
def FindAllThreadsNamed(self, name):
return self._CallModelMethod('findAllThreadsNamed', name);
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