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# Copyright 2016 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 logging
import re
import tracing_project
from py_vulcanize import generate
_JSON_TAG = '<div id="value-set-json">%s</div>'
def ReadExistingResults(output_stream):
output_stream.seek(0)
results_html = output_stream.read()
if not results_html:
return []
m = re.search(_JSON_TAG % '(.*?)', results_html, re.MULTILINE
| re.DOTALL)
if not m:
logging.warn('Failed to extract previous results from HTML output')
return []
return json.loads(m.group(1))
def RenderHTMLView(values, output_stream, reset_results=False):
if not reset_results:
values += ReadExistingResults(output_stream)
vulcanizer = tracing_project.TracingProject().CreateVulcanizer()
load_sequence = vulcanizer.CalcLoadSequenceForModuleNames(
['tracing.results2_template'])
html = generate.GenerateStandaloneHTMLAsString(load_sequence)
html = html.replace(_JSON_TAG % '',
_JSON_TAG % json.dumps(values, separators=(',', ':')))
output_stream.seek(0)
output_stream.write(html)
output_stream.truncate()
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