Intial checkin of layout test analyzer.

media/tools/layout_tests/trend_graph.py

Index: media/tools/layout_tests/trend_graph.py
diff --git a/media/tools/layout_tests/trend_graph.py b/media/tools/layout_tests/trend_graph.py
new file mode 100644
index 0000000000000000000000000000000000000000..1d55bb8430f4117ce060e4908bbf839f55039165
--- /dev/null
+++ b/media/tools/layout_tests/trend_graph.py
@@ -0,0 +1,83 @@
+#!/usr/bin/python
+# Copyright (c) 2011 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 fileinput
+import os
+import sys
+
+
+"""A Module for manipulating trend graph with analyzer result history."""
+
+DEFAULT_TREND_GRAPH_PATH = os.path.join('graph', 'graph.html')
+
+# The following is necesasry to decide the point to insert

[dennis_jeffrey, 2011/08/25 00:36:46]

add period at end of line

[imasaki1, 2011/08/25 23:57:03]

Done.

+LINE_INSERT_POINT_FOR_NUMBERS = r'// insert 1'
+LINE_INSERT_POINT_FOR_PASSING_RATE = r'// insert 2'
+
+
+class TrendGraph(object):
+  """A class to manage trend graph which is using Google Visualization APIs.
+
+  Google Visualization API (http://code.google.com/apis/chart/interactive/docs/
+  gallery/annotatedtimeline.html) is used to present the historical analyzer
+  result. Currently, data is directly written to JavaScript file using file
+  in-place replacement for simplicity.
+
+  TODO(imasaki): use GoogleSpreadsheet to store the analyzer result.
+  """
+
+  def __init__(self, location=DEFAULT_TREND_GRAPH_PATH):
+    """Initialize this object with the location of trend graph."""
+    self._location = location
+
+  def Update(self, datetime_string, data_map):
+    """Update trend graphs using |datetime_string| and |data_map|.
+
+    There are two kinds of graphs to be updated (one is for numbers and the
+    other is for passing rates)

[dennis_jeffrey, 2011/08/25 00:36:46]

add period at end of sentence

[imasaki1, 2011/08/25 23:57:03]

Done.

+
+    Args:
+        date_string: a timedate string (e.g., '2008,1,1,13,45,00)'

[dennis_jeffrey, 2011/08/25 00:36:46]

'date_string' --> 'datetime_string'

[dennis_jeffrey, 2011/08/25 00:36:46]

'timedate' --> 'datetime'

[imasaki1, 2011/08/25 23:57:03]

Done.

[imasaki1, 2011/08/25 23:57:03]

Done.

+        data_map: a dictionary containing 'whole', 'skip' , 'nonskip',
+          'passingrate' as its keys and (number, tile, text) string tuples
+          as values for graph annotation.
+
+        has the following tuples (numbers, title, text)

[dennis_jeffrey, 2011/08/25 00:36:46]

Remove this line; already stated on line 44 above.

[imasaki1, 2011/08/25 23:57:03]

Done.

+    """
+    joined_str = ''
+    for key in ['whole', 'skip', 'nonskip']:
+      joined_str += ','.join(data_map[key]) + ','
+    new_line_for_numbers = '         [new Date(%s),%s],\n' % (datetime_string,
+                                                             joined_str)

[dennis_jeffrey, 2011/08/25 00:36:46]

indent this line by 1 more space

[imasaki1, 2011/08/25 23:57:03]

Done.

+    new_line_for_numbers += '         %s\n' % (
+        LINE_INSERT_POINT_FOR_NUMBERS)
+    self._ReplaceLine(LINE_INSERT_POINT_FOR_NUMBERS, new_line_for_numbers)
+
+    joined_str = '%s,%s,%s' % (
+        data_map['passingrate'][0], data_map['nonskip'][1],
+        data_map['nonskip'][2])
+    new_line_for_passingrate = '         [new Date(%s),%s],\n' % (
+        datetime_string, joined_str)
+    new_line_for_passingrate += '         %s\n' % (
+        LINE_INSERT_POINT_FOR_PASSING_RATE)
+    self._ReplaceLine(LINE_INSERT_POINT_FOR_PASSING_RATE,
+                     new_line_for_passingrate)

[dennis_jeffrey, 2011/08/25 00:36:46]

indent this line by 1 more space

[imasaki1, 2011/08/25 23:57:03]

Done.

+
+  def _ReplaceLine(self, search_exp, replace_line):
+    """Replace line which has |search_exp|, with |replace_line|

[dennis_jeffrey, 2011/08/25 00:36:46]

remove the comma, and add a period at the end of the line

[imasaki1, 2011/08/25 23:57:03]

Done.

+
+    Args:
+        search_exp: search expression to find a line to be replaced.

[dennis_jeffrey, 2011/08/25 00:36:46]

'to find a line' --> 'to find in a line'

[imasaki1, 2011/08/25 23:57:03]

? I think this is correct...

[dennis_jeffrey, 2011/08/26 19:01:26]

Yes, you're right.  I was originally misinterpreting how "search_exp" was used. 
Sorry about that.

+        replace_line: the new line.
+
+    Returns:
+        a boolean to indicate if the replacement actually happens.
+    """
+    replaced = False
+    for line in fileinput.input(self._location, inplace=1):
+        if search_exp in line:

[dennis_jeffrey, 2011/08/25 00:36:46]

Indent this line and the lines below by only 2 spaces, not 4

[imasaki1, 2011/08/25 23:57:03]

Done.

+            replaced = True
+            line = replace_line
+        sys.stdout.write(line)

[dennis_jeffrey, 2011/08/25 00:36:46]

Should it really be written to stdout?  Also, we're missing a return in this
function.

[imasaki1, 2011/08/25 23:57:03]

Yes. Also removed "Returns" from comments.