Add Mac output for policy template generator

tools/grit/grit/format/policy_templates/writers/plist_strings_writer.py

Index: tools/grit/grit/format/policy_templates/writers/plist_strings_writer.py
diff --git a/tools/grit/grit/format/policy_templates/writers/plist_strings_writer.py b/tools/grit/grit/format/policy_templates/writers/plist_strings_writer.py
new file mode 100644
index 0000000000000000000000000000000000000000..ce1da45ba4355002c0e06ad35facda7596f6ce53
--- /dev/null
+++ b/tools/grit/grit/format/policy_templates/writers/plist_strings_writer.py
@@ -0,0 +1,93 @@
+# Copyright (c) 2010 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.
+
+
+from grit.format.policy_templates.writers import template_writer
+
+
+def GetWriter(info, messages):
+  '''Factory method for creating PListStringsWriter objects.
+  See the constructor of TemplateWriter for description of
+  arguments.
+  '''
+  return PListStringsWriter(info, messages)
+
+
+class PListStringsWriter(template_writer.TemplateWriter):
+  '''Outputs localized string table files for the Mac policy file.
+  These files are named Localizable.strings and they are in the
+  [lang].lproj subdirectories of the manifest bundle.
+  '''
+
+  def _GetLocalizedPolicyMessage(self, policy, msg_id):
+    '''Looks up localized caption or description for a policy.
+    If the policy does not have the required message, then it is
+    inherited from the group.
+
+    Args:
+      policy: The data structure of the policy.
+      msg_id: Either 'caption' or 'desc'.
+
+    Returns:
+      The corresponding message for the policy.
+    '''
+    if msg_id in policy:
+      msg = policy[msg_id]
+    else:
+      msg = self._policy_group[msg_id]
+    return msg
+
+  def _AddToStringTable(self, item_name, title, desc):
+    '''Add a title and a description of an item to the string table.
+
+    Args:
+      item_name: The name of the item that will get the title and the
+        description.
+      title: The text of the title to add.
+      desc: The text of the description to add.
+    '''
+    title = title.replace('"', '\\"')
+    desc = desc.replace('"', '\\"')
+    self._out.append('%s.pfm_title = \"%s\";' % (item_name, title))
+    self._out.append('%s.pfm_description = \"%s\";' % (item_name, desc))
+
+  def WritePolicy(self, policy):
+    '''Add strings to the stringtable corresponding a given policy.
+
+    Args:
+      policy: The policy for which the strings will be added to the
+        string table.
+    '''
+    desc = self._GetLocalizedPolicyMessage(policy, 'desc')
+    caption = self._GetLocalizedPolicyMessage(policy, 'caption')
+    if (policy['type'] == 'enum'):
+      # Append the captions of enum items to the description string.
+      item_descs = []
+      for item in policy['items']:
+        item_descs.append( item['value'] + ' - ' + item['caption'] )
+      desc = '\\n'.join(item_descs) + '\\n' + desc
+
+    self._AddToStringTable(policy['name'], caption, desc)
+
+  def BeginPolicyGroup(self, group):
+    self._policy_group = group
+
+  def EndPolicyGroup(self):
+    self._policy_group = None
+
+  def BeginTemplate(self):
+    self._AddToStringTable(
+        self.info['app_name'],
+        self.info['app_name'],
+        self.messages['IDS_POLICY_MAC_CHROME_PREFERENCES'])
+
+  def EndTemplate(self):
+    pass
+
+  def Prepare(self):
+    # A buffer for the lines of the string table being generated.
+    self._out = []
+
+  def GetTemplateText(self):
+    return '\n'.join(self._out)