1#!/usr/bin/env python
2#
3# Copyright (C) 2018 The Android Open Source Project
4#
5# Licensed under the Apache License, Version 2.0 (the "License");
6# you may not use this file except in compliance with the License.
7# You may obtain a copy of the License at
8#
9#      http://www.apache.org/licenses/LICENSE-2.0
10#
11# Unless required by applicable law or agreed to in writing, software
12# distributed under the License is distributed on an "AS IS" BASIS,
13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14# See the License for the specific language governing permissions and
15# limitations under the License.
16#
17
18
19class Logger(object):
20    """A class to log messages to a list of strings.
21
22    Attributes:
23        log_message: a list of strings, containing the log messages.
24        log_indent: integer, representing the index level
25    """
26
27    def __init__(self):
28        self.log_message = []
29        self.log_indent = 0
30
31    def Clear(self):
32        """Clears the log buffer."""
33        self.log_message = []
34        self.log_indent = 0
35
36    def Get(self):
37        """Retruns a list of all log message strings."""
38        return self.log_message
39
40    def Println(self, msg):
41        """Stores a new string `msg` to the log buffer."""
42        indent = "  " * self.log_indent
43        if msg and type(msg) is not str:
44            msg = str(msg)
45        self.log_message.append(indent + msg)
46
47    def Indent(self):
48        """Increase indent of log message."""
49        self.log_indent += 1
50
51    def Unindent(self):
52        """Decrease indent of log message."""
53        if self.log_indent > 0:
54            self.log_indent -= 1
55