1// Copyright 2013 Google Inc. All Rights Reserved.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15#ifndef NINJA_LINE_PRINTER_H_
16#define NINJA_LINE_PRINTER_H_
17
18#include <stddef.h>
19#include <string>
20
21/// Prints lines of text, possibly overprinting previously printed lines
22/// if the terminal supports it.
23struct LinePrinter {
24  LinePrinter();
25
26  bool is_smart_terminal() const { return smart_terminal_; }
27  void set_smart_terminal(bool smart) { smart_terminal_ = smart; }
28
29  enum LineType { INFO, WARNING, ERROR };
30
31  /// Outputs the given line. INFO output will be overwritten.
32  /// WARNING and ERROR appear on a line to themselves.
33  void Print(std::string to_print, LineType type);
34
35  /// If there's an INFO line, keep it. If not, do nothing.
36  void KeepInfoLine();
37
38 private:
39  /// Whether we can do fancy terminal control codes.
40  bool smart_terminal_;
41
42  /// Whether the caret is at the beginning of a blank line.
43  bool have_blank_line_;
44
45#ifdef _WIN32
46  void* console_;
47#endif
48};
49
50#endif  // NINJA_LINE_PRINTER_H_
51