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. |
23 | struct 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 | bool supports_color() const { return supports_color_; } |
30 | |
31 | enum LineType { |
32 | FULL, |
33 | ELIDE |
34 | }; |
35 | /// Overprints the current line. If type is ELIDE, elides to_print to fit on |
36 | /// one line. |
37 | void Print(std::string to_print, LineType type); |
38 | |
39 | /// Prints a string on a new line, not overprinting previous output. |
40 | void PrintOnNewLine(const std::string& to_print); |
41 | |
42 | /// Lock or unlock the console. Any output sent to the LinePrinter while the |
43 | /// console is locked will not be printed until it is unlocked. |
44 | void SetConsoleLocked(bool locked); |
45 | |
46 | private: |
47 | /// Whether we can do fancy terminal control codes. |
48 | bool smart_terminal_; |
49 | |
50 | /// Whether we can use ISO 6429 (ANSI) color sequences. |
51 | bool supports_color_; |
52 | |
53 | /// Whether the caret is at the beginning of a blank line. |
54 | bool have_blank_line_; |
55 | |
56 | /// Whether console is locked. |
57 | bool console_locked_; |
58 | |
59 | /// Buffered current line while console is locked. |
60 | std::string line_buffer_; |
61 | |
62 | /// Buffered line type while console is locked. |
63 | LineType line_type_; |
64 | |
65 | /// Buffered console output while console is locked. |
66 | std::string output_buffer_; |
67 | |
68 | #ifdef _WIN32 |
69 | void* console_; |
70 | #endif |
71 | |
72 | /// Print the given data to the console, or buffer it if it is locked. |
73 | void PrintOrBuffer(const char *data, size_t size); |
74 | }; |
75 | |
76 | #endif // NINJA_LINE_PRINTER_H_ |
77 | |