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 is_smart_terminalLinePrinter26 bool is_smart_terminal() const { return smart_terminal_; } set_smart_terminalLinePrinter27 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 /// The last printed info line when printing to a dumb terminal. 46 std::string info_line_; 47 48 #ifdef _WIN32 49 void* console_; 50 #endif 51 }; 52 53 #endif // NINJA_LINE_PRINTER_H_ 54