Ninja
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00001 // Copyright 2013 Google Inc. All Rights Reserved. 00002 // 00003 // Licensed under the Apache License, Version 2.0 (the "License"); 00004 // you may not use this file except in compliance with the License. 00005 // You may obtain a copy of the License at 00006 // 00007 // http://www.apache.org/licenses/LICENSE-2.0 00008 // 00009 // Unless required by applicable law or agreed to in writing, software 00010 // distributed under the License is distributed on an "AS IS" BASIS, 00011 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00012 // See the License for the specific language governing permissions and 00013 // limitations under the License. 00014 00015 #ifndef NINJA_LINE_PRINTER_H_ 00016 #define NINJA_LINE_PRINTER_H_ 00017 00018 #include <string> 00019 using namespace std; 00020 00021 /// Prints lines of text, possibly overprinting previously printed lines 00022 /// if the terminal supports it. 00023 struct LinePrinter { 00024 LinePrinter(); 00025 00026 bool is_smart_terminal() const { return smart_terminal_; } 00027 void set_smart_terminal(bool smart) { smart_terminal_ = smart; } 00028 00029 enum LineType { 00030 FULL, 00031 ELIDE 00032 }; 00033 /// Overprints the current line. If type is ELIDE, elides to_print to fit on 00034 /// one line. 00035 void Print(string to_print, LineType type); 00036 00037 /// Prints a string on a new line, not overprinting previous output. 00038 void PrintOnNewLine(const string& to_print); 00039 00040 private: 00041 /// Whether we can do fancy terminal control codes. 00042 bool smart_terminal_; 00043 00044 /// Whether the caret is at the beginning of a blank line. 00045 bool have_blank_line_; 00046 00047 #ifdef _WIN32 00048 void* console_; 00049 #endif 00050 }; 00051 00052 #endif // NINJA_LINE_PRINTER_H_