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// Copyright 2013 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef NINJA_LINE_PRINTER_H_
#define NINJA_LINE_PRINTER_H_
#include <stddef.h>
#include <string>
using namespace std;
/// Prints lines of text, possibly overprinting previously printed lines
/// if the terminal supports it.
struct LinePrinter {
LinePrinter();
bool is_smart_terminal() const { return smart_terminal_; }
void set_smart_terminal(bool smart) { smart_terminal_ = smart; }
enum LineType {
FULL,
ELIDE
};
/// Overprints the current line. If type is ELIDE, elides to_print to fit on
/// one line.
void Print(string to_print, LineType type);
/// Prints a string on a new line, not overprinting previous output.
void PrintOnNewLine(const string& to_print);
/// Lock or unlock the console. Any output sent to the LinePrinter while the
/// console is locked will not be printed until it is unlocked.
void SetConsoleLocked(bool locked);
private:
/// Whether we can do fancy terminal control codes.
bool smart_terminal_;
/// Whether the caret is at the beginning of a blank line.
bool have_blank_line_;
/// Whether console is locked.
bool console_locked_;
/// Buffered current line while console is locked.
string line_buffer_;
/// Buffered line type while console is locked.
LineType line_type_;
/// Buffered console output while console is locked.
string output_buffer_;
#ifdef _WIN32
void* console_;
#endif
/// Print the given data to the console, or buffer it if it is locked.
void PrintOrBuffer(const char *data, size_t size);
};
#endif // NINJA_LINE_PRINTER_H_
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