ClickHouse/base/poco/Foundation/include/Poco/ConsoleChannel.h

//
// ConsoleChannel.h
//
// Library: Foundation
// Package: Logging
// Module:  ConsoleChannel
//
// Definition of the ConsoleChannel class.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier:	BSL-1.0
//


#ifndef Foundation_ConsoleChannel_INCLUDED
#define Foundation_ConsoleChannel_INCLUDED


#include <ostream>
#include "Poco/Channel.h"
#include "Poco/Foundation.h"
#include "Poco/Mutex.h"


namespace Poco
{


class Foundation_API ConsoleChannel : public Channel
/// A channel that writes to an ostream.
///
/// Only the message's text is written, followed
/// by a newline.
///
/// Chain this channel to a FormattingChannel with an
/// appropriate Formatter to control what is contained
/// in the text.
///
/// Similar to StreamChannel, except that a static
/// mutex is used to protect against multiple
/// console channels concurrently writing to the
/// same stream.
{
public:
    ConsoleChannel();
    /// Creates the channel and attaches std::clog.

    ConsoleChannel(std::ostream & str);
    /// Creates the channel using the given stream.

    void log(const Message & msg);
    /// Logs the given message to the channel's stream.

protected:
    ~ConsoleChannel();

private:
    std::ostream & _str;
    static FastMutex _mutex;
};


class Foundation_API ColorConsoleChannel : public Channel
/// A channel that writes to an ostream.
///
/// Only the message's text is written, followed
/// by a newline.
///
/// Messages can be colored depending on priority.
/// The console device must support ANSI escape codes
/// in order to display colored messages.
///
/// To enable message coloring, set the "enableColors"
/// property to true (default). Furthermore, colors can be
/// configured by setting the following properties
/// (default values are given in parenthesis):
///
///   * traceColor (gray)
///   * debugColor (gray)
///   * informationColor (default)
///   * noticeColor (default)
///   * warningColor (yellow)
///   * errorColor (lightRed)
///   * criticalColor (lightRed)
///   * fatalColor (lightRed)
///
/// The following color values are supported:
///
///   * default
///   * black
///   * red
///   * green
///   * brown
///   * blue
///   * magenta
///   * cyan
///   * gray
///   * darkgray
///   * lightRed
///   * lightGreen
///   * yellow
///   * lightBlue
///   * lightMagenta
///   * lightCyan
///   * white
///
/// Chain this channel to a FormattingChannel with an
/// appropriate Formatter to control what is contained
/// in the text.
///
/// Similar to StreamChannel, except that a static
/// mutex is used to protect against multiple
/// console channels concurrently writing to the
/// same stream.
{
public:
    ColorConsoleChannel();
    /// Creates the channel and attaches std::clog.

    ColorConsoleChannel(std::ostream & str);
    /// Creates the channel using the given stream.

    void log(const Message & msg);
    /// Logs the given message to the channel's stream.

    void setProperty(const std::string & name, const std::string & value);
    /// Sets the property with the given name.
    ///
    /// The following properties are supported:
    ///   * enableColors:      Enable or disable colors.
    ///   * traceColor:        Specify color for trace messages.
    ///   * debugColor:        Specify color for debug messages.
    ///   * informationColor:  Specify color for information messages.
    ///   * noticeColor:       Specify color for notice messages.
    ///   * warningColor:      Specify color for warning messages.
    ///   * errorColor:        Specify color for error messages.
    ///   * criticalColor:     Specify color for critical messages.
    ///   * fatalColor:        Specify color for fatal messages.
    ///
    /// See the class documentation for a list of supported color values.

    std::string getProperty(const std::string & name) const;
    /// Returns the value of the property with the given name.
    /// See setProperty() for a description of the supported
    /// properties.

protected:
    enum Color
    {
        CC_DEFAULT = 0x0027,
        CC_BLACK = 0x001e,
        CC_RED = 0x001f,
        CC_GREEN = 0x0020,
        CC_BROWN = 0x0021,
        CC_BLUE = 0x0022,
        CC_MAGENTA = 0x0023,
        CC_CYAN = 0x0024,
        CC_GRAY = 0x0025,
        CC_DARKGRAY = 0x011e,
        CC_LIGHTRED = 0x011f,
        CC_LIGHTGREEN = 0x0120,
        CC_YELLOW = 0x0121,
        CC_LIGHTBLUE = 0x0122,
        CC_LIGHTMAGENTA = 0x0123,
        CC_LIGHTCYAN = 0x0124,
        CC_WHITE = 0x0125
    };

    ~ColorConsoleChannel();
    Color parseColor(const std::string & color) const;
    std::string formatColor(Color color) const;
    void initColors();

private:
    std::ostream & _str;
    bool _enableColors;
    Color _colors[9];
    static FastMutex _mutex;
    static const std::string CSI;
};


} // namespace Poco


#endif // Foundation_ConsoleChannel_INCLUDED