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/*
This file is part of Konsole, KDE's terminal.
Copyright (C) 2007 by Robert Knight <robertknight@gmail.com>
Copyright (C) 1997,1998 by Lars Doelle <lars.doelle@on-line.de>
Rewritten for QT4 by e_k <e_k at users.sourceforge.net>, Copyright (C)2008
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.
*/
#ifndef CHARACTERCOLOR_H
#define CHARACTERCOLOR_H
// Qt
#include <QtGui/QColor>
namespace Konsole
{
/**
* An entry in a terminal display's color palette.
*
* A color palette is an array of 16 ColorEntry instances which map
* system color indexes (from 0 to 15) into actual colors.
*
* Each entry can be set as bold, in which case any text
* drawn using the color should be drawn in bold.
*
* Each entry can also be transparent, in which case the terminal
* display should avoid drawing the background for any characters
* using the entry as a background.
*/
class ColorEntry
{
public:
/**
* Constructs a new color palette entry.
*
* @param c The color value for this entry.
* @param tr Specifies that the color should be transparent when used as a background color.
* @param b Specifies that text drawn with this color should be bold.
*/
ColorEntry(QColor c, bool tr, bool b) : color(c), transparent(tr), bold(b) {}
/**
* Constructs a new color palette entry with an undefined color, and
* with the transparent and bold flags set to false.
*/
ColorEntry() : transparent(false), bold(false) {}
/**
* Sets the color, transparency and boldness of this color to those of @p rhs.
*/
void operator=(const ColorEntry& rhs)
{
color = rhs.color;
transparent = rhs.transparent;
bold = rhs.bold;
}
/** The color value of this entry for display. */
QColor color;
/**
* If true character backgrounds using this color should be transparent.
* This is not applicable when the color is used to render text.
*/
bool transparent;
/**
* If true characters drawn using this color should be bold.
* This is not applicable when the color is used to draw a character's background.
*/
bool bold;
};
// Attributed Character Representations ///////////////////////////////
// Colors
#define BASE_COLORS (2+8)
#define INTENSITIES 2
#define TABLE_COLORS (INTENSITIES*BASE_COLORS)
#define DEFAULT_FORE_COLOR 0
#define DEFAULT_BACK_COLOR 1
//a standard set of colors using black text on a white background.
//defined in TerminalDisplay.cpp
static const ColorEntry base_color_table[TABLE_COLORS] =
// The following are almost IBM standard color codes, with some slight
// gamma correction for the dim colors to compensate for bright X screens.
// It contains the 8 ansiterm/xterm colors in 2 intensities.
{
// Fixme: could add faint colors here, also.
// normal
ColorEntry(QColor(0x00,0x00,0x00), 0, 0 ), ColorEntry( QColor(0xB2,0xB2,0xB2), 1, 0 ), // Dfore, Dback
ColorEntry(QColor(0x00,0x00,0x00), 0, 0 ), ColorEntry( QColor(0xB2,0x18,0x18), 0, 0 ), // Black, Red
ColorEntry(QColor(0x18,0xB2,0x18), 0, 0 ), ColorEntry( QColor(0xB2,0x68,0x18), 0, 0 ), // Green, Yellow
ColorEntry(QColor(0x18,0x18,0xB2), 0, 0 ), ColorEntry( QColor(0xB2,0x18,0xB2), 0, 0 ), // Blue, Magenta
ColorEntry(QColor(0x18,0xB2,0xB2), 0, 0 ), ColorEntry( QColor(0xB2,0xB2,0xB2), 0, 0 ), // Cyan, White
// intensiv
ColorEntry(QColor(0x00,0x00,0x00), 0, 1 ), ColorEntry( QColor(0xFF,0xFF,0xFF), 1, 0 ),
ColorEntry(QColor(0x68,0x68,0x68), 0, 0 ), ColorEntry( QColor(0xFF,0x54,0x54), 0, 0 ),
ColorEntry(QColor(0x54,0xFF,0x54), 0, 0 ), ColorEntry( QColor(0xFF,0xFF,0x54), 0, 0 ),
ColorEntry(QColor(0x54,0x54,0xFF), 0, 0 ), ColorEntry( QColor(0xFF,0x54,0xFF), 0, 0 ),
ColorEntry(QColor(0x54,0xFF,0xFF), 0, 0 ), ColorEntry( QColor(0xFF,0xFF,0xFF), 0, 0 )
};
/* CharacterColor is a union of the various color spaces.
Assignment is as follows:
Type - Space - Values
0 - Undefined - u: 0, v:0 w:0
1 - Default - u: 0..1 v:intense w:0
2 - System - u: 0..7 v:intense w:0
3 - Index(256) - u: 16..255 v:0 w:0
4 - RGB - u: 0..255 v:0..256 w:0..256
Default colour space has two separate colours, namely
default foreground and default background colour.
*/
#define COLOR_SPACE_UNDEFINED 0
#define COLOR_SPACE_DEFAULT 1
#define COLOR_SPACE_SYSTEM 2
#define COLOR_SPACE_256 3
#define COLOR_SPACE_RGB 4
/**
* Describes the color of a single character in the terminal.
*/
class CharacterColor
{
friend class Character;
public:
/** Constructs a new CharacterColor whoose color and color space are undefined. */
CharacterColor()
: _colorSpace(COLOR_SPACE_UNDEFINED),
_u(0),
_v(0),
_w(0)
{}
/**
* Constructs a new CharacterColor using the specified @p colorSpace and with
* color value @p co
*
* The meaning of @p co depends on the @p colorSpace used.
*
* TODO : Document how @p co relates to @p colorSpace
*
* TODO : Add documentation about available color spaces.
*/
CharacterColor(quint8 colorSpace, int co)
: _colorSpace(colorSpace),
_u(0),
_v(0),
_w(0)
{
switch (colorSpace)
{
case COLOR_SPACE_DEFAULT:
_u = co & 1;
break;
case COLOR_SPACE_SYSTEM:
_u = co & 7;
_v = (co >> 3) & 1;
break;
case COLOR_SPACE_256:
_u = co & 255;
break;
case COLOR_SPACE_RGB:
_u = co >> 16;
_v = co >> 8;
_w = co;
break;
default:
_colorSpace = COLOR_SPACE_UNDEFINED;
}
}
/**
* Returns true if this character color entry is valid.
*/
bool isValid()
{
return _colorSpace != COLOR_SPACE_UNDEFINED;
}
/**
* Toggles the value of this color between a normal system color and the corresponding intensive
* system color.
*
* This is only applicable if the color is using the COLOR_SPACE_DEFAULT or COLOR_SPACE_SYSTEM
* color spaces.
*/
void toggleIntensive();
/**
* Returns the color within the specified color @palette
*
* The @p palette is only used if this color is one of the 16 system colors, otherwise
* it is ignored.
*/
QColor color(const ColorEntry* palette) const;
/**
* Compares two colors and returns true if they represent the same color value and
* use the same color space.
*/
friend bool operator == (const CharacterColor& a, const CharacterColor& b);
/**
* Compares two colors and returns true if they represent different color values
* or use different color spaces.
*/
friend bool operator != (const CharacterColor& a, const CharacterColor& b);
private:
quint8 _colorSpace;
// bytes storing the character color
quint8 _u;
quint8 _v;
quint8 _w;
};
inline bool operator == (const CharacterColor& a, const CharacterColor& b)
{
return *reinterpret_cast<const quint32*>(&a._colorSpace) ==
*reinterpret_cast<const quint32*>(&b._colorSpace);
}
inline bool operator != (const CharacterColor& a, const CharacterColor& b)
{
return *reinterpret_cast<const quint32*>(&a._colorSpace) !=
*reinterpret_cast<const quint32*>(&b._colorSpace);
}
inline const QColor color256(quint8 u, const ColorEntry* base)
{
// 0.. 16: system colors
if (u < 8) return base[u+2 ].color; u -= 8;
if (u < 8) return base[u+2+BASE_COLORS].color; u -= 8;
// 16..231: 6x6x6 rgb color cube
if (u < 216) return QColor(255*((u/36)%6)/5,
255*((u/ 6)%6)/5,
255*((u/ 1)%6)/5); u -= 216;
// 232..255: gray, leaving out black and white
int gray = u*10+8; return QColor(gray,gray,gray);
}
inline QColor CharacterColor::color(const ColorEntry* base) const
{
switch (_colorSpace)
{
case COLOR_SPACE_DEFAULT: return base[_u+0+(_v?BASE_COLORS:0)].color;
case COLOR_SPACE_SYSTEM: return base[_u+2+(_v?BASE_COLORS:0)].color;
case COLOR_SPACE_256: return color256(_u,base);
case COLOR_SPACE_RGB: return QColor(_u,_v,_w);
case COLOR_SPACE_UNDEFINED: return QColor();
}
Q_ASSERT(false); // invalid color space
return QColor();
}
inline void CharacterColor::toggleIntensive()
{
if (_colorSpace == COLOR_SPACE_SYSTEM || _colorSpace == COLOR_SPACE_DEFAULT)
{
_v = !_v;
}
}
}
#endif // CHARACTERCOLOR_H
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