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300 lines
8.1 KiB
300 lines
8.1 KiB
/*
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This file is part of Konsole, KDE's terminal.
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Copyright 2007-2008 by Robert Knight <robertknight@gmail.com>
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Copyright 1997,1998 by Lars Doelle <lars.doelle@on-line.de>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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*/
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#ifndef CHARACTERCOLOR_H
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#define CHARACTERCOLOR_H
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// Qt
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#include <QColor>
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//#include <kdemacros.h>
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#define KDE_NO_EXPORT
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namespace Konsole
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{
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/**
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* An entry in a terminal display's color palette.
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*
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* A color palette is an array of 16 ColorEntry instances which map
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* system color indexes (from 0 to 15) into actual colors.
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*
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* Each entry can be set as bold, in which case any text
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* drawn using the color should be drawn in bold.
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*
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* Each entry can also be transparent, in which case the terminal
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* display should avoid drawing the background for any characters
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* using the entry as a background.
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*/
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class ColorEntry
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{
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public:
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/** Specifies the weight to use when drawing text with this color. */
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enum FontWeight
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{
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/** Always draw text in this color with a bold weight. */
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Bold,
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/** Always draw text in this color with a normal weight. */
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Normal,
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/**
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* Use the current font weight set by the terminal application.
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* This is the default behavior.
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*/
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UseCurrentFormat
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};
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/**
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* Constructs a new color palette entry.
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*
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* @param c The color value for this entry.
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* @param tr Specifies that the color should be transparent when used as a background color.
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* @param weight Specifies the font weight to use when drawing text with this color.
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*/
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ColorEntry(QColor c, bool tr, FontWeight weight = UseCurrentFormat)
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: color(c), transparent(tr), fontWeight(weight) {}
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/**
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* Constructs a new color palette entry with an undefined color, and
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* with the transparent and bold flags set to false.
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*/
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ColorEntry() : transparent(false), fontWeight(UseCurrentFormat) {}
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/**
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* Sets the color, transparency and boldness of this color to those of @p rhs.
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*/
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void operator=(const ColorEntry& rhs)
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{
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color = rhs.color;
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transparent = rhs.transparent;
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fontWeight = rhs.fontWeight;
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}
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/** The color value of this entry for display. */
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QColor color;
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/**
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* If true character backgrounds using this color should be transparent.
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* This is not applicable when the color is used to render text.
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*/
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bool transparent;
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/**
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* Specifies the font weight to use when drawing text with this color.
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* This is not applicable when the color is used to draw a character's background.
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*/
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FontWeight fontWeight;
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};
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// Attributed Character Representations ///////////////////////////////
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// Colors
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#define BASE_COLORS (2+8)
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#define INTENSITIES 2
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#define TABLE_COLORS (INTENSITIES*BASE_COLORS)
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#define DEFAULT_FORE_COLOR 0
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#define DEFAULT_BACK_COLOR 1
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//a standard set of colors using black text on a white background.
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//defined in TerminalDisplay.cpp
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extern const ColorEntry base_color_table[TABLE_COLORS] KDE_NO_EXPORT;
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/* CharacterColor is a union of the various color spaces.
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Assignment is as follows:
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Type - Space - Values
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0 - Undefined - u: 0, v:0 w:0
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1 - Default - u: 0..1 v:intense w:0
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2 - System - u: 0..7 v:intense w:0
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3 - Index(256) - u: 16..255 v:0 w:0
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4 - RGB - u: 0..255 v:0..256 w:0..256
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Default colour space has two separate colours, namely
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default foreground and default background colour.
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*/
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#define COLOR_SPACE_UNDEFINED 0
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#define COLOR_SPACE_DEFAULT 1
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#define COLOR_SPACE_SYSTEM 2
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#define COLOR_SPACE_256 3
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#define COLOR_SPACE_RGB 4
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/**
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* Describes the color of a single character in the terminal.
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*/
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class CharacterColor
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{
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friend class Character;
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public:
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/** Constructs a new CharacterColor whoose color and color space are undefined. */
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CharacterColor()
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: _colorSpace(COLOR_SPACE_UNDEFINED),
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_u(0),
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_v(0),
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_w(0)
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{}
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/**
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* Constructs a new CharacterColor using the specified @p colorSpace and with
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* color value @p co
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*
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* The meaning of @p co depends on the @p colorSpace used.
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*
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* TODO : Document how @p co relates to @p colorSpace
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*
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* TODO : Add documentation about available color spaces.
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*/
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CharacterColor(quint8 colorSpace, int co)
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: _colorSpace(colorSpace),
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_u(0),
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_v(0),
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_w(0)
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{
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switch (colorSpace)
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{
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case COLOR_SPACE_DEFAULT:
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_u = co & 1;
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break;
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case COLOR_SPACE_SYSTEM:
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_u = co & 7;
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_v = (co >> 3) & 1;
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break;
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case COLOR_SPACE_256:
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_u = co & 255;
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break;
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case COLOR_SPACE_RGB:
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_u = co >> 16;
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_v = co >> 8;
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_w = co;
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break;
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default:
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_colorSpace = COLOR_SPACE_UNDEFINED;
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}
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}
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/**
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* Returns true if this character color entry is valid.
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*/
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bool isValid()
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{
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return _colorSpace != COLOR_SPACE_UNDEFINED;
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}
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/**
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* Toggles the value of this color between a normal system color and the corresponding intensive
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* system color.
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*
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* This is only applicable if the color is using the COLOR_SPACE_DEFAULT or COLOR_SPACE_SYSTEM
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* color spaces.
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*/
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void toggleIntensive();
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/**
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* Returns the color within the specified color @p palette
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*
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* The @p palette is only used if this color is one of the 16 system colors, otherwise
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* it is ignored.
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*/
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QColor color(const ColorEntry* palette) const;
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/**
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* Compares two colors and returns true if they represent the same color value and
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* use the same color space.
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*/
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friend bool operator == (const CharacterColor& a, const CharacterColor& b);
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/**
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* Compares two colors and returns true if they represent different color values
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* or use different color spaces.
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*/
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friend bool operator != (const CharacterColor& a, const CharacterColor& b);
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private:
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quint8 _colorSpace;
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// bytes storing the character color
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quint8 _u;
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quint8 _v;
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quint8 _w;
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};
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inline bool operator == (const CharacterColor& a, const CharacterColor& b)
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{
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return a._colorSpace == b._colorSpace &&
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a._u == b._u &&
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a._v == b._v &&
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a._w == b._w;
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}
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inline bool operator != (const CharacterColor& a, const CharacterColor& b)
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{
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return !operator==(a,b);
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}
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inline const QColor color256(quint8 u, const ColorEntry* base)
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{
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// 0.. 16: system colors
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if (u < 8) return base[u+2 ].color; u -= 8;
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if (u < 8) return base[u+2+BASE_COLORS].color; u -= 8;
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// 16..231: 6x6x6 rgb color cube
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if (u < 216) return QColor(((u/36)%6) ? (40*((u/36)%6)+55) : 0,
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((u/ 6)%6) ? (40*((u/ 6)%6)+55) : 0,
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((u/ 1)%6) ? (40*((u/ 1)%6)+55) : 0); u -= 216;
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// 232..255: gray, leaving out black and white
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int gray = u*10+8; return QColor(gray,gray,gray);
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}
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inline QColor CharacterColor::color(const ColorEntry* base) const
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{
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switch (_colorSpace)
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{
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case COLOR_SPACE_DEFAULT: return base[_u+0+(_v?BASE_COLORS:0)].color;
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case COLOR_SPACE_SYSTEM: return base[_u+2+(_v?BASE_COLORS:0)].color;
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case COLOR_SPACE_256: return color256(_u,base);
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case COLOR_SPACE_RGB: return QColor(_u,_v,_w);
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case COLOR_SPACE_UNDEFINED: return QColor();
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}
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Q_ASSERT(false); // invalid color space
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return QColor();
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}
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inline void CharacterColor::toggleIntensive()
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{
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if (_colorSpace == COLOR_SPACE_SYSTEM || _colorSpace == COLOR_SPACE_DEFAULT)
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{
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_v = !_v;
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}
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}
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}
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#endif // CHARACTERCOLOR_H
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