214 lines
5.1 KiB
C++
214 lines
5.1 KiB
C++
/* Styling for ui_file
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Copyright (C) 2018 Free Software Foundation, Inc.
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This file is part of GDB.
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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 3 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, see <http://www.gnu.org/licenses/>. */
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#ifndef UI_STYLE_H
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#define UI_STYLE_H
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/* Styles that can be applied to a ui_file. */
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struct ui_file_style
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{
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/* One of the basic colors that can be handled by ANSI
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terminals. */
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enum basic_color
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{
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NONE = -1,
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BLACK,
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RED,
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GREEN,
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YELLOW,
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BLUE,
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MAGENTA,
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CYAN,
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WHITE
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};
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/* Representation of a terminal color. */
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class color
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{
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public:
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color (basic_color c)
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: m_simple (true),
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m_value (c)
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{
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}
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color (int c)
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: m_simple (true),
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m_value (c)
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{
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gdb_assert (c >= -1 && c <= 255);
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}
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color (uint8_t r, uint8_t g, uint8_t b)
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: m_simple (false),
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m_red (r),
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m_green (g),
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m_blue (b)
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{
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}
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bool operator== (const color &other) const
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{
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if (m_simple != other.m_simple)
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return false;
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if (m_simple)
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return m_value == other.m_value;
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return (m_red == other.m_red && m_green == other.m_green
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&& m_blue == other.m_blue);
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}
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bool operator< (const color &other) const
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{
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if (m_simple != other.m_simple)
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return m_simple < other.m_simple;
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if (m_simple)
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return m_value < other.m_value;
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if (m_red < other.m_red)
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return true;
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if (m_red == other.m_red)
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{
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if (m_green < other.m_green)
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return true;
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if (m_green == other.m_green)
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return m_blue < other.m_blue;
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}
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return false;
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}
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/* Return true if this is the "NONE" color, false otherwise. */
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bool is_none () const
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{
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return m_simple && m_value == NONE;
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}
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/* Return true if this is one of the basic colors, false
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otherwise. */
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bool is_basic () const
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{
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return m_simple && m_value >= BLACK && m_value <= WHITE;
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}
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/* Return the value of a basic color. */
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int get_value () const
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{
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gdb_assert (is_basic ());
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return m_value;
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}
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/* Fill in RGB with the red/green/blue values for this color.
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This may not be called for basic colors or for the "NONE"
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color. */
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void get_rgb (uint8_t *rgb) const;
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/* Append the ANSI terminal escape sequence for this color to STR.
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IS_FG indicates whether this is a foreground or background
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color. Returns true if any characters were written; returns
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false otherwise (which can only happen for the "NONE"
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color). */
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bool append_ansi (bool is_fg, std::string *str) const;
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private:
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bool m_simple;
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int m_value;
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uint8_t m_red, m_green, m_blue;
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};
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/* Intensity settings that are available. */
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enum intensity
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{
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NORMAL = 0,
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BOLD,
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DIM
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};
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ui_file_style () = default;
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ui_file_style (color f, color b, intensity i = NORMAL)
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: m_foreground (f),
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m_background (b),
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m_intensity (i)
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{
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}
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bool operator== (const ui_file_style &other) const
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{
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return (m_foreground == other.m_foreground
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&& m_background == other.m_background
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&& m_intensity == other.m_intensity
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&& m_reverse == other.m_reverse);
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}
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bool operator!= (const ui_file_style &other) const
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{
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return !(*this == other);
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}
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/* Return the ANSI escape sequence for this style. */
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std::string to_ansi () const;
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/* Return true if this style specified reverse display; false
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otherwise. */
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bool is_reverse () const
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{
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return m_reverse;
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}
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/* Return the foreground color of this style. */
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const color &get_foreground () const
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{
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return m_foreground;
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}
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/* Return the background color of this style. */
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const color &get_background () const
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{
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return m_background;
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}
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/* Return the intensity of this style. */
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intensity get_intensity () const
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{
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return m_intensity;
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}
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/* Parse an ANSI escape sequence in BUF, modifying this style. BUF
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must begin with an ESC character. Return true if an escape
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sequence was successfully parsed; false otherwise. In either
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case, N_READ is updated to reflect the number of chars read from
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BUF. */
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bool parse (const char *buf, size_t *n_read);
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private:
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color m_foreground = NONE;
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color m_background = NONE;
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intensity m_intensity = NORMAL;
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bool m_reverse = false;
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};
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/* Skip an ANSI escape sequence in BUF. BUF must begin with an ESC
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character. Return true if an escape sequence was successfully
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skipped; false otherwise. In either case, N_READ is updated to
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reflect the number of chars read from BUF. */
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extern bool skip_ansi_escape (const char *buf, int *n_read);
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#endif /* UI_STYLE_H */
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