mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
416 lines
9.4 KiB
C
416 lines
9.4 KiB
C
/* Styling for ui_file
|
|
Copyright (C) 2018-2022 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
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 3 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, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#include "defs.h"
|
|
#include "ui-style.h"
|
|
#include "gdbsupport/gdb_regex.h"
|
|
|
|
/* A regular expression that is used for matching ANSI terminal escape
|
|
sequences. */
|
|
|
|
static const char ansi_regex_text[] =
|
|
/* Introduction. */
|
|
"^\033\\["
|
|
#define DATA_SUBEXP 1
|
|
/* Capture parameter and intermediate bytes. */
|
|
"("
|
|
/* Parameter bytes. */
|
|
"[\x30-\x3f]*"
|
|
/* Intermediate bytes. */
|
|
"[\x20-\x2f]*"
|
|
/* End the first capture. */
|
|
")"
|
|
/* The final byte. */
|
|
#define FINAL_SUBEXP 2
|
|
"([\x40-\x7e])";
|
|
|
|
/* The number of subexpressions to allocate space for, including the
|
|
"0th" whole match subexpression. */
|
|
#define NUM_SUBEXPRESSIONS 3
|
|
|
|
/* The compiled form of ansi_regex_text. */
|
|
|
|
static regex_t ansi_regex;
|
|
|
|
/* This maps bright colors to RGB triples. The index is the bright
|
|
color index, starting with bright black. The values come from
|
|
xterm. */
|
|
|
|
static const uint8_t bright_colors[][3] = {
|
|
{ 127, 127, 127 }, /* Black. */
|
|
{ 255, 0, 0 }, /* Red. */
|
|
{ 0, 255, 0 }, /* Green. */
|
|
{ 255, 255, 0 }, /* Yellow. */
|
|
{ 92, 92, 255 }, /* Blue. */
|
|
{ 255, 0, 255 }, /* Magenta. */
|
|
{ 0, 255, 255 }, /* Cyan. */
|
|
{ 255, 255, 255 } /* White. */
|
|
};
|
|
|
|
/* See ui-style.h. */
|
|
|
|
bool
|
|
ui_file_style::color::append_ansi (bool is_fg, std::string *str) const
|
|
{
|
|
if (m_simple)
|
|
{
|
|
if (m_value >= BLACK && m_value <= WHITE)
|
|
str->append (std::to_string (m_value + (is_fg ? 30 : 40)));
|
|
else if (m_value > WHITE && m_value <= WHITE + 8)
|
|
str->append (std::to_string (m_value - WHITE + (is_fg ? 90 : 100)));
|
|
else if (m_value != -1)
|
|
{
|
|
str->append (is_fg ? "38;5;" : "48;5;");
|
|
str->append (std::to_string (m_value));
|
|
}
|
|
else
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
str->append (is_fg ? "38;2;" : "48;2;");
|
|
str->append (std::to_string (m_red)
|
|
+ ";" + std::to_string (m_green)
|
|
+ ";" + std::to_string (m_blue));
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/* See ui-style.h. */
|
|
|
|
void
|
|
ui_file_style::color::get_rgb (uint8_t *rgb) const
|
|
{
|
|
if (m_simple)
|
|
{
|
|
/* Can't call this for a basic color or NONE -- those will end
|
|
up in the assert below. */
|
|
if (m_value >= 8 && m_value <= 15)
|
|
memcpy (rgb, bright_colors[m_value - 8], 3 * sizeof (uint8_t));
|
|
else if (m_value >= 16 && m_value <= 231)
|
|
{
|
|
int value = m_value;
|
|
value -= 16;
|
|
/* This obscure formula seems to be what terminals actually
|
|
do. */
|
|
int component = value / 36;
|
|
rgb[0] = component == 0 ? 0 : (55 + component * 40);
|
|
value %= 36;
|
|
component = value / 6;
|
|
rgb[1] = component == 0 ? 0 : (55 + component * 40);
|
|
value %= 6;
|
|
rgb[2] = value == 0 ? 0 : (55 + value * 40);
|
|
}
|
|
else if (m_value >= 232)
|
|
{
|
|
uint8_t v = (m_value - 232) * 10 + 8;
|
|
rgb[0] = v;
|
|
rgb[1] = v;
|
|
rgb[2] = v;
|
|
}
|
|
else
|
|
gdb_assert_not_reached ("get_rgb called on invalid color");
|
|
}
|
|
else
|
|
{
|
|
rgb[0] = m_red;
|
|
rgb[1] = m_green;
|
|
rgb[2] = m_blue;
|
|
}
|
|
}
|
|
|
|
/* See ui-style.h. */
|
|
|
|
std::string
|
|
ui_file_style::to_ansi () const
|
|
{
|
|
std::string result ("\033[");
|
|
bool need_semi = m_foreground.append_ansi (true, &result);
|
|
if (!m_background.is_none ())
|
|
{
|
|
if (need_semi)
|
|
result.push_back (';');
|
|
m_background.append_ansi (false, &result);
|
|
need_semi = true;
|
|
}
|
|
if (m_intensity != NORMAL)
|
|
{
|
|
if (need_semi)
|
|
result.push_back (';');
|
|
result.append (std::to_string (m_intensity));
|
|
need_semi = true;
|
|
}
|
|
if (m_reverse)
|
|
{
|
|
if (need_semi)
|
|
result.push_back (';');
|
|
result.push_back ('7');
|
|
}
|
|
result.push_back ('m');
|
|
return result;
|
|
}
|
|
|
|
/* Read a ";" and a number from STRING. Return the number of
|
|
characters read and put the number into *NUM. */
|
|
|
|
static bool
|
|
read_semi_number (const char *string, regoff_t *idx, long *num)
|
|
{
|
|
if (string[*idx] != ';')
|
|
return false;
|
|
++*idx;
|
|
if (string[*idx] < '0' || string[*idx] > '9')
|
|
return false;
|
|
char *tail;
|
|
*num = strtol (string + *idx, &tail, 10);
|
|
*idx = tail - string;
|
|
return true;
|
|
}
|
|
|
|
/* A helper for ui_file_style::parse that reads an extended color
|
|
sequence; that is, and 8- or 24- bit color. */
|
|
|
|
static bool
|
|
extended_color (const char *str, regoff_t *idx, ui_file_style::color *color)
|
|
{
|
|
long value;
|
|
|
|
if (!read_semi_number (str, idx, &value))
|
|
return false;
|
|
|
|
if (value == 5)
|
|
{
|
|
/* 8-bit color. */
|
|
if (!read_semi_number (str, idx, &value))
|
|
return false;
|
|
|
|
if (value >= 0 && value <= 255)
|
|
*color = ui_file_style::color (value);
|
|
else
|
|
return false;
|
|
}
|
|
else if (value == 2)
|
|
{
|
|
/* 24-bit color. */
|
|
long r, g, b;
|
|
if (!read_semi_number (str, idx, &r)
|
|
|| r > 255
|
|
|| !read_semi_number (str, idx, &g)
|
|
|| g > 255
|
|
|| !read_semi_number (str, idx, &b)
|
|
|| b > 255)
|
|
return false;
|
|
*color = ui_file_style::color (r, g, b);
|
|
}
|
|
else
|
|
{
|
|
/* Unrecognized sequence. */
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* See ui-style.h. */
|
|
|
|
bool
|
|
ui_file_style::parse (const char *buf, size_t *n_read)
|
|
{
|
|
regmatch_t subexps[NUM_SUBEXPRESSIONS];
|
|
|
|
int match = regexec (&ansi_regex, buf, ARRAY_SIZE (subexps), subexps, 0);
|
|
if (match == REG_NOMATCH)
|
|
{
|
|
*n_read = 0;
|
|
return false;
|
|
}
|
|
/* Other failures mean the regexp is broken. */
|
|
gdb_assert (match == 0);
|
|
/* The regexp is anchored. */
|
|
gdb_assert (subexps[0].rm_so == 0);
|
|
/* The final character exists. */
|
|
gdb_assert (subexps[FINAL_SUBEXP].rm_eo - subexps[FINAL_SUBEXP].rm_so == 1);
|
|
|
|
if (buf[subexps[FINAL_SUBEXP].rm_so] != 'm')
|
|
{
|
|
/* We don't handle this sequence, so just drop it. */
|
|
*n_read = subexps[0].rm_eo;
|
|
return false;
|
|
}
|
|
|
|
/* Examine each setting in the match and apply it to the result.
|
|
See the Select Graphic Rendition section of
|
|
https://en.wikipedia.org/wiki/ANSI_escape_code. In essence each
|
|
code is just a number, separated by ";"; there are some more
|
|
wrinkles but we don't support them all.. */
|
|
|
|
/* "\033[m" means the same thing as "\033[0m", so handle that
|
|
specially here. */
|
|
if (subexps[DATA_SUBEXP].rm_so == subexps[DATA_SUBEXP].rm_eo)
|
|
*this = ui_file_style ();
|
|
|
|
for (regoff_t i = subexps[DATA_SUBEXP].rm_so;
|
|
i < subexps[DATA_SUBEXP].rm_eo;
|
|
++i)
|
|
{
|
|
if (buf[i] == ';')
|
|
{
|
|
/* Skip. */
|
|
}
|
|
else if (buf[i] >= '0' && buf[i] <= '9')
|
|
{
|
|
char *tail;
|
|
long value = strtol (buf + i, &tail, 10);
|
|
i = tail - buf;
|
|
|
|
switch (value)
|
|
{
|
|
case 0:
|
|
/* Reset. */
|
|
*this = ui_file_style ();
|
|
break;
|
|
case 1:
|
|
/* Bold. */
|
|
m_intensity = BOLD;
|
|
break;
|
|
case 2:
|
|
/* Dim. */
|
|
m_intensity = DIM;
|
|
break;
|
|
case 7:
|
|
/* Reverse. */
|
|
m_reverse = true;
|
|
break;
|
|
case 21:
|
|
m_intensity = NORMAL;
|
|
break;
|
|
case 22:
|
|
/* Normal. */
|
|
m_intensity = NORMAL;
|
|
break;
|
|
case 27:
|
|
/* Inverse off. */
|
|
m_reverse = false;
|
|
break;
|
|
|
|
case 30:
|
|
case 31:
|
|
case 32:
|
|
case 33:
|
|
case 34:
|
|
case 35:
|
|
case 36:
|
|
case 37:
|
|
/* Note: not 38. */
|
|
case 39:
|
|
m_foreground = color (value - 30);
|
|
break;
|
|
|
|
case 40:
|
|
case 41:
|
|
case 42:
|
|
case 43:
|
|
case 44:
|
|
case 45:
|
|
case 46:
|
|
case 47:
|
|
/* Note: not 48. */
|
|
case 49:
|
|
m_background = color (value - 40);
|
|
break;
|
|
|
|
case 90:
|
|
case 91:
|
|
case 92:
|
|
case 93:
|
|
case 94:
|
|
case 95:
|
|
case 96:
|
|
case 97:
|
|
m_foreground = color (value - 90 + 8);
|
|
break;
|
|
|
|
case 100:
|
|
case 101:
|
|
case 102:
|
|
case 103:
|
|
case 104:
|
|
case 105:
|
|
case 106:
|
|
case 107:
|
|
m_background = color (value - 100 + 8);
|
|
break;
|
|
|
|
case 38:
|
|
/* If we can't parse the extended color, fail. */
|
|
if (!extended_color (buf, &i, &m_foreground))
|
|
{
|
|
*n_read = subexps[0].rm_eo;
|
|
return false;
|
|
}
|
|
break;
|
|
|
|
case 48:
|
|
/* If we can't parse the extended color, fail. */
|
|
if (!extended_color (buf, &i, &m_background))
|
|
{
|
|
*n_read = subexps[0].rm_eo;
|
|
return false;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
/* Ignore everything else. */
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Unknown, let's just ignore. */
|
|
}
|
|
}
|
|
|
|
*n_read = subexps[0].rm_eo;
|
|
return true;
|
|
}
|
|
|
|
/* See ui-style.h. */
|
|
|
|
bool
|
|
skip_ansi_escape (const char *buf, int *n_read)
|
|
{
|
|
regmatch_t subexps[NUM_SUBEXPRESSIONS];
|
|
|
|
int match = regexec (&ansi_regex, buf, ARRAY_SIZE (subexps), subexps, 0);
|
|
if (match == REG_NOMATCH || buf[subexps[FINAL_SUBEXP].rm_so] != 'm')
|
|
return false;
|
|
|
|
*n_read = subexps[FINAL_SUBEXP].rm_eo;
|
|
return true;
|
|
}
|
|
|
|
void _initialize_ui_style ();
|
|
void
|
|
_initialize_ui_style ()
|
|
{
|
|
int code = regcomp (&ansi_regex, ansi_regex_text, REG_EXTENDED);
|
|
/* If the regular expression was incorrect, it was a programming
|
|
error. */
|
|
gdb_assert (code == 0);
|
|
}
|