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Merge branch 'nipunn1313/procps-watch_colors'

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References:
 procps-ng/procps!106
This commit is contained in:
Craig Small 2020-12-22 13:48:15 +11:00
commit 6285bdd3b5
1 changed files with 59 additions and 11 deletions
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70
watch.c
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@ -137,7 +137,41 @@ static void init_ansi_colors(void)
}
static int set_ansi_attribute(const int attrib)
static int process_ansi_color_escape_sequence(char** escape_sequence) {
// process SGR ANSI color escape sequence
// Eg 8-bit
// 38;5;⟨n⟩ (set fg color to n)
// 48;5;⟨n⟩ (set bg color to n)
//
// Eg 24-bit (not yet implemented)
// ESC[ 38;2;⟨r⟩;⟨g⟩;⟨b⟩ m Select RGB foreground color
// ESC[ 48;2;⟨r⟩;⟨g⟩;⟨b⟩ m Select RGB background color
int num;
if ((*escape_sequence)[0] != ';')
return 0; /* not understood */
if ((*escape_sequence)[1] == '5') {
// 8 bit! ANSI specifies a predefined set of 256 colors here.
if ((*escape_sequence)[2] != ';')
return 0; /* not understood */
num = strtol((*escape_sequence) + 3, escape_sequence, 10);
if (num >= 0 && num <= 7) {
// 0-7 are standard colors same as SGR 30-37
return num + 1;
}
// Remainder aren't yet implemented
// 8- 15: high intensity colors (as in ESC [ 90–97 m)
// 16-231: 6 × 6 × 6 cube (216 colors): 16 + 36 × r + 6 × g + b (0 ≤ r, g, b ≤ 5)
// 232-255: grayscale from black to white in 24 steps
}
return 0; /* not understood */
}
static int set_ansi_attribute(const int attrib, char** escape_sequence)
{
switch (attrib) {
case -1: /* restore last settings */
@ -185,12 +219,24 @@ static int set_ansi_attribute(const int attrib)
case 27: /* unset inversed */
attributes &= ~A_REVERSE;
break;
case 39:
fg_col = 0;
break;
case 49:
bg_col = 0;
break;
case 38:
fg_col = process_ansi_color_escape_sequence(escape_sequence);
if (fg_col == 0) {
return 0; /* not understood */
}
break;
case 39:
fg_col = 0;
break;
case 48:
bg_col = process_ansi_color_escape_sequence(escape_sequence);
if (bg_col == 0) {
return 0; /* not understood */
}
break;
case 49:
bg_col = 0;
break;
default:
if (attrib >= 30 && attrib <= 37) { /* set foreground color */
fg_col = attrib - 30 + 1;
@ -207,6 +253,7 @@ static int set_ansi_attribute(const int attrib)
static void process_ansi(FILE * fp)
{
int i, c;
int ansi_attribute;
char buf[MAX_ANSIBUF];
char *numstart, *endptr;
@ -237,10 +284,11 @@ static void process_ansi(FILE * fp)
/* Special case of <ESC>[m */
if (buf[0] == '\0')
set_ansi_attribute(0);
set_ansi_attribute(0, NULL);
for (endptr = numstart = buf; *endptr != '\0'; numstart = endptr + 1) {
if (!set_ansi_attribute(strtol(numstart, &endptr, 10)))
ansi_attribute = strtol(numstart, &endptr, 10);
if (!set_ansi_attribute(ansi_attribute, &endptr))
break;
}
}
@ -522,7 +570,7 @@ static int run_command(char *restrict command, char **restrict command_argv)
for (y = show_title; y < height; y++) {
int eolseen = 0, tabpending = 0, tabwaspending = 0;
if (flags & WATCH_COLOR)
set_ansi_attribute(-1);
set_ansi_attribute(-1, NULL);
#ifdef WITH_WATCH8BIT
wint_t carry = WEOF;
#endif
@ -535,7 +583,7 @@ static int run_command(char *restrict command, char **restrict command_argv)
int attr = 0;
if (tabwaspending && (flags & WATCH_COLOR))
set_ansi_attribute(-1);
set_ansi_attribute(-1, NULL);
tabwaspending = 0;
if (!eolseen) {