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sway/swaynag/config.c
Brian Ashworth 97f9f0b699 parse_color: return success + drop fallback color 
This is the first in a series of commits to refactor the color handling
in sway. This changes parse_color to return whether it was success and
no longer uses 0xFFFFFFFF as the fallback color. This also verifies that
the string actually contains a valid hexadecimal number along with
the length checks.

In the process of altering the calls to parse_color, I also took the
opportunity to heavily refactor swaybar's ipc_parse_colors function.
This allowed for several lines of duplicated code to be removed.
2019-12-28 10:07:25 +01:00

384 lines
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#define _POSIX_C_SOURCE 200809L
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <wordexp.h>
#include <unistd.h>
#include "log.h"
#include "list.h"
#include "swaynag/swaynag.h"
#include "swaynag/types.h"
#include "util.h"
#include "wlr-layer-shell-unstable-v1-client-protocol.h"
static char *read_from_stdin(void) {
char *buffer = NULL;
size_t buffer_len = 0;
char *line = NULL;
size_t line_size = 0;
ssize_t nread;
while ((nread = getline(&line, &line_size, stdin)) != -1) {
buffer = realloc(buffer, buffer_len + nread + 1);
snprintf(&buffer[buffer_len], nread + 1, "%s", line);
buffer_len += nread;
}
free(line);
while (buffer && buffer[buffer_len - 1] == '\n') {
buffer[--buffer_len] = '\0';
}
return buffer;
}
int swaynag_parse_options(int argc, char **argv, struct swaynag *swaynag,
list_t *types, struct swaynag_type *type, char **config, bool *debug) {
enum type_options {
TO_COLOR_BACKGROUND = 256,
TO_COLOR_BORDER,
TO_COLOR_BORDER_BOTTOM,
TO_COLOR_BUTTON,
TO_COLOR_TEXT,
TO_THICK_BAR_BORDER,
TO_PADDING_MESSAGE,
TO_THICK_DET_BORDER,
TO_THICK_BTN_BORDER,
TO_GAP_BTN,
TO_GAP_BTN_DISMISS,
TO_MARGIN_BTN_RIGHT,
TO_PADDING_BTN,
};
static struct option opts[] = {
{"button", required_argument, NULL, 'b'},
{"button-no-terminal", required_argument, NULL, 'B'},
{"config", required_argument, NULL, 'c'},
{"debug", no_argument, NULL, 'd'},
{"edge", required_argument, NULL, 'e'},
{"font", required_argument, NULL, 'f'},
{"help", no_argument, NULL, 'h'},
{"detailed-message", no_argument, NULL, 'l'},
{"detailed-button", required_argument, NULL, 'L'},
{"message", required_argument, NULL, 'm'},
{"output", required_argument, NULL, 'o'},
{"dismiss-button", required_argument, NULL, 's'},
{"type", required_argument, NULL, 't'},
{"version", no_argument, NULL, 'v'},
{"background", required_argument, NULL, TO_COLOR_BACKGROUND},
{"border", required_argument, NULL, TO_COLOR_BORDER},
{"border-bottom", required_argument, NULL, TO_COLOR_BORDER_BOTTOM},
{"button-background", required_argument, NULL, TO_COLOR_BUTTON},
{"text", required_argument, NULL, TO_COLOR_TEXT},
{"border-bottom-size", required_argument, NULL, TO_THICK_BAR_BORDER},
{"message-padding", required_argument, NULL, TO_PADDING_MESSAGE},
{"details-border-size", required_argument, NULL, TO_THICK_DET_BORDER},
{"button-border-size", required_argument, NULL, TO_THICK_BTN_BORDER},
{"button-gap", required_argument, NULL, TO_GAP_BTN},
{"button-dismiss-gap", required_argument, NULL, TO_GAP_BTN_DISMISS},
{"button-margin-right", required_argument, NULL, TO_MARGIN_BTN_RIGHT},
{"button-padding", required_argument, NULL, TO_PADDING_BTN},
{0, 0, 0, 0}
};
const char *usage =
"Usage: swaynag [options...]\n"
"\n"
" -b, --button <text> <action> Create a button with text that "
"executes action in a terminal when pressed. Multiple buttons can "
"be defined.\n"
" -B, --button-no-terminal <text> <action> Like --button, but does"
"not run the action in a terminal.\n"
" -c, --config <path> Path to config file.\n"
" -d, --debug Enable debugging.\n"
" -e, --edge top|bottom Set the edge to use.\n"
" -f, --font <font> Set the font to use.\n"
" -h, --help Show help message and quit.\n"
" -l, --detailed-message Read a detailed message from stdin.\n"
" -L, --detailed-button <text> Set the text of the detail button.\n"
" -m, --message <msg> Set the message text.\n"
" -o, --output <output> Set the output to use.\n"
" -s, --dismiss-button <text> Set the dismiss button text.\n"
" -t, --type <type> Set the message type.\n"
" -v, --version Show the version number and quit.\n"
"\n"
"The following appearance options can also be given:\n"
" --background RRGGBB[AA] Background color.\n"
" --border RRGGBB[AA] Border color.\n"
" --border-bottom RRGGBB[AA] Bottom border color.\n"
" --button-background RRGGBB[AA] Button background color.\n"
" --text RRGGBB[AA] Text color.\n"
" --border-bottom-size size Thickness of the bar border.\n"
" --message-padding padding Padding for the message.\n"
" --details-border-size size Thickness for the details border.\n"
" --button-border-size size Thickness for the button border.\n"
" --button-gap gap Size of the gap between buttons\n"
" --button-dismiss-gap gap Size of the gap for dismiss button.\n"
" --button-margin-right margin Margin from dismiss button to edge.\n"
" --button-padding padding Padding for the button text.\n";
optind = 1;
while (1) {
int c = getopt_long(argc, argv, "b:B:c:de:f:hlL:m:o:s:t:v", opts, NULL);
if (c == -1) {
break;
}
switch (c) {
case 'b': // Button
case 'B': // Button (No Terminal)
if (swaynag) {
if (optind >= argc) {
fprintf(stderr, "Missing action for button %s\n", optarg);
return EXIT_FAILURE;
}
struct swaynag_button *button;
button = calloc(sizeof(struct swaynag_button), 1);
button->text = strdup(optarg);
button->type = SWAYNAG_ACTION_COMMAND;
button->action = strdup(argv[optind]);
button->terminal = c == 'b';
list_add(swaynag->buttons, button);
}
optind++;
break;
case 'c': // Config
if (config) {
*config = strdup(optarg);
}
break;
case 'd': // Debug
if (debug) {
*debug = true;
}
break;
case 'e': // Edge
if (type) {
if (strcmp(optarg, "top") == 0) {
type->anchors = ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP
| ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT
| ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT;
} else if (strcmp(optarg, "bottom") == 0) {
type->anchors = ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM
| ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT
| ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT;
} else {
fprintf(stderr, "Invalid edge: %s\n", optarg);
return EXIT_FAILURE;
}
}
break;
case 'f': // Font
if (type) {
free(type->font);
type->font = strdup(optarg);
}
break;
case 'l': // Detailed Message
if (swaynag) {
free(swaynag->details.message);
swaynag->details.message = read_from_stdin();
swaynag->details.button_up.text = strdup("▲");
swaynag->details.button_down.text = strdup("▼");
}
break;
case 'L': // Detailed Button Text
if (swaynag) {
free(swaynag->details.button_details->text);
swaynag->details.button_details->text = strdup(optarg);
}
break;
case 'm': // Message
if (swaynag) {
free(swaynag->message);
swaynag->message = strdup(optarg);
}
break;
case 'o': // Output
if (type) {
free(type->output);
type->output = strdup(optarg);
}
break;
case 's': // Dismiss Button Text
if (swaynag) {
struct swaynag_button *button_close;
button_close = swaynag->buttons->items[0];
free(button_close->text);
button_close->text = strdup(optarg);
}
break;
case 't': // Type
if (swaynag) {
swaynag->type = swaynag_type_get(types, optarg);
if (!swaynag->type) {
fprintf(stderr, "Unknown type %s\n", optarg);
return EXIT_FAILURE;
}
}
break;
case 'v': // Version
fprintf(stdout, "swaynag version " SWAY_VERSION "\n");
return -1;
case TO_COLOR_BACKGROUND: // Background color
if (type && !parse_color(optarg, &type->background)) {
fprintf(stderr, "Invalid background color: %s", optarg);
}
break;
case TO_COLOR_BORDER: // Border color
if (type && !parse_color(optarg, &type->border)) {
fprintf(stderr, "Invalid border color: %s", optarg);
}
break;
case TO_COLOR_BORDER_BOTTOM: // Bottom border color
if (type && !parse_color(optarg, &type->border_bottom)) {
fprintf(stderr, "Invalid border bottom color: %s", optarg);
}
break;
case TO_COLOR_BUTTON: // Button background color
if (type && !parse_color(optarg, &type->button_background)) {
fprintf(stderr, "Invalid button background color: %s", optarg);
}
break;
case TO_COLOR_TEXT: // Text color
if (type && !parse_color(optarg, &type->text)) {
fprintf(stderr, "Invalid text color: %s", optarg);
}
break;
case TO_THICK_BAR_BORDER: // Bottom border thickness
if (type) {
type->bar_border_thickness = strtol(optarg, NULL, 0);
}
break;
case TO_PADDING_MESSAGE: // Message padding
if (type) {
type->message_padding = strtol(optarg, NULL, 0);
}
break;
case TO_THICK_DET_BORDER: // Details border thickness
if (type) {
type->details_border_thickness = strtol(optarg, NULL, 0);
}
break;
case TO_THICK_BTN_BORDER: // Button border thickness
if (type) {
type->button_border_thickness = strtol(optarg, NULL, 0);
}
break;
case TO_GAP_BTN: // Gap between buttons
if (type) {
type->button_gap = strtol(optarg, NULL, 0);
}
break;
case TO_GAP_BTN_DISMISS: // Gap between dismiss button
if (type) {
type->button_gap_close = strtol(optarg, NULL, 0);
}
break;
case TO_MARGIN_BTN_RIGHT: // Margin on the right side of button area
if (type) {
type->button_margin_right = strtol(optarg, NULL, 0);
}
break;
case TO_PADDING_BTN: // Padding for the button text
if (type) {
type->button_padding = strtol(optarg, NULL, 0);
}
break;
default: // Help or unknown flag
fprintf(c == 'h' ? stdout : stderr, "%s", usage);
return -1;
}
}
return 0;
}
static bool file_exists(const char *path) {
return path && access(path, R_OK) != -1;
}
char *swaynag_get_config_path(void) {
static const char *config_paths[] = {
"$HOME/.swaynag/config",
"$XDG_CONFIG_HOME/swaynag/config",
SYSCONFDIR "/swaynag/config",
};
char *config_home = getenv("XDG_CONFIG_HOME");
if (!config_home || config_home[0] == '\0') {
config_paths[1] = "$HOME/.config/swaynag/config";
}
wordexp_t p;
for (size_t i = 0; i < sizeof(config_paths) / sizeof(char *); ++i) {
if (wordexp(config_paths[i], &p, 0) == 0) {
char *path = strdup(p.we_wordv[0]);
wordfree(&p);
if (file_exists(path)) {
return path;
}
free(path);
}
}
return NULL;
}
int swaynag_load_config(char *path, struct swaynag *swaynag, list_t *types) {
FILE *config = fopen(path, "r");
if (!config) {
fprintf(stderr, "Failed to read config. Running without it.\n");
return 0;
}
struct swaynag_type *type = swaynag_type_new("<config>");
list_add(types, type);
char *line = NULL;
size_t line_size = 0;
ssize_t nread;
int line_number = 0;
int result = 0;
while ((nread = getline(&line, &line_size, config)) != -1) {
line_number++;
if (!*line || line[0] == '\n' || line[0] == '#') {
continue;
}
if (line[nread - 1] == '\n') {
line[nread - 1] = '\0';
}
if (line[0] == '[') {
char *close = strchr(line, ']');
if (!close) {
fprintf(stderr, "Closing bracket not found on line %d\n",
line_number);
result = 1;
break;
}
char *name = calloc(1, close - line);
strncat(name, line + 1, close - line - 1);
type = swaynag_type_get(types, name);
if (!type) {
type = swaynag_type_new(name);
list_add(types, type);
}
free(name);
} else {
char *flag = malloc(sizeof(char) * (nread + 3));
sprintf(flag, "--%s", line);
char *argv[] = {"swaynag", flag};
result = swaynag_parse_options(2, argv, swaynag, types, type,
NULL, NULL);
free(flag);
if (result != 0) {
break;
}
}
}
free(line);
fclose(config);
return result;
}
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