wlroots/examples/config.c

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#ifndef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 200809L
#endif
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#include <stdlib.h>
#include <limits.h>
#include <getopt.h>
#include <string.h>
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#include <unistd.h>
#include <wlr/util/log.h>
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#include "shared.h"
#include "config.h"
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#include "ini.h"
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static void usage(const char *name, int ret) {
fprintf(stderr,
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"usage: %s [-C <FILE>]\n"
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"\n"
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" -C <FILE> Path to the configuration file (default: wlr-example.ini).\n"
" See `examples/wlr-example.ini.example` for config file documentation.\n", name);
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exit(ret);
}
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static const char *output_prefix = "output:";
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static const char *device_prefix = "device:";
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static int config_ini_handler(void *user, const char *section, const char *name, const char *value) {
struct example_config *config = user;
if (strncmp(output_prefix, section, strlen(output_prefix)) == 0) {
const char *output_name = section + strlen(output_prefix);
struct output_config *oc;
bool found = false;
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wl_list_for_each(oc, &config->outputs, link) {
if (strcmp(oc->name, output_name) == 0) {
found = true;
break;
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}
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}
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if (!found) {
oc = calloc(1, sizeof(struct output_config));
oc->name = strdup(output_name);
oc->transform = WL_OUTPUT_TRANSFORM_NORMAL;
wl_list_insert(&config->outputs, &oc->link);
}
if (strcmp(name, "x") == 0) {
oc->x = strtol(value, NULL, 10);
} else if (strcmp(name, "y") == 0) {
oc->y = strtol(value, NULL, 10);
} else if (strcmp(name, "rotate") == 0) {
if (strcmp(value, "90") == 0) {
oc->transform = WL_OUTPUT_TRANSFORM_90;
} else if (strcmp(value, "180") == 0) {
oc->transform = WL_OUTPUT_TRANSFORM_180;
} else if (strcmp(value, "270") == 0) {
oc->transform = WL_OUTPUT_TRANSFORM_270;
} else if (strcmp(value, "flipped") == 0) {
oc->transform = WL_OUTPUT_TRANSFORM_FLIPPED;
} else if (strcmp(value, "flipped-90") == 0) {
oc->transform = WL_OUTPUT_TRANSFORM_FLIPPED_90;
} else if (strcmp(value, "flipped-180") == 0) {
oc->transform = WL_OUTPUT_TRANSFORM_FLIPPED_180;
} else if (strcmp(value, "flipped-270") == 0) {
oc->transform = WL_OUTPUT_TRANSFORM_FLIPPED_270;
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} else {
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wlr_log(L_ERROR, "got unknown transform value: %s", value);
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}
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}
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} else if (strcmp(section, "cursor") == 0) {
if (strcmp(name, "map-to-output") == 0) {
config->cursor.mapped_output = strdup(value);
} else {
wlr_log(L_ERROR, "got unknown cursor config: %s", name);
}
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} else if (strncmp(device_prefix, section, strlen(device_prefix)) == 0) {
const char *device_name = section + strlen(device_prefix);
struct device_config *dc;
bool found = false;
wl_list_for_each(dc, &config->devices, link) {
if (strcmp(dc->name, device_name) == 0) {
found = true;
break;
}
}
if (!found) {
dc = calloc(1, sizeof(struct device_config));
dc->name = strdup(device_name);
wl_list_insert(&config->devices, &dc->link);
}
if (strcmp(name, "map-to-output") == 0) {
if (dc->mapped_output) {
free(dc->mapped_output);
}
dc->mapped_output = strdup(value);
} else {
wlr_log(L_ERROR, "got unknown device config: %s", name);
}
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} else {
wlr_log(L_ERROR, "got unknown config section: %s", section);
}
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return 1;
}
struct example_config *parse_args(int argc, char *argv[]) {
struct example_config *config = calloc(1, sizeof(struct example_config));
wl_list_init(&config->outputs);
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wl_list_init(&config->devices);
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int c;
while ((c = getopt(argc, argv, "C:h")) != -1) {
switch (c) {
case 'C':
config->config_path = strdup(optarg);
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break;
case 'h':
case '?':
usage(argv[0], c != 'h');
}
}
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if (!config->config_path) {
// get the config path from the current directory
char cwd[1024];
if (getcwd(cwd, sizeof(cwd)) != NULL) {
char buf[1024];
sprintf(buf, "%s/%s", cwd, "wlr-example.ini");
config->config_path = strdup(buf);
} else {
wlr_log(L_ERROR, "could not get cwd");
exit(1);
}
}
int result = ini_parse(config->config_path, config_ini_handler, config);
if (result == -1) {
wlr_log(L_ERROR, "Could not find config file at %s", config->config_path);
exit(1);
} else if (result == -2) {
wlr_log(L_ERROR, "Could not allocate memory to parse config file");
exit(1);
} else if (result != 0) {
wlr_log(L_ERROR, "Could not parse config file");
exit(1);
}
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return config;
}
void example_config_destroy(struct example_config *config) {
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struct output_config *oc, *otmp = NULL;
wl_list_for_each_safe(oc, otmp, &config->outputs, link) {
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free(oc->name);
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free(oc);
}
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struct device_config *dc, *dtmp = NULL;
wl_list_for_each_safe(dc, dtmp, &config->devices, link) {
free(dc->name);
if (dc->mapped_output) {
free(dc->mapped_output);
}
free(dc);
}
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if (config->config_path) {
free(config->config_path);
}
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if (config->cursor.mapped_output) {
free(config->cursor.mapped_output);
}
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free(config);
}
struct wlr_output_layout *configure_layout(struct example_config *config, struct wl_list *outputs) {
struct wlr_output_layout *layout = wlr_output_layout_init();
int max_x = INT_MIN;
int max_x_y = INT_MIN; // y value for the max_x output
// first add all the configured outputs
struct output_state *output;
wl_list_for_each(output, outputs, link) {
struct output_config *conf;
wl_list_for_each(conf, &config->outputs, link) {
if (strcmp(conf->name, output->output->name) == 0) {
wlr_output_layout_add(layout, output->output,
conf->x, conf->y);
wlr_output_transform(output->output, conf->transform);
int width, height;
wlr_output_effective_resolution(output->output, &width, &height);
if (conf->x + width > max_x) {
max_x = conf->x + width;
max_x_y = conf->y;
}
break;
}
}
}
if (max_x == INT_MIN) {
// couldn't find a configured output
max_x = 0;
max_x_y = 0;
}
// now add all the other configured outputs in a sensible position
wl_list_for_each(output, outputs, link) {
if (wlr_output_layout_get(layout, output->output)) {
continue;
}
wlr_output_layout_add(layout, output->output, max_x, max_x_y);
int width, height;
wlr_output_effective_resolution(output->output, &width, &height);
max_x += width;
}
return layout;
}