gri3-wm/i3bar/src/config.c

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/*
* vim:ts=4:sw=4:expandtab
*
* i3bar - an xcb-based status- and ws-bar for i3
* © 2010-2011 Axel Wagner and contributors (see also: LICENSE)
*
* config.c: Parses the configuration (received from i3).
*
*/
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <i3/ipc.h>
#include <yajl/yajl_parse.h>
#include <yajl/yajl_version.h>
#include <X11/Xlib.h>
#include "common.h"
static char *cur_key;
/*
* Parse a key.
*
* Essentially we just save it in cur_key.
*
*/
#if YAJL_MAJOR >= 2
static int config_map_key_cb(void *params_, const unsigned char *keyVal, size_t keyLen) {
#else
static int config_map_key_cb(void *params_, const unsigned char *keyVal, unsigned keyLen) {
#endif
FREE(cur_key);
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cur_key = smalloc(sizeof(unsigned char) * (keyLen + 1));
strncpy(cur_key, (const char*) keyVal, keyLen);
cur_key[keyLen] = '\0';
return 1;
}
/*
* Parse a null-value (current_workspace)
*
*/
static int config_null_cb(void *params_) {
if (!strcmp(cur_key, "id")) {
/* If 'id' is NULL, the bar config was not found. Error out. */
ELOG("No such bar config. Use 'i3-msg -t get_bar_config' to get the available configs.\n");
ELOG("Are you starting i3bar by hand? You should not:\n");
ELOG("Configure a 'bar' block in your i3 config and i3 will launch i3bar automatically.\n");
exit(EXIT_FAILURE);
}
return 1;
}
/*
* Parse a string
*
*/
#if YAJL_MAJOR >= 2
static int config_string_cb(void *params_, const unsigned char *val, size_t _len) {
#else
static int config_string_cb(void *params_, const unsigned char *val, unsigned int _len) {
#endif
int len = (int)_len;
/* The id and socket_path are ignored, we already know them. */
if (!strcmp(cur_key, "id") || !strcmp(cur_key, "socket_path"))
return 1;
if (!strcmp(cur_key, "mode")) {
DLOG("mode = %.*s, len = %d\n", len, val, len);
config.hide_on_modifier = (len == 4 && !strncmp((const char*)val, "hide", strlen("hide")));
return 1;
}
if (!strcmp(cur_key, "modifier")) {
DLOG("modifier = %.*s\n", len, val);
if (len == 5 && !strncmp((const char*)val, "shift", strlen("shift"))) {
config.modifier = ShiftMask;
return 1;
}
if (len == 4 && !strncmp((const char*)val, "ctrl", strlen("ctrl"))) {
config.modifier = ControlMask;
return 1;
}
if (len == 4 && !strncmp((const char*)val, "Mod", strlen("Mod"))) {
switch (val[3]) {
case '1':
config.modifier = Mod1Mask;
return 1;
case '2':
config.modifier = Mod2Mask;
return 1;
case '3':
config.modifier = Mod3Mask;
return 1;
/*
case '4':
config.modifier = Mod4Mask;
return 1;
*/
case '5':
config.modifier = Mod5Mask;
return 1;
}
}
config.modifier = Mod4Mask;
return 1;
}
if (!strcmp(cur_key, "position")) {
DLOG("position = %.*s\n", len, val);
config.position = (len == 3 && !strncmp((const char*)val, "top", strlen("top")) ? POS_TOP : POS_BOT);
return 1;
}
if (!strcmp(cur_key, "status_command")) {
/* We cannot directly start the child here, because start_child() also
* needs to be run when no command was specified (to setup stdin).
* Therefore we save the command in 'config' and access it later in
* got_bar_config() */
DLOG("command = %.*s\n", len, val);
sasprintf(&config.command, "%.*s", len, val);
return 1;
}
if (!strcmp(cur_key, "font")) {
DLOG("font = %.*s\n", len, val);
sasprintf(&config.fontname, "%.*s", len, val);
return 1;
}
if (!strcmp(cur_key, "outputs")) {
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DLOG("+output %.*s\n", len, val);
int new_num_outputs = config.num_outputs + 1;
config.outputs = srealloc(config.outputs, sizeof(char*) * new_num_outputs);
sasprintf(&config.outputs[config.num_outputs], "%.*s", len, val);
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config.num_outputs = new_num_outputs;
return 1;
}
if (!strcmp(cur_key, "tray_output")) {
DLOG("tray_output %.*s\n", len, val);
FREE(config.tray_output);
sasprintf(&config.tray_output, "%.*s", len, val);
return 1;
}
#define COLOR(json_name, struct_name) \
do { \
if (!strcmp(cur_key, #json_name)) { \
DLOG(#json_name " = " #struct_name " = %.*s\n", len, val); \
sasprintf(&(config.colors.struct_name), "%.*s", len, val); \
return 1; \
} \
} while (0)
COLOR(statusline, bar_fg);
COLOR(background, bar_bg);
COLOR(focused_workspace_border, focus_ws_border);
COLOR(focused_workspace_bg, focus_ws_bg);
COLOR(focused_workspace_text, focus_ws_fg);
COLOR(active_workspace_border, active_ws_border);
COLOR(active_workspace_bg, active_ws_bg);
COLOR(active_workspace_text, active_ws_fg);
COLOR(inactive_workspace_border, inactive_ws_border);
COLOR(inactive_workspace_bg, inactive_ws_bg);
COLOR(inactive_workspace_text, inactive_ws_fg);
COLOR(urgent_workspace_border, urgent_ws_border);
COLOR(urgent_workspace_bg, urgent_ws_bg);
COLOR(urgent_workspace_text, urgent_ws_fg);
printf("got unexpected string %.*s for cur_key = %s\n", len, val, cur_key);
return 0;
}
/*
* Parse a boolean value
*
*/
static int config_boolean_cb(void *params_, int val) {
if (!strcmp(cur_key, "workspace_buttons")) {
DLOG("workspace_buttons = %d\n", val);
config.disable_ws = !val;
return 1;
}
if (!strcmp(cur_key, "verbose")) {
DLOG("verbose = %d\n", val);
config.verbose = val;
return 1;
}
return 0;
}
/* A datastructure to pass all these callbacks to yajl */
static yajl_callbacks outputs_callbacks = {
&config_null_cb,
&config_boolean_cb,
NULL,
NULL,
NULL,
&config_string_cb,
NULL,
&config_map_key_cb,
NULL,
NULL,
NULL
};
/*
* Start parsing the received bar configuration json-string
*
*/
void parse_config_json(char *json) {
yajl_handle handle;
yajl_status state;
#if YAJL_MAJOR < 2
yajl_parser_config parse_conf = { 0, 0 };
handle = yajl_alloc(&outputs_callbacks, &parse_conf, NULL, NULL);
#else
handle = yajl_alloc(&outputs_callbacks, NULL, NULL);
#endif
state = yajl_parse(handle, (const unsigned char*) json, strlen(json));
/* FIXME: Proper errorhandling for JSON-parsing */
switch (state) {
case yajl_status_ok:
break;
case yajl_status_client_canceled:
#if YAJL_MAJOR < 2
case yajl_status_insufficient_data:
#endif
case yajl_status_error:
ELOG("Could not parse config-reply!\n");
exit(EXIT_FAILURE);
break;
}
yajl_free(handle);
}
/*
* free()s the color strings as soon as they are not needed anymore.
*
*/
void free_colors(struct xcb_color_strings_t *colors) {
#define FREE_COLOR(x) \
do { \
if (colors->x) \
free(colors->x); \
} while (0)
FREE_COLOR(bar_fg);
FREE_COLOR(bar_bg);
FREE_COLOR(active_ws_fg);
FREE_COLOR(active_ws_bg);
FREE_COLOR(active_ws_border);
FREE_COLOR(inactive_ws_fg);
FREE_COLOR(inactive_ws_bg);
FREE_COLOR(inactive_ws_border);
FREE_COLOR(urgent_ws_fg);
FREE_COLOR(urgent_ws_bg);
FREE_COLOR(urgent_ws_border);
FREE_COLOR(focus_ws_fg);
FREE_COLOR(focus_ws_bg);
FREE_COLOR(focus_ws_border);
#undef FREE_COLOR
}