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/*
* vim:ts=4:sw=4:expandtab
*
* i3bar - an xcb-based status- and ws-bar for i3
* © 2010 Axel Wagner and contributors (see also: LICENSE)
*
* mode.c: Handle mode event and show current binding mode in the bar
*
*/
#include "common.h"
#include <stdlib.h>
#include <string.h>
#include <yajl/yajl_parse.h>
/* A datatype to pass through the callbacks to save the state */
struct mode_json_params {
char *cur_key;
char *name;
bool pango_markup;
mode *mode;
};
/*
* Parse a string (change)
*
*/
static int mode_string_cb(void *params_, const unsigned char *val, size_t len) {
struct mode_json_params *params = (struct mode_json_params *)params_;
if (!strcmp(params->cur_key, "change")) {
sasprintf(&(params->name), "%.*s", len, val);
FREE(params->cur_key);
return 1;
}
FREE(params->cur_key);
return 0;
}
/*
* Parse a boolean.
*
*/
static int mode_boolean_cb(void *params_, int val) {
struct mode_json_params *params = (struct mode_json_params *)params_;
if (strcmp(params->cur_key, "pango_markup") == 0) {
DLOG("Setting pango_markup to %d.\n", val);
params->pango_markup = val;
FREE(params->cur_key);
return 1;
}
FREE(params->cur_key);
return 0;
}
/*
* Parse a key.
*
* Essentially we just save it in the parsing state
*
*/
static int mode_map_key_cb(void *params_, const unsigned char *keyVal, size_t keyLen) {
struct mode_json_params *params = (struct mode_json_params *)params_;
FREE(params->cur_key);
sasprintf(&(params->cur_key), "%.*s", keyLen, keyVal);
return 1;
}
static int mode_end_map_cb(void *params_) {
struct mode_json_params *params = (struct mode_json_params *)params_;
/* Save the name */
params->mode->name = i3string_from_utf8(params->name);
i3string_set_markup(params->mode->name, params->pango_markup);
/* Save its rendered width */
params->mode->name_width = predict_text_width(params->mode->name);
DLOG("Got mode change: %s\n", i3string_as_utf8(params->mode->name));
FREE(params->cur_key);
return 1;
}
/* A datastructure to pass all these callbacks to yajl */
static yajl_callbacks mode_callbacks = {
.yajl_string = mode_string_cb,
.yajl_boolean = mode_boolean_cb,
.yajl_map_key = mode_map_key_cb,
.yajl_end_map = mode_end_map_cb,
};
/*
* Parse the received JSON string
*
*/
void parse_mode_json(const unsigned char *json, size_t size) {
struct mode_json_params params;
mode binding;
params.cur_key = NULL;
params.mode = &binding;
yajl_handle handle = yajl_alloc(&mode_callbacks, NULL, (void *)¶ms);
yajl_status state = yajl_parse(handle, json, size);
/* FIXME: Proper error handling for JSON parsing */
switch (state) {
case yajl_status_ok:
break;
case yajl_status_client_canceled:
case yajl_status_error:
ELOG("Could not parse mode event!\n");
exit(EXIT_FAILURE);
break;
}
/* We don't want to indicate default binding mode */
if (strcmp("default", i3string_as_utf8(params.mode->name)) == 0)
I3STRING_FREE(params.mode->name);
/* Set the new binding mode */
set_current_mode(&binding);
yajl_free(handle);
FREE(params.cur_key);
}
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