2 * vim:ts=4:sw=4:expandtab
4 * i3bar - an xcb-based status- and ws-bar for i3
5 * © 2010 Axel Wagner and contributors (see also: LICENSE)
7 * outputs.c: Maintaining the outputs list
15 #include <yajl/yajl_parse.h>
16 #include <yajl/yajl_version.h>
20 /* A datatype to pass through the callbacks to save the state */
21 struct outputs_json_params {
22 struct outputs_head *outputs;
23 i3_output *outputs_walk;
30 * Parse a null value (current_workspace)
33 static int outputs_null_cb(void *params_) {
34 struct outputs_json_params *params = (struct outputs_json_params *)params_;
36 FREE(params->cur_key);
42 * Parse a boolean value (active)
45 static int outputs_boolean_cb(void *params_, int val) {
46 struct outputs_json_params *params = (struct outputs_json_params *)params_;
48 if (!strcmp(params->cur_key, "active")) {
49 params->outputs_walk->active = val;
50 FREE(params->cur_key);
54 if (!strcmp(params->cur_key, "primary")) {
55 params->outputs_walk->primary = val;
56 FREE(params->cur_key);
64 * Parse an integer (current_workspace or the rect)
67 static int outputs_integer_cb(void *params_, long long val) {
68 struct outputs_json_params *params = (struct outputs_json_params *)params_;
70 if (!strcmp(params->cur_key, "current_workspace")) {
71 params->outputs_walk->ws = (int)val;
72 FREE(params->cur_key);
76 if (!strcmp(params->cur_key, "x")) {
77 params->outputs_walk->rect.x = (int)val;
78 FREE(params->cur_key);
82 if (!strcmp(params->cur_key, "y")) {
83 params->outputs_walk->rect.y = (int)val;
84 FREE(params->cur_key);
88 if (!strcmp(params->cur_key, "width")) {
89 params->outputs_walk->rect.w = (int)val;
90 FREE(params->cur_key);
94 if (!strcmp(params->cur_key, "height")) {
95 params->outputs_walk->rect.h = (int)val;
96 FREE(params->cur_key);
104 * Parse a string (name)
107 static int outputs_string_cb(void *params_, const unsigned char *val, size_t len) {
108 struct outputs_json_params *params = (struct outputs_json_params *)params_;
110 if (!strcmp(params->cur_key, "current_workspace")) {
111 char *copy = smalloc(sizeof(const unsigned char) * (len + 1));
112 strncpy(copy, (const char *)val, len);
117 long parsed_num = strtol(copy, &end, 10);
119 (end && *end == '\0'))
120 params->outputs_walk->ws = parsed_num;
122 FREE(params->cur_key);
126 if (strcmp(params->cur_key, "name")) {
130 char *name = smalloc(sizeof(const unsigned char) * (len + 1));
131 strncpy(name, (const char *)val, len);
134 params->outputs_walk->name = name;
136 FREE(params->cur_key);
142 * We hit the start of a JSON map (rect or a new output)
145 static int outputs_start_map_cb(void *params_) {
146 struct outputs_json_params *params = (struct outputs_json_params *)params_;
147 i3_output *new_output = NULL;
149 if (params->cur_key == NULL) {
150 new_output = smalloc(sizeof(i3_output));
151 new_output->name = NULL;
153 memset(&new_output->rect, 0, sizeof(rect));
154 memset(&new_output->bar, 0, sizeof(surface_t));
155 memset(&new_output->buffer, 0, sizeof(surface_t));
157 new_output->workspaces = smalloc(sizeof(struct ws_head));
158 TAILQ_INIT(new_output->workspaces);
160 new_output->trayclients = smalloc(sizeof(struct tc_head));
161 TAILQ_INIT(new_output->trayclients);
163 params->outputs_walk = new_output;
168 if (!strcmp(params->cur_key, "rect")) {
169 params->in_rect = true;
176 * We hit the end of a map (rect or a new output)
179 static int outputs_end_map_cb(void *params_) {
180 struct outputs_json_params *params = (struct outputs_json_params *)params_;
181 if (params->in_rect) {
182 params->in_rect = false;
183 /* Ignore the end of a rect */
187 /* See if we actually handle that output */
188 if (config.num_outputs > 0) {
189 bool handle_output = false;
190 for (int c = 0; c < config.num_outputs; c++) {
191 if (strcasecmp(params->outputs_walk->name, config.outputs[c]) != 0)
194 handle_output = true;
197 if (!handle_output) {
198 DLOG("Ignoring output \"%s\", not configured to handle it.\n",
199 params->outputs_walk->name);
200 FREE(params->outputs_walk->name);
201 FREE(params->outputs_walk->workspaces);
202 FREE(params->outputs_walk->trayclients);
203 FREE(params->outputs_walk);
204 FREE(params->cur_key);
209 i3_output *target = get_output_by_name(params->outputs_walk->name);
211 if (target == NULL) {
212 SLIST_INSERT_HEAD(outputs, params->outputs_walk, slist);
214 target->active = params->outputs_walk->active;
215 target->primary = params->outputs_walk->primary;
216 target->ws = params->outputs_walk->ws;
217 target->rect = params->outputs_walk->rect;
225 * Essentially we just save it in the parsing state
228 static int outputs_map_key_cb(void *params_, const unsigned char *keyVal, size_t keyLen) {
229 struct outputs_json_params *params = (struct outputs_json_params *)params_;
230 FREE(params->cur_key);
232 params->cur_key = smalloc(sizeof(unsigned char) * (keyLen + 1));
233 strncpy(params->cur_key, (const char *)keyVal, keyLen);
234 params->cur_key[keyLen] = '\0';
239 /* A datastructure to pass all these callbacks to yajl */
240 static yajl_callbacks outputs_callbacks = {
241 .yajl_null = outputs_null_cb,
242 .yajl_boolean = outputs_boolean_cb,
243 .yajl_integer = outputs_integer_cb,
244 .yajl_string = outputs_string_cb,
245 .yajl_start_map = outputs_start_map_cb,
246 .yajl_map_key = outputs_map_key_cb,
247 .yajl_end_map = outputs_end_map_cb,
251 * Initiate the outputs list
254 void init_outputs(void) {
255 outputs = smalloc(sizeof(struct outputs_head));
260 * Start parsing the received JSON string
263 void parse_outputs_json(char *json) {
264 struct outputs_json_params params;
266 params.outputs_walk = NULL;
267 params.cur_key = NULL;
269 params.in_rect = false;
273 handle = yajl_alloc(&outputs_callbacks, NULL, (void *)¶ms);
275 state = yajl_parse(handle, (const unsigned char *)json, strlen(json));
277 /* FIXME: Propper errorhandling for JSON-parsing */
281 case yajl_status_client_canceled:
282 case yajl_status_error:
283 ELOG("Could not parse outputs reply!\n");
292 * Returns the output with the given name
295 i3_output *get_output_by_name(char *name) {
300 SLIST_FOREACH(walk, outputs, slist) {
301 if (!strcmp(walk->name, name)) {