gri3-wm/i3bar/src/outputs.c

320 lines
7.9 KiB
C

/*
* vim:ts=4:sw=4:expandtab
*
* i3bar - an xcb-based status- and ws-bar for i3
* © 2010 Axel Wagner and contributors (see also: LICENSE)
*
* outputs.c: Maintaining the outputs list
*
*/
#include "common.h"
#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>
/* A datatype to pass through the callbacks to save the state */
struct outputs_json_params {
struct outputs_head *outputs;
i3_output *outputs_walk;
char *cur_key;
char *json;
bool in_rect;
};
/*
* Parse a null value (current_workspace)
*
*/
static int outputs_null_cb(void *params_) {
struct outputs_json_params *params = (struct outputs_json_params *)params_;
FREE(params->cur_key);
return 1;
}
/*
* Parse a boolean value (active)
*
*/
static int outputs_boolean_cb(void *params_, int val) {
struct outputs_json_params *params = (struct outputs_json_params *)params_;
if (!strcmp(params->cur_key, "active")) {
params->outputs_walk->active = val;
FREE(params->cur_key);
return 1;
}
if (!strcmp(params->cur_key, "primary")) {
params->outputs_walk->primary = val;
FREE(params->cur_key);
return 1;
}
return 0;
}
/*
* Parse an integer (current_workspace or the rect)
*
*/
static int outputs_integer_cb(void *params_, long long val) {
struct outputs_json_params *params = (struct outputs_json_params *)params_;
if (!strcmp(params->cur_key, "current_workspace")) {
params->outputs_walk->ws = (int)val;
FREE(params->cur_key);
return 1;
}
if (!strcmp(params->cur_key, "x")) {
params->outputs_walk->rect.x = (int)val;
FREE(params->cur_key);
return 1;
}
if (!strcmp(params->cur_key, "y")) {
params->outputs_walk->rect.y = (int)val;
FREE(params->cur_key);
return 1;
}
if (!strcmp(params->cur_key, "width")) {
params->outputs_walk->rect.w = (int)val;
FREE(params->cur_key);
return 1;
}
if (!strcmp(params->cur_key, "height")) {
params->outputs_walk->rect.h = (int)val;
FREE(params->cur_key);
return 1;
}
return 0;
}
/*
* Parse a string (name)
*
*/
static int outputs_string_cb(void *params_, const unsigned char *val, size_t len) {
struct outputs_json_params *params = (struct outputs_json_params *)params_;
if (!strcmp(params->cur_key, "current_workspace")) {
char *copy = NULL;
sasprintf(&copy, "%.*s", len, val);
char *end;
errno = 0;
long parsed_num = strtol(copy, &end, 10);
if (errno == 0 &&
(end && *end == '\0'))
params->outputs_walk->ws = parsed_num;
FREE(copy);
FREE(params->cur_key);
return 1;
}
if (strcmp(params->cur_key, "name")) {
return 0;
}
sasprintf(&(params->outputs_walk->name), "%.*s", len, val);
FREE(params->cur_key);
return 1;
}
/*
* We hit the start of a JSON map (rect or a new output)
*
*/
static int outputs_start_map_cb(void *params_) {
struct outputs_json_params *params = (struct outputs_json_params *)params_;
i3_output *new_output = NULL;
if (params->cur_key == NULL) {
new_output = smalloc(sizeof(i3_output));
new_output->name = NULL;
new_output->active = false;
new_output->primary = false;
new_output->visible = false;
new_output->ws = 0,
new_output->statusline_width = 0;
new_output->statusline_short_text = false;
memset(&new_output->rect, 0, sizeof(rect));
memset(&new_output->bar, 0, sizeof(surface_t));
memset(&new_output->buffer, 0, sizeof(surface_t));
memset(&new_output->statusline_buffer, 0, sizeof(surface_t));
new_output->workspaces = smalloc(sizeof(struct ws_head));
TAILQ_INIT(new_output->workspaces);
new_output->trayclients = smalloc(sizeof(struct tc_head));
TAILQ_INIT(new_output->trayclients);
params->outputs_walk = new_output;
return 1;
}
if (!strcmp(params->cur_key, "rect")) {
params->in_rect = true;
}
return 1;
}
/*
* We hit the end of a map (rect or a new output)
*
*/
static int outputs_end_map_cb(void *params_) {
struct outputs_json_params *params = (struct outputs_json_params *)params_;
if (params->in_rect) {
params->in_rect = false;
/* Ignore the end of a rect */
return 1;
}
/* See if we actually handle that output */
if (config.num_outputs > 0) {
bool handle_output = false;
for (int c = 0; c < config.num_outputs; c++) {
if (strcasecmp(params->outputs_walk->name, config.outputs[c]) == 0 ||
(strcasecmp(config.outputs[c], "primary") == 0 &&
params->outputs_walk->primary)) {
handle_output = true;
break;
}
}
if (!handle_output) {
DLOG("Ignoring output \"%s\", not configured to handle it.\n",
params->outputs_walk->name);
FREE(params->outputs_walk->name);
FREE(params->outputs_walk->workspaces);
FREE(params->outputs_walk->trayclients);
FREE(params->outputs_walk);
FREE(params->cur_key);
return 1;
}
}
i3_output *target = get_output_by_name(params->outputs_walk->name);
if (target == NULL) {
SLIST_INSERT_HEAD(outputs, params->outputs_walk, slist);
} else {
target->active = params->outputs_walk->active;
target->primary = params->outputs_walk->primary;
target->ws = params->outputs_walk->ws;
target->rect = params->outputs_walk->rect;
}
return 1;
}
/*
* Parse a key.
*
* Essentially we just save it in the parsing state
*
*/
static int outputs_map_key_cb(void *params_, const unsigned char *keyVal, size_t keyLen) {
struct outputs_json_params *params = (struct outputs_json_params *)params_;
FREE(params->cur_key);
sasprintf(&(params->cur_key), "%.*s", keyLen, keyVal);
return 1;
}
/* A datastructure to pass all these callbacks to yajl */
static yajl_callbacks outputs_callbacks = {
.yajl_null = outputs_null_cb,
.yajl_boolean = outputs_boolean_cb,
.yajl_integer = outputs_integer_cb,
.yajl_string = outputs_string_cb,
.yajl_start_map = outputs_start_map_cb,
.yajl_map_key = outputs_map_key_cb,
.yajl_end_map = outputs_end_map_cb,
};
/*
* Initiate the outputs list
*
*/
void init_outputs(void) {
outputs = smalloc(sizeof(struct outputs_head));
SLIST_INIT(outputs);
}
/*
* Start parsing the received JSON string
*
*/
void parse_outputs_json(char *json) {
struct outputs_json_params params;
params.outputs_walk = NULL;
params.cur_key = NULL;
params.json = json;
params.in_rect = false;
yajl_handle handle;
yajl_status state;
handle = yajl_alloc(&outputs_callbacks, NULL, (void *)&params);
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:
case yajl_status_error:
ELOG("Could not parse outputs reply!\n");
exit(EXIT_FAILURE);
break;
}
yajl_free(handle);
}
/*
* Returns the output with the given name
*
*/
i3_output *get_output_by_name(char *name) {
i3_output *walk;
if (name == NULL) {
return NULL;
}
SLIST_FOREACH(walk, outputs, slist) {
if (!strcmp(walk->name, name)) {
break;
}
}
return walk;
}
/*
* Returns true if the output has the currently focused workspace
*
*/
bool output_has_focus(i3_output *output) {
i3_ws *ws_walk;
TAILQ_FOREACH(ws_walk, output->workspaces, tailq) {
if (ws_walk->focused) {
return true;
}
}
return false;
}