280 lines
7.8 KiB
C
280 lines
7.8 KiB
C
/*
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* vim:ts=4:sw=4:expandtab
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*
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* i3bar - an xcb-based status- and ws-bar for i3
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* © 2010 Axel Wagner and contributors (see also: LICENSE)
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*
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* workspaces.c: Maintaining the workspace lists
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*
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*/
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#include "common.h"
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#include <stdlib.h>
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#include <string.h>
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#include <yajl/yajl_parse.h>
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/* A datatype to pass through the callbacks to save the state */
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struct workspaces_json_params {
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struct ws_head *workspaces;
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i3_ws *workspaces_walk;
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char *cur_key;
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char *json;
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};
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/*
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* Parse a boolean value (visible, focused, urgent)
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*
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*/
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static int workspaces_boolean_cb(void *params_, int val) {
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struct workspaces_json_params *params = (struct workspaces_json_params *)params_;
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if (!strcmp(params->cur_key, "visible")) {
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params->workspaces_walk->visible = val;
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FREE(params->cur_key);
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return 1;
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}
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if (!strcmp(params->cur_key, "focused")) {
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params->workspaces_walk->focused = val;
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FREE(params->cur_key);
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return 1;
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}
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if (!strcmp(params->cur_key, "urgent")) {
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params->workspaces_walk->urgent = val;
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FREE(params->cur_key);
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return 1;
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}
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FREE(params->cur_key);
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return 0;
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}
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/*
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* Parse an integer (num or the rect)
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*
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*/
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static int workspaces_integer_cb(void *params_, long long val) {
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struct workspaces_json_params *params = (struct workspaces_json_params *)params_;
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if (!strcmp(params->cur_key, "id")) {
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params->workspaces_walk->id = val;
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FREE(params->cur_key);
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return 1;
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}
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if (!strcmp(params->cur_key, "num")) {
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params->workspaces_walk->num = (int)val;
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FREE(params->cur_key);
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return 1;
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}
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if (!strcmp(params->cur_key, "x")) {
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params->workspaces_walk->rect.x = (int)val;
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FREE(params->cur_key);
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return 1;
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}
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if (!strcmp(params->cur_key, "y")) {
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params->workspaces_walk->rect.y = (int)val;
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FREE(params->cur_key);
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return 1;
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}
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if (!strcmp(params->cur_key, "width")) {
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params->workspaces_walk->rect.w = (int)val;
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FREE(params->cur_key);
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return 1;
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}
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if (!strcmp(params->cur_key, "height")) {
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params->workspaces_walk->rect.h = (int)val;
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FREE(params->cur_key);
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return 1;
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}
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FREE(params->cur_key);
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return 0;
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}
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/*
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* Parse a string (name, output)
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*
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*/
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static int workspaces_string_cb(void *params_, const unsigned char *val, size_t len) {
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struct workspaces_json_params *params = (struct workspaces_json_params *)params_;
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if (!strcmp(params->cur_key, "name")) {
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const char *ws_name = (const char *)val;
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params->workspaces_walk->canonical_name = sstrndup(ws_name, len);
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if ((config.strip_ws_numbers || config.strip_ws_name) && params->workspaces_walk->num >= 0) {
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/* Special case: strip off the workspace number/name */
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static char ws_num[32];
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snprintf(ws_num, sizeof(ws_num), "%d", params->workspaces_walk->num);
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/* Calculate the length of the number str in the name */
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size_t offset = strspn(ws_name, ws_num);
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/* Also strip off the conventional ws name delimiter */
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if (offset && ws_name[offset] == ':')
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offset += 1;
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if (config.strip_ws_numbers) {
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/* Offset may be equal to length, in which case display the number */
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params->workspaces_walk->name = (offset < len
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? i3string_from_markup_with_length(ws_name + offset, len - offset)
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: i3string_from_markup(ws_num));
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} else {
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params->workspaces_walk->name = i3string_from_markup(ws_num);
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}
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} else {
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/* Default case: just save the name */
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params->workspaces_walk->name = i3string_from_markup_with_length(ws_name, len);
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}
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/* Save its rendered width */
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params->workspaces_walk->name_width =
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predict_text_width(params->workspaces_walk->name);
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DLOG("Got workspace canonical: %s, name: '%s', name_width: %d, glyphs: %zu\n",
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params->workspaces_walk->canonical_name,
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i3string_as_utf8(params->workspaces_walk->name),
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params->workspaces_walk->name_width,
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i3string_get_num_glyphs(params->workspaces_walk->name));
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FREE(params->cur_key);
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return 1;
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}
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if (!strcmp(params->cur_key, "output")) {
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/* We add the ws to the TAILQ of the output, it belongs to */
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char *output_name = NULL;
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sasprintf(&output_name, "%.*s", len, val);
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i3_output *target = get_output_by_name(output_name);
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if (target != NULL) {
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params->workspaces_walk->output = target;
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TAILQ_INSERT_TAIL(params->workspaces_walk->output->workspaces,
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params->workspaces_walk,
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tailq);
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}
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FREE(output_name);
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return 1;
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}
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return 0;
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}
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/*
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* We hit the start of a JSON map (rect or a new output)
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*
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*/
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static int workspaces_start_map_cb(void *params_) {
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struct workspaces_json_params *params = (struct workspaces_json_params *)params_;
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i3_ws *new_workspace = NULL;
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if (params->cur_key == NULL) {
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new_workspace = smalloc(sizeof(i3_ws));
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new_workspace->num = -1;
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new_workspace->name = NULL;
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new_workspace->visible = 0;
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new_workspace->focused = 0;
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new_workspace->urgent = 0;
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memset(&new_workspace->rect, 0, sizeof(rect));
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new_workspace->output = NULL;
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params->workspaces_walk = new_workspace;
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return 1;
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}
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return 1;
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}
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/*
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* Parse a key.
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*
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* Essentially we just save it in the parsing state
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*
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*/
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static int workspaces_map_key_cb(void *params_, const unsigned char *keyVal, size_t keyLen) {
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struct workspaces_json_params *params = (struct workspaces_json_params *)params_;
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FREE(params->cur_key);
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sasprintf(&(params->cur_key), "%.*s", keyLen, keyVal);
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return 1;
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}
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/* A datastructure to pass all these callbacks to yajl */
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static yajl_callbacks workspaces_callbacks = {
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.yajl_boolean = workspaces_boolean_cb,
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.yajl_integer = workspaces_integer_cb,
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.yajl_string = workspaces_string_cb,
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.yajl_start_map = workspaces_start_map_cb,
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.yajl_map_key = workspaces_map_key_cb,
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};
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/*
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* Start parsing the received JSON string
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*
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*/
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void parse_workspaces_json(char *json) {
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/* FIXME: Fasciliate stream processing, i.e. allow starting to interpret
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* JSON in chunks */
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struct workspaces_json_params params;
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free_workspaces();
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params.workspaces_walk = NULL;
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params.cur_key = NULL;
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params.json = json;
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yajl_handle handle;
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yajl_status state;
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handle = yajl_alloc(&workspaces_callbacks, NULL, (void *)¶ms);
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state = yajl_parse(handle, (const unsigned char *)json, strlen(json));
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/* FIXME: Proper error handling for JSON parsing */
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switch (state) {
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case yajl_status_ok:
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break;
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case yajl_status_client_canceled:
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case yajl_status_error:
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ELOG("Could not parse workspaces reply!\n");
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exit(EXIT_FAILURE);
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break;
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}
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yajl_free(handle);
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FREE(params.cur_key);
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}
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/*
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* free() all workspace data structures. Does not free() the heads of the tailqueues.
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*
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*/
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void free_workspaces(void) {
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i3_output *outputs_walk;
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if (outputs == NULL) {
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return;
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}
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i3_ws *ws_walk;
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SLIST_FOREACH (outputs_walk, outputs, slist) {
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if (outputs_walk->workspaces != NULL && !TAILQ_EMPTY(outputs_walk->workspaces)) {
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TAILQ_FOREACH (ws_walk, outputs_walk->workspaces, tailq) {
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I3STRING_FREE(ws_walk->name);
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FREE(ws_walk->canonical_name);
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}
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FREE_TAILQ(outputs_walk->workspaces, i3_ws);
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}
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}
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}
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