273 lines
7.3 KiB
C
273 lines
7.3 KiB
C
/*
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* i3bar - an xcb-based status- and ws-bar for i3
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*
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* © 2010 Axel Wagner and contributors
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*
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* See file LICNSE for license information
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*
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* src/workspaces.c: Maintaining the workspace-lists
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*
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*/
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <yajl/yajl_parse.h>
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#include "common.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 booleant-value (visible, focused, urgent)
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*
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*/
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static int workspaces_boolean_cb(void *params_, bool 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 val) {
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struct workspaces_json_params *params = (struct workspaces_json_params*) params_;
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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, unsigned int len) {
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struct workspaces_json_params *params = (struct workspaces_json_params*) params_;
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char *output_name;
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if (!strcmp(params->cur_key, "name")) {
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/* Save the name */
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params->workspaces_walk->name = malloc(sizeof(const unsigned char) * (len + 1));
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strncpy(params->workspaces_walk->name, (const char*) val, len);
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params->workspaces_walk->name[len] = '\0';
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/* Convert the name to ucs2, save it's length in glyphs and calculate it'srendered width */
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int ucs2_len;
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xcb_char2b_t *ucs2_name = (xcb_char2b_t*) convert_utf8_to_ucs2(params->workspaces_walk->name, &ucs2_len);
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params->workspaces_walk->ucs2_name = ucs2_name;
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params->workspaces_walk->name_glyphs = ucs2_len;
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params->workspaces_walk->name_width =
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predict_text_extents(params->workspaces_walk->ucs2_name,
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params->workspaces_walk->name_glyphs);
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DLOG("Got Workspace %s, name_width: %d, glyphs: %d\n",
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params->workspaces_walk->name,
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params->workspaces_walk->name_width,
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params->workspaces_walk->name_glyphs);
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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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output_name = malloc(sizeof(const unsigned char) * (len + 1));
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strncpy(output_name, (const char*) val, len);
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output_name[len] = '\0';
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params->workspaces_walk->output = get_output_by_name(output_name);
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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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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 = malloc(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, unsigned int 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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params->cur_key = malloc(sizeof(unsigned char) * (keyLen + 1));
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if (params->cur_key == NULL) {
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ELOG("Could not allocate memory: %s\n", strerror(errno));
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exit(EXIT_FAILURE);
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}
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strncpy(params->cur_key, (const char*) keyVal, keyLen);
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params->cur_key[keyLen] = '\0';
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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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yajl_callbacks workspaces_callbacks = {
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NULL,
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&workspaces_boolean_cb,
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&workspaces_integer_cb,
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NULL,
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NULL,
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&workspaces_string_cb,
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&workspaces_start_map_cb,
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&workspaces_map_key_cb,
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NULL,
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NULL,
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NULL
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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_parser_config parse_conf = { 0, 0 };
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yajl_status state;
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handle = yajl_alloc(&workspaces_callbacks, &parse_conf, NULL, (void*) ¶ms);
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state = yajl_parse(handle, (const unsigned char*) json, strlen(json));
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/* FIXME: Propper errorhandling 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_insufficient_data:
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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() {
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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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FREE(ws_walk->name);
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FREE(ws_walk->ucs2_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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