142 lines
3.4 KiB
C
142 lines
3.4 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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* © 2010-2012 Axel Wagner and contributors (see also: LICENSE)
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*
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* mode.c: Handle mode-event and show current binding mode in the bar
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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 <yajl/yajl_version.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 mode_json_params {
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char *json;
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char *cur_key;
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mode *mode;
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};
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/*
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* Parse a string (change)
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*
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*/
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#if YAJL_MAJOR >= 2
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static int mode_string_cb(void *params_, const unsigned char *val, size_t len) {
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#else
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static int mode_string_cb(void *params_, const unsigned char *val, unsigned int len) {
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#endif
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struct mode_json_params *params = (struct mode_json_params*) params_;
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if (!strcmp(params->cur_key, "change")) {
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/* Save the name */
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params->mode->name = i3string_from_utf8_with_length((const char *)val, len);
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/* Save its rendered width */
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params->mode->width = predict_text_width(params->mode->name);
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DLOG("Got mode change: %s\n", i3string_as_utf8(params->mode->name));
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FREE(params->cur_key);
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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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* 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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#if YAJL_MAJOR >= 2
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static int mode_map_key_cb(void *params_, const unsigned char *keyVal, size_t keyLen) {
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#else
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static int mode_map_key_cb(void *params_, const unsigned char *keyVal, unsigned int keyLen) {
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#endif
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struct mode_json_params *params = (struct mode_json_params*) params_;
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FREE(params->cur_key);
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params->cur_key = smalloc(sizeof(unsigned char) * (keyLen + 1));
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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 mode_callbacks = {
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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&mode_string_cb,
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NULL,
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&mode_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_mode_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 mode_json_params params;
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mode binding;
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params.cur_key = NULL;
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params.json = json;
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params.mode = &binding;
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yajl_handle handle;
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yajl_status state;
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#if YAJL_MAJOR < 2
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yajl_parser_config parse_conf = { 0, 0 };
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handle = yajl_alloc(&mode_callbacks, &parse_conf, NULL, (void*) ¶ms);
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#else
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handle = yajl_alloc(&mode_callbacks, NULL, (void*) ¶ms);
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#endif
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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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#if YAJL_MAJOR < 2
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case yajl_status_insufficient_data:
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#endif
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case yajl_status_error:
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ELOG("Could not parse mode-event!\n");
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exit(EXIT_FAILURE);
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break;
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}
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/* We don't want to indicate default binding mode */
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if (strcmp("default", i3string_as_utf8(params.mode->name)) == 0)
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I3STRING_FREE(params.mode->name);
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/* Set the new binding mode */
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set_current_mode(&binding);
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yajl_free(handle);
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FREE(params.cur_key);
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}
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