[i3/i3] / src / cfgparse.y

%{
/*
 * vim:ts=4:sw=4:expandtab
 *
 */
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
#include <fcntl.h>

#include "all.h"

static pid_t configerror_pid = -1;

static Match current_match;
static Barconfig current_bar;
/* The pattern which was specified by the user, for example -misc-fixed-*. We
 * store this in a separate variable because in the i3 config struct we just
 * store the i3Font. */
static char *font_pattern;
/* The path to the temporary script files used by i3-nagbar. We need to keep
 * them around to delete the files in the i3-nagbar SIGCHLD handler. */
static char *edit_script_path, *pager_script_path;

typedef struct yy_buffer_state *YY_BUFFER_STATE;
extern int yylex(struct context *context);
extern int yyparse(void);
extern int yylex_destroy(void);
extern FILE *yyin;
YY_BUFFER_STATE yy_scan_string(const char *);

static struct bindings_head *current_bindings;
static struct context *context;

/* We don’t need yydebug for now, as we got decent error messages using
 * yyerror(). Should you ever want to extend the parser, it might be handy
 * to just comment it in again, so it stays here. */
//int yydebug = 1;

void yyerror(const char *error_message) {
    context->has_errors = true;

    ELOG("\n");
    ELOG("CONFIG: %s\n", error_message);
    ELOG("CONFIG: in file \"%s\", line %d:\n",
        context->filename, context->line_number);
    ELOG("CONFIG:   %s\n", context->line_copy);
    char buffer[context->last_column+1];
    buffer[context->last_column] = '\0';
    for (int c = 1; c <= context->last_column; c++)
        buffer[c-1] = (c >= context->first_column ? '^' : ' ');
    ELOG("CONFIG:   %s\n", buffer);
    ELOG("\n");
}

int yywrap(void) {
    return 1;
}

/*
 * Goes through each line of buf (separated by \n) and checks for statements /
 * commands which only occur in i3 v4 configuration files. If it finds any, it
 * returns version 4, otherwise it returns version 3.
 *
 */
static int detect_version(char *buf) {
    char *walk = buf;
    char *line = buf;
    while (*walk != '\0') {
        if (*walk != '\n') {
            walk++;
            continue;
        }

        /* check for some v4-only statements */
        if (strncasecmp(line, "bindcode", strlen("bindcode")) == 0 ||
            strncasecmp(line, "force_focus_wrapping", strlen("force_focus_wrapping")) == 0 ||
            strncasecmp(line, "# i3 config file (v4)", strlen("# i3 config file (v4)")) == 0 ||
            strncasecmp(line, "workspace_layout", strlen("workspace_layout")) == 0) {
            printf("deciding for version 4 due to this line: %.*s\n", (int)(walk-line), line);
            return 4;
        }

        /* if this is a bind statement, we can check the command */
        if (strncasecmp(line, "bind", strlen("bind")) == 0) {
            char *bind = strchr(line, ' ');
            if (bind == NULL)
                goto next;
            while ((*bind == ' ' || *bind == '\t') && *bind != '\0')
                bind++;
            if (*bind == '\0')
                goto next;
            if ((bind = strchr(bind, ' ')) == NULL)
                goto next;
            while ((*bind == ' ' || *bind == '\t') && *bind != '\0')
                bind++;
            if (*bind == '\0')
                goto next;
            if (strncasecmp(bind, "layout", strlen("layout")) == 0 ||
                strncasecmp(bind, "floating", strlen("floating")) == 0 ||
                strncasecmp(bind, "workspace", strlen("workspace")) == 0 ||
                strncasecmp(bind, "focus left", strlen("focus left")) == 0 ||
                strncasecmp(bind, "focus right", strlen("focus right")) == 0 ||
                strncasecmp(bind, "focus up", strlen("focus up")) == 0 ||
                strncasecmp(bind, "focus down", strlen("focus down")) == 0 ||
                strncasecmp(bind, "border normal", strlen("border normal")) == 0 ||
                strncasecmp(bind, "border 1pixel", strlen("border 1pixel")) == 0 ||
                strncasecmp(bind, "border borderless", strlen("border borderless")) == 0 ||
                strncasecmp(bind, "--no-startup-id", strlen("--no-startup-id")) == 0 ||
                strncasecmp(bind, "bar", strlen("bar")) == 0) {
                printf("deciding for version 4 due to this line: %.*s\n", (int)(walk-line), line);
                return 4;
            }
        }

next:
        /* advance to the next line */
        walk++;
        line = walk;
    }

    return 3;
}

/*
 * Calls i3-migrate-config-to-v4 to migrate a configuration file (input
 * buffer).
 *
 * Returns the converted config file or NULL if there was an error (for
 * example the script could not be found in $PATH or the i3 executable’s
 * directory).
 *
 */
static char *migrate_config(char *input, off_t size) {
    int writepipe[2];
    int readpipe[2];

    if (pipe(writepipe) != 0 ||
        pipe(readpipe) != 0) {
        warn("migrate_config: Could not create pipes");
        return NULL;
    }

    pid_t pid = fork();
    if (pid == -1) {
        warn("Could not fork()");
        return NULL;
    }

    /* child */
    if (pid == 0) {
        /* close writing end of writepipe, connect reading side to stdin */
        close(writepipe[1]);
        dup2(writepipe[0], 0);

        /* close reading end of readpipe, connect writing side to stdout */
        close(readpipe[0]);
        dup2(readpipe[1], 1);

        static char *argv[] = {
            NULL, /* will be replaced by the executable path */
            NULL
        };
        exec_i3_utility("i3-migrate-config-to-v4", argv);
    }

    /* parent */

    /* close reading end of the writepipe (connected to the script’s stdin) */
    close(writepipe[0]);

    /* write the whole config file to the pipe, the script will read everything
     * immediately */
    int written = 0;
    int ret;
    while (written < size) {
        if ((ret = write(writepipe[1], input + written, size - written)) < 0) {
            warn("Could not write to pipe");
            return NULL;
        }
        written += ret;
    }
    close(writepipe[1]);

    /* close writing end of the readpipe (connected to the script’s stdout) */
    close(readpipe[1]);

    /* read the script’s output */
    int conv_size = 65535;
    char *converted = malloc(conv_size);
    int read_bytes = 0;
    do {
        if (read_bytes == conv_size) {
            conv_size += 65535;
            converted = realloc(converted, conv_size);
        }
        ret = read(readpipe[0], converted + read_bytes, conv_size - read_bytes);
        if (ret == -1) {
            warn("Cannot read from pipe");
            FREE(converted);
            return NULL;
        }
        read_bytes += ret;
    } while (ret > 0);

    /* get the returncode */
    int status;
    wait(&status);
    if (!WIFEXITED(status)) {
        fprintf(stderr, "Child did not terminate normally, using old config file (will lead to broken behaviour)\n");
        return NULL;
    }

    int returncode = WEXITSTATUS(status);
    if (returncode != 0) {
        fprintf(stderr, "Migration process exit code was != 0\n");
        if (returncode == 2) {
            fprintf(stderr, "could not start the migration script\n");
            /* TODO: script was not found. tell the user to fix his system or create a v4 config */
        } else if (returncode == 1) {
            fprintf(stderr, "This already was a v4 config. Please add the following line to your config file:\n");
            fprintf(stderr, "# i3 config file (v4)\n");
            /* TODO: nag the user with a message to include a hint for i3 in his config file */
        }
        return NULL;
    }

    return converted;
}

/*
 * Handler which will be called when we get a SIGCHLD for the nagbar, meaning
 * it exited (or could not be started, depending on the exit code).
 *
 */
static void nagbar_exited(EV_P_ ev_child *watcher, int revents) {
    ev_child_stop(EV_A_ watcher);

    if (unlink(edit_script_path) != 0)
        warn("Could not delete temporary i3-nagbar script %s", edit_script_path);
    if (unlink(pager_script_path) != 0)
        warn("Could not delete temporary i3-nagbar script %s", pager_script_path);

    if (!WIFEXITED(watcher->rstatus)) {
        fprintf(stderr, "ERROR: i3-nagbar did not exit normally.\n");
        return;
    }

    int exitcode = WEXITSTATUS(watcher->rstatus);
    printf("i3-nagbar process exited with status %d\n", exitcode);
    if (exitcode == 2) {
        fprintf(stderr, "ERROR: i3-nagbar could not be found. Is it correctly installed on your system?\n");
    }

    configerror_pid = -1;
}

/* We need ev >= 4 for the following code. Since it is not *that* important (it
 * only makes sure that there are no i3-nagbar instances left behind) we still
 * support old systems with libev 3. */
#if EV_VERSION_MAJOR >= 4
/*
 * Cleanup handler. Will be called when i3 exits. Kills i3-nagbar with signal
 * SIGKILL (9) to make sure there are no left-over i3-nagbar processes.
 *
 */
static void nagbar_cleanup(EV_P_ ev_cleanup *watcher, int revent) {
    if (configerror_pid != -1) {
        LOG("Sending SIGKILL (9) to i3-nagbar with PID %d\n", configerror_pid);
        kill(configerror_pid, SIGKILL);
    }
}
#endif

/*
 * Writes the given command as a shell script to path.
 * Returns true unless something went wrong.
 *
 */
static bool write_nagbar_script(const char *path, const char *command) {
    int fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR | S_IXUSR);
    if (fd == -1) {
        warn("Could not create temporary script to store the nagbar command");
        return false;
    }
    write(fd, "#!/bin/sh\n", strlen("#!/bin/sh\n"));
    write(fd, command, strlen(command));
    close(fd);
    return true;
}

/*
 * Starts an i3-nagbar process which alerts the user that his configuration
 * file contains one or more errors. Also offers two buttons: One to launch an
 * $EDITOR on the config file and another one to launch a $PAGER on the error
 * logfile.
 *
 */
static void start_configerror_nagbar(const char *config_path) {
    if (only_check_config)
        return;

    fprintf(stderr, "Starting i3-nagbar due to configuration errors\n");

    /* We need to create a custom script containing our actual command
     * since not every terminal emulator which is contained in
     * i3-sensible-terminal supports -e with multiple arguments (and not
     * all of them support -e with one quoted argument either).
     *
     * NB: The paths need to be unique, that is, don’t assume users close
     * their nagbars at any point in time (and they still need to work).
     * */
    edit_script_path = get_process_filename("nagbar-cfgerror-edit");
    pager_script_path = get_process_filename("nagbar-cfgerror-pager");

    configerror_pid = fork();
    if (configerror_pid == -1) {
        warn("Could not fork()");
        return;
    }

    /* child */
    if (configerror_pid == 0) {
        char *edit_command, *pager_command;
        sasprintf(&edit_command, "i3-sensible-editor \"%s\" && i3-msg reload\n", config_path);
        sasprintf(&pager_command, "i3-sensible-pager \"%s\"\n", errorfilename);
        if (!write_nagbar_script(edit_script_path, edit_command) ||
            !write_nagbar_script(pager_script_path, pager_command))
            return;

        char *editaction,
             *pageraction;
        sasprintf(&editaction, "i3-sensible-terminal -e \"%s\"", edit_script_path);
        sasprintf(&pageraction, "i3-sensible-terminal -e \"%s\"", pager_script_path);
        char *argv[] = {
            NULL, /* will be replaced by the executable path */
            "-t",
            (context->has_errors ? "error" : "warning"),
            "-m",
            (context->has_errors ?
             "You have an error in your i3 config file!" :
             "Your config is outdated. Please fix the warnings to make sure everything works."),
            "-b",
            "edit config",
            editaction,
            (errorfilename ? "-b" : NULL),
            (context->has_errors ? "show errors" : "show warnings"),
            pageraction,
            NULL
        };
        exec_i3_utility("i3-nagbar", argv);
    }

    /* parent */
    /* install a child watcher */
    ev_child *child = smalloc(sizeof(ev_child));
    ev_child_init(child, &nagbar_exited, configerror_pid, 0);
    ev_child_start(main_loop, child);

/* We need ev >= 4 for the following code. Since it is not *that* important (it
 * only makes sure that there are no i3-nagbar instances left behind) we still
 * support old systems with libev 3. */
#if EV_VERSION_MAJOR >= 4
    /* install a cleanup watcher (will be called when i3 exits and i3-nagbar is
     * still running) */
    ev_cleanup *cleanup = smalloc(sizeof(ev_cleanup));
    ev_cleanup_init(cleanup, nagbar_cleanup);
    ev_cleanup_start(main_loop, cleanup);
#endif
}

/*
 * Kills the configerror i3-nagbar process, if any.
 *
 * Called when reloading/restarting.
 *
 * If wait_for_it is set (restarting), this function will waitpid(), otherwise,
 * ev is assumed to handle it (reloading).
 *
 */
void kill_configerror_nagbar(bool wait_for_it) {
    if (configerror_pid == -1)
        return;

    if (kill(configerror_pid, SIGTERM) == -1)
        warn("kill(configerror_nagbar) failed");

    if (!wait_for_it)
        return;

    /* When restarting, we don’t enter the ev main loop anymore and after the
     * exec(), our old pid is no longer watched. So, ev won’t handle SIGCHLD
     * for us and we would end up with a <defunct> process. Therefore we
     * waitpid() here. */
    waitpid(configerror_pid, NULL, 0);
}

/*
 * Checks for duplicate key bindings (the same keycode or keysym is configured
 * more than once). If a duplicate binding is found, a message is printed to
 * stderr and the has_errors variable is set to true, which will start
 * i3-nagbar.
 *
 */
static void check_for_duplicate_bindings(struct context *context) {
    Binding *bind, *current;
    TAILQ_FOREACH(current, bindings, bindings) {
        TAILQ_FOREACH(bind, bindings, bindings) {
            /* Abort when we reach the current keybinding, only check the
             * bindings before */
            if (bind == current)
                break;

            /* Check if one is using keysym while the other is using bindsym.
             * If so, skip. */
            /* XXX: It should be checked at a later place (when translating the
             * keysym to keycodes) if there are any duplicates */
            if ((bind->symbol == NULL && current->symbol != NULL) ||
                (bind->symbol != NULL && current->symbol == NULL))
                continue;

            /* If bind is NULL, current has to be NULL, too (see above).
             * If the keycodes differ, it can't be a duplicate. */
            if (bind->symbol != NULL &&
                strcasecmp(bind->symbol, current->symbol) != 0)
                continue;

            /* Check if the keycodes or modifiers are different. If so, they
             * can't be duplicate */
            if (bind->keycode != current->keycode ||
                bind->mods != current->mods)
                continue;
            context->has_errors = true;
            if (current->keycode != 0) {
                ELOG("Duplicate keybinding in config file:\n  modmask %d with keycode %d, command \"%s\"\n",
                     current->mods, current->keycode, current->command);
            } else {
                ELOG("Duplicate keybinding in config file:\n  modmask %d with keysym %s, command \"%s\"\n",
                     current->mods, current->symbol, current->command);
            }
        }
    }
}

static void migrate_i3bar_exec(struct Autostart *exec) {
    ELOG("**********************************************************************\n");
    ELOG("IGNORING exec command: %s\n", exec->command);
    ELOG("It contains \"i3bar\". Since i3 v4.1, i3bar will be automatically started\n");
    ELOG("for each 'bar' configuration block in your i3 config. Please remove the exec\n");
    ELOG("line and add the following to your i3 config:\n");
    ELOG("\n");
    ELOG("    bar {\n");
    ELOG("        status_command i3status\n");
    ELOG("    }\n");
    ELOG("**********************************************************************\n");

    /* Generate a dummy bar configuration */
    Barconfig *bar_config = scalloc(sizeof(Barconfig));
    /* The hard-coded ID is not a problem. It does not conflict with the
     * auto-generated bar IDs and having multiple hard-coded IDs is irrelevant
     * – they all just contain status_command = i3status */
    bar_config->id = sstrdup("migrate-bar");
    bar_config->status_command = sstrdup("i3status");
    TAILQ_INSERT_TAIL(&barconfigs, bar_config, configs);

    /* Trigger an i3-nagbar */
    context->has_warnings = true;
}

void parse_file(const char *f) {
    SLIST_HEAD(variables_head, Variable) variables = SLIST_HEAD_INITIALIZER(&variables);
    int fd, ret, read_bytes = 0;
    struct stat stbuf;
    char *buf;
    FILE *fstr;
    char buffer[1026], key[512], value[512];

    if ((fd = open(f, O_RDONLY)) == -1)
        die("Could not open configuration file: %s\n", strerror(errno));

    if (fstat(fd, &stbuf) == -1)
        die("Could not fstat file: %s\n", strerror(errno));

    buf = scalloc((stbuf.st_size + 1) * sizeof(char));
    while (read_bytes < stbuf.st_size) {
        if ((ret = read(fd, buf + read_bytes, (stbuf.st_size - read_bytes))) < 0)
            die("Could not read(): %s\n", strerror(errno));
        read_bytes += ret;
    }

    if (lseek(fd, 0, SEEK_SET) == (off_t)-1)
        die("Could not lseek: %s\n", strerror(errno));

    if ((fstr = fdopen(fd, "r")) == NULL)
        die("Could not fdopen: %s\n", strerror(errno));

    while (!feof(fstr)) {
        if (fgets(buffer, 1024, fstr) == NULL) {
            if (feof(fstr))
                break;
            die("Could not read configuration file\n");
        }

        /* sscanf implicitly strips whitespace. Also, we skip comments and empty lines. */
        if (sscanf(buffer, "%s %[^\n]", key, value) < 1 ||
            key[0] == '#' || strlen(key) < 3)
            continue;

        if (strcasecmp(key, "set") == 0) {
            if (value[0] != '$') {
                ELOG("Malformed variable assignment, name has to start with $\n");
                continue;
            }

            /* get key/value for this variable */
            char *v_key = value, *v_value;
            if (strstr(value, " ") == NULL && strstr(value, "\t") == NULL) {
                ELOG("Malformed variable assignment, need a value\n");
                continue;
            }

            if (!(v_value = strstr(value, " ")))
                v_value = strstr(value, "\t");

            *(v_value++) = '\0';
            while (*v_value == '\t' || *v_value == ' ')
                v_value++;

            struct Variable *new = scalloc(sizeof(struct Variable));
            new->key = sstrdup(v_key);
            new->value = sstrdup(v_value);
            SLIST_INSERT_HEAD(&variables, new, variables);
            DLOG("Got new variable %s = %s\n", v_key, v_value);
            continue;
        }
    }
    fclose(fstr);

    /* For every custom variable, see how often it occurs in the file and
     * how much extra bytes it requires when replaced. */
    struct Variable *current, *nearest;
    int extra_bytes = 0;
    /* We need to copy the buffer because we need to invalidate the
     * variables (otherwise we will count them twice, which is bad when
     * 'extra' is negative) */
    char *bufcopy = sstrdup(buf);
    SLIST_FOREACH(current, &variables, variables) {
        int extra = (strlen(current->value) - strlen(current->key));
        char *next;
        for (next = bufcopy;
             next < (bufcopy + stbuf.st_size) &&
             (next = strcasestr(next, current->key)) != NULL;
             next += strlen(current->key)) {
            *next = '_';
            extra_bytes += extra;
        }
    }
    FREE(bufcopy);

    /* Then, allocate a new buffer and copy the file over to the new one,
     * but replace occurences of our variables */
    char *walk = buf, *destwalk;
    char *new = smalloc((stbuf.st_size + extra_bytes + 1) * sizeof(char));
    destwalk = new;
    while (walk < (buf + stbuf.st_size)) {
        /* Find the next variable */
        SLIST_FOREACH(current, &variables, variables)
            current->next_match = strcasestr(walk, current->key);
        nearest = NULL;
        int distance = stbuf.st_size;
        SLIST_FOREACH(current, &variables, variables) {
            if (current->next_match == NULL)
                continue;
            if ((current->next_match - walk) < distance) {
                distance = (current->next_match - walk);
                nearest = current;
            }
        }
        if (nearest == NULL) {
            /* If there are no more variables, we just copy the rest */
            strncpy(destwalk, walk, (buf + stbuf.st_size) - walk);
            destwalk += (buf + stbuf.st_size) - walk;
            *destwalk = '\0';
            break;
        } else {
            /* Copy until the next variable, then copy its value */
            strncpy(destwalk, walk, distance);
            strncpy(destwalk + distance, nearest->value, strlen(nearest->value));
            walk += distance + strlen(nearest->key);
            destwalk += distance + strlen(nearest->value);
        }
    }

    /* analyze the string to find out whether this is an old config file (3.x)
     * or a new config file (4.x). If it’s old, we run the converter script. */
    int version = detect_version(buf);
    if (version == 3) {
        /* We need to convert this v3 configuration */
        char *converted = migrate_config(new, stbuf.st_size);
        if (converted != NULL) {
            ELOG("\n");
            ELOG("****************************************************************\n");
            ELOG("NOTE: Automatically converted configuration file from v3 to v4.\n");
            ELOG("\n");
            ELOG("Please convert your config file to v4. You can use this command:\n");
            ELOG("    mv %s %s.O\n", f, f);
            ELOG("    i3-migrate-config-to-v4 %s.O > %s\n", f, f);
            ELOG("****************************************************************\n");
            ELOG("\n");
            free(new);
            new = converted;
        } else {
            printf("\n");
            printf("**********************************************************************\n");
            printf("ERROR: Could not convert config file. Maybe i3-migrate-config-to-v4\n");
            printf("was not correctly installed on your system?\n");
            printf("**********************************************************************\n");
            printf("\n");
        }
    }

    /* now lex/parse it */
    yy_scan_string(new);

    context = scalloc(sizeof(struct context));
    context->filename = f;

    if (yyparse() != 0) {
        fprintf(stderr, "Could not parse configfile\n");
        exit(1);
    }

    check_for_duplicate_bindings(context);

    /* XXX: The following code will be removed in i3 v4.3 (three releases from
     * now, as of 2011-10-22) */
    /* Check for any exec or exec_always lines starting i3bar. We remove these
     * and add a bar block instead. Additionally, a i3-nagbar warning (not an
     * error) will be displayed so that users update their config file. */
    struct Autostart *exec, *next;
    for (exec = TAILQ_FIRST(&autostarts); exec; ) {
        next = TAILQ_NEXT(exec, autostarts);
        if (strstr(exec->command, "i3bar") != NULL) {
            migrate_i3bar_exec(exec);
            TAILQ_REMOVE(&autostarts, exec, autostarts);
        }
        exec = next;
    }

    for (exec = TAILQ_FIRST(&autostarts_always); exec; ) {
        next = TAILQ_NEXT(exec, autostarts_always);
        if (strstr(exec->command, "i3bar") != NULL) {
            migrate_i3bar_exec(exec);
            TAILQ_REMOVE(&autostarts_always, exec, autostarts_always);
        }
        exec = next;
    }

    if (context->has_errors || context->has_warnings) {
        ELOG("FYI: You are using i3 version " I3_VERSION "\n");
        if (version == 3)
            ELOG("Please convert your configfile first, then fix any remaining errors (see above).\n");
        start_configerror_nagbar(f);
    }

    yylex_destroy();
    FREE(context->line_copy);
    free(context);
    FREE(font_pattern);
    free(new);
    free(buf);

    while (!SLIST_EMPTY(&variables)) {
        current = SLIST_FIRST(&variables);
        FREE(current->key);
        FREE(current->value);
        SLIST_REMOVE_HEAD(&variables, variables);
        FREE(current);
    }
}

%}

%error-verbose
%lex-param { struct context *context }

%union {
    int number;
    char *string;
    uint32_t *single_color;
    struct Colortriple *color;
    Match *match;
    struct Binding *binding;
}

%token  <number>        NUMBER                      "<number>"
%token  <string>        WORD                        "<word>"
%token  <string>        STR                         "<string>"
%token  <string>        STR_NG                      "<string (non-greedy)>"
%token  <string>        HEXCOLOR                    "#<hex>"
%token  <string>        OUTPUT                      "<RandR output>"
%token                  TOKBINDCODE
%token                  TOKTERMINAL
%token                  TOKCOMMENT                  "<comment>"
%token                  TOKFONT                     "font"
%token                  TOKBINDSYM                  "bindsym"
%token  <number>        MODIFIER                    "<modifier>"
%token                  TOKCONTROL                  "control"
%token                  TOKSHIFT                    "shift"
%token                  TOKFLOATING_MODIFIER        "floating_modifier"
%token                  TOKFLOATING_MAXIMUM_SIZE    "floating_maximum_size"
%token                  TOKFLOATING_MINIMUM_SIZE    "floating_minimum_size"
%token  <string>        QUOTEDSTRING                "<quoted string>"
%token                  TOKWORKSPACE                "workspace"
%token                  TOKOUTPUT                   "output"
%token                  TOKASSIGN                   "assign"
%token                  TOKSET
%token                  TOKIPCSOCKET                "ipc_socket"
%token                  TOKRESTARTSTATE             "restart_state"
%token                  TOKEXEC                     "exec"
%token                  TOKEXEC_ALWAYS              "exec_always"
%token  <single_color>  TOKSINGLECOLOR
%token  <color>         TOKCOLOR
%token                  TOKARROW                    "→"
%token                  TOKMODE                     "mode"
%token                  TOK_BAR                     "bar"
%token                  TOK_ORIENTATION             "default_orientation"
%token                  TOK_HORIZ                   "horizontal"
%token                  TOK_VERT                    "vertical"
%token                  TOK_AUTO                    "auto"
%token                  TOK_WORKSPACE_LAYOUT        "workspace_layout"
%token                  TOKNEWWINDOW                "new_window"
%token                  TOKNEWFLOAT                 "new_float"
%token                  TOK_NORMAL                  "normal"
%token                  TOK_NONE                    "none"
%token                  TOK_1PIXEL                  "1pixel"
%token                  TOK_HIDE_EDGE_BORDERS       "hide_edge_borders"
%token                  TOKFOCUSFOLLOWSMOUSE        "focus_follows_mouse"
%token                  TOK_FORCE_FOCUS_WRAPPING    "force_focus_wrapping"
%token                  TOK_FORCE_XINERAMA          "force_xinerama"
%token                  TOK_FAKE_OUTPUTS            "fake_outputs"
%token                  TOK_WORKSPACE_AUTO_BAF      "workspace_auto_back_and_forth"
%token                  TOKWORKSPACEBAR             "workspace_bar"
%token                  TOK_DEFAULT                 "default"
%token                  TOK_STACKING                "stacking"
%token                  TOK_TABBED                  "tabbed"
%token  <number>        TOKSTACKLIMIT               "stack-limit"
%token                  TOK_POPUP_DURING_FULLSCREEN "popup_during_fullscreen"
%token                  TOK_IGNORE                  "ignore"
%token                  TOK_LEAVE_FULLSCREEN        "leave_fullscreen"
%token                  TOK_FOR_WINDOW              "for_window"

%token                  TOK_BAR_OUTPUT              "output (bar)"
%token                  TOK_BAR_TRAY_OUTPUT         "tray_output"
%token                  TOK_BAR_SOCKET_PATH         "socket_path"
%token                  TOK_BAR_MODE                "mode (bar)"
%token                  TOK_BAR_HIDE                "hide"
%token                  TOK_BAR_DOCK                "dock"
%token                  TOK_BAR_MODIFIER            "modifier (bar)"
%token                  TOK_BAR_CONTROL             "shift (bar)"
%token                  TOK_BAR_SHIFT               "control (bar)"
%token                  TOK_BAR_MOD1                "Mod1"
%token                  TOK_BAR_MOD2                "Mod2"
%token                  TOK_BAR_MOD3                "Mod3"
%token                  TOK_BAR_MOD4                "Mod4"
%token                  TOK_BAR_MOD5                "Mod5"
%token                  TOK_BAR_POSITION            "position"
%token                  TOK_BAR_BOTTOM              "bottom"
%token                  TOK_BAR_TOP                 "top"
%token                  TOK_BAR_STATUS_COMMAND      "status_command"
%token                  TOK_BAR_I3BAR_COMMAND       "i3bar_command"
%token                  TOK_BAR_FONT                "font (bar)"
%token                  TOK_BAR_WORKSPACE_BUTTONS   "workspace_buttons"
%token                  TOK_BAR_VERBOSE             "verbose"
%token                  TOK_BAR_COLORS              "colors"
%token                  TOK_BAR_COLOR_BACKGROUND    "background"
%token                  TOK_BAR_COLOR_STATUSLINE    "statusline"
%token                  TOK_BAR_COLOR_FOCUSED_WORKSPACE "focused_workspace"
%token                  TOK_BAR_COLOR_ACTIVE_WORKSPACE "active_workspace"
%token                  TOK_BAR_COLOR_INACTIVE_WORKSPACE "inactive_workspace"
%token                  TOK_BAR_COLOR_URGENT_WORKSPACE "urgent_workspace"
%token                  TOK_NO_STARTUP_ID           "--no-startup-id"

%token              TOK_MARK            "mark"
%token              TOK_CLASS           "class"
%token              TOK_INSTANCE        "instance"
%token              TOK_WINDOW_ROLE     "window_role"
%token              TOK_ID              "id"
%token              TOK_CON_ID          "con_id"
%token              TOK_TITLE           "title"
%token              TOK_URGENT          "urgent"

%type   <binding>       binding
%type   <binding>       bindcode
%type   <binding>       bindsym
%type   <number>        binding_modifiers
%type   <number>        binding_modifier
%type   <number>        direction
%type   <number>        layout_mode
%type   <number>        border_style
%type   <number>        new_window
%type   <number>        new_float
%type   <number>        colorpixel
%type   <number>        bool
%type   <number>        popup_setting
%type   <number>        bar_position_position
%type   <number>        bar_mode_mode
%type   <number>        bar_modifier_modifier
%type   <number>        optional_no_startup_id
%type   <string>        command
%type   <string>        word_or_number
%type   <string>        qstring_or_number
%type   <string>        optional_workspace_name
%type   <string>        workspace_name
%type   <string>        window_class

%%

lines: /* empty */
    | lines error
    | lines line
    ;

line:
    bindline
    | for_window
    | mode
    | bar
    | floating_maximum_size
    | floating_minimum_size
    | floating_modifier
    | orientation
    | workspace_layout
    | new_window
    | new_float
    | hide_edge_borders
    | focus_follows_mouse
    | force_focus_wrapping
    | force_xinerama
    | fake_outputs
    | workspace_back_and_forth
    | workspace_bar
    | workspace
    | assign
    | ipcsocket
    | restart_state
    | exec
    | exec_always
    | single_color
    | color
    | terminal
    | font
    | comment
    | popup_during_fullscreen
    ;

comment:
    TOKCOMMENT
    ;

command:
    STR
    ;

bindline:
    binding
    {
        TAILQ_INSERT_TAIL(bindings, $1, bindings);
    }
    ;

binding:
    TOKBINDCODE bindcode         { $$ = $2; }
    | TOKBINDSYM bindsym         { $$ = $2; }
    ;

bindcode:
    binding_modifiers NUMBER command
    {
        printf("\tFound keycode binding mod%d with key %d and command %s\n", $1, $2, $3);
        Binding *new = scalloc(sizeof(Binding));

        new->keycode = $2;
        new->mods = $1;
        new->command = $3;

        $$ = new;
    }
    ;

bindsym:
    binding_modifiers word_or_number command
    {
        printf("\tFound keysym binding mod%d with key %s and command %s\n", $1, $2, $3);
        Binding *new = scalloc(sizeof(Binding));

        new->symbol = $2;
        new->mods = $1;
        new->command = $3;

        $$ = new;
    }
    ;

for_window:
    TOK_FOR_WINDOW match command
    {
        if (match_is_empty(&current_match)) {
            ELOG("Match is empty, ignoring this for_window statement\n");
            break;
        }
        printf("\t should execute command %s for the criteria mentioned above\n", $3);
        Assignment *assignment = scalloc(sizeof(Assignment));
        assignment->type = A_COMMAND;
        assignment->match = current_match;
        assignment->dest.command = $3;
        TAILQ_INSERT_TAIL(&assignments, assignment, assignments);
    }
    ;

match:
    | matchstart criteria matchend
    {
        printf("match parsed\n");
    }
    ;

matchstart:
    '['
    {
        printf("start\n");
        match_init(&current_match);
    }
    ;

matchend:
    ']'
    {
        printf("match specification finished\n");
    }
    ;

criteria:
    criteria criterion
    | criterion
    ;

criterion:
    TOK_CLASS '=' STR
    {
        printf("criteria: class = %s\n", $3);
        current_match.class = regex_new($3);
        free($3);
    }
    | TOK_INSTANCE '=' STR
    {
        printf("criteria: instance = %s\n", $3);
        current_match.instance = regex_new($3);
        free($3);
    }
    | TOK_WINDOW_ROLE '=' STR
    {
        printf("criteria: window_role = %s\n", $3);
        current_match.role = regex_new($3);
        free($3);
    }
    | TOK_CON_ID '=' STR
    {
        printf("criteria: id = %s\n", $3);
        char *end;
        long parsed = strtol($3, &end, 10);
        if (parsed == LONG_MIN ||
            parsed == LONG_MAX ||
            parsed < 0 ||
            (end && *end != '\0')) {
            ELOG("Could not parse con id \"%s\"\n", $3);
        } else {
            current_match.con_id = (Con*)parsed;
            printf("id as int = %p\n", current_match.con_id);
        }
    }
    | TOK_ID '=' STR
    {
        printf("criteria: window id = %s\n", $3);
        char *end;
        long parsed = strtol($3, &end, 10);
        if (parsed == LONG_MIN ||
            parsed == LONG_MAX ||
            parsed < 0 ||
            (end && *end != '\0')) {
            ELOG("Could not parse window id \"%s\"\n", $3);
        } else {
            current_match.id = parsed;
            printf("window id as int = %d\n", current_match.id);
        }
    }
    | TOK_MARK '=' STR
    {
        printf("criteria: mark = %s\n", $3);
        current_match.mark = regex_new($3);
        free($3);
    }
    | TOK_TITLE '=' STR
    {
        printf("criteria: title = %s\n", $3);
        current_match.title = regex_new($3);
        free($3);
    }
    | TOK_URGENT '=' STR
    {
        printf("criteria: urgent = %s\n", $3);
        if (strcasecmp($3, "latest") == 0 ||
            strcasecmp($3, "newest") == 0 ||
            strcasecmp($3, "recent") == 0 ||
            strcasecmp($3, "last") == 0) {
            current_match.urgent = U_LATEST;
        } else if (strcasecmp($3, "oldest") == 0 ||
                   strcasecmp($3, "first") == 0) {
            current_match.urgent = U_OLDEST;
        }
        free($3);
    }
    ;

qstring_or_number:
    QUOTEDSTRING
    | NUMBER { sasprintf(&$$, "%d", $1); }
    ;

word_or_number:
    WORD
    | NUMBER
    {
        sasprintf(&$$, "%d", $1);
    }
    ;

mode:
    TOKMODE QUOTEDSTRING '{' modelines '}'
    {
        if (strcasecmp($2, "default") == 0) {
            printf("You cannot use the name \"default\" for your mode\n");
            exit(1);
        }
        printf("\t now in mode %s\n", $2);
        printf("\t current bindings = %p\n", current_bindings);
        Binding *binding;
        TAILQ_FOREACH(binding, current_bindings, bindings) {
            printf("got binding on mods %d, keycode %d, symbol %s, command %s\n",
                            binding->mods, binding->keycode, binding->symbol, binding->command);
        }

        struct Mode *mode = scalloc(sizeof(struct Mode));
        mode->name = $2;
        mode->bindings = current_bindings;
        current_bindings = NULL;
        SLIST_INSERT_HEAD(&modes, mode, modes);
    }
    ;


modelines:
    /* empty */
    | modelines modeline
    ;

modeline:
    comment
    | binding
    {
        if (current_bindings == NULL) {
            current_bindings = scalloc(sizeof(struct bindings_head));
            TAILQ_INIT(current_bindings);
        }

        TAILQ_INSERT_TAIL(current_bindings, $1, bindings);
    }
    ;

bar:
    TOK_BAR '{' barlines '}'
    {
        printf("\t new bar configuration finished, saving.\n");
        /* Generate a unique ID for this bar */
        current_bar.id = sstrdup("bar-XXXXXX");
        /* This works similar to mktemp in that it replaces the last six X with
         * random letters, but without the restriction that the given buffer
         * has to contain a valid path name. */
        char *x = current_bar.id + strlen("bar-");
        while (*x != '\0') {
            *(x++) = (rand() % 26) + 'a';
        }

        /* If no font was explicitly set, we use the i3 font as default */
        if (!current_bar.font && font_pattern)
            current_bar.font = sstrdup(font_pattern);

        /* Copy the current (static) structure into a dynamically allocated
         * one, then cleanup our static one. */
        Barconfig *bar_config = scalloc(sizeof(Barconfig));
        memcpy(bar_config, &current_bar, sizeof(Barconfig));
        TAILQ_INSERT_TAIL(&barconfigs, bar_config, configs);

        memset(&current_bar, '\0', sizeof(Barconfig));
    }
    ;

barlines:
    /* empty */
    | barlines barline
    ;

barline:
    comment
    | bar_status_command
    | bar_i3bar_command
    | bar_output
    | bar_tray_output
    | bar_position
    | bar_mode
    | bar_modifier
    | bar_font
    | bar_workspace_buttons
    | bar_verbose
    | bar_socket_path
    | bar_colors
    | bar_color_background
    | bar_color_statusline
    | bar_color_focused_workspace
    | bar_color_active_workspace
    | bar_color_inactive_workspace
    | bar_color_urgent_workspace
    ;

bar_status_command:
    TOK_BAR_STATUS_COMMAND STR
    {
        DLOG("should add status command %s\n", $2);
        FREE(current_bar.status_command);
        current_bar.status_command = $2;
    }
    ;

bar_i3bar_command:
    TOK_BAR_I3BAR_COMMAND STR
    {
        DLOG("should add i3bar_command %s\n", $2);
        FREE(current_bar.i3bar_command);
        current_bar.i3bar_command = $2;
    }
    ;

bar_output:
    TOK_BAR_OUTPUT STR
    {
        DLOG("bar output %s\n", $2);
        int new_outputs = current_bar.num_outputs + 1;
        current_bar.outputs = srealloc(current_bar.outputs, sizeof(char*) * new_outputs);
        current_bar.outputs[current_bar.num_outputs] = $2;
        current_bar.num_outputs = new_outputs;
    }
    ;

bar_tray_output:
    TOK_BAR_TRAY_OUTPUT STR
    {
        DLOG("tray %s\n", $2);
        FREE(current_bar.tray_output);
        current_bar.tray_output = $2;
    }
    ;

bar_position:
    TOK_BAR_POSITION bar_position_position
    {
        DLOG("position %d\n", $2);
        current_bar.position = $2;
    }
    ;

bar_position_position:
    TOK_BAR_TOP      { $$ = P_TOP; }
    | TOK_BAR_BOTTOM { $$ = P_BOTTOM; }
    ;

bar_mode:
    TOK_BAR_MODE bar_mode_mode
    {
        DLOG("mode %d\n", $2);
        current_bar.mode = $2;
    }
    ;

bar_mode_mode:
    TOK_BAR_HIDE   { $$ = M_HIDE; }
    | TOK_BAR_DOCK { $$ = M_DOCK; }
    ;

bar_modifier:
    TOK_BAR_MODIFIER bar_modifier_modifier
    {
        DLOG("modifier %d\n", $2);
        current_bar.modifier = $2;
    };

bar_modifier_modifier:
    TOK_BAR_CONTROL { $$ = M_CONTROL; }
    | TOK_BAR_SHIFT { $$ = M_SHIFT; }
    | TOK_BAR_MOD1  { $$ = M_MOD1; }
    | TOK_BAR_MOD2  { $$ = M_MOD2; }
    | TOK_BAR_MOD3  { $$ = M_MOD3; }
    | TOK_BAR_MOD4  { $$ = M_MOD4; }
    | TOK_BAR_MOD5  { $$ = M_MOD5; }
    ;

bar_font:
    TOK_BAR_FONT STR
    {
        DLOG("font %s\n", $2);
        FREE(current_bar.font);
        current_bar.font = $2;
    }
    ;

bar_workspace_buttons:
    TOK_BAR_WORKSPACE_BUTTONS bool
    {
        DLOG("workspace_buttons = %d\n", $2);
        /* We store this inverted to make the default setting right when
         * initializing the struct with zero. */
        current_bar.hide_workspace_buttons = !($2);
    }
    ;

bar_verbose:
    TOK_BAR_VERBOSE bool
    {
        DLOG("verbose = %d\n", $2);
        current_bar.verbose = $2;
    }
    ;

bar_socket_path:
    TOK_BAR_SOCKET_PATH STR
    {
        DLOG("socket_path = %s\n", $2);
        FREE(current_bar.socket_path);
        current_bar.socket_path = $2;
    }
    ;

bar_colors:
    TOK_BAR_COLORS '{' barlines '}'
    {
        /* At the moment, the TOK_BAR_COLORS token is only to make the config
         * friendlier for humans. We might change this in the future if it gets
         * more complex. */
    }
    ;

bar_color_background:
    TOK_BAR_COLOR_BACKGROUND HEXCOLOR
    {
        DLOG("background = %s\n", $2);
        current_bar.colors.background = $2;
    }
    ;

bar_color_statusline:
    TOK_BAR_COLOR_STATUSLINE HEXCOLOR
    {
        DLOG("statusline = %s\n", $2);
        current_bar.colors.statusline = $2;
    }
    ;

bar_color_focused_workspace:
    TOK_BAR_COLOR_FOCUSED_WORKSPACE HEXCOLOR HEXCOLOR
    {
        /* Old syntax: text / background */
        DLOG("focused_ws = %s, %s (old)\n", $2, $3);
        current_bar.colors.focused_workspace_bg = $3;
        current_bar.colors.focused_workspace_text = $2;
    }
    | TOK_BAR_COLOR_FOCUSED_WORKSPACE HEXCOLOR HEXCOLOR HEXCOLOR
    {
        /* New syntax: border / background / text */
        DLOG("focused_ws = %s, %s and %s\n", $2, $3, $4);
        current_bar.colors.focused_workspace_border = $2;
        current_bar.colors.focused_workspace_bg = $3;
        current_bar.colors.focused_workspace_text = $4;
    }
    ;

bar_color_active_workspace:
    TOK_BAR_COLOR_ACTIVE_WORKSPACE HEXCOLOR HEXCOLOR
    {
        /* Old syntax: text / background */
        DLOG("active_ws = %s, %s (old)\n", $2, $3);
        current_bar.colors.active_workspace_bg = $3;
        current_bar.colors.active_workspace_text = $2;
    }
    | TOK_BAR_COLOR_ACTIVE_WORKSPACE HEXCOLOR HEXCOLOR HEXCOLOR
    {
        /* New syntax: border / background / text */
        DLOG("active_ws = %s, %s and %s\n", $2, $3, $4);
        current_bar.colors.active_workspace_border = $2;
        current_bar.colors.active_workspace_bg = $3;
        current_bar.colors.active_workspace_text = $4;
    }
    ;

bar_color_inactive_workspace:
    TOK_BAR_COLOR_INACTIVE_WORKSPACE HEXCOLOR HEXCOLOR
    {
        /* Old syntax: text / background */
        DLOG("inactive_ws = %s, %s (old)\n", $2, $3);
        current_bar.colors.inactive_workspace_bg = $3;
        current_bar.colors.inactive_workspace_text = $2;
    }
    | TOK_BAR_COLOR_INACTIVE_WORKSPACE HEXCOLOR HEXCOLOR HEXCOLOR
    {
        DLOG("inactive_ws = %s, %s and %s\n", $2, $3, $4);
        current_bar.colors.inactive_workspace_border = $2;
        current_bar.colors.inactive_workspace_bg = $3;
        current_bar.colors.inactive_workspace_text = $4;
    }
    ;

bar_color_urgent_workspace:
    TOK_BAR_COLOR_URGENT_WORKSPACE HEXCOLOR HEXCOLOR
    {
        /* Old syntax: text / background */
        DLOG("urgent_ws = %s, %s (old)\n", $2, $3);
        current_bar.colors.urgent_workspace_bg = $3;
        current_bar.colors.urgent_workspace_text = $2;
    }
    | TOK_BAR_COLOR_URGENT_WORKSPACE HEXCOLOR HEXCOLOR HEXCOLOR
    {
        DLOG("urgent_ws = %s, %s and %s\n", $2, $3, $4);
        current_bar.colors.urgent_workspace_border = $2;
        current_bar.colors.urgent_workspace_bg = $3;
        current_bar.colors.urgent_workspace_text = $4;
    }
    ;

floating_maximum_size:
    TOKFLOATING_MAXIMUM_SIZE NUMBER WORD NUMBER
    {
        printf("floating_maximum_width = %d\n", $2);
        printf("floating_maximum_height = %d\n", $4);
        config.floating_maximum_width = $2;
        config.floating_maximum_height = $4;
    }
    ;

floating_minimum_size:
    TOKFLOATING_MINIMUM_SIZE NUMBER WORD NUMBER
    {
        printf("floating_minimum_width = %d\n", $2);
        printf("floating_minimum_height = %d\n", $4);
        config.floating_minimum_width = $2;
        config.floating_minimum_height = $4;
    }
    ;

floating_modifier:
    TOKFLOATING_MODIFIER binding_modifiers
    {
        DLOG("floating modifier = %d\n", $2);
        config.floating_modifier = $2;
    }
    ;

orientation:
    TOK_ORIENTATION direction
    {
        DLOG("New containers should start with split direction %d\n", $2);
        config.default_orientation = $2;
    }
    ;

direction:
    TOK_HORIZ       { $$ = HORIZ; }
    | TOK_VERT      { $$ = VERT; }
    | TOK_AUTO      { $$ = NO_ORIENTATION; }
    ;

workspace_layout:
    TOK_WORKSPACE_LAYOUT layout_mode
    {
        DLOG("new containers will be in mode %d\n", $2);
        config.default_layout = $2;

#if 0
        /* We also need to change the layout of the already existing
         * workspaces here. Workspaces may exist at this point because
         * of the other directives which are modifying workspaces
         * (setting the preferred screen or name). While the workspace
         * objects are already created, they have never been used.
         * Thus, the user very likely awaits the default container mode
         * to trigger in this case, regardless of where it is inside
         * his configuration file. */
        Workspace *ws;
        TAILQ_FOREACH(ws, workspaces, workspaces) {
                if (ws->table == NULL)
                        continue;
                switch_layout_mode(global_conn,
                                   ws->table[0][0],
                                   config.container_mode);
        }
#endif
    }
    | TOK_WORKSPACE_LAYOUT TOKSTACKLIMIT TOKSTACKLIMIT NUMBER
    {
        DLOG("stack-limit %d with val %d\n", $3, $4);
        config.container_stack_limit = $3;
        config.container_stack_limit_value = $4;

#if 0
        /* See the comment above */
        Workspace *ws;
        TAILQ_FOREACH(ws, workspaces, workspaces) {
                if (ws->table == NULL)
                        continue;
                Container *con = ws->table[0][0];
                con->stack_limit = config.container_stack_limit;
                con->stack_limit_value = config.container_stack_limit_value;
        }
#endif
    }
    ;

layout_mode:
    TOK_DEFAULT       { $$ = L_DEFAULT; }
    | TOK_STACKING    { $$ = L_STACKED; }
    | TOK_TABBED      { $$ = L_TABBED; }
    ;

new_window:
    TOKNEWWINDOW border_style
    {
        DLOG("new windows should start with border style %d\n", $2);
        config.default_border = $2;
    }
    ;

new_float:
    TOKNEWFLOAT border_style
    {
       DLOG("new floating windows should start with border style %d\n", $2);
       config.default_floating_border = $2;
    }
    ;

border_style:
    TOK_NORMAL      { $$ = BS_NORMAL; }
    | TOK_NONE      { $$ = BS_NONE; }
    | TOK_1PIXEL    { $$ = BS_1PIXEL; }
    ;

bool:
    NUMBER
    {
        $$ = ($1 == 1);
    }
    | WORD
    {
        DLOG("checking word \"%s\"\n", $1);
        $$ = (strcasecmp($1, "yes") == 0 ||
              strcasecmp($1, "true") == 0 ||
              strcasecmp($1, "on") == 0 ||
              strcasecmp($1, "enable") == 0 ||
              strcasecmp($1, "active") == 0);
    }
    ;

hide_edge_borders:
    TOK_HIDE_EDGE_BORDERS bool
    {
        DLOG("hide edge borders = %d\n", $2);
        config.hide_edge_borders = $2;
    }
    ;

focus_follows_mouse:
    TOKFOCUSFOLLOWSMOUSE bool
    {
        DLOG("focus follows mouse = %d\n", $2);
        config.disable_focus_follows_mouse = !($2);
    }
    ;

force_focus_wrapping:
    TOK_FORCE_FOCUS_WRAPPING bool
    {
        DLOG("force focus wrapping = %d\n", $2);
        config.force_focus_wrapping = $2;
    }
    ;

force_xinerama:
    TOK_FORCE_XINERAMA bool
    {
        DLOG("force xinerama = %d\n", $2);
        config.force_xinerama = $2;
    }
    ;

fake_outputs:
    TOK_FAKE_OUTPUTS STR
    {
        DLOG("fake outputs = %s\n", $2);
        config.fake_outputs = $2;
    }
    ;

workspace_back_and_forth:
    TOK_WORKSPACE_AUTO_BAF bool
    {
        DLOG("automatic workspace back-and-forth = %d\n", $2);
        config.workspace_auto_back_and_forth = $2;
    }
    ;

workspace_bar:
    TOKWORKSPACEBAR bool
    {
        DLOG("workspace bar = %d\n", $2);
        config.disable_workspace_bar = !($2);
    }
    ;

workspace:
    TOKWORKSPACE qstring_or_number TOKOUTPUT OUTPUT optional_workspace_name
    {
        char *ws_name = $2;

        if ($5 != NULL) {
            ELOG("The old (v3) syntax workspace <number> output <output> <name> is deprecated.\n");
            ELOG("Please use the new syntax: workspace \"<workspace>\" output <output>\n");
            ELOG("In your case, the following should work:\n");
            ELOG("    workspace \"%s\" output %s\n", $5, $4);
            ws_name = $5;
            context->has_warnings = true;
        }

        DLOG("Assigning workspace \"%s\" to output \"%s\"\n", ws_name, $4);
        /* Check for earlier assignments of the same workspace so that we
         * don’t have assignments of a single workspace to different
         * outputs */
        struct Workspace_Assignment *assignment;
        bool duplicate = false;
        TAILQ_FOREACH(assignment, &ws_assignments, ws_assignments) {
            if (strcasecmp(assignment->name, ws_name) == 0) {
                ELOG("You have a duplicate workspace assignment for workspace \"%s\"\n",
                     ws_name);
                assignment->output = $4;
                duplicate = true;
            }
        }
        if (!duplicate) {
            assignment = scalloc(sizeof(struct Workspace_Assignment));
            assignment->name = ws_name;
            assignment->output = $4;
            TAILQ_INSERT_TAIL(&ws_assignments, assignment, ws_assignments);
        }
    }
    | TOKWORKSPACE NUMBER workspace_name
    {
        int ws_num = $2;
        if (ws_num < 1) {
            DLOG("Invalid workspace assignment, workspace number %d out of range\n", ws_num);
        } else {
            DLOG("workspace name to: %s\n", $3);
#if 0
            if ($<string>3 != NULL) {
                    workspace_set_name(workspace_get(ws_num - 1), $<string>3);
                    free($<string>3);
            }
#endif
        }
    }
    ;

optional_workspace_name:
    /* empty */          { $$ = NULL; }
    | workspace_name     { $$ = $1; }
    ;

workspace_name:
    QUOTEDSTRING         { $$ = $1; }
    | STR                { $$ = $1; }
    | WORD               { $$ = $1; }
    ;

assign:
    TOKASSIGN window_class STR
    {
        /* This is the old, deprecated form of assignments. It’s provided for
         * compatibility in version (4.1, 4.2, 4.3) and will be removed
         * afterwards. It triggers an i3-nagbar warning starting from 4.1. */
        ELOG("You are using the old assign syntax (without criteria). "
             "Please see the User's Guide for the new syntax and fix "
             "your config file.\n");
        context->has_warnings = true;
        printf("assignment of %s to *%s*\n", $2, $3);
        char *workspace = $3;
        char *criteria = $2;

        Assignment *assignment = scalloc(sizeof(Assignment));
        Match *match = &(assignment->match);
        match_init(match);

        char *separator = NULL;
        if ((separator = strchr(criteria, '/')) != NULL) {
            *(separator++) = '\0';
            char *pattern;
            sasprintf(&pattern, "(?i)%s", separator);
            match->title = regex_new(pattern);
            free(pattern);
            printf("  title = %s\n", separator);
        }
        if (*criteria != '\0') {
            char *pattern;
            sasprintf(&pattern, "(?i)%s", criteria);
            match->class = regex_new(pattern);
            free(pattern);
            printf("  class = %s\n", criteria);
        }
        free(criteria);

        /* Compatibility with older versions: If the assignment target starts
         * with ~, we create the equivalent of:
         *
         * for_window [class="foo"] floating enable
         */
        if (*workspace == '~') {
            workspace++;
            if (*workspace == '\0') {
                /* This assignment was *only* for floating */
                assignment->type = A_COMMAND;
                assignment->dest.command = sstrdup("floating enable");
                TAILQ_INSERT_TAIL(&assignments, assignment, assignments);
                break;
            } else {
                /* Create a new assignment and continue afterwards */
                Assignment *floating = scalloc(sizeof(Assignment));
                match_copy(&(floating->match), match);
                floating->type = A_COMMAND;
                floating->dest.command = sstrdup("floating enable");
                TAILQ_INSERT_TAIL(&assignments, floating, assignments);
            }
        }

        assignment->type = A_TO_WORKSPACE;
        assignment->dest.workspace = workspace;
        TAILQ_INSERT_TAIL(&assignments, assignment, assignments);
    }
    | TOKASSIGN match STR
    {
        if (match_is_empty(&current_match)) {
            ELOG("Match is empty, ignoring this assignment\n");
            break;
        }
        printf("new assignment, using above criteria, to workspace %s\n", $3);
        Assignment *assignment = scalloc(sizeof(Assignment));
        assignment->match = current_match;
        assignment->type = A_TO_WORKSPACE;
        assignment->dest.workspace = $3;
        TAILQ_INSERT_TAIL(&assignments, assignment, assignments);
    }
    ;

window_class:
    QUOTEDSTRING
    | STR_NG
    ;

ipcsocket:
    TOKIPCSOCKET STR
    {
        config.ipc_socket_path = $2;
    }
    ;

restart_state:
    TOKRESTARTSTATE STR
    {
        config.restart_state_path = $2;
    }
    ;

exec:
    TOKEXEC optional_no_startup_id STR
    {
        struct Autostart *new = smalloc(sizeof(struct Autostart));
        new->command = $3;
        new->no_startup_id = $2;
        TAILQ_INSERT_TAIL(&autostarts, new, autostarts);
    }
    ;

exec_always:
    TOKEXEC_ALWAYS optional_no_startup_id STR
    {
        struct Autostart *new = smalloc(sizeof(struct Autostart));
        new->command = $3;
        new->no_startup_id = $2;
        TAILQ_INSERT_TAIL(&autostarts_always, new, autostarts_always);
    }
    ;

optional_no_startup_id:
    /* empty */ { $$ = false; }
    | TOK_NO_STARTUP_ID  { $$ = true; }
    ;

terminal:
    TOKTERMINAL STR
    {
        ELOG("The terminal option is DEPRECATED and has no effect. "
            "Please remove it from your configuration file.\n");
    }
    ;

font:
    TOKFONT STR
    {
        config.font = load_font($2, true);
        set_font(&config.font);
        printf("font %s\n", $2);
        FREE(font_pattern);
        font_pattern = $2;
    }
    ;

single_color:
    TOKSINGLECOLOR colorpixel
    {
        uint32_t *dest = $1;
        *dest = $2;
    }
    ;

color:
    TOKCOLOR colorpixel colorpixel colorpixel
    {
        struct Colortriple *dest = $1;

        dest->border = $2;
        dest->background = $3;
        dest->text = $4;
    }
    | TOKCOLOR colorpixel colorpixel colorpixel colorpixel
    {
        struct Colortriple *dest = $1;

        dest->border = $2;
        dest->background = $3;
        dest->text = $4;
        dest->indicator = $5;
    }
    ;

colorpixel:
    HEXCOLOR
    {
        $$ = get_colorpixel($1);
        free($1);
    }
    ;


binding_modifiers:
    /* NULL */                               { $$ = 0; }
    | binding_modifier
    | binding_modifiers '+' binding_modifier { $$ = $1 | $3; }
    | binding_modifiers '+'                  { $$ = $1; }
    ;

binding_modifier:
    MODIFIER        { $$ = $1; }
    | TOKCONTROL    { $$ = BIND_CONTROL; }
    | TOKSHIFT      { $$ = BIND_SHIFT; }
    ;

popup_during_fullscreen:
    TOK_POPUP_DURING_FULLSCREEN popup_setting
    {
        DLOG("popup_during_fullscreen setting: %d\n", $2);
        config.popup_during_fullscreen = $2;
    }
    ;

popup_setting:
    TOK_IGNORE              { $$ = PDF_IGNORE; }
    | TOK_LEAVE_FULLSCREEN  { $$ = PDF_LEAVE_FULLSCREEN; }
    ;