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Allow formats to be specified as functions (in the code) so they are

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only evaluated on demand rather than each time a format tree is
constructed. Use this for expensive formats like pane_current_command.
This commit is contained in:
nicm
2015-08-28 16:46:40 +00:00
parent 55b8d74561
commit 983ebb2689
1 changed files with 126 additions and 49 deletions
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175
format.c
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@@ -35,14 +35,23 @@
* string.
*/
struct format_entry;
typedef void (*format_cb)(struct format_tree *, struct format_entry *);
void format_job_callback(struct job *);
const char *format_job_get(struct format_tree *, const char *);
void format_job_timer(int, short, void *);
void format_cb_host(struct format_tree *, struct format_entry *);
void format_cb_host_short(struct format_tree *, struct format_entry *);
void format_cb_pid(struct format_tree *, struct format_entry *);
void format_cb_start_command(struct format_tree *, struct format_entry *);
void format_cb_current_command(struct format_tree *, struct format_entry *);
void format_add_cb(struct format_tree *, const char *, format_cb);
int format_replace(struct format_tree *, const char *, size_t, char **,
size_t *, size_t *);
char *format_time_string(time_t);
char *format_get_command(struct window_pane *);
void format_defaults_pane_tabs(struct format_tree *, struct window_pane *);
void format_defaults_session(struct format_tree *, struct session *);
@@ -79,18 +88,19 @@ format_job_cmp(struct format_job *fj1, struct format_job *fj2)
/* Entry in format tree. */
struct format_entry {
char *key;
char *value;
RB_ENTRY(format_entry) entry;
char *key;
char *value;
format_cb cb;
RB_ENTRY(format_entry) entry;
};
/* Format entry tree. */
struct format_tree {
struct window *w;
struct session *s;
struct window *w;
struct session *s;
struct window_pane *wp;
int status;
int status;
RB_HEAD(format_entry_tree, format_entry) tree;
};
@@ -257,6 +267,75 @@ format_job_timer(unused int fd, unused short events, unused void *arg)
evtimer_add(&format_job_event, &tv);
}
/* Callback for host. */
void
format_cb_host(unused struct format_tree *ft, struct format_entry *fe)
{
char host[HOST_NAME_MAX + 1];
if (gethostname(host, sizeof host) != 0)
fe->value = xstrdup("");
else
fe->value = xstrdup(host);
}
/* Callback for host_short. */
void
format_cb_host_short(unused struct format_tree *ft, struct format_entry *fe)
{
char host[HOST_NAME_MAX + 1], *cp;
if (gethostname(host, sizeof host) != 0)
fe->value = xstrdup("");
else {
if ((cp = strchr(host, '.')) != NULL)
*cp = '\0';
fe->value = xstrdup(host);
}
}
/* Callback for pid. */
void
format_cb_pid(unused struct format_tree *ft, struct format_entry *fe)
{
xasprintf(&fe->value, "%ld", (long)getpid());
}
/* Callback for pane_start_command. */
void
format_cb_start_command(struct format_tree *ft, struct format_entry *fe)
{
struct window_pane *wp = ft->wp;
if (wp == NULL)
return;
fe->value = cmd_stringify_argv(wp->argc, wp->argv);
}
/* Callback for pane_current_command. */
void
format_cb_current_command(struct format_tree *ft, struct format_entry *fe)
{
struct window_pane *wp = ft->wp;
char *cmd;
if (wp == NULL)
return;
cmd = get_proc_name(wp->fd, wp->tty);
if (cmd == NULL || *cmd == '\0') {
free(cmd);
cmd = cmd_stringify_argv(wp->argc, wp->argv);
if (cmd == NULL || *cmd == '\0') {
free(cmd);
cmd = xstrdup(wp->shell);
}
}
fe->value = parse_window_name(cmd);
free(cmd);
}
/* Create a new tree. */
struct format_tree *
format_create(void)
@@ -269,7 +348,6 @@ struct format_tree *
format_create_status(int status)
{
struct format_tree *ft;
char host[HOST_NAME_MAX + 1], *ptr;
if (!event_initialized(&format_job_event)) {
evtimer_set(&format_job_event, format_job_timer, NULL);
@@ -280,13 +358,9 @@ format_create_status(int status)
RB_INIT(&ft->tree);
ft->status = status;
if (gethostname(host, sizeof host) == 0) {
format_add(ft, "host", "%s", host);
if ((ptr = strchr(host, '.')) != NULL)
*ptr = '\0';
format_add(ft, "host_short", "%s", host);
}
format_add(ft, "pid", "%ld", (long) getpid());
format_add_cb(ft, "host", format_cb_host);
format_add_cb(ft, "host_short", format_cb_host_short);
format_add_cb(ft, "pid", format_cb_pid);
return (ft);
}
@@ -318,17 +392,42 @@ format_add(struct format_tree *ft, const char *key, const char *fmt, ...)
fe = xmalloc(sizeof *fe);
fe->key = xstrdup(key);
fe_now = RB_INSERT(format_entry_tree, &ft->tree, fe);
if (fe_now != NULL) {
free(fe->key);
free(fe);
free(fe_now->value);
fe = fe_now;
}
fe->cb = NULL;
va_start(ap, fmt);
xvasprintf(&fe->value, fmt, ap);
va_end(ap);
}
/* Add a key and function. */
void
format_add_cb(struct format_tree *ft, const char *key, format_cb cb)
{
struct format_entry *fe;
struct format_entry *fe_now;
fe = xmalloc(sizeof *fe);
fe->key = xstrdup(key);
fe_now = RB_INSERT(format_entry_tree, &ft->tree, fe);
if (fe_now != NULL) {
free(fe_now->value);
fe_now->value = fe->value;
free(fe->key);
free(fe);
free(fe_now->value);
fe = fe_now;
}
fe->cb = cb;
fe->value = NULL;
}
/* Find a format entry. */
@@ -363,8 +462,11 @@ format_find(struct format_tree *ft, const char *key)
fe_find.key = (char *) key;
fe = RB_FIND(format_entry_tree, &ft->tree, &fe_find);
if (fe != NULL)
if (fe != NULL) {
if (fe->value == NULL && fe->cb != NULL)
fe->cb(ft, fe);
return (fe->value);
}
envent = NULL;
if (ft->s != NULL)
@@ -506,7 +608,7 @@ char *
format_expand(struct format_tree *ft, const char *fmt)
{
char *buf, *tmp, *cmd;
const char *ptr, *s;
const char *ptr, *s, *saved = fmt;
size_t off, len, n, slen;
int ch, brackets;
@@ -610,29 +712,10 @@ format_expand(struct format_tree *ft, const char *fmt)
}
buf[off] = '\0';
log_debug("format '%s' -> '%s'", saved, buf);
return (buf);
}
/* Get command name for format. */
char *
format_get_command(struct window_pane *wp)
{
char *cmd, *out;
cmd = get_proc_name(wp->fd, wp->tty);
if (cmd == NULL || *cmd == '\0') {
free(cmd);
cmd = cmd_stringify_argv(wp->argc, wp->argv);
if (cmd == NULL || *cmd == '\0') {
free(cmd);
cmd = xstrdup(wp->shell);
}
}
out = parse_window_name(cmd);
free(cmd);
return (out);
}
/* Get time as a string. */
char *
format_time_string(time_t t)
@@ -863,11 +946,11 @@ format_defaults_pane(struct format_tree *ft, struct window_pane *wp)
struct grid_line *gl;
unsigned long long size;
u_int i, idx;
char *cmd;
int status;
if (ft->w == NULL)
ft->w = wp->window;
ft->wp = wp;
size = 0;
for (i = 0; i < gd->hsize; i++) {
@@ -908,14 +991,8 @@ format_defaults_pane(struct format_tree *ft, struct window_pane *wp)
format_add(ft, "pane_tty", "%s", wp->tty);
format_add(ft, "pane_pid", "%ld", (long) wp->pid);
if ((cmd = cmd_stringify_argv(wp->argc, wp->argv)) != NULL) {
format_add(ft, "pane_start_command", "%s", cmd);
free(cmd);
}
if ((cmd = format_get_command(wp)) != NULL) {
format_add(ft, "pane_current_command", "%s", cmd);
free(cmd);
}
format_add_cb(ft, "pane_start_command", format_cb_start_command);
format_add_cb(ft, "pane_current_command", format_cb_current_command);
format_add(ft, "cursor_x", "%u", wp->base.cx);
format_add(ft, "cursor_y", "%u", wp->base.cy);