tmux/menu.c

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/* $OpenBSD$ */
/*
* Copyright (c) 2019 Nicholas Marriott <nicholas.marriott@gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <stdlib.h>
#include <string.h>
#include "tmux.h"
struct menu_data {
struct cmdq_item *item;
int flags;
struct cmd_find_state fs;
struct screen s;
u_int px;
u_int py;
struct menu *menu;
int choice;
menu_choice_cb cb;
void *data;
};
void
menu_add_items(struct menu *menu, const struct menu_item *items,
struct cmdq_item *qitem, struct client *c, struct cmd_find_state *fs)
{
const struct menu_item *loop;
for (loop = items; loop->name != NULL; loop++)
menu_add_item(menu, loop, qitem, c, fs);
}
void
menu_add_item(struct menu *menu, const struct menu_item *item,
struct cmdq_item *qitem, struct client *c, struct cmd_find_state *fs)
{
struct menu_item *new_item;
const char *key = NULL, *cmd, *suffix = "";
char *s, *name;
u_int width, max_width;
int line;
size_t keylen, slen;
line = (item == NULL || item->name == NULL || *item->name == '\0');
if (line && menu->count == 0)
return;
menu->items = xreallocarray(menu->items, menu->count + 1,
sizeof *menu->items);
new_item = &menu->items[menu->count++];
memset(new_item, 0, sizeof *new_item);
if (line)
return;
if (fs != NULL)
s = format_single_from_state(qitem, item->name, c, fs);
else
s = format_single(qitem, item->name, c, NULL, NULL, NULL);
if (*s == '\0') { /* no item if empty after format expanded */
menu->count--;
return;
}
max_width = c->tty.sx - 4;
slen = strlen(s);
if (*s != '-' && item->key != KEYC_UNKNOWN && item->key != KEYC_NONE) {
key = key_string_lookup_key(item->key, 0);
keylen = strlen(key) + 3; /* 3 = space and two brackets */
/*
* Add the key if it is shorter than a quarter of the available
* space or there is space for the entire item text and the
* key.
*/
if (keylen <= max_width / 4)
max_width -= keylen;
else if (keylen >= max_width || slen >= max_width - keylen)
key = NULL;
}
if (slen > max_width) {
max_width--;
suffix = ">";
}
if (key != NULL)
xasprintf(&name, "%.*s%s#[default] #[align=right](%s)",
(int)max_width, s, suffix, key);
else
xasprintf(&name, "%.*s%s", (int)max_width, s, suffix);
new_item->name = name;
free(s);
cmd = item->command;
if (cmd != NULL) {
if (fs != NULL)
s = format_single_from_state(qitem, cmd, c, fs);
else
s = format_single(qitem, cmd, c, NULL, NULL, NULL);
} else
s = NULL;
new_item->command = s;
new_item->key = item->key;
width = format_width(new_item->name);
if (*new_item->name == '-')
width--;
if (width > menu->width)
menu->width = width;
}
struct menu *
menu_create(const char *title)
{
struct menu *menu;
menu = xcalloc(1, sizeof *menu);
menu->title = xstrdup(title);
menu->width = format_width(title);
return (menu);
}
void
menu_free(struct menu *menu)
{
u_int i;
for (i = 0; i < menu->count; i++) {
free((void *)menu->items[i].name);
free((void *)menu->items[i].command);
}
free(menu->items);
free((void *)menu->title);
free(menu);
}
struct screen *
menu_mode_cb(__unused struct client *c, void *data, __unused u_int *cx,
__unused u_int *cy)
{
struct menu_data *md = data;
return (&md->s);
}
/* Return parts of the input range which are not obstructed by the menu. */
void
menu_check_cb(__unused struct client *c, void *data, u_int px, u_int py,
u_int nx, struct overlay_ranges *r)
{
struct menu_data *md = data;
struct menu *menu = md->menu;
server_client_overlay_range(md->px, md->py, menu->width + 4,
menu->count + 2, px, py, nx, r);
}
void
menu_draw_cb(struct client *c, void *data,
__unused struct screen_redraw_ctx *rctx)
{
struct menu_data *md = data;
struct tty *tty = &c->tty;
struct screen *s = &md->s;
struct menu *menu = md->menu;
struct screen_write_ctx ctx;
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u_int i, px = md->px, py = md->py;
struct grid_cell gc;
style_apply(&gc, c->session->curw->window->options, "mode-style", NULL);
screen_write_start(&ctx, s);
screen_write_clearscreen(&ctx, 8);
screen_write_menu(&ctx, menu, md->choice, &gc);
screen_write_stop(&ctx);
for (i = 0; i < screen_size_y(&md->s); i++) {
tty_draw_line(tty, s, 0, i, menu->width + 4, px, py + i,
&grid_default_cell, NULL);
}
}
void
menu_free_cb(__unused struct client *c, void *data)
{
struct menu_data *md = data;
if (md->item != NULL)
cmdq_continue(md->item);
if (md->cb != NULL)
md->cb(md->menu, UINT_MAX, KEYC_NONE, md->data);
screen_free(&md->s);
menu_free(md->menu);
free(md);
}
int
menu_key_cb(struct client *c, void *data, struct key_event *event)
{
struct menu_data *md = data;
struct menu *menu = md->menu;
struct mouse_event *m = &event->m;
u_int i;
int count = menu->count, old = md->choice;
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const char *name = NULL;
const struct menu_item *item;
struct cmdq_state *state;
enum cmd_parse_status status;
char *error;
if (KEYC_IS_MOUSE(event->key)) {
if (md->flags & MENU_NOMOUSE) {
if (MOUSE_BUTTONS(m->b) != 0)
return (1);
return (0);
}
if (m->x < md->px ||
m->x > md->px + 4 + menu->width ||
m->y < md->py + 1 ||
m->y > md->py + 1 + count - 1) {
if (~md->flags & MENU_STAYOPEN) {
if (MOUSE_RELEASE(m->b))
return (1);
} else {
if (!MOUSE_RELEASE(m->b) &&
MOUSE_WHEEL(m->b) == 0 &&
!MOUSE_DRAG(m->b))
return (1);
}
if (md->choice != -1) {
md->choice = -1;
c->flags |= CLIENT_REDRAWOVERLAY;
}
return (0);
}
if (~md->flags & MENU_STAYOPEN) {
if (MOUSE_RELEASE(m->b))
goto chosen;
} else {
if (MOUSE_WHEEL(m->b) == 0 && !MOUSE_DRAG(m->b))
goto chosen;
}
md->choice = m->y - (md->py + 1);
if (md->choice != old)
c->flags |= CLIENT_REDRAWOVERLAY;
return (0);
}
for (i = 0; i < (u_int)count; i++) {
name = menu->items[i].name;
if (name == NULL || *name == '-')
continue;
if (event->key == menu->items[i].key) {
md->choice = i;
goto chosen;
}
}
switch (event->key & ~KEYC_MASK_FLAGS) {
case KEYC_UP:
case 'k':
if (old == -1)
old = 0;
do {
if (md->choice == -1 || md->choice == 0)
md->choice = count - 1;
else
md->choice--;
name = menu->items[md->choice].name;
} while ((name == NULL || *name == '-') && md->choice != old);
c->flags |= CLIENT_REDRAWOVERLAY;
return (0);
case KEYC_BSPACE:
if (~md->flags & MENU_TAB)
break;
return (1);
case '\011': /* Tab */
if (~md->flags & MENU_TAB)
break;
if (md->choice == count - 1)
return (1);
/* FALLTHROUGH */
case KEYC_DOWN:
case 'j':
if (old == -1)
old = 0;
do {
if (md->choice == -1 || md->choice == count - 1)
md->choice = 0;
else
md->choice++;
name = menu->items[md->choice].name;
} while ((name == NULL || *name == '-') && md->choice != old);
c->flags |= CLIENT_REDRAWOVERLAY;
return (0);
case 'g':
case KEYC_PPAGE:
case '\002': /* C-b */
if (md->choice > 5)
md->choice -= 5;
else
md->choice = 0;
while (md->choice != count && (name == NULL || *name == '-'))
md->choice++;
if (md->choice == count)
md->choice = -1;
c->flags |= CLIENT_REDRAWOVERLAY;
break;
case 'G':
case KEYC_NPAGE:
if (md->choice > count - 6)
md->choice = count - 1;
else
md->choice += 5;
while (md->choice != -1 && (name == NULL || *name == '-'))
md->choice--;
c->flags |= CLIENT_REDRAWOVERLAY;
break;
case '\006': /* C-f */
break;
case '\r':
goto chosen;
case '\033': /* Escape */
case '\003': /* C-c */
case '\007': /* C-g */
case 'q':
return (1);
}
return (0);
chosen:
if (md->choice == -1)
return (1);
item = &menu->items[md->choice];
if (item->name == NULL || *item->name == '-') {
if (md->flags & MENU_STAYOPEN)
return (0);
return (1);
}
if (md->cb != NULL) {
md->cb(md->menu, md->choice, item->key, md->data);
md->cb = NULL;
return (1);
}
if (md->item != NULL)
event = cmdq_get_event(md->item);
else
event = NULL;
state = cmdq_new_state(&md->fs, event, 0);
status = cmd_parse_and_append(item->command, NULL, c, state, &error);
if (status == CMD_PARSE_ERROR) {
cmdq_append(c, cmdq_get_error(error));
free(error);
}
cmdq_free_state(state);
return (1);
}
struct menu_data *
menu_prepare(struct menu *menu, int flags, struct cmdq_item *item, u_int px,
u_int py, struct client *c, struct cmd_find_state *fs, menu_choice_cb cb,
void *data)
{
struct menu_data *md;
u_int i;
const char *name;
if (c->tty.sx < menu->width + 4 || c->tty.sy < menu->count + 2)
return (NULL);
if (px + menu->width + 4 > c->tty.sx)
px = c->tty.sx - menu->width - 4;
if (py + menu->count + 2 > c->tty.sy)
py = c->tty.sy - menu->count - 2;
md = xcalloc(1, sizeof *md);
md->item = item;
md->flags = flags;
if (fs != NULL)
cmd_find_copy_state(&md->fs, fs);
screen_init(&md->s, menu->width + 4, menu->count + 2, 0);
if (~md->flags & MENU_NOMOUSE)
md->s.mode |= (MODE_MOUSE_ALL|MODE_MOUSE_BUTTON);
md->s.mode &= ~MODE_CURSOR;
md->px = px;
md->py = py;
md->menu = menu;
if (md->flags & MENU_NOMOUSE) {
for (i = 0; i < menu->count; i++) {
name = menu->items[i].name;
if (name != NULL && *name != '-')
break;
}
if (i != menu->count)
md->choice = i;
else
md->choice = -1;
} else
md->choice = -1;
md->cb = cb;
md->data = data;
return (md);
}
int
menu_display(struct menu *menu, int flags, struct cmdq_item *item, u_int px,
u_int py, struct client *c, struct cmd_find_state *fs, menu_choice_cb cb,
void *data)
{
struct menu_data *md;
md = menu_prepare(menu, flags, item, px, py, c, fs, cb, data);
if (md == NULL)
return (-1);
server_client_set_overlay(c, 0, NULL, menu_mode_cb, menu_draw_cb,
menu_key_cb, menu_free_cb, NULL, md);
return (0);
}