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, *cmd;
char *s, *name;
u_int width;
int line;
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;
}
if (*s != '-' && item->key != KEYC_UNKNOWN && item->key != KEYC_NONE) {
key = key_string_lookup_key(item->key);
xasprintf(&name, "%s#[default] #[align=right](%s)", s, key);
} else
xasprintf(&name, "%s", s);
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 (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);
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);
}
static int
menu_mode_cb(struct client *c, __unused u_int *cx, __unused u_int *cy)
{
struct menu_data *md = c->overlay_data;
if (~md->flags & MENU_NOMOUSE)
return (MODE_MOUSE_ALL);
return (0);
}
static void
menu_draw_cb(struct client *c, __unused struct screen_redraw_ctx *ctx0)
{
struct menu_data *md = c->overlay_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;
memcpy(&gc, &grid_default_cell, sizeof gc);
style_apply(&gc, c->session->curw->window->options, "mode-style");
screen_write_start(&ctx, NULL, 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, NULL, s, 0, i, menu->width + 4, px, py + i);
}
static void
menu_free_cb(struct client *c)
{
struct menu_data *md = c->overlay_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);
}
static int
menu_key_cb(struct client *c, struct key_event *event)
{
struct menu_data *md = c->overlay_data;
struct menu *menu = md->menu;
struct mouse_event *m = &event->m;
u_int i;
int count = menu->count, old = md->choice;
const char *name;
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 (MOUSE_RELEASE(m->b))
return (1);
if (md->choice != -1) {
md->choice = -1;
c->flags |= CLIENT_REDRAWOVERLAY;
}
return (0);
}
if (MOUSE_RELEASE(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) {
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_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 '\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 == '-')
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);
}
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;
u_int i;
const char *name;
if (c->tty.sx < menu->width + 4 || c->tty.sy < menu->count + 2)
return (-1);
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);
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;
server_client_set_overlay(c, 0, NULL, menu_mode_cb, menu_draw_cb,
menu_key_cb, menu_free_cb, md);
return (0);
}