tmux/popup.c
2021-08-05 09:43:51 +00:00

501 lines
11 KiB
C

/* $OpenBSD$ */
/*
* Copyright (c) 2020 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 <sys/wait.h>
#include <paths.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "tmux.h"
struct popup_data {
struct client *c;
struct cmdq_item *item;
int flags;
struct screen s;
struct job *job;
struct input_ctx *ictx;
int status;
popup_close_cb cb;
void *arg;
/* Current position and size. */
u_int px;
u_int py;
u_int sx;
u_int sy;
/* Preferred position and size. */
u_int ppx;
u_int ppy;
u_int psx;
u_int psy;
enum { OFF, MOVE, SIZE } dragging;
u_int dx;
u_int dy;
u_int lx;
u_int ly;
u_int lb;
};
struct popup_editor {
char *path;
popup_finish_edit_cb cb;
void *arg;
};
static void
popup_redraw_cb(const struct tty_ctx *ttyctx)
{
struct popup_data *pd = ttyctx->arg;
pd->c->flags |= CLIENT_REDRAWOVERLAY;
}
static int
popup_set_client_cb(struct tty_ctx *ttyctx, struct client *c)
{
struct popup_data *pd = ttyctx->arg;
if (c != pd->c)
return (0);
if (pd->c->flags & CLIENT_REDRAWOVERLAY)
return (0);
ttyctx->bigger = 0;
ttyctx->wox = 0;
ttyctx->woy = 0;
ttyctx->wsx = c->tty.sx;
ttyctx->wsy = c->tty.sy;
ttyctx->xoff = ttyctx->rxoff = pd->px + 1;
ttyctx->yoff = ttyctx->ryoff = pd->py + 1;
return (1);
}
static void
popup_init_ctx_cb(struct screen_write_ctx *ctx, struct tty_ctx *ttyctx)
{
struct popup_data *pd = ctx->arg;
ttyctx->redraw_cb = popup_redraw_cb;
ttyctx->set_client_cb = popup_set_client_cb;
ttyctx->arg = pd;
}
static struct screen *
popup_mode_cb(struct client *c, u_int *cx, u_int *cy)
{
struct popup_data *pd = c->overlay_data;
*cx = pd->px + 1 + pd->s.cx;
*cy = pd->py + 1 + pd->s.cy;
return (&pd->s);
}
static int
popup_check_cb(struct client *c, u_int px, u_int py)
{
struct popup_data *pd = c->overlay_data;
if (px < pd->px || px > pd->px + pd->sx - 1)
return (1);
if (py < pd->py || py > pd->py + pd->sy - 1)
return (1);
return (0);
}
static void
popup_draw_cb(struct client *c, __unused struct screen_redraw_ctx *ctx0)
{
struct popup_data *pd = c->overlay_data;
struct tty *tty = &c->tty;
struct screen s;
struct screen_write_ctx ctx;
u_int i, px = pd->px, py = pd->py;
screen_init(&s, pd->sx, pd->sy, 0);
screen_write_start(&ctx, &s);
screen_write_clearscreen(&ctx, 8);
/* Skip drawing popup if the terminal is too small. */
if (pd->sx > 2 && pd->sy > 2) {
screen_write_box(&ctx, pd->sx, pd->sy);
screen_write_cursormove(&ctx, 1, 1, 0);
screen_write_fast_copy(&ctx, &pd->s, 0, 0, pd->sx - 2,
pd->sy - 2);
}
screen_write_stop(&ctx);
c->overlay_check = NULL;
for (i = 0; i < pd->sy; i++){
tty_draw_line(tty, &s, 0, i, pd->sx, px, py + i,
&grid_default_cell, NULL);
}
c->overlay_check = popup_check_cb;
}
static void
popup_free_cb(struct client *c)
{
struct popup_data *pd = c->overlay_data;
struct cmdq_item *item = pd->item;
if (pd->cb != NULL)
pd->cb(pd->status, pd->arg);
if (item != NULL) {
if (cmdq_get_client(item) != NULL &&
cmdq_get_client(item)->session == NULL)
cmdq_get_client(item)->retval = pd->status;
cmdq_continue(item);
}
server_client_unref(pd->c);
if (pd->job != NULL)
job_free(pd->job);
input_free(pd->ictx);
screen_free(&pd->s);
free(pd);
}
static void
popup_resize_cb(struct client *c)
{
struct popup_data *pd = c->overlay_data;
struct tty *tty = &c->tty;
if (pd == NULL)
return;
/* Adjust position and size. */
if (pd->psy > tty->sy)
pd->sy = tty->sy;
else
pd->sy = pd->psy;
if (pd->psx > tty->sx)
pd->sx = tty->sx;
else
pd->sx = pd->psx;
if (pd->ppy + pd->sy > tty->sy)
pd->py = tty->sy - pd->sy;
else
pd->py = pd->ppy;
if (pd->ppx + pd->sx > tty->sx)
pd->px = tty->sx - pd->sx;
else
pd->px = pd->ppx;
/* Avoid zero size screens. */
if (pd->sx > 2 && pd->sy > 2) {
screen_resize(&pd->s, pd->sx - 2, pd->sy - 2, 0);
if (pd->job != NULL)
job_resize(pd->job, pd->sx - 2, pd->sy - 2);
}
}
static void
popup_handle_drag(struct client *c, struct popup_data *pd,
struct mouse_event *m)
{
u_int px, py;
if (!MOUSE_DRAG(m->b))
pd->dragging = OFF;
else if (pd->dragging == MOVE) {
if (m->x < pd->dx)
px = 0;
else if (m->x - pd->dx + pd->sx > c->tty.sx)
px = c->tty.sx - pd->sx;
else
px = m->x - pd->dx;
if (m->y < pd->dy)
py = 0;
else if (m->y - pd->dy + pd->sy > c->tty.sy)
py = c->tty.sy - pd->sy;
else
py = m->y - pd->dy;
pd->px = px;
pd->py = py;
pd->dx = m->x - pd->px;
pd->dy = m->y - pd->py;
pd->ppx = px;
pd->ppy = py;
server_redraw_client(c);
} else if (pd->dragging == SIZE) {
if (m->x < pd->px + 3)
return;
if (m->y < pd->py + 3)
return;
pd->sx = m->x - pd->px;
pd->sy = m->y - pd->py;
pd->psx = pd->sx;
pd->psy = pd->sy;
screen_resize(&pd->s, pd->sx - 2, pd->sy - 2, 0);
if (pd->job != NULL)
job_resize(pd->job, pd->sx - 2, pd->sy - 2);
server_redraw_client(c);
}
}
static int
popup_key_cb(struct client *c, struct key_event *event)
{
struct popup_data *pd = c->overlay_data;
struct mouse_event *m = &event->m;
const char *buf;
size_t len;
if (KEYC_IS_MOUSE(event->key)) {
if (pd->dragging != OFF) {
popup_handle_drag(c, pd, m);
goto out;
}
if (m->x < pd->px ||
m->x > pd->px + pd->sx - 1 ||
m->y < pd->py ||
m->y > pd->py + pd->sy - 1) {
if (MOUSE_BUTTONS (m->b) == 1)
return (1);
return (0);
}
if ((m->b & MOUSE_MASK_META) ||
m->x == pd->px ||
m->x == pd->px + pd->sx - 1 ||
m->y == pd->py ||
m->y == pd->py + pd->sy - 1) {
if (!MOUSE_DRAG(m->b))
goto out;
if (MOUSE_BUTTONS(m->lb) == 0)
pd->dragging = MOVE;
else if (MOUSE_BUTTONS(m->lb) == 2)
pd->dragging = SIZE;
pd->dx = m->lx - pd->px;
pd->dy = m->ly - pd->py;
goto out;
}
}
if ((((pd->flags & (POPUP_CLOSEEXIT|POPUP_CLOSEEXITZERO)) == 0) ||
pd->job == NULL) &&
(event->key == '\033' || event->key == '\003'))
return (1);
if (pd->job != NULL) {
if (KEYC_IS_MOUSE(event->key)) {
/* Must be inside, checked already. */
if (!input_key_get_mouse(&pd->s, m, m->x - pd->px - 1,
m->y - pd->py - 1, &buf, &len))
return (0);
bufferevent_write(job_get_event(pd->job), buf, len);
return (0);
}
input_key(&pd->s, job_get_event(pd->job), event->key);
}
return (0);
out:
pd->lx = m->x;
pd->ly = m->y;
pd->lb = m->b;
return (0);
}
static void
popup_job_update_cb(struct job *job)
{
struct popup_data *pd = job_get_data(job);
struct evbuffer *evb = job_get_event(job)->input;
struct client *c = pd->c;
struct screen *s = &pd->s;
void *data = EVBUFFER_DATA(evb);
size_t size = EVBUFFER_LENGTH(evb);
if (size == 0)
return;
c->overlay_check = NULL;
input_parse_screen(pd->ictx, s, popup_init_ctx_cb, pd, data, size);
c->overlay_check = popup_check_cb;
evbuffer_drain(evb, size);
}
static void
popup_job_complete_cb(struct job *job)
{
struct popup_data *pd = job_get_data(job);
int status;
status = job_get_status(pd->job);
if (WIFEXITED(status))
pd->status = WEXITSTATUS(status);
else if (WIFSIGNALED(status))
pd->status = WTERMSIG(status);
else
pd->status = 0;
pd->job = NULL;
if ((pd->flags & POPUP_CLOSEEXIT) ||
((pd->flags & POPUP_CLOSEEXITZERO) && pd->status == 0))
server_client_clear_overlay(pd->c);
}
int
popup_display(int flags, struct cmdq_item *item, u_int px, u_int py, u_int sx,
u_int sy, const char *shellcmd, int argc, char **argv, const char *cwd,
struct client *c, struct session *s, popup_close_cb cb, void *arg)
{
struct popup_data *pd;
if (sx < 3 || sy < 3)
return (-1);
if (c->tty.sx < sx || c->tty.sy < sy)
return (-1);
pd = xcalloc(1, sizeof *pd);
pd->item = item;
pd->flags = flags;
pd->c = c;
pd->c->references++;
pd->cb = cb;
pd->arg = arg;
pd->status = 128 + SIGHUP;
screen_init(&pd->s, sx - 2, sy - 2, 0);
pd->px = px;
pd->py = py;
pd->sx = sx;
pd->sy = sy;
pd->ppx = px;
pd->ppy = py;
pd->psx = sx;
pd->psy = sy;
pd->job = job_run(shellcmd, argc, argv, s, cwd,
popup_job_update_cb, popup_job_complete_cb, NULL, pd,
JOB_NOWAIT|JOB_PTY|JOB_KEEPWRITE, pd->sx - 2, pd->sy - 2);
pd->ictx = input_init(NULL, job_get_event(pd->job));
server_client_set_overlay(c, 0, popup_check_cb, popup_mode_cb,
popup_draw_cb, popup_key_cb, popup_free_cb, popup_resize_cb, pd);
return (0);
}
static void
popup_editor_free(struct popup_editor *pe)
{
unlink(pe->path);
free(pe->path);
free(pe);
}
static void
popup_editor_close_cb(int status, void *arg)
{
struct popup_editor *pe = arg;
FILE *f;
char *buf = NULL;
off_t len = 0;
if (status != 0) {
pe->cb(NULL, 0, pe->arg);
popup_editor_free(pe);
return;
}
f = fopen(pe->path, "r");
if (f != NULL) {
fseeko(f, 0, SEEK_END);
len = ftello(f);
fseeko(f, 0, SEEK_SET);
if (len == 0 ||
(uintmax_t)len > (uintmax_t)SIZE_MAX ||
(buf = malloc(len)) == NULL ||
fread(buf, len, 1, f) != 1) {
free(buf);
buf = NULL;
len = 0;
}
fclose(f);
}
pe->cb(buf, len, pe->arg); /* callback now owns buffer */
popup_editor_free(pe);
}
int
popup_editor(struct client *c, const char *buf, size_t len,
popup_finish_edit_cb cb, void *arg)
{
struct popup_editor *pe;
int fd;
FILE *f;
char *cmd;
char path[] = _PATH_TMP "tmux.XXXXXXXX";
const char *editor;
u_int px, py, sx, sy;
editor = options_get_string(global_options, "editor");
if (*editor == '\0')
return (-1);
fd = mkstemp(path);
if (fd == -1)
return (-1);
f = fdopen(fd, "w");
if (fwrite(buf, len, 1, f) != 1) {
fclose(f);
return (-1);
}
fclose(f);
pe = xcalloc(1, sizeof *pe);
pe->path = xstrdup(path);
pe->cb = cb;
pe->arg = arg;
sx = c->tty.sx * 9 / 10;
sy = c->tty.sy * 9 / 10;
px = (c->tty.sx / 2) - (sx / 2);
py = (c->tty.sy / 2) - (sy / 2);
xasprintf(&cmd, "%s %s", editor, path);
if (popup_display(POPUP_CLOSEEXIT, NULL, px, py, sx, sy, cmd, 0, NULL,
_PATH_TMP, c, NULL, popup_editor_close_cb, pe) != 0) {
popup_editor_free(pe);
free(cmd);
return (-1);
}
free(cmd);
return (0);
}