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      1 /* $OpenBSD$ */
      2 
      3 /*
      4  * Copyright (c) 2020 Nicholas Marriott <nicholas.marriott (at) gmail.com>
      5  *
      6  * Permission to use, copy, modify, and distribute this software for any
      7  * purpose with or without fee is hereby granted, provided that the above
      8  * copyright notice and this permission notice appear in all copies.
      9  *
     10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     14  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
     15  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
     16  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     17  */
     18 
     19 #include <sys/types.h>
     20 #include <sys/wait.h>
     21 
     22 #include <signal.h>
     23 #include <stdlib.h>
     24 #include <string.h>
     25 #include <unistd.h>
     26 
     27 #include "tmux.h"
     28 
     29 struct popup_data {
     30 	struct client		 *c;
     31 	struct cmdq_item	 *item;
     32 	int			  flags;
     33 	char			 *title;
     34 
     35 	struct grid_cell	  border_cell;
     36 	enum box_lines		  border_lines;
     37 
     38 	struct screen		  s;
     39 	struct grid_cell	  defaults;
     40 	struct colour_palette	  palette;
     41 
     42 	struct job		 *job;
     43 	struct input_ctx	 *ictx;
     44 	int			  status;
     45 	popup_close_cb		  cb;
     46 	void			 *arg;
     47 
     48 	struct menu		 *menu;
     49 	struct menu_data	 *md;
     50 	int			  close;
     51 
     52 	/* Current position and size. */
     53 	u_int			  px;
     54 	u_int			  py;
     55 	u_int			  sx;
     56 	u_int			  sy;
     57 
     58 	/* Preferred position and size. */
     59 	u_int			  ppx;
     60 	u_int			  ppy;
     61 	u_int			  psx;
     62 	u_int			  psy;
     63 
     64 	enum { OFF, MOVE, SIZE }  dragging;
     65 	u_int			  dx;
     66 	u_int			  dy;
     67 
     68 	u_int			  lx;
     69 	u_int			  ly;
     70 	u_int			  lb;
     71 };
     72 
     73 struct popup_editor {
     74 	char			*path;
     75 	popup_finish_edit_cb	 cb;
     76 	void			*arg;
     77 };
     78 
     79 static const struct menu_item popup_menu_items[] = {
     80 	{ "Close", 'q', NULL },
     81 	{ "#{?buffer_name,Paste #[underscore]#{buffer_name},}", 'p', NULL },
     82 	{ "", KEYC_NONE, NULL },
     83 	{ "Fill Space", 'F', NULL },
     84 	{ "Centre", 'C', NULL },
     85 	{ "", KEYC_NONE, NULL },
     86 	{ "To Horizontal Pane", 'h', NULL },
     87 	{ "To Vertical Pane", 'v', NULL },
     88 
     89 	{ NULL, KEYC_NONE, NULL }
     90 };
     91 
     92 static const struct menu_item popup_internal_menu_items[] = {
     93 	{ "Close", 'q', NULL },
     94 	{ "", KEYC_NONE, NULL },
     95 	{ "Fill Space", 'F', NULL },
     96 	{ "Centre", 'C', NULL },
     97 
     98 	{ NULL, KEYC_NONE, NULL }
     99 };
    100 
    101 static void
    102 popup_redraw_cb(const struct tty_ctx *ttyctx)
    103 {
    104 	struct popup_data	*pd = ttyctx->arg;
    105 
    106 	pd->c->flags |= CLIENT_REDRAWOVERLAY;
    107 }
    108 
    109 static int
    110 popup_set_client_cb(struct tty_ctx *ttyctx, struct client *c)
    111 {
    112 	struct popup_data	*pd = ttyctx->arg;
    113 
    114 	if (c != pd->c)
    115 		return (0);
    116 	if (pd->c->flags & CLIENT_REDRAWOVERLAY)
    117 		return (0);
    118 
    119 	ttyctx->bigger = 0;
    120 	ttyctx->wox = 0;
    121 	ttyctx->woy = 0;
    122 	ttyctx->wsx = c->tty.sx;
    123 	ttyctx->wsy = c->tty.sy;
    124 
    125 	if (pd->border_lines == BOX_LINES_NONE) {
    126 		ttyctx->xoff = ttyctx->rxoff = pd->px;
    127 		ttyctx->yoff = ttyctx->ryoff = pd->py;
    128 	} else {
    129 		ttyctx->xoff = ttyctx->rxoff = pd->px + 1;
    130 		ttyctx->yoff = ttyctx->ryoff = pd->py + 1;
    131 	}
    132 
    133 	return (1);
    134 }
    135 
    136 static void
    137 popup_init_ctx_cb(struct screen_write_ctx *ctx, struct tty_ctx *ttyctx)
    138 {
    139 	struct popup_data	*pd = ctx->arg;
    140 
    141 	memcpy(&ttyctx->defaults, &pd->defaults, sizeof ttyctx->defaults);
    142 	ttyctx->palette = &pd->palette;
    143 	ttyctx->redraw_cb = popup_redraw_cb;
    144 	ttyctx->set_client_cb = popup_set_client_cb;
    145 	ttyctx->arg = pd;
    146 }
    147 
    148 static struct screen *
    149 popup_mode_cb(__unused struct client *c, void *data, u_int *cx, u_int *cy)
    150 {
    151 	struct popup_data	*pd = data;
    152 
    153 	if (pd->md != NULL)
    154 		return (menu_mode_cb(c, pd->md, cx, cy));
    155 
    156 	if (pd->border_lines == BOX_LINES_NONE) {
    157 		*cx = pd->px + pd->s.cx;
    158 		*cy = pd->py + pd->s.cy;
    159 	} else {
    160 		*cx = pd->px + 1 + pd->s.cx;
    161 		*cy = pd->py + 1 + pd->s.cy;
    162 	}
    163 	return (&pd->s);
    164 }
    165 
    166 /* Return parts of the input range which are not obstructed by the popup. */
    167 static void
    168 popup_check_cb(struct client* c, void *data, u_int px, u_int py, u_int nx,
    169     struct overlay_ranges *r)
    170 {
    171 	struct popup_data	*pd = data;
    172 	struct overlay_ranges	 or[2];
    173 	u_int			 i, j, k = 0;
    174 
    175 	if (pd->md != NULL) {
    176 		/* Check each returned range for the menu against the popup. */
    177 		menu_check_cb(c, pd->md, px, py, nx, r);
    178 		for (i = 0; i < 2; i++) {
    179 			server_client_overlay_range(pd->px, pd->py, pd->sx,
    180 			    pd->sy, r->px[i], py, r->nx[i], &or[i]);
    181 		}
    182 
    183 		/*
    184 		 * or has up to OVERLAY_MAX_RANGES non-overlapping ranges,
    185 		 * ordered from left to right. Collect them in the output.
    186 		 */
    187 		for (i = 0; i < 2; i++) {
    188 			/* Each or[i] only has 2 ranges. */
    189 			for (j = 0; j < 2; j++) {
    190 				if (or[i].nx[j] > 0) {
    191 					r->px[k] = or[i].px[j];
    192 					r->nx[k] = or[i].nx[j];
    193 					k++;
    194 				}
    195 			}
    196 		}
    197 
    198 		/* Zero remaining ranges if any. */
    199 		for (i = k; i < OVERLAY_MAX_RANGES; i++) {
    200 			r->px[i] = 0;
    201 			r->nx[i] = 0;
    202 		}
    203 
    204 		return;
    205 	}
    206 
    207 	server_client_overlay_range(pd->px, pd->py, pd->sx, pd->sy, px, py, nx,
    208 	    r);
    209 }
    210 
    211 static void
    212 popup_draw_cb(struct client *c, void *data, struct screen_redraw_ctx *rctx)
    213 {
    214 	struct popup_data	*pd = data;
    215 	struct tty		*tty = &c->tty;
    216 	struct screen		 s;
    217 	struct screen_write_ctx	 ctx;
    218 	u_int			 i, px = pd->px, py = pd->py;
    219 	struct colour_palette	*palette = &pd->palette;
    220 	struct grid_cell	 defaults;
    221 
    222 	screen_init(&s, pd->sx, pd->sy, 0);
    223 	screen_write_start(&ctx, &s);
    224 	screen_write_clearscreen(&ctx, 8);
    225 
    226 	if (pd->border_lines == BOX_LINES_NONE) {
    227 		screen_write_cursormove(&ctx, 0, 0, 0);
    228 		screen_write_fast_copy(&ctx, &pd->s, 0, 0, pd->sx, pd->sy);
    229 	} else if (pd->sx > 2 && pd->sy > 2) {
    230 		screen_write_box(&ctx, pd->sx, pd->sy, pd->border_lines,
    231 		    &pd->border_cell, pd->title);
    232 		screen_write_cursormove(&ctx, 1, 1, 0);
    233 		screen_write_fast_copy(&ctx, &pd->s, 0, 0, pd->sx - 2,
    234 		    pd->sy - 2);
    235 	}
    236 	screen_write_stop(&ctx);
    237 
    238 	memcpy(&defaults, &pd->defaults, sizeof defaults);
    239 	if (defaults.fg == 8)
    240 		defaults.fg = palette->fg;
    241 	if (defaults.bg == 8)
    242 		defaults.bg = palette->bg;
    243 
    244 	if (pd->md != NULL) {
    245 		c->overlay_check = menu_check_cb;
    246 		c->overlay_data = pd->md;
    247 	} else {
    248 		c->overlay_check = NULL;
    249 		c->overlay_data = NULL;
    250 	}
    251 	for (i = 0; i < pd->sy; i++) {
    252 		tty_draw_line(tty, &s, 0, i, pd->sx, px, py + i, &defaults,
    253 		    palette);
    254 	}
    255 	screen_free(&s);
    256 	if (pd->md != NULL) {
    257 		c->overlay_check = NULL;
    258 		c->overlay_data = NULL;
    259 		menu_draw_cb(c, pd->md, rctx);
    260 	}
    261 	c->overlay_check = popup_check_cb;
    262 	c->overlay_data = pd;
    263 }
    264 
    265 static void
    266 popup_free_cb(struct client *c, void *data)
    267 {
    268 	struct popup_data	*pd = data;
    269 	struct cmdq_item	*item = pd->item;
    270 
    271 	if (pd->md != NULL)
    272 		menu_free_cb(c, pd->md);
    273 
    274 	if (pd->cb != NULL)
    275 		pd->cb(pd->status, pd->arg);
    276 
    277 	if (item != NULL) {
    278 		if (cmdq_get_client(item) != NULL &&
    279 		    cmdq_get_client(item)->session == NULL)
    280 			cmdq_get_client(item)->retval = pd->status;
    281 		cmdq_continue(item);
    282 	}
    283 	server_client_unref(pd->c);
    284 
    285 	if (pd->job != NULL)
    286 		job_free(pd->job);
    287 	input_free(pd->ictx);
    288 
    289 	screen_free(&pd->s);
    290 	colour_palette_free(&pd->palette);
    291 
    292 	free(pd->title);
    293 	free(pd);
    294 }
    295 
    296 static void
    297 popup_resize_cb(__unused struct client *c, void *data)
    298 {
    299 	struct popup_data	*pd = data;
    300 	struct tty		*tty = &c->tty;
    301 
    302 	if (pd == NULL)
    303 		return;
    304 	if (pd->md != NULL)
    305 		menu_free_cb(c, pd->md);
    306 
    307 	/* Adjust position and size. */
    308 	if (pd->psy > tty->sy)
    309 		pd->sy = tty->sy;
    310 	else
    311 		pd->sy = pd->psy;
    312 	if (pd->psx > tty->sx)
    313 		pd->sx = tty->sx;
    314 	else
    315 		pd->sx = pd->psx;
    316 	if (pd->ppy + pd->sy > tty->sy)
    317 		pd->py = tty->sy - pd->sy;
    318 	else
    319 		pd->py = pd->ppy;
    320 	if (pd->ppx + pd->sx > tty->sx)
    321 		pd->px = tty->sx - pd->sx;
    322 	else
    323 		pd->px = pd->ppx;
    324 
    325 	/* Avoid zero size screens. */
    326 	if (pd->border_lines == BOX_LINES_NONE) {
    327 		screen_resize(&pd->s, pd->sx, pd->sy, 0);
    328 		if (pd->job != NULL)
    329 			job_resize(pd->job, pd->sx, pd->sy );
    330 	} else if (pd->sx > 2 && pd->sy > 2) {
    331 		screen_resize(&pd->s, pd->sx - 2, pd->sy - 2, 0);
    332 		if (pd->job != NULL)
    333 			job_resize(pd->job, pd->sx - 2, pd->sy - 2);
    334 	}
    335 }
    336 
    337 static void
    338 popup_make_pane(struct popup_data *pd, enum layout_type type)
    339 {
    340 	struct client		*c = pd->c;
    341 	struct session		*s = c->session;
    342 	struct window		*w = s->curw->window;
    343 	struct layout_cell	*lc;
    344 	struct window_pane	*wp = w->active, *new_wp;
    345 	u_int			 hlimit;
    346 	const char		*shell;
    347 
    348 	window_unzoom(w, 1);
    349 
    350 	lc = layout_split_pane(wp, type, -1, 0);
    351 	if (lc == NULL)
    352 		return;
    353 	hlimit = options_get_number(s->options, "history-limit");
    354 	new_wp = window_add_pane(wp->window, NULL, hlimit, 0);
    355 	layout_assign_pane(lc, new_wp, 0);
    356 
    357 	if (pd->job != NULL) {
    358 		new_wp->fd = job_transfer(pd->job, &new_wp->pid, new_wp->tty,
    359 		    sizeof new_wp->tty);
    360 		pd->job = NULL;
    361 	}
    362 
    363 	screen_set_title(&pd->s, new_wp->base.title);
    364 	screen_free(&new_wp->base);
    365 	memcpy(&new_wp->base, &pd->s, sizeof wp->base);
    366 	screen_resize(&new_wp->base, new_wp->sx, new_wp->sy, 1);
    367 	screen_init(&pd->s, 1, 1, 0);
    368 
    369 	shell = options_get_string(s->options, "default-shell");
    370 	if (!checkshell(shell))
    371 		shell = _PATH_BSHELL;
    372 	new_wp->shell = xstrdup(shell);
    373 
    374 	window_pane_set_event(new_wp);
    375 	window_set_active_pane(w, new_wp, 1);
    376 	new_wp->flags |= PANE_CHANGED;
    377 
    378 	pd->close = 1;
    379 }
    380 
    381 static void
    382 popup_menu_done(__unused struct menu *menu, __unused u_int choice,
    383     key_code key, void *data)
    384 {
    385 	struct popup_data	*pd = data;
    386 	struct client		*c = pd->c;
    387 	struct paste_buffer	*pb;
    388 	const char		*buf;
    389 	size_t			 len;
    390 
    391 	pd->md = NULL;
    392 	pd->menu = NULL;
    393 	server_redraw_client(pd->c);
    394 
    395 	switch (key) {
    396 	case 'p':
    397 		pb = paste_get_top(NULL);
    398 		if (pb != NULL) {
    399 			buf = paste_buffer_data(pb, &len);
    400 			bufferevent_write(job_get_event(pd->job), buf, len);
    401 		}
    402 		break;
    403 	case 'F':
    404 		pd->sx = c->tty.sx;
    405 		pd->sy = c->tty.sy;
    406 		pd->px = 0;
    407 		pd->py = 0;
    408 		server_redraw_client(c);
    409 		break;
    410 	case 'C':
    411 		pd->px = c->tty.sx / 2 - pd->sx / 2;
    412 		pd->py = c->tty.sy / 2 - pd->sy / 2;
    413 		server_redraw_client(c);
    414 		break;
    415 	case 'h':
    416 		popup_make_pane(pd, LAYOUT_LEFTRIGHT);
    417 		break;
    418 	case 'v':
    419 		popup_make_pane(pd, LAYOUT_TOPBOTTOM);
    420 		break;
    421 	case 'q':
    422 		pd->close = 1;
    423 		break;
    424 	}
    425 }
    426 
    427 static void
    428 popup_handle_drag(struct client *c, struct popup_data *pd,
    429     struct mouse_event *m)
    430 {
    431 	u_int	px, py;
    432 
    433 	if (!MOUSE_DRAG(m->b))
    434 		pd->dragging = OFF;
    435 	else if (pd->dragging == MOVE) {
    436 		if (m->x < pd->dx)
    437 			px = 0;
    438 		else if (m->x - pd->dx + pd->sx > c->tty.sx)
    439 			px = c->tty.sx - pd->sx;
    440 		else
    441 			px = m->x - pd->dx;
    442 		if (m->y < pd->dy)
    443 			py = 0;
    444 		else if (m->y - pd->dy + pd->sy > c->tty.sy)
    445 			py = c->tty.sy - pd->sy;
    446 		else
    447 			py = m->y - pd->dy;
    448 		pd->px = px;
    449 		pd->py = py;
    450 		pd->dx = m->x - pd->px;
    451 		pd->dy = m->y - pd->py;
    452 		pd->ppx = px;
    453 		pd->ppy = py;
    454 		server_redraw_client(c);
    455 	} else if (pd->dragging == SIZE) {
    456 		if (pd->border_lines == BOX_LINES_NONE) {
    457 			if (m->x < pd->px + 1)
    458 				return;
    459 			if (m->y < pd->py + 1)
    460 				return;
    461 		} else {
    462 			if (m->x < pd->px + 3)
    463 				return;
    464 			if (m->y < pd->py + 3)
    465 				return;
    466 		}
    467 		pd->sx = m->x - pd->px;
    468 		pd->sy = m->y - pd->py;
    469 		pd->psx = pd->sx;
    470 		pd->psy = pd->sy;
    471 
    472 		if (pd->border_lines == BOX_LINES_NONE) {
    473 			screen_resize(&pd->s, pd->sx, pd->sy, 0);
    474 			if (pd->job != NULL)
    475 				job_resize(pd->job, pd->sx, pd->sy);
    476 		} else {
    477 			screen_resize(&pd->s, pd->sx - 2, pd->sy - 2, 0);
    478 			if (pd->job != NULL)
    479 				job_resize(pd->job, pd->sx - 2, pd->sy - 2);
    480 		}
    481 		server_redraw_client(c);
    482 	}
    483 }
    484 
    485 static int
    486 popup_key_cb(struct client *c, void *data, struct key_event *event)
    487 {
    488 	struct popup_data	*pd = data;
    489 	struct mouse_event	*m = &event->m;
    490 	const char		*buf;
    491 	size_t			 len;
    492 	u_int			 px, py, x;
    493 	enum { NONE, LEFT, RIGHT, TOP, BOTTOM } border = NONE;
    494 
    495 	if (pd->md != NULL) {
    496 		if (menu_key_cb(c, pd->md, event) == 1) {
    497 			pd->md = NULL;
    498 			pd->menu = NULL;
    499 			if (pd->close)
    500 				server_client_clear_overlay(c);
    501 			else
    502 				server_redraw_client(c);
    503 		}
    504 		return (0);
    505 	}
    506 
    507 	if (KEYC_IS_MOUSE(event->key)) {
    508 		if (pd->dragging != OFF) {
    509 			popup_handle_drag(c, pd, m);
    510 			goto out;
    511 		}
    512 		if (m->x < pd->px ||
    513 		    m->x > pd->px + pd->sx - 1 ||
    514 		    m->y < pd->py ||
    515 		    m->y > pd->py + pd->sy - 1) {
    516 			if (MOUSE_BUTTONS(m->b) == MOUSE_BUTTON_3)
    517 				goto menu;
    518 			return (0);
    519 		}
    520 		if (pd->border_lines != BOX_LINES_NONE) {
    521 			if (m->x == pd->px)
    522 				border = LEFT;
    523 			else if (m->x == pd->px + pd->sx - 1)
    524 				border = RIGHT;
    525 			else if (m->y == pd->py)
    526 				border = TOP;
    527 			else if (m->y == pd->py + pd->sy - 1)
    528 				border = BOTTOM;
    529 		}
    530 		if ((m->b & MOUSE_MASK_MODIFIERS) == 0 &&
    531 		    MOUSE_BUTTONS(m->b) == MOUSE_BUTTON_3 &&
    532 		    (border == LEFT || border == TOP))
    533 		    goto menu;
    534 		if (((m->b & MOUSE_MASK_MODIFIERS) == MOUSE_MASK_META) ||
    535 		    (border != NONE && !MOUSE_DRAG(m->lb))) {
    536 			if (!MOUSE_DRAG(m->b))
    537 				goto out;
    538 			if (MOUSE_BUTTONS(m->lb) == MOUSE_BUTTON_1)
    539 				pd->dragging = MOVE;
    540 			else if (MOUSE_BUTTONS(m->lb) == MOUSE_BUTTON_3)
    541 				pd->dragging = SIZE;
    542 			pd->dx = m->lx - pd->px;
    543 			pd->dy = m->ly - pd->py;
    544 			goto out;
    545 		}
    546 	}
    547 	if ((((pd->flags & (POPUP_CLOSEEXIT|POPUP_CLOSEEXITZERO)) == 0) ||
    548 	    pd->job == NULL) &&
    549 	    (event->key == '\033' || event->key == ('c'|KEYC_CTRL)))
    550 		return (1);
    551 	if (pd->job == NULL && (pd->flags & POPUP_CLOSEANYKEY) &&
    552             !KEYC_IS_MOUSE(event->key) && !KEYC_IS_PASTE(event->key))
    553 		return (1);
    554 	if (pd->job != NULL) {
    555 		if (KEYC_IS_MOUSE(event->key)) {
    556 			/* Must be inside, checked already. */
    557 			if (pd->border_lines == BOX_LINES_NONE) {
    558 				px = m->x - pd->px;
    559 				py = m->y - pd->py;
    560 			} else {
    561 				px = m->x - pd->px - 1;
    562 				py = m->y - pd->py - 1;
    563 			}
    564 			if (!input_key_get_mouse(&pd->s, m, px, py, &buf, &len))
    565 				return (0);
    566 			bufferevent_write(job_get_event(pd->job), buf, len);
    567 			return (0);
    568 		}
    569 		input_key(&pd->s, job_get_event(pd->job), event->key);
    570 	}
    571 	return (0);
    572 
    573 menu:
    574 	pd->menu = menu_create("");
    575 	if (pd->flags & POPUP_INTERNAL) {
    576 		menu_add_items(pd->menu, popup_internal_menu_items, NULL, c,
    577 		    NULL);
    578 	} else
    579 		menu_add_items(pd->menu, popup_menu_items, NULL, c, NULL);
    580 	if (m->x >= (pd->menu->width + 4) / 2)
    581 		x = m->x - (pd->menu->width + 4) / 2;
    582 	else
    583 		x = 0;
    584 	pd->md = menu_prepare(pd->menu, 0, 0, NULL, x, m->y, c,
    585 	    BOX_LINES_DEFAULT, NULL, NULL, NULL, NULL, popup_menu_done, pd);
    586 	c->flags |= CLIENT_REDRAWOVERLAY;
    587 
    588 out:
    589 	pd->lx = m->x;
    590 	pd->ly = m->y;
    591 	pd->lb = m->b;
    592 	return (0);
    593 }
    594 
    595 static void
    596 popup_job_update_cb(struct job *job)
    597 {
    598 	struct popup_data	*pd = job_get_data(job);
    599 	struct evbuffer		*evb = job_get_event(job)->input;
    600 	struct client		*c = pd->c;
    601 	struct screen		*s = &pd->s;
    602 	void			*data = EVBUFFER_DATA(evb);
    603 	size_t			 size = EVBUFFER_LENGTH(evb);
    604 
    605 	if (size == 0)
    606 		return;
    607 
    608 	if (pd->md != NULL) {
    609 		c->overlay_check = menu_check_cb;
    610 		c->overlay_data = pd->md;
    611 	} else {
    612 		c->overlay_check = NULL;
    613 		c->overlay_data = NULL;
    614 	}
    615 	input_parse_screen(pd->ictx, s, popup_init_ctx_cb, pd, data, size);
    616 	c->overlay_check = popup_check_cb;
    617 	c->overlay_data = pd;
    618 
    619 	evbuffer_drain(evb, size);
    620 }
    621 
    622 static void
    623 popup_job_complete_cb(struct job *job)
    624 {
    625 	struct popup_data	*pd = job_get_data(job);
    626 	int			 status;
    627 
    628 	status = job_get_status(pd->job);
    629 	if (WIFEXITED(status))
    630 		pd->status = WEXITSTATUS(status);
    631 	else if (WIFSIGNALED(status))
    632 		pd->status = WTERMSIG(status);
    633 	else
    634 		pd->status = 0;
    635 	pd->job = NULL;
    636 
    637 	if ((pd->flags & POPUP_CLOSEEXIT) ||
    638 	    ((pd->flags & POPUP_CLOSEEXITZERO) && pd->status == 0))
    639 		server_client_clear_overlay(pd->c);
    640 }
    641 
    642 int
    643 popup_present(struct client *c)
    644 {
    645 	return (c->overlay_draw == popup_draw_cb);
    646 }
    647 
    648 int
    649 popup_modify(struct client *c, const char *title, const char *style,
    650 	const char *border_style, enum box_lines lines, int flags)
    651 {
    652 	struct popup_data		*pd = c->overlay_data;
    653 	struct style		sytmp;
    654 
    655 	if (title != NULL) {
    656 		if (pd->title != NULL)
    657 			free(pd->title);
    658 		pd->title = xstrdup(title);
    659 	}
    660 	if (border_style != NULL) {
    661 		style_set(&sytmp, &pd->border_cell);
    662 		if (style_parse(&sytmp, &pd->border_cell, border_style) == 0) {
    663 			pd->border_cell.fg = sytmp.gc.fg;
    664 			pd->border_cell.bg = sytmp.gc.bg;
    665 		}
    666 	}
    667 	if (style != NULL) {
    668 		style_set(&sytmp, &pd->defaults);
    669 		if (style_parse(&sytmp, &pd->defaults, style) == 0) {
    670 			pd->defaults.fg = sytmp.gc.fg;
    671 			pd->defaults.bg = sytmp.gc.bg;
    672 		}
    673 	}
    674 	if (lines != BOX_LINES_DEFAULT) {
    675 		if (lines == BOX_LINES_NONE && pd->border_lines != lines) {
    676 			screen_resize(&pd->s, pd->sx, pd->sy, 1);
    677 			job_resize(pd->job, pd->sx, pd->sy);
    678 		} else if (pd->border_lines == BOX_LINES_NONE && pd->border_lines != lines) {
    679 			screen_resize(&pd->s, pd->sx - 2, pd->sy - 2, 1);
    680 			job_resize(pd->job, pd->sx - 2, pd->sy - 2);
    681 		}
    682 		pd->border_lines = lines;
    683 		tty_resize(&c->tty);
    684 	}
    685 	if (flags != -1)
    686 		pd->flags = flags;
    687 
    688 	server_redraw_client(c);
    689 	return (0);
    690 }
    691 
    692 int
    693 popup_display(int flags, enum box_lines lines, struct cmdq_item *item, u_int px,
    694     u_int py, u_int sx, u_int sy, struct environ *env, const char *shellcmd,
    695     int argc, char **argv, const char *cwd, const char *title, struct client *c,
    696     struct session *s, const char *style, const char *border_style,
    697     popup_close_cb cb, void *arg)
    698 {
    699 	struct popup_data	*pd;
    700 	u_int			 jx, jy;
    701 	struct options		*o;
    702 	struct style		 sytmp;
    703 
    704 	if (s != NULL)
    705 		o = s->curw->window->options;
    706 	else
    707 		o = c->session->curw->window->options;
    708 
    709 	if (lines == BOX_LINES_DEFAULT)
    710 		lines = options_get_number(o, "popup-border-lines");
    711 	if (lines == BOX_LINES_NONE) {
    712 		if (sx < 1 || sy < 1)
    713 			return (-1);
    714 		jx = sx;
    715 		jy = sy;
    716 	} else {
    717 		if (sx < 3 || sy < 3)
    718 			return (-1);
    719 		jx = sx - 2;
    720 		jy = sy - 2;
    721 	}
    722 	if (c->tty.sx < sx || c->tty.sy < sy)
    723 		return (-1);
    724 
    725 	pd = xcalloc(1, sizeof *pd);
    726 	pd->item = item;
    727 	pd->flags = flags;
    728 	if (title != NULL)
    729 		pd->title = xstrdup(title);
    730 
    731 	pd->c = c;
    732 	pd->c->references++;
    733 
    734 	pd->cb = cb;
    735 	pd->arg = arg;
    736 	pd->status = 128 + SIGHUP;
    737 
    738 	pd->border_lines = lines;
    739 	memcpy(&pd->border_cell, &grid_default_cell, sizeof pd->border_cell);
    740 	style_apply(&pd->border_cell, o, "popup-border-style", NULL);
    741 	if (border_style != NULL) {
    742 		style_set(&sytmp, &grid_default_cell);
    743 		if (style_parse(&sytmp, &pd->border_cell, border_style) == 0) {
    744 			pd->border_cell.fg = sytmp.gc.fg;
    745 			pd->border_cell.bg = sytmp.gc.bg;
    746 		}
    747 	}
    748 	pd->border_cell.attr = 0;
    749 
    750 	screen_init(&pd->s, jx, jy, 0);
    751 	screen_set_default_cursor(&pd->s, global_w_options);
    752 	colour_palette_init(&pd->palette);
    753 	colour_palette_from_option(&pd->palette, global_w_options);
    754 
    755 	memcpy(&pd->defaults, &grid_default_cell, sizeof pd->defaults);
    756 	style_apply(&pd->defaults, o, "popup-style", NULL);
    757 	if (style != NULL) {
    758 		style_set(&sytmp, &grid_default_cell);
    759 		if (style_parse(&sytmp, &pd->defaults, style) == 0) {
    760 			pd->defaults.fg = sytmp.gc.fg;
    761 			pd->defaults.bg = sytmp.gc.bg;
    762 		}
    763 	}
    764 	pd->defaults.attr = 0;
    765 
    766 	pd->px = px;
    767 	pd->py = py;
    768 	pd->sx = sx;
    769 	pd->sy = sy;
    770 
    771 	pd->ppx = px;
    772 	pd->ppy = py;
    773 	pd->psx = sx;
    774 	pd->psy = sy;
    775 
    776 	pd->job = job_run(shellcmd, argc, argv, env, s, cwd,
    777 	    popup_job_update_cb, popup_job_complete_cb, NULL, pd,
    778 	    JOB_NOWAIT|JOB_PTY|JOB_KEEPWRITE|JOB_DEFAULTSHELL, jx, jy);
    779 	pd->ictx = input_init(NULL, job_get_event(pd->job), &pd->palette);
    780 
    781 	server_client_set_overlay(c, 0, popup_check_cb, popup_mode_cb,
    782 	    popup_draw_cb, popup_key_cb, popup_free_cb, popup_resize_cb, pd);
    783 	return (0);
    784 }
    785 
    786 static void
    787 popup_editor_free(struct popup_editor *pe)
    788 {
    789 	unlink(pe->path);
    790 	free(pe->path);
    791 	free(pe);
    792 }
    793 
    794 static void
    795 popup_editor_close_cb(int status, void *arg)
    796 {
    797 	struct popup_editor	*pe = arg;
    798 	FILE			*f;
    799 	char			*buf = NULL;
    800 	off_t			 len = 0;
    801 
    802 	if (status != 0) {
    803 		pe->cb(NULL, 0, pe->arg);
    804 		popup_editor_free(pe);
    805 		return;
    806 	}
    807 
    808 	f = fopen(pe->path, "r");
    809 	if (f != NULL) {
    810 		fseeko(f, 0, SEEK_END);
    811 		len = ftello(f);
    812 		fseeko(f, 0, SEEK_SET);
    813 
    814 		if (len == 0 ||
    815 		    (uintmax_t)len > (uintmax_t)SIZE_MAX ||
    816 		    (buf = malloc(len)) == NULL ||
    817 		    fread(buf, len, 1, f) != 1) {
    818 			free(buf);
    819 			buf = NULL;
    820 			len = 0;
    821 		}
    822 		fclose(f);
    823 	}
    824 	pe->cb(buf, len, pe->arg); /* callback now owns buffer */
    825 	popup_editor_free(pe);
    826 }
    827 
    828 int
    829 popup_editor(struct client *c, const char *buf, size_t len,
    830     popup_finish_edit_cb cb, void *arg)
    831 {
    832 	struct popup_editor	*pe;
    833 	int			 fd;
    834 	FILE			*f;
    835 	char			*cmd;
    836 	char			 path[] = _PATH_TMP "tmux.XXXXXXXX";
    837 	const char		*editor;
    838 	u_int			 px, py, sx, sy;
    839 
    840 	editor = options_get_string(global_options, "editor");
    841 	if (*editor == '\0')
    842 		return (-1);
    843 
    844 	fd = mkstemp(path);
    845 	if (fd == -1)
    846 		return (-1);
    847 	f = fdopen(fd, "w");
    848 	if (f == NULL)
    849 		return (-1);
    850 	if (fwrite(buf, len, 1, f) != 1) {
    851 		fclose(f);
    852 		return (-1);
    853 	}
    854 	fclose(f);
    855 
    856 	pe = xcalloc(1, sizeof *pe);
    857 	pe->path = xstrdup(path);
    858 	pe->cb = cb;
    859 	pe->arg = arg;
    860 
    861 	sx = c->tty.sx * 9 / 10;
    862 	sy = c->tty.sy * 9 / 10;
    863 	px = (c->tty.sx / 2) - (sx / 2);
    864 	py = (c->tty.sy / 2) - (sy / 2);
    865 
    866 	xasprintf(&cmd, "%s %s", editor, path);
    867 	if (popup_display(POPUP_INTERNAL|POPUP_CLOSEEXIT, BOX_LINES_DEFAULT,
    868 	    NULL, px, py, sx, sy, NULL, cmd, 0, NULL, _PATH_TMP, NULL, c, NULL,
    869 	    NULL, NULL, popup_editor_close_cb, pe) != 0) {
    870 		popup_editor_free(pe);
    871 		free(cmd);
    872 		return (-1);
    873 	}
    874 	free(cmd);
    875 	return (0);
    876 }
    877