window-choose.c - tmux - Rivoreo Source Code Repositories

 /* $Id: window-choose.c,v 1.30 2010-05-22 21:56:04 micahcowan Exp $ */

 /*
  * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
  *
  * 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 <string.h>

 #include "tmux.h"

 struct screen *window_choose_init(struct window_pane *);
 void	window_choose_free(struct window_pane *);
 void	window_choose_resize(struct window_pane *, u_int, u_int);
 void	window_choose_key(struct window_pane *, struct session *, int);
 void	window_choose_mouse(
 	    struct window_pane *, struct session *, struct mouse_event *);

 void	window_choose_redraw_screen(struct window_pane *);
 void	window_choose_write_line(
 	    struct window_pane *, struct screen_write_ctx *, u_int);

 void	window_choose_scroll_up(struct window_pane *);
 void	window_choose_scroll_down(struct window_pane *);

 const struct window_mode window_choose_mode = {
 	window_choose_init,
 	window_choose_free,
 	window_choose_resize,
 	window_choose_key,
 	window_choose_mouse,
 	NULL,
 };

 struct window_choose_mode_item {
 	char		       *name;
 	int			idx;
 };

 struct window_choose_mode_data {
 	struct screen	        screen;

 	struct mode_key_data	mdata;

 	ARRAY_DECL(, struct window_choose_mode_item) list;
 	u_int			top;
 	u_int			selected;

 	void 			(*callbackfn)(void *, int);
 	void			(*freefn)(void *);
 	void		       *data;
 };

 int	window_choose_key_index(struct window_choose_mode_data *, u_int);
 int	window_choose_index_key(struct window_choose_mode_data *, int);

 void
 window_choose_vadd(struct window_pane *wp, int idx, const char *fmt, va_list ap)
 {
 	struct window_choose_mode_data	*data = wp->modedata;
 	struct window_choose_mode_item	*item;

 	ARRAY_EXPAND(&data->list, 1);
 	item = &ARRAY_LAST(&data->list);
 	xvasprintf(&item->name, fmt, ap);
 	item->idx = idx;
 }

 void printflike3
 window_choose_add(struct window_pane *wp, int idx, const char *fmt, ...)
 {
 	va_list	ap;

 	va_start(ap, fmt);
 	window_choose_vadd(wp, idx, fmt, ap);
 	va_end(ap);
 }

 void
 window_choose_ready(struct window_pane *wp, u_int cur,
     void (*callbackfn)(void *, int), void (*freefn)(void *), void *cdata)
 {
 	struct window_choose_mode_data	*data = wp->modedata;
 	struct screen			*s = &data->screen;

 	data->selected = cur;
 	if (data->selected > screen_size_y(s) - 1)
 		data->top = ARRAY_LENGTH(&data->list) - screen_size_y(s);

 	data->callbackfn = callbackfn;
 	data->freefn = freefn;
 	data->data = cdata;

 	window_choose_redraw_screen(wp);
 }

 struct screen *
 window_choose_init(struct window_pane *wp)
 {
 	struct window_choose_mode_data	*data;
 	struct screen			*s;
 	int				 keys;

 	wp->modedata = data = xmalloc(sizeof *data);

 	data->callbackfn = NULL;
 	data->freefn = NULL;
 	data->data = NULL;

 	ARRAY_INIT(&data->list);
 	data->top = 0;

 	s = &data->screen;
 	screen_init(s, screen_size_x(&wp->base), screen_size_y(&wp->base), 0);
 	s->mode &= ~MODE_CURSOR;
 	if (options_get_number(&wp->window->options, "mode-mouse"))
 		s->mode |= MODE_MOUSE;

 	keys = options_get_number(&wp->window->options, "mode-keys");
 	if (keys == MODEKEY_EMACS)
 		mode_key_init(&data->mdata, &mode_key_tree_emacs_choice);
 	else
 		mode_key_init(&data->mdata, &mode_key_tree_vi_choice);

 	return (s);
 }

 void
 window_choose_free(struct window_pane *wp)
 {
 	struct window_choose_mode_data	*data = wp->modedata;
 	u_int				 i;

 	if (data->freefn != NULL && data->data != NULL)
 		data->freefn(data->data);

 	for (i = 0; i < ARRAY_LENGTH(&data->list); i++)
 		xfree(ARRAY_ITEM(&data->list, i).name);
 	ARRAY_FREE(&data->list);

 	screen_free(&data->screen);
 	xfree(data);
 }

 void
 window_choose_resize(struct window_pane *wp, u_int sx, u_int sy)
 {
 	struct window_choose_mode_data	*data = wp->modedata;
 	struct screen			*s = &data->screen;

 	data->top = 0;
 	if (data->selected > sy - 1)
 		data->top = data->selected - (sy - 1);

 	screen_resize(s, sx, sy);
 	window_choose_redraw_screen(wp);
 }

 /* ARGSUSED */
 void
 window_choose_key(struct window_pane *wp, unused struct session *sess, int key)
 {
 	struct window_choose_mode_data	*data = wp->modedata;
 	struct screen			*s = &data->screen;
 	struct screen_write_ctx		 ctx;
 	struct window_choose_mode_item	*item;
 	u_int		       		 items;
 	int				 idx;

 	items = ARRAY_LENGTH(&data->list);

 	switch (mode_key_lookup(&data->mdata, key)) {
 	case MODEKEYCHOICE_CANCEL:
 		data->callbackfn(data->data, -1);
 		window_pane_reset_mode(wp);
 		break;
 	case MODEKEYCHOICE_CHOOSE:
 		item = &ARRAY_ITEM(&data->list, data->selected);
 		data->callbackfn(data->data, item->idx);
 		window_pane_reset_mode(wp);
 		break;
 	case MODEKEYCHOICE_UP:
 		if (items == 0)
 			break;
 		if (data->selected == 0) {
 			data->selected = items - 1;
 			if (data->selected > screen_size_y(s) - 1)
 				data->top = items - screen_size_y(s);
 			window_choose_redraw_screen(wp);
 			break;
 		}
 		data->selected--;
 		if (data->selected < data->top)
 			window_choose_scroll_up(wp);
 		else {
 			screen_write_start(&ctx, wp, NULL);
 			window_choose_write_line(
 			    wp, &ctx, data->selected - data->top);
 			window_choose_write_line(
 			    wp, &ctx, data->selected + 1 - data->top);
 			screen_write_stop(&ctx);
 		}
 		break;
 	case MODEKEYCHOICE_DOWN:
 		if (items == 0)
 			break;
 		if (data->selected == items - 1) {
 			data->selected = 0;
 			data->top = 0;
 			window_choose_redraw_screen(wp);
 			break;
 		}
 		data->selected++;

 		if (data->selected < data->top + screen_size_y(s)) {
 			screen_write_start(&ctx, wp, NULL);
 			window_choose_write_line(
 			    wp, &ctx, data->selected - data->top);
 			window_choose_write_line(
 			    wp, &ctx, data->selected - 1 - data->top);
 			screen_write_stop(&ctx);
 		} else
 			window_choose_scroll_down(wp);
 		break;
 	case MODEKEYCHOICE_SCROLLUP:
 		if (items == 0 || data->top == 0)
 			break;
 		if (data->selected == data->top + screen_size_y(s) - 1) {
 			data->selected--;
 			window_choose_scroll_up(wp);
 			screen_write_start(&ctx, wp, NULL);
 			window_choose_write_line(
 			    wp, &ctx, screen_size_y(s) - 1);
 			screen_write_stop(&ctx);
 		} else
 			window_choose_scroll_up(wp);
 		break;
 	case MODEKEYCHOICE_SCROLLDOWN:
 		if (items == 0 ||
 		    data->top + screen_size_y(&data->screen) >= items)
 			break;
 		if (data->selected == data->top) {
 			data->selected++;
 			window_choose_scroll_down(wp);
 			screen_write_start(&ctx, wp, NULL);
 			window_choose_write_line(wp, &ctx, 0);
 			screen_write_stop(&ctx);
 		} else
 			window_choose_scroll_down(wp);
 		break;
 	case MODEKEYCHOICE_PAGEUP:
 		if (data->selected < screen_size_y(s)) {
 			data->selected = 0;
 			data->top = 0;
 		} else {
 			data->selected -= screen_size_y(s);
 			if (data->top < screen_size_y(s))
 				data->top = 0;
 			else
 				data->top -= screen_size_y(s);
 		}
 		window_choose_redraw_screen(wp);
 		break;
 	case MODEKEYCHOICE_PAGEDOWN:
 		data->selected += screen_size_y(s);
 		if (data->selected > items - 1)
 			data->selected = items - 1;
 		data->top += screen_size_y(s);
 		if (screen_size_y(s) < items) {
 			if (data->top + screen_size_y(s) > items)
 				data->top = items - screen_size_y(s);
 		} else
 			data->top = 0;
 		if (data->selected < data->top)
 			data->top = data->selected;
 		window_choose_redraw_screen(wp);
 		break;
 	default:
 		idx = window_choose_index_key(data, key);
 		if (idx < 0 || (u_int) idx >= ARRAY_LENGTH(&data->list))
 			break;
 		data->selected = idx;

 		item = &ARRAY_ITEM(&data->list, data->selected);
 		data->callbackfn(data->data, item->idx);
 		window_pane_reset_mode(wp);
 		break;
 	}
 }

 /* ARGSUSED */
 void
 window_choose_mouse(
     struct window_pane *wp, unused struct session *sess, struct mouse_event *m)
 {
 	struct window_choose_mode_data	*data = wp->modedata;
 	struct screen			*s = &data->screen;
 	struct window_choose_mode_item	*item;
 	u_int				 idx;

 	if ((m->b & 3) == 3)
 		return;
 	if (m->x >= screen_size_x(s))
 		return;
 	if (m->y >= screen_size_y(s))
 		return;

 	idx = data->top + m->y;
 	if (idx >= ARRAY_LENGTH(&data->list))
 		return;
 	data->selected = idx;

 	item = &ARRAY_ITEM(&data->list, data->selected);
 	data->callbackfn(data->data, item->idx);
 	window_pane_reset_mode(wp);
 }

 void
 window_choose_write_line(
     struct window_pane *wp, struct screen_write_ctx *ctx, u_int py)
 {
 	struct window_choose_mode_data	*data = wp->modedata;
 	struct window_choose_mode_item	*item;
 	struct options			*oo = &wp->window->options;
 	struct screen			*s = &data->screen;
 	struct grid_cell		 gc;
 	int				 utf8flag, key;

 	if (data->callbackfn == NULL)
 		fatalx("called before callback assigned");

 	utf8flag = options_get_number(&wp->window->options, "utf8");
 	memcpy(&gc, &grid_default_cell, sizeof gc);
 	if (data->selected == data->top + py) {
 		colour_set_fg(&gc, options_get_number(oo, "mode-fg"));
 		colour_set_bg(&gc, options_get_number(oo, "mode-bg"));
 		gc.attr |= options_get_number(oo, "mode-attr");
 	}

 	screen_write_cursormove(ctx, 0, py);
 	if (data->top + py  < ARRAY_LENGTH(&data->list)) {
 		item = &ARRAY_ITEM(&data->list, data->top + py);
 		key = window_choose_key_index(data, data->top + py);
 		if (key != -1) {
 			screen_write_nputs(ctx, screen_size_x(s) - 1,
 			    &gc, utf8flag, "(%c) %s", key, item->name);
 		} else {
 			screen_write_nputs(ctx, screen_size_x(s) - 1,
 			    &gc, utf8flag, "    %s", item->name);
 		}

 	}
 	while (s->cx < screen_size_x(s))
 		screen_write_putc(ctx, &gc, ' ');
 }

 int
 window_choose_key_index(struct window_choose_mode_data *data, u_int idx)
 {
 	static const char	keys[] = "0123456789abcdefghijklmnopqrstuvwxyz";
 	const char	       *ptr;
 	int			mkey;

 	for (ptr = keys; *ptr != '\0'; ptr++) {
 		mkey = mode_key_lookup(&data->mdata, *ptr);
 		if (mkey != MODEKEY_NONE && mkey != MODEKEY_OTHER)
 			continue;
 		if (idx-- == 0)
 			return (*ptr);
 	}
 	return (-1);
 }

 int
 window_choose_index_key(struct window_choose_mode_data *data, int key)
 {
 	static const char	keys[] = "0123456789abcdefghijklmnopqrstuvwxyz";
 	const char	       *ptr;
 	int			mkey;
 	u_int			idx = 0;

 	for (ptr = keys; *ptr != '\0'; ptr++) {
 		mkey = mode_key_lookup(&data->mdata, *ptr);
 		if (mkey != MODEKEY_NONE && mkey != MODEKEY_OTHER)
 			continue;
 		if (key == *ptr)
 			return (idx);
 		idx++;
 	}
 	return (-1);
 }

 void
 window_choose_redraw_screen(struct window_pane *wp)
 {
 	struct window_choose_mode_data	*data = wp->modedata;
 	struct screen			*s = &data->screen;
 	struct screen_write_ctx	 	 ctx;
 	u_int				 i;

 	screen_write_start(&ctx, wp, NULL);
 	for (i = 0; i < screen_size_y(s); i++)
 		window_choose_write_line(wp, &ctx, i);
 	screen_write_stop(&ctx);
 }

 void
 window_choose_scroll_up(struct window_pane *wp)
 {
 	struct window_choose_mode_data	*data = wp->modedata;
 	struct screen_write_ctx		 ctx;

 	if (data->top == 0)
 		return;
 	data->top--;

 	screen_write_start(&ctx, wp, NULL);
 	screen_write_cursormove(&ctx, 0, 0);
 	screen_write_insertline(&ctx, 1);
 	window_choose_write_line(wp, &ctx, 0);
 	if (screen_size_y(&data->screen) > 1)
 		window_choose_write_line(wp, &ctx, 1);
 	screen_write_stop(&ctx);
 }

 void
 window_choose_scroll_down(struct window_pane *wp)
 {
 	struct window_choose_mode_data	*data = wp->modedata;
 	struct screen			*s = &data->screen;
 	struct screen_write_ctx		 ctx;

 	if (data->top >= ARRAY_LENGTH(&data->list))
 		return;
 	data->top++;

 	screen_write_start(&ctx, wp, NULL);
 	screen_write_cursormove(&ctx, 0, 0);
 	screen_write_deleteline(&ctx, 1);
 	window_choose_write_line(wp, &ctx, screen_size_y(s) - 1);
 	if (screen_size_y(&data->screen) > 1)
 		window_choose_write_line(wp, &ctx, screen_size_y(s) - 2);
 	screen_write_stop(&ctx);
 }
	/* $Id: window-choose.c,v 1.30 2010-05-22 21:56:04 micahcowan Exp $ */

	/*
	* Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
	*
	* 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 <string.h>

	#include "tmux.h"

	struct screen window_choose_init(struct window_pane );
	void window_choose_free(struct window_pane *);
	void window_choose_resize(struct window_pane *, u_int, u_int);
	void window_choose_key(struct window_pane , struct session , int);
	void window_choose_mouse(
	struct window_pane , struct session , struct mouse_event *);

	void window_choose_redraw_screen(struct window_pane *);
	void window_choose_write_line(
	struct window_pane , struct screen_write_ctx , u_int);

	void window_choose_scroll_up(struct window_pane *);
	void window_choose_scroll_down(struct window_pane *);

	const struct window_mode window_choose_mode = {
	window_choose_init,
	window_choose_free,
	window_choose_resize,
	window_choose_key,
	window_choose_mouse,
	NULL,
	};

	struct window_choose_mode_item {
	char *name;
	int idx;
	};

	struct window_choose_mode_data {
	struct screen screen;

	struct mode_key_data mdata;

	ARRAY_DECL(, struct window_choose_mode_item) list;
	u_int top;
	u_int selected;

	void (callbackfn)(void , int);
	void (freefn)(void );
	void *data;
	};

	int window_choose_key_index(struct window_choose_mode_data *, u_int);
	int window_choose_index_key(struct window_choose_mode_data *, int);

	void
	window_choose_vadd(struct window_pane wp, int idx, const char fmt, va_list ap)
	{
	struct window_choose_mode_data *data = wp->modedata;
	struct window_choose_mode_item *item;

	ARRAY_EXPAND(&data->list, 1);
	item = &ARRAY_LAST(&data->list);
	xvasprintf(&item->name, fmt, ap);
	item->idx = idx;
	}

	void printflike3
	window_choose_add(struct window_pane wp, int idx, const char fmt, ...)
	{
	va_list ap;

	va_start(ap, fmt);
	window_choose_vadd(wp, idx, fmt, ap);
	va_end(ap);
	}

	void
	window_choose_ready(struct window_pane *wp, u_int cur,
	void (callbackfn)(void , int), void (freefn)(void ), void *cdata)
	{
	struct window_choose_mode_data *data = wp->modedata;
	struct screen *s = &data->screen;

	data->selected = cur;
	if (data->selected > screen_size_y(s) - 1)
	data->top = ARRAY_LENGTH(&data->list) - screen_size_y(s);

	data->callbackfn = callbackfn;
	data->freefn = freefn;
	data->data = cdata;

	window_choose_redraw_screen(wp);
	}

	struct screen *
	window_choose_init(struct window_pane *wp)
	{
	struct window_choose_mode_data *data;
	struct screen *s;
	int keys;

	wp->modedata = data = xmalloc(sizeof *data);

	data->callbackfn = NULL;
	data->freefn = NULL;
	data->data = NULL;

	ARRAY_INIT(&data->list);
	data->top = 0;

	s = &data->screen;
	screen_init(s, screen_size_x(&wp->base), screen_size_y(&wp->base), 0);
	s->mode &= ~MODE_CURSOR;
	if (options_get_number(&wp->window->options, "mode-mouse"))
	s->mode \|= MODE_MOUSE;

	keys = options_get_number(&wp->window->options, "mode-keys");
	if (keys == MODEKEY_EMACS)
	mode_key_init(&data->mdata, &mode_key_tree_emacs_choice);
	else
	mode_key_init(&data->mdata, &mode_key_tree_vi_choice);

	return (s);
	}

	void
	window_choose_free(struct window_pane *wp)
	{
	struct window_choose_mode_data *data = wp->modedata;
	u_int i;

	if (data->freefn != NULL && data->data != NULL)
	data->freefn(data->data);

	for (i = 0; i < ARRAY_LENGTH(&data->list); i++)
	xfree(ARRAY_ITEM(&data->list, i).name);
	ARRAY_FREE(&data->list);

	screen_free(&data->screen);
	xfree(data);
	}

	void
	window_choose_resize(struct window_pane *wp, u_int sx, u_int sy)
	{
	struct window_choose_mode_data *data = wp->modedata;
	struct screen *s = &data->screen;

	data->top = 0;
	if (data->selected > sy - 1)
	data->top = data->selected - (sy - 1);

	screen_resize(s, sx, sy);
	window_choose_redraw_screen(wp);
	}

	/* ARGSUSED */
	void
	window_choose_key(struct window_pane wp, unused struct session sess, int key)
	{
	struct window_choose_mode_data *data = wp->modedata;
	struct screen *s = &data->screen;
	struct screen_write_ctx ctx;
	struct window_choose_mode_item *item;
	u_int items;
	int idx;

	items = ARRAY_LENGTH(&data->list);

	switch (mode_key_lookup(&data->mdata, key)) {
	case MODEKEYCHOICE_CANCEL:
	data->callbackfn(data->data, -1);
	window_pane_reset_mode(wp);
	break;
	case MODEKEYCHOICE_CHOOSE:
	item = &ARRAY_ITEM(&data->list, data->selected);
	data->callbackfn(data->data, item->idx);
	window_pane_reset_mode(wp);
	break;
	case MODEKEYCHOICE_UP:
	if (items == 0)
	break;
	if (data->selected == 0) {
	data->selected = items - 1;
	if (data->selected > screen_size_y(s) - 1)
	data->top = items - screen_size_y(s);
	window_choose_redraw_screen(wp);
	break;
	}
	data->selected--;
	if (data->selected < data->top)
	window_choose_scroll_up(wp);
	else {
	screen_write_start(&ctx, wp, NULL);
	window_choose_write_line(
	wp, &ctx, data->selected - data->top);
	window_choose_write_line(
	wp, &ctx, data->selected + 1 - data->top);
	screen_write_stop(&ctx);
	}
	break;
	case MODEKEYCHOICE_DOWN:
	if (items == 0)
	break;
	if (data->selected == items - 1) {
	data->selected = 0;
	data->top = 0;
	window_choose_redraw_screen(wp);
	break;
	}
	data->selected++;

	if (data->selected < data->top + screen_size_y(s)) {
	screen_write_start(&ctx, wp, NULL);
	window_choose_write_line(
	wp, &ctx, data->selected - data->top);
	window_choose_write_line(
	wp, &ctx, data->selected - 1 - data->top);
	screen_write_stop(&ctx);
	} else
	window_choose_scroll_down(wp);
	break;
	case MODEKEYCHOICE_SCROLLUP:
	if (items == 0 \|\| data->top == 0)
	break;
	if (data->selected == data->top + screen_size_y(s) - 1) {
	data->selected--;
	window_choose_scroll_up(wp);
	screen_write_start(&ctx, wp, NULL);
	window_choose_write_line(
	wp, &ctx, screen_size_y(s) - 1);
	screen_write_stop(&ctx);
	} else
	window_choose_scroll_up(wp);
	break;
	case MODEKEYCHOICE_SCROLLDOWN:
	if (items == 0 \|\|
	data->top + screen_size_y(&data->screen) >= items)
	break;
	if (data->selected == data->top) {
	data->selected++;
	window_choose_scroll_down(wp);
	screen_write_start(&ctx, wp, NULL);
	window_choose_write_line(wp, &ctx, 0);
	screen_write_stop(&ctx);
	} else
	window_choose_scroll_down(wp);
	break;
	case MODEKEYCHOICE_PAGEUP:
	if (data->selected < screen_size_y(s)) {
	data->selected = 0;
	data->top = 0;
	} else {
	data->selected -= screen_size_y(s);
	if (data->top < screen_size_y(s))
	data->top = 0;
	else
	data->top -= screen_size_y(s);
	}
	window_choose_redraw_screen(wp);
	break;
	case MODEKEYCHOICE_PAGEDOWN:
	data->selected += screen_size_y(s);
	if (data->selected > items - 1)
	data->selected = items - 1;
	data->top += screen_size_y(s);
	if (screen_size_y(s) < items) {
	if (data->top + screen_size_y(s) > items)
	data->top = items - screen_size_y(s);
	} else
	data->top = 0;
	if (data->selected < data->top)
	data->top = data->selected;
	window_choose_redraw_screen(wp);
	break;
	default:
	idx = window_choose_index_key(data, key);
	if (idx < 0 \|\| (u_int) idx >= ARRAY_LENGTH(&data->list))
	break;
	data->selected = idx;

	item = &ARRAY_ITEM(&data->list, data->selected);
	data->callbackfn(data->data, item->idx);
	window_pane_reset_mode(wp);
	break;
	}
	}

	/* ARGSUSED */
	void
	window_choose_mouse(
	struct window_pane wp, unused struct session sess, struct mouse_event *m)
	{
	struct window_choose_mode_data *data = wp->modedata;
	struct screen *s = &data->screen;
	struct window_choose_mode_item *item;
	u_int idx;

	if ((m->b & 3) == 3)
	return;
	if (m->x >= screen_size_x(s))
	return;
	if (m->y >= screen_size_y(s))
	return;

	idx = data->top + m->y;
	if (idx >= ARRAY_LENGTH(&data->list))
	return;
	data->selected = idx;

	item = &ARRAY_ITEM(&data->list, data->selected);
	data->callbackfn(data->data, item->idx);
	window_pane_reset_mode(wp);
	}

	void
	window_choose_write_line(
	struct window_pane wp, struct screen_write_ctx ctx, u_int py)
	{
	struct window_choose_mode_data *data = wp->modedata;
	struct window_choose_mode_item *item;
	struct options *oo = &wp->window->options;
	struct screen *s = &data->screen;
	struct grid_cell gc;
	int utf8flag, key;

	if (data->callbackfn == NULL)
	fatalx("called before callback assigned");

	utf8flag = options_get_number(&wp->window->options, "utf8");
	memcpy(&gc, &grid_default_cell, sizeof gc);
	if (data->selected == data->top + py) {
	colour_set_fg(&gc, options_get_number(oo, "mode-fg"));
	colour_set_bg(&gc, options_get_number(oo, "mode-bg"));
	gc.attr \|= options_get_number(oo, "mode-attr");
	}

	screen_write_cursormove(ctx, 0, py);
	if (data->top + py < ARRAY_LENGTH(&data->list)) {
	item = &ARRAY_ITEM(&data->list, data->top + py);
	key = window_choose_key_index(data, data->top + py);
	if (key != -1) {
	screen_write_nputs(ctx, screen_size_x(s) - 1,
	&gc, utf8flag, "(%c) %s", key, item->name);
	} else {
	screen_write_nputs(ctx, screen_size_x(s) - 1,
	&gc, utf8flag, " %s", item->name);
	}

	}
	while (s->cx < screen_size_x(s))
	screen_write_putc(ctx, &gc, ' ');
	}

	int
	window_choose_key_index(struct window_choose_mode_data *data, u_int idx)
	{
	static const char keys[] = "0123456789abcdefghijklmnopqrstuvwxyz";
	const char *ptr;
	int mkey;

	for (ptr = keys; *ptr != '\0'; ptr++) {
	mkey = mode_key_lookup(&data->mdata, *ptr);
	if (mkey != MODEKEY_NONE && mkey != MODEKEY_OTHER)
	continue;
	if (idx-- == 0)
	return (*ptr);
	}
	return (-1);
	}

	int
	window_choose_index_key(struct window_choose_mode_data *data, int key)
	{
	static const char keys[] = "0123456789abcdefghijklmnopqrstuvwxyz";
	const char *ptr;
	int mkey;
	u_int idx = 0;

	for (ptr = keys; *ptr != '\0'; ptr++) {
	mkey = mode_key_lookup(&data->mdata, *ptr);
	if (mkey != MODEKEY_NONE && mkey != MODEKEY_OTHER)
	continue;
	if (key == *ptr)
	return (idx);
	idx++;
	}
	return (-1);
	}

	void
	window_choose_redraw_screen(struct window_pane *wp)
	{
	struct window_choose_mode_data *data = wp->modedata;
	struct screen *s = &data->screen;
	struct screen_write_ctx ctx;
	u_int i;

	screen_write_start(&ctx, wp, NULL);
	for (i = 0; i < screen_size_y(s); i++)
	window_choose_write_line(wp, &ctx, i);
	screen_write_stop(&ctx);
	}

	void
	window_choose_scroll_up(struct window_pane *wp)
	{
	struct window_choose_mode_data *data = wp->modedata;
	struct screen_write_ctx ctx;

	if (data->top == 0)
	return;
	data->top--;

	screen_write_start(&ctx, wp, NULL);
	screen_write_cursormove(&ctx, 0, 0);
	screen_write_insertline(&ctx, 1);
	window_choose_write_line(wp, &ctx, 0);
	if (screen_size_y(&data->screen) > 1)
	window_choose_write_line(wp, &ctx, 1);
	screen_write_stop(&ctx);
	}

	void
	window_choose_scroll_down(struct window_pane *wp)
	{
	struct window_choose_mode_data *data = wp->modedata;
	struct screen *s = &data->screen;
	struct screen_write_ctx ctx;

	if (data->top >= ARRAY_LENGTH(&data->list))
	return;
	data->top++;

	screen_write_start(&ctx, wp, NULL);
	screen_write_cursormove(&ctx, 0, 0);
	screen_write_deleteline(&ctx, 1);
	window_choose_write_line(wp, &ctx, screen_size_y(s) - 1);
	if (screen_size_y(&data->screen) > 1)
	window_choose_write_line(wp, &ctx, screen_size_y(s) - 2);
	screen_write_stop(&ctx);
	}