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

 /* $Id: window-copy.c,v 1.1 2007-11-22 18:09:43 nicm Exp $ */

 /*
  * Copyright (c) 2007 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"

 void	window_copy_init(struct window *);
 void	window_copy_resize(struct window *, u_int, u_int);
 void	window_copy_draw(struct window *, struct buffer *, u_int, u_int);
 void	window_copy_key(struct window *, int);

 void	window_copy_draw_position(struct window *, struct screen_draw_ctx *);

 u_int	window_copy_line_length(struct window *);
 void	window_copy_move_cursor(struct window *);
 void	window_copy_cursor_left(struct window *);
 void	window_copy_cursor_right(struct window *);
 void	window_copy_cursor_up(struct window *);
 void	window_copy_cursor_down(struct window *);
 void	window_copy_scroll_left(struct window *, u_int);
 void	window_copy_scroll_right(struct window *, u_int);
 void	window_copy_scroll_up(struct window *, u_int);
 void	window_copy_scroll_down(struct window *, u_int);

 const struct window_mode window_copy_mode = {
 	window_copy_init,
 	window_copy_resize,
 	window_copy_draw,
 	window_copy_key
 };

 struct window_copy_mode_data {
 	u_int	ox;
 	u_int	oy;
 	u_int	cx;
 	u_int	cy;
 	u_int	size;
 };

 void
 window_copy_init(struct window *w)
 {
 	struct window_copy_mode_data	*data;

 	w->modedata = data = xmalloc(sizeof *data);
 	data->ox = data->oy = 0;
 	data->cx = w->screen.cx;
 	data->cy = w->screen.cy;
 	data->size = w->screen.hsize;

 	w->screen.mode |= (MODE_BACKGROUND|MODE_BGCURSOR);
 }

 void
 window_copy_resize(unused struct window *w, unused u_int sx, unused u_int sy)
 {
 }

 void
 window_copy_draw_position(struct window *w, struct screen_draw_ctx *ctx)
 {
 	struct window_copy_mode_data	*data = w->modedata;
 	char				*ptr, buf[32];
 	size_t	 			 len;

 	len = xsnprintf(
 	    buf, sizeof buf, "[%u,%u/%u]", data->ox, data->oy, data->size);
 	if (len <= screen_size_x(ctx->s))
 		ptr = buf;
 	else {
 		ptr = buf + len - screen_size_x(ctx->s);
 		len -= len - screen_size_x(ctx->s);
 	}

 	screen_draw_cells(ctx, 0, 0, screen_size_x(ctx->s) - len);

 	screen_draw_move(ctx, screen_size_x(ctx->s) - len, 0);
 	screen_draw_set_attributes(ctx, 0, status_colour);
 	buffer_write(ctx->b, ptr, len);
 }

 void
 window_copy_draw(struct window *w, struct buffer *b, u_int py, u_int ny)
 {
 	struct window_copy_mode_data	*data = w->modedata;
 	struct screen			*s = &w->screen;
 	struct screen_draw_ctx		 ctx;

 	if (s->hsize != data->size) {
 		data->oy += s->hsize - data->size;
 		data->size = s->hsize;
 	}

 	screen_draw_start(&ctx, s, b, data->ox, data->oy);
 	if (py != 0)
 		screen_draw_lines(&ctx, py, ny);
 	else if (ny > 1)
 		screen_draw_lines(&ctx, py + 1, ny - 1);

 	if (py == 0)
 		window_copy_draw_position(w, &ctx);

 	screen_draw_stop(&ctx);

 	input_store_two(b, CODE_CURSORMOVE, data->cy + 1, data->cx  + 1);
 }

 void
 window_copy_key(struct window *w, int key)
 {
 	struct window_copy_mode_data	*data = w->modedata;
 	u_int				 oy, sy;

 	sy = screen_size_y(&w->screen);
 	oy = data->oy;

 	switch (key) {
 	case 'Q':
 	case 'q':
 		w->mode = NULL;
 		xfree(w->modedata);

 		w->screen.mode &= ~MODE_BACKGROUND;

 		recalculate_sizes();
 		server_redraw_window_all(w);
 		return;
 	case 'h':
 	case KEYC_LEFT:
 		window_copy_cursor_left(w);
 		return;
 	case 'l':
 	case KEYC_RIGHT:
 		window_copy_cursor_right(w);
  		return;
 	case 'k':
 	case 'K':
 	case KEYC_UP:
 		window_copy_cursor_up(w);
 		return;
 	case 'j':
 	case 'J':
 	case KEYC_DOWN:
 		window_copy_cursor_down(w);
 		return;
 	case '\025':	/* C-u */
 	case KEYC_PPAGE:
 		if (data->oy + sy > data->size)
 			data->oy = data->size;
 		else
 			data->oy += sy;
 		break;
 	case '\006':	/* C-f */
 	case KEYC_NPAGE:
 		if (data->oy < sy)
 			data->oy = 0;
 		else
 			data->oy -= sy;
 		break;
 	/* XXX start/end of line, next word, prev word */
 	}
 	if (data->oy != oy) {
 		server_redraw_window_all(w);
 		window_copy_move_cursor(w);
 	}
 }

 void
 window_copy_move_cursor(struct window *w)
 {
 	struct window_copy_mode_data	*data = w->modedata;
 	struct client			*c;
 	u_int		 		 i;
 	struct hdr			 hdr;
 	size_t				 size;

 	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
 		c = ARRAY_ITEM(&clients, i);
 		if (c == NULL || c->session == NULL)
 			continue;
 		if (!session_has(c->session, w))
 			continue;

 		buffer_ensure(c->out, sizeof hdr);
 		buffer_add(c->out, sizeof hdr);
 		size = BUFFER_USED(c->out);

 		input_store_two(
 		    c->out, CODE_CURSORMOVE, data->cy + 1, data->cx + 1);

 		size = BUFFER_USED(c->out) - size;
 		hdr.type = MSG_DATA;
 		hdr.size = size;
 		memcpy(BUFFER_IN(c->out) - size - sizeof hdr, &hdr, sizeof hdr);
 	}
 }

 void
 window_copy_cursor_left(struct window *w)
 {
 	struct window_copy_mode_data	*data = w->modedata;

 	if (data->ox + data->cx == 0)
 		return;

 	if (data->cx == 0)
 		window_copy_scroll_right(w, 1);
 	else
 		data->cx--;
 	window_copy_move_cursor(w);
 }

 void
 window_copy_cursor_right(struct window *w)
 {
 	struct window_copy_mode_data	*data = w->modedata;
 	struct screen			*s = &w->screen;

 	if (data->ox + data->cx == SHRT_MAX)
 		return;

 	if (data->cx == screen_last_x(s))
 		window_copy_scroll_left(w, 1);
 	else
 		data->cx++;
 	window_copy_move_cursor(w);
 }

 void
 window_copy_cursor_up(struct window *w)
 {
 	struct window_copy_mode_data	*data = w->modedata;

 	if (data->cy == 0 && data->oy == data->size)
 		return;

 	if (data->cy == 0)
 		window_copy_scroll_down(w, 1);
 	else
 		data->cy--;
 	window_copy_move_cursor(w);
 }

 void
 window_copy_cursor_down(struct window *w)
 {
 	struct window_copy_mode_data	*data = w->modedata;
 	struct screen			*s = &w->screen;

 	if (data->cy == screen_last_y(s) && data->oy == 0)
 		return;

 	if (data->cy == screen_last_y(s))
 		window_copy_scroll_up(w, 1);
 	else
 		data->cy++;
 	window_copy_move_cursor(w);
 }

 void
 window_copy_scroll_left(struct window *w, u_int nx)
 {
 	struct window_copy_mode_data	*data = w->modedata;
 	struct screen			*s = &w->screen;
 	struct screen_draw_ctx		 ctx;
 	struct client			*c;
 	struct buffer			*b;
 	u_int		 		 i, j;
 	struct hdr			 hdr;
 	size_t				 size;

 	if (data->ox >= SHRT_MAX - nx)
 		nx = SHRT_MAX - data->ox;
 	if (nx == 0)
 		return;
 	data->ox += nx;

 	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
 		c = ARRAY_ITEM(&clients, i);
 		if (c == NULL || c->session == NULL)
 			continue;
 		if (!session_has(c->session, w))
 			continue;
 		b = c->out;

 		buffer_ensure(b, sizeof hdr);
 		buffer_add(b, sizeof hdr);
 		size = BUFFER_USED(b);

 		screen_draw_start(&ctx, s, b, data->ox, data->oy);
 		for (j = 1; j < screen_size_y(s); j++) {
 			screen_draw_move(&ctx, 0, j);
 			input_store_one(b, CODE_DELETECHARACTER, nx);
 		}
 		for (j = 0; j < nx; j++)
 			screen_draw_column(&ctx, screen_last_x(s) - j);
 		window_copy_draw_position(w, &ctx);
 		screen_draw_stop(&ctx);

 		size = BUFFER_USED(b) - size;
 		hdr.type = MSG_DATA;
 		hdr.size = size;
 		memcpy(BUFFER_IN(b) - size - sizeof hdr, &hdr, sizeof hdr);
 	}
 }

 void
 window_copy_scroll_right(struct window *w, u_int nx)
 {
 	struct window_copy_mode_data	*data = w->modedata;
 	struct screen			*s = &w->screen;
 	struct screen_draw_ctx		 ctx;
 	struct client			*c;
 	struct buffer			*b;
 	u_int		 		 i, j;
 	struct hdr			 hdr;
 	size_t				 size;

 	if (data->ox < nx)
 		nx = data->ox;
 	if (nx == 0)
 		return;
 	data->ox -= nx;

 	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
 		c = ARRAY_ITEM(&clients, i);
 		if (c == NULL || c->session == NULL)
 			continue;
 		if (!session_has(c->session, w))
 			continue;
 		b = c->out;

 		buffer_ensure(b, sizeof hdr);
 		buffer_add(b, sizeof hdr);
 		size = BUFFER_USED(b);

 		screen_draw_start(&ctx, s, b, data->ox, data->oy);
 		for (j = 1; j < screen_size_y(s); j++) {
 			screen_draw_move(&ctx, 0, j);
 			input_store_one(b, CODE_INSERTCHARACTER, nx);
 		}
 		for (j = 0; j < nx; j++)
 			screen_draw_column(&ctx, j);
 		window_copy_draw_position(w, &ctx);
 		screen_draw_stop(&ctx);

 		size = BUFFER_USED(b) - size;
 		hdr.type = MSG_DATA;
 		hdr.size = size;
 		memcpy(BUFFER_IN(b) - size - sizeof hdr, &hdr, sizeof hdr);
 	}
 }

 void
 window_copy_scroll_up(struct window *w, u_int ny)
 {
 	struct window_copy_mode_data	*data = w->modedata;
 	struct screen			*s = &w->screen;
 	struct screen_draw_ctx		 ctx;
 	struct client			*c;
 	u_int		 		 i;
 	struct hdr			 hdr;
 	size_t				 size;

 	if (data->oy < ny)
 		ny = data->oy;
 	if (ny == 0)
 		return;
 	data->oy -= ny;

 	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
 		c = ARRAY_ITEM(&clients, i);
 		if (c == NULL || c->session == NULL)
 			continue;
 		if (!session_has(c->session, w))
 			continue;

 		buffer_ensure(c->out, sizeof hdr);
 		buffer_add(c->out, sizeof hdr);
 		size = BUFFER_USED(c->out);

 		screen_draw_start(&ctx, s, c->out, data->ox, data->oy);
 		screen_draw_move(&ctx, 0, 0);
 		input_store_one(c->out, CODE_DELETELINE, ny);
 		for (i = 0; i < ny; i++)
 			screen_draw_line(&ctx, screen_last_y(s) - i);
 		window_copy_draw_position(w, &ctx);
 		screen_draw_stop(&ctx);

 		size = BUFFER_USED(c->out) - size;
 		hdr.type = MSG_DATA;
 		hdr.size = size;
 		memcpy(BUFFER_IN(c->out) - size - sizeof hdr, &hdr, sizeof hdr);
 	}
 }

 void
 window_copy_scroll_down(struct window *w, u_int ny)
 {
 	struct window_copy_mode_data	*data = w->modedata;
 	struct screen			*s = &w->screen;
 	struct screen_draw_ctx		 ctx;
 	struct client			*c;
 	u_int		 		 i;
 	struct hdr			 hdr;
 	size_t				 size;

 	if (data->oy >= data->size - ny)
 		ny = data->size - data->oy;
 	if (ny == 0)
 		return;
 	data->oy += ny;

 	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
 		c = ARRAY_ITEM(&clients, i);
 		if (c == NULL || c->session == NULL)
 			continue;
 		if (!session_has(c->session, w))
 			continue;

 		buffer_ensure(c->out, sizeof hdr);
 		buffer_add(c->out, sizeof hdr);
 		size = BUFFER_USED(c->out);

 		screen_draw_start(&ctx, s, c->out, data->ox, data->oy);
 		screen_draw_move(&ctx, 0, 0);
 		input_store_one(c->out, CODE_INSERTLINE, ny);
 		for (i = 1; i < ny + 1; i++)
 			screen_draw_line(&ctx, i);
 		window_copy_draw_position(w, &ctx);
 		screen_draw_stop(&ctx);

 		size = BUFFER_USED(c->out) - size;
 		hdr.type = MSG_DATA;
 		hdr.size = size;
 		memcpy(BUFFER_IN(c->out) - size - sizeof hdr, &hdr, sizeof hdr);
 	}
 }
	/* $Id: window-copy.c,v 1.1 2007-11-22 18:09:43 nicm Exp $ */

	/*
	* Copyright (c) 2007 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"

	void window_copy_init(struct window *);
	void window_copy_resize(struct window *, u_int, u_int);
	void window_copy_draw(struct window , struct buffer , u_int, u_int);
	void window_copy_key(struct window *, int);

	void window_copy_draw_position(struct window , struct screen_draw_ctx );

	u_int window_copy_line_length(struct window *);
	void window_copy_move_cursor(struct window *);
	void window_copy_cursor_left(struct window *);
	void window_copy_cursor_right(struct window *);
	void window_copy_cursor_up(struct window *);
	void window_copy_cursor_down(struct window *);
	void window_copy_scroll_left(struct window *, u_int);
	void window_copy_scroll_right(struct window *, u_int);
	void window_copy_scroll_up(struct window *, u_int);
	void window_copy_scroll_down(struct window *, u_int);

	const struct window_mode window_copy_mode = {
	window_copy_init,
	window_copy_resize,
	window_copy_draw,
	window_copy_key
	};

	struct window_copy_mode_data {
	u_int ox;
	u_int oy;
	u_int cx;
	u_int cy;
	u_int size;
	};

	void
	window_copy_init(struct window *w)
	{
	struct window_copy_mode_data *data;

	w->modedata = data = xmalloc(sizeof *data);
	data->ox = data->oy = 0;
	data->cx = w->screen.cx;
	data->cy = w->screen.cy;
	data->size = w->screen.hsize;

	w->screen.mode \|= (MODE_BACKGROUND\|MODE_BGCURSOR);
	}

	void
	window_copy_resize(unused struct window *w, unused u_int sx, unused u_int sy)
	{
	}

	void
	window_copy_draw_position(struct window w, struct screen_draw_ctx ctx)
	{
	struct window_copy_mode_data *data = w->modedata;
	char *ptr, buf[32];
	size_t len;

	len = xsnprintf(
	buf, sizeof buf, "[%u,%u/%u]", data->ox, data->oy, data->size);
	if (len <= screen_size_x(ctx->s))
	ptr = buf;
	else {
	ptr = buf + len - screen_size_x(ctx->s);
	len -= len - screen_size_x(ctx->s);
	}

	screen_draw_cells(ctx, 0, 0, screen_size_x(ctx->s) - len);

	screen_draw_move(ctx, screen_size_x(ctx->s) - len, 0);
	screen_draw_set_attributes(ctx, 0, status_colour);
	buffer_write(ctx->b, ptr, len);
	}

	void
	window_copy_draw(struct window w, struct buffer b, u_int py, u_int ny)
	{
	struct window_copy_mode_data *data = w->modedata;
	struct screen *s = &w->screen;
	struct screen_draw_ctx ctx;

	if (s->hsize != data->size) {
	data->oy += s->hsize - data->size;
	data->size = s->hsize;
	}

	screen_draw_start(&ctx, s, b, data->ox, data->oy);
	if (py != 0)
	screen_draw_lines(&ctx, py, ny);
	else if (ny > 1)
	screen_draw_lines(&ctx, py + 1, ny - 1);

	if (py == 0)
	window_copy_draw_position(w, &ctx);

	screen_draw_stop(&ctx);

	input_store_two(b, CODE_CURSORMOVE, data->cy + 1, data->cx + 1);
	}

	void
	window_copy_key(struct window *w, int key)
	{
	struct window_copy_mode_data *data = w->modedata;
	u_int oy, sy;

	sy = screen_size_y(&w->screen);
	oy = data->oy;

	switch (key) {
	case 'Q':
	case 'q':
	w->mode = NULL;
	xfree(w->modedata);

	w->screen.mode &= ~MODE_BACKGROUND;

	recalculate_sizes();
	server_redraw_window_all(w);
	return;
	case 'h':
	case KEYC_LEFT:
	window_copy_cursor_left(w);
	return;
	case 'l':
	case KEYC_RIGHT:
	window_copy_cursor_right(w);
	return;
	case 'k':
	case 'K':
	case KEYC_UP:
	window_copy_cursor_up(w);
	return;
	case 'j':
	case 'J':
	case KEYC_DOWN:
	window_copy_cursor_down(w);
	return;
	case '\025': /* C-u */
	case KEYC_PPAGE:
	if (data->oy + sy > data->size)
	data->oy = data->size;
	else
	data->oy += sy;
	break;
	case '\006': /* C-f */
	case KEYC_NPAGE:
	if (data->oy < sy)
	data->oy = 0;
	else
	data->oy -= sy;
	break;
	/* XXX start/end of line, next word, prev word */
	}
	if (data->oy != oy) {
	server_redraw_window_all(w);
	window_copy_move_cursor(w);
	}
	}

	void
	window_copy_move_cursor(struct window *w)
	{
	struct window_copy_mode_data *data = w->modedata;
	struct client *c;
	u_int i;
	struct hdr hdr;
	size_t size;

	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
	c = ARRAY_ITEM(&clients, i);
	if (c == NULL \|\| c->session == NULL)
	continue;
	if (!session_has(c->session, w))
	continue;

	buffer_ensure(c->out, sizeof hdr);
	buffer_add(c->out, sizeof hdr);
	size = BUFFER_USED(c->out);

	input_store_two(
	c->out, CODE_CURSORMOVE, data->cy + 1, data->cx + 1);

	size = BUFFER_USED(c->out) - size;
	hdr.type = MSG_DATA;
	hdr.size = size;
	memcpy(BUFFER_IN(c->out) - size - sizeof hdr, &hdr, sizeof hdr);
	}
	}

	void
	window_copy_cursor_left(struct window *w)
	{
	struct window_copy_mode_data *data = w->modedata;

	if (data->ox + data->cx == 0)
	return;

	if (data->cx == 0)
	window_copy_scroll_right(w, 1);
	else
	data->cx--;
	window_copy_move_cursor(w);
	}

	void
	window_copy_cursor_right(struct window *w)
	{
	struct window_copy_mode_data *data = w->modedata;
	struct screen *s = &w->screen;

	if (data->ox + data->cx == SHRT_MAX)
	return;

	if (data->cx == screen_last_x(s))
	window_copy_scroll_left(w, 1);
	else
	data->cx++;
	window_copy_move_cursor(w);
	}

	void
	window_copy_cursor_up(struct window *w)
	{
	struct window_copy_mode_data *data = w->modedata;

	if (data->cy == 0 && data->oy == data->size)
	return;

	if (data->cy == 0)
	window_copy_scroll_down(w, 1);
	else
	data->cy--;
	window_copy_move_cursor(w);
	}

	void
	window_copy_cursor_down(struct window *w)
	{
	struct window_copy_mode_data *data = w->modedata;
	struct screen *s = &w->screen;

	if (data->cy == screen_last_y(s) && data->oy == 0)
	return;

	if (data->cy == screen_last_y(s))
	window_copy_scroll_up(w, 1);
	else
	data->cy++;
	window_copy_move_cursor(w);
	}

	void
	window_copy_scroll_left(struct window *w, u_int nx)
	{
	struct window_copy_mode_data *data = w->modedata;
	struct screen *s = &w->screen;
	struct screen_draw_ctx ctx;
	struct client *c;
	struct buffer *b;
	u_int i, j;
	struct hdr hdr;
	size_t size;

	if (data->ox >= SHRT_MAX - nx)
	nx = SHRT_MAX - data->ox;
	if (nx == 0)
	return;
	data->ox += nx;

	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
	c = ARRAY_ITEM(&clients, i);
	if (c == NULL \|\| c->session == NULL)
	continue;
	if (!session_has(c->session, w))
	continue;
	b = c->out;

	buffer_ensure(b, sizeof hdr);
	buffer_add(b, sizeof hdr);
	size = BUFFER_USED(b);

	screen_draw_start(&ctx, s, b, data->ox, data->oy);
	for (j = 1; j < screen_size_y(s); j++) {
	screen_draw_move(&ctx, 0, j);
	input_store_one(b, CODE_DELETECHARACTER, nx);
	}
	for (j = 0; j < nx; j++)
	screen_draw_column(&ctx, screen_last_x(s) - j);
	window_copy_draw_position(w, &ctx);
	screen_draw_stop(&ctx);

	size = BUFFER_USED(b) - size;
	hdr.type = MSG_DATA;
	hdr.size = size;
	memcpy(BUFFER_IN(b) - size - sizeof hdr, &hdr, sizeof hdr);
	}
	}

	void
	window_copy_scroll_right(struct window *w, u_int nx)
	{
	struct window_copy_mode_data *data = w->modedata;
	struct screen *s = &w->screen;
	struct screen_draw_ctx ctx;
	struct client *c;
	struct buffer *b;
	u_int i, j;
	struct hdr hdr;
	size_t size;

	if (data->ox < nx)
	nx = data->ox;
	if (nx == 0)
	return;
	data->ox -= nx;

	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
	c = ARRAY_ITEM(&clients, i);
	if (c == NULL \|\| c->session == NULL)
	continue;
	if (!session_has(c->session, w))
	continue;
	b = c->out;

	buffer_ensure(b, sizeof hdr);
	buffer_add(b, sizeof hdr);
	size = BUFFER_USED(b);

	screen_draw_start(&ctx, s, b, data->ox, data->oy);
	for (j = 1; j < screen_size_y(s); j++) {
	screen_draw_move(&ctx, 0, j);
	input_store_one(b, CODE_INSERTCHARACTER, nx);
	}
	for (j = 0; j < nx; j++)
	screen_draw_column(&ctx, j);
	window_copy_draw_position(w, &ctx);
	screen_draw_stop(&ctx);

	size = BUFFER_USED(b) - size;
	hdr.type = MSG_DATA;
	hdr.size = size;
	memcpy(BUFFER_IN(b) - size - sizeof hdr, &hdr, sizeof hdr);
	}
	}

	void
	window_copy_scroll_up(struct window *w, u_int ny)
	{
	struct window_copy_mode_data *data = w->modedata;
	struct screen *s = &w->screen;
	struct screen_draw_ctx ctx;
	struct client *c;
	u_int i;
	struct hdr hdr;
	size_t size;

	if (data->oy < ny)
	ny = data->oy;
	if (ny == 0)
	return;
	data->oy -= ny;

	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
	c = ARRAY_ITEM(&clients, i);
	if (c == NULL \|\| c->session == NULL)
	continue;
	if (!session_has(c->session, w))
	continue;

	buffer_ensure(c->out, sizeof hdr);
	buffer_add(c->out, sizeof hdr);
	size = BUFFER_USED(c->out);

	screen_draw_start(&ctx, s, c->out, data->ox, data->oy);
	screen_draw_move(&ctx, 0, 0);
	input_store_one(c->out, CODE_DELETELINE, ny);
	for (i = 0; i < ny; i++)
	screen_draw_line(&ctx, screen_last_y(s) - i);
	window_copy_draw_position(w, &ctx);
	screen_draw_stop(&ctx);

	size = BUFFER_USED(c->out) - size;
	hdr.type = MSG_DATA;
	hdr.size = size;
	memcpy(BUFFER_IN(c->out) - size - sizeof hdr, &hdr, sizeof hdr);
	}
	}

	void
	window_copy_scroll_down(struct window *w, u_int ny)
	{
	struct window_copy_mode_data *data = w->modedata;
	struct screen *s = &w->screen;
	struct screen_draw_ctx ctx;
	struct client *c;
	u_int i;
	struct hdr hdr;
	size_t size;

	if (data->oy >= data->size - ny)
	ny = data->size - data->oy;
	if (ny == 0)
	return;
	data->oy += ny;

	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
	c = ARRAY_ITEM(&clients, i);
	if (c == NULL \|\| c->session == NULL)
	continue;
	if (!session_has(c->session, w))
	continue;

	buffer_ensure(c->out, sizeof hdr);
	buffer_add(c->out, sizeof hdr);
	size = BUFFER_USED(c->out);

	screen_draw_start(&ctx, s, c->out, data->ox, data->oy);
	screen_draw_move(&ctx, 0, 0);
	input_store_one(c->out, CODE_INSERTLINE, ny);
	for (i = 1; i < ny + 1; i++)
	screen_draw_line(&ctx, i);
	window_copy_draw_position(w, &ctx);
	screen_draw_stop(&ctx);

	size = BUFFER_USED(c->out) - size;
	hdr.type = MSG_DATA;
	hdr.size = size;
	memcpy(BUFFER_IN(c->out) - size - sizeof hdr, &hdr, sizeof hdr);
	}
	}