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/* $Id: window-scroll.c,v 1.33 2009-05-04 17:58:27 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"
struct screen *window_scroll_init(struct window_pane *);
void window_scroll_free(struct window_pane *);
void window_scroll_resize(struct window_pane *, u_int, u_int);
void window_scroll_key(struct window_pane *, struct client *, int);
void window_scroll_redraw_screen(struct window_pane *);
void window_scroll_write_line(
struct window_pane *, struct screen_write_ctx *, u_int);
void window_scroll_write_column(
struct window_pane *, struct screen_write_ctx *, u_int);
void window_scroll_scroll_up(struct window_pane *);
void window_scroll_scroll_down(struct window_pane *);
void window_scroll_scroll_left(struct window_pane *);
void window_scroll_scroll_right(struct window_pane *);
const struct window_mode window_scroll_mode = {
window_scroll_init,
window_scroll_free,
window_scroll_resize,
window_scroll_key,
NULL,
NULL,
};
struct window_scroll_mode_data {
struct screen screen;
struct mode_key_data mdata;
u_int ox;
u_int oy;
};
struct screen *
window_scroll_init(struct window_pane *wp)
{
struct window_scroll_mode_data *data;
struct screen *s;
struct screen_write_ctx ctx;
u_int i;
wp->modedata = data = xmalloc(sizeof *data);
data->ox = 0;
data->oy = 0;
s = &data->screen;
screen_init(s, screen_size_x(&wp->base), screen_size_y(&wp->base), 0);
s->mode &= ~MODE_CURSOR;
mode_key_init(&data->mdata,
options_get_number(&wp->window->options, "mode-keys"), 0);
screen_write_start(&ctx, NULL, s);
for (i = 0; i < screen_size_y(s); i++)
window_scroll_write_line(wp, &ctx, i);
screen_write_stop(&ctx);
return (s);
}
void
window_scroll_free(struct window_pane *wp)
{
struct window_scroll_mode_data *data = wp->modedata;
mode_key_free(&data->mdata);
screen_free(&data->screen);
xfree(data);
}
void
window_scroll_pageup(struct window_pane *wp)
{
struct window_scroll_mode_data *data = wp->modedata;
struct screen *s = &data->screen;
if (data->oy + screen_size_y(s) > screen_hsize(&wp->base))
data->oy = screen_hsize(&wp->base);
else
data->oy += screen_size_y(s);
window_scroll_redraw_screen(wp);
}
void
window_scroll_resize(struct window_pane *wp, u_int sx, u_int sy)
{
struct window_scroll_mode_data *data = wp->modedata;
struct screen *s = &data->screen;
struct screen_write_ctx ctx;
u_int i;
screen_resize(s, sx, sy);
screen_write_start(&ctx, NULL, s);
for (i = 0; i < screen_size_y(s); i++)
window_scroll_write_line(wp, &ctx, i);
screen_write_stop(&ctx);
}
void
window_scroll_key(struct window_pane *wp, unused struct client *c, int key)
{
struct window_scroll_mode_data *data = wp->modedata;
struct screen *s = &data->screen;
switch (mode_key_lookup(&data->mdata, key)) {
case MODEKEYCMD_QUIT:
window_pane_reset_mode(wp);
break;
case MODEKEYCMD_LEFT:
window_scroll_scroll_left(wp);
break;
case MODEKEYCMD_RIGHT:
window_scroll_scroll_right(wp);
break;
case MODEKEYCMD_UP:
window_scroll_scroll_up(wp);
break;
case MODEKEYCMD_DOWN:
window_scroll_scroll_down(wp);
break;
case MODEKEYCMD_PREVIOUSPAGE:
window_scroll_pageup(wp);
break;
case MODEKEYCMD_NEXTPAGE:
if (data->oy < screen_size_y(s))
data->oy = 0;
else
data->oy -= screen_size_y(s);
window_scroll_redraw_screen(wp);
break;
default:
break;
}
}
void
window_scroll_write_line(
struct window_pane *wp, struct screen_write_ctx *ctx, u_int py)
{
struct window_scroll_mode_data *data = wp->modedata;
struct screen *s = &data->screen;
struct grid_cell gc;
char hdr[32];
size_t size;
if (py == 0) {
memcpy(&gc, &grid_default_cell, sizeof gc);
size = xsnprintf(hdr, sizeof hdr,
"[%u,%u/%u]", data->ox, data->oy, screen_hsize(&wp->base));
gc.bg = options_get_number(&wp->window->options, "mode-fg");
gc.fg = options_get_number(&wp->window->options, "mode-bg");
gc.attr |= options_get_number(&wp->window->options, "mode-attr");
screen_write_cursormove(ctx, screen_size_x(s) - size, 0);
screen_write_puts(ctx, &gc, "%s", hdr);
memcpy(&gc, &grid_default_cell, sizeof gc);
} else
size = 0;
screen_write_cursormove(ctx, 0, py);
screen_write_copy(ctx, &wp->base, data->ox, (screen_hsize(&wp->base) -
data->oy) + py, screen_size_x(s) - size, 1);
}
void
window_scroll_write_column(
struct window_pane *wp, struct screen_write_ctx *ctx, u_int px)
{
struct window_scroll_mode_data *data = wp->modedata;
struct screen *s = &data->screen;
screen_write_cursormove(ctx, px, 0);
screen_write_copy(ctx, &wp->base, data->ox + px,
screen_hsize(&wp->base) - data->oy, 1, screen_size_y(s));
}
void
window_scroll_redraw_screen(struct window_pane *wp)
{
struct window_scroll_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_scroll_write_line(wp, &ctx, i);
screen_write_stop(&ctx);
}
void
window_scroll_scroll_up(struct window_pane *wp)
{
struct window_scroll_mode_data *data = wp->modedata;
struct screen_write_ctx ctx;
if (data->oy >= screen_hsize(&wp->base))
return;
data->oy++;
screen_write_start(&ctx, wp, NULL);
screen_write_cursormove(&ctx, 0, 0);
screen_write_insertline(&ctx, 1);
window_scroll_write_line(wp, &ctx, 0);
window_scroll_write_line(wp, &ctx, 1);
screen_write_stop(&ctx);
}
void
window_scroll_scroll_down(struct window_pane *wp)
{
struct window_scroll_mode_data *data = wp->modedata;
struct screen *s = &data->screen;
struct screen_write_ctx ctx;
if (data->oy == 0)
return;
data->oy--;
screen_write_start(&ctx, wp, NULL);
screen_write_cursormove(&ctx, 0, 0);
screen_write_deleteline(&ctx, 1);
window_scroll_write_line(wp, &ctx, screen_size_y(s) - 1);
window_scroll_write_line(wp, &ctx, 0);
screen_write_stop(&ctx);
}
void
window_scroll_scroll_right(struct window_pane *wp)
{
struct window_scroll_mode_data *data = wp->modedata;
struct screen *s = &data->screen;
struct screen_write_ctx ctx;
u_int i;
if (data->ox >= SHRT_MAX)
return;
data->ox++;
screen_write_start(&ctx, wp, NULL);
for (i = 1; i < screen_size_y(s); i++) {
screen_write_cursormove(&ctx, 0, i);
screen_write_deletecharacter(&ctx, 1);
}
window_scroll_write_column(wp, &ctx, screen_size_x(s) - 1);
window_scroll_write_line(wp, &ctx, 0);
screen_write_stop(&ctx);
}
void
window_scroll_scroll_left(struct window_pane *wp)
{
struct window_scroll_mode_data *data = wp->modedata;
struct screen *s = &data->screen;
struct screen_write_ctx ctx;
u_int i;
if (data->ox == 0)
return;
data->ox--;
screen_write_start(&ctx, wp, NULL);
for (i = 1; i < screen_size_y(s); i++) {
screen_write_cursormove(&ctx, 0, i);
screen_write_insertcharacter(&ctx, 1);
}
window_scroll_write_column(wp, &ctx, 0);
window_scroll_write_line(wp, &ctx, 0);
screen_write_stop(&ctx);
}