tmux/window-scroll.c

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/* $Id: window-scroll.c,v 1.16 2007-12-06 10:04:43 nicm Exp $ */
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/*
* 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>
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#include <string.h>
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#include "tmux.h"
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struct screen *window_scroll_init(struct window *);
void window_scroll_free(struct window *);
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void window_scroll_resize(struct window *, u_int, u_int);
void window_scroll_key(struct window *, int);
void window_scroll_redraw_screen(struct window *);
void window_scroll_write_line(
struct window *, struct screen_write_ctx *, u_int);
void window_scroll_write_column(
struct window *, struct screen_write_ctx *, u_int);
void window_scroll_scroll_up(struct window *);
void window_scroll_scroll_down(struct window *);
void window_scroll_scroll_left(struct window *);
void window_scroll_scroll_right(struct window *);
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const struct window_mode window_scroll_mode = {
window_scroll_init,
window_scroll_free,
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window_scroll_resize,
window_scroll_key
};
struct window_scroll_mode_data {
struct screen screen;
u_int ox;
u_int oy;
};
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struct screen *
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window_scroll_init(struct window *w)
{
struct window_scroll_mode_data *data;
struct screen *s;
struct screen_write_ctx ctx;
u_int i;
w->modedata = data = xmalloc(sizeof *data);
data->ox = 0;
data->oy = 0;
s = &data->screen;
screen_create(s, screen_size_x(&w->base), screen_size_y(&w->base));
s->mode = 0;
screen_write_start(&ctx, s, NULL, NULL);
for (i = 0; i < screen_size_y(s); i++)
window_scroll_write_line(w, &ctx, i);
screen_write_stop(&ctx);
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return (s);
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}
void
window_scroll_free(struct window *w)
{
struct window_scroll_mode_data *data = w->modedata;
screen_destroy(&data->screen);
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xfree(data);
}
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void
window_scroll_resize(struct window *w, u_int sx, u_int sy)
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{
struct window_scroll_mode_data *data = w->modedata;
struct screen *s = &data->screen;
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screen_resize(s, sx, sy);
screen_display_copy_area(&data->screen, &w->base,
0, 0, screen_size_x(s), screen_size_y(s), data->ox, data->oy);
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}
void
window_scroll_key(struct window *w, int key)
{
struct window_scroll_mode_data *data = w->modedata;
struct screen *s = &data->screen;
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switch (key) {
case 'Q':
case 'q':
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window_reset_mode(w);
break;
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case 'h':
case KEYC_LEFT:
window_scroll_scroll_left(w);
break;
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case 'l':
case KEYC_RIGHT:
window_scroll_scroll_right(w);
break;
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case 'k':
case 'K':
case KEYC_UP:
window_scroll_scroll_up(w);
break;
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case 'j':
case 'J':
case KEYC_DOWN:
window_scroll_scroll_down(w);
break;
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case '\025': /* C-u */
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case KEYC_PPAGE:
if (data->oy + screen_size_y(s) > w->base.hsize)
data->oy = w->base.hsize;
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else
data->oy += screen_size_y(s);
window_scroll_redraw_screen(w);
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break;
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case '\006': /* C-f */
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case KEYC_NPAGE:
if (data->oy < screen_size_y(s))
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data->oy = 0;
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else
data->oy -= screen_size_y(s);
window_scroll_redraw_screen(w);
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break;
}
}
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void
window_scroll_write_line(
struct window *w, struct screen_write_ctx *ctx, u_int py)
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{
struct window_scroll_mode_data *data = w->modedata;
struct screen *s = &data->screen;
size_t size;
if (py == 0) {
screen_write_set_attributes(ctx, 0, status_colour);
screen_write_move_cursor(ctx, 0, 0);
size = screen_write_put_string_rjust(
ctx, "[%u,%u/%u]", data->ox, data->oy, w->base.hsize);
} else
size = 0;
screen_write_move_cursor(ctx, 0, py);
screen_write_copy_area(
ctx, &w->base, screen_size_x(s) - size, 1, data->ox, data->oy);
}
void
window_scroll_write_column(
struct window *w, struct screen_write_ctx *ctx, u_int px)
{
struct window_scroll_mode_data *data = w->modedata;
struct screen *s = &data->screen;
screen_write_move_cursor(ctx, px, 0);
screen_write_copy_area(
ctx, &w->base, 1, screen_size_y(s), data->ox, data->oy);
}
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void
window_scroll_redraw_screen(struct window *w)
{
struct window_scroll_mode_data *data = w->modedata;
struct screen *s = &data->screen;
struct screen_write_ctx ctx;
u_int i;
screen_write_start_window(&ctx, w);
for (i = 0; i < screen_size_y(s); i++)
window_scroll_write_line(w, &ctx, i);
screen_write_stop(&ctx);
}
void
window_scroll_scroll_up(struct window *w)
{
struct window_scroll_mode_data *data = w->modedata;
struct screen_write_ctx ctx;
if (data->oy >= w->base.hsize)
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return;
data->oy++;
screen_write_start_window(&ctx, w);
screen_write_move_cursor(&ctx, 0, 0);
screen_write_insert_lines(&ctx, 1);
window_scroll_write_line(w, &ctx, 0);
window_scroll_write_line(w, &ctx, 1);
screen_write_stop(&ctx);
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}
void
window_scroll_scroll_down(struct window *w)
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{
struct window_scroll_mode_data *data = w->modedata;
struct screen *s = &data->screen;
struct screen_write_ctx ctx;
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if (data->oy == 0)
return;
data->oy--;
screen_write_start_window(&ctx, w);
screen_write_move_cursor(&ctx, 0, 0);
screen_write_delete_lines(&ctx, 1);
window_scroll_write_line(w, &ctx, screen_last_y(s));
window_scroll_write_line(w, &ctx, 0);
screen_write_stop(&ctx);
}
void
window_scroll_scroll_right(struct window *w)
{
struct window_scroll_mode_data *data = w->modedata;
struct screen *s = &data->screen;
struct screen_write_ctx ctx;
u_int i;
if (data->ox >= SHRT_MAX)
return;
data->ox++;
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screen_write_start_window(&ctx, w);
for (i = 1; i < screen_size_y(s); i++) {
screen_write_move_cursor(&ctx, 0, i);
screen_write_delete_characters(&ctx, 1);
}
window_scroll_write_column(w, &ctx, screen_last_x(s));
window_scroll_write_line(w, &ctx, 0);
screen_write_stop(&ctx);
}
void
window_scroll_scroll_left(struct window *w)
{
struct window_scroll_mode_data *data = w->modedata;
struct screen *s = &data->screen;
struct screen_write_ctx ctx;
u_int i;
if (data->ox == 0)
return;
data->ox--;
screen_write_start_window(&ctx, w);
for (i = 1; i < screen_size_y(s); i++) {
screen_write_move_cursor(&ctx, 0, i);
screen_write_insert_characters(&ctx, 1);
}
window_scroll_write_column(w, &ctx, 0);
window_scroll_write_line(w, &ctx, 0);
screen_write_stop(&ctx);
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}