tmux/window-scroll.c

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/* $Id: window-scroll.c,v 1.14 2007-11-27 19:32:15 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"
void window_scroll_init(struct window *);
void window_scroll_resize(struct window *, u_int, u_int);
void window_scroll_draw(
struct window *, struct screen_draw_ctx *, u_int, u_int);
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void window_scroll_key(struct window *, int);
void window_scroll_draw_position(struct window *, struct screen_draw_ctx *);
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void window_scroll_up_1(struct window *);
void window_scroll_down_1(struct window *);
void window_scroll_left_1(struct window *);
void window_scroll_right_1(struct window *);
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const struct window_mode window_scroll_mode = {
window_scroll_init,
window_scroll_resize,
window_scroll_draw,
window_scroll_key
};
struct window_scroll_mode_data {
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u_int ox;
u_int oy;
u_int size;
};
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void
window_scroll_init(struct window *w)
{
struct window_scroll_mode_data *data;
w->modedata = data = xmalloc(sizeof *data);
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data->ox = data->oy = 0;
data->size = w->screen.hsize;
w->screen.mode |= MODE_BACKGROUND;
w->screen.mode &= ~MODE_BGCURSOR;
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}
void
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window_scroll_resize(unused struct window *w, unused u_int sx, unused u_int sy)
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{
}
void
window_scroll_draw_position(struct window *w, struct screen_draw_ctx *ctx)
{
struct window_scroll_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_cursor(ctx, screen_size_x(ctx->s) - len, 0);
screen_draw_set_attributes(ctx, 0, status_colour);
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screen_draw_write_string(ctx, "%s", ptr);
}
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void
window_scroll_draw(
struct window *w, struct screen_draw_ctx *ctx, u_int py, u_int ny)
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{
struct window_scroll_mode_data *data = w->modedata;
struct screen *s = &w->screen;
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if (s->hsize != data->size) {
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data->oy += s->hsize - data->size;
data->size = s->hsize;
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}
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screen_draw_set_offset(ctx, data->ox, data->oy);
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if (py != 0)
screen_draw_lines(ctx, py, ny);
else {
if (ny > 1)
screen_draw_lines(ctx, py + 1, ny - 1);
window_scroll_draw_position(w, ctx);
}
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}
void
window_scroll_key(struct window *w, int key)
{
struct window_scroll_mode_data *data = w->modedata;
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u_int ox, oy, sx, sy;
sx = screen_size_x(&w->screen);
sy = screen_size_y(&w->screen);
ox = data->ox;
oy = data->oy;
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switch (key) {
case 'Q':
case 'q':
w->mode = NULL;
xfree(w->modedata);
w->screen.mode &= ~MODE_BACKGROUND;
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recalculate_sizes();
server_redraw_window(w);
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return;
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case 'h':
case KEYC_LEFT:
window_scroll_left_1(w);
return;
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case 'l':
case KEYC_RIGHT:
window_scroll_right_1(w);
return;
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case 'k':
case 'K':
case KEYC_UP:
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window_scroll_up_1(w);
return;
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case 'j':
case 'J':
case KEYC_DOWN:
window_scroll_down_1(w);
return;
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case '\025': /* C-u */
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case KEYC_PPAGE:
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if (data->oy + sy > data->size)
data->oy = data->size;
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else
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data->oy += sy;
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break;
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case '\006': /* C-f */
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case KEYC_NPAGE:
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if (data->oy < sy)
data->oy = 0;
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else
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data->oy -= sy;
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break;
}
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if (ox != data->ox || oy != data->oy)
server_redraw_window(w);
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}
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void
window_scroll_up_1(struct window *w)
{
struct window_scroll_mode_data *data = w->modedata;
struct screen_draw_ctx ctx;
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if (data->oy >= data->size)
return;
data->oy++;
screen_draw_start_window(&ctx, w, data->ox, data->oy);
screen_draw_move_cursor(&ctx, 0, 0);
screen_draw_insert_lines(&ctx, 1);
window_scroll_draw_position(w, &ctx);
screen_draw_line(&ctx, 1);
screen_draw_stop(&ctx);
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}
void
window_scroll_down_1(struct window *w)
{
struct window_scroll_mode_data *data = w->modedata;
struct screen_draw_ctx ctx;
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if (data->oy == 0)
return;
data->oy--;
screen_draw_start_window(&ctx, w, data->ox, data->oy);
screen_draw_move_cursor(&ctx, 0, 0);
screen_draw_delete_lines(&ctx, 1);
screen_draw_line(&ctx, screen_last_y(&w->screen));
window_scroll_draw_position(w, &ctx);
screen_draw_stop(&ctx);
}
void
window_scroll_right_1(struct window *w)
{
struct window_scroll_mode_data *data = w->modedata;
struct screen_draw_ctx ctx;
u_int i;
if (data->ox >= SHRT_MAX)
return;
data->ox++;
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screen_draw_start_window(&ctx, w, data->ox, data->oy);
for (i = 1; i < screen_size_y(&w->screen); i++) {
screen_draw_move_cursor(&ctx, 0, i);
screen_draw_delete_characters(&ctx, 1);
}
screen_draw_column(&ctx, screen_last_x(&w->screen));
window_scroll_draw_position(w, &ctx);
screen_draw_stop(&ctx);
}
void
window_scroll_left_1(struct window *w)
{
struct window_scroll_mode_data *data = w->modedata;
struct screen_draw_ctx ctx;
u_int i;
if (data->ox == 0)
return;
data->ox--;
screen_draw_start_window(&ctx, w, data->ox, data->oy);
for (i = 1; i < screen_size_y(&w->screen); i++) {
screen_draw_move_cursor(&ctx, 0, i);
screen_draw_insert_characters(&ctx, 1);
}
screen_draw_column(&ctx, 0);
window_scroll_draw_position(w, &ctx);
screen_draw_stop(&ctx);
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}