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/*
* Copyright (C) 2013 IBM Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif
#include <string.h>
#include <talloc/talloc.h>
#include <types/types.h>
#include <log/log.h>
#include <fold/fold.h>
#include <util/util.h>
#include <i18n/i18n.h>
#include "nc-cui.h"
#include "nc-textscreen.h"
struct text_screen *text_screen_from_scr(struct nc_scr *scr)
{
struct text_screen *text_screen;
assert(scr->sig == pb_text_screen_sig);
text_screen = container_of(scr, struct text_screen, scr);
return text_screen;
}
void text_screen_draw(struct text_screen *screen)
{
int max_y, i;
max_y = getmaxy(screen->scr.sub_ncw);
max_y = min(max_y, screen->scroll_y + screen->n_lines);
for (i = screen->scroll_y; i < max_y; i++)
mvwaddstr(screen->scr.sub_ncw, i, 1, screen->lines[i]);
wrefresh(screen->scr.sub_ncw);
}
static void text_screen_scroll(struct text_screen *screen, int key)
{
int win_lines = getmaxy(screen->scr.sub_ncw);
int delta;
if (key == KEY_UP)
delta = -1;
else if (key == KEY_DOWN)
delta = 1;
else
return;
if (screen->scroll_y + delta < 0)
return;
if (screen->scroll_y + delta + win_lines > screen->n_lines)
return;
screen->scroll_y += delta;
wscrl(screen->scr.sub_ncw, delta);
if (delta > 0) {
mvwaddstr(screen->scr.sub_ncw, win_lines - 1, 1,
screen->lines[screen->scroll_y+win_lines-1]);
} else if (delta < 0) {
mvwaddstr(screen->scr.sub_ncw, 0, 1,
screen->lines[screen->scroll_y]);
}
wrefresh(screen->scr.sub_ncw);
}
void text_screen_clear(struct text_screen *screen)
{
talloc_free(screen->lines);
screen->n_lines = 0;
screen->n_alloc_lines = 16;
screen->lines = talloc_array(screen, const char *,
screen->n_alloc_lines);
}
static void __text_screen_append_line(struct text_screen *screen,
const char *line)
{
if (screen->n_lines == screen->n_alloc_lines) {
screen->n_alloc_lines *= 2;
screen->lines = talloc_realloc(screen, screen->lines,
const char *,
screen->n_alloc_lines);
}
screen->lines[screen->n_lines] = line;
screen->n_lines++;
}
void text_screen_append_line(struct text_screen *screen, const char *fmt, ...)
{
char *line;
va_list ap;
if (fmt) {
va_start(ap, fmt);
line = talloc_vasprintf(screen->lines, fmt, ap);
va_end(ap);
} else {
line = "";
}
__text_screen_append_line(screen, line);
}
static int text_screen_fold_cb(void *arg, const char *buf, int len)
{
struct text_screen *screen = arg;
buf = len ? talloc_strndup(screen->lines, buf, len) : "";
__text_screen_append_line(screen, buf);
return 0;
}
void text_screen_set_text(struct text_screen *screen, const char *text)
{
fold_text(text, getmaxx(screen->scr.sub_ncw), text_screen_fold_cb,
screen);
}
void text_screen_process_key(struct nc_scr *scr, int key)
{
struct text_screen *screen = text_screen_from_scr(scr);
switch (key) {
case 'x':
case 27: /* esc */
screen->on_exit(screen->cui);
break;
case KEY_DOWN:
case KEY_UP:
text_screen_scroll(screen, key);
break;
case 'h':
if (screen->help_text)
cui_show_help(screen->cui, screen->help_title,
screen->help_text);
break;
default:
break;
}
}
static void text_screen_resize(struct nc_scr *scr)
{
struct text_screen *screen = text_screen_from_scr(scr);
text_screen_draw(screen);
}
struct nc_scr *text_screen_scr(struct text_screen *screen)
{
return &screen->scr;
}
void text_screen_set_help(struct text_screen *screen, const char *title,
const struct help_text *text)
{
screen->help_title = title;
screen->help_text = text;
screen->scr.frame.help = _("x=exit, h=help");
}
static int text_screen_post(struct nc_scr *scr)
{
struct text_screen *screen = text_screen_from_scr(scr);
if (screen->need_update) {
text_screen_draw(screen);
screen->need_update = false;
}
nc_scr_frame_draw(scr);
redrawwin(scr->main_ncw);
wrefresh(scr->main_ncw);
return 0;
}
void text_screen_init(struct text_screen *screen, struct cui *cui,
const char *title, void (*on_exit)(struct cui *))
{
nc_scr_init(&screen->scr, pb_text_screen_sig, 0,
cui, text_screen_process_key,
text_screen_post, NULL, text_screen_resize);
/* this will establish our array of lines */
screen->lines = NULL;
text_screen_clear(screen);
screen->cui = cui;
screen->on_exit = on_exit;
screen->need_update = false;
screen->scr.frame.ltitle = talloc_strdup(screen, title);
screen->scr.frame.rtitle = NULL;
screen->scr.frame.help = _("x=exit");
scrollok(screen->scr.sub_ncw, true);
}
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