129 lines
2.9 KiB
C
129 lines
2.9 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2002,2003,2005,2007,2008,2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/term.h>
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#include <grub/misc.h>
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#include <grub/mm.h>
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/* The amount of lines counted by the pager. */
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static unsigned grub_more_lines;
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/* If the more pager is active. */
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static int grub_more;
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static void
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process_newline (void)
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{
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struct grub_term_output *cur;
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unsigned height = -1;
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FOR_ACTIVE_TERM_OUTPUTS(cur)
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if (grub_term_height (cur) < height)
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height = grub_term_height (cur);
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grub_more_lines++;
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if (grub_more && grub_more_lines == height - 1)
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{
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char key;
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grub_uint16_t *pos;
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pos = grub_term_save_pos ();
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grub_setcolorstate (GRUB_TERM_COLOR_HIGHLIGHT);
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grub_printf ("--MORE--");
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grub_setcolorstate (GRUB_TERM_COLOR_STANDARD);
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key = grub_getkey ();
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/* Remove the message. */
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grub_term_restore_pos (pos);
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grub_printf (" ");
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grub_term_restore_pos (pos);
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/* Scroll one lines or an entire page, depending on the key. */
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if (key == '\r' || key =='\n')
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grub_more_lines--;
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else
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grub_more_lines = 0;
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}
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}
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void
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grub_set_more (int onoff)
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{
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if (onoff == 1)
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grub_more++;
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else
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grub_more--;
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grub_more_lines = 0;
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grub_newline_hook = process_newline;
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}
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void
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grub_puts_terminal (const char *str, struct grub_term_output *term)
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{
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grub_uint32_t code;
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grub_ssize_t ret;
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const grub_uint8_t *ptr = (const grub_uint8_t *) str;
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const grub_uint8_t *end;
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end = (const grub_uint8_t *) (str + grub_strlen (str));
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while (*ptr)
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{
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ret = grub_utf8_to_ucs4 (&code, 1, ptr, end - ptr, &ptr);
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grub_putcode (code, term);
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}
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}
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grub_uint16_t *
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grub_term_save_pos (void)
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{
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struct grub_term_output *cur;
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unsigned cnt = 0;
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grub_uint16_t *ret, *ptr;
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FOR_ACTIVE_TERM_OUTPUTS(cur)
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cnt++;
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ret = grub_malloc (cnt * sizeof (ret[0]));
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if (!ret)
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return NULL;
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ptr = ret;
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FOR_ACTIVE_TERM_OUTPUTS(cur)
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*ptr++ = grub_term_getxy (cur);
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return ret;
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}
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void
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grub_term_restore_pos (grub_uint16_t *pos)
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{
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struct grub_term_output *cur;
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grub_uint16_t *ptr = pos;
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if (!pos)
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return;
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FOR_ACTIVE_TERM_OUTPUTS(cur)
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{
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grub_term_gotoxy (cur, (*ptr & 0xff00) >> 8, *ptr & 0xff);
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ptr++;
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}
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}
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