627 lines
16 KiB
C
627 lines
16 KiB
C
/* terminfo.c - simple terminfo module */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2003,2004,2005,2007 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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/*
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* This file contains various functions dealing with different
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* terminal capabilities. For example, vt52 and vt100.
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*/
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#include <grub/types.h>
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#include <grub/misc.h>
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#include <grub/mm.h>
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#include <grub/err.h>
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#include <grub/dl.h>
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#include <grub/term.h>
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#include <grub/terminfo.h>
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#include <grub/tparm.h>
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#include <grub/command.h>
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#include <grub/i18n.h>
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#include <grub/time.h>
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static struct grub_term_output *terminfo_outputs;
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/* Get current terminfo name. */
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char *
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grub_terminfo_get_current (struct grub_term_output *term)
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{
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struct grub_terminfo_output_state *data
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= (struct grub_terminfo_output_state *) term->data;
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return data->name;
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}
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/* Free *PTR and set *PTR to NULL, to prevent double-free. */
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static void
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grub_terminfo_free (char **ptr)
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{
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grub_free (*ptr);
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*ptr = 0;
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}
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static void
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grub_terminfo_all_free (struct grub_term_output *term)
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{
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struct grub_terminfo_output_state *data
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= (struct grub_terminfo_output_state *) term->data;
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/* Free previously allocated memory. */
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grub_terminfo_free (&data->name);
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grub_terminfo_free (&data->gotoxy);
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grub_terminfo_free (&data->cls);
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grub_terminfo_free (&data->reverse_video_on);
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grub_terminfo_free (&data->reverse_video_off);
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grub_terminfo_free (&data->cursor_on);
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grub_terminfo_free (&data->cursor_off);
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}
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/* Set current terminfo type. */
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grub_err_t
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grub_terminfo_set_current (struct grub_term_output *term,
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const char *str)
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{
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struct grub_terminfo_output_state *data
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= (struct grub_terminfo_output_state *) term->data;
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/* TODO
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* Lookup user specified terminfo type. If found, set term variables
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* as appropriate. Otherwise return an error.
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*
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* How should this be done?
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* a. A static table included in this module.
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* - I do not like this idea.
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* b. A table stored in the configuration directory.
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* - Users must convert their terminfo settings if we have not already.
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* c. Look for terminfo files in the configuration directory.
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* - /usr/share/terminfo is 6.3M on my system.
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* - /usr/share/terminfo is not on most users boot partition.
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* + Copying the terminfo files you want to use to the grub
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* configuration directory is easier then (b).
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* d. Your idea here.
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*/
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grub_terminfo_all_free (term);
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if (grub_strcmp ("vt100", str) == 0)
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{
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data->name = grub_strdup ("vt100");
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data->gotoxy = grub_strdup ("\e[%i%p1%d;%p2%dH");
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data->cls = grub_strdup ("\e[H\e[J");
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data->reverse_video_on = grub_strdup ("\e[7m");
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data->reverse_video_off = grub_strdup ("\e[m");
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data->cursor_on = grub_strdup ("\e[?25h");
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data->cursor_off = grub_strdup ("\e[?25l");
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data->setcolor = NULL;
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return grub_errno;
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}
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if (grub_strcmp ("vt100-color", str) == 0)
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{
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data->name = grub_strdup ("vt100-color");
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data->gotoxy = grub_strdup ("\e[%i%p1%d;%p2%dH");
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data->cls = grub_strdup ("\e[H\e[J");
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data->reverse_video_on = grub_strdup ("\e[7m");
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data->reverse_video_off = grub_strdup ("\e[m");
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data->cursor_on = grub_strdup ("\e[?25h");
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data->cursor_off = grub_strdup ("\e[?25l");
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data->setcolor = grub_strdup ("\e[3%p1%dm\e[4%p2%dm");
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return grub_errno;
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}
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if (grub_strcmp ("ieee1275", str) == 0)
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{
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data->name = grub_strdup ("ieee1275");
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data->gotoxy = grub_strdup ("\e[%i%p1%d;%p2%dH");
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/* Clear the screen. Using serial console, screen(1) only recognizes the
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* ANSI escape sequence. Using video console, Apple Open Firmware
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* (version 3.1.1) only recognizes the literal ^L. So use both. */
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data->cls = grub_strdup (" \e[2J");
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data->reverse_video_on = grub_strdup ("\e[7m");
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data->reverse_video_off = grub_strdup ("\e[m");
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data->cursor_on = grub_strdup ("\e[?25h");
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data->cursor_off = grub_strdup ("\e[?25l");
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data->setcolor = grub_strdup ("\e[3%p1%dm\e[4%p2%dm");
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return grub_errno;
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}
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if (grub_strcmp ("dumb", str) == 0)
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{
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data->name = grub_strdup ("dumb");
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data->gotoxy = NULL;
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data->cls = NULL;
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data->reverse_video_on = NULL;
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data->reverse_video_off = NULL;
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data->cursor_on = NULL;
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data->cursor_off = NULL;
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data->setcolor = NULL;
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return grub_errno;
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}
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "unknown terminfo type");
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}
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grub_err_t
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grub_terminfo_output_register (struct grub_term_output *term,
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const char *type)
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{
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grub_err_t err;
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struct grub_terminfo_output_state *data;
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err = grub_terminfo_set_current (term, type);
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if (err)
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return err;
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data = (struct grub_terminfo_output_state *) term->data;
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data->next = terminfo_outputs;
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terminfo_outputs = term;
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return GRUB_ERR_NONE;
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}
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grub_err_t
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grub_terminfo_output_unregister (struct grub_term_output *term)
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{
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struct grub_term_output **ptr;
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for (ptr = &terminfo_outputs; *ptr;
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ptr = &((struct grub_terminfo_output_state *) (*ptr)->data)->next)
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if (*ptr == term)
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{
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grub_terminfo_all_free (term);
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*ptr = ((struct grub_terminfo_output_state *) (*ptr)->data)->next;
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return GRUB_ERR_NONE;
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}
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "terminal not found");
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}
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/* Wrapper for grub_putchar to write strings. */
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static void
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putstr (struct grub_term_output *term, const char *str)
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{
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struct grub_terminfo_output_state *data
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= (struct grub_terminfo_output_state *) term->data;
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while (*str)
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data->put (*str++);
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}
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grub_uint16_t
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grub_terminfo_getxy (struct grub_term_output *term)
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{
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struct grub_terminfo_output_state *data
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= (struct grub_terminfo_output_state *) term->data;
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return ((data->xpos << 8) | data->ypos);
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}
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void
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grub_terminfo_gotoxy (struct grub_term_output *term,
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grub_uint8_t x, grub_uint8_t y)
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{
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struct grub_terminfo_output_state *data
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= (struct grub_terminfo_output_state *) term->data;
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if (x > grub_term_width (term) || y > grub_term_height (term))
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{
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grub_error (GRUB_ERR_OUT_OF_RANGE, "invalid point (%u,%u)", x, y);
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return;
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}
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if (data->gotoxy)
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putstr (term, grub_terminfo_tparm (data->gotoxy, y, x));
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else
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{
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if ((y == data->ypos) && (x == data->xpos - 1))
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data->put ('\b');
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}
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data->xpos = x;
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data->ypos = y;
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}
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/* Clear the screen. */
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void
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grub_terminfo_cls (struct grub_term_output *term)
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{
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struct grub_terminfo_output_state *data
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= (struct grub_terminfo_output_state *) term->data;
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putstr (term, grub_terminfo_tparm (data->cls));
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data->xpos = data->ypos = 0;
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}
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void
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grub_terminfo_setcolorstate (struct grub_term_output *term,
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const grub_term_color_state state)
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{
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struct grub_terminfo_output_state *data
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= (struct grub_terminfo_output_state *) term->data;
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if (data->setcolor)
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{
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int fg;
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int bg;
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/* Map from VGA to terminal colors. */
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const int colormap[8]
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= { 0, /* Black. */
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4, /* Blue. */
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2, /* Green. */
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6, /* Cyan. */
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1, /* Red. */
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5, /* Magenta. */
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3, /* Yellow. */
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7, /* White. */
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};
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switch (state)
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{
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case GRUB_TERM_COLOR_STANDARD:
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case GRUB_TERM_COLOR_NORMAL:
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fg = term->normal_color & 0x0f;
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bg = term->normal_color >> 4;
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break;
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case GRUB_TERM_COLOR_HIGHLIGHT:
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fg = term->highlight_color & 0x0f;
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bg = term->highlight_color >> 4;
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break;
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default:
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return;
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}
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putstr (term, grub_terminfo_tparm (data->setcolor, colormap[fg & 7],
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colormap[bg & 7]));
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return;
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}
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switch (state)
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{
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case GRUB_TERM_COLOR_STANDARD:
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case GRUB_TERM_COLOR_NORMAL:
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putstr (term, grub_terminfo_tparm (data->reverse_video_off));
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break;
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case GRUB_TERM_COLOR_HIGHLIGHT:
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putstr (term, grub_terminfo_tparm (data->reverse_video_on));
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break;
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default:
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break;
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}
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}
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void
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grub_terminfo_setcursor (struct grub_term_output *term, const int on)
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{
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struct grub_terminfo_output_state *data
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= (struct grub_terminfo_output_state *) term->data;
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if (on)
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putstr (term, grub_terminfo_tparm (data->cursor_on));
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else
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putstr (term, grub_terminfo_tparm (data->cursor_off));
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}
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/* The terminfo version of putchar. */
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void
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grub_terminfo_putchar (struct grub_term_output *term,
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const struct grub_unicode_glyph *c)
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{
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struct grub_terminfo_output_state *data
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= (struct grub_terminfo_output_state *) term->data;
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/* Keep track of the cursor. */
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switch (c->base)
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{
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case '\a':
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break;
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case '\b':
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case 127:
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if (data->xpos > 0)
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data->xpos--;
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break;
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case '\n':
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if (data->ypos < grub_term_height (term) - 1)
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data->ypos++;
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break;
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case '\r':
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data->xpos = 0;
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break;
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default:
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if (data->xpos + c->estimated_width >= grub_term_width (term) + 1)
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{
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data->xpos = 0;
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if (data->ypos < grub_term_height (term) - 1)
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data->ypos++;
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data->put ('\r');
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data->put ('\n');
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}
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data->xpos += c->estimated_width;
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break;
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}
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data->put (c->base);
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}
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#define ANSI_C0 0x9b
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static void
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grub_terminfo_readkey (int *keys, int *len, int (*readkey) (void))
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{
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int c;
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#define CONTINUE_READ \
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{ \
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grub_uint64_t start; \
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/* On 9600 we have to wait up to 12 milliseconds. */ \
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start = grub_get_time_ms (); \
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do \
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c = readkey (); \
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while (c == -1 && grub_get_time_ms () - start < 12); \
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if (c == -1) \
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return; \
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\
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keys[*len] = c; \
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(*len)++; \
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}
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c = readkey ();
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if (c < 0)
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{
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*len = 0;
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return;
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}
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*len = 1;
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keys[0] = c;
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if (c != ANSI_C0 && c != '\e')
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{
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/* Backspace: Ctrl-h. */
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if (c == 0x7f)
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c = '\b';
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*len = 1;
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keys[0] = c;
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return;
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}
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{
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static struct
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{
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char key;
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char ascii;
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}
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three_code_table[] =
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{
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{'4', GRUB_TERM_DC},
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{'A', GRUB_TERM_UP},
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{'B', GRUB_TERM_DOWN},
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{'C', GRUB_TERM_RIGHT},
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{'D', GRUB_TERM_LEFT},
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{'F', GRUB_TERM_END},
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{'H', GRUB_TERM_HOME},
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{'K', GRUB_TERM_END},
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{'P', GRUB_TERM_DC},
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{'?', GRUB_TERM_PPAGE},
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{'/', GRUB_TERM_NPAGE}
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};
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static struct
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{
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char key;
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char ascii;
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}
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four_code_table[] =
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{
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{'1', GRUB_TERM_HOME},
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{'3', GRUB_TERM_DC},
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{'5', GRUB_TERM_PPAGE},
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{'6', GRUB_TERM_NPAGE}
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};
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unsigned i;
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if (c == '\e')
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{
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CONTINUE_READ;
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if (c != '[')
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return;
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}
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CONTINUE_READ;
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for (i = 0; i < ARRAY_SIZE (three_code_table); i++)
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if (three_code_table[i].key == c)
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{
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keys[0] = three_code_table[i].ascii;
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*len = 1;
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return;
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}
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for (i = 0; i < ARRAY_SIZE (four_code_table); i++)
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if (four_code_table[i].key == c)
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{
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CONTINUE_READ;
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if (c != '~')
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return;
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keys[0] = three_code_table[i].ascii;
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*len = 1;
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return;
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}
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return;
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}
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#undef CONTINUE_READ
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}
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/* The terminfo version of checkkey. */
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int
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grub_terminfo_checkkey (struct grub_term_input *termi)
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{
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struct grub_terminfo_input_state *data
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= (struct grub_terminfo_input_state *) (termi->data);
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if (data->npending)
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return data->input_buf[0];
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grub_terminfo_readkey (data->input_buf, &data->npending, data->readkey);
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if (data->npending)
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return data->input_buf[0];
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return -1;
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}
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/* The terminfo version of getkey. */
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int
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grub_terminfo_getkey (struct grub_term_input *termi)
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{
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struct grub_terminfo_input_state *data
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= (struct grub_terminfo_input_state *) (termi->data);
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int ret;
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while (! data->npending)
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grub_terminfo_readkey (data->input_buf, &data->npending, data->readkey);
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ret = data->input_buf[0];
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data->npending--;
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grub_memmove (data->input_buf, data->input_buf + 1, data->npending);
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return ret;
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}
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grub_err_t
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grub_terminfo_input_init (struct grub_term_input *termi)
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{
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struct grub_terminfo_input_state *data
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= (struct grub_terminfo_input_state *) (termi->data);
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data->npending = 0;
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return GRUB_ERR_NONE;
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}
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/* GRUB Command. */
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static grub_err_t
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print_terminfo (void)
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{
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const char *encoding_names[(GRUB_TERM_CODE_TYPE_MASK
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>> GRUB_TERM_CODE_TYPE_SHIFT) + 1]
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= {
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/* VGA and glyph descriptor types are just for completeness,
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they are not used on terminfo terminals.
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*/
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[GRUB_TERM_CODE_TYPE_ASCII >> GRUB_TERM_CODE_TYPE_SHIFT] = _("ASCII"),
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[GRUB_TERM_CODE_TYPE_VGA >> GRUB_TERM_CODE_TYPE_SHIFT] = "VGA",
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[GRUB_TERM_CODE_TYPE_UTF8_LOGICAL >> GRUB_TERM_CODE_TYPE_SHIFT]
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= _("UTF-8"),
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[GRUB_TERM_CODE_TYPE_UTF8_VISUAL >> GRUB_TERM_CODE_TYPE_SHIFT]
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= _("UTF-8 visual"),
|
||
[GRUB_TERM_CODE_TYPE_VISUAL_GLYPHS >> GRUB_TERM_CODE_TYPE_SHIFT]
|
||
= "Glyph descriptors",
|
||
_("Unknown"), _("Unknown"), _("Unknown")
|
||
};
|
||
struct grub_term_output *cur;
|
||
|
||
grub_printf ("Current terminfo types: \n");
|
||
for (cur = terminfo_outputs; cur;
|
||
cur = ((struct grub_terminfo_output_state *) cur->data)->next)
|
||
grub_printf ("%s: %s\t%s\n", cur->name,
|
||
grub_terminfo_get_current(cur),
|
||
encoding_names[(cur->flags & GRUB_TERM_CODE_TYPE_MASK)
|
||
>> GRUB_TERM_CODE_TYPE_SHIFT]);
|
||
|
||
return GRUB_ERR_NONE;
|
||
}
|
||
|
||
static grub_err_t
|
||
grub_cmd_terminfo (grub_command_t cmd __attribute__ ((unused)),
|
||
int argc, char **args)
|
||
{
|
||
struct grub_term_output *cur;
|
||
int encoding = GRUB_TERM_CODE_TYPE_ASCII;
|
||
int i;
|
||
char *name = NULL, *type = NULL;
|
||
|
||
if (argc == 0)
|
||
return print_terminfo ();
|
||
|
||
for (i = 0; i < argc; i++)
|
||
{
|
||
if (grub_strcmp (args[i], "-a") == 0
|
||
|| grub_strcmp (args[i], "--ascii") == 0)
|
||
{
|
||
encoding = GRUB_TERM_CODE_TYPE_ASCII;
|
||
continue;
|
||
}
|
||
if (grub_strcmp (args[i], "-u") == 0
|
||
|| grub_strcmp (args[i], "--utf8") == 0)
|
||
{
|
||
encoding = GRUB_TERM_CODE_TYPE_UTF8_LOGICAL;
|
||
continue;
|
||
}
|
||
if (grub_strcmp (args[i], "-v") == 0
|
||
|| grub_strcmp (args[i], "--visual-utf8") == 0)
|
||
{
|
||
encoding = GRUB_TERM_CODE_TYPE_UTF8_VISUAL;
|
||
continue;
|
||
}
|
||
if (!name)
|
||
{
|
||
name = args[i];
|
||
continue;
|
||
}
|
||
if (!type)
|
||
{
|
||
type = args[i];
|
||
continue;
|
||
}
|
||
|
||
return grub_error (GRUB_ERR_BAD_ARGUMENT, "too many parameters");
|
||
}
|
||
|
||
if (name == NULL)
|
||
return grub_error (GRUB_ERR_BAD_ARGUMENT, "too few parameters");
|
||
|
||
for (cur = terminfo_outputs; cur;
|
||
cur = ((struct grub_terminfo_output_state *) cur->data)->next)
|
||
if (grub_strcmp (name, cur->name) == 0)
|
||
{
|
||
cur->flags = (cur->flags & ~GRUB_TERM_CODE_TYPE_MASK) | encoding;
|
||
if (!type)
|
||
return GRUB_ERR_NONE;
|
||
|
||
return grub_terminfo_set_current (cur, type);
|
||
}
|
||
return grub_error (GRUB_ERR_BAD_ARGUMENT,
|
||
"no terminal %s found or it's not handled by terminfo",
|
||
name);
|
||
}
|
||
|
||
static grub_command_t cmd;
|
||
|
||
GRUB_MOD_INIT(terminfo)
|
||
{
|
||
cmd = grub_register_command ("terminfo", grub_cmd_terminfo,
|
||
N_("[[-a|-u|-v] TERM [TYPE]]"),
|
||
N_("Set terminfo type of TERM to TYPE.\n"
|
||
"-a, --ascii Terminal is ASCII-only [default].\n"
|
||
"-u, --utf8 Terminal is logical-ordered UTF-8.\n"
|
||
"-v, --visual-utf8 Terminal is visually-ordered UTF-8.")
|
||
|
||
);
|
||
}
|
||
|
||
GRUB_MOD_FINI(terminfo)
|
||
{
|
||
grub_unregister_command (cmd);
|
||
}
|