diff options
Diffstat (limited to 'grub-core/kern/term.c')
| -rw-r--r-- | grub-core/kern/term.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/grub-core/kern/term.c b/grub-core/kern/term.c new file mode 100644 index 0000000..14d5964 --- /dev/null +++ b/grub-core/kern/term.c @@ -0,0 +1,169 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2002,2003,2005,2007,2008,2009 Free Software Foundation, Inc. + * + * GRUB 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, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <grub/term.h> +#include <grub/err.h> +#include <grub/mm.h> +#include <grub/misc.h> +#include <grub/env.h> +#include <grub/time.h> + +struct grub_term_output *grub_term_outputs_disabled; +struct grub_term_input *grub_term_inputs_disabled; +struct grub_term_output *grub_term_outputs; +struct grub_term_input *grub_term_inputs; + +/* Current color state. */ +grub_uint8_t grub_term_normal_color = GRUB_TERM_DEFAULT_NORMAL_COLOR; +grub_uint8_t grub_term_highlight_color = GRUB_TERM_DEFAULT_HIGHLIGHT_COLOR; + +void (*grub_term_poll_usb) (int wait_for_completion) = NULL; +void (*grub_net_poll_cards_idle) (void) = NULL; + +/* Put a Unicode character. */ +static void +grub_putcode_dumb (grub_uint32_t code, + struct grub_term_output *term) +{ + struct grub_unicode_glyph c = + { + .base = code, + .variant = 0, + .attributes = 0, + .ncomb = 0, + .estimated_width = 1 + }; + + if (code == '\t' && term->getxy) + { + int n; + + n = GRUB_TERM_TAB_WIDTH - ((term->getxy (term).x) + % GRUB_TERM_TAB_WIDTH); + while (n--) + grub_putcode_dumb (' ', term); + + return; + } + + (term->putchar) (term, &c); + if (code == '\n') + grub_putcode_dumb ('\r', term); +} + +static void +grub_xputs_dumb (const char *str) +{ + for (; *str; str++) + { + grub_term_output_t term; + grub_uint32_t code = *str; + if (code > 0x7f) + code = '?'; + + FOR_ACTIVE_TERM_OUTPUTS(term) + grub_putcode_dumb (code, term); + } +} + +void (*grub_xputs) (const char *str) = grub_xputs_dumb; + +int +grub_getkey_noblock (void) +{ + grub_term_input_t term; + + if (grub_term_poll_usb) + grub_term_poll_usb (0); + + if (grub_net_poll_cards_idle) + grub_net_poll_cards_idle (); + + FOR_ACTIVE_TERM_INPUTS(term) + { + int key = term->getkey (term); + if (key != GRUB_TERM_NO_KEY) + return key; + } + + return GRUB_TERM_NO_KEY; +} + +int +grub_getkey (void) +{ + int ret; + + grub_refresh (); + + while (1) + { + ret = grub_getkey_noblock (); + if (ret != GRUB_TERM_NO_KEY) + return ret; + grub_cpu_idle (); + } +} + +int +grub_getkeystatus (void) +{ + int status = 0; + grub_term_input_t term; + + if (grub_term_poll_usb) + grub_term_poll_usb (0); + + FOR_ACTIVE_TERM_INPUTS(term) + { + if (term->getkeystatus) + status |= term->getkeystatus (term); + } + + return status; +} + +int +grub_key_is_interrupt (int key) +{ + /* + * ESC sometimes is the BIOS setup hotkey and may be hard to discover, also + * check F4, which was chosen because is not used as a hotkey to enter the + * BIOS setup by any vendor. + */ + if (key == GRUB_TERM_ESC || key == GRUB_TERM_KEY_F4) + return 1; + + /* + * Pressing keys at the right time during boot is hard to time, also allow + * interrupting sleeps / the menu countdown by keeping shift pressed. + */ + if (grub_getkeystatus() & (GRUB_TERM_STATUS_LSHIFT | GRUB_TERM_STATUS_RSHIFT)) + return 1; + + return 0; +} + +void +grub_refresh (void) +{ + struct grub_term_output *term; + + FOR_ACTIVE_TERM_OUTPUTS(term) + grub_term_refresh (term); +} |