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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 16:29:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 16:29:51 +0000
commit6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e (patch)
tree32451fa3cdd9321fb2591fada9891b2cb70a9cd1 /grub-core/kern/term.c
parentInitial commit. (diff)
downloadgrub2-6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e.tar.xz
grub2-6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e.zip
Adding upstream version 2.06.upstream/2.06upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'grub-core/kern/term.c')
-rw-r--r--grub-core/kern/term.c169
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);
+}