norohind/kmscon
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vte: implement DECSC DECRC

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DECSC is used to save the current console state. DECRC can restore the
console to a previously saved state.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This commit is contained in:
David Herrmann 2012-07-14 13:39:43 +02:00
parent 2a648c54dd
commit 0c8cb12a91
1 changed files with 82 additions and 0 deletions
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82
src/vte.c
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@ -134,6 +134,16 @@ enum parser_action {
#define FLAG_AUTO_REPEAT_MODE 0x00002000 /* Auto repeat key press; TODO: implement */
#define FLAG_NATIONAL_CHARSET_MODE 0x00004000 /* Send keys from nation charsets; TODO: implement */
struct vte_saved_state {
unsigned int cursor_x;
unsigned int cursor_y;
struct font_char_attr cattr;
kmscon_vte_charset *gl;
kmscon_vte_charset *gr;
bool wrap_mode;
bool origin_mode;
};
struct kmscon_vte {
unsigned long ref;
struct kmscon_console *con;
@ -159,6 +169,8 @@ struct kmscon_vte {
kmscon_vte_charset *g1;
kmscon_vte_charset *g2;
kmscon_vte_charset *g3;
struct vte_saved_state saved_state;
};
int kmscon_vte_new(struct kmscon_vte **out, struct kmscon_console *con,
@ -285,6 +297,66 @@ static void write_console(struct kmscon_vte *vte, kmscon_symbol_t sym)
kmscon_console_write(vte->con, sym, &vte->cattr);
}
static void reset_state(struct kmscon_vte *vte)
{
vte->saved_state.cursor_x = 0;
vte->saved_state.cursor_y = 0;
vte->saved_state.origin_mode = false;
vte->saved_state.wrap_mode = true;
vte->gl = &kmscon_vte_unicode_lower;
vte->gr = &kmscon_vte_unicode_upper;
vte->cattr.fr = 255;
vte->cattr.fg = 255;
vte->cattr.fb = 255;
vte->cattr.br = 0;
vte->cattr.bg = 0;
vte->cattr.bb = 0;
vte->cattr.bold = 0;
vte->cattr.underline = 0;
vte->cattr.inverse = 0;
}
static void save_state(struct kmscon_vte *vte)
{
vte->saved_state.cursor_x = kmscon_console_get_cursor_x(vte->con);
vte->saved_state.cursor_y = kmscon_console_get_cursor_y(vte->con);
vte->saved_state.cattr = vte->cattr;
vte->saved_state.gl = vte->gl;
vte->saved_state.gr = vte->gr;
vte->saved_state.wrap_mode = vte->flags & FLAG_AUTO_WRAP_MODE;
vte->saved_state.origin_mode = vte->flags & FLAG_ORIGIN_MODE;
}
static void restore_state(struct kmscon_vte *vte)
{
kmscon_console_move_to(vte->con, vte->saved_state.cursor_x,
vte->saved_state.cursor_y);
vte->cattr = vte->saved_state.cattr;
vte->gl = vte->saved_state.gl;
vte->gr = vte->saved_state.gr;
if (vte->saved_state.wrap_mode) {
vte->flags |= FLAG_AUTO_WRAP_MODE;
kmscon_console_set_flags(vte->con,
KMSCON_CONSOLE_AUTO_WRAP);
} else {
vte->flags &= ~FLAG_AUTO_WRAP_MODE;
kmscon_console_reset_flags(vte->con,
KMSCON_CONSOLE_AUTO_WRAP);
}
if (vte->saved_state.origin_mode) {
vte->flags |= FLAG_ORIGIN_MODE;
kmscon_console_set_flags(vte->con,
KMSCON_CONSOLE_REL_ORIGIN);
} else {
vte->flags &= ~FLAG_ORIGIN_MODE;
kmscon_console_reset_flags(vte->con,
KMSCON_CONSOLE_REL_ORIGIN);
}
}
/*
* Reset VTE state
* This performs a soft reset of the VTE. That is, everything is reset to the
@ -325,6 +397,8 @@ void kmscon_vte_reset(struct kmscon_vte *vte)
vte->cattr.underline = 0;
vte->cattr.inverse = 0;
reset_state(vte);
/* TODO: reset margins */
}
@ -689,6 +763,14 @@ static void do_esc(struct kmscon_vte *vte, uint32_t data)
case 'c': /* hard reset */
/* TODO: implement hard reset */
break;
case '7': /* DECSC */
/* save console state */
save_state(vte);
break;
case '8': /* DECRC */
/* restore console state */
restore_state(vte);
break;
default:
log_debug("unhandled escape seq %u", data);
}