This adds dummy modes for all available DEC/ANSI modes. This does not
actually implement them but adds support for SM/RM CSI sequences.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
SM/RM - SetMode/ResetMode are used to explicitely set terminal modes. DEC
private modes and ANSI modes are separated as defined by VT220.
We currently only parse modes that we actually support. Further modes may
follow.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Both escape sequences are used to change the C1 escape character mode from
using 8bit or 7bit escape codes/sequences.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
We currently do not support sending C1 controls as 8bit characters because
this doesn't make any sense with UTF-8. However, in 7bit/8bit
compatibility mode the client can request this. As nearly all clients are
backwards compatible to VT100 they also support C1 controls as 7bit
sequences, though, so there is really no time pressure to implement
FLAG_USE_C1.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This allows changing GL and GR to the values set in G0-G3. GL can also be
set temporarily, GR currently does not have such a mode.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
With ESC {int} {final} you can designate G0-G3. If no {int} is given, we
fall back to the default escape sequences that replace the C1 set.
However, the user might designate other sets manually so we ignore all
escape sequences that have intermediates set.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
All three flags are most often used with basic escape sequences and not
with CSI sequences, however, we treat them generic here to avoid more
complexity.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Temporary charsets are only used for the next graphics character that is
displayed. After that, the VTE returns to the previous charset. On
soft-reset we also reset these temporary slots.
This also adds the g0-g3 backend slots that can be set by the client and
allow mapping of arbitrary other charsets into gl/gr/glr/grt.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Instead of copying all that initialization stuff around, we simply perform
a soft reset on initialization.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Even though modern keyboard often do not include such keys, we should
handle them correctly, anyway. For the sake of backwards-compatibility.
This also comes in handy if you define these keys separately. The
functions that are implemented by many applications with these keys are
handy, indeed.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
We now select the 8bit/7bit modes if the client sends an DECSCL requesting
a conformance level.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Correctly select CSI flags like ?, !, > or $ and more. We actually don't
care about the position of these flags as other CSI parameters are just
digits.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This performs a soft reset of the VTE state machine. It does not affect
the console that is bound to the VTE, though.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
In 7bit and 8bit modes we treat incoming characters as single-byte
characters and map them directly to the corresponding value instead of
using the UTF8 state-machine.
This allows using old non-utf8 applications with this VT. However, default
value is still UTF8-mode and you must explicitely request a conformance
level to change that. If you selected such a mode once, you can only
return to UTF8-mode by performing a soft/hard-reset.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This dummy is supposed to hard-reset the console. As the console is far
from finished, we keep it as dummy and implement this later.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Sometimes we need to reset the UTF8 state-machine, for instance when
resetting the VTE. This function simply resets the internal state to
KMSCON_UTF8_START so we start all over on the next input character.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
We build several internal libraries and to keep the namespaces apart we
also need different debug constants. Therefore, introduce the new
KMSCON_ENABLE_DEBUG constant which is for every debug object in base
kmscon code.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Since vt100 (and extended with vt220) you can load different character
sets into GL and GR. As we use UTF-8 as base encoding, we actually do not
need them but have to support it for backwards compatibility. For further
information, see the comments in vte_charsets.c.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
DECSCL is used to select compatibility modes. We do not support the VT100
compatibility mode explicitely or the VT220 mode, however, we always send
7-bit control characters and support escape sequences from both series so
we can safely ignore DECSCL.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
When receiving SUB we now correctly write a reversed question mark into
the buffer. We still cancel the ongoing escape sequence, this worked even
without this patch.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This function is not needed at all. Instead, we should simply move one
character to the left on incoming backspace. There is no need to handle
auto-wrap on backspace.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Other emulators might ignore this. However, the easiest way to answer to
an enquiry is probably ACK.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
VTE now requires a new callback that is called when we want to send
messages to the pty etc. This is needed if we want to send messages as
responses to incoming data. Otherwise, we would have way too much overhead
assembling composed messages.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
The VT220 defines some additional shortcuts to send escape codes with
ctrl+<num>. Implement these as aliases to the same well-defined shortcuts.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
F1-F4 are mapped to the keypad keys as these keys were not available on
VT220. F5 is special mapped and F6-F20 correspond to the same keys on the
keyboards for VT220.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
In line-feed/new-line mode the NL/.. codes generate a CR *and* a NL.
Otherwise, they only generate CRs.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
In cursor-key-mode reset we send the normal CSI sequences, again encoded
with C0 codes as C1 codes are nonsense in UTF8. In cursor-key-mode set we
use the SS3 codes instead.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Implement the basic editing keys that are used by several applications. We
use the 7bit CSI sequence to avoid UTF8 issues. Otherwise, we would have
to encode the C1 CSI 0x9b as UTF8 character which is also a 2 byte
sequence.
Besides INSERT, DELETE, PAGEUP and PAGEDOWN an VT220 also had SELECT and
FIND keys which we do not implement as they are not present on modern
keyboards.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This adds support for colored and bold characters. This also adds the
infrastrucure for background colors and underlined characters, however,
these are not properly implemented, yet.
The color codes are similar to xterm and optimized on black backgrounds.
So they are not too bright or shiny.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This is a convenient macro to check whether a given set of modifiers is
enabled on the given input event.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Print keysym even if we have a UCS4 representation. This makes debugging
keyboard issues much easier. Also increase buffer size to 32 as there are
many symbols longer than 16 characters.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Bind the console at vte creation instead of dynamically during runtime.
There is no need to rebind a console so remove this complexity.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
We now have a video device for each seat so we only need to launch the UI
when the video device is registered.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
We need to correctly increase the refcnt. We currently increase it only
when it was 0 before due to a very subtle bug as we missed the "return".
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This is a small regression whereby starting kmscon with e.g. Caps Lock
already on, will not be reflected in the modifier mask. It's not
currently possible with xkbcommon.
Signed-off-by: Ran Benita <ran234@gmail.com>
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Use the new API in kbd_dev_process_key.
This introduces a regression whereby repeating key events are sent for
modifier keys. This is a currently a limitation in xkbcommon.
Signed-off-by: Ran Benita <ran234@gmail.com>
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
The new xkb types correspond quite closely to our own types, which now
become thin wrappers.
Signed-off-by: Ran Benita <ran234@gmail.com>
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
