Commit graph

21 commits

Author SHA1 Message Date
Linus Groh
35310dbd22 LibVT: Rename escape$B to CUD (Cursor Down) 2020-01-26 15:58:06 +01:00
Linus Groh
cc73284c64 LibVT: Rename escape$A to CUU (Cursor Up) 2020-01-26 15:58:06 +01:00
Andreas Kling
8c1f2d7131 LibVT: Rename escape$K and escape$J to EL and ED respectively
We should rename all of these functions to match the real VT100 names.
This will make it 100% easier to work on LibVT.

For reference: https://vt100.net/docs/vt100-ug/
2020-01-25 20:54:40 +01:00
Andreas Kling
4ed5c13792 LibVT: Fix off-by-ones in ED (Erase in Display) and EL (Erase in Line) 2020-01-25 20:51:49 +01:00
Andreas Kling
a3069b16fd LibVT: Make backspace (BS) non-destructive
I did not realize this was a thing. This fixes an artifact in vttest.
2020-01-25 20:39:23 +01:00
Andreas Kling
dca92af431 LibVT: Support IND and RI (cursor down/up basically) 2020-01-25 20:26:35 +01:00
Andreas Kling
0d191aae13 LibVT: Rename EscapeState::ExpectBracket => GotEscape
Seems like there are many escape sequences that don't start with
brackets, so let's call the post-escape state "GotEscape" instead. :^)
2020-01-25 20:02:31 +01:00
Andreas Kling
897ad1b927 LibVT: Support NEL (Next Line)
I think this can just behave as if you sent a newline character ('\n').
2020-01-25 20:01:43 +01:00
Andreas Kling
ab77bd4c3a LibVT: Support <esc>#8 to fill screen with E's
This is apparently a "confidence test" supported by VT100.
2020-01-25 19:52:35 +01:00
Andreas Kling
25f04b06ad LibVT: Don't go into "stomp" state after moving the cursor
The curious "stomp" state occurs when you type your way all the way
over to the right side of the terminal buffer, and we "stomp" once on
the very last column, before jumping to the next line.

We should never go into "stomp" state in response to programmatically
setting the cursor position. This fixes a small artifact in vttest.
2020-01-25 19:50:23 +01:00
Andreas Kling
20e41ab381 LibVT: Support HVP (Horizontal and Vertical Position) (final 'f') 2020-01-25 19:49:42 +01:00
Andreas Kling
e6f5ce8285 LibVT: Support the DA (Device Attributes) request (final 'c')
This is used by vttest on startup to query the device for identity.
2020-01-25 19:12:08 +01:00
Andreas Kling
94ca55cefd Meta: Add license header to source files
As suggested by Joshua, this commit adds the 2-clause BSD license as a
comment block to the top of every source file.

For the first pass, I've just added myself for simplicity. I encourage
everyone to add themselves as copyright holders of any file they've
added or modified in some significant way. If I've added myself in
error somewhere, feel free to replace it with the appropriate copyright
holder instead.

Going forward, all new source files should include a license header.
2020-01-18 09:45:54 +01:00
joshua stein
5c25983844 LibVT: enforce a minimum size of 1 column and 1 row
Fixes #829
2020-01-16 12:41:09 +01:00
Andreas Kling
6f4c380d95 AK: Use size_t for the length of strings
Using int was a mistake. This patch changes String, StringImpl,
StringView and StringBuilder to use size_t instead of int for lengths.
Obviously a lot of code needs to change as a result of this.
2019-12-09 17:51:21 +01:00
Brandon Scott
194f85431f LibVT: Fixed some debugging code that didn't compile 2019-12-01 11:52:17 +01:00
Andreas Kling
5a83e053b3 LibVT: Make inject_string() a public API so clients can use it
This API allows you to add arbitrary input at the current cursor
position. You can even do escape sequences! :^)
2019-10-22 22:14:36 +02:00
Sergey Bugaev
053419dc3c Terminal: Ensure a \t always advances by at least one column 2019-09-17 21:56:42 +02:00
Andreas Kling
462336ed49 LibVT: Add scrollback history to VT::Terminal
The default (hard-coded) history size is 500 lines. When the history is
altered, the TerminalClient is notified via terminal_history_changed().
2019-08-19 19:07:52 +02:00
Andreas Kling
ca9592d56f LibVT: Shave down VT::Attribute from 8 bytes to 3 bytes
We have one of these per character in the terminal buffers, so it's a
decent haircut. :^)
2019-08-13 12:59:58 +02:00
Andreas Kling
b24b111298 LibVT: Factor out terminal emulation from Terminal to make it reusable
Now that we're bringing back the in-kernel virtual console, we should
move towards having a single implementation of terminal emulation.

This patch rips out the emulation code from the Terminal application
and turns it into the beginnings of LibVT.

The basic design idea is that users of VT::Terminal will implement and
provide a VT::TerminalClient subclass to handle presentation-specific
things. We'll need to iterate on this, but it's a start. :^)
2019-08-12 17:34:48 +02:00