This fixes the VS16 issues found in this test:
https://ucs-detect.readthedocs.io/sw_results/ghostty.html#ghostty
This is also a more robust way to handle VS15/16 in general.
This commit also changes our propeties to be a packed struct which
reduces its size from 4 bytes to 1 and likewise drops our unicode table
size 4x.
This updates uucode. As part of this, the wcwidth implementation was
updated (in uucode) to make emoji modifiers width ZERO. But if they're
standalone, we want them as width 2.
So this also contains a change to force them as width 2 for our width
calculation. This only matters for standalone emoji modifiers, because
when they form a valid grapheme we don't use this width calculation.
Fixes#9426
Since we can't set the meta charset tag since we emit partial HTML, we
use codepoint entities like `{` for non-ASCII characters to
ensure proper rendering.
This adds HTML formatting capabilities to the formatter package. HTML is
emitted as inline styles. For palette indexes, direct RGB is emitted if
we have access to a palette; otherwise, we fall back to CSS variables.
This isn't exposed to end users yet, but will enable copy as html
features. This is available in libghostty.
Fixes#9395
**AI disclosure:** I used AI (Amp) to help me write tests, but the
implementation was done manually. I reviewed everything.
This removes all existing functionality that I know of that encodes a
terminal, screen, pagelist, or page as plaintext and unifies all logic
onto the formatter system.
This replaces the logic of Screen.selectionString with calls to
ScreenFormatter.
This means that all our various selection-based features like copying to
clipboards now uses the new formatter. The formatter code is now
user-facing.
This forced us to pass all selectionString tests which revealed some
edge cases that were not handled correctly before in the formatter! The
formatter now handles:
- Plain text now emits `\n` instead of `\r\n`. VT emits `\r\n`
- Rectangular selections
- Various wide character edge cases
- Selection is now inclusive on the end, not exclusive
This adds the option `pin_map` or `point_map` (for pages) to formatter,
allowing callers to get a byte-by-byte mapping for where on the screen
each encoding maps to. This is used by search internals and hyperlinks.
I haven't hooked that all up yet. This diff was big enough I wanted this
as one.
Tests significantly cover the new feature.
Next up, we'll rip out `selectionString` and replace it with formatters!
This adds a new formatter that can be used with standard Zig `{f}`
formatting that emits any portion of the terminal screen as VT
sequences. In addition to simply styling, this can emit the entire
terminal/screen state such as cursor positions, active style, terminal
modes, etc.
To do this, I've extracted all formatting to a dedicated `formatter`
package within `terminal`. This handles all formatting types (currently
plaintext and VT formatting, but can imagine things like HTML in the
future). Presently, we have "formatting" split out across a variety of
places in Terminal, Screen, PageList, and Page. I didn't remove this
code yet but I intend to unify it all on formatter in the future.
This also doesn't expose this functionality in any user-facing way yet.
This PR just adds it to the ghostty-vt Zig module and unit tests it.
Ghostty app changes will come later.
**This also improves the readonly stream** to handle OSC color
operations for _setting_ but it doesn't emit any responses of course,
since its readonly.
This exposes the SGR parser to the C and Wasm APIs. An example is shown
in c-vt-sgr.
Compressed example:
```c
#include <assert.h>
#include <stdio.h>
#include <ghostty/vt.h>
int main() {
// Create parser
GhosttySgrParser parser;
assert(ghostty_sgr_new(NULL, &parser) == GHOSTTY_SUCCESS);
// Parse: ESC[1;31m (bold + red foreground)
uint16_t params[] = {1, 31};
assert(ghostty_sgr_set_params(parser, params, NULL, 2) == GHOSTTY_SUCCESS);
printf("Parsing: ESC[1;31m\n\n");
// Iterate through attributes
GhosttySgrAttribute attr;
while (ghostty_sgr_next(parser, &attr)) {
switch (attr.tag) {
case GHOSTTY_SGR_ATTR_BOLD:
printf("✓ Bold enabled\n");
break;
case GHOSTTY_SGR_ATTR_FG_8:
printf("✓ Foreground color: %d (red)\n", attr.value.fg_8);
break;
default:
break;
}
}
ghostty_sgr_free(parser);
return 0;
}
```
**AI disclosure:** Amp wrote most of the C headers, but I verified it
all. https://ampcode.com/threads/T-d9f145cb-e6ef-48a8-ad63-e5fc85c0d43e
This adds a new stream handler implementation that updates terminal
state in reaction to VT sequences, but doesn't perform any of the
actions that would require responses (e.g. queries).
This is exposed in two ways: first, as a standalone `ReadonlyStream` and
`ReadonlyHandler` type that contains all the implementation. Second, as
a convenience func on `Terminal` as `vtStream` and `vtHandler` which
return their respective types preconfigured to update the calling
terminal state.
This dramatically simplifies libghostty-vt usage from Zig (and will
eventually be exposed to C, too) since a Terminal on its own is ready to
go as a full VT parser and state machine without needing to build any
custom types!
There's a second big bonus here which is that our `stream_readonly.zig`
tests are true end-to-end tests for raw bytes to terminal state. This
will let us test a wider variety of situations more broadly. To start,
there are only a handful of tests implemented here.
**AI disclosure:** Amp wrote basically this whole thing, but I reviewed
it. https://ampcode.com/threads/T-3490efd2-1137-4112-96f6-4bf8a0141ff5
