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d7bb4b8639
Expose terminal snapshot through the libghostty-vt C API and add
a new C example that runs in CI to verify this stuff works!
## Example
```c
size_t continuation_limit = 1024;
assert(ghostty_terminal_set(
terminal,
GHOSTTY_TERMINAL_OPT_CONTINUATION_MAX_BYTES,
&continuation_limit) == GHOSTTY_SUCCESS);
uint8_t *bytes = NULL;
size_t len = 0;
assert(ghostty_snapshot_encode_alloc(
terminal, NULL, &bytes, &len) == GHOSTTY_SUCCESS);
GhosttySnapshotDecoder decoder = NULL;
assert(ghostty_snapshot_decoder_new_buf(
NULL, &decoder, bytes, len) == GHOSTTY_SUCCESS);
GhosttyTerminal restored = NULL;
assert(ghostty_snapshot_decoder_decode(
decoder, &restored) == GHOSTTY_SUCCESS);
ghostty_snapshot_decoder_free(decoder);
ghostty_free(NULL, bytes, len);
```
Streaming decode:
```c
GhosttyReader reader = {
.read = read_snapshot,
.userdata = source,
};
GhosttySnapshotDecoder decoder = NULL;
assert(ghostty_snapshot_decoder_new(
NULL, &decoder, reader) == GHOSTTY_SUCCESS);
GhosttyTerminal terminal = NULL;
assert(ghostty_snapshot_decoder_ready(
decoder, &terminal) == GHOSTTY_SUCCESS);
GhosttyResult result;
while ((result = ghostty_snapshot_decoder_next(decoder)) ==
GHOSTTY_SUCCESS) {
size_t rows = 0;
assert(ghostty_snapshot_decoder_get(
decoder,
GHOSTTY_SNAPSHOT_DECODER_DATA_PROGRESS_ROWS,
&rows) == GHOSTTY_SUCCESS);
render(terminal);
}
assert(result == GHOSTTY_NO_VALUE);
```
16 lines
486 B
Markdown
16 lines
486 B
Markdown
# Example: Terminal Snapshots in C
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This example creates a terminal with continuation tracking, encodes its full
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state, and restores the snapshot using both the one-shot and incremental C
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decoder APIs. The incremental path uses a synchronous `GhosttyReader` callback
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and reports each restored history page. The standalone project links the static
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libghostty-vt artifact so it can run consistently on every supported host.
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## Usage
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Run the example:
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```shell-session
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zig build run
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```
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