lib-vt: update documentation with more examples

This commit is contained in:
Mitchell Hashimoto
2025-10-05 14:48:40 -07:00
parent 48f5e4a16d
commit fd0851bae7
2 changed files with 368 additions and 0 deletions

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@@ -327,6 +327,63 @@ typedef struct {
* Utilities for encoding key events into terminal escape sequences, * Utilities for encoding key events into terminal escape sequences,
* supporting both legacy encoding as well as Kitty Keyboard Protocol. * supporting both legacy encoding as well as Kitty Keyboard Protocol.
* *
* ## Basic Usage
*
* 1. Create an encoder instance with ghostty_key_encoder_new()
* 2. Configure encoder options with ghostty_key_encoder_setopt().
* 3. For each key event:
* - Create a key event with ghostty_key_event_new()
* - Set event properties (action, key, modifiers, etc.)
* - Encode with ghostty_key_encoder_encode()
* - Free the event with ghostty_key_event_free()
* - Note: You can also reuse the same key event multiple times by
* changing its properties.
* 4. Free the encoder with ghostty_key_encoder_free() when done
*
* ## Example
*
* @code{.c}
* #include <assert.h>
* #include <stdio.h>
* #include <ghostty/vt.h>
*
* int main() {
* // Create encoder
* GhosttyKeyEncoder encoder;
* GhosttyResult result = ghostty_key_encoder_new(NULL, &encoder);
* assert(result == GHOSTTY_SUCCESS);
*
* // Enable Kitty keyboard protocol with all features
* ghostty_key_encoder_setopt(encoder, GHOSTTY_KEY_ENCODER_OPT_KITTY_FLAGS,
* &(uint8_t){GHOSTTY_KITTY_KEY_ALL});
*
* // Create and configure key event for Ctrl+C press
* GhosttyKeyEvent event;
* result = ghostty_key_event_new(NULL, &event);
* assert(result == GHOSTTY_SUCCESS);
* ghostty_key_event_set_action(event, GHOSTTY_KEY_ACTION_PRESS);
* ghostty_key_event_set_key(event, GHOSTTY_KEY_C);
* ghostty_key_event_set_mods(event, GHOSTTY_MODS_CTRL);
*
* // Encode the key event
* char buf[128];
* size_t written = 0;
* result = ghostty_key_encoder_encode(encoder, event, buf, sizeof(buf), &written);
* assert(result == GHOSTTY_SUCCESS);
*
* // Use the encoded sequence (e.g., write to terminal)
* fwrite(buf, 1, written, stdout);
*
* // Cleanup
* ghostty_key_event_free(event);
* ghostty_key_encoder_free(encoder);
* return 0;
* }
* @endcode
*
* For a complete working example, see example/c-vt-key-encode in the
* repository.
*
* @{ * @{
*/ */
@@ -949,6 +1006,48 @@ void ghostty_key_encoder_setopt(GhosttyKeyEncoder encoder, GhosttyKeyEncoderOpti
* @param out_len Pointer to store the number of bytes written (may be NULL) * @param out_len Pointer to store the number of bytes written (may be NULL)
* @return GHOSTTY_SUCCESS on success, GHOSTTY_OUT_OF_MEMORY if buffer too small, or other error code * @return GHOSTTY_SUCCESS on success, GHOSTTY_OUT_OF_MEMORY if buffer too small, or other error code
* *
* ## Example: Calculate required buffer size
*
* @code{.c}
* // Query the required size with a NULL buffer (always returns OUT_OF_MEMORY)
* size_t required = 0;
* GhosttyResult result = ghostty_key_encoder_encode(encoder, event, NULL, 0, &required);
* assert(result == GHOSTTY_OUT_OF_MEMORY);
*
* // Allocate buffer of required size
* char *buf = malloc(required);
*
* // Encode with properly sized buffer
* size_t written = 0;
* result = ghostty_key_encoder_encode(encoder, event, buf, required, &written);
* assert(result == GHOSTTY_SUCCESS);
*
* // Use the encoded sequence...
*
* free(buf);
* @endcode
*
* ## Example: Direct encoding with static buffer
*
* @code{.c}
* // Most escape sequences are short, so a static buffer often suffices
* char buf[128];
* size_t written = 0;
* GhosttyResult result = ghostty_key_encoder_encode(encoder, event, buf, sizeof(buf), &written);
*
* if (result == GHOSTTY_SUCCESS) {
* // Write the encoded sequence to the terminal
* write(pty_fd, buf, written);
* } else if (result == GHOSTTY_OUT_OF_MEMORY) {
* // Buffer too small, written contains required size
* char *dynamic_buf = malloc(written);
* result = ghostty_key_encoder_encode(encoder, event, dynamic_buf, written, &written);
* assert(result == GHOSTTY_SUCCESS);
* write(pty_fd, dynamic_buf, written);
* free(dynamic_buf);
* }
* @endcode
*
* @ingroup key * @ingroup key
*/ */
GhosttyResult ghostty_key_encoder_encode(GhosttyKeyEncoder encoder, GhosttyKeyEvent event, char *out_buf, size_t out_buf_size, size_t *out_len); GhosttyResult ghostty_key_encoder_encode(GhosttyKeyEncoder encoder, GhosttyKeyEvent event, char *out_buf, size_t out_buf_size, size_t *out_len);