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f282f13a21
GHOSTTY_ENUM_TYPED: expands to `: int` on C23 (where explicit enum underlying types are supported), empty on older standards.
77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
/**
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* @file focus.h
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*
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* Focus encoding - encode focus in/out events into terminal escape sequences.
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*/
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#ifndef GHOSTTY_VT_FOCUS_H
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#define GHOSTTY_VT_FOCUS_H
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/** @defgroup focus Focus Encoding
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*
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* Utilities for encoding focus gained/lost events into terminal escape
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* sequences (CSI I / CSI O) for focus reporting mode (mode 1004).
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*
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* ## Basic Usage
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*
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* Use ghostty_focus_encode() to encode a focus event into a caller-provided
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* buffer. If the buffer is too small, the function returns
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* GHOSTTY_OUT_OF_SPACE and sets the required size in the output parameter.
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*
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* ## Example
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*
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* @snippet c-vt-encode-focus/src/main.c focus-encode
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*
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* @{
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*/
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#include <stddef.h>
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#include <ghostty/vt/types.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Focus event types for focus reporting mode (mode 1004).
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*/
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typedef enum GHOSTTY_ENUM_TYPED {
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/** Terminal window gained focus */
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GHOSTTY_FOCUS_GAINED = 0,
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/** Terminal window lost focus */
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GHOSTTY_FOCUS_LOST = 1,
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GHOSTTY_FOCUS_MAX_VALUE = GHOSTTY_ENUM_MAX_VALUE,
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} GhosttyFocusEvent;
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/**
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* Encode a focus event into a terminal escape sequence.
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*
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* Encodes a focus gained (CSI I) or focus lost (CSI O) report into the
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* provided buffer.
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*
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* If the buffer is too small, the function returns GHOSTTY_OUT_OF_SPACE
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* and writes the required buffer size to @p out_written. The caller can
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* then retry with a sufficiently sized buffer.
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*
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* @param event The focus event to encode
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* @param buf Output buffer to write the encoded sequence into (may be NULL)
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* @param buf_len Size of the output buffer in bytes
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* @param[out] out_written On success, the number of bytes written. On
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* GHOSTTY_OUT_OF_SPACE, the required buffer size.
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* @return GHOSTTY_SUCCESS on success, GHOSTTY_OUT_OF_SPACE if the buffer
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* is too small
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*/
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GHOSTTY_API GhosttyResult ghostty_focus_encode(
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GhosttyFocusEvent event,
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char* buf,
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size_t buf_len,
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size_t* out_written);
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#ifdef __cplusplus
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}
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#endif
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/** @} */
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#endif /* GHOSTTY_VT_FOCUS_H */
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