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package uv
import (
"os"
"sync"
"github.com/charmbracelet/x/term"
)
// SizeNotifier represents a notifier that listens for window size
// changes using the SIGWINCH signal and notifies the given channel.
type SizeNotifier struct {
// Channel that receives terminal size change notifications.
C <-chan os.Signal
f term.File
sig chan os.Signal
m sync.Mutex
}
// NewSizeNotifier creates a new [SizeNotifier] that listens for window size
// changes on the given TTY file through SIGWINCH signals.
func NewSizeNotifier(f term.File) *SizeNotifier {
if f == nil {
panic("no file set")
}
sig := make(chan os.Signal)
return &SizeNotifier{
f: f,
sig: sig,
C: sig,
}
}
// Start starts listening for window size changes and notifies [SizeNotifier.C]
// about any changes.
func (n *SizeNotifier) Start() error {
return n.start()
}
// Stop stops the notifier and cleans up resources.
func (n *SizeNotifier) Stop() error {
return n.stop()
}
// GetWindowSize returns the current size of the terminal window.
func (n *SizeNotifier) GetWindowSize() (cells Size, pixels Size, err error) {
return n.getWindowSize()
}
// GetSize returns the current cell size of the terminal window.
func (n *SizeNotifier) GetSize() (width, height int, err error) {
n.m.Lock()
defer n.m.Unlock()
width, height, err = term.GetSize(n.f.Fd())
if err != nil {
return 0, 0, err //nolint:wrapcheck
}
return width, height, nil
}
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