forked from Mirrors/bubbletea
121 lines
2.4 KiB
Go
121 lines
2.4 KiB
Go
package tea
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import (
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"errors"
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"fmt"
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"io"
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"os"
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"time"
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isatty "github.com/mattn/go-isatty"
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localereader "github.com/mattn/go-localereader"
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"github.com/muesli/cancelreader"
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"golang.org/x/term"
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)
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func (p *Program) initTerminal() error {
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err := p.initInput()
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if err != nil {
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return err
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}
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if p.console != nil {
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err = p.console.SetRaw()
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if err != nil {
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return fmt.Errorf("error entering raw mode: %w", err)
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}
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}
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p.renderer.hideCursor()
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return nil
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}
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// restoreTerminalState restores the terminal to the state prior to running the
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// Bubble Tea program.
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func (p *Program) restoreTerminalState() error {
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if p.renderer != nil {
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p.renderer.disableBracketedPaste()
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p.renderer.showCursor()
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p.disableMouse()
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if p.renderer.altScreen() {
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p.renderer.exitAltScreen()
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// give the terminal a moment to catch up
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time.Sleep(time.Millisecond * 10) //nolint:gomnd
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}
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}
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if p.console != nil {
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err := p.console.Reset()
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if err != nil {
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return fmt.Errorf("error restoring terminal state: %w", err)
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}
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}
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return p.restoreInput()
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}
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// initCancelReader (re)commences reading inputs.
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func (p *Program) initCancelReader() error {
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var err error
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p.cancelReader, err = cancelreader.NewReader(p.input)
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if err != nil {
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return fmt.Errorf("error creating cancelreader: %w", err)
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}
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p.readLoopDone = make(chan struct{})
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go p.readLoop()
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return nil
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}
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func (p *Program) readLoop() {
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defer close(p.readLoopDone)
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input := localereader.NewReader(p.cancelReader)
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err := readInputs(p.ctx, p.msgs, input)
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if !errors.Is(err, io.EOF) && !errors.Is(err, cancelreader.ErrCanceled) {
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select {
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case <-p.ctx.Done():
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case p.errs <- err:
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}
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}
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}
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// waitForReadLoop waits for the cancelReader to finish its read loop.
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func (p *Program) waitForReadLoop() {
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select {
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case <-p.readLoopDone:
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case <-time.After(500 * time.Millisecond): //nolint:gomnd
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// The read loop hangs, which means the input
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// cancelReader's cancel function has returned true even
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// though it was not able to cancel the read.
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}
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}
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// checkResize detects the current size of the output and informs the program
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// via a WindowSizeMsg.
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func (p *Program) checkResize() {
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f, ok := p.output.TTY().(*os.File)
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if !ok || !isatty.IsTerminal(f.Fd()) {
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// can't query window size
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return
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}
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w, h, err := term.GetSize(int(f.Fd()))
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if err != nil {
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select {
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case <-p.ctx.Done():
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case p.errs <- err:
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}
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return
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}
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p.Send(WindowSizeMsg{
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Width: w,
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Height: h,
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})
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}
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