117 lines
2.0 KiB
Go
117 lines
2.0 KiB
Go
//go:build !windows
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package zenutil
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import (
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"bytes"
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"context"
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"io"
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"os"
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"os/exec"
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"runtime"
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"strconv"
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"sync/atomic"
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"time"
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)
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type progressDialog struct {
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ctx context.Context
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cmd *exec.Cmd
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max int
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percent bool
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closed int32
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lines chan string
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done chan struct{}
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err error
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}
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func (d *progressDialog) send(line string) error {
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select {
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case d.lines <- line:
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return nil
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case <-d.done:
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return d.err
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}
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}
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func (d *progressDialog) Text(text string) error {
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return d.send("#" + text)
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}
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func (d *progressDialog) Value(value int) error {
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if d.percent {
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return d.send(strconv.FormatFloat(100*float64(value)/float64(d.max), 'f', -1, 64))
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} else {
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return d.send(strconv.Itoa(value))
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}
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}
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func (d *progressDialog) MaxValue() int {
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return d.max
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}
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func (d *progressDialog) Done() <-chan struct{} {
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return d.done
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}
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func (d *progressDialog) Complete() error {
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err := d.Value(d.max)
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close(d.lines)
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return err
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}
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func (d *progressDialog) Close() error {
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atomic.StoreInt32(&d.closed, 1)
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d.cmd.Process.Signal(os.Interrupt)
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<-d.done
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return d.err
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}
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func (d *progressDialog) wait(extra *string, out *bytes.Buffer) {
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err := d.cmd.Wait()
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if cerr := d.ctx.Err(); cerr != nil {
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err = cerr
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}
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if eerr, ok := err.(*exec.ExitError); ok {
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switch {
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case eerr.ExitCode() == -1 && atomic.LoadInt32(&d.closed) != 0:
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err = nil
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case eerr.ExitCode() == 1:
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if extra != nil && *extra+"\n" == string(out.Bytes()) {
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err = ErrExtraButton
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} else {
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err = ErrCanceled
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}
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}
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}
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d.err = err
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close(d.done)
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}
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func (d *progressDialog) pipe(w io.WriteCloser) {
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defer w.Close()
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var timeout = time.Second
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if runtime.GOOS == "darwin" {
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timeout = 40 * time.Millisecond
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}
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for {
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var line string
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select {
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case s, ok := <-d.lines:
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if !ok {
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return
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}
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line = s
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case <-d.ctx.Done():
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return
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case <-d.done:
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return
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case <-time.After(timeout):
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// line = ""
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}
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if _, err := w.Write([]byte(line + "\n")); err != nil {
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return
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}
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}
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}
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