Spinner

CHANGELOG.md

@@ -8,6 +8,7 @@
 * `-q/--quiet` option added to `rec` command
 * Fixed handling of partial UTF-8 sequences in recorded stdout
 * Final "exit" is now removed from recorded stdout
+* Longer operations like uploading/downloading show "spinner"
 
 ## 1.1.1 (2015-06-21)
 

asciicast/player.go

@@ -7,7 +7,7 @@ import (
 )
 
 type Player interface {
-	Play(string, uint) error
+	Play(*Asciicast, uint) error
 }
 
 type AsciicastPlayer struct {
@@ -18,12 +18,7 @@ func NewPlayer() Player {
 	return &AsciicastPlayer{Terminal: terminal.NewTerminal()}
 }
 
-func (r *AsciicastPlayer) Play(path string, maxWait uint) error {
-	asciicast, err := Load(path)
-	if err != nil {
-		return err
-	}
-
+func (r *AsciicastPlayer) Play(asciicast *Asciicast, maxWait uint) error {
 	for _, frame := range asciicast.Stdout {
 		delay := frame.Delay
 		if maxWait > 0 && delay > float64(maxWait) {

commands/play.go

@@ -1,6 +1,9 @@
 package commands
 
-import "github.com/asciinema/asciinema/asciicast"
+import (
+	"github.com/asciinema/asciinema/asciicast"
+	"github.com/asciinema/asciinema/util"
+)
 
 type PlayCommand struct {
 	Player asciicast.Player
@@ -12,6 +15,17 @@ func NewPlayCommand() *PlayCommand {
 	}
 }
 
-func (c *PlayCommand) Execute(filename string, maxWait uint) error {
-	return c.Player.Play(filename, maxWait)
+func (c *PlayCommand) Execute(url string, maxWait uint) error {
+	var cast *asciicast.Asciicast
+	var err error
+
+	util.WithSpinner(500, func() {
+		cast, err = asciicast.Load(url)
+	})
+
+	if err != nil {
+		return err
+	}
+
+	return c.Player.Play(cast, maxWait)
 }

commands/rec.go

@@ -49,7 +49,12 @@ func (c *RecordCommand) Execute(command, title string, assumeYes bool, maxWait u
 			util.ReadLine()
 		}
 
-		url, warn, err := c.API.UploadAsciicast(filename)
+		var url, warn string
+		var err error
+
+		util.WithSpinner(0, func() {
+			url, warn, err = c.API.UploadAsciicast(filename)
+		})
 
 		if warn != "" {
 			util.Warningf(warn)

commands/upload.go

@@ -18,7 +18,12 @@ func NewUploadCommand(api api.API) *UploadCommand {
 }
 
 func (c *UploadCommand) Execute(filename string) error {
-	url, warn, err := c.API.UploadAsciicast(filename)
+	var url, warn string
+	var err error
+
+	util.WithSpinner(0, func() {
+		url, warn, err = c.API.UploadAsciicast(filename)
+	})
 
 	if warn != "" {
 		util.Warningf(warn)

main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"fmt"
 	"os"
+	"os/signal"
 	"strconv"
 	"strings"
 
@@ -92,6 +93,10 @@ func environment() map[string]string {
 	return env
 }
 
+func showCursorBack() {
+	fmt.Fprintf(os.Stdout, "\x1b[?25h")
+}
+
 func main() {
 	env := environment()
 
@@ -100,6 +105,15 @@ func main() {
 		os.Exit(1)
 	}
 
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, os.Interrupt)
+	go func() {
+		<-c
+		showCursorBack()
+		os.Exit(1)
+	}()
+	defer showCursorBack()
+
 	cfg, err := util.GetConfig(env)
 	if err != nil {
 		fmt.Println(err)

util/spinner.go

@@ -0,0 +1,35 @@
+package util
+
+import (
+	"fmt"
+	"os"
+	"time"
+)
+
+var spinner = []rune("▉▊▋▌▍▎▏▎▍▌▋▊▉")
+
+func WithSpinner(delay int, f func()) {
+	stopChan := make(chan struct{})
+
+	go func() {
+		<-time.After(time.Duration(delay) * time.Millisecond)
+
+		i := 0
+		fmt.Fprintf(os.Stdout, "\x1b[?25l") // hide cursor
+
+		for {
+			select {
+			case <-stopChan:
+				return
+			case <-time.After(100 * time.Millisecond):
+				fmt.Fprintf(os.Stdout, "\r%c", spinner[i])
+				i = (i + 1) % len(spinner)
+			}
+		}
+	}()
+
+	f()
+
+	close(stopChan)
+	fmt.Fprintf(os.Stdout, "\r\x1b[K\x1b[?25h") // clear line and show cursor back
+}