WIP: progress (macOS).

internal/zenutil/osa_generated.go

@@ -56,16 +56,13 @@ app.includeStandardAdditions=true
 app.activate()
 ObjC.import('stdlib')
 ObjC.import('readline')
-function run(args){Progress.totalUnitCount=100
-Progress.completedUnitCount=0
-Progress.description=args[0]||"Progress"
-Progress.additionalDescription=args[1]||"Running..."
+try{Progress.totalUnitCount=$.getenv('total')}catch{}
+try{Progress.description=$.getenv('description')}catch{}
 while(true){var s
 try{s=$.readline('')}catch(e){if(e.errorNumber===-128)$.exit(1)
 break}
-if(s.indexOf('#')===0){Progress.additionalDescription=s.slice(1).trim()
+if(s.indexOf('#')===0){Progress.additionalDescription=s.slice(1)
 continue}
 var i=parseInt(s)
-if(Number.isSafeInteger(i)){Progress.completedUnitCount=i
-continue}}
-Progress.completedUnitCount=100}`
+if(i>=0&&Progress.totalUnitCount>0){Progress.completedUnitCount=i
+continue}}`

internal/zenutil/osascripts/progress.js

@@ -5,13 +5,10 @@ app.activate()
 ObjC.import('stdlib')
 ObjC.import('readline')
 
-function run(args) {
-    Progress.totalUnitCount = 100
-    Progress.completedUnitCount = 0
-    Progress.description = args[0] || "Progress"
-    Progress.additionalDescription = args[1] || "Running..."
+try { Progress.totalUnitCount = $.getenv('total') } catch { }
+try { Progress.description = $.getenv('description') } catch { }
 
-    while (true) {
+while (true) {
     var s
     try {
         s = $.readline('')
@@ -21,16 +18,13 @@ function run(args) {
     }
 
     if (s.indexOf('#') === 0) {
-            Progress.additionalDescription = s.slice(1).trim()
+        Progress.additionalDescription = s.slice(1)
         continue
     }
 
     var i = parseInt(s)
-        if (Number.isSafeInteger(i)) {
+    if (i >= 0 && Progress.totalUnitCount > 0) {
         Progress.completedUnitCount = i
         continue
     }
-    }
-
-    Progress.completedUnitCount = 100
 }

internal/zenutil/run_darwin.go

@@ -51,7 +51,7 @@ func Run(ctx context.Context, script string, data interface{}) ([]byte, error) {
 	return cmd.Output()
 }
 
-func RunProgress(ctx context.Context) (m *progressMonitor, err error) {
+func RunProgress(ctx context.Context, env []string) (m *progressDialog, err error) {
 	t, err := ioutil.TempDir("", "")
 	if err != nil {
 		return nil, err
@@ -93,6 +93,7 @@ func RunProgress(ctx context.Context) (m *progressMonitor, err error) {
 	}
 
 	cmd = exec.Command(executable)
+	cmd.Env = env
 	pipe, err := cmd.StdinPipe()
 	if err != nil {
 		return nil, err
@@ -104,7 +105,7 @@ func RunProgress(ctx context.Context) (m *progressMonitor, err error) {
 		ctx = context.Background()
 	}
 
-	m = &progressMonitor{
+	m = &progressDialog{
 		done:  make(chan struct{}),
 		lines: make(chan string),
 	}
@@ -139,13 +140,13 @@ func RunProgress(ctx context.Context) (m *progressMonitor, err error) {
 	return
 }
 
-type progressMonitor struct {
+type progressDialog struct {
 	err   error
 	done  chan struct{}
 	lines chan string
 }
 
-func (m *progressMonitor) send(line string) error {
+func (m *progressDialog) send(line string) error {
 	select {
 	case m.lines <- line:
 		return nil
@@ -154,18 +155,18 @@ func (m *progressMonitor) send(line string) error {
 	}
 }
 
-func (m *progressMonitor) Close() error {
+func (m *progressDialog) Close() error {
 	close(m.lines)
 	<-m.done
 	return m.err
 }
 
-func (m *progressMonitor) Message(msg string) error {
-	return m.send("#" + msg)
+func (m *progressDialog) Text(text string) error {
+	return m.send("#" + text)
 }
 
-func (m *progressMonitor) Progress(progress int) error {
-	return m.send(strconv.Itoa(progress))
+func (m *progressDialog) Value(value int) error {
+	return m.send(strconv.Itoa(value))
 }
 
 // File is internal.

progress.go

@@ -1,7 +1,36 @@
 package zenity
 
-type ProgressMonitor interface {
-	Message(string) error
-	Progress(int) error
+// Progress displays the progress indication dialog.
+//
+// Valid options: Title, Width, Height, OKLabel, CancelLabel, ExtraButton,
+// Icon, MaxValue, Pulsate, NoCancel, TimeRemaining.
+func Progress(options ...Option) (ProgressDialog, error) {
+	return progress(applyOptions(options))
+}
+
+type ProgressDialog interface {
+	Text(string) error
+	Value(int) error
 	Close() error
 }
+
+// MaxValue returns an Option to set the maximum value (macOS only).
+// The default value is 100.
+func MaxValue(value int) Option {
+	return funcOption(func(o *options) { o.maxValue = value })
+}
+
+// Pulsate returns an Option to pulsate the progress bar.
+func Pulsate() Option {
+	return funcOption(func(o *options) { o.maxValue = -1 })
+}
+
+// NoCancel returns an Option to hide the Cancel button (Unix only).
+func NoCancel() Option {
+	return funcOption(func(o *options) { o.noCancel = true })
+}
+
+// TimeRemaining returns an Option to estimate when progress will reach 100% (Unix only).
+func TimeRemaining() Option {
+	return funcOption(func(o *options) { o.timeRemaining = true })
+}

progress_darwin.go

@@ -0,0 +1,21 @@
+package zenity
+
+import (
+	"strconv"
+
+	"github.com/ncruces/zenity/internal/zenutil"
+)
+
+func progress(opts options) (ProgressDialog, error) {
+	var env []string
+	if opts.title != nil {
+		env = append(env, "description="+*opts.title)
+	}
+	if opts.maxValue == 0 {
+		opts.maxValue = 100
+	}
+	if opts.maxValue >= 0 {
+		env = append(env, "total="+strconv.Itoa(opts.maxValue))
+	}
+	return zenutil.RunProgress(opts.ctx, env)
+}

zenity.go

@@ -57,6 +57,11 @@ type options struct {
 	color       color.Color
 	showPalette bool
 
+	// Progress indication options
+	maxValue      int
+	noCancel      bool
+	timeRemaining bool
+
 	// Context for timeout
 	ctx context.Context
 }