List (unix), refactor.

color_darwin.go

@@ -2,7 +2,6 @@ package zenity
 
 import (
 	"image/color"
-	"os/exec"
 
 	"github.com/ncruces/zenity/internal/zenutil"
 )
@@ -21,11 +20,9 @@ func selectColor(opts options) (color.Color, error) {
 		float32(g) / 0xffff,
 		float32(b) / 0xffff,
 	})
-	if err, ok := err.(*exec.ExitError); ok && err.ExitCode() == 1 {
-		return nil, nil
+	str, ok, err := strResult(opts, out, err)
+	if ok {
+		return zenutil.ParseColor(str), nil
 	}
-	if err != nil {
 	return nil, err
 }
-	return zenutil.ParseColor(string(out)), nil
-}

color_unix.go

@@ -4,7 +4,6 @@ package zenity
 
 import (
 	"image/color"
-	"os/exec"
 
 	"github.com/ncruces/zenity/internal/zenutil"
 )
@@ -12,9 +11,7 @@ import (
 func selectColor(opts options) (color.Color, error) {
 	args := []string{"--color-selection"}
 
-	if opts.title != nil {
-		args = append(args, "--title", *opts.title)
-	}
+	args = appendTitle(args, opts)
 	if opts.color != nil {
 		args = append(args, "--color", zenutil.UnparseColor(opts.color))
 	}
@@ -23,11 +20,9 @@ func selectColor(opts options) (color.Color, error) {
 	}
 
 	out, err := zenutil.Run(opts.ctx, args)
-	if err, ok := err.(*exec.ExitError); ok && err.ExitCode() == 1 {
-		return nil, nil
+	str, ok, err := strResult(opts, out, err)
+	if ok {
+		return zenutil.ParseColor(str), nil
 	}
-	if err != nil {
 	return nil, err
 }
-	return zenutil.ParseColor(string(out)), nil
-}

entry_darwin.go

@@ -1,9 +1,6 @@
 package zenity
 
 import (
-	"bytes"
-	"os/exec"
-
 	"github.com/ncruces/zenity/internal/zenutil"
 )
 
@@ -19,22 +16,11 @@ func entry(text string, opts options) (string, bool, error) {
 	data.SetButtons(getButtons(true, true, opts))
 
 	out, err := zenutil.Run(opts.ctx, "dialog", data)
-	out = bytes.TrimSuffix(out, []byte{'\n'})
-	if err, ok := err.(*exec.ExitError); ok && err.ExitCode() == 1 {
-		if opts.extraButton != nil &&
-			*opts.extraButton == string(out) {
-			return "", false, ErrExtraButton
-		}
-		return "", false, nil
-	}
-	if err != nil {
-		return "", false, err
-	}
-	return string(out), true, nil
+	return strResult(opts, out, err)
 }
 
 func password(opts options) (string, string, bool, error) {
 	opts.hideText = true
-	pass, ok, err := entry("Password:", opts)
-	return "", pass, ok, err
+	str, ok, err := entry("Password:", opts)
+	return "", str, ok, err
 }

entry_unix.go

@@ -3,97 +3,42 @@
 package zenity
 
 import (
-	"bytes"
-	"os/exec"
-	"strconv"
 	"strings"
 
 	"github.com/ncruces/zenity/internal/zenutil"
 )
 
 func entry(text string, opts options) (string, bool, error) {
-	args := []string{"--entry", "--text", text, "--entry-text", opts.entryText}
-	if opts.title != nil {
-		args = append(args, "--title", *opts.title)
-	}
-	if opts.width > 0 {
-		args = append(args, "--width", strconv.FormatUint(uint64(opts.width), 10))
-	}
-	if opts.height > 0 {
-		args = append(args, "--height", strconv.FormatUint(uint64(opts.height), 10))
-	}
-	if opts.okLabel != nil {
-		args = append(args, "--ok-label", *opts.okLabel)
-	}
-	if opts.cancelLabel != nil {
-		args = append(args, "--cancel-label", *opts.cancelLabel)
-	}
-	if opts.extraButton != nil {
-		args = append(args, "--extra-button", *opts.extraButton)
+	args := []string{"--entry", "--text", text}
+	args = appendTitle(args, opts)
+	args = appendButtons(args, opts)
+	args = appendWidthHeight(args, opts)
+	args = appendIcon(args, opts)
+	if opts.entryText != "" {
+		args = append(args, "--entry-text", opts.entryText)
 	}
 	if opts.hideText {
 		args = append(args, "--hide-text")
 	}
-	switch opts.icon {
-	case ErrorIcon:
-		args = append(args, "--window-icon=error")
-	case WarningIcon:
-		args = append(args, "--window-icon=warning")
-	case InfoIcon:
-		args = append(args, "--window-icon=info")
-	case QuestionIcon:
-		args = append(args, "--window-icon=question")
-	}
 
 	out, err := zenutil.Run(opts.ctx, args)
-	out = bytes.TrimSuffix(out, []byte{'\n'})
-	if err, ok := err.(*exec.ExitError); ok && err.ExitCode() == 1 {
-		if opts.extraButton != nil &&
-			*opts.extraButton == string(out) {
-			return "", false, ErrExtraButton
-		}
-		return "", false, nil
-	}
-	if err != nil {
-		return "", false, err
-	}
-	return string(out), true, nil
+	return strResult(opts, out, err)
 }
 
 func password(opts options) (string, string, bool, error) {
 	args := []string{"--password"}
-	if opts.title != nil {
-		args = append(args, "--title", *opts.title)
-	}
-	if opts.okLabel != nil {
-		args = append(args, "--ok-label", *opts.okLabel)
-	}
-	if opts.cancelLabel != nil {
-		args = append(args, "--cancel-label", *opts.cancelLabel)
-	}
-	if opts.extraButton != nil {
-		args = append(args, "--extra-button", *opts.extraButton)
-	}
+	args = appendTitle(args, opts)
+	args = appendButtons(args, opts)
 	if opts.username {
 		args = append(args, "--username")
 	}
 
 	out, err := zenutil.Run(opts.ctx, args)
-	out = bytes.TrimSuffix(out, []byte{'\n'})
-	if err, ok := err.(*exec.ExitError); ok && err.ExitCode() == 1 {
-		if opts.extraButton != nil &&
-			*opts.extraButton == string(out) {
-			return "", "", false, ErrExtraButton
-		}
-		return "", "", false, nil
-	}
-	if err != nil {
-		return "", "", false, err
-	}
-	if opts.username {
+	str, ok, err := strResult(opts, out, err)
+	if ok && opts.username {
 		if split := strings.SplitN(string(out), "|", 2); len(split) == 2 {
 			return split[0], split[1], true, nil
 		}
 	}
-	return "", string(out), true, nil
+	return "", str, ok, err
 }

file_darwin.go

@@ -1,8 +1,6 @@
 package zenity
 
 import (
-	"bytes"
-	"os/exec"
 	"strings"
 
 	"github.com/ncruces/zenity/internal/zenutil"
@@ -22,13 +20,8 @@ func selectFile(opts options) (string, error) {
 	}
 
 	out, err := zenutil.Run(opts.ctx, "file", data)
-	if err, ok := err.(*exec.ExitError); ok && err.ExitCode() == 1 {
-		return "", nil
-	}
-	if err != nil {
-		return "", err
-	}
-	return string(bytes.TrimSuffix(out, []byte{'\n'})), nil
+	str, _, err := strResult(opts, out, err)
+	return str, err
 }
 
 func selectFileMutiple(opts options) ([]string, error) {
@@ -47,17 +40,7 @@ func selectFileMutiple(opts options) ([]string, error) {
 	}
 
 	out, err := zenutil.Run(opts.ctx, "file", data)
-	if err, ok := err.(*exec.ExitError); ok && err.ExitCode() == 1 {
-		return nil, nil
-	}
-	if err != nil {
-		return nil, err
-	}
-	out = bytes.TrimSuffix(out, []byte{'\n'})
-	if len(out) == 0 {
-		return nil, nil
-	}
-	return strings.Split(string(out), zenutil.Separator), nil
+	return lstResult(opts, out, err)
 }
 
 func selectFileSave(opts options) (string, error) {
@@ -73,13 +56,8 @@ func selectFileSave(opts options) (string, error) {
 	}
 
 	out, err := zenutil.Run(opts.ctx, "file", data)
-	if err, ok := err.(*exec.ExitError); ok && err.ExitCode() == 1 {
-		return "", nil
-	}
-	if err != nil {
-		return "", err
-	}
-	return string(bytes.TrimSuffix(out, []byte{'\n'})), nil
+	str, _, err := strResult(opts, out, err)
+	return str, err
 }
 
 func initFilters(filters []FileFilter) []string {

file_unix.go

@@ -3,8 +3,6 @@
 package zenity
 
 import (
-	"bytes"
-	"os/exec"
 	"strings"
 
 	"github.com/ncruces/zenity/internal/zenutil"
@@ -12,78 +10,31 @@ import (
 
 func selectFile(opts options) (string, error) {
 	args := []string{"--file-selection"}
-	if opts.title != nil {
-		args = append(args, "--title", *opts.title)
-	}
-	if opts.directory {
-		args = append(args, "--directory")
-	}
-	if opts.filename != "" {
-		args = append(args, "--filename", opts.filename)
-	}
-	args = append(args, initFilters(opts.fileFilters)...)
+	args = appendTitle(args, opts)
+	args = appendFileArgs(args, opts)
 
 	out, err := zenutil.Run(opts.ctx, args)
-	if err, ok := err.(*exec.ExitError); ok && err.ExitCode() == 1 {
-		return "", nil
-	}
-	if err != nil {
-		return "", err
-	}
-	return string(bytes.TrimSuffix(out, []byte{'\n'})), nil
+	str, _, err := strResult(opts, out, err)
+	return str, err
 }
 
 func selectFileMutiple(opts options) ([]string, error) {
 	args := []string{"--file-selection", "--multiple", "--separator", zenutil.Separator}
-	if opts.title != nil {
-		args = append(args, "--title", *opts.title)
-	}
-	if opts.directory {
-		args = append(args, "--directory")
-	}
-	if opts.filename != "" {
-		args = append(args, "--filename", opts.filename)
-	}
-	args = append(args, initFilters(opts.fileFilters)...)
+	args = appendTitle(args, opts)
+	args = appendFileArgs(args, opts)
 
 	out, err := zenutil.Run(opts.ctx, args)
-	if err, ok := err.(*exec.ExitError); ok && err.ExitCode() == 1 {
-		return nil, nil
-	}
-	if err != nil {
-		return nil, err
-	}
-	out = bytes.TrimSuffix(out, []byte{'\n'})
-	if len(out) == 0 {
-		return nil, nil
-	}
-	return strings.Split(string(out), zenutil.Separator), nil
+	return lstResult(opts, out, err)
 }
 
 func selectFileSave(opts options) (string, error) {
 	args := []string{"--file-selection", "--save"}
-	if opts.title != nil {
-		args = append(args, "--title", *opts.title)
-	}
-	if opts.directory {
-		args = append(args, "--directory")
-	}
-	if opts.confirmOverwrite {
-		args = append(args, "--confirm-overwrite")
-	}
-	if opts.filename != "" {
-		args = append(args, "--filename", opts.filename)
-	}
-	args = append(args, initFilters(opts.fileFilters)...)
+	args = appendTitle(args, opts)
+	args = appendFileArgs(args, opts)
 
 	out, err := zenutil.Run(opts.ctx, args)
-	if err, ok := err.(*exec.ExitError); ok && err.ExitCode() == 1 {
-		return "", nil
-	}
-	if err != nil {
-		return "", err
-	}
-	return string(bytes.TrimSuffix(out, []byte{'\n'})), nil
+	str, _, err := strResult(opts, out, err)
+	return str, err
 }
 
 func initFilters(filters []FileFilter) []string {
@@ -103,3 +54,18 @@ func initFilters(filters []FileFilter) []string {
 	}
 	return res
 }
+
+func appendFileArgs(args []string, opts options) []string {
+	if opts.directory {
+		args = append(args, "--directory")
+	}
+	if opts.filename != "" {
+		args = append(args, "--filename", opts.filename)
+	}
+	if opts.confirmOverwrite {
+		args = append(args, "--confirm-overwrite")
+	}
+	args = append(args, initFilters(opts.fileFilters)...)
+
+	return args
+}

internal/zenutil/color.go

@@ -47,12 +47,9 @@ func ParseColor(s string) color.Color {
 		}
 	}
 
-	c, ok := colornames.Map[strings.ToLower(s)]
-	if ok {
+	c, _ := colornames.Map[strings.ToLower(s)]
 	return c
 }
-	return nil
-}
 
 // UnparseColor is internal.
 func UnparseColor(c color.Color) string {

list.go

@@ -17,7 +17,7 @@ func ListItems(text string, items ...string) (string, bool, error) {
 	return List(text, items)
 }
 
-// ListMultiple displays the list dialog, allowing multiple rows to be selected.
+// ListMultiple displays the list dialog, allowing multiple items to be selected.
 //
 // Returns a nil slice on cancel, or ErrExtraButton.
 //
@@ -27,19 +27,19 @@ func ListMultiple(text string, items []string, options ...Option) ([]string, err
 	return listMultiple(text, items, applyOptions(options))
 }
 
-// ListMultiple displays the list dialog, allowing multiple rows to be selected.
+// ListMultiple displays the list dialog, allowing multiple items to be selected.
 //
 // Returns a nil slice on cancel, or ErrExtraButton.
 func ListMultipleItems(text string, items ...string) ([]string, error) {
 	return ListMultiple(text, items)
 }
 
-// DefaultItems returns an Option to set the items to initally select.
+// DefaultItems returns an Option to set the items to initally select (Windows and macOS only).
 func DefaultItems(items ...string) Option {
 	return funcOption(func(o *options) { o.defaultItems = items })
 }
 
-// DisallowEmpty returns an Option to not allow zero rows to be selected (Windows and macOS only).
+// DisallowEmpty returns an Option to not allow zero items to be selected (Windows and macOS only).
 func DisallowEmpty() Option {
 	return funcOption(func(o *options) { o.disallowEmpty = true })
 }

list_darwin.go

@@ -1,10 +1,6 @@
 package zenity
 
 import (
-	"bytes"
-	"os/exec"
-	"strings"
-
 	"github.com/ncruces/zenity/internal/zenutil"
 )
 
@@ -19,13 +15,7 @@ func list(text string, items []string, opts options) (string, bool, error) {
 	data.Options.Empty = !opts.disallowEmpty
 
 	out, err := zenutil.Run(opts.ctx, "list", data)
-	if err, ok := err.(*exec.ExitError); ok && err.ExitCode() == 1 {
-		return "", false, nil
-	}
-	if err != nil {
-		return "", false, err
-	}
-	return string(bytes.TrimSuffix(out, []byte{'\n'})), true, nil
+	return strResult(opts, out, err)
 }
 
 func listMultiple(text string, items []string, opts options) ([]string, error) {
@@ -41,15 +31,5 @@ func listMultiple(text string, items []string, opts options) ([]string, error) {
 	data.Separator = zenutil.Separator
 
 	out, err := zenutil.Run(opts.ctx, "list", data)
-	if err, ok := err.(*exec.ExitError); ok && err.ExitCode() == 1 {
-		return nil, nil
-	}
-	if err != nil {
-		return nil, err
-	}
-	out = bytes.TrimSuffix(out, []byte{'\n'})
-	if len(out) == 0 {
-		return nil, nil
-	}
-	return strings.Split(string(out), zenutil.Separator), nil
+	return lstResult(opts, out, err)
 }

list_unix.go

@@ -2,10 +2,30 @@
 
 package zenity
 
+import (
+	"github.com/ncruces/zenity/internal/zenutil"
+)
+
 func list(text string, items []string, opts options) (string, bool, error) {
-	return "", false, nil
+	args := []string{"--list", "--column=", "--hide-header", "--text", text}
+	args = appendTitle(args, opts)
+	args = appendButtons(args, opts)
+	args = appendWidthHeight(args, opts)
+	args = appendIcon(args, opts)
+	args = append(args, items...)
+
+	out, err := zenutil.Run(opts.ctx, args)
+	return strResult(opts, out, err)
 }
 
 func listMultiple(text string, items []string, opts options) ([]string, error) {
-	return nil, nil
+	args := []string{"--list", "--column=", "--hide-header", "--text", text, "--multiple", "--separator", zenutil.Separator}
+	args = appendTitle(args, opts)
+	args = appendButtons(args, opts)
+	args = appendWidthHeight(args, opts)
+	args = appendIcon(args, opts)
+	args = append(args, items...)
+
+	out, err := zenutil.Run(opts.ctx, args)
+	return lstResult(opts, out, err)
 }

msg_darwin.go

@@ -1,9 +1,6 @@
 package zenity
 
 import (
-	"bytes"
-	"os/exec"
-
 	"github.com/ncruces/zenity/internal/zenutil"
 )
 
@@ -36,15 +33,6 @@ func message(kind messageKind, text string, opts options) (bool, error) {
 	data.SetButtons(getButtons(dialog, kind == questionKind, opts))
 
 	out, err := zenutil.Run(opts.ctx, "dialog", data)
-	if err, ok := err.(*exec.ExitError); ok && err.ExitCode() == 1 {
-		if opts.extraButton != nil &&
-			*opts.extraButton == string(bytes.TrimSuffix(out, []byte{'\n'})) {
-			return false, ErrExtraButton
-		}
-		return false, nil
-	}
-	if err != nil {
-		return false, err
-	}
-	return true, err
+	_, ok, err := strResult(opts, out, err)
+	return ok, err
 }

msg_unix.go

@@ -3,10 +3,6 @@
 package zenity
 
 import (
-	"bytes"
-	"os/exec"
-	"strconv"
-
 	"github.com/ncruces/zenity/internal/zenutil"
 )
 
@@ -22,24 +18,10 @@ func message(kind messageKind, text string, opts options) (bool, error) {
 	case errorKind:
 		args = append(args, "--error")
 	}
-	if opts.title != nil {
-		args = append(args, "--title", *opts.title)
-	}
-	if opts.width > 0 {
-		args = append(args, "--width", strconv.FormatUint(uint64(opts.width), 10))
-	}
-	if opts.height > 0 {
-		args = append(args, "--height", strconv.FormatUint(uint64(opts.height), 10))
-	}
-	if opts.okLabel != nil {
-		args = append(args, "--ok-label", *opts.okLabel)
-	}
-	if opts.cancelLabel != nil {
-		args = append(args, "--cancel-label", *opts.cancelLabel)
-	}
-	if opts.extraButton != nil {
-		args = append(args, "--extra-button", *opts.extraButton)
-	}
+	args = appendTitle(args, opts)
+	args = appendButtons(args, opts)
+	args = appendWidthHeight(args, opts)
+	args = appendIcon(args, opts)
 	if opts.noWrap {
 		args = append(args, "--no-wrap")
 	}
@@ -51,13 +33,13 @@ func message(kind messageKind, text string, opts options) (bool, error) {
 	}
 	switch opts.icon {
 	case ErrorIcon:
-		args = append(args, "--window-icon=error", "--icon-name=dialog-error")
+		args = append(args, "--icon-name=dialog-error")
 	case WarningIcon:
-		args = append(args, "--window-icon=warning", "--icon-name=dialog-warning")
+		args = append(args, "--icon-name=dialog-warning")
 	case InfoIcon:
-		args = append(args, "--window-icon=info", "--icon-name=dialog-information")
+		args = append(args, "--icon-name=dialog-information")
 	case QuestionIcon:
-		args = append(args, "--window-icon=question", "--icon-name=dialog-question")
+		args = append(args, "--icon-name=dialog-question")
 	case PasswordIcon:
 		args = append(args, "--icon-name=dialog-password")
 	case NoIcon:
@@ -65,15 +47,6 @@ func message(kind messageKind, text string, opts options) (bool, error) {
 	}
 
 	out, err := zenutil.Run(opts.ctx, args)
-	if err, ok := err.(*exec.ExitError); ok && err.ExitCode() == 1 {
-		if opts.extraButton != nil &&
-			*opts.extraButton == string(bytes.TrimSuffix(out, []byte{'\n'})) {
-			return false, ErrExtraButton
-		}
-		return false, nil
-	}
-	if err != nil {
-		return false, err
-	}
-	return true, err
+	_, ok, err := strResult(opts, out, err)
+	return ok, err
 }

notify_unix.go

@@ -8,9 +8,7 @@ import (
 
 func notify(text string, opts options) error {
 	args := []string{"--notification", "--text", text}
-	if opts.title != nil {
-		args = append(args, "--title", *opts.title)
-	}
+	args = appendTitle(args, opts)
 	switch opts.icon {
 	case ErrorIcon:
 		args = append(args, "--window-icon=dialog-error")

utils_unix.go

@@ -0,0 +1,78 @@
+// +build !windows
+
+package zenity
+
+import (
+	"bytes"
+	"os/exec"
+	"strconv"
+	"strings"
+
+	"github.com/ncruces/zenity/internal/zenutil"
+)
+
+func appendTitle(args []string, opts options) []string {
+	if opts.title != nil {
+		args = append(args, "--title", *opts.title)
+	}
+	return args
+}
+
+func appendButtons(args []string, opts options) []string {
+	if opts.okLabel != nil {
+		args = append(args, "--ok-label", *opts.okLabel)
+	}
+	if opts.cancelLabel != nil {
+		args = append(args, "--cancel-label", *opts.cancelLabel)
+	}
+	if opts.extraButton != nil {
+		args = append(args, "--extra-button", *opts.extraButton)
+	}
+	return args
+}
+
+func appendWidthHeight(args []string, opts options) []string {
+	if opts.width > 0 {
+		args = append(args, "--width", strconv.FormatUint(uint64(opts.width), 10))
+	}
+	if opts.height > 0 {
+		args = append(args, "--height", strconv.FormatUint(uint64(opts.height), 10))
+	}
+	return args
+}
+
+func appendIcon(args []string, opts options) []string {
+	switch opts.icon {
+	case ErrorIcon:
+		args = append(args, "--window-icon=error")
+	case WarningIcon:
+		args = append(args, "--window-icon=warning")
+	case InfoIcon:
+		args = append(args, "--window-icon=info")
+	case QuestionIcon:
+		args = append(args, "--window-icon=question")
+	}
+	return args
+}
+
+func strResult(opts options, out []byte, err error) (string, bool, error) {
+	out = bytes.TrimSuffix(out, []byte{'\n'})
+	if err, ok := err.(*exec.ExitError); ok && err.ExitCode() == 1 {
+		if opts.extraButton != nil && *opts.extraButton == string(out) {
+			return "", false, ErrExtraButton
+		}
+		return "", false, nil
+	}
+	if err != nil {
+		return "", false, err
+	}
+	return string(out), true, nil
+}
+
+func lstResult(opts options, out []byte, err error) ([]string, error) {
+	str, ok, err := strResult(opts, out, err)
+	if ok {
+		return strings.Split(str, zenutil.Separator), nil
+	}
+	return nil, err
+}