File dialogs with zenity.

dialog/dialog.go

@@ -0,0 +1,6 @@
+package dialog
+
+type FileFilter struct {
+	Name string
+	Exts []string
+}

dialog/dialog_darwin.go

@@ -14,7 +14,7 @@ func OpenFile(title, defaultPath string, filters []FileFilter) (string, error) {
 		Operation:   "chooseFile",
 		Title:       title,
 		DefaultPath: defaultPath,
-		Filter:      toFilter(filters),
+		Filter:      appleFilters(filters),
 	})
 	out, err := cmd.Output()
 	if err != nil {
@@ -33,7 +33,7 @@ func OpenFiles(title, defaultPath string, filters []FileFilter) ([]string, error
 		Multiple:    true,
 		Title:       title,
 		DefaultPath: defaultPath,
-		Filter:      toFilter(filters),
+		Filter:      appleFilters(filters),
 	})
 	out, err := cmd.Output()
 	if err != nil {
@@ -45,7 +45,7 @@ func OpenFiles(title, defaultPath string, filters []FileFilter) ([]string, error
 	return strings.Split(string(out), "\x00"), nil
 }
 
-func SaveFile(title, defaultPath string, filters []FileFilter) (string, error) {
+func SaveFile(title, defaultPath string, confirmOverwrite bool, filters []FileFilter) (string, error) {
 	cmd := exec.Command("osascript", "-l", "JavaScript")
 	cmd.Stdin = scriptExpand(scriptData{
 		Operation:   "chooseFileName",
@@ -79,12 +79,7 @@ func PickFolder(title, defaultPath string) (string, error) {
 	return string(out), nil
 }
 
-type FileFilter struct {
+func appleFilters(filters []FileFilter) []string {
-	Name string
-	Exts []string
-}
-
-func toFilter(filters []FileFilter) []string {
 	var filter []string
 	for _, f := range filters {
 		for _, e := range f.Exts {

dialog/dialog_linux.go

@@ -0,0 +1,107 @@
+package dialog
+
+import (
+	"os/exec"
+	"strings"
+)
+
+func OpenFile(title, defaultPath string, filters []FileFilter) (string, error) {
+	args := []string{"--file-selection"}
+	if title != "" {
+		args = append(args, "--title="+title)
+	}
+	if defaultPath != "" {
+		args = append(args, "--filename="+defaultPath)
+	}
+	args = append(args, zenityFilters(filters)...)
+	cmd := exec.Command("zenity", args...)
+	out, err := cmd.Output()
+	if err != nil {
+		return "", err
+	}
+	if len(out) > 0 {
+		out = out[:len(out)-1]
+	}
+	return string(out), nil
+}
+
+func OpenFiles(title, defaultPath string, filters []FileFilter) ([]string, error) {
+	args := []string{"--file-selection", "--multiple", "--separator=\x1e"}
+	if title != "" {
+		args = append(args, "--title="+title)
+	}
+	if defaultPath != "" {
+		args = append(args, "--filename="+defaultPath)
+	}
+	args = append(args, zenityFilters(filters)...)
+	cmd := exec.Command("zenity", args...)
+	out, err := cmd.Output()
+	if err != nil {
+		return nil, err
+	}
+	if len(out) > 0 {
+		out = out[:len(out)-1]
+	}
+	return strings.Split(string(out), "\x1e"), nil
+}
+
+func SaveFile(title, defaultPath string, confirmOverwrite bool, filters []FileFilter) (string, error) {
+	args := []string{"--file-selection", "--save"}
+	if title != "" {
+		args = append(args, "--title="+title)
+	}
+	if defaultPath != "" {
+		args = append(args, "--filename="+defaultPath)
+	}
+	if confirmOverwrite {
+		args = append(args, "--confirm-overwrite")
+	}
+	args = append(args, zenityFilters(filters)...)
+	cmd := exec.Command("zenity", args...)
+	out, err := cmd.Output()
+	if err != nil {
+		return "", err
+	}
+	if len(out) > 0 {
+		out = out[:len(out)-1]
+	}
+	return string(out), nil
+}
+
+func PickFolder(title, defaultPath string) (string, error) {
+	args := []string{"--file-selection", "--directory"}
+	if title != "" {
+		args = append(args, "--title="+title)
+	}
+	if defaultPath != "" {
+		args = append(args, "--filename="+defaultPath)
+	}
+	cmd := exec.Command("zenity", args...)
+	out, err := cmd.Output()
+	if err != nil {
+		return "", err
+	}
+	if len(out) > 0 {
+		out = out[:len(out)-1]
+	}
+	return string(out), nil
+}
+
+func zenityFilters(filters []FileFilter) []string {
+	var res []string
+	for _, f := range filters {
+		var buf strings.Builder
+		buf.WriteString("--file-filter=")
+		if f.Name != "" {
+			buf.WriteString(f.Name)
+			buf.WriteRune('|')
+		}
+		for _, e := range f.Exts {
+			buf.WriteRune('*')
+			buf.WriteString(e)
+			buf.WriteRune(' ')
+		}
+		res = append(res, buf.String())
+	}
+	return res
+}

dialog/dialog_test.go

@@ -31,7 +31,7 @@ func TestOpenFiles(t *testing.T) {
 }
 
 func TestSaveFile(t *testing.T) {
-	ret, err := SaveFile("", "", []FileFilter{
+	ret, err := SaveFile("", "", true, []FileFilter{
 		{"Go files", []string{".go"}},
 		{"Web files", []string{".html", ".js", ".css"}},
 		{"Image files", []string{".png", ".ico"}},