Improve compatibility with zenity.

cmd/zenity/main.go

@@ -520,9 +520,13 @@ func loadFlags() []zenity.Option {
 	if ellipsize {
 		opts = append(opts, zenity.Ellipsize())
 	}
-	if !noMarkup {
+	switch {
-		switch {
+	case entryDlg:
-		case errorDlg, infoDlg, warningDlg, questionDlg:
+		text = zencmd.StripMnemonic(text)
+	case calendarDlg, progressDlg:
+		text = zencmd.StripMarkup(text)
+	case errorDlg, infoDlg, warningDlg, questionDlg:
+		if !noMarkup {
 			text = zencmd.StripMarkup(text)
 		}
 	}

date_unix.go

@@ -10,7 +10,7 @@ import (
 )
 
 func calendar(text string, opts options) (time.Time, error) {
-	args := []string{"--calendar", "--text", text, "--date-format", zenutil.DateFormat}
+	args := []string{"--calendar", "--text", quoteMarkup(text), "--date-format", zenutil.DateFormat}
 	args = appendGeneral(args, opts)
 	args = appendButtons(args, opts)
 	args = appendWidthHeight(args, opts)

entry_unix.go

@@ -2,12 +2,10 @@
 
 package zenity
 
-import (
+import "github.com/ncruces/zenity/internal/zenutil"
-	"github.com/ncruces/zenity/internal/zenutil"
-)
 
 func entry(text string, opts options) (string, error) {
-	args := []string{"--entry", "--text", text}
+	args := []string{"--entry", "--text", quoteMnemonics(text)}
 	args = appendGeneral(args, opts)
 	args = appendButtons(args, opts)
 	args = appendWidthHeight(args, opts)

internal/zencmd/markup.go

@@ -12,18 +12,18 @@ func StripMarkup(s string) string {
 	// https://docs.gtk.org/Pango/pango_markup.html
 
 	dec := xml.NewDecoder(strings.NewReader(s))
-	var buf strings.Builder
+	var res strings.Builder
 
 	for {
 		t, err := dec.Token()
 		if err == io.EOF {
-			return buf.String()
+			return res.String()
 		}
 		if err != nil {
 			return s
 		}
 		if t, ok := t.(xml.CharData); ok {
-			buf.Write(t)
+			res.Write(t)
 		}
 	}
 }

internal/zencmd/markup_test.go

@@ -1,8 +1,6 @@
 package zencmd
 
-import (
+import "testing"
-	"testing"
-)
 
 var markupTests = []struct {
 	data string

internal/zencmd/mnemonic.go

@@ -0,0 +1,25 @@
+package zencmd
+
+import "strings"
+
+// StripMnemonic is internal.
+func StripMnemonic(s string) string {
+	// Strips mnemonics described in:
+	// https: //docs.gtk.org/gtk4/class.Label.html#mnemonics
+
+	var res strings.Builder
+
+	underscore := false
+	for _, b := range []byte(s) {
+		switch {
+		case underscore:
+			underscore = false
+		case b == '_':
+			underscore = true
+			continue
+		}
+		res.WriteByte(b)
+	}
+
+	return res.String()
+}

internal/zencmd/mnemonic_test.go

@@ -0,0 +1,46 @@
+package zencmd
+
+import (
+	"strings"
+	"testing"
+)
+
+var mnemonicTests = []struct {
+	data string
+	want string
+}{
+	{"", ""},
+	{"abc", "abc"},
+	{"_abc", `abc`},
+	{"_a_b_c_", "abc"},
+	{"a__c", `a_c`},
+	{"a___c", `a_c`},
+	{"a____c", `a__c`},
+}
+
+func TestStripMnemonic(t *testing.T) {
+	t.Parallel()
+	for _, test := range mnemonicTests {
+		if got := StripMnemonic(test.data); got != test.want {
+			t.Errorf("StripMnemonic(%q) = %q; want %q", test.data, got, test.want)
+		}
+	}
+}
+
+func FuzzStripMnemonic(f *testing.F) {
+	for _, test := range mnemonicTests {
+		f.Add(test.data)
+	}
+
+	f.Fuzz(func(t *testing.T, s string) {
+		q := quoteMnemonic(s)
+		u := StripMnemonic(q)
+		if s != u {
+			t.Errorf("strip(quote(%q)) = strip(%q) = %q", s, q, u)
+		}
+	})
+}
+
+func quoteMnemonic(s string) string {
+	return strings.ReplaceAll(s, "_", "__")
+}

internal/zencmd/unescape_test.go

@@ -1,8 +1,6 @@
 package zencmd
 
-import (
+import "testing"
-	"testing"
-)
 
 var unescapeTests = []struct {
 	data string

util.go

@@ -2,6 +2,7 @@ package zenity
 
 import (
 	"bytes"
+	"encoding/xml"
 	"fmt"
 	"os/exec"
 	"strconv"
@@ -14,6 +15,19 @@ func quoteAccelerators(text string) string {
 	return strings.ReplaceAll(text, "&", "&&")
 }
 
+func quoteMnemonics(text string) string {
+	return strings.ReplaceAll(text, "_", "__")
+}
+
+func quoteMarkup(text string) string {
+	var res strings.Builder
+	err := xml.EscapeText(&res, []byte(text))
+	if err != nil {
+		return text
+	}
+	return res.String()
+}
+
 func appendGeneral(args []string, opts options) []string {
 	if opts.title != nil {
 		args = append(args, "--title", *opts.title)

util_test.go

@@ -31,6 +31,49 @@ func Test_quoteAccelerators(t *testing.T) {
 	}
 }
 
+func Test_quoteMnemonics(t *testing.T) {
+	t.Parallel()
+	tests := []struct {
+		name string
+		text string
+		want string
+	}{
+		{name: "None", text: "abc", want: "abc"},
+		{name: "One", text: "_abc", want: "__abc"},
+		{name: "Two", text: "_a_bc", want: "__a__bc"},
+		{name: "Three", text: "ab__c", want: "ab____c"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := quoteMnemonics(tt.text); got != tt.want {
+				t.Errorf("quoteMnemonics(%q) = %q; want %q", tt.text, got, tt.want)
+			}
+		})
+	}
+}
+
+func Test_quoteMarkup(t *testing.T) {
+	t.Parallel()
+	tests := []struct {
+		name string
+		text string
+		want string
+	}{
+		{name: "None", text: `abc`, want: "abc"},
+		{name: "LT", text: `<`, want: "&lt;"},
+		{name: "Amp", text: `&`, want: "&amp;"},
+		{name: "Quot", text: `"`, want: "&#34;"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := quoteMarkup(tt.text); got != tt.want {
+				t.Errorf("quoteMarkup(%q) = %q; want %q", tt.text, got, tt.want)
+			}
+		})
+	}
+}
+
 func Test_appendGeneral(t *testing.T) {
 	t.Parallel()
 	got := appendGeneral(nil, options{