1 files changed, 76 insertions(+), 0 deletions(-)

A bidi/bidi.go

@@ 0,0 1,76 @@
+// SPDX-License-Identifier: Unlicense OR MIT
+
+package main
+
+// A simple Gio program. See https://gioui.org for more information.
+
+import (
+	_ "embed"
+	"fmt"
+	"log"
+	"os"
+
+	"gioui.org/app"
+	"gioui.org/io/system"
+	"gioui.org/layout"
+	"gioui.org/op"
+	"gioui.org/text"
+	"gioui.org/widget"
+	"gioui.org/widget/material"
+
+	nsareg "eliasnaur.com/font/noto/sans/arabic/regular"
+	"eliasnaur.com/font/roboto/robotoregular"
+	"gioui.org/font/opentype"
+)
+
+func main() {
+	go func() {
+		w := app.NewWindow()
+		if err := loop(w); err != nil {
+			log.Fatal(err)
+		}
+		os.Exit(0)
+	}()
+	app.Main()
+}
+
+type (
+	C = layout.Context
+	D = layout.Dimensions
+)
+
+func loop(w *app.Window) error {
+	arabicFace, _ := opentype.Parse(nsareg.TTF)
+	englishFace, _ := opentype.Parse(robotoregular.TTF)
+	collection := []text.FontFace{}
+	collection = append(collection, text.FontFace{Font: text.Font{Typeface: "Latin"}, Face: englishFace})
+	collection = append(collection, text.FontFace{Font: text.Font{Typeface: "Arabic"}, Face: arabicFace})
+	th := material.NewTheme(collection)
+	var ed widget.Editor
+	txt := "Hello أهلا my good friend صديقي الجيد bidirectional text نص ثنائي الاتجاه."
+	ed.SetText(txt)
+	ed.Focus()
+	ed.Alignment = text.Middle
+	var ops op.Ops
+	for {
+		e := <-w.Events()
+		switch e := e.(type) {
+		case system.DestroyEvent:
+			return e.Err
+		case system.FrameEvent:
+			gtx := layout.NewContext(&ops, e)
+			layout.Flex{Axis: layout.Vertical}.Layout(gtx,
+				layout.Rigid(func(gtx C) D {
+					med := material.Editor(th, &ed, "")
+					med.TextSize = material.H3(th, "").TextSize
+					return med.Layout(gtx)
+				}),
+				layout.Rigid(func(gtx C) D {
+					start, end := ed.Selection()
+					return material.Body1(th, fmt.Sprintf("Selection start %d, end %d", start, end)).Layout(gtx)
+				}),
+			)
+			e.Frame(gtx.Ops)
+		}
+	}
+}