fix: detect encoding on windows (#266)

* fix: linting

* chore: bump version

cmd/version.go

@@ -1,4 +1,4 @@
 package cmd
 
 // Version - Wails version
-const Version = "v0.18.4"
+const Version = "v0.18.7-pre"

config.go

@@ -1,6 +1,9 @@
 package wails
 
-import "github.com/leaanthony/mewn"
+import (
+	"github.com/leaanthony/mewn"
+	"github.com/wailsapp/wails/runtime"
+)
 
 // AppConfig is the configuration structure used when creating a Wails App object
 type AppConfig struct {
@@ -65,7 +68,7 @@ func (a *AppConfig) merge(in *AppConfig) error {
 		a.CSS = in.CSS
 	}
 	if in.Title != "" {
-		a.Title = in.Title
+		a.Title = runtime.ProcessEncoding(in.Title)
 	}
 
 	if in.Colour != "" {

go.mod

@@ -2,6 +2,7 @@ module github.com/wailsapp/wails
 
 require (
 	github.com/Masterminds/semver v1.4.2
+	github.com/abadojack/whatlanggo v1.0.1
 	github.com/dchest/cssmin v0.0.0-20151210170030-fb8d9b44afdc // indirect
 	github.com/dchest/htmlmin v0.0.0-20150526090704-e254725e81ac
 	github.com/dchest/jsmin v0.0.0-20160823214000-faeced883947 // indirect
@@ -26,6 +27,7 @@ require (
 	golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529 // indirect
 	golang.org/x/net v0.0.0-20190509222800-a4d6f7feada5 // indirect
 	golang.org/x/sys v0.0.0-20190509141414-a5b02f93d862
+	golang.org/x/text v0.3.0
 	gopkg.in/AlecAivazis/survey.v1 v1.8.4
 	gopkg.in/yaml.v3 v3.0.0-20190709130402-674ba3eaed22
-)
+)

go.sum

@@ -2,6 +2,8 @@ github.com/Masterminds/semver v1.4.2 h1:WBLTQ37jOCzSLtXNdoo8bNM8876KhNqOKvrlGITg
 github.com/Masterminds/semver v1.4.2/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
 github.com/Netflix/go-expect v0.0.0-20180615182759-c93bf25de8e8 h1:xzYJEypr/85nBpB11F9br+3HUrpgb+fcm5iADzXXYEw=
 github.com/Netflix/go-expect v0.0.0-20180615182759-c93bf25de8e8/go.mod h1:oX5x61PbNXchhh0oikYAH+4Pcfw5LKv21+Jnpr6r6Pc=
+github.com/abadojack/whatlanggo v1.0.1 h1:19N6YogDnf71CTHm3Mp2qhYfkRdyvbgwWdd2EPxJRG4=
+github.com/abadojack/whatlanggo v1.0.1/go.mod h1:66WiQbSbJBIlOZMsvbKe5m6pzQovxCH9B/K8tQB2uoc=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -85,6 +87,7 @@ golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190509141414-a5b02f93d862 h1:rM0ROo5vb9AdYJi1110yjWGMej9ITfKddS89P3Fkhug=
 golang.org/x/sys v0.0.0-20190509141414-a5b02f93d862/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 gopkg.in/AlecAivazis/survey.v1 v1.8.4 h1:10xXXN3wgIhPheb5NI58zFgZv32Ana7P3Tl4shW+0Qc=
 gopkg.in/AlecAivazis/survey.v1 v1.8.4/go.mod h1:iBNOmqKz/NUbZx3bA+4hAGLRC7fSK7tgtVDT4tB22XA=

runtime/window.go

@@ -1,6 +1,54 @@
 package runtime
 
-import "github.com/wailsapp/wails/lib/interfaces"
+import (
+	"bytes"
+	"runtime"
+
+	"github.com/abadojack/whatlanggo"
+	"github.com/wailsapp/wails/lib/interfaces"
+	"golang.org/x/text/encoding"
+	"golang.org/x/text/encoding/japanese"
+	"golang.org/x/text/encoding/korean"
+	"golang.org/x/text/encoding/simplifiedchinese"
+	"golang.org/x/text/transform"
+)
+
+func detectEncoding(text string) (encoding.Encoding, string) {
+	// korean
+	var enc encoding.Encoding
+	info := whatlanggo.Detect(text)
+	//fmt.Println("Language:", info.Lang.String(), " Script:", whatlanggo.Scripts[info.Script], " Confidence: ", info.Confidence)
+	switch info.Lang.String() {
+	case "Korean":
+		enc = korean.EUCKR
+	case "Mandarin":
+		enc = simplifiedchinese.GBK
+	case "Japanese":
+		enc = japanese.EUCJP
+	}
+	return enc, info.Lang.String()
+}
+
+// ProcessEncoding attempts to convert CKJ strings to UTF-8
+func ProcessEncoding(text string) string {
+	if runtime.GOOS != "windows" {
+		return text
+	}
+
+	encoding, _ := detectEncoding(text)
+	if encoding != nil {
+		var bufs bytes.Buffer
+		wr := transform.NewWriter(&bufs, encoding.NewEncoder())
+		_, err := wr.Write([]byte(text))
+		defer wr.Close()
+		if err != nil {
+			return ""
+		}
+
+		return bufs.String()
+	}
+	return text
+}
 
 // Window exposes an interface for manipulating the window
 type Window struct {
@@ -31,6 +79,7 @@ func (r *Window) UnFullscreen() {
 
 // SetTitle sets the the window title
 func (r *Window) SetTitle(title string) {
+	title = ProcessEncoding(title)
 	r.renderer.SetTitle(title)
 }