start to add Languages in Settings

sysgo/UI/lang_manager.go

@@ -0,0 +1,173 @@
+package UI
+
+import (
+  "fmt"
+  "strings"
+  "io/ioutil"
+  "path/filepath"
+  "github.com/veandco/go-sdl2/ttf"
+	"github.com/go-ini/ini"
+  
+)
+
+
+func sliceToInt(s []int) int {
+    res := 0
+    op := 1
+    for i := len(s) - 1; i >= 0; i-- {
+        res += s[i] * op
+        op *= 10
+    }
+    return res
+}
+
+
+func ParseNum(s string) []int {
+	nLen := 0
+	for i := 0; i < len(s); i++ {
+		if b := s[i]; '0' <= b && b <= '9' {
+			nLen++
+		}
+	}
+	var n = make([]int, 0, nLen)
+	for i := 0; i < len(s); i++ {
+		if b := s[i]; '0' <= b && b <= '9' {
+			n = append(n, int(b)-'0')
+		}
+	}
+	return n
+}
+
+func GetNumberFromString(s string) int {
+  is := ParseNum(s)
+  
+  return sliceToInt(is)
+
+}
+
+type LangManager struct {
+  
+  Langs map[string]string
+  ConfigFilename string
+  
+  CJKMode bool
+}
+
+func NewLangManager() *LangManager {
+  p := &LangManager{}
+  
+  p.ConfigFilename = "00_English.ini"
+  p.CJKMode = false
+  
+  return p
+}
+
+func (self *LangManager) Init() {
+  if self.Langs == nil {
+    self.SetLangs()
+  }
+}
+
+func (self *LangManager) UpdateLang() {
+  
+  self.Langs  = nil
+  self.SetLangs()
+
+}
+
+func (self *LangManager) IsCJKMode() bool {
+  var latins = [1]string{"English"}
+  
+  self.CJKMode= false
+  
+  for _,v := range latins {
+    if strings.HasPrefix(self.ConfigFilename,v) {
+      self.CJKMode = false
+      break
+    }
+  }
+  
+  return self.CJKMode
+}
+
+func (self *LangManager) SetLangs() {
+  
+  self.Langs = make(map[string]string)
+  fname := "sysgo/.lang"
+  
+  load_opts := ini.LoadOptions{
+		IgnoreInlineComment:true,
+	}
+  
+  if FileExists(fname) {
+    config_bytes,err := ioutil.ReadFile(fname)
+    if err == nil {
+      self.ConfigFilename = strings.Trim(string(config_bytes),"\r\n ")
+      if len(self.ConfigFilename) < 3 {
+        self.ConfigFilename = "00_English.ini"
+      }
+    }
+  }else {
+    System("touch " + fname)
+  }
+  
+  config_file_relative_path := filepath.Join("sysgo","langs",self.ConfigFilename)
+  
+  if FileExists(config_file_relative_path) == false {
+    return
+  }
+  
+  //no matter what ,we must have 00_English.ini
+	cfg, err := ini.LoadSources(load_opts, config_file_relative_path)
+	if err != nil {
+		fmt.Printf("Fail to read file: %v\n", err)
+		return
+	}
+  
+	section := cfg.Section("Langs")
+	if section != nil {
+		opts := section.KeyStrings()
+    for _,v := range opts {
+      self.Langs[v] = section.Key(v).String()
+		}
+	}
+  
+}
+
+func (self *LangManager) Tr(english_key_str string) string {
+  
+  if self.Langs == nil  {
+    return english_key_str
+  }
+  
+  if len(self.Langs) == 0 {
+    return english_key_str
+  }
+
+  if v,ok := self.Langs[english_key_str]; ok {
+  
+    return v
+  }
+  return english_key_str
+}
+
+func (self *LangManager) TrFont(orig_font_str string) *ttf.Font {
+  
+  font_size_number := GetNumberFromString(orig_font_str)
+  if font_size_number > 120 {
+    panic("font string format error")
+  }
+  
+  if strings.Contains(self.ConfigFilename,"English.ini") {
+    return Fonts[orig_font_str]
+  }else {
+    if font_size_number > 28 {
+      panic("cjk font size over 28")
+    }
+  }
+
+  return Fonts[  fmt.Sprintf("notosanscjk%d",font_size_number) ]
+
+}
+
+var MyLangManager *LangManager