Chinese font downloaded per-use basis - makes the android app require Internet permissions, but that was coming anyway

.gitignore

@@ -130,3 +130,4 @@ android/assets/GameSettings.json
 android/release/output.json
 android/release/android-release.apk
 android/release/release/android.aab
+android/assets/fonts/

android/AndroidManifest.xml

@@ -4,6 +4,8 @@
 
     <uses-sdk/>
 
+    <uses-permission android:name="android.permission.INTERNET" />
+
     <application
         android:allowBackup="true"
         android:icon="@drawable/uncivicon2"
@@ -18,6 +20,7 @@
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
+
         </activity>
     </application>
 

core/src/com/unciv/ui/utils/CameraStageBaseScreen.kt

@@ -15,6 +15,9 @@ import com.badlogic.gdx.scenes.scene2d.ui.*
 import com.badlogic.gdx.scenes.scene2d.utils.ClickListener
 import com.badlogic.gdx.utils.viewport.ExtendViewport
 import com.unciv.UnCivGame
+import com.unciv.models.gamebasics.GameBasics
+import java.io.FileOutputStream
+import java.net.URL
 
 open class CameraStageBaseScreen : Screen {
 
@@ -60,16 +63,21 @@ open class CameraStageBaseScreen : Screen {
 
     companion object {
         var skin = Skin(Gdx.files.internal("skin/flat-earth-ui.json"))
-                .apply {
-                    get<TextButton.TextButtonStyle>(TextButton.TextButtonStyle::class.java).font = getFont(20)
-                    get<Label.LabelStyle>(Label.LabelStyle::class.java).apply {
-                        font = getFont(18)
-                        fontColor= Color.WHITE
-                    }
-                    get<TextField.TextFieldStyle>(TextField.TextFieldStyle::class.java).font = getFont(18)
-                    get<SelectBox.SelectBoxStyle>(SelectBox.SelectBoxStyle::class.java).font = getFont(20)
-                    get<SelectBox.SelectBoxStyle>(SelectBox.SelectBoxStyle::class.java).listStyle.font = getFont(20)
-                }
+
+        init{
+            resetFonts()
+        }
+
+        fun resetFonts(){
+            skin.get<TextButton.TextButtonStyle>(TextButton.TextButtonStyle::class.java).font = getFont(20)
+            skin.get<Label.LabelStyle>(Label.LabelStyle::class.java).apply {
+                font = getFont(18)
+                fontColor= Color.WHITE
+            }
+            skin.get<TextField.TextFieldStyle>(TextField.TextFieldStyle::class.java).font = getFont(18)
+            skin.get<SelectBox.SelectBoxStyle>(SelectBox.SelectBoxStyle::class.java).font = getFont(20)
+            skin.get<SelectBox.SelectBoxStyle>(SelectBox.SelectBoxStyle::class.java).listStyle.font = getFont(20)
+        }
         internal var batch: Batch = SpriteBatch()
     }
 
@@ -114,24 +122,78 @@ fun Actor.center(parent:Stage){ centerX(parent); centerY(parent)}
 fun Label.setFontColor(color:Color): Label {style=Label.LabelStyle(style).apply { fontColor=color }; return this}
 
 
-val fontCache = HashMap<Int,BitmapFont>()
-fun getFont(size: Int): BitmapFont {
-    if(fontCache.containsKey(size)) return fontCache[size]!!
+// Contains e.g. "Arial 22", fontname and size, to BitmapFont
+val fontCache = HashMap<String,BitmapFont>()
+
+fun getFontForLanguage(): String {
+    if(UnCivGame.Current.settings.language.contains("Chinese")) return chineseFont
+    else return "Arial"
+}
+
+val chineseFont = "SimSun"
+
+fun getCharsForFont(font:String): String {
+    val defaultText = "ABCČĆDĐEFGHIJKLMNOPQRSŠTUVWXYZŽaäàâăbcčćdđeéfghiîjklmnoöpqrsșštțuüvwxyzž" +
+            "АБВГҐДЂЕЁЄЖЗЅИІЇЙЈКЛЉМНЊОПРСТЋУЎФХЦЧЏШЩЪЫЬЭЮЯабвгґдђеёєжзѕиіїйјклљмнњопрстћуўфхцчџшщъыьэюя" +
+            "ΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥΦΧΨΩαβγδεζηθικλμνξοπρστυφχψωάΆέΈέΉίϊΐΊόΌύΰϋΎΫΏĂÂÊÉÔƠƯăâêôơưáéèíóú1234567890" +
+            "‘?’'“!”(%)[#]{@}/&\\<-+÷×=>®©\$€£¥¢:;,.*|"
+    if(font=="Arial") return defaultText
+    if(font== chineseFont) {
+        val constants = "‘?’'“!”(%)[#]{@}/&\\<-+÷×=>®©\$€£¥¢:;,.*|"
+        val charSet = HashSet<Char>()
+        charSet.addAll(constants.asIterable())
+        charSet.addAll(defaultText.asIterable())
+        for (entry in GameBasics.Translations.entries) {
+            for(lang in entry.value){
+                if(lang.key.contains("Chinese")) charSet.addAll(lang.value.asIterable())
+            }
+        }
+        return charSet.joinToString()
+    }
+    return ""
+}
+
+fun download(link: String, path: String) {
+    val input = URL(link).openStream()
+    val output = FileOutputStream(Gdx.files.local(path).file())
+    input.use {
+        output.use {
+            input.copyTo(output)
+        }
+    }
+}
+
+fun getFont(size: Int): BitmapFont {
+    val fontForLanguage = getFontForLanguage()
+    val keyForFont = "$fontForLanguage $size"
+    if(fontCache.containsKey(keyForFont)) return fontCache[keyForFont]!!
+    val generator:FreeTypeFontGenerator
+
+    if(Gdx.files.internal("skin/$fontForLanguage.ttf").exists())
+        generator = FreeTypeFontGenerator(Gdx.files.internal("skin/$fontForLanguage.ttf"))
+    else {
+        val localPath = "fonts/$fontForLanguage.ttf"
+        if (!Gdx.files.local("fonts/$fontForLanguage.ttf").exists()) {
+            if(!Gdx.files.local("fonts").exists())
+                Gdx.files.local("fonts").mkdirs()
+
+            if(fontForLanguage == chineseFont)
+                download("https://github.com/micmro/Stylify-Me/raw/master/.fonts/SimSun.ttf",localPath)
+        }
+
+        generator = FreeTypeFontGenerator(Gdx.files.internal(localPath))
+    }
 
-    val generator = FreeTypeFontGenerator(Gdx.files.internal("skin/Arial.ttf"))
     val parameter = FreeTypeFontGenerator.FreeTypeFontParameter()
     parameter.size = size
     parameter.minFilter = Texture.TextureFilter.Linear
     parameter.magFilter = Texture.TextureFilter.Linear
 
-    parameter.characters = "ABCČĆDĐEFGHIJKLMNOPQRSŠTUVWXYZŽaäàâăbcčćdđeéfghiîjklmnoöpqrsșštțuüvwxyzž" +
-            "АБВГҐДЂЕЁЄЖЗЅИІЇЙЈКЛЉМНЊОПРСТЋУЎФХЦЧЏШЩЪЫЬЭЮЯабвгґдђеёєжзѕиіїйјклљмнњопрстћуўфхцчџшщъыьэюя" +
-            "ΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥΦΧΨΩαβγδεζηθικλμνξοπρστυφχψωάΆέΈέΉίϊΐΊόΌύΰϋΎΫΏĂÂÊÉÔƠƯăâêôơưáéèíóú1234567890" +
-            "‘?’'“!”(%)[#]{@}/&\\<-+÷×=>®©\$€£¥¢:;,.*|"
+    parameter.characters = getCharsForFont(fontForLanguage)
 
     val font = generator.generateFont(parameter)
     generator.dispose() // don't forget to dispose to avoid memory leaks!
-    fontCache[size]=font
+    fontCache[keyForFont]=font
     return font
 }
 

core/src/com/unciv/ui/worldscreen/optionstable/WorldScreenDisplayOptionsTable.kt

@@ -51,6 +51,7 @@ class WorldScreenDisplayOptionsTable : PopupTable(){
             override fun changed(event: ChangeEvent?, actor: Actor?) {
                 UnCivGame.Current.settings.language = languageSelectBox.selected.language
                 UnCivGame.Current.settings.save()
+                CameraStageBaseScreen.resetFonts()
                 UnCivGame.Current.worldScreen = WorldScreen()
                 UnCivGame.Current.setWorldScreen()
                 UnCivGame.Current.worldScreen.stage.addActor(WorldScreenDisplayOptionsTable())