Update FontsModule.kt
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OTKUSteyler
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1 changed files with 119 additions and 103 deletions
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@ -1,3 +1,5 @@
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@file:Suppress("DEPRECATION")
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package GoonXposed.xposed.modules.appearance
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import android.content.res.AssetManager
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@ -6,6 +8,8 @@ import android.graphics.Typeface.CustomFallbackBuilder
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import android.graphics.fonts.Font
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import android.graphics.fonts.FontFamily
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import android.os.Build
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import de.robv.android.xposed.XC_MethodReplacement
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import de.robv.android.xposed.XposedHelpers
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import de.robv.android.xposed.callbacks.XC_LoadPackage
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import GoonXposed.xposed.Constants
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import GoonXposed.xposed.Module
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@ -13,23 +17,17 @@ import GoonXposed.xposed.Utils.Companion.JSON
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import GoonXposed.xposed.Utils.Log
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import GoonXposed.xposed.asDir
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import GoonXposed.xposed.asFile
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import GoonXposed.xposed.hook
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import GoonXposed.xposed.method
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import GoonXposed.xposed.safeLoadClass
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import io.ktor.client.HttpClient
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import io.ktor.client.call.body
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import io.ktor.client.engine.cio.CIO
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import io.ktor.client.plugins.HttpRedirect
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import io.ktor.client.plugins.UserAgent
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import io.ktor.client.request.get
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import io.ktor.client.statement.HttpResponse
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import io.ktor.http.HttpStatusCode
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import kotlinx.coroutines.CoroutineScope
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import kotlinx.coroutines.Dispatchers
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import kotlinx.coroutines.async
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import kotlinx.coroutines.awaitAll
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import kotlinx.coroutines.launch
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import io.ktor.client.*
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import io.ktor.client.call.*
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import io.ktor.client.engine.cio.*
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import io.ktor.client.plugins.*
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import io.ktor.client.request.*
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import io.ktor.client.statement.*
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import io.ktor.http.*
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import kotlinx.coroutines.*
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import kotlinx.serialization.Serializable
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import kotlinx.serialization.json.JsonObjectBuilder
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import kotlinx.serialization.json.put
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import java.io.File
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import java.io.IOException
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@ -41,10 +39,19 @@ data class FontDefinition(
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val main: Map<String, String>,
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)
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/**
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* Custom font loading + ReactFontManager hijack.
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*/
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object FontsModule : Module() {
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private val EXTENSIONS = arrayOf("", "_bold", "_italic", "_bold_italic")
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private val FILE_EXTENSIONS = arrayOf(".ttf", ".otf")
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private const val FONTS_ASSET_PATH = "fonts/"
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private lateinit var fontsDir: File
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private var fontsDownloadsDir: File? = null
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private var fontsAbsPath: String? = null
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override fun buildPayload(builder: JsonObjectBuilder) {
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builder.put("fontPatch", 2)
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}
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override fun onLoad(packageParam: XC_LoadPackage.LoadPackageParam) = with(packageParam) {
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// ReactFontManager hijack runs regardless of fonts.json presence; it falls back to the
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// default Typeface chain if no custom font file is found.
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@ -52,43 +59,47 @@ object FontsModule : Module() {
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"com.facebook.react.common.assets.ReactFontManager\$Companion",
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"com.facebook.react.views.text.ReactFontManager\$Companion",
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).forEach { clsName ->
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classLoader.safeLoadClass(clsName)?.let { cls ->
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XposedHelpers.findClassIfExists(clsName, classLoader)?.let { cls ->
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runCatching {
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cls.method("createAssetTypeface", String::class.java, Int::class.java, AssetManager::class.java).hook {
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before {
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val fontFamilyName: String = args[0].toString()
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val style: Int = args[1] as Int
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val assetManager: AssetManager = args[2] as AssetManager
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result = FontsState.createAssetTypeface(fontFamilyName, style, assetManager)
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}
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}
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XposedHelpers.findAndHookMethod(
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cls,
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"createAssetTypeface",
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String::class.java,
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Int::class.java,
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AssetManager::class.java,
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object : XC_MethodReplacement() {
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override fun replaceHookedMethod(param: MethodHookParam): Any? {
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val fontFamilyName: String = param.args[0].toString()
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val style: Int = param.args[1] as Int
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val assetManager: AssetManager = param.args[2] as AssetManager
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return createAssetTypeface(fontFamilyName, style, assetManager)
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}
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},
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)
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}.onFailure { e ->
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Log.e("Failed to hook ReactFontManager: ${e.message}")
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}
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}
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}
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}
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override fun onContext(context: android.content.Context) {
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val dataDir = context.dataDir.absolutePath
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val fontDefFile = File(dataDir, "${Constants.FILES_DIR}/fonts.json").asFile()
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if (!fontDefFile.exists()) return
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val fontDefFile = File(appInfo.dataDir, "${Constants.FILES_DIR}/fonts.json")
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if (!fontDefFile.exists()) return@with
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val fontDef = try {
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JSON.decodeFromString<FontDefinition>(fontDefFile.readText())
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} catch (e: Throwable) {
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Log.w("fonts.json malformed: ${e.message}")
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return
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return@with
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}
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val setName = fontDef.name ?: return
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val setName = fontDef.name ?: return@with
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val downloadsDir = File(dataDir, "${Constants.FILES_DIR}/downloads/fonts").asDir()
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val setDir = File(downloadsDir, setName).asDir()
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FontsState.fontsDownloadsDir = downloadsDir
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FontsState.fontsAbsPath = setDir.absolutePath + "/"
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val downloadsDir = File(appInfo.dataDir, "${Constants.FILES_DIR}/downloads/fonts").asDir()
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fontsDir = File(downloadsDir, setName).asDir()
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fontsDownloadsDir = downloadsDir
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fontsAbsPath = fontsDir.absolutePath + "/"
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// Prune stale font files for this set.
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setDir.listFiles()?.forEach { file ->
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fontsDir.listFiles()?.forEach { file ->
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val fileName = file.name
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if (!fileName.startsWith(".")) {
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val fontName = fileName.split('.')[0]
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@ -99,18 +110,22 @@ object FontsModule : Module() {
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}
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}
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// Font files are normally downloaded by the JS side; this is a safety net for
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// font packs that only ship a fonts.json pointing at remote URLs.
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CoroutineScope(Dispatchers.IO).launch {
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fontDef.main.entries.map { (name, url) ->
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async {
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try {
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Log.i("Downloading $name from $url")
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val ext = FontsState.FILE_EXTENSIONS.firstOrNull { url.endsWith(it) } ?: ".ttf"
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val file = File(setDir, "$name$ext").asFile()
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val ext = FILE_EXTENSIONS.firstOrNull { url.endsWith(it) } ?: ".ttf"
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val file = File(fontsDir, "$name$ext")
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if (file.exists()) return@async
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val response: HttpResponse = HttpClient(CIO) {
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install(UserAgent) { agent = Constants.USER_AGENT }
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install(HttpRedirect) {}
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}.use { it.get(url) }
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if (response.status == HttpStatusCode.OK) {
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file.writeBytes(response.body())
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}
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@ -121,66 +136,6 @@ object FontsModule : Module() {
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}.awaitAll()
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}
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}
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}
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/**
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* Holds the per-process font-state used by the `createAssetTypeface` hijack.
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*/
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private object FontsState {
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val EXTENSIONS = arrayOf("", "_bold", "_italic", "_bold_italic")
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val FILE_EXTENSIONS = arrayOf(".ttf", ".otf")
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const val FONTS_ASSET_PATH = "fonts/"
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@Volatile
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var fontsDownloadsDir: File? = null
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@Volatile
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var fontsAbsPath: String? = null
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fun createAssetTypeface(
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rawName: String,
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style: Int,
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assetManager: AssetManager,
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): Typeface? {
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val fontFamilyNames = rawName.split(",").map { it.trim() }.filter { it.isNotEmpty() }.toTypedArray()
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var fontFamilyName = rawName
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if (fontFamilyNames.size > 1) {
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fontFamilyName = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
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return createAssetTypefaceWithFallbacks(fontFamilyNames, style, assetManager)
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} else {
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fontFamilyNames[0]
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}
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}
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val extension = EXTENSIONS.getOrElse(style) { "" }
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try {
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for (fileExt in FILE_EXTENSIONS) {
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val split = fontFamilyName.split(":")
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if (split.size != 2) break
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val (customName, refName) = split
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val downloads = fontsDownloadsDir ?: break
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val file = File(downloads, "$customName/$refName.$fileExt")
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if (!file.exists()) continue
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return Typeface.createFromFile(file.absolutePath)
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}
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} catch (_: Throwable) {
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}
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for (fontRootPath in arrayOf(fontsAbsPath, FONTS_ASSET_PATH).filterNotNull()) {
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for (fileExt in FILE_EXTENSIONS) {
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val fileName = "$fontRootPath$fontFamilyName$extension$fileExt"
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return try {
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if (fileName[0] == '/') Typeface.createFromFile(fileName)
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else Typeface.createFromAsset(assetManager, fileName)
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} catch (_: RuntimeException) {
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continue
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}
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}
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}
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return Typeface.create(fontFamilyName, style)
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}
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private fun createAssetTypefaceWithFallbacks(
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fontFamilyNames: Array<String>,
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@ -188,7 +143,11 @@ private object FontsState {
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assetManager: AssetManager,
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): Typeface? {
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if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) return null
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val fontFamilies: MutableList<FontFamily> = ArrayList()
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// Iterate over the list of fontFamilyNames, constructing new FontFamily objects
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// for use in the CustomFallbackBuilder below.
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for (fontFamilyName in fontFamilyNames) {
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try {
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for (fileExt in FILE_EXTENSIONS) {
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@ -221,10 +180,67 @@ private object FontsState {
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}
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}
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// If there's some problem constructing fonts, fall back to the default behavior.
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if (fontFamilies.isEmpty()) return createAssetTypeface(fontFamilyNames[0], style, assetManager)
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val fallbackBuilder = CustomFallbackBuilder(fontFamilies[0])
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for (i in 1 until fontFamilies.size) fallbackBuilder.addCustomFallback(fontFamilies[i])
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for (i in 1 until fontFamilies.size) {
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fallbackBuilder.addCustomFallback(fontFamilies[i])
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}
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return fallbackBuilder.build()
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}
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private fun createAssetTypeface(
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rawName: String,
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style: Int,
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assetManager: AssetManager,
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): Typeface? {
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// This logic attempts to safely check if the frontend code is attempting to use
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// fallback fonts, and if it is, to use the fallback typeface creation logic.
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val fontFamilyNames = rawName.split(",").map { it.trim() }.filter { it.isNotEmpty() }.toTypedArray()
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var fontFamilyName = rawName
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// If there are multiple font family names:
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// For newer versions of Android, construct a Typeface with fallbacks
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// For older versions of Android, ignore all the fallbacks and just use the first font family
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if (fontFamilyNames.size > 1) {
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fontFamilyName = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
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return createAssetTypefaceWithFallbacks(fontFamilyNames, style, assetManager)
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} else {
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fontFamilyNames[0]
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}
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}
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val extension = EXTENSIONS.getOrElse(style) { "" }
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try {
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for (fileExt in FILE_EXTENSIONS) {
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val split = fontFamilyName.split(":")
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if (split.size != 2) break
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val (customName, refName) = split
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val downloads = fontsDownloadsDir ?: break
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val file = File(downloads, "$customName/$refName.$fileExt")
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if (!file.exists()) continue
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return Typeface.createFromFile(file.absolutePath)
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}
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} catch (_: Throwable) {
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}
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// Lastly, after all those checks above, this is the original RN logic for
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// getting the typeface.
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for (fontRootPath in arrayOf(fontsAbsPath, FONTS_ASSET_PATH).filterNotNull()) {
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for (fileExt in FILE_EXTENSIONS) {
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val fileName = "$fontRootPath$fontFamilyName$extension$fileExt"
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return try {
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if (fileName[0] == '/') Typeface.createFromFile(fileName)
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else Typeface.createFromAsset(assetManager, fileName)
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} catch (_: RuntimeException) {
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// If the typeface asset does not exist, try another extension.
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continue
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}
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}
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}
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return Typeface.create(fontFamilyName, style)
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}
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}
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