extension settings

app/src/main/java/eu/kanade/tachiyomi/util/storage/DiskUtil.kt

@@ -0,0 +1,117 @@
+package eu.kanade.tachiyomi.util.storage
+
+import android.content.Context
+import android.media.MediaScannerConnection
+import android.net.Uri
+import android.os.Environment
+import android.os.StatFs
+import androidx.core.content.ContextCompat
+import com.hippo.unifile.UniFile
+import eu.kanade.tachiyomi.util.lang.Hash
+import java.io.File
+
+object DiskUtil {
+
+    fun hashKeyForDisk(key: String): String {
+        return Hash.md5(key)
+    }
+
+    fun getDirectorySize(f: File): Long {
+        var size: Long = 0
+        if (f.isDirectory) {
+            for (file in f.listFiles().orEmpty()) {
+                size += getDirectorySize(file)
+            }
+        } else {
+            size = f.length()
+        }
+        return size
+    }
+
+    /**
+     * Gets the available space for the disk that a file path points to, in bytes.
+     */
+    fun getAvailableStorageSpace(f: UniFile): Long {
+        return try {
+            val stat = StatFs(f.uri.path)
+            stat.availableBlocksLong * stat.blockSizeLong
+        } catch (_: Exception) {
+            -1L
+        }
+    }
+
+    /**
+     * Returns the root folders of all the available external storages.
+     */
+    fun getExternalStorages(context: Context): List<File> {
+        return ContextCompat.getExternalFilesDirs(context, null)
+            .filterNotNull()
+            .mapNotNull {
+                val file = File(it.absolutePath.substringBefore("/Android/"))
+                val state = Environment.getExternalStorageState(file)
+                if (state == Environment.MEDIA_MOUNTED || state == Environment.MEDIA_MOUNTED_READ_ONLY) {
+                    file
+                } else {
+                    null
+                }
+            }
+    }
+
+    /**
+     * Don't display downloaded chapters in gallery apps creating `.nomedia`.
+     */
+    fun createNoMediaFile(dir: UniFile?, context: Context?) {
+        if (dir != null && dir.exists()) {
+            val nomedia = dir.findFile(NOMEDIA_FILE)
+            if (nomedia == null) {
+                dir.createFile(NOMEDIA_FILE)
+                context?.let { scanMedia(it, dir.uri) }
+            }
+        }
+    }
+
+    /**
+     * Scans the given file so that it can be shown in gallery apps, for example.
+     */
+    fun scanMedia(context: Context, uri: Uri) {
+        MediaScannerConnection.scanFile(context, arrayOf(uri.path), null, null)
+    }
+
+    /**
+     * Mutate the given filename to make it valid for a FAT filesystem,
+     * replacing any invalid characters with "_". This method doesn't allow hidden files (starting
+     * with a dot), but you can manually add it later.
+     */
+    fun buildValidFilename(origName: String): String {
+        val name = origName.trim('.', ' ')
+        if (name.isEmpty()) {
+            return "(invalid)"
+        }
+        val sb = StringBuilder(name.length)
+        name.forEach { c ->
+            if (isValidFatFilenameChar(c)) {
+                sb.append(c)
+            } else {
+                sb.append('_')
+            }
+        }
+        // Even though vfat allows 255 UCS-2 chars, we might eventually write to
+        // ext4 through a FUSE layer, so use that limit minus 15 reserved characters.
+        return sb.toString().take(240)
+    }
+
+    /**
+     * Returns true if the given character is a valid filename character, false otherwise.
+     */
+    private fun isValidFatFilenameChar(c: Char): Boolean {
+        if (0x00.toChar() <= c && c <= 0x1f.toChar()) {
+            return false
+        }
+        return when (c) {
+            '"', '*', '/', ':', '<', '>', '?', '\\', '|', 0x7f.toChar() -> false
+            else -> true
+        }
+    }
+
+    const val NOMEDIA_FILE = ".nomedia"
+}

app/src/main/java/eu/kanade/tachiyomi/util/view/EditTextPreferenceExtensions.kt

@@ -0,0 +1,10 @@
+@file:Suppress("PackageDirectoryMismatch")
+
+package androidx.preference
+
+/**
+ * Returns package-private [EditTextPreference.getOnBindEditTextListener]
+ */
+fun EditTextPreference.getOnBindEditTextListener(): EditTextPreference.OnBindEditTextListener? {
+    return onBindEditTextListener
+}