added visual settings (font/spacing/weight), imprpved linux "show file", added "share/show" to a library card

composeApp/src/jvmMain/kotlin/net/sergeych/toread/BookPlatform.jvm.kt

@@ -293,22 +293,55 @@ actual suspend fun markLibraryFavorite(fileId: String, favorite: Boolean): Boole
 
 actual suspend fun shareLibraryBookFile(fileId: String): Boolean = false
 
-actual suspend fun viewLibraryBookFile(fileId: String): Boolean = withContext(Dispatchers.IO) {
+actual suspend fun viewLibraryBookFile(folder: String, fileName: String): Boolean = withContext(Dispatchers.IO) {
     runCatching {
-        if (!Desktop.isDesktopSupported()) return@withContext false
-        val file = openLibraryDatabase().useLibrary { db ->
-            db.files.get(fileId)?.storageUri?.let(::File)?.takeIf { it.isFile }
-        } ?: return@withContext false
-        val desktop = Desktop.getDesktop()
-        if (desktop.isSupported(Desktop.Action.BROWSE_FILE_DIR)) {
-            desktop.browseFileDirectory(file)
-        } else {
-            desktop.open(file.parentFile ?: file)
-        }
-        true
+        val directory = File(folder).takeIf { it.isDirectory } ?: return@withContext false
+        val file = File(directory, fileName).takeIf { it.isFile } ?: return@withContext false
+        selectOrOpenBookFile(directory, file)
     }.getOrDefault(false)
 }
 
+private fun selectOrOpenBookFile(directory: File, file: File): Boolean {
+    if (isLinuxDesktop() && trySelectLinuxFile(file)) return true
+    if (!Desktop.isDesktopSupported()) return false
+
+    val desktop = Desktop.getDesktop()
+    return when {
+        desktop.isSupported(Desktop.Action.BROWSE_FILE_DIR) -> {
+            desktop.browseFileDirectory(file)
+            true
+        }
+        desktop.isSupported(Desktop.Action.OPEN) -> {
+            desktop.open(directory)
+            true
+        }
+        else -> false
+    }
+}
+
+private fun isLinuxDesktop(): Boolean =
+    System.getProperty("os.name").orEmpty().lowercase(Locale.ROOT).contains("linux")
+
+private fun trySelectLinuxFile(file: File): Boolean =
+    runCatching {
+        val process = ProcessBuilder(
+            "dbus-send",
+            "--session",
+            "--dest=org.freedesktop.FileManager1",
+            "--type=method_call",
+            "/org/freedesktop/FileManager1",
+            "org.freedesktop.FileManager1.ShowItems",
+            "array:string:${file.toURI()}",
+            "string:",
+        ).start()
+        if (process.waitFor(2, TimeUnit.SECONDS)) {
+            process.exitValue() == 0
+        } else {
+            process.destroyForcibly()
+            false
+        }
+    }.getOrDefault(false)
+
 actual suspend fun loadBookInfoExtras(fileId: String): BookInfoExtras = withContext(Dispatchers.IO) {
     openLibraryDatabase().useLibrary { db ->
         val file = db.files.get(fileId) ?: return@useLibrary BookInfoExtras()
@@ -367,6 +400,18 @@ actual suspend fun saveThemeMode(mode: ThemeMode) = withContext(Dispatchers.IO)
     }
 }
 
+actual suspend fun loadReaderFontSettings(): ReaderFontSettings = withContext(Dispatchers.IO) {
+    openLibraryDatabase().useLibrary { db ->
+        readerFontSettingsFromStorageValue(db.getAppFlag(ReaderFontSettingsFlag))
+    }
+}
+
+actual suspend fun saveReaderFontSettings(settings: ReaderFontSettings) = withContext(Dispatchers.IO) {
+    openLibraryDatabase().useLibrary { db ->
+        db.setAppFlag(ReaderFontSettingsFlag, settings.toStorageValue())
+    }
+}
+
 actual suspend fun loadScanDownloadsAutomatically(): Boolean = withContext(Dispatchers.IO) {
     openLibraryDatabase().useLibrary { db ->
         db.getAppFlag(ScanDownloadsAutomaticallyFlag)?.toBooleanStrictOrNull() ?: true
@@ -611,6 +656,7 @@ private fun runCommand(vararg command: String): String? =
 
 private const val ActiveReadingFileIdFlag = "active_reading_file_id"
 private const val ThemeModeFlag = "theme_mode"
+private const val ReaderFontSettingsFlag = "reader_font_settings"
 private const val ScanDownloadsAutomaticallyFlag = "scan_downloads_automatically"
 private const val AppLocaleTagFlag = "app_locale_tag"
 private const val DownloadsWasScannedFlag = "downloads_was_scanned"