Snap windows to the desktop grid and to whole lines, font size picker (10 to 18), white text in settings dialogs, bump to 0.1.12

- After a move, windows snap to the Windows desktop icon grid; after a resize,
  the window height is trimmed so the scrollback ends on a whole line.
- The font size slider is replaced by square 10 to 18 buttons. Sizes saved by
  the old slider round to the nearest picker size.
- Settings and font dialogs always use white text, so a dark window text color
  no longer makes their labels invisible.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

build.gradle.kts

@@ -6,7 +6,7 @@ plugins {
 }
 
 group = "com.tpuahsiew.wirc"
-version = "0.1.8"
+version = "0.1.12"
 
 // No project-level repositories{} block here: settings.gradle.kts sets
 // dependencyResolutionManagement.repositoriesMode = FAIL_ON_PROJECT_REPOS and already
@@ -38,7 +38,7 @@ compose.desktop {
             appResourcesRootDir.set(project.file("installerResources"))
             targetFormats(TargetFormat.Msi, TargetFormat.Exe)
             packageName = "wIRC"
-            packageVersion = "0.1.8"
+            packageVersion = "0.1.12"
             windows {
                 menuGroup = "wIRC"
                 upgradeUuid = "8f14e45f-ceea-4a5e-9c3b-5b1f0e8c2b7a"

src/main/kotlin/Main.kt

@@ -51,6 +51,8 @@ fun main() = application {
     // Loaded once here (not per-window) so the alias map is truly global - every
     // ChannelWindow's command router reads from this same AliasRepository singleton.
     AliasRepository.init()
+    // Ask Windows for the desktop icon grid now, so the first window drag can already snap to it
+    ui.DesktopGrid.refreshAsync()
 
     val repo = remember { ServerRepository(appRoot) }
     val prefsRepo = remember { WindowPrefsRepository(appRoot) }
@@ -58,9 +60,9 @@ fun main() = application {
     var openBuffers by remember { mutableStateOf(setOf<BufferKey>()) }
     var mainUnread by remember { mutableStateOf(0) }
 
-    // Full shutdown: same steps /quit (bare, no args) already runs from a channel window -
-    // disconnect every server, then end the process. Shared here so the "Exit wIRC" button
-    // and every channel window's /quit reuse the exact same logic instead of duplicating it.
+    // Full shutdown for the "Exit wIRC" button: disconnect every server (which also writes
+    // all scrollback to disk), then end the process. A bare /quit in a channel window only
+    // disconnects that window's server - see ConnectionManager.disconnect.
     val shutdownApp: () -> Unit = {
         ConnectionManager.disconnectAll()
         exitApplication()
@@ -85,6 +87,9 @@ fun main() = application {
     // ("wirc-main__main"), same as every channel and PM window - see WindowPlacement.kt.
     val mainWindowState = rememberPersistentWindowState(prefsRepo, MAIN_BUFFER_KEY.storageId(), DpSize(800.dp, 700.dp))
     val mainDisplaySettings by prefsRepo.settingsFor(MAIN_BUFFER_KEY.storageId()).collectAsState()
+    // Snap to the desktop grid after a move, and to whole lines after a resize
+    val mainLineGap = ui.rememberLineGap()
+    ui.WindowSnapping(mainWindowState, mainLineGap, osFrame = true)
 
     // There's no persistent tray/notification surface on this build, so closing the main
     // server-list window quits the whole app (and every channel window with it) - the
@@ -98,6 +103,7 @@ fun main() = application {
         icon = painterResource("icon.png"),
         state = mainWindowState
     ) {
+        androidx.compose.runtime.CompositionLocalProvider(ui.LocalLineGap provides mainLineGap) {
         MaterialTheme(colorScheme = neutralDarkScheme) {
             Surface {
                 MainScreen(
@@ -108,11 +114,13 @@ fun main() = application {
                         openBuffers = openBuffers + BufferKey(serverId, channelName)
                     },
                     onExitApp = shutdownApp,
-                    onUnreadChange = { mainUnread = it }
+                    onUnreadChange = { mainUnread = it },
+                    onFontChange = { id -> prefsRepo.setFontId(MAIN_BUFFER_KEY.storageId(), id) }
                 )
             }
         }
         }
+    }
 
     openBuffers.forEach { bufferKey ->
         key(bufferKey) {
@@ -122,8 +130,10 @@ fun main() = application {
                 colorScheme = neutralDarkScheme,
                 onOpenBuffer = { newKey -> openBuffers = openBuffers + newKey },
                 onCloseSelf = { openBuffers = openBuffers - bufferKey },
-                onQuitApp = {
-                    exitApplication()
+                // openBuffers is read when /quit runs, so every window open at that moment
+                // gets its "Disconnected" line, even one that hasn't had a line yet.
+                onDisconnectServer = {
+                    ConnectionManager.disconnect(bufferKey.serverId, openBuffers)
                 }
             )
         }

src/main/kotlin/data/AliasRepository.kt

@@ -50,6 +50,12 @@ object AliasRepository {
         return aliases.size
     }
 
+    /** True if [command] (without the leading '/') is an alias - those run locally, no server needed. */
+    fun hasAlias(command: String): Boolean {
+        val key = command.lowercase()
+        return key != RESERVED_RELOAD && key in aliases
+    }
+
     /**
      * Returns true if [command] (without the leading '/') matched a known alias and its
      * action was run - callers should treat that as "handled, don't fall through to IRC

src/main/kotlin/data/WindowPrefsRepository.kt

@@ -10,10 +10,18 @@ import java.nio.file.Files
 import java.nio.file.StandardCopyOption
 import java.util.concurrent.ConcurrentHashMap
 
+// Font sizes offered in the settings dialog (whole sizes only, same range as QuickClaude)
+const val MIN_FONT_SIZE = 10
+const val MAX_FONT_SIZE = 18
+
+private fun pickerFontSize(size: Float): Float =
+    Math.round(size).coerceIn(MIN_FONT_SIZE, MAX_FONT_SIZE).toFloat()
+
 data class WindowDisplaySettings(
     val backgroundAlpha: Float = 0.85f,   // 0f = fully transparent, 1f = fully opaque
     val textColorMircIndex: Int = 0,   // index into the standard mIRC palette; 0 = white
     val fontSize: Float = 14f,
+    val fontId: String = "monospace",   // see ui/AppFonts.kt; unknown/missing ids fall back to monospace
     val showUserList: Boolean = true,
     val mentionHighlightColorArgb: Int = 0x40FFA500.toInt(),   // translucent orange
     val nickColorsEnabled: Boolean = true,
@@ -62,7 +70,9 @@ class WindowPrefsRepository(rootDir: File) {
 
     fun setTextColorMircIndex(bufferKeyId: String, index: Int) = update(bufferKeyId) { it.copy(textColorMircIndex = index) }
 
-    fun setFontSize(bufferKeyId: String, fontSize: Float) = update(bufferKeyId) { it.copy(fontSize = fontSize) }
+    fun setFontSize(bufferKeyId: String, fontSize: Float) = update(bufferKeyId) { it.copy(fontSize = pickerFontSize(fontSize)) }
+
+    fun setFontId(bufferKeyId: String, fontId: String) = update(bufferKeyId) { it.copy(fontId = fontId) }
 
     fun setShowUserList(bufferKeyId: String, show: Boolean) = update(bufferKeyId) { it.copy(showUserList = show) }
 
@@ -106,7 +116,9 @@ class WindowPrefsRepository(rootDir: File) {
                 stored[key] = WindowDisplaySettings(
                     backgroundAlpha = o.optDouble("backgroundAlpha", 0.85).toFloat(),
                     textColorMircIndex = o.optInt("textColorMircIndex", 0),
-                    fontSize = o.optDouble("fontSize", 14.0).toFloat(),
+                    // Sizes saved by the old slider (any value from 10 to 24) round to the nearest picker size
+                    fontSize = pickerFontSize(o.optDouble("fontSize", 14.0).toFloat()),
+                    fontId = o.optString("fontId", "monospace"),
                     showUserList = o.optBoolean("showUserList", true),
                     mentionHighlightColorArgb = o.optLong("mentionHighlightColorArgb", 0x40FFA500L).toInt(),
                     nickColorsEnabled = o.optBoolean("nickColorsEnabled", true),
@@ -138,6 +150,7 @@ class WindowPrefsRepository(rootDir: File) {
                     put("backgroundAlpha", settings.backgroundAlpha)
                     put("textColorMircIndex", settings.textColorMircIndex)
                     put("fontSize", settings.fontSize)
+                    put("fontId", settings.fontId)
                     put("showUserList", settings.showUserList)
                     put("mentionHighlightColorArgb", settings.mentionHighlightColorArgb)
                     put("nickColorsEnabled", settings.nickColorsEnabled)

src/main/kotlin/irc/ConnectionManager.kt

@@ -73,6 +73,17 @@ object ConnectionManager {
     private val _ownNicks = MutableStateFlow<Map<String, String>>(emptyMap())
     val ownNicksFlow: StateFlow<Map<String, String>> = _ownNicks
 
+    // Servers that have a live connection (or one that's connecting/auto-reconnecting after
+    // a network drop). A server leaves this set only through disconnect()/disconnectAll(),
+    // and it's what wIRC main's server cards show as Connected / Disconnected.
+    private val _connectedIds = MutableStateFlow<Set<String>>(emptySet())
+    val connectedIds: StateFlow<Set<String>> = _connectedIds
+
+    // serverId -> channels we were in when /quit disconnected that server, so the next
+    // connect() rejoins them (and the windows still open for them pick right back up)
+    // instead of only the configured auto-join list.
+    private val channelsToRejoin = ConcurrentHashMap<String, MutableSet<String>>()
+
     // A /whois we sent and haven't seen the end of yet. headerShown tracks whether its
     // "WHOIS <nick>" header line is already in wIRC main.
     private class PendingWhois(val nick: String, val sentAtMillis: Long, var headerShown: Boolean)
@@ -142,33 +153,100 @@ object ConnectionManager {
             existing.disconnect()
         }
         setOwnNick(config.id, config.nick)
-        val conn = IrcConnection(
+        // Channels from the connection a /quit ended, or from the one being replaced, so
+        // they're rejoined along with the auto-join list.
+        val rejoin = channelsToRejoin.remove(config.id).orEmpty() + existing?.trackedChannels().orEmpty()
+        lateinit var conn: IrcConnection
+        conn = IrcConnection(
             config = config,
             scope = scope,
-            onLine = { line -> enqueue { handleLine(config.id, line) } },
+            initialChannels = rejoin,
+            // Lines and status updates from a connection that's already been disconnected
+            // or replaced (its socket closing, a last line in flight) are dropped, so
+            // nothing shows up after the "Disconnected" line or overwrites that status.
+            onLine = { line -> if (connections[config.id] === conn) enqueue { handleLine(config.id, line) } },
             onStatus = { msg ->
+                if (connections[config.id] === conn) {
                     _statuses.update { it + (config.id to msg) }
                     // Connection progress and errors aren't tied to any channel - wIRC main.
                     enqueue { addMainLine(MessageKind.SYSTEM, null, "[${config.label}] $msg") }
                 }
+            }
         )
         connections[config.id] = conn
+        _connectedIds.update { it + config.id }
         conn.connect()
     }
 
+    /**
+     * Bare /quit: disconnects this one server and nothing else. Windows stay open and keep
+     * their scrollback; every buffer of this server (plus [openKeys], the open windows, in
+     * case one hasn't had a line yet) gets a "Disconnected" line, and so does wIRC main.
+     * There's no auto-reconnect afterward - the next connect() (the server card's Connect
+     * button) rejoins the channels we were in. History is written to disk right away, the
+     * same as disconnectAll() does on exit.
+     */
+    fun disconnect(serverId: String, openKeys: Collection<BufferKey> = emptyList()) {
+        val conn = connections.remove(serverId) ?: return
+        conn.disconnect()
+        channelsToRejoin[serverId] = conn.trackedChannels().toMutableSet()
+        _connectedIds.update { it - serverId }
+        _statuses.update { it + (serverId to "Disconnected") }
+        val label = conn.config.label
+        enqueue {
+            pendingWhois.remove(serverId)
+            val now = System.currentTimeMillis()
+            val keys = _buffers.value.keys.filter { it.serverId == serverId } +
+                openKeys.filter { it.serverId == serverId }
+            keys.distinct().forEach { key ->
+                addMessage(key, IrcMessage(now, MessageKind.SYSTEM, null, "Disconnected from $label"))
+            }
+            // We're no longer in any channel, so the user lists are stale - the NAMES reply
+            // on rejoin fills them again.
+            _buffers.update { map ->
+                map.mapValues { (key, buf) -> if (key.serverId == serverId) buf.copy(users = emptyList()) else buf }
+            }
+            addMainLine(MessageKind.SYSTEM, null, "[$label] Disconnected")
+            // Runs on the bufferOps queue after the lines above, so they're in the save.
+            flushAllSaves()
+        }
+    }
+
     fun disconnectAll() {
         connections.values.forEach { it.disconnect() }
         connections.clear()
+        _connectedIds.value = emptySet()
         flushAllSaves()
     }
 
+    fun isConnected(serverId: String): Boolean = connections.containsKey(serverId)
+
+    // /part from a channel window. While disconnected there's no PART to send, but the
+    // channel is dropped from the rejoin list so reconnecting doesn't rejoin it.
+    fun partChannel(serverId: String, channel: String, reason: String) {
+        val conn = connectionFor(serverId)
+        if (conn != null) conn.partChannel(channel, reason)
+        else channelsToRejoin[serverId]?.remove(channel)
+    }
+
+    // /join from a channel window. A plain channel list is tracked (see
+    // IrcConnection.joinChannel) so a reconnect rejoins it; one with a key is sent as-is,
+    // since rejoining it later without the key wouldn't work anyway.
+    fun joinChannels(serverId: String, args: String) {
+        val conn = connectionFor(serverId) ?: return
+        if (args.contains(' ')) conn.send("JOIN $args")
+        else args.split(',').filter { it.isNotBlank() }.forEach { conn.joinChannel(it) }
+    }
+
     fun connectionFor(serverId: String): IrcConnection? = connections[serverId]
 
     // IRC servers don't echo PRIVMSG back to its sender, so a sent message has to be
     // added to our own buffer locally - otherwise it would never show up in the window
     // that sent it.
     fun sendChannelMessage(serverId: String, target: String, text: String) {
-        connectionFor(serverId)?.sendMessage(target, text)
+        // No local echo while disconnected - the line was never sent.
+        val conn = connectionFor(serverId) ?: return
+        conn.sendMessage(target, text)
         val myNick = ownNicks[serverId] ?: return
         val msg = IrcMessage(System.currentTimeMillis(), MessageKind.CHAT, myNick, text)
         enqueue { addOutgoing(serverId, target, msg, "-> *$target* $text") }
@@ -178,7 +256,8 @@ object ConnectionManager {
     // CTCP ACTION wrapper, while the buffer should just hold the plain action text
     // (ChannelScreen renders MessageKind.ACTION with its own "* nick ..." prefix).
     fun sendChannelAction(serverId: String, target: String, action: String) {
-        connectionFor(serverId)?.sendMessage(target, "\u0001ACTION $action\u0001")
+        val conn = connectionFor(serverId) ?: return
+        conn.sendMessage(target, "\u0001ACTION $action\u0001")
         val myNick = ownNicks[serverId] ?: return
         val msg = IrcMessage(System.currentTimeMillis(), MessageKind.ACTION, myNick, action)
         enqueue { addOutgoing(serverId, target, msg, "-> *$target* * $myNick $action") }

src/main/kotlin/irc/IrcConnection.kt

@@ -50,6 +50,9 @@ private fun translateOnConnectCommand(cmd: String): String {
 class IrcConnection(
     val config: ServerConfig,
     private val scope: CoroutineScope,
+    // Channels to rejoin on top of config.autoJoinChannels - the ones a previous connection
+    // to this server was in (see ConnectionManager.connect).
+    initialChannels: Collection<String> = emptyList(),
     private val onLine: (ParsedLine) -> Unit,
     private val onStatus: (String) -> Unit
 ) {
@@ -60,13 +63,17 @@ class IrcConnection(
     @Volatile private var socket: Socket? = null
     @Volatile private var writer: PrintWriter? = null
     private var readJob: Job? = null
-    private var wantConnected = false
+    // @Volatile: disconnect() clears it from the UI thread while the read loop checks it on
+    // an IO thread - it's what stops the loop from auto-reconnecting after a /quit.
+    @Volatile private var wantConnected = false
     private var backoffMillis = 2000L
 
     // Every channel we're currently in, whether from config.autoJoinChannels or joined
     // manually mid-session - so a reconnect rejoins everything, not just the original
     // auto-join list.
-    private val joinedChannels = java.util.concurrent.CopyOnWriteArraySet<String>()
+    private val joinedChannels = java.util.concurrent.CopyOnWriteArraySet<String>(initialChannels)
+
+    fun trackedChannels(): Set<String> = joinedChannels.toSet()
 
     // Guards runPostRegistration() against running twice for the same connection cycle
     // (376 and 422 are mutually exclusive per RFC, but this is cheap insurance) - reset
@@ -121,6 +128,9 @@ class IrcConnection(
                         Socket(config.host, config.port)
                     }
                     socket = sock
+                    // disconnect() can't interrupt a socket that's still being opened, so
+                    // check here before registering on a connection nobody wants anymore.
+                    ensureActive()
                     val out = PrintWriter(OutputStreamWriter(sock.getOutputStream(), Charsets.UTF_8), true)
                     writer = out
 
@@ -161,6 +171,9 @@ class IrcConnection(
                         handleRawLine(line)
                     }
                 } catch (e: Exception) {
+                    // After disconnect() the read fails because we closed the socket
+                    // ourselves - that's not an error worth reporting.
+                    if (!wantConnected) break
                     onStatus("Connection error: ${e.message}")
                     ircDebug(config.id, "connection dropped: ${e.message} - tracked channels at drop time: $joinedChannels")
                 } finally {
@@ -277,6 +290,9 @@ class IrcConnection(
             try { writer?.println("QUIT :leaving") } catch (_: Exception) {}
             readJob?.cancel()
             closeSocketQuietly()
+            // Ends the outbox consumer - this connection is never reused (a reconnect
+            // makes a new IrcConnection), so it would otherwise idle forever.
+            outbox.close()
         }
     }
 

src/main/kotlin/ui/AppFonts.kt

@@ -0,0 +1,111 @@
+package ui
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.platform.Font
+import java.io.File
+
+/**
+ * Fonts offered in each window's settings. Stored in window_prefs.json by [id], so the ids
+ * must never change once shipped.
+ *
+ * Two kinds:
+ *  - Windows fonts (Segoe UI, Tahoma, Tw Cen MT) are Microsoft-licensed, so they are NOT
+ *    bundled. They are loaded straight out of the Windows font folders at runtime and only
+ *    listed when the file is actually there (Tw Cen MT only exists if Office is installed).
+ *  - Rounded fonts (Nunito, Quicksand, Varela Round) are SIL OFL licensed and bundled in
+ *    src/main/resources/fonts with their license files.
+ *
+ * Anything missing or failing to load falls back to Monospace, so a font uninstalled after
+ * being picked can never crash a window.
+ */
+data class FontOption(val id: String, val label: String, val family: FontFamily)
+
+object AppFonts {
+    const val DEFAULT_ID = "monospace"
+
+    private val fontDirs: List<File> = buildList {
+        add(File(System.getenv("WINDIR") ?: "C:\\Windows", "Fonts"))
+        System.getenv("LOCALAPPDATA")?.let { add(File(it, "Microsoft\\Windows\\Fonts")) }
+    }
+
+    /** Case-insensitive lookup across the system and per-user font folders. */
+    private fun findSystemFont(name: String): File? {
+        for (dir in fontDirs) {
+            val direct = File(dir, name)
+            if (direct.isFile) return direct
+            dir.listFiles()?.firstOrNull { it.name.equals(name, ignoreCase = true) }?.let { return it }
+        }
+        return null
+    }
+
+    private fun systemFamily(regular: String, bold: String?): FontFamily? {
+        val reg = findSystemFont(regular) ?: return null
+        return try {
+            val fonts = mutableListOf(Font(reg, FontWeight.Normal))
+            bold?.let { findSystemFont(it) }?.let { fonts.add(Font(it, FontWeight.Bold)) }
+            FontFamily(fonts)
+        } catch (e: Exception) {
+            null
+        }
+    }
+
+    private fun bundledFamily(regular: String, bold: String?): FontFamily? = try {
+        val fonts = mutableListOf(Font("fonts/$regular", FontWeight.Normal))
+        bold?.let { fonts.add(Font("fonts/$it", FontWeight.Bold)) }
+        FontFamily(fonts)
+    } catch (e: Exception) {
+        null
+    }
+
+    /** Built once at startup; the font folders don't change while wIRC is running. */
+    val options: List<FontOption> by lazy {
+        buildList {
+            add(FontOption(DEFAULT_ID, "Monospace", FontFamily.Monospace))
+            systemFamily("segoeui.ttf", "segoeuib.ttf")?.let { add(FontOption("segoe-ui", "Segoe UI", it)) }
+            systemFamily("tahoma.ttf", "tahomabd.ttf")?.let { add(FontOption("tahoma", "Tahoma", it)) }
+            systemFamily("TCM_____.TTF", "TCB_____.TTF")?.let { add(FontOption("tw-cen-mt", "Tw Cen MT", it)) }
+            bundledFamily("Nunito-Regular.ttf", "Nunito-Bold.ttf")?.let { add(FontOption("nunito", "Nunito (rounded)", it)) }
+            bundledFamily("Quicksand-Regular.ttf", "Quicksand-Bold.ttf")?.let { add(FontOption("quicksand", "Quicksand (rounded)", it)) }
+            bundledFamily("VarelaRound-Regular.ttf", null)?.let { add(FontOption("varela-round", "Varela Round (rounded)", it)) }
+        }
+    }
+
+    fun familyFor(id: String): FontFamily =
+        options.firstOrNull { it.id == id }?.family ?: FontFamily.Monospace
+}
+
+/**
+ * The font list used in both the channel-window settings and wIRC main's Font dialog. Each
+ * name is drawn in its own font as a live preview; plain square-cornered rows, no dropdown.
+ */
+@Composable
+fun FontPickerList(selectedId: String, textColor: Color, onPick: (String) -> Unit) {
+    val effectiveId = if (AppFonts.options.any { it.id == selectedId }) selectedId else AppFonts.DEFAULT_ID
+    Column {
+        AppFonts.options.forEach { option ->
+            Text(
+                text = option.label,
+                color = textColor,
+                fontFamily = option.family,
+                fontSize = 15.sp,
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .background(if (option.id == effectiveId) Color.White.copy(alpha = 0.18f) else Color.Transparent)
+                    .clickable { onPick(option.id) }
+                    .padding(horizontal = 6.dp, vertical = 4.dp)
+            )
+        }
+    }
+}

src/main/kotlin/ui/ChannelScreen.kt

@@ -83,6 +83,8 @@ import androidx.compose.ui.window.rememberDialogState
 import data.ChannelBuffer
 import data.ChannelUser
 import data.IrcMessage
+import data.MAX_FONT_SIZE
+import data.MIN_FONT_SIZE
 import data.MessageKind
 import data.WindowDisplaySettings
 import irc.extractImageUrls
@@ -102,6 +104,7 @@ import java.net.URL
 import java.text.SimpleDateFormat
 import java.util.*
 import kotlin.math.floor
+import kotlin.math.roundToInt
 
 // Title-bar button fade (nicklist / settings / minimize / close). The buttons sit at
 // TITLE_BAR_BUTTON_REST_ALPHA until hovered, then animate to TITLE_BAR_BUTTON_HOVER_ALPHA
@@ -195,6 +198,7 @@ fun WindowScope.ChannelScreen(
     onAlphaChange: (Float) -> Unit,
     onTextColorChange: (Int) -> Unit,
     onFontSizeChange: (Float) -> Unit,
+    onFontChange: (String) -> Unit,
     onShowUserListChange: (Boolean) -> Unit,
     onNickColorsToggle: (Boolean) -> Unit,
     onMentionHighlightColorChange: (Int) -> Unit,
@@ -370,7 +374,7 @@ fun WindowScope.ChannelScreen(
                     horizontalArrangement = Arrangement.SpaceBetween,
                     verticalAlignment = Alignment.CenterVertically
                 ) {
-                    Text(channelName, color = textColor, fontFamily = FontFamily.Monospace, style = MaterialTheme.typography.labelSmall)
+                    Text(channelName, color = textColor, fontFamily = AppFonts.familyFor(displaySettings.fontId), style = MaterialTheme.typography.labelSmall)
                     Row {
                         FadingTitleBarButton(onClick = { onShowUserListChange(!displaySettings.showUserList) }) {
                             Icon(Icons.Default.Person, contentDescription = "Toggle user list", tint = textColor, modifier = Modifier.size(16.dp))
@@ -416,10 +420,13 @@ fun WindowScope.ChannelScreen(
                         Surface {
                             WindowSettingsPanel(
                                 displaySettings = displaySettings,
-                                textColor = textColor,
+                                // Always white: the dialog is black, so the window's own text
+                                // color (black, say) would make every label invisible here
+                                textColor = Color.White,
                                 onAlphaChange = onAlphaChange,
                                 onTextColorChange = onTextColorChange,
                                 onFontSizeChange = onFontSizeChange,
+                                onFontChange = onFontChange,
                                 onNickColorsToggle = onNickColorsToggle,
                                 onMentionHighlightColorChange = onMentionHighlightColorChange,
                                 onShowImagePreviewsChange = onShowImagePreviewsChange
@@ -453,7 +460,7 @@ fun WindowScope.ChannelScreen(
                             Text(
                                 text = (if (user.isOp) "@" else if (user.isVoice) "+" else "") + user.nick,
                                 color = textColor,
-                                fontFamily = FontFamily.Monospace,
+                                fontFamily = AppFonts.familyFor(displaySettings.fontId),
                                 fontSize = displaySettings.fontSize.sp,
                                 modifier = Modifier
                                     .fillMaxWidth()
@@ -491,7 +498,7 @@ fun WindowScope.ChannelScreen(
                     onValueChange = { input = it },
                     singleLine = true,
                     textStyle = androidx.compose.ui.text.TextStyle(
-                        fontFamily = FontFamily.Monospace,
+                        fontFamily = AppFonts.familyFor(displaySettings.fontId),
                         color = textColor,
                         fontSize = displaySettings.fontSize.sp
                     ),
@@ -840,11 +847,11 @@ fun MessageScrollback(
         // then converts that now-stale pixel value using the NEW density, so the
         // two silently disagreed until the window (and this remember scope) was
         // recreated by closing and reopening it.
-        val lineHeightPx = remember(displaySettings.fontSize, density) {
+        val lineHeightPx = remember(displaySettings.fontSize, displaySettings.fontId, density) {
             textMeasurer.measure(
                 text = "Mg",
                 style = androidx.compose.ui.text.TextStyle(
-                    fontFamily = FontFamily.Monospace,
+                    fontFamily = AppFonts.familyFor(displaySettings.fontId),
                     fontSize = displaySettings.fontSize.sp
                 )
             ).size.height
@@ -857,10 +864,14 @@ fun MessageScrollback(
         // real cause was a race between the scroll effect and the LazyColumn's
         // own layout catching up to new items - see the scroll effects below.
         val snappedHeight = if (lineHeightDp > 0.dp) {
-            lineHeightDp * floor(maxHeight / lineHeightDp).toInt()
+            minOf(maxHeight, lineHeightDp * wholeLines(maxHeight, lineHeightDp))
         } else {
             maxHeight
         }
+        // Tells the window how much space is left under the last whole line, so a resize can
+        // trim the window itself to fit (see WindowSnapping.kt)
+        val lineGap = LocalLineGap.current
+        SideEffect { lineGap?.gap = maxHeight - snappedHeight }
 
         // NOTE: this used to also re-snap the scroll *offset* to the first
         // visible item on every resize/font-size change, to fix a partial line
@@ -875,7 +886,7 @@ fun MessageScrollback(
         // second independent one.
 
     val textStyle = androidx.compose.ui.text.TextStyle(
-        fontFamily = FontFamily.Monospace,
+        fontFamily = AppFonts.familyFor(displaySettings.fontId),
         fontSize = displaySettings.fontSize.sp
     )
     val selection = selectionState.selection
@@ -1029,7 +1040,10 @@ fun MessageScrollback(
         ) { msg ->
             val ts = timeFormat.format(Date(msg.timestampMillis))
             val bodyAnnotated = parseMircToAnnotatedString(msg.rawText, textColor)
-            val mentioned = isMention(msg.rawText)
+            // Only real messages get the mention tint. Join/part/quit/nick/mode lines
+            // always contain your nick when they're about you ("you joined #chan"),
+            // which used to light up every one of your own joins.
+            val mentioned = msg.kind in MENTION_KINDS && isMention(msg.rawText)
             val nickColor = if (displaySettings.nickColorsEnabled) colorForNick(msg.sender ?: "") else textColor
             val mutedColor = textColor.copy(alpha = 0.7f)
             val prefix = rowPrefix(msg, ts, mutedColor, nickColor)
@@ -1397,6 +1411,8 @@ private fun MentionColorPickerDialog(currentArgb: Int, onDismiss: () -> Unit, on
     )
 }
 
+private val MENTION_KINDS = setOf(MessageKind.CHAT, MessageKind.ACTION, MessageKind.NOTICE)
+
 @Composable
 private fun WindowSettingsPanel(
     displaySettings: WindowDisplaySettings,
@@ -1404,6 +1420,7 @@ private fun WindowSettingsPanel(
     onAlphaChange: (Float) -> Unit,
     onTextColorChange: (Int) -> Unit,
     onFontSizeChange: (Float) -> Unit,
+    onFontChange: (String) -> Unit,
     onNickColorsToggle: (Boolean) -> Unit,
     onMentionHighlightColorChange: (Int) -> Unit,
     onShowImagePreviewsChange: (Boolean) -> Unit
@@ -1433,13 +1450,27 @@ private fun WindowSettingsPanel(
             colors = sliderColors
         )
         Spacer(Modifier.height(4.dp))
-        Text("Font size", color = textColor, style = MaterialTheme.typography.bodySmall)
-        Slider(
-            value = displaySettings.fontSize,
-            onValueChange = onFontSizeChange,
-            valueRange = 10f..24f,
-            colors = sliderColors
-        )
+        Text("Font size:", color = textColor, style = MaterialTheme.typography.bodySmall)
+        // Fixed sizes 10 to 18 (same as QuickClaude's Font size menu), square boxes in a row
+        val currentSize = displaySettings.fontSize.roundToInt()
+        Row(horizontalArrangement = Arrangement.spacedBy(4.dp)) {
+            for (size in MIN_FONT_SIZE..MAX_FONT_SIZE) {
+                val selected = size == currentSize
+                Box(
+                    modifier = Modifier
+                        .size(28.dp)
+                        .background(if (selected) Color.White.copy(alpha = 0.25f) else Color.Transparent)
+                        .border(1.dp, if (selected) Color.White else Color.White.copy(alpha = 0.35f))
+                        .clickableNoRipple { onFontSizeChange(size.toFloat()) },
+                    contentAlignment = Alignment.Center
+                ) {
+                    Text(size.toString(), color = textColor, fontSize = 12.sp)
+                }
+            }
+        }
+        Spacer(Modifier.height(4.dp))
+        Text("Font:", color = textColor, style = MaterialTheme.typography.bodySmall)
+        FontPickerList(displaySettings.fontId, textColor, onFontChange)
         Spacer(Modifier.height(4.dp))
         Text("Text color:", color = textColor, style = MaterialTheme.typography.bodySmall)
         FlowSwatchGrid(

src/main/kotlin/ui/ChannelWindow.kt

@@ -3,6 +3,7 @@ package ui
 import androidx.compose.material3.ColorScheme
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.derivedStateOf
@@ -20,9 +21,20 @@ import data.WindowPrefsRepository
 import data.isChannelName
 import data.storageId
 import irc.ConnectionManager
+import irc.IrcConnection
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 
+private const val NOT_CONNECTED_TEXT = "Not connected - use Connect in wIRC main to reconnect"
+
+// Runs [action] on this server's connection, or shows the not-connected line in this
+// window when there isn't one (e.g. the user-list kick/ban/op menu after a /quit).
+private fun withConnection(serverId: String, windowName: String, action: (IrcConnection) -> Unit) {
+    val conn = ConnectionManager.connectionFor(serverId)
+    if (conn != null) action(conn)
+    else ConnectionManager.addSystemMessage(serverId, windowName, NOT_CONNECTED_TEXT)
+}
+
 /**
  * One of these is composed per open buffer key (see Main.kt) - each is a real, independent
  * top-level OS window, same intent as ChannelWindowActivity.kt's per-channel Activity on
@@ -36,7 +48,7 @@ fun ChannelWindow(
     colorScheme: ColorScheme,
     onOpenBuffer: (BufferKey) -> Unit,
     onCloseSelf: () -> Unit,
-    onQuitApp: () -> Unit
+    onDisconnectServer: () -> Unit
 ) {
     val serverId = bufferKey.serverId
     val channelName = bufferKey.name
@@ -63,6 +75,9 @@ fun ChannelWindow(
     // Restored from window_prefs.json (or cascaded if there's no usable saved position)
     // and saved back on move/resize/close - see WindowPlacement.kt.
     val windowState = rememberPersistentWindowState(prefsRepo, bufferKey.storageId(), DpSize(800.dp, 600.dp))
+    // Snap to the desktop grid after a move, and to whole lines after a resize
+    val lineGap = rememberLineGap()
+    WindowSnapping(windowState, lineGap)
 
     // undecorated + transparent trade the native OS title bar for real per-pixel window
     // transparency (Windows only honors transparency on undecorated windows) - ChannelScreen
@@ -78,6 +93,7 @@ fun ChannelWindow(
         transparent = true,
         resizable = true
     ) {
+        CompositionLocalProvider(LocalLineGap provides lineGap) {
         MaterialTheme(colorScheme = colorScheme) {
                 ChannelScreen(
                     windowState = windowState,
@@ -87,7 +103,19 @@ fun ChannelWindow(
                     displaySettings = displaySettings,
                     colorScheme = colorScheme,
                     ownNick = ownNick,
-                    onSend = { text ->
+                    onSend = onSend@{ text ->
+                        // Everything except /reload, aliases and /part (which only closes
+                        // the window) needs the server - while disconnected it gets this
+                        // line in this window instead of going nowhere.
+                        val needsServer = if (text.startsWith("/")) {
+                            val command = text.substring(1).substringBefore(' ').uppercase()
+                            command != "RELOAD" && command !in setOf("PART", "EXIT", "CLOSE") &&
+                                !AliasRepository.hasAlias(command)
+                        } else true
+                        if (needsServer && !ConnectionManager.isConnected(serverId)) {
+                            ConnectionManager.addSystemMessage(serverId, channelName, NOT_CONNECTED_TEXT)
+                            return@onSend
+                        }
                         if (text.startsWith("/")) {
                             val withoutSlash = text.substring(1)
                             val spaceIdx = withoutSlash.indexOf(' ')
@@ -112,19 +140,20 @@ fun ChannelWindow(
                                     "NICK" -> ConnectionManager.sendRaw(serverId, "NICK $args")
                                     "PART", "EXIT", "CLOSE" -> {
                                         val target = args.ifBlank { channelName }
-                                        ConnectionManager.connectionFor(serverId)?.partChannel(target, "leaving")
+                                        ConnectionManager.partChannel(serverId, target, "leaving")
                                         if (args.isBlank() || target == channelName) onCloseSelf()
                                     }
                                     "QUIT" -> {
                                         if (rawArgs.isBlank()) {
-                                            ConnectionManager.disconnectAll()
-                                            onQuitApp()
+                                            // Disconnects this window's server only - every
+                                            // window stays open; see ConnectionManager.disconnect.
+                                            onDisconnectServer()
                                         } else {
                                             ConnectionManager.sendChannelMessage(serverId, channelName, rawArgs)
                                         }
                                     }
                                     "JOIN" -> {
-                                        ConnectionManager.sendRaw(serverId, "JOIN $args")
+                                        ConnectionManager.joinChannels(serverId, args)
                                         onOpenBuffer(BufferKey(serverId, args))
                                     }
                                     // All whois output goes to wIRC main, not this window.
@@ -144,10 +173,10 @@ fun ChannelWindow(
                             ConnectionManager.sendChannelMessage(serverId, channelName, text)
                         }
                     },
-                    onKick = { nick -> ConnectionManager.connectionFor(serverId)?.kick(channelName, nick) },
-                    onBan = { nick -> ConnectionManager.connectionFor(serverId)?.ban(channelName, "$nick!*@*") },
-                    onOp = { nick -> ConnectionManager.connectionFor(serverId)?.setMode(channelName, "+o", nick) },
-                    onDeop = { nick -> ConnectionManager.connectionFor(serverId)?.setMode(channelName, "-o", nick) },
+                    onKick = { nick -> withConnection(serverId, channelName) { it.kick(channelName, nick) } },
+                    onBan = { nick -> withConnection(serverId, channelName) { it.ban(channelName, "$nick!*@*") } },
+                    onOp = { nick -> withConnection(serverId, channelName) { it.setMode(channelName, "+o", nick) } },
+                    onDeop = { nick -> withConnection(serverId, channelName) { it.setMode(channelName, "-o", nick) } },
                     onAlphaChange = { alpha ->
                         scope.launch(Dispatchers.IO) { prefsRepo.setAlpha(bufferKey.storageId(), alpha) }
                     },
@@ -157,6 +186,9 @@ fun ChannelWindow(
                     onFontSizeChange = { size ->
                         scope.launch(Dispatchers.IO) { prefsRepo.setFontSize(bufferKey.storageId(), size) }
                     },
+                    onFontChange = { id ->
+                        scope.launch(Dispatchers.IO) { prefsRepo.setFontId(bufferKey.storageId(), id) }
+                    },
                     onShowUserListChange = { show ->
                         scope.launch(Dispatchers.IO) { prefsRepo.setShowUserList(bufferKey.storageId(), show) }
                     },
@@ -173,3 +205,4 @@ fun ChannelWindow(
         }
         }
     }
+}

src/main/kotlin/ui/MainScreen.kt

@@ -43,12 +43,16 @@ fun MainScreen(
     displaySettings: WindowDisplaySettings,
     onOpenChannel: (serverId: String, channelName: String) -> Unit,
     onExitApp: () -> Unit,
-    onUnreadChange: (Int) -> Unit
+    onUnreadChange: (Int) -> Unit,
+    onFontChange: (String) -> Unit
 ) {
+    var showFontDialog by remember { mutableStateOf(false) }
     var servers by remember { mutableStateOf(repo.loadAll()) }
     var showAddDialog by remember { mutableStateOf(false) }
     var editingServer by remember { mutableStateOf<ServerConfig?>(null) }
-    var connectedIds by remember { mutableStateOf(setOf<String>()) }
+    // From ConnectionManager rather than local state, so a /quit typed in a channel window
+    // flips that server's card back to Disconnected with its Connect button.
+    val connectedIds by ConnectionManager.connectedIds.collectAsState()
     var channelInputs by remember { mutableStateOf(mapOf<String, String>()) }
     var openedChannels by remember { mutableStateOf(mapOf<String, List<String>>()) }
     val coroutineScope = rememberCoroutineScope()
@@ -85,9 +89,14 @@ fun MainScreen(
                     Text("+ Add Server")
                 }
                 Spacer(Modifier.width(8.dp))
-                // Same end result as typing "/quit" alone in a channel window - disconnects
-                // every server and terminates the process - just reachable without needing
-                // a channel window open first.
+                // Font for the server messages box (channel windows pick theirs in their own
+                // settings).
+                TextButton(onClick = { showFontDialog = true }) {
+                    Text("Font")
+                }
+                Spacer(Modifier.width(8.dp))
+                // Disconnects every server and terminates the process. (A bare "/quit" in a
+                // channel window only disconnects that window's server.)
                 TextButton(onClick = onExitApp) {
                     Text("Exit wIRC")
                 }
@@ -108,8 +117,9 @@ fun MainScreen(
                     openedChannels = openedChannels[server.id] ?: emptyList(),
                     onChannelInputChange = { text -> channelInputs = channelInputs + (server.id to text) },
                     onConnect = {
+                        // Also rejoins the channels this server was in before a /quit - their
+                        // windows are still open, and opening one that already is is a no-op.
                         ConnectionManager.connect(server)
-                        connectedIds = connectedIds + server.id
                         if (server.autoJoinChannels.isNotEmpty()) {
                             // Auto-join sends JOIN correctly on connect (see IrcConnection),
                             // but nothing else opens a window for it like the manual
@@ -185,6 +195,25 @@ fun MainScreen(
         )
     }
 
+    if (showFontDialog) {
+        DialogWindow(
+            onCloseRequest = { showFontDialog = false },
+            title = "wIRC main font",
+            state = rememberDialogState(size = DpSize(300.dp, 360.dp)),
+            resizable = true
+        ) {
+            MaterialTheme(colorScheme = colorScheme) {
+                Surface {
+                    Column(modifier = Modifier.fillMaxSize().padding(8.dp).verticalScroll(rememberScrollState())) {
+                        Text("Server messages font:", color = Color.White, style = MaterialTheme.typography.bodySmall)
+                        Spacer(Modifier.height(4.dp))
+                        FontPickerList(displaySettings.fontId, Color.White, onFontChange)
+                    }
+                }
+            }
+        }
+    }
+
     if (showAddDialog) {
         ServerEditDialog(
             existing = editingServer,
@@ -243,6 +272,8 @@ private fun ServerCard(
             Spacer(Modifier.height(8.dp))
 
             if (!isConnected) {
+                Text("Disconnected", style = MaterialTheme.typography.bodySmall)
+                Spacer(Modifier.height(4.dp))
                 Button(onClick = onConnect) { Text("Connect") }
             } else {
                 Text("Connected", style = MaterialTheme.typography.bodySmall)

src/main/kotlin/ui/WindowSnapping.kt

@@ -0,0 +1,204 @@
+package ui
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.snapshotFlow
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.staticCompositionLocalOf
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.DpSize
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.isSpecified
+import androidx.compose.ui.window.WindowPlacement
+import androidx.compose.ui.window.WindowPosition
+import androidx.compose.ui.window.WindowState
+import java.awt.AWTEvent
+import java.awt.GraphicsEnvironment
+import java.awt.Rectangle
+import java.awt.Toolkit
+import java.awt.event.AWTEventListener
+import java.awt.event.MouseEvent
+import java.util.Base64
+import java.util.concurrent.TimeUnit
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.collectLatest
+import kotlin.math.floor
+import kotlin.math.roundToInt
+
+/**
+ * Space left over under the last whole line of a window's scrollback, reported by
+ * MessageScrollback (which already sizes the scrollback itself to whole lines). When a
+ * resize ends, the window is trimmed by this much so the window itself fits whole lines too.
+ */
+class LineGap {
+    @Volatile var gap: Dp = 0.dp
+}
+
+val LocalLineGap = staticCompositionLocalOf<LineGap?> { null }
+
+@Composable
+fun rememberLineGap(): LineGap = remember { LineGap() }
+
+/**
+ * After the mouse is let go at the end of a drag or resize:
+ *  - a move snaps the window's top-left corner to the desktop icon grid
+ *  - a resize trims the window to whole lines of scrollback text (keeping whichever edge
+ *    didn't move in place)
+ * Channel windows are undecorated, so their moves and resizes happen inside the app (the
+ * title-bar drag area and Compose's own edge resizer) and the mouse release reaches wIRC.
+ * wIRC main has a normal Windows frame, whose drags Windows handles itself without telling
+ * the app when the button comes up, so for it ([osFrame] = true) the snap happens once the
+ * window has sat still for a moment instead.
+ */
+@Composable
+fun WindowSnapping(state: WindowState, lineGap: LineGap, osFrame: Boolean = false) {
+    if (osFrame) {
+        LaunchedEffect(state, lineGap) {
+            var settledPos: WindowPosition = state.position
+            var settledSize: DpSize = state.size
+            snapshotFlow { state.position to state.size }.collectLatest {
+                delay(OS_FRAME_SETTLE_MS)
+                afterMoveOrResize(state, lineGap, settledPos, settledSize)
+                settledPos = state.position
+                settledSize = state.size
+            }
+        }
+        return
+    }
+    DisposableEffect(state, lineGap) {
+        var startPos: WindowPosition? = null
+        var startSize: DpSize? = null
+        val listener = AWTEventListener { event ->
+            val e = event as? MouseEvent ?: return@AWTEventListener
+            if (e.button != MouseEvent.BUTTON1) return@AWTEventListener
+            when (e.id) {
+                MouseEvent.MOUSE_PRESSED -> {
+                    startPos = state.position
+                    startSize = state.size
+                }
+                MouseEvent.MOUSE_RELEASED -> {
+                    val p0 = startPos
+                    val s0 = startSize
+                    startPos = null
+                    startSize = null
+                    if (p0 != null && s0 != null) afterMoveOrResize(state, lineGap, p0, s0)
+                }
+            }
+        }
+        Toolkit.getDefaultToolkit().addAWTEventListener(listener, AWTEvent.MOUSE_EVENT_MASK)
+        onDispose { Toolkit.getDefaultToolkit().removeAWTEventListener(listener) }
+    }
+}
+
+// How long wIRC main has to sit still after a move/resize before it snaps
+private const val OS_FRAME_SETTLE_MS = 400L
+
+private fun afterMoveOrResize(state: WindowState, lineGap: LineGap, p0: WindowPosition, s0: DpSize) {
+    if (state.isMinimized || state.placement != WindowPlacement.Floating) return
+    val pos = state.position as? WindowPosition.Absolute ?: return
+    val size = state.size
+    if (!size.isSpecified || !s0.isSpecified) return
+    val start = p0 as? WindowPosition.Absolute
+
+    val resized = (size.width - s0.width).value.let { it > 0.5f || it < -0.5f } ||
+        (size.height - s0.height).value.let { it > 0.5f || it < -0.5f }
+
+    if (resized) {
+        val gap = lineGap.gap
+        if (gap > 0.5.dp && size.height - gap >= 120.dp) {
+            // Dragged the top edge (top moved, bottom stayed): keep the bottom where it is
+            val fromTop = start != null && (pos.y - start.y).value.let { it > 0.5f || it < -0.5f } &&
+                ((pos.y + size.height) - (start.y + s0.height)).value.let { it < 0.5f && it > -0.5f }
+            state.size = DpSize(size.width, size.height - gap)
+            if (fromTop) state.position = WindowPosition.Absolute(pos.x, pos.y + gap)
+        }
+        return
+    }
+
+    if (start == null || (start.x == pos.x && start.y == pos.y)) return
+    val (sx, sy) = DesktopGrid.spacing() ?: return
+    val area = workAreaAt(pos.x.value, pos.y.value)
+    val x = area.x + ((pos.x.value - area.x) / sx).roundToInt() * sx
+    val y = area.y + ((pos.y.value - area.y) / sy).roundToInt() * sy
+    if (x != pos.x.value || y != pos.y.value) state.position = WindowPosition.Absolute(x.dp, y.dp)
+}
+
+// The usable area (taskbar excluded) of the screen the window's corner is on, in the same
+// logical units as WindowState positions.
+private fun workAreaAt(x: Float, y: Float): Rectangle = try {
+    val ge = GraphicsEnvironment.getLocalGraphicsEnvironment()
+    val config = ge.screenDevices.map { it.defaultConfiguration }
+        .firstOrNull { it.bounds.contains(x.toInt(), y.toInt()) } ?: ge.defaultScreenDevice.defaultConfiguration
+    val b = config.bounds
+    val i = Toolkit.getDefaultToolkit().getScreenInsets(config)
+    Rectangle(b.x + i.left, b.y + i.top, b.width - i.left - i.right, b.height - i.top - i.bottom)
+} catch (e: Exception) {
+    Rectangle(0, 0, 1280, 720)
+}
+
+/**
+ * The desktop icon grid's spacing, read from the desktop's own icon view (so it follows the
+ * icon size and spacing Windows is really using), falling back to the system icon spacing.
+ * Java can't call Windows directly without extra libraries, so a hidden PowerShell asks once
+ * at startup, in the background; snapping just skips until the answer is in.
+ */
+object DesktopGrid {
+    @Volatile private var cached: Pair<Float, Float>? = null
+    @Volatile private var started = false
+
+    fun spacing(): Pair<Float, Float>? {
+        if (!started) refreshAsync()
+        return cached
+    }
+
+    @Synchronized
+    fun refreshAsync() {
+        if (started) return
+        started = true
+        Thread {
+            try {
+                val script = """
+                    Add-Type -TypeDefinition @'
+                    using System; using System.Runtime.InteropServices;
+                    public static class WircGrid {
+                      [DllImport("user32.dll", CharSet=CharSet.Unicode)] static extern IntPtr FindWindow(string c, string n);
+                      [DllImport("user32.dll", CharSet=CharSet.Unicode)] static extern IntPtr FindWindowEx(IntPtr p, IntPtr a, string c, string n);
+                      [DllImport("user32.dll")] static extern IntPtr SendMessage(IntPtr h, int m, IntPtr w, IntPtr l);
+                      [DllImport("user32.dll")] static extern bool SystemParametersInfo(uint a, uint p, out int v, uint i);
+                      public static string Get() {
+                        IntPtr dv = FindWindowEx(FindWindow("Progman", null), IntPtr.Zero, "SHELLDLL_DefView", null);
+                        IntPtr w = IntPtr.Zero;
+                        while (dv == IntPtr.Zero) { w = FindWindowEx(IntPtr.Zero, w, "WorkerW", null); if (w == IntPtr.Zero) break; dv = FindWindowEx(w, IntPtr.Zero, "SHELLDLL_DefView", null); }
+                        IntPtr lv = dv == IntPtr.Zero ? IntPtr.Zero : FindWindowEx(dv, IntPtr.Zero, "SysListView32", null);
+                        if (lv != IntPtr.Zero) { long r = SendMessage(lv, 0x1033, IntPtr.Zero, IntPtr.Zero).ToInt64(); long cx = r & 0xFFFF, cy = (r >> 16) & 0xFFFF; if (cx > 0 && cy > 0) return cx + "," + cy; }
+                        int sx, sy; SystemParametersInfo(0x000D, 0, out sx, 0); SystemParametersInfo(0x0018, 0, out sy, 0);
+                        return sx + "," + sy;
+                      }
+                    }
+                    '@
+                    [WircGrid]::Get()
+                """.trimIndent()
+                val encoded = Base64.getEncoder().encodeToString(script.toByteArray(Charsets.UTF_16LE))
+                val proc = ProcessBuilder("powershell.exe", "-NoProfile", "-NonInteractive", "-EncodedCommand", encoded)
+                    .redirectErrorStream(true).start()
+                val out = proc.inputStream.bufferedReader().readText()
+                proc.waitFor(30, TimeUnit.SECONDS)
+                val m = Regex("""(\d+),(\d+)""").findAll(out).lastOrNull() ?: return@Thread
+                val px = m.groupValues[1].toFloat()
+                val py = m.groupValues[2].toFloat()
+                // Physical pixels at the primary screen's scaling -> the logical units windows use
+                val scale = try {
+                    GraphicsEnvironment.getLocalGraphicsEnvironment().defaultScreenDevice.defaultConfiguration.defaultTransform.scaleX.toFloat()
+                } catch (e: Exception) { 1f }.coerceAtLeast(0.5f)
+                if (px > 8 && py > 8) cached = (px / scale) to (py / scale)
+            } catch (e: Exception) {
+                // No grid info: windows just don't snap to it
+            }
+        }.apply { isDaemon = true; name = "wIRC desktop grid" }.start()
+    }
+}
+
+/** Whole lines that fit in [height] at [lineHeight], with a little slack for rounding. */
+internal fun wholeLines(height: Dp, lineHeight: Dp): Int =
+    floor((height.value + 0.5f) / lineHeight.value).toInt().coerceAtLeast(1)

src/main/resources/fonts/OFL-Nunito.txt

@@ -0,0 +1,93 @@
+Copyright 2014 The Nunito Project Authors (https://github.com/googlefonts/nunito)
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

src/main/resources/fonts/OFL-Quicksand.txt

@@ -0,0 +1,93 @@
+Copyright 2011 The Quicksand Project Authors (https://github.com/andrew-paglinawan/QuicksandFamily), with Reserved Font Name “Quicksand”.
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

src/main/resources/fonts/OFL-VarelaRound.txt

@@ -0,0 +1,93 @@
+Copyright 2023 The Varela Round Project Authors (https://github.com/alefalefalef/Varela-Round-Hebrew/), with Reserved Font Names 'Varela' and ‘Varela Round’.
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+https://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.