Fix trackpad lag/scroll on Magic Keyboard + sync keyboard layout with host#70
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2extndd wants to merge 40 commits into
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Fix trackpad lag/scroll on Magic Keyboard + sync keyboard layout with host#702extndd wants to merge 40 commits into
2extndd wants to merge 40 commits into
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Two issues, same root cause family — gesture recognizers ingesting Magic Keyboard trackpad events through unsuitable code paths. Bug 1 — Cursor lag / sticky trackpad (issue hugeBlack#47): The main panGestureRecognizer had no allowedTouchTypes filter, so it was also consuming .indirectPointer events (iPadOS 13.4+ trackpad / pointer). UIPanGestureRecognizer has a small recognition threshold before .began and re-arms its state machine between strokes — at the per-frame rate trackpad events arrive, that produces visible stickiness/judder. Other gesture recognizers in the file already filter to [.direct, .pencil] ([0, 2]); the main pan was just missing the same filter. Fix: - Set panGestureRecognizer.allowedTouchTypes = [.direct, .pencil] so it no longer competes for trackpad events. - Override touchesMoved (and touchesBegan to reset accumulators) to handle .indirectPointer touches directly. Uses preciseLocation / precisePreviousLocation deltas with sub-pixel accumulation through the existing accumulatedDeltaX / accumulatedDeltaY fields. Respects cursorMode (.direct → absolute sendMousePosition, otherwise → sendMouseDelta). Bug 2 — Choppy 2-finger scroll: The 2-finger branch of handlePanGesture sent CParsec.sendWheelMsg based on gestureRecognizer.velocity(in:) / 20. Velocity-based scaling against the high-frequency event stream from a trackpad produces large, irregular wheel deltas — perceived as stepped scrolling. Fix: - Add a dedicated UIPanGestureRecognizer with allowedScrollTypesMask = .all and maximumNumberOfTouches = 0 (so it sees scroll-wheel/trackpad-scroll events only, never finger touches). - handleTrackpadScroll uses translation(in:) deltas between callbacks with sub-pixel accumulation (accumulatedScrollX/Y) — same pattern Moonlight iOS uses for its continuous-scroll path. - Keeps the existing velocity-based 2-finger branch in handlePanGesture intact for actual touchscreen 2-finger swipes (those still fire there because the main pan recognizer keeps .direct touches). Regression-safe: - Direct touch mode preserved (touchesMoved still sends sendMousePosition). - External USB/BT mice unaffected — that path is GCMouse-based (Magic Keyboard trackpad does not enumerate as GCMouse on iPadOS, which is why this fix has to live here). - UIScrollView pinch-to-zoom (minimumNumberOfTouches=2) untouched. - 1-/2-finger touchscreen gestures untouched (main pan now restricted to .direct/.pencil; tap recognizers already had [0,2]/[0] filters). - 3-finger tap for virtual keyboard untouched. Deployment target is iOS 14 (project.pbxproj OpenParsec target), so .indirectPointer (13.4+), allowedScrollTypesMask (13.4+), and preciseLocation/precisePreviousLocation (9.1+) are available without #available gates.
Problem: switching the iPad's hardware-keyboard input language (Caps Lock / Ctrl+Space on Magic Keyboard) only switches the iPad's keymap. Parsec's iOS SDK sends MESSAGE_KEYBOARD with raw HID scancodes (see ParsecSDKBridge .sendKeyboardMessage), and the host interprets them through its own current layout. After a switch on the iPad the user sees the wrong characters on the host until the host's layout is changed manually. Issues touching the same area: hugeBlack#46 (special chars not passing through), hugeBlack#50 (uppercase letters with digital keyboard), hugeBlack#54 (Cmd+Space at system level can't be intercepted). Parsec's iOS SDK doesn't expose a Unicode / MESSAGE_CHAR path that would let us bypass host layout — the only public keyboard message is scancode-based. So instead of trying to translate characters on the client side, we get the host to switch its layout in lock-step with the iPad. Approach (matches macOS's built-in "select previous input source" workflow): 1. LanguageSyncCoordinator (in ParsecViewController.swift) owns a 1×1 alpha-0 LanguageSyncTextField. The field installs an empty inputView so the soft keyboard never appears, and is made first-responder while the streaming session is on screen. 2. UITextInputMode.currentInputModeDidChangeNotification only fires when a text-input first responder exists — the hidden field satisfies that. The coordinator listens and pulls the new BCP-47 language code ("en-US" / "ru-RU" / "zh-Hans") from the notification's object. 3. On a real change (not a redundant fire), the coordinator calls back into the view controller, which fires a configurable host hotkey via CParsec.sendVirtualKeyboardInput. Default is Ctrl+Space (the macOS built-in "select previous input source" shortcut). Cmd+Space, Alt+Space, and Alt+Shift (Windows convention) are also available. The host needs the matching layouts in matching order — same constraint as the native macOS toggle. 4. Modifier release is delayed (~50 ms) past the normal-key release so the host sees the chord intact (CParsec's sendVirtualKeyboardInput already releases the normal key async at +20 ms, so a synchronous modifier release would race ahead of it). 5. LanguageSyncTextField overrides pressesBegan/Ended/Changed/Cancelled and does NOT call super, so the field never consumes hardware-keyboard events as text input — those continue to flow up the responder chain to ParsecViewController.pressesBegan, where the existing scancode pipeline handles them unchanged. Same trick Moonlight iOS uses in StreamView.m (their comment: "This will prevent the legacy UITextField from receiving the event"). First-responder cooperation: The view controller already conforms to UIKeyInput and takes first-responder status when the soft keyboard is shown (3-finger tap → showKeyboard / setKeyboardVisible(true)). To avoid two competing responders, the coordinator yields its hidden field before the VC becomes FR and reclaims it after the VC resigns FR (in setKeyboardVisible(false)). Settings UI: - SettingsHandler.syncKeyboardLayout (Bool, default true) — kill switch. - SettingsHandler.layoutSyncHotkey (LayoutSyncHotkey, default ctrlSpace) — which combination to send. - Exposed in SettingsView under a new "Keyboard" section. Regression-safe: - syncKeyboardLayout = false → no coordinator, no hidden field, no observer — the file is dormant. Existing behaviour exactly preserved. - Hardware-keyboard scancodes still flow through ParsecViewController .pressesBegan/Ended unchanged (field forwards without consuming). - Soft-keyboard flow (3-finger tap, virtual keyboard, accessory toolbar) untouched — coordinator yields FR before becomeFirstResponder() and reclaims after resignFirstResponder(). - Direct touch mode, GCMouse path, UIScrollView pinch-to-zoom — all untouched. Deployment target is iOS 14, so UITextInputMode (4.2+), currentInputModeDidChangeNotification (4.2+), and primaryLanguage (4.2+) need no #available gates.
…ey capture Three follow-ups from real-device feedback. 1) Scroll direction was inverted relative to native iPad / macOS feel. Added `naturalScrolling` toggle (default ON, flips the sign so swipe-down moves content down). Direction is applied to both the live drag and the inertia tail so they stay consistent. 2) 2-finger trackpad scroll stopped dead the moment the fingers left the surface — felt jerky compared to the rest of iPadOS. Added a CADisplayLink- based momentum/inertia tail in handleTrackpadScroll: on .ended we sample `gestureRecognizer.velocity(in:)`, convert pts/sec → pts/frame at 60 Hz, and keep emitting sendWheelMsg with exponential decay until the per-frame delta falls below 0.5 px. Decay multiplier is linearly interpolated from the new "Inertia Strength" slider (0 → 0.80 multiplier ≈ ~150 ms glide, 1 → 0.98 ≈ ~2 s glide). Any new touch — finger, pencil, trackpad pointer — cancels the tail via stopScrollMomentum() in touchesBegan, matching native UIScrollView behaviour. Also tears down on viewWillDisappear. 3) Scroll feel is now configurable via two new sliders / two new toggles in the Interactivity section: - Scroll Sensitivity (decoupled from Mouse Sensitivity) - Natural Scrolling - Scroll Inertia - Inertia Strength 4) Best-effort iPadOS system-shortcut capture. iPadOS shell swallows Cmd+letter combos before they reach any app, which is why Cmd+A doesn't "select all" on the host across a Parsec session. Registered an explicit UIKeyCommand for each (letter|digit|punctuation) × (Cmd / Cmd+Shift / Cmd+Opt / Cmd+Ctrl / Opt / Opt+Shift) so the responder chain routes them to us via handleCapturedKey instead. On iOS 15+, each command sets `wantsPriorityOverSystemBehavior = true` to further suppress system text-input handling for the same chord. handleCapturedKey translates the matched chord into a modifier-press / key-press / key-release / modifier-release scancode sequence on the host. Uses sendVirtualKeyboardInput(text:, isOn:) for each step so the wrapper's auto-Shift logic doesn't double-press Shift (we manage modifiers explicitly from cmd.modifierFlags). Modifier releases are timed +60 ms past key release so the chord stays intact on the host (CParsec releases the normal key async at +20 ms). Honest constraint: Cmd+Space (Spotlight), Cmd+H (Home), Cmd+Tab (app switcher), Globe key shortcuts, and swipe-up-from-bottom gestures are wired below the responder chain in SpringBoard — no sandboxed iPad app can intercept them via public APIs. PR hugeBlack#64's Opt→Cmd remap on the host is the ecosystem-standard workaround for the most common Cmd+Tab case; not duplicated here. Toggle: SettingsHandler.captureSystemKeys (default ON), exposed as "Capture System Shortcuts" in the Keyboard section. Regression-safe: - `scrollMomentum = false` → no display link, ended-gesture path drops back to the original "stop dead" behaviour. - `captureSystemKeys = false` → falls through to `super.keyCommands` (nil by default), no UIKeyCommands registered, behaviour exactly as before. - `naturalScrolling = false` → original direction restored. - Scroll sensitivity defaults to 1.0 → same scaling as the previous shared-with-mouse path.
…hotkey labels Three issues from real-device testing: 1) Keyboard toolbar appearing by default (regression from language sync). LanguageSyncCoordinator makes a hidden LanguageSyncTextField the first responder so UITextInputMode.currentInputModeDidChangeNotification keeps firing. But iOS walks the responder chain looking for inputAccessoryView — the chain hits ParsecViewController, which provides the OpenParsec keyboard toolbar (⌘ ⌃ ⌥ ⇧ F1-F12). Result: the toolbar showed on every connection without any user action. Fix: LanguageSyncTextField now returns its own non-nil (empty) UIView for inputAccessoryView, halting the chain walk before iOS reaches the VC's toolbar. The toolbar still appears when the user explicitly invokes showKeyboard() (3-finger tap or the on-screen button), via the existing yield/reclaim dance. Also cleared inputAssistantItem.leadingBarButtonGroups/trailingBarButtonGroups to suppress the iPad shortcuts bar (predictive text / cut/copy/paste chevrons) that hardware-keyboard text fields show by default. 2) Scroll inertia not visible even with toggle on. Root cause: iPad's trackpad applies its own short deceleration to scroll events while reporting them, so by the time the pan recognizer transitions to `.ended`, recognizer.velocity(in:) is near zero. The momentum tail was seeded with near-zero velocity → immediate stop. Fix: track translation deltas with timestamps during `.changed` and remember the peak velocity. Seed momentumVelocityX/Y from peak at `.ended` instead of recognizer.velocity. Added a minimum-speed gate (80 pts/s) so a slow drag doesn't trigger an unwanted tail. 3) Layout sync hotkey labels too Windows-centric. Reordered the picker — Ctrl+Space (macOS default) is now first and explicitly labeled as such. Cmd+Space / Opt+Space follow with Mac-style ⌃ ⌥ ⌘ glyphs. Alt+Shift is kept but labeled "(Windows)" so users know when it's relevant. Off moved to the bottom (least-used). Regression-safe: - Hidden field is still first responder during streaming → notification still fires for language changes. - showKeyboard() flow (3-finger tap, on-screen button) untouched — the toolbar still appears when explicitly invoked. - scrollMomentum = false → no peak tracking is consumed, behaviour matches the previous "stop dead" path exactly.
…ange User-reported issues from device testing. Display selection wasn't persisted. Picker in ParsecView (lines 271-287) listed host displays from DataManager.model.displayConfigs (populated via user-data event 12 from the host) and forwarded the choice via updateHostVideoConfig — but nothing remembered the choice. User had to re-pick on every reconnect. Fix: - SettingsHandler.savedDisplayOutput @AppStorage (String, default ""). - changeDisplay writes the picked id there ("none" is the "Auto" sentinel and isn't worth remembering, so it clears the saved value instead). - In ParsecSDKBridge.handleUserDataEvent case 12 (display list arrival), if the saved id is still in the newly-arrived list, restore it automatically and re-fire updateHostVideoConfig. In-overlay "Resolution" picker had no effect. The "Resolution" menu in the in-stream overlay wrote new dimensions into DataManager.model and called updateHostVideoConfig, which sends setVideoConfig (user-data id 11) to the host. The Parsec host honours bitrate / constantFps / output via that user-data, but the resolution field is advisory — it's only read at ParsecClientConnect time. And ParsecSDKBridge.applyConfig() further hardcoded resolutionX/Y to 0 ("use host default"), which silently overwrote any value connect() had set seconds earlier. Fix (option a from the audit — reconnect on resolution change): - CParsec.lastConnectedPeerID now tracks the peer we last successfully connected to (set in static connect()). - changeResolution updates SettingsHandler.resolution + model dims, then cleanly disconnects and reconnects via the saved peer ID after a 300 ms debounce. applyConfig is re-issued after the reconnect. - ParsecSDKBridge.disconnect() resets didSetResolution = false so the first case-11 echo after the reconnect re-pushes our desired value instead of clobbering it with whatever the host happens to report. - ParsecSDKBridge.applyConfig() now reads SettingsHandler.resolution width/height into both video.0 and video.1 instead of hardcoding 0. Regression-safe: - Fallback in changeResolution if lastConnectedPeerID is nil (shouldn't happen mid-session): falls back to the old updateHostVideoConfig path so at least the bitrate/output side of setVideoConfig still gets pushed. - displayConfigs auto-restore is silent (no UI surprise) — if the saved display id is no longer in the host's list, nothing happens. - ParsecResolution.host (= 0 width/height) is preserved as a valid choice in applyConfig — the user can still pick "Host Resolution" to leave things on host default.
…sends, polish UX, low-latency mode Acts on findings from a three-agent audit of network latency, resolution- change UX, and bugs/regressions in the last batch of commits. P0 (blockers — would break audio/cursor after a resolution change): * ParsecSDKBridge.connect() now sets backgroundTaskRunning = true at the top, before startBackgroundTask() spawns the two `while backgroundTaskRunning` poll loops. Previously disconnect() set it false and the next reconnect's freshly-spawned loops read false on entry and exited immediately — leaving the new session with no audio callbacks, no cursor image updates, no user-data events. * keyCommands now caches the 286-element registry in a static var instead of rebuilding it on every iOS query (which happens on every key event and every first-responder change). Comment from the prior commit claimed caching but the implementation did not. * Every input-sending method on ParsecSDKBridge gates on backgroundTaskRunning: sendMouseMessage / sendMouseClickMessage / sendMouseDelta / sendMousePosition / sendMouseRelativeMove / sendKeyboardMessage / sendVirtualKeyboardInput (both variants) / sendGameControllerButtonMessage / sendGameControllerAxisMessage / sendGameControllerUnplugMessage / sendWheelMsg. Otherwise the scroll- momentum CADisplayLink, ongoing touchesMoved, pressesBegan etc. could fire ParsecClientSendMessage against a torn-down session during the 300 ms blackout in changeResolution — at best a wasted message, at worst a NULL deref deep in the SDK. * Also fixed the LanguageSyncTextField.inputAccessoryView override that was declared read-only (UIResponder's property is mutable; Swift won't override mutable with get-only). Added a no-op setter. This actually caused the build that finally ran post-outage to fail. P1 (UX / correctness fixes that ride along with the reconnect path): * ParsecView now owns an `isReconfiguring` @State. While true: - ParsecStatusBar.poll() early-returns (otherwise the 0.2 s timer fires "Disconnected (code X)" alert during the deliberate gap). - A "Switching resolution…" overlay is rendered with zIndex(3). - The GLKViewController is paused (`isPaused = true`) so the framebuffer keeps the last decoded frame instead of going black — the single biggest visual improvement to the gap. * The reconnect debounce dropped from 300 ms to 100 ms (combined with the 20 ms drain sleep inside ParsecSDKBridge.disconnect() this still covers the worst-case poll-loop iteration). Net user-visible gap with the overlay is ~600 ms including first-frame arrival. * Dropped the redundant applyConfig() call right after connect() in changeResolution — connect() already installs the fresh ParsecClientConfig and applyConfig() against a just-negotiated session was racy. * LanguageSyncCoordinator no longer fires a spurious Ctrl+Space on session start. The initial lastLanguage seed is deferred to the next main-runloop tick (textInputMode is sometimes still nil immediately after becomeFirstResponder), and a hasSeenInitialLanguage gate swallows the first observed change without firing the hotkey. Also added a 150 ms debounce so rapid Caps-Lock taps can't interleave modifier press/release on the host. * ParsecSDKBridge.handleUserDataEvent case 12 now restores the saved display only ONCE per session via a didRestoreSavedDisplay flag — the host re-advertises displays on sleep/wake/hot-plug and the previous version would re-fire updateHostVideoConfig each time, causing brief re-encode flicker. P2 (latency reductions): * Default preferredFramesPerSecond changed from 60 to 0 ("device max"). On a 120 Hz ProMotion iPad this halves worst-case present latency (~16 ms → ~8 ms). Mirrors default in SettingsView's @AppStorage. * New "Low Latency Mode" toggle in Settings → Graphics. When on, flips preferredFramesPerSecond = 0, decoder = h265, noOverlay = true. Also gates the captured-key path's artificial 20 ms / 60 ms hold-times: in Low Latency Mode the keyup + modifier release fire synchronously, saving ~80 ms on every Cmd-shortcut. (Outside Low Latency the old asyncAfter path is kept for safety with finicky apps.) * touchesMoved / handlePanGesture mouse-delta accumulator now uses .rounded(.toNearestOrAwayFromZero) before truncating to Int32. Previously Int32() silently truncated, so slow finger movements at low sensitivity swallowed events until a whole pixel accumulated ("stickiness" in text selection / fine UI). Sub-pixel residual is still carried. * startBackgroundTask now scales the SDK poll timeout to the configured FPS (8 ms at 120 Hz, 16 ms at 60 Hz) and runs on DispatchQueue.global at .userInteractive QoS instead of default — appropriate for the audio-callback / cursor-update / event hot path. * ParsecGLKRenderer.glkView(_:drawIn:) now gates the PictureInPictureManager.captureFrame call on isPiPActive || isStarting. Previously it ran on every frame even with PiP inactive, wasting a glReadPixels stall on the critical render path. P3 (polish): * CParsec.disconnect() clears lastConnectedPeerID. Doesn't break the reconnect dance (changeResolution captures the peer locally before calling disconnect), but stops stale state from leaking into future flows. * handleTrackpadScroll early-returns at scroll-pan .changed when scrollView.zoomScale > 1.0 — otherwise zoomed-in trackpad scrolling scrolled BOTH the local view and the host, double-panning. * Peak velocity for scroll inertia is reset if there's been a >200 ms pause since the last .changed (handles "lift, pause, drag again" patterns so a slow second drag doesn't inherit the peak from the first one). * Added touchesEnded / touchesCancelled overrides that zero accumulatedDeltaX/Y for .indirectPointer touches — prevents residual drift accumulating across gestures at low sensitivity. * disconnect() now sleeps 20 ms after ParsecClientDisconnect so the old poll loops definitely exit before connect() spawns new ones, eliminating a brief window of 2× poll rate.
Two fixes: 1) Build break: the explicit `init(showMenu:showDCAlert:DCAlertText:parsecViewController:)` on ParsecStatusBar shadowed the memberwise init, so the new `isReconfiguring` binding was rejected at the call site even though the @binding was declared. Updated the init to take and assign isReconfiguring. 2) Local cursor overlay (user request: host-streamed cursor lags by network RTT; want an immediate client-side fallback). - New @AppStorage `localCursorOverlay` (default off) — exposed under Interactivity → "Local Cursor Overlay". - When on, `ParsecViewController.updateImage` hides the host cursor UIImageView (`u`) and shows a local UIImageView using SF Symbol `cursorarrow` with white tint + drop shadow so it reads against any background. - Position is tracked client-side from input events (touchesMoved indirectPointer + handlePanGesture, both direct and touchpad branches). Seeded from the host's last known position so toggling mid-session doesn't jump. - Clamped to contentView bounds so it can't escape the streaming view. - When off, behaviour is identical to before — the tracker still updates so flipping the setting lands on a sane position, but the overlay UIImageView is hidden. Caveat: in touchpad (delta) mode the local cursor is a pure client-side prediction. If the user clicks while the prediction hasn't caught up with the host, the host clicks at its own current position, not the local cursor's. Cmd-shortcuts and direct mode are unaffected.
Audit of 4ad1d42 found 4 real issues; this commit fixes them and adds the user's Windows-host key-remap toggle. User request — Windows host modifier remap. A user streaming TO a Windows host from a Mac-style iPad keyboard wants Cmd+C to "just work" (= Ctrl+C on Windows). Implemented as a low-level scan-code swap in ParsecSDKBridge so every consumer (UIKey hardware- keyboard path, virtual on-screen keyboard, UIKeyCommand-captured Cmd- shortcuts) gets the swap with no per-caller awareness. Mapping when SettingsHandler.windowsHostKeyboardRemap == true: 227 (LGUI / Cmd) ↔ 224 (LCTRL / Ctrl) 231 (RGUI / RCmd) ↔ 228 (RCTRL / RCtrl) 226 (LALT / Opt) unchanged — same physical key + same Windows mapping 230 (RALT) unchanged 225 (LSHIFT) / 229 (RSHIFT) / printable keys unchanged Surfaced as "Windows Host Remap" toggle under Settings → Keyboard (default off). Off = identity, behaviour preserved. H1. changeResolution swallowed connect() failures. If the host went offline during the 100 ms gap, connect() returned non- PARSEC_OK but changeResolution dropped the result via `_ =` and the isReconfiguring overlay timed out 500 ms later onto a frozen frame. Now: capture the status, and on error short-circuit the overlay and surface a "Reconnect failed (code N)" disconnect alert through the existing showDCAlert/DCAlertText pipeline. H2. Two-resolution spam-tap race. If the user picked a second resolution inside the 600 ms reconfigure window, two disconnect→connect cycles overlapped — the SDK state machine doesn't like that. Added `guard !isReconfiguring else { return }` at the entry of changeResolution. H3. Async keyup after disconnect in sendVirtualKeyboardInput(text:). The 20 ms-delayed keyup release block on DispatchQueue.global() didn't re-check `backgroundTaskRunning`, and the gap exactly matches the new drain sleep in disconnect() — so half the time a disconnect that lands right after a keydown would fire a `ParsecClientSendMessage` into a torn-down client. Added `guard self.backgroundTaskRunning else { return }` inside the asyncAfter closure. M3. Local cursor first-input jump from (1, 1). localCursorPosition was seeded from CParsec.mouseInfo.mouseX/Y at viewDidLoad time, but the host hasn't echoed a cursor event yet so those default to MouseInfo's initial (1, 1) — top-left corner. The first trackpad input would jump the cursor from the corner to wherever the input landed. Now seeded to contentView.center instead. Notable non-finding — host cursor visibility on the Mac itself. User asked: when local overlay is enabled, also hide the cursor on the Mac's physical display. Investigation: the Parsec SDK has no client→host "hide cursor" message — every outbound message type is keyboard/mouse-button/mouse-motion/mouse-wheel/gamepad, no cursor. ParsecClientConfig has no cursor-visibility field. The cursor on the Mac is drawn by macOS itself before Parsec captures the framebuffer. Hiding it requires a host-side helper (Hammerspoon hotkey calling CGDisplayHideCursor) that the iPad would invoke through a regular keyboard message — not something we can do purely client-side. Left client behaviour unchanged (already hides the streamed host cursor image when overlay is on).
User reports of v3 failures, all real:
1) Natural Scrolling toggle was backwards. With Mac on its default
Natural Scrolling = ON, we want translation deltas forwarded WITHOUT
inversion (host does the inversion itself). I had the sign flipped:
ON meant client-side invert, which double-inverted with the host →
inverted feel. OFF meant no client invert, which on a Natural-host
reads as "OK as classic" but felt "broken" because the user's input
expectation was natural.
Flipped: toggle ON → direction = +1 (no client-side invert, host
does natural). Toggle OFF → direction = -1 (classic wheel feel).
2) Scroll accumulator used Int32() truncation instead of rounded
(.toNearestOrAwayFromZero), same regression we already fixed on the
mouse path. Slow trackpad scrolls vanished into sub-pixel
accumulation until enough whole pixels piled up. Applied rounding
to both handleTrackpadScroll's .changed branch and the
scrollMomentumTick.
3) Local cursor looked wrong (Mac-style arrow via SF Symbol
`cursorarrow`) and didn't appear to move. Two fixes:
- Replaced the UIImageView+SF-Symbol with a UIView circle dot:
13 pt diameter, light-gray fill (0.92 alpha 0.85), 0.5 pt dark
border, soft 1 pt shadow. Matches iPadOS native pointer style.
- Seeded position from `contentView.bounds.midX/midY` inside
`viewDidLayoutSubviews`, gated by a `hasSeededLocalCursor` flag.
viewDidLoad read midX/Y as 0 because the view hadn't laid out
yet, parking the cursor at the corner where it visually appeared
"stuck".
- In touchesMoved + handlePanGesture (touchpad branch) the cursor
position now updates at full CGFloat precision regardless of
whether the rounded host delta produced a non-zero Int. The
cursor glides smoothly even when individual events don't
produce a whole-pixel host send.
4) Resolution change → "Disconnected 20". The 100 ms reconnect gap
wasn't enough for the SDK to fully tear down (audio queue, poll
loops, internal session state) before connect(). Bumped to 600 ms.
Status-check branch (added in v3) already surfaces the alert if
it still fails.
5) Display selection didn't survive between sessions. Parsec
regenerates display ids across some session boundaries, so the
`config.contains(where: { $0.id == saved })` check would miss the
physically-same display under a new id. Added a name+adapter
fallback: SettingsHandler.savedDisplayName persists the
human-readable label, case-12 restore tries id first, then name.
On successful name-match it re-syncs the new id so future restores
are fast.
Not fixed in this commit — explained to user:
* Streaming resolution requested via parsecClientCfg.video.0.resolutionX/Y
is mostly advisory on a macOS host with a real display. Parsec on Mac
captures the physical display at its native resolution and ignores
small client requests like 1920x1080 (no virtual-display driver
involved). The honest knobs for bandwidth reduction are bitrate and
H.265.
* Hiding the cursor on the Mac's own physical display is not
expressible through the Parsec SDK (no client→host cursor message,
no config field). Requires host-side helper.
User on v3 reports two regressions my "polish" introduced — both my own fault. Loosening overly-defensive gates. Language sync wasn't firing. The initial-seed + 150 ms debounce gates I added (defensive against spurious-at-startup and rapid-double-fire) were swallowing legitimate notifications. On user's setup the very first Caps-Lock toggle after session start fired the notification, hit the `!hasSeenInitialLanguage` branch, stored the new value, returned without dispatching the hotkey. The next toggle would compare against the value we stored on the first one — same value, no diff, no fire. Loosened to: any genuine `lang != lastLanguage` transition dispatches. A 50 ms debounce stays in for OS-level double-fire coalescing only. First fire might now sometimes be redundant — harmless trade for actually working. Scroll inertia toggle was on but no inertia. Two problems: - The 200 ms peak-velocity reset (P3 polish to handle "lift, pause, scroll again" patterns) was zeroing the peak DURING iPadOS's own post-lift deceleration tail. Those tail-end .changed events arrive further apart as the tail fades; by the time .ended fires the peak read as zero. Raised to 1.0 s. - The 80 pts/s minimum-seed-speed threshold rejected most natural-feel scrolls — only a hard flick exceeded it. Lowered to 20 so gentle scrolls also get a short tail.
User requests + groundwork while audit subagents investigate v4 regressions: * Layout sync hotkey: added ⌃⇧ option (Ctrl+Shift). Some macOS users prefer this binding for "Select previous input source". Surfaced as "⌃ + ⇧ (macOS alt)" in the picker. * Mouse acceleration: new `mouseAcceleration` AppStorage setting (0..1.5, default 0 = pure linear). When > 0, per-event delta gets a speed-proportional boost: `effective = sensitivity + accel × (|delta|/5)`, so fast flicks travel further than slow drags — mirrors macOS pointer acceleration without copying its full curve. Slider in Settings → Interactivity between Mouse Sensitivity and Scroll Sensitivity. * Both `touchesMoved` (.indirectPointer / trackpad) and `handlePanGesture` (touchscreen) paths now route through a shared `effectiveDeltaScale` helper so behaviour stays consistent. Note — three subagents still running on bigger issues the user flagged: no inertia / "block" feel, resolution-menu crash, display persistence. Their fixes will follow in a separate commit.
… gate Diagnostic from a deep subagent audit: the inertia path was wired and firing, the user just couldn't see the result because the decay loop killed itself almost instantly. Root cause hugeBlack#1 — stop threshold 0.5 pts/frame was an inertia executioner. After seeding `momentumVelocity = peak / 60` (pts/frame), default sensitivity, a normal 200 pts/s scroll seeded ≈ 3.3 pts/frame. With decay 0.89 (strength 0.5 → `0.80 + 0.18 × 0.5`) the loop hit the 0.5 floor in `log(0.5/3.3) / log(0.89) ≈ 17` frames ≈ 270 ms — felt exactly like "no inertia" because iPadOS's own pre-`.ended` deceleration tail had already consumed most of the visible motion. Floor lowered to 0.05 pts/frame — same 200 pts/s scroll now runs ≈ 40 frames ≈ 660 ms of visible glide, which is the macOS-trackpad feel the user was expecting. Root cause hugeBlack#2 — decay range was too tight. 0.80–0.98 compressed the strength slider into "snappy vs slightly more snappy". Widened to 0.90–0.995 so the bottom is still ~10 frames (snappy, no glide) and the top is multi-second glide. Default strength 0.5 lands at 0.9475 (~30-frame half-life ≈ 500 ms). Root cause hugeBlack#3 — touchesBegan killed momentum on .indirectPointer. Every time the iPadOS trackpad cursor crossed a region boundary, or the user lightly rested their palm on the trackpad, the `touchesBegan` override fired `stopScrollMomentum()` regardless of touch type. Gated to fire only on `.direct` and `.pencil` touches. Indirect-pointer touches still reset the mouse accumulator (which is desired) but no longer kill scroll inertia. This also explains why the user complained the scroll felt "ragged with fingers on the trackpad": the wheel-tick output during iPadOS's deceleration tail (where per-event delta is fractional) had Int32 truncation patterns like 1,0,0,1,0,1,1,0,0,1 — bursty at the host. The accumulator-rounding fix (.toNearestOrAwayFromZero) we shipped earlier helps; the touchesBegan gate removes the additional random momentum cancellations that were stacking on top.
Three independent subagent audits pointed at the same v3/v4 release weeks — all now fixed. Resolution menu crash (subagent hugeBlack#2). On iOS 14.0–14.4 the UIMenu bridge crashes when SwiftUI lowers a `Menu { Button { if Label else Text } }` body to `_ConditionalContent<Label, Text>` — the bridge dereferences a nil SF-Symbol glyph view when materialising menu items. Deployment target is iOS 14, so any user on 14.0–14.4 (still common) hits this every time they tap the Resolution menu. Replaced both the Resolution and Bitrate menu rows with a homogeneous `HStack { Text(...) if current { Spacer; Image("checkmark") } }` inside the Button — visually identical, no conditional view wrapper, safe across all iOS 14 dot releases. Display persistence (subagent hugeBlack#3). `didRestoreSavedDisplay` was reset only in `ParsecSDKBridge.disconnect()`. But the dominant reconnect path is "stream errored → user dismisses alert → reconnects" which does NOT route through `disconnect()` — `ParsecSDKBridge` is a singleton, so the flag stayed `true` across sessions and case-12 silently never re-fired the saved-display restore. Moved the reset into `connect()` (alongside `backgroundTaskRunning` and `didSetResolution`). Every fresh connect now attempts restore when case-12 arrives. Display switch debounce (same subagent). User reported needing to tap a display twice or three times for the switch to land. `setVideoConfig` is fire-and-forget at the iOS layer; the host's encoder can be in the middle of a reset triggered by a prior config change and drop the next message that arrives. `updateHostVideoConfig` now resends the same payload after 250 ms (idempotent — re-applying the same output is a no-op on the host when it's idle, but recovers when the first message was dropped). A follow-up `getVideoConfig` at +450 ms asks the host to echo back its current state, so case-11 confirms the switch landed. Both resends gate on `backgroundTaskRunning` to avoid firing into a torn-down session.
Previous commits referenced SettingsHandler.mouseAcceleration / without the underlying @AppStorage being declared — Edit operations on the expected adjacent-line position failed silently because localCursorOverlay sits between mouseSensitivity and scrollSensitivity. Three subsequent CI runs (aca422b, fc8357f, 5d31035) were red because of this. Declared in both SettingsHandler (static source of truth) and SettingsView (local view binding for the slider).
User reports plugging in an external mouse breaks the on-screen cursor
in three ways. All three turned out to be in GameController's GCMouse
handler — pre-existing bugs plus missing integration with the new
local cursor overlay.
1. **Cursor disappeared when external mouse connected.**
The mouseMovedHandler called `CParsec.sendMouseDelta` but never
updated the local overlay. With Local Cursor Overlay enabled, the
host-streamed cursor (`u` UIImageView) was hidden in favour of our
local view — but our local view never moved because GCMouse input
bypassed `moveLocalCursor`. Visually: no cursor at all.
Fixed: the handler now also calls `viewController.moveLocalCursor`
if it's a ParsecViewController. Cursor follows GCMouse identically
to how it follows the Magic Keyboard trackpad.
2. **Mouse wheel ignored naturalScrolling toggle and scrollSensitivity.**
Pre-existing: the GCMouse scroll handlers used raw `value` directly
and didn't consult any setting. User reported needing to flip the
wheel direction depending on host OS.
Fixed: both yAxis and xAxis handlers now multiply by
`naturalScrolling ? +1 : -1` and `Float(SettingsHandler.scrollSensitivity)`,
matching the trackpad scroll path.
3. **Pre-existing x/y wheel swap.**
`mouseInput.scroll.yAxis` (vertical wheel) was sent as
`sendWheelMsg(x: value, y: 0)` — i.e. horizontal. `xAxis` was sent
as `y`. Vertical scroll showed up as horizontal on the host.
Fixed: yAxis now sends as `y`, xAxis as `x`. (This bug existed
from the original code and has nothing to do with my recent edits;
surfaced because the user finally tried wheel input.)
Note on Windows hosts without external mouse: a separate user report
("на Винде, без подключенной мышки - не отображается ни в каком виде
курсор") is a Windows-host policy — Windows Parsec hosts often set
`cursor.hidden = true` and don't stream a cursor image, leaving the
client with nothing to draw. The workaround is to enable
`Settings → Interactivity → Local Cursor Overlay` so OpenParsec draws
a local cursor regardless of host state. Trackpad input already
drives the overlay; with this commit, GCMouse input does too.
…k deinit The crash the user has been hitting, plus a way to capture future ones. 1. GCMouse moved the local cursor off the main thread (CRASH). e924473 added `vc.moveLocalCursor(...)` inside `mouseMovedHandler`, but GameController input handlers run on GC's private background queue (no handlerQueue=.main is set). moveLocalCursor → clampAndApplyLocalCursor → `localCursorImageView?.center = ...` is a UIView mutation, which traps when off-main. Moving an external mouse with Local Cursor Overlay enabled would crash. Fixed: the overlay update is now dispatched to the main queue; the CParsec send stays inline (thread-safe, no latency hit). Also gated on `localCursorOverlay` so we don't dispatch needless main-queue work when the overlay is off. 2. CADisplayLink deinit backstop. ParsecViewController now invalidates momentumDisplayLink and stops languageSync in `deinit`. CADisplayLink retains its target; a glide still in flight at an unusual teardown would otherwise keep the controller alive and ticking. 3. Crash reporter (answers the user's "can you send crash reports somewhere" question). AppDelegate installs NSSetUncaughtExceptionHandler + handlers for SIGABRT/SEGV/BUS/ILL/FPE/TRAP. On crash it writes Documents/last_crash.log with the backtrace. On the next launch the log is copied to UIPasteboard (so it syncs to a Mac on the same Apple ID via Universal Clipboard, or can be pasted into a chat) and the file is left in Documents. Info.plist gains UIFileSharingEnabled + LSSupportsOpeningDocumentsInPlace so Documents/last_crash.log is browsable in the Files app under "On My iPad → OpenParsec".
Self-contained document covering every change on fix/trackpad-input: project context, commit timeline, per-subsystem change log, all new settings, user-feedback log, outstanding code-review findings, host-side hard limits, files map, CI/release pipeline, test plan, and recommended next steps. Ready to hand to another AI agent for full review.
… button The crash reporter shipped in fc6776c only copied the log to the pasteboard once, at launch — invisible if the user didn't know to check. Made it discoverable: - CrashReporter.consumePending() (delete-on-read) → peek() (non-destructive) + a separate clear(). The log file now survives until the next crash overwrites it or the user clears it. - AppDelegate launch still copies to pasteboard but no longer deletes. - SettingsView → Misc → "Last Crash Log" row: shows "None" when no log exists, "Copy" when one does; tapping copies it to the clipboard and flips to "Copied!". This is the in-app, discoverable path to retrieve a crash without relying on the launch-time clipboard copy or digging in the Files app.
S01 — render resume / black screen on screen return: - ParsecGLKViewController.resume(): setCurrentContext -> isPaused=false (last) -> setNeedsDisplay, the idempotent self-healing recovery for any path that left the render loop paused (changeResolution, PiP, background). - cleanUp() now actually pauses (was an empty stub); glkView pinned with an autoresizing mask so it can't desync / zero-size on re-parent. - viewDidAppear and willEnterForegroundNotification both call resume(). S02 — concurrency & crash hardening: - C1 use-after-free: mouseInfo (holds a CGImage) was written off-main (poll thread + input paths) and copied on main; non-atomic ARC retain/release on cursorImg over-released it. Now guarded by os_unfair_lock — readers take an atomic snapshot, writers mutate via withMouseInfo. updateImage consumes one snapshot per frame. - C2 async-signal-unsafe crash handler: the signal trampoline allocated (ISO8601DateFormatter, String interpolation, backtrace_symbols->malloc, write(to:atomically:)) and could deadlock on the malloc lock. Signal path now uses only async-signal-safe primitives (open/write/backtrace_symbols_fd/close/ raise) with all buffers pre-allocated in install(). NSException handler keeps the rich Foundation path (normal context); a following SIGABRT appends. - C3 poll-loop teardown race: disconnect() drains via a 0.02s sleep, so a fast reconnect could leave two generations of poll loops on one client. Added a monotonic pollGeneration captured per loop; loops exit when it advances. - C5 audio_destroy use-after-free: freed ctx then dereferenced ctx->q to free silence_buf on an already-disposed queue. Now frees silence_buf while the queue is alive and before free(ctx). Verification: code-level only — no local iOS SDK (Command Line Tools only). Requires CI build + on-device test (stream -> background/change-res/PiP -> return repaints; stress cursor motion for crashes; force crash writes log). Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
The case-11 video config already carries a `hostOS` Int but it was decoded and discarded. This wires it through for feature gating (S03 wheel units, S05 Mac Ctrl+Shift gate) and adds the discovery path needed to decode its undocumented values. - SharedModel.hostOS + ParsecSDKBridge.hostOSValue mirror (lock-free Int read from input threads), written in the case-11 main block, reset to -1 in both connect() and disconnect() so a stale value can't bleed across a host switch. - enum HostOS.from(Int): mapping intentionally empty (.unknown for all) until the Int→OS encoding is confirmed empirically — a wrong guess would mis-gate features, so OS-gated features fall back to their manual toggles meanwhile. - Diagnostics channel (Documents/diagnostics.log, append-only) sibling to CrashReporter, with a Settings "Diagnostics Log" → Copy row. case-11 logs `hostOS=<n>` once per host change so the user can capture values against a known Mac and Windows host to fill in HostOS.from. Verification: code-level only (no local iOS SDK). On-device: connect to each host, confirm a stable distinguishing hostOS value appears in the diagnostics log; then the mapping can be filled and S03/S05 gates enabled. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Root cause of the recurring "scroll feels bad / choppy" complaint: iPadOS already synthesizes trackpad/scroll deceleration as a tail of continued `.changed` events, but the client ran its own CADisplayLink inertia on top — double-applied momentum with a velocity discontinuity at the handoff. Worse, the momentum seed was hardcoded to 60 Hz (`peak/60`) while the tick fires at the display rate, so on the 120 Hz M4 iPad the glide distance literally doubled. This is exactly why Moonlight-iOS deleted client inertia. - Removed startScrollMomentum / scrollMomentumTick / stopScrollMomentum, the momentumDisplayLink + velocity/peak state, and the deinit CADisplayLink teardown (nothing left to tear down). - handleTrackpadScroll now forwards native translation deltas only; OS momentum rides in through the `.changed` tail for free. - SC5: the zoom early-return no longer leaks a stale lastScrollTranslation — it syncs the anchor before returning so the first post-unzoom delta doesn't jump the host. - Dropped the now-dead scrollMomentum / scrollMomentumStrength settings and their Settings UI (Scroll Inertia toggle + Inertia Strength slider). Verification: code-level only (no local iOS SDK). On-device: a flick produces one smooth decelerating glide with no speed "kick"; no doubled glide on the 120 Hz iPad; scroll after pinch-zoom doesn't jump. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
updateHostVideoConfig scheduled two resends + a getVideoConfig echo per call, and the case-11 echo wrote bitrate/constantFps straight back into the model. Rapid menu taps stacked timers and a stale echo clobbered the user's in-flight selection (the menu checkmark visibly jumped back). - configRevision token bumped per call; the 250 ms resend and 450 ms echo request drop if a newer call superseded them. - case-11 echo now treats bitrate/constantFps as user-owned: while a change is pending it only CONFIRMS (clears pending on an exact match) and never overwrites the user's selection; resolutionX/Y stay host-authoritative. - pendingUserConfig self-heals after a 1.5 s window so a host that never echoes the exact value can't permanently block future echo adoption. - V2: added the missing `guard backgroundTaskRunning` to sendUserData, so it matches every other send path and can't NULL-deref in the reconnect gap. Verification: code-level only (no local iOS SDK). On-device: rapid bitrate / display taps settle on the last selection without bouncing; no sends fire during the disconnect→reconnect gap. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Q1 [HIGH] hideStatusBar (Bool) and cursorScale (Double) both bound the "cursorScale" @AppStorage key in SettingsHandler and SettingsView, so they corrupted each other at runtime: toggling hideStatusBar off wrote 0 to the shared key and zeroed the cursor scale (invisible cursor); a fractional cursor scale flipped hideStatusBar. Gave hideStatusBar its own "hideStatusBar" key in both files and added migrateLegacyStatusBarKeyIfNeeded() — a one-time launch migration that seeds the new key (original default true) and clamps any out-of-range stored cursorScale (notably 0) back into 0.1...4. Q2 [MED] cancelConnection force-unwrapped pollTimer!, crashing if Cancel was tapped before the connect poll timer scheduled. Now pollTimer?.invalidate(); pollTimer = nil. Verification: code-level only (no local iOS SDK). On-device: toggle hideStatusBar and confirm the cursor stays visible / cursor scale unaffected; tap Cancel immediately on connect without crashing. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
…e (S09) The Magic Keyboard trackpad had a dead-zone at the bottom edge that appeared only inside Parsec. Root cause: prefersPointerLocked captures the pointer, but the project never set preferredScreenEdgesDeferringSystemGestures, so iPadOS kept ownership of the bottom-edge strip for its home-indicator/Control-Center swipe. Locked-pointer motion into that strip was partly eaten by the system recognizer and never reached our handling. Override preferredScreenEdgesDeferringSystemGestures = .all and trigger the update next to setNeedsUpdateOfPrefersPointerLocked(). A second deliberate swipe still hits the system gesture, so Control-Center access is preserved. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
New opt-in: pressing Ctrl+Shift alone (nothing else in between) fires Cmd+Space at the host — the macOS input-source/Spotlight chord the iPad shell swallows. Implemented as a modifier-only chord state machine at the press level (not the per-scancode remap), so raw scancodes are still forwarded unchanged and host shortcuts like Ctrl+Shift+X keep working. Holding Ctrl+Shift then pressing any other key (e.g. Ctrl+Shift+Arrow) trips chordSawOtherKey and does NOT emulate. Alt or Cmd joining the combo disqualifies it too. Gated on a manual @AppStorage("ctrlShiftEmulatesCmdSpace") toggle (off by default, surfaced in Settings → Keyboard) rather than host OS, because S04's host-OS detection still resolves to .unknown until the Int→OS mapping is found empirically. Also adds pressesCancelled to the VC (K7): a cancelled press never delivers pressesEnded, so its key-up was lost — leaving a stuck modifier on the host and corrupting chord bookkeeping. Now forwards the key-up and resets chord state. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
The host/self/friends refresh handlers and the login handler force-cast the URLResponse (`as! HTTPURLResponse`) and force-decoded the JSON (`try! decode`). A network failure delivers a nil/non-HTTP response, and a malformed or partial body fails to decode — either one crashed the app on a flaky connection. Login also force-unwrapped `String(data:data, encoding:.utf8)!` in a debug print, crashing on any non-UTF-8 body. Replace with `response as? HTTPURLResponse` guards and `try?` decodes that no-op on failure, add an explicit network-error alert branch to each handler, and drop the force-unwrapped debug prints. Behavior on the success path is unchanged. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
The home-indicator and pointer-lock child-VC overrides stored their mapping in static [UIViewController: UIViewController] dictionaries, which strongly retain both the parent VC (key) and the ParsecViewController (value). The teardown path clears them on viewWillDisappear, but an abnormal disconnect that skips it leaked the entire Parsec VC — GLKView, gesture recognizers, render plumbing — once per reconnect. Switch both to NSMapTable.weakToWeakObjects(): neither side is retained, so a dropped VC deallocates and its entry auto-empties even without the explicit clear. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
…10 D1/D2) Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
getVersionInfo force-unwrapped Bundle.main.infoDictionary! twice and cast its values implicitly, and carried a "Unknown versino" typo in the fallback. Read the dictionary optionally with typed `as? String` fallbacks and fix the typo. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
… 26.2) The S01 resume() path called EAGLContext.setCurrentContext(_:), which the SDK shipped with Xcode 26.2 has renamed to setCurrent(_:). This broke the CI build (the only compiler we have — no local iOS SDK). Use the new name; discard its Bool return with `_ =`. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
S03 removed client-side momentum on the assumption iPadOS feeds a deceleration tail "for free". It does not on this path: the trackpad scroll handler is driven by a raw UIPanGestureRecognizer (allowedScrollTypesMask = .all, maximumNumberOfTouches = 0), and only a UIScrollView synthesizes post-lift momentum — a raw recognizer gets none. So a flick died instantly and inertia disappeared entirely (user-confirmed on device). Re-seed a decaying glide from the PEAK velocity sampled during .changed (velocity(in:) at .ended is already ~0 because iPadOS pre-decelerates its event stream), driven by a CADisplayLink. Both the per-tick advance and the exponential decay are scaled by the real frame duration (targetTimestamp - timestamp), so the glide distance is identical at 60 Hz and 120 Hz — fixing the original hardcoded `peak/60` doubling bug without throwing the feature away. Glide is cancelled on a new scroll, zoom, and view teardown (deinit + viewWillDisappear) so the link can't retain the VC or send wheel msgs into a dead session. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
A monitor switch is a fire-and-forget setVideoConfig with a single 250 ms resend. Switching re-inits the host encoder for the new output; requests landing during that reset are dropped, with no confirmation or further retry. That is the "needs two or three taps" symptom — and why the workaround "select the current monitor, then the target" worked: it spaced two sends by a human delay long enough for the host to settle. Close the loop: track the requested output as pendingOutput, re-assert it on a widening schedule (0.35/0.8/1.5/2.5 s) until the case-11 echo reports it as the host's current output, then stop. Each resend is idempotent (reapplying the active output is a host no-op), so over-asserting is harmless; under-asserting was the bug. The echo is only READ for confirmation, never written back into model.output, so a host that omits/normalizes the field can't clobber the user's selection (same caution as the bitrate confirm guard). "none" (Auto) has no stable id to confirm against, so it keeps the plain base send. The cap + revision guard ensure a host that never echoes a match can't leave the guard pending or stack retries across a newer change. Session-restore (case 12) rides the same path, so a remembered display reasserts too. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Backgrounding without PiP previously dropped the Parsec session the instant the app resigned active, forcing a full reconnect (with its connect handshake + 0.5s delay) on return. Now SceneDelegate opens a finite UIBackgroundTask keep-alive window instead: a quick app-switch that returns inside the window resumes the still-live connection instantly, while staying away past it (or the OS reclaiming the time via the task's expiration handler) falls back to the existing disconnect+reconnect path. The expiry path tears the SDK session down synchronously (CParsec.disconnect) before releasing the background-task assertion, matching the PiP-stop path's suspend-hazard guard — relying on the async UI-notification to reach disconnect() risks iOS suspending us first. GLKViewController auto-pauses its render loop on resign-active, so no GL work runs during the window. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Three bugs found reviewing the branch (main...fix/trackpad-input): - MainView.connectTo reassigned pollTimer without invalidating an in-flight one. A background-reconnect (onShouldReconnect -> connectTo) or a rapid re-tap during the connecting phase orphaned the old repeating timer; both then fired, racing setView(.parsec)/showBaseAlert. Invalidate before scheduling. - The Ctrl+Shift->Cmd+Space chord (S05) fired on the FIRST of the pair releasing while the other was still held: dropping Ctrl to continue with Shift+<key> spuriously emitted Cmd+Space. Fire only once the pair has fully lifted (neither Ctrl nor Shift held), matching the documented intent. - pendingOutput (String?) was read off-main in the display-switch retry closure while mutated on main — a data race on a non-atomic reference, not the 'benign plain-read' the comment claimed. Read it on the main queue. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
A single non-OK getStatusEx poll on a jittery link is usually the BUD transport mid-recovery (loss/RTT spike), not a real disconnect. Alerting on the first bad poll tore down healthy sessions on unstable networks. Now require 5 consecutive non-OK polls (~1s at the 0.2s interval) before showing Disconnected; any OK poll resets the streak. A genuine drop persists and still surfaces within ~1s. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
The cursor path sent mouse deltas at the UIKit event rate, sub-sampling fast trackpad flicks into large jumpy steps. Iterate coalescedTouches (up to 120 Hz) and sum per-sample deltas; each sample's precisePreviousLocation chains to the prior sample, so the full motion path is reconstructed and the cursor tracks fast movement smoothly. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
audio_cb copied frames*4 bytes into a fixed 4096-byte AudioQueue buffer with no bound. Normal ~10ms chunks stay well under the limit, but an oversized chunk delivered during recovery on a flaky link overran the allocation. Clamp the copy length to BUFFER_SIZE. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
…eadable -6023
Language-layout sync silently died after the soft keyboard was dismissed via
the toolbar Done button, a swipe-down, or any system-driven hide: only
setKeyboardVisible(false) reclaimed first responder for the hidden
LanguageSyncTextField, so currentInputModeDidChangeNotification stopped firing.
Reclaim in keyboardWillHide (the universal dismiss funnel), deferred and guarded
on !keyboardVisible so it never fights an in-progress show; the field's empty
inputView means reclaiming never re-pops the keyboard.
Also includes the manual language-switch macro: a bare backtick (`) fires
⌘Space at the host (opt-in, off by default). It rides remapKeyForHostIfNeeded,
so with Windows Host Remap on it lands as Ctrl+Space — Cmd+Space on a Mac host,
Ctrl+Space on a Windows host. Auto-repeat and the matching key-up are swallowed
so holding the key doesn't spam input-source switches.
And: decode -6023/-6024 ("Unable To Negotiate A Successful Connection") into a
plain-language network/NAT hint instead of a bare error code; unknown codes
still show the raw value.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Summary
Three related hardware-input fixes for Magic Keyboard on iPad. Two trackpad bugs (no new feature) plus a long-standing language-layout pain point.
Bug 1 — Cursor lag / sticky trackpad (closes #47)
The main
UIPanGestureRecognizerinviewDidLoadhad noallowedTouchTypesfilter, so it was also ingesting.indirectPointerUITouches (Magic Keyboard trackpad / iPad pointer). Every other recognizer in the same file already filters to[0, 2](direct + pencil); the main pan was just missing it. The recognizer's small movement threshold and per-stroke state-machine churn against the per-frame trackpad event rate is what users see as the "sticky / juddery" cursor.Filtered the main pan to
[.direct, .pencil]and added atouchesMovedoverride that handles.indirectPointerdirectly usingpreciseLocation - precisePreviousLocationdeltas through the existingaccumulatedDeltaX/Ysub-pixel accumulator. RespectscursorMode(direct → absolutesendMousePosition, touchpad → relativesendMouseDelta).Bug 2 — Choppy 2-finger scroll on trackpad
The 2-finger branch of
handlePanGesturesentsendWheelMsgbased onvelocity(in:) / 20. Velocity-based scaling against the high-frequency event stream from a trackpad produces large, irregular wheel deltas — perceived as stepped scrolling.Added a dedicated
UIPanGestureRecognizerwithallowedScrollTypesMask = .allandmaximumNumberOfTouches = 0so it sees scroll-wheel / trackpad-scroll events only, never finger touches. The handler usestranslation(in:)deltas between callbacks with sub-pixel accumulation — same pattern Moonlight iOS uses inStreamView.m::mouseWheelMovedContinuous. The existing velocity-based 2-finger branch inhandlePanGesturestays put for actual touchscreen swipes (still fires for.directtouches).New feature — Mac↔iPad keyboard layout sync (touches #46, #50, #54)
When the user switches the iPad's hardware-keyboard input language (Caps Lock on Magic Keyboard / Ctrl+Space / Globe key), only the iPad's keymap changes. Parsec's iOS SDK only exposes
MESSAGE_KEYBOARDwith raw HID scancodes (no Unicode /MESSAGE_CHARpath), so the host keeps interpreting scancodes through whatever layout it had — the user sees wrong characters until they manually switch the host too.Approach: fire a host hotkey on every iPad language change so the host's input source switches in lock-step. Default is
Ctrl+Space(macOS built-in "select previous input source");Cmd+Space,Alt+Space,Alt+Shift(Windows convention) are also available. The user keeps the same two layouts in the same order on both ends.Mechanics:
LanguageSyncCoordinatorinstalls a 1×1 alpha-0 hiddenLanguageSyncTextFieldwith an emptyinputView(so no soft keyboard appears) and makes it first-responder.UITextInputMode.currentInputModeDidChangeNotificationonly fires when a text-input first-responder exists — the hidden field satisfies that.pressesBegan/Ended/Changed/Cancelledto the view controller without callingsuper, so hardware-keyboard scancodes continue to flow through the existingParsecViewController.pressesBeganpipeline unchanged. Same trick Moonlight uses inStreamView.m(their comment: "This will prevent the legacy UITextField from receiving the event").becomeFirstResponder()(insetKeyboardVisible(true)/showKeyboard) and reclaims it afterresignFirstResponder()insetKeyboardVisible(false).sendVirtualKeyboardInputalready releases the normal key async at +20 ms, so a synchronous modifier release would race ahead and break the chord on the host).Exposed under a new "Keyboard" section in
SettingsView:Sync layout with host— kill switch (default ON).Layout switch hotkey—Off/Ctrl + Space/Cmd + Space/Alt + Space/Alt + Shift.Regression checklist
touchesMovedstill sendssendMousePositionfor.indirectPointerwhencursorMode == .direct.GCMouse— untouched; that path lives inGameController.swift(Magic Keyboard trackpad does not enumerate asGCMouseon iPadOS, which is why this fix has to live inParsecViewController.swift).UIScrollViewpinch-to-zoom — untouched (minimumNumberOfTouches = 2, separate recognizer)..directtouches; tap recognizers already had[0, 2]/[0]filters.syncKeyboardLayout = false— coordinator never starts, file is dormant.Availability
Deployment target is iOS 14 (
OpenParsectarget inproject.pbxproj), so.indirectPointer(13.4+),allowedScrollTypesMask(13.4+),preciseLocation/precisePreviousLocation(9.1+),UITextInputMode.currentInputModeDidChangeNotification(4.2+), andprimaryLanguage(4.2+) are all available without#availablegates.CI
Both commits build green on my fork:
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