ci: add Linux capture build dependencies

.github/workflows/build.yml

@@ -103,12 +103,29 @@ jobs:
       - name: Verify Linux build image
         run: verify-crossdesk-build-image
 
+      - name: Ensure Wayland build dependencies
+        shell: bash
+        run: |
+          if pkg-config --exists dbus-1 libdrm libpipewire-0.3 libspa-0.2; then
+            exit 0
+          fi
+
+          apt-get update
+          apt-get install -y --no-install-recommends \
+            libdbus-1-dev \
+            libdrm-dev \
+            libpipewire-0.3-dev \
+            libspa-0.2-dev
+          rm -rf /var/lib/apt/lists/*
+
+          pkg-config --exists dbus-1 libdrm libpipewire-0.3 libspa-0.2
+
       - name: Build CrossDesk
         env:
           CUDA_PATH: /usr/local/cuda
           XMAKE_GLOBALDIR: /data
         run: |
-          xmake f --CROSSDESK_VERSION=${LEGAL_VERSION} --USE_CUDA=true --root -y
+          xmake f --CROSSDESK_VERSION=${LEGAL_VERSION} --USE_CUDA=true --USE_WAYLAND=true --root -y
           xmake b -vy --root crossdesk
 
       - name: Package
@@ -136,19 +153,20 @@ jobs:
     runs-on: ${{ matrix.runner }}
     env:
       MACOSX_DEPLOYMENT_TARGET: "14.0"
+      EXPECTED_MACOS_SDK: "26.5"
     strategy:
       matrix:
         include:
           - arch: x64
             binary_arch: x86_64
-            runner: macos-15-intel
+            runner: macos-26-intel
-            cache-key: intel-macos14
+            cache-key: intel-macos26-xcode26.6-min14
             out-dir: ./build/macosx/x86_64/release/crossdesk
             package_script: ./scripts/macosx/pkg_x64.sh
           - arch: arm64
             binary_arch: arm64
-            runner: macos-14
+            runner: macos-26
-            cache-key: arm-macos14
+            cache-key: arm-macos26-xcode26.6-min14
             out-dir: ./build/macosx/arm64/release/crossdesk
             package_script: ./scripts/macosx/pkg_arm64.sh
 
@@ -193,6 +211,17 @@ jobs:
           echo "BUILD_DATE=${BUILD_DATE}" >> $GITHUB_ENV
           echo "PATCH_NUMBER=${PATCH_NUMBER}" >> $GITHUB_ENV
 
+      - name: Select Xcode 26.6
+        shell: bash
+        run: |
+          sudo xcode-select -s /Applications/Xcode_26.6.app/Contents/Developer
+          xcodebuild -version
+          SDK_VERSION="$(xcrun --sdk macosx --show-sdk-version)"
+          if [[ "${SDK_VERSION}" != "${EXPECTED_MACOS_SDK}" ]]; then
+            echo "Unexpected macOS SDK: expected ${EXPECTED_MACOS_SDK}, got ${SDK_VERSION}" >&2
+            exit 1
+          fi
+
       - name: Cache xmake dependencies
         uses: actions/cache@v5
         with:
@@ -237,7 +266,7 @@ jobs:
             exit 1
           fi
 
-          ./scripts/macosx/verify_app.sh "${APP_PATH}" "${{ matrix.binary_arch }}"
+          ./scripts/macosx/verify_app.sh "${APP_PATH}" "${{ matrix.binary_arch }}" "${EXPECTED_MACOS_SDK}"
 
       - name: Upload build artifacts
         uses: actions/upload-artifact@v6
@@ -424,8 +453,7 @@ jobs:
   release:
     name: Publish Release
     if: startsWith(github.ref, 'refs/tags/v')
-    needs:
+    needs: [build-linux, build-macos, build-windows-x64]
-      [build-linux, build-macos, build-windows-x64]
     runs-on: ubuntu-latest
 
     steps:

docker/linux-build/Dockerfile

@@ -52,9 +52,11 @@ RUN apt-get update \
         libfreetype6-dev \
         libgl1-mesa-dev \
         libmount-dev \
+        libpipewire-0.3-dev \
         libpulse-dev \
         libreadline-dev \
         libsndio-dev \
+        libspa-0.2-dev \
         libssl-dev \
         libtool \
         libx11-dev \
@@ -134,7 +136,7 @@ COPY submodules/minirtc/thirdparty ./submodules/minirtc/thirdparty
 # CrossDesk's exact dependency graph. Source files are intentionally excluded
 # from the Docker context; source-only changes therefore reuse this layer.
 RUN xmake repo -u --root \
-    && xmake f -m release --USE_CUDA=true --root -y \
+    && xmake f -m release --USE_CUDA=true --USE_WAYLAND=true --root -y \
     && rm -rf /data/.xmake/cache /tmp/crossdesk-dependencies \
     && mkdir -p /workspace
 

docker/linux-build/README.md

@@ -1,7 +1,8 @@
 # CrossDesk Linux 构建镜像
 
 这个目录维护 CrossDesk 专用的 Ubuntu 22.04 构建环境。镜像包含 xmake、
-Rust、Linux 开发库以及根据项目 `xmake.lua` 提前编译好的依赖。
+Rust、Linux 开发库（包括 D-Bus、DRM、PipeWire 和 SPA）以及根据项目
+`xmake.lua` 提前编译好的依赖。
 
 ## 发布方式
 

docker/linux-build/verify-build-image.sh

@@ -30,7 +30,17 @@ rustc --version | grep -F "rustc ${EXPECTED_RUST_VERSION}" >/dev/null
 cargo --version >/dev/null
 cmake --version >/dev/null
 g++ --version >/dev/null
-pkg-config --exists xft
+for pkg_config_package in \
+    dbus-1 \
+    libdrm \
+    libpipewire-0.3 \
+    libspa-0.2 \
+    xft; do
+    if ! pkg-config --exists "${pkg_config_package}"; then
+        echo "Required pkg-config package is missing: ${pkg_config_package}" >&2
+        exit 1
+    fi
+done
 
 for package_path in \
     "s/slint" \

scripts/macosx/verify_app.sh

@@ -1,13 +1,14 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-if [[ $# -ne 2 ]]; then
+if [[ $# -lt 2 || $# -gt 3 ]]; then
-    echo "Usage: $0 <app-bundle> <expected-architecture>" >&2
+    echo "Usage: $0 <app-bundle> <expected-architecture> [expected-sdk-version]" >&2
     exit 2
 fi
 
 APP_BUNDLE="$1"
 EXPECTED_ARCH="$2"
+EXPECTED_SDK_VERSION="${3:-}"
 APP_EXECUTABLE="$APP_BUNDLE/Contents/MacOS/CrossDesk"
 FRAMEWORKS_DIR="$APP_BUNDLE/Contents/Frameworks"
 INFO_PLIST="$APP_BUNDLE/Contents/Info.plist"
@@ -94,6 +95,23 @@ if [[ -z "$BINARY_MIN_VERSION" || "$PLIST_MIN_VERSION" != "$BINARY_MIN_VERSION"
     exit 1
 fi
 
+if [[ -n "$EXPECTED_SDK_VERSION" ]]; then
+    verify_sdk_version() {
+        local macho="$1"
+        local actual_sdk=""
+        actual_sdk="$(otool -l "$macho" | awk '
+            $1 == "cmd" { build_version = ($2 == "LC_BUILD_VERSION"); next }
+            build_version && $1 == "sdk" { print $2; exit }')"
+        if [[ "$actual_sdk" != "$EXPECTED_SDK_VERSION" ]]; then
+            echo "Unexpected macOS SDK in $macho: expected $EXPECTED_SDK_VERSION, got ${actual_sdk:-unknown}" >&2
+            return 1
+        fi
+    }
+
+    verify_sdk_version "$APP_EXECUTABLE"
+    verify_sdk_version "$SLINT_LIBRARY"
+fi
+
 codesign --verify --deep --strict --verbose=2 "$APP_BUNDLE"
 
 echo "Verified $APP_BUNDLE ($EXPECTED_ARCH, macOS $BINARY_MIN_VERSION+)"

src/device_controller/keyboard/linux/keyboard_capturer_wayland.cpp

@@ -5,6 +5,9 @@
 #include <map>
 
 #if defined(CROSSDESK_HAS_WAYLAND_CAPTURER) && CROSSDESK_HAS_WAYLAND_CAPTURER
+#include <X11/Xlib.h>
+#include <X11/keysym.h>
+
 #include <dbus/dbus.h>
 #endif
 

src/device_controller/keyboard/mac/keyboard_capturer.cpp

@@ -1,5 +1,6 @@
 #include "keyboard_capturer.h"
 
+#include <cstdint>
 #include <unordered_map>
 
 #include "keyboard_converter.h"
@@ -10,6 +11,7 @@ namespace crossdesk {
 static OnKeyAction g_on_key_action = nullptr;
 static void* g_user_ptr = nullptr;
 static std::unordered_map<int, int> g_unmapped_keycode_to_vk;
+constexpr int64_t kCrossDeskInjectedKeyboardEvent = 0x43524f5353444553;
 
 static int VkCodeFromUnicode(UniChar ch) {
   if (ch >= 'a' && ch <= 'z') {
@@ -103,6 +105,10 @@ static int ResolveVkCodeFromMacEvent(CGEventRef event, CGKeyCode key_code,
 CGEventRef eventCallback(CGEventTapProxy proxy, CGEventType type,
                          CGEventRef event, void* userInfo) {
   (void)proxy;
+  if (CGEventGetIntegerValueField(event, kCGEventSourceUserData) ==
+      kCrossDeskInjectedKeyboardEvent) {
+    return event;
+  }
   if (!g_on_key_action) {
     return event;
   }
@@ -302,6 +308,8 @@ int KeyboardCapturer::SendKeyboardCommand(int key_code, bool is_down,
     }
 
     CGEventSetFlags(event, ToCGEventFlags(injected_flags));
+    CGEventSetIntegerValueField(event, kCGEventSourceUserData,
+                               kCrossDeskInjectedKeyboardEvent);
     CGEventPost(kCGHIDEventTap, event);
     CFRelease(event);
 
@@ -314,6 +322,8 @@ int KeyboardCapturer::SendKeyboardCommand(int key_code, bool is_down,
         LOG_ERROR("CGEventCreateKeyboardEvent failed for fn release");
         return -1;
       }
+      CGEventSetIntegerValueField(fn_release_event, kCGEventSourceUserData,
+                                 kCrossDeskInjectedKeyboardEvent);
       CGEventPost(kCGHIDEventTap, fn_release_event);
       CFRelease(fn_release_event);
     }

src/device_controller/keyboard/windows/keyboard_capturer.cpp

@@ -49,6 +49,9 @@ static bool PreferSideSpecificVkInjection(int key_code) {
 LRESULT CALLBACK KeyboardProc(int nCode, WPARAM wParam, LPARAM lParam) {
   if (nCode == HC_ACTION && g_on_key_action) {
     KBDLLHOOKSTRUCT* kbData = reinterpret_cast<KBDLLHOOKSTRUCT*>(lParam);
+    if ((kbData->flags & LLKHF_INJECTED) != 0) {
+      return CallNextHookEx(NULL, nCode, wParam, lParam);
+    }
     const int key_code = NormalizeModifierVkCode(kbData);
 
     if (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN) {

src/gui/application/application_state.h

@@ -1,6 +1,7 @@
 #ifndef CROSSDESK_GUI_APPLICATION_STATE_H_
 #define CROSSDESK_GUI_APPLICATION_STATE_H_
 
+#include <atomic>
 #include <chrono>
 #include <cstdint>
 #include <memory>
@@ -64,7 +65,7 @@ struct InteractionState {
   bool start_keyboard_capturer_ = false;
   bool show_cursor_ = false;
   bool keyboard_capturer_is_started_ = false;
-  bool keyboard_capturer_uses_sdl_events_ = false;
+  bool keyboard_capturer_uses_window_events_ = false;
   bool foucs_on_main_window_ = false;
   bool focus_on_stream_window_ = false;
   bool audio_capture_ = false;
@@ -119,8 +120,11 @@ struct StreamWindowState {
 };
 
 struct ServerWindowState {
-  bool need_to_create_server_window_ = false;
+  // Transport callbacks run outside the UI thread. Keep the two lifecycle
-  bool need_to_destroy_server_window_ = false;
+  // requests atomic so a disconnect cannot be lost while the Slint timer is
+  // deciding whether to create or destroy the controlled-side window.
+  std::atomic<bool> need_to_create_server_window_{false};
+  std::atomic<bool> need_to_destroy_server_window_{false};
   bool server_window_created_ = false;
   bool server_window_inited_ = false;
   int server_window_width_default_ = 250;

src/gui/application/gui_application.cpp

@@ -28,12 +28,19 @@
 #include "crossdesk_ui.h"
 #include "fa_solid_900.h"
 #include "localization.h"
+#include "platform.h"
 #if _WIN32
+#include <windows.h>
+
 #include "platform/tray/win_tray.h"
 #elif defined(__APPLE__)
 #include "platform/tray/mac_tray.h"
 #include "platform/window_drag.h"
 #elif defined(__linux__)
+#include <X11/Xatom.h>
+#include <X11/Xlib.h>
+#include <unistd.h>
+
 #include "platform/tray/linux_tray.h"
 #endif
 #include "rd_log.h"
@@ -44,6 +51,138 @@ namespace {
 
 using namespace std::chrono_literals;
 
+#if defined(__linux__) && !defined(__APPLE__)
+bool HasNonEmptyEnvironmentVariable(const char* name) {
+  const char* value = std::getenv(name);
+  return value != nullptr && value[0] != '\0';
+}
+
+class ScopedUnsetEnvironmentVariable {
+ public:
+  explicit ScopedUnsetEnvironmentVariable(const char* name) : name_(name) {
+    if (const char* value = std::getenv(name_)) {
+      original_value_ = value;
+    }
+    unsetenv(name_);
+  }
+
+  ~ScopedUnsetEnvironmentVariable() {
+    if (original_value_) {
+      setenv(name_, original_value_->c_str(), 1);
+    } else {
+      unsetenv(name_);
+    }
+  }
+
+  ScopedUnsetEnvironmentVariable(const ScopedUnsetEnvironmentVariable&) =
+      delete;
+  ScopedUnsetEnvironmentVariable& operator=(
+      const ScopedUnsetEnvironmentVariable&) = delete;
+
+ private:
+  const char* name_;
+  std::optional<std::string> original_value_;
+};
+
+::Window X11GetActiveWindow(Display* display) {
+  if (!display) {
+    return 0;
+  }
+
+  const ::Window root = DefaultRootWindow(display);
+  const Atom active_window_atom =
+      XInternAtom(display, "_NET_ACTIVE_WINDOW", True);
+  if (active_window_atom != None) {
+    Atom actual_type = None;
+    int actual_format = 0;
+    unsigned long item_count = 0;
+    unsigned long bytes_after = 0;
+    unsigned char* data = nullptr;
+    if (XGetWindowProperty(display, root, active_window_atom, 0, 1, False,
+                           XA_WINDOW, &actual_type, &actual_format, &item_count,
+                           &bytes_after, &data) == Success &&
+        actual_type == XA_WINDOW && actual_format == 32 && item_count == 1 &&
+        data) {
+      const ::Window active_window = *reinterpret_cast<const ::Window*>(data);
+      XFree(data);
+      return active_window;
+    }
+    if (data) {
+      XFree(data);
+    }
+  }
+
+  ::Window focused_window = 0;
+  int revert_to = RevertToNone;
+  XGetInputFocus(display, &focused_window, &revert_to);
+  return focused_window == None || focused_window == PointerRoot
+             ? 0
+             : focused_window;
+}
+
+std::optional<unsigned long> X11GetWindowProcessId(Display* display,
+                                                   ::Window x11_window) {
+  if (!display || !x11_window) {
+    return std::nullopt;
+  }
+
+  const Atom process_id_atom = XInternAtom(display, "_NET_WM_PID", True);
+  if (process_id_atom == None) {
+    return std::nullopt;
+  }
+
+  Atom actual_type = None;
+  int actual_format = 0;
+  unsigned long item_count = 0;
+  unsigned long bytes_after = 0;
+  unsigned char* data = nullptr;
+  const int status = XGetWindowProperty(
+      display, x11_window, process_id_atom, 0, 1, False, XA_CARDINAL,
+      &actual_type, &actual_format, &item_count, &bytes_after, &data);
+  if (status != Success || actual_type != XA_CARDINAL || actual_format != 32 ||
+      item_count != 1 || !data) {
+    if (data) {
+      XFree(data);
+    }
+    return std::nullopt;
+  }
+
+  const auto process_id = *reinterpret_cast<const unsigned long*>(data);
+  XFree(data);
+  return process_id;
+}
+
+bool X11WindowMatches(Display* display, ::Window x11_window,
+                      const slint::Window& slint_window) {
+  if (!display || !x11_window) {
+    return false;
+  }
+
+  XWindowAttributes attributes;
+  if (!XGetWindowAttributes(display, x11_window, &attributes)) {
+    return false;
+  }
+
+  int root_x = 0;
+  int root_y = 0;
+  ::Window child = 0;
+  if (!XTranslateCoordinates(display, x11_window, DefaultRootWindow(display), 0,
+                             0, &root_x, &root_y, &child)) {
+    return false;
+  }
+
+  const auto position = slint_window.position();
+  const auto size = slint_window.size();
+  constexpr int kGeometryTolerance = 4;
+  return std::abs(root_x - position.x) <= kGeometryTolerance &&
+         std::abs(root_y - position.y) <= kGeometryTolerance &&
+         std::abs(attributes.width - static_cast<int>(size.width)) <=
+             kGeometryTolerance &&
+         std::abs(attributes.height - static_cast<int>(size.height)) <=
+             kGeometryTolerance;
+}
+#endif
+
 #if _WIN32
 HICON LoadSlintTrayIcon() {
   HMODULE module = GetModuleHandleW(nullptr);
@@ -130,17 +269,15 @@ std::vector<ParsedReleaseNoteBlock> ParseReleaseNotesMarkdownForSlint(
   size_t line_start = 0;
   while (line_start < markdown.size()) {
     const size_t newline = markdown.find('\n', line_start);
-    const size_t line_end = newline == std::string_view::npos
+    const size_t line_end =
-                                ? markdown.size()
+        newline == std::string_view::npos ? markdown.size() : newline;
-                                : newline;
     std::string_view line = markdown.substr(line_start, line_end - line_start);
     if (!line.empty() && line.back() == '\r') {
       line.remove_suffix(1);
     }
 
-    if (std::all_of(line.begin(), line.end(), [](unsigned char ch) {
+    if (std::all_of(line.begin(), line.end(),
-          return std::isspace(ch) != 0;
+                    [](unsigned char ch) { return std::isspace(ch) != 0; })) {
-        })) {
       section_gap = !blocks.empty();
       if (newline == std::string_view::npos) {
         break;
@@ -167,11 +304,11 @@ std::vector<ParsedReleaseNoteBlock> ParseReleaseNotesMarkdownForSlint(
 
     const std::string block_markdown(line);
     ParsedReleaseNoteBlock block;
-    if (const auto parsed =
+    if (const auto parsed = slint::StyledText::from_markdown(block_markdown)) {
-            slint::StyledText::from_markdown(block_markdown)) {
       block.content = *parsed;
     } else {
-      LOG_WARN("Failed to parse a release-note Markdown block; using plain text");
+      LOG_WARN(
+          "Failed to parse a release-note Markdown block; using plain text");
       block.content = slint::StyledText::from_plain_text(block_markdown);
     }
     block.section_gap = section_gap;
@@ -496,6 +633,12 @@ float ServerWindowLogicalHeight(bool collapsed) {
 
 constexpr float kStreamWindowLogicalWidth = 1280.0f;
 constexpr float kStreamWindowLogicalHeight = 720.0f;
+constexpr float kWaylandTitlebarLogicalHeight = 32.0f;
+
+float StreamWindowLogicalHeight(bool custom_titlebar) {
+  return kStreamWindowLogicalHeight +
+         (custom_titlebar ? kWaylandTitlebarLogicalHeight : 0.0f);
+}
 
 SDL_DisplayID DisplayForSlintWindow(const slint::Window& window) {
   const float scale = std::max(window.scale_factor(), 0.01f);
@@ -681,6 +824,8 @@ struct GuiApplication::SlintUi {
   bool portable_service_dialog_initialized = false;
   std::string recent_model_signature;
   slint::Timer timer;
+  WindowDragState main_drag;
+  WindowDragState stream_drag;
   WindowDragState server_drag;
   int main_native_titlebar_attempts = 30;
   int stream_live_resize_configuration_attempts = 0;
@@ -696,7 +841,17 @@ struct GuiApplication::SlintUi {
   std::unique_ptr<MacTray> tray;
 #elif defined(__linux__)
   std::unique_ptr<LinuxTray> tray;
+  Display* x11_focus_display = nullptr;
+  std::chrono::steady_clock::time_point last_x11_activation_poll{};
 #endif
+
+  ~SlintUi() {
+#if defined(__linux__) && !defined(__APPLE__)
+    if (x11_focus_display) {
+      XCloseDisplay(x11_focus_display);
+    }
+#endif
+  }
 };
 
 GuiApplication::GuiApplication() = default;
@@ -791,6 +946,25 @@ bool GuiApplication::InitializeSDL() {
   if (!getenv("SDL_AUDIODRIVER")) {
     setenv("SDL_AUDIODRIVER", "pulseaudio", 0);
   }
+
+  // Standard Wayland top-level windows cannot choose an absolute screen
+  // position. Use the session's XWayland compatibility server for the GUI so
+  // auxiliary windows such as the controlled-side status window can be
+  // placed deterministically. Capture and input still detect the surrounding
+  // Wayland session through XDG_SESSION_TYPE and continue to use the portal.
+  const char* requested_video_driver = std::getenv("SDL_VIDEODRIVER");
+  const bool video_driver_allows_x11 =
+      requested_video_driver == nullptr || requested_video_driver[0] == '\0' ||
+      std::strcmp(requested_video_driver, "x11") == 0;
+  use_xwayland_gui_ = IsWaylandSession() &&
+                      HasNonEmptyEnvironmentVariable("DISPLAY") &&
+                      video_driver_allows_x11;
+  if (use_xwayland_gui_) {
+    setenv("SDL_VIDEODRIVER", "x11", 1);
+    LOG_INFO(
+        "Wayland session detected; using XWayland for positioned GUI "
+        "windows while retaining Wayland portal capture and input");
+  }
 #endif
   if (!SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO)) {
     LOG_ERROR("SDL initialization failed: {}", SDL_GetError());
@@ -815,10 +989,28 @@ void GuiApplication::InitializeModules() {
 }
 
 void GuiApplication::InitializeUi() {
+#if defined(__linux__) && !defined(__APPLE__)
+  // Winit prefers Wayland whenever WAYLAND_DISPLAY/WAYLAND_SOCKET is present.
+  // Hide them only while Slint selects its process-wide window backend, then
+  // restore the environment before the rest of the application starts.
+  std::optional<ScopedUnsetEnvironmentVariable> wayland_display_guard;
+  std::optional<ScopedUnsetEnvironmentVariable> wayland_socket_guard;
+  if (use_xwayland_gui_) {
+    wayland_display_guard.emplace("WAYLAND_DISPLAY");
+    wayland_socket_guard.emplace("WAYLAND_SOCKET");
+  }
+#endif
   ui_ = std::make_unique<SlintUi>();
+#if _WIN32
+  ui_->main->set_custom_titlebar(true);
+#elif defined(__linux__)
+  if (use_xwayland_gui_) {
+    ui_->main->set_custom_titlebar(true);
+    ui_->main->set_wayland_titlebar(true);
+  }
+#endif
   std::vector<ui::ReleaseNoteBlock> release_note_blocks;
-  for (const auto& parsed :
+  for (const auto& parsed : ParseReleaseNotesMarkdownForSlint(release_notes_)) {
-       ParseReleaseNotesMarkdownForSlint(release_notes_)) {
     ui::ReleaseNoteBlock block;
     block.content = parsed.content;
     block.section_gap = parsed.section_gap;
@@ -920,6 +1112,9 @@ void GuiApplication::InitializeUi() {
 
   if (ui_->capture_mode && ui_->capture_page == "stream") {
     ui_->stream.emplace(ui::StreamWindow::create());
+#if defined(__linux__)
+    (*ui_->stream)->set_custom_titlebar(use_xwayland_gui_);
+#endif
     RegisterFontAwesome((*ui_->stream)->window());
     (*ui_->stream)->set_tabs(ui_->tab_model);
     (*ui_->stream)->set_displays(ui_->display_model);
@@ -962,9 +1157,10 @@ void GuiApplication::InitializeUi() {
 #endif
     BindStreamCallbacks();
     (*ui_->stream)->show();
-    PositionWindowAtCenter((*ui_->stream)->window(), ui_->main->window(),
+    PositionWindowAtCenter(
-                           kStreamWindowLogicalWidth,
+        (*ui_->stream)->window(), ui_->main->window(),
-                           kStreamWindowLogicalHeight);
+        kStreamWindowLogicalWidth,
+        StreamWindowLogicalHeight((*ui_->stream)->get_custom_titlebar()));
     ui_->main->hide();
   } else if (ui_->capture_mode && ui_->capture_page == "server") {
     ui_->server.emplace(ui::ServerWindow::create());
@@ -1109,6 +1305,27 @@ void GuiApplication::BindMainCallbacks() {
     exit_ = true;
     return slint::CloseRequestResponse::HideWindow;
   });
+  main->on_main_title_drag([this](int phase, float x, float y) {
+    if (ui_) {
+      DragWindow(ui_->main, phase, x, y, ui_->main_drag);
+    }
+  });
+  main->on_minimize_main_window([this] {
+    if (ui_) {
+      ui_->main->window().set_minimized(true);
+    }
+  });
+  main->on_close_main_window([this] {
+    if (!ui_) {
+      return;
+    }
+    if (MinimizeMainWindowToTray()) {
+      ui_->main->hide();
+      return;
+    }
+    exit_ = true;
+    ui_->main->hide();
+  });
   main->on_copy_local_id([this] {
     if (!SDL_SetClipboardText(client_id_)) {
       LOG_WARN("Copy local id failed: {}", SDL_GetError());
@@ -1337,7 +1554,7 @@ void GuiApplication::BindStreamCallbacks() {
     return;
   }
   auto& stream = *ui_->stream;
-  stream->window().on_close_requested([this] {
+  auto close_stream_sessions = [this] {
     std::vector<std::string> ids;
     {
       std::shared_lock lock(remote_sessions_mutex_);
@@ -1348,8 +1565,35 @@ void GuiApplication::BindStreamCallbacks() {
     for (const auto& id : ids) {
       CloseStreamTab(id);
     }
+    if (ui_ && ui_->stream) {
+      (*ui_->stream)->hide();
+    }
+  };
+  stream->window().on_close_requested([close_stream_sessions] {
+    close_stream_sessions();
     return slint::CloseRequestResponse::HideWindow;
   });
+  stream->on_stream_title_drag([this](int phase, float x, float y) {
+    if (ui_ && ui_->stream) {
+      DragWindow(*ui_->stream, phase, x, y, ui_->stream_drag);
+    }
+  });
+  stream->on_minimize_stream_window([this] {
+    if (ui_ && ui_->stream) {
+      (*ui_->stream)->window().set_minimized(true);
+    }
+  });
+  stream->on_toggle_maximize_stream_window([this] {
+    if (!ui_ || !ui_->stream) {
+      return;
+    }
+    auto& stream = *ui_->stream;
+    auto& window = stream->window();
+    const bool maximize = !window.is_maximized();
+    stream->set_window_maximized(maximize);
+    window.set_maximized(maximize);
+  });
+  stream->on_close_stream_window(close_stream_sessions);
   stream->on_select_tab([this](int index) { SelectStreamTab(index); });
   stream->on_reorder_tab([this](int from, float drop_x, float tab_width) {
     ReorderStreamTab(from, drop_x, tab_width);
@@ -1484,6 +1728,8 @@ void GuiApplication::BindStreamCallbacks() {
                               bool control, bool alt, bool shift, bool meta) {
     SendKeyInput(std::string(text), pressed, control, alt, shift, meta);
   });
+  stream->on_keyboard_focus_changed(
+      [this](bool focused) { SetStreamKeyboardFocus(focused); });
 }
 
 void GuiApplication::BindServerCallbacks() {
@@ -1587,8 +1833,13 @@ void GuiApplication::Tick() {
   }
   HandleConnectionStatusChange();
   HandlePendingPresenceProbe();
-  HandleConnectionTimeouts();
+  HandlePresenceProbeTimeout();
   HandleWindowsServiceIntegration();
+#if defined(__linux__) && !defined(__APPLE__)
+  SyncXWaylandWindowActivation();
+#else
+  SyncStreamKeyboardFocus();
+#endif
   devices_.UpdateInteractions();
 
   UpdateLocalization();
@@ -1782,9 +2033,9 @@ void GuiApplication::SyncMainWindow() {
 #if (((defined(_WIN32) || defined(__linux__)) && !defined(__aarch64__) && \
       !defined(__arm__) && USE_CUDA) ||                                   \
      defined(__APPLE__))
-  ui_->main->set_hardware_codec_visible(true);
+  ui_->main->set_hardware_codec_available(true);
 #else
-  ui_->main->set_hardware_codec_visible(false);
+  ui_->main->set_hardware_codec_available(false);
 #endif
 
   if (show_offline_warning_window_) {
@@ -1829,6 +2080,11 @@ void GuiApplication::SyncMainWindow() {
     }
     model.push_back(std::move(item));
   }
+  // LoadThumbnail already orders connections by last update time. Keep that
+  // order within each presence group while placing online devices first.
+  std::stable_partition(
+      model.begin(), model.end(),
+      [](const ui::RecentConnection& connection) { return connection.online; });
   ui_->recent_model->set_vector(std::move(model));
 }
 
@@ -1960,6 +2216,77 @@ void GuiApplication::SyncPlatformDialogs() {
 #endif
 }
 
+#if defined(__linux__) && !defined(__APPLE__)
+void GuiApplication::SyncXWaylandWindowActivation() {
+  if (!ui_ || !use_xwayland_gui_) {
+    return;
+  }
+
+  const auto now = std::chrono::steady_clock::now();
+  if (now - ui_->last_x11_activation_poll < 100ms) {
+    return;
+  }
+  ui_->last_x11_activation_poll = now;
+
+  if (!ui_->x11_focus_display) {
+    ui_->x11_focus_display = XOpenDisplay(nullptr);
+  }
+  Display* display = ui_->x11_focus_display;
+  const ::Window active_window = X11GetActiveWindow(display);
+  if (!active_window) {
+    SetStreamKeyboardFocus(false);
+    return;
+  }
+
+  if (const auto process_id = X11GetWindowProcessId(display, active_window);
+      process_id && *process_id != static_cast<unsigned long>(getpid())) {
+    ui_->main->set_window_active(false);
+    if (ui_->stream) {
+      (*ui_->stream)->set_window_active(false);
+    }
+    SetStreamKeyboardFocus(false);
+    return;
+  }
+
+  ui_->main->set_window_active(
+      X11WindowMatches(display, active_window, ui_->main->window()));
+  if (ui_->stream) {
+    const bool stream_active =
+        X11WindowMatches(display, active_window, (*ui_->stream)->window());
+    (*ui_->stream)->set_window_active(stream_active);
+    SetStreamKeyboardFocus(stream_active);
+  } else {
+    SetStreamKeyboardFocus(false);
+  }
+}
+#endif
+
+void GuiApplication::SetStreamKeyboardFocus(bool focused) {
+  if (focus_on_stream_window_ == focused) {
+    return;
+  }
+
+  focus_on_stream_window_ = focused;
+  if (!focused) {
+    keyboard_.ForceReleasePressedKeys();
+  }
+}
+
+void GuiApplication::SyncStreamKeyboardFocus() {
+  if (!ui_ || !ui_->stream || !(*ui_->stream)->window().is_visible()) {
+    SetStreamKeyboardFocus(false);
+    return;
+  }
+
+#if _WIN32
+  const HWND stream_hwnd = (*ui_->stream)->window().win32_hwnd();
+  SetStreamKeyboardFocus(stream_hwnd != nullptr &&
+                         GetForegroundWindow() == stream_hwnd);
+#elif defined(__APPLE__)
+  SetStreamKeyboardFocus(IsStreamWindowActive());
+#endif
+}
+
 void GuiApplication::SyncStreamWindow() {
   bool has_sessions = false;
   {
@@ -1968,6 +2295,9 @@ void GuiApplication::SyncStreamWindow() {
   }
   if (need_to_create_stream_window_ && !ui_->stream) {
     ui_->stream.emplace(ui::StreamWindow::create());
+#if defined(__linux__)
+    (*ui_->stream)->set_custom_titlebar(use_xwayland_gui_);
+#endif
     RegisterFontAwesome((*ui_->stream)->window());
     // Slint globals belong to a component tree. Force the next localization
     // pass to initialize the newly-created, independent stream window tree.
@@ -1991,6 +2321,7 @@ void GuiApplication::SyncStreamWindow() {
   if (!ui_->stream) {
     return;
   }
+  (*ui_->stream)->set_window_maximized((*ui_->stream)->window().is_maximized());
   (*ui_->stream)->set_srtp_enabled(enable_srtp_);
 #if defined(__APPLE__)
   if (ui_->stream_live_resize_configuration_attempts > 0) {
@@ -2002,15 +2333,17 @@ void GuiApplication::SyncStreamWindow() {
   }
 #endif
   if (ui_->stream_initial_position_attempts > 0) {
-    if (PositionWindowAtCenter((*ui_->stream)->window(), ui_->main->window(),
+    if (PositionWindowAtCenter(
-                               kStreamWindowLogicalWidth,
+            (*ui_->stream)->window(), ui_->main->window(),
-                               kStreamWindowLogicalHeight)) {
+            kStreamWindowLogicalWidth,
+            StreamWindowLogicalHeight((*ui_->stream)->get_custom_titlebar()))) {
       --ui_->stream_initial_position_attempts;
     } else {
       ui_->stream_initial_position_attempts = 0;
     }
   }
   if (!has_sessions) {
+    SetStreamKeyboardFocus(false);
 #if defined(__APPLE__)
     SetStreamWindowFullscreen(false);
 #endif
@@ -2238,7 +2571,22 @@ void GuiApplication::SyncStreamWindow() {
 }
 
 void GuiApplication::SyncServerWindow() {
-  if (need_to_create_server_window_ && !ui_->server) {
+  // The connection map is authoritative. Lifecycle flags record callback
+  // intent, but callbacks for different controllers can cross each other, so
+  // the final decision must reflect the current connected-controller set.
+  need_to_create_server_window_.exchange(false, std::memory_order_acq_rel);
+  need_to_destroy_server_window_.exchange(false, std::memory_order_acq_rel);
+  bool has_connected_controller = false;
+  {
+    std::shared_lock lock(connection_status_mutex_);
+    has_connected_controller =
+        std::any_of(connection_status_.begin(), connection_status_.end(),
+                    [](const auto& entry) {
+                      return entry.second == ConnectionStatus::Connected;
+                    });
+  }
+
+  if (has_connected_controller && !ui_->server) {
     ui_->server.emplace(ui::ServerWindow::create());
     RegisterFontAwesome((*ui_->server)->window());
     (*ui_->server)->set_controllers(ui_->controller_model);
@@ -2258,15 +2606,13 @@ void GuiApplication::SyncServerWindow() {
     ui_->server_initial_position_attempts = 2;
     server_window_created_ = true;
     server_window_inited_ = true;
-    need_to_create_server_window_ = false;
   }
-  if (need_to_destroy_server_window_ && ui_->server) {
+  if (!has_connected_controller && ui_->server) {
     (*ui_->server)->hide();
     ui_->server.reset();
     server_window_created_ = false;
     server_window_inited_ = false;
     ui_->server_initial_position_attempts = 0;
-    need_to_destroy_server_window_ = false;
   }
   if (!ui_->server) {
     return;
@@ -2479,14 +2825,25 @@ void GuiApplication::SelectStreamTab(int index) {
   if (!ui_ || index < 0 || index >= static_cast<int>(ui_->tab_ids.size())) {
     return;
   }
-  focused_remote_id_ = ui_->tab_ids[index];
+  const std::string selected_remote_id = ui_->tab_ids[index];
-  controlled_remote_id_ = focused_remote_id_;
+  if (!controlled_remote_id_.empty() &&
+      controlled_remote_id_ != selected_remote_id) {
+    keyboard_.ForceReleasePressedKeys();
+  }
+  focused_remote_id_ = selected_remote_id;
+  controlled_remote_id_ = selected_remote_id;
   std::shared_lock lock(remote_sessions_mutex_);
   for (auto& [id, props] : remote_sessions_) {
     if (props) {
       props->tab_selected_ = id == focused_remote_id_;
     }
   }
+  const auto selected = remote_sessions_.find(selected_remote_id);
+  start_keyboard_capturer_ = selected != remote_sessions_.end() &&
+                             selected->second &&
+                             selected->second->control_mouse_ &&
+                             selected->second->connection_status_.load() ==
+                                 ConnectionStatus::Connected;
 }
 
 void GuiApplication::ReorderStreamTab(int from, float drop_x, float tab_width) {
@@ -2561,10 +2918,14 @@ void GuiApplication::SendPointerInput(int button, int kind, float x, float y) {
   const auto size = (*ui_->stream)->window().size();
   const float scale = (*ui_->stream)->window().scale_factor();
   const float available_width = size.width / scale;
+  const float titlebar_height =
+      !fullscreen_button_pressed_ && (*ui_->stream)->get_custom_titlebar()
+          ? kWaylandTitlebarLogicalHeight
+          : 0.0f;
   const float available_height =
-      size.height / scale - (fullscreen_button_pressed_
+      size.height / scale - titlebar_height -
-                                 ? 0.0f
+      (fullscreen_button_pressed_ ? 0.0f
-                                 : (ui_->tab_ids.size() > 1 ? 30.0f : 0.0f));
+                                  : (ui_->tab_ids.size() > 1 ? 30.0f : 0.0f));
   float render_width = available_width;
   float render_height = available_height;
   float offset_x = 0;
@@ -2632,10 +2993,14 @@ void GuiApplication::SendScrollInput(float delta_x, float delta_y, float x,
   const auto size = (*ui_->stream)->window().size();
   const float scale = (*ui_->stream)->window().scale_factor();
   const float width = size.width / scale;
+  const float titlebar_height =
+      !fullscreen_button_pressed_ && (*ui_->stream)->get_custom_titlebar()
+          ? kWaylandTitlebarLogicalHeight
+          : 0.0f;
   const float height =
-      size.height / scale - (fullscreen_button_pressed_
+      size.height / scale - titlebar_height -
-                                 ? 0.0f
+      (fullscreen_button_pressed_ ? 0.0f
-                                 : (ui_->tab_ids.size() > 1 ? 30.0f : 0.0f));
+                                  : (ui_->tab_ids.size() > 1 ? 30.0f : 0.0f));
   if (width <= 0 || height <= 0) {
     return;
   }
@@ -2666,10 +3031,22 @@ void GuiApplication::SendKeyInput(const std::string& text, bool pressed,
   (void)alt;
   (void)shift;
   (void)meta;
-  if (auto props = SelectedSession()) {
+  auto props = SelectedSession();
-    controlled_remote_id_ = props->remote_id_;
+  if (!props || !props->peer_ || !props->control_mouse_ ||
-    focused_remote_id_ = props->remote_id_;
+      props->connection_status_.load() != ConnectionStatus::Connected) {
+    return;
   }
+
+  controlled_remote_id_ = props->remote_id_;
+  focused_remote_id_ = props->remote_id_;
+
+  // Native hooks see the same physical key before Slint does. When a native
+  // hook is active, forwarding the FocusScope callback as well would duplicate
+  // the event on platforms whose hook does not consume the local key.
+  if (keyboard_capturer_is_started_ && !keyboard_capturer_uses_window_events_) {
+    return;
+  }
+
   const int virtual_key = SlintKeyToWindowsVk(text);
   if (virtual_key >= 0) {
     keyboard_.SendKeyCommand(virtual_key, pressed);

src/gui/application/gui_application.h

@@ -35,7 +35,12 @@ private:
   void SyncConnectionDialog();
   void SyncPlatformDialogs();
   void SyncStreamWindow();
+  void SyncStreamKeyboardFocus();
+  void SetStreamKeyboardFocus(bool focused);
   void SyncServerWindow();
+#if defined(__linux__) && !defined(__APPLE__)
+  void SyncXWaylandWindowActivation();
+#endif
   void UpdateLocalization();
   void ResetSettingsUi();
   void SaveSettingsFromUi();
@@ -59,6 +64,9 @@ private:
   bool OpenUrl(const std::string &url);
 
   std::unique_ptr<SlintUi> ui_;
+#if defined(__linux__) && !defined(__APPLE__)
+  bool use_xwayland_gui_ = false;
+#endif
 };
 
 } // namespace crossdesk

src/gui/application/sdl_event_dispatch.cpp

@@ -200,7 +200,8 @@ void GuiApplication::ProcessSdlEvent(const SDL_Event &event) {
 
   case SDL_EVENT_KEY_DOWN:
   case SDL_EVENT_KEY_UP:
-    if (keyboard_capturer_is_started_ && keyboard_capturer_uses_sdl_events_ &&
+    if (keyboard_capturer_is_started_ &&
+        keyboard_capturer_uses_window_events_ &&
         focus_on_stream_window_ && stream_window_ &&
         SDL_GetWindowID(stream_window_) == event.key.windowID) {
       ProcessKeyboardEvent(event);

src/gui/application/sdl_events.cpp

@@ -220,10 +220,8 @@ int GuiApplication::ProcessKeyboardEvent(const SDL_Event &event) {
     return -1;
   }
 
-  if (event.type == SDL_EVENT_KEY_DOWN && event.key.repeat) {
+  // SDL represents key auto-repeat as additional key-down events. Forward
-    return 0;
+  // them so the fallback path has the same long-press behavior as native hooks.
-  }
-
   const int key_code = TranslateSdlKeyboardEventToVk(event.key);
   if (key_code < 0) {
     return 0;
@@ -412,4 +410,4 @@ int GuiApplication::ProcessMouseEvent(const SDL_Event &event) {
   return 0;
 }
 
-} // namespace crossdesk
+} // namespace crossdesk

src/gui/features/devices/session_device_manager.cpp

@@ -228,27 +228,27 @@ int SessionDeviceManager::StopMouseController() {
 }
 
 int SessionDeviceManager::StartKeyboardCapturer() {
-  owner_.keyboard_capturer_uses_sdl_events_ = false;
+  owner_.keyboard_capturer_uses_window_events_ = false;
 
 #ifdef __APPLE__
   if (!owner_.EnsureMacAccessibilityPermission()) {
-    owner_.keyboard_capturer_uses_sdl_events_ = true;
+    owner_.keyboard_capturer_uses_window_events_ = true;
     return 0;
   }
 #endif
 
 #if defined(__linux__) && !defined(__APPLE__)
   if (IsWaylandSession()) {
-    owner_.keyboard_capturer_uses_sdl_events_ = true;
+    owner_.keyboard_capturer_uses_window_events_ = true;
-    LOG_INFO("Start keyboard capturer with SDL Wayland backend");
+    LOG_INFO("Start keyboard capturer with Slint Wayland backend");
     return 0;
   }
 #endif
 
   if (!keyboard_capturer_) {
-    owner_.keyboard_capturer_uses_sdl_events_ = true;
+    owner_.keyboard_capturer_uses_window_events_ = true;
     LOG_WARN(
-        "keyboard capturer is nullptr, falling back to SDL keyboard events");
+        "keyboard capturer is nullptr, falling back to Slint keyboard events");
     return 0;
   }
 
@@ -263,9 +263,9 @@ int SessionDeviceManager::StartKeyboardCapturer() {
       },
       &owner_);
   if (hook_ret != 0) {
-    owner_.keyboard_capturer_uses_sdl_events_ = true;
+    owner_.keyboard_capturer_uses_window_events_ = true;
     LOG_WARN(
-        "Start keyboard capturer failed, falling back to SDL keyboard events");
+        "Start keyboard capturer failed, falling back to Slint keyboard events");
   } else {
     LOG_INFO("Start keyboard capturer with native hook");
   }
@@ -273,9 +273,9 @@ int SessionDeviceManager::StartKeyboardCapturer() {
 }
 
 int SessionDeviceManager::StopKeyboardCapturer() {
-  if (owner_.keyboard_capturer_uses_sdl_events_) {
+  if (owner_.keyboard_capturer_uses_window_events_) {
-    owner_.keyboard_capturer_uses_sdl_events_ = false;
+    owner_.keyboard_capturer_uses_window_events_ = false;
-    LOG_INFO("Stop keyboard capturer with SDL keyboard backend");
+    LOG_INFO("Stop keyboard capturer with Slint keyboard backend");
     return 0;
   }
 

src/gui/platform/window_drag.h

@@ -16,6 +16,10 @@ bool HideDisabledMainWindowZoomButton();
 // fullscreen action with an immediate, single-window fullscreen transition.
 bool ConfigureStreamWindowLiveResize();
 
+// Returns whether the configured stream window is currently the active AppKit
+// key window.
+bool IsStreamWindowActive();
+
 // Enters or leaves the stream window's animation-free fullscreen mode.
 bool SetStreamWindowFullscreen(bool fullscreen);
 bool IsStreamWindowFullscreen();

src/gui/platform/window_drag_mac.mm

@@ -146,6 +146,13 @@ bool ConfigureStreamWindowLiveResize() {
   }
 }
 
+bool IsStreamWindowActive() {
+  @autoreleasepool {
+    return stream_window != nil && [NSApp isActive] &&
+           [stream_window isKeyWindow];
+  }
+}
+
 bool SetStreamWindowFullscreen(bool fullscreen) {
   @autoreleasepool {
     if (stream_window == nil || stream_fullscreen == fullscreen) {

src/gui/runtime/connection_runtime.cpp

@@ -1,5 +1,3 @@
-#include "runtime/gui_runtime.h"
-
 #include <algorithm>
 #include <chrono>
 #include <cstring>
@@ -11,18 +9,15 @@
 #include <vector>
 
 #include "localization.h"
+#include "platform.h"
 #include "rd_log.h"
+#include "runtime/gui_runtime.h"
 
 namespace crossdesk {
 
 namespace {
 constexpr auto kPresenceProbeTimeout = std::chrono::seconds(5);
-constexpr auto kConnectionAttemptTimeout = std::chrono::seconds(20);
+}  // namespace
-bool IsConnectionAttemptPending(ConnectionStatus status) {
-  return status == ConnectionStatus::Connecting ||
-         status == ConnectionStatus::Gathering;
-}
-} // namespace
 
 void GuiRuntime::HandleConnectionStatusChange() {
   if (signal_connected_ && peer_ && need_to_send_recent_connections_) {
@@ -31,7 +26,7 @@ void GuiRuntime::HandleConnectionStatusChange() {
       j["type"] = "recent_connections_presence";
       j["user_id"] = client_id_;
       j["devices"] = nlohmann::json::array();
-      for (const auto &id : recent_connection_ids_) {
+      for (const auto& id : recent_connection_ids_) {
         std::string pure_id = id;
         size_t pos_y = pure_id.find('Y');
         size_t pos_n = pure_id.find('N');
@@ -95,7 +90,7 @@ void GuiRuntime::HandlePendingPresenceProbe() {
   show_offline_warning_window_ = true;
 }
 
-void GuiRuntime::HandleConnectionTimeouts() {
+void GuiRuntime::HandlePresenceProbeTimeout() {
   const auto now = std::chrono::steady_clock::now();
 
   bool presence_probe_timed_out = false;
@@ -121,48 +116,67 @@ void GuiRuntime::HandleConnectionTimeouts() {
     show_offline_warning_window_ = true;
     LOG_WARN("Presence probe timed out for [{}]", presence_remote_id);
   }
+}
 
-  bool rejoin_state_changed = false;
+void GuiRuntime::HandleServerControllerDisconnected(
-  for (auto &[_, props] : remote_sessions_) {
+    const std::string& remote_id, const char* reason) {
-    if (!props || !props->connection_attempt_active_.load()) {
+  keyboard_.ReleaseRemotePressedKeys(remote_id, reason);
-      continue;
-    }
 
-    const ConnectionStatus status = props->connection_status_.load();
+  bool has_connected_controller = false;
-    if (!IsConnectionAttemptPending(status)) {
+  bool has_web_controller = false;
-      props->connection_attempt_active_.store(false);
+  std::string remaining_controller_id;
-      continue;
+  {
-    }
+    std::unique_lock lock(connection_status_mutex_);
-
+    connection_status_.erase(remote_id);
-    if (now - props->connection_attempt_started_at_ <
+    connection_host_names_.erase(remote_id);
-        kConnectionAttemptTimeout) {
+    for (const auto& [id, status] : connection_status_) {
-      continue;
+      if (status != ConnectionStatus::Connected) {
-    }
+        continue;
-
+      }
-    LOG_WARN("Connection to [{}] timed out, status={}", props->remote_id_,
+      has_connected_controller = true;
-             static_cast<int>(status));
+      has_web_controller =
-    props->connection_attempt_active_.store(false);
+          has_web_controller || id.find("web") != std::string::npos;
-    props->connection_established_ = false;
+      if (remaining_controller_id.empty()) {
-    props->rejoin_ = false;
+        remaining_controller_id = id;
-    props->connection_status_.store(ConnectionStatus::Failed);
-    focused_remote_id_ = props->remote_id_;
-    show_connection_status_window_ = true;
-    rejoin_state_changed = true;
-  }
-
-  if (rejoin_state_changed) {
-    need_to_rejoin_ = false;
-    for (const auto &[_, props] : remote_sessions_) {
-      if (props && props->rejoin_) {
-        need_to_rejoin_ = true;
-        break;
       }
     }
   }
+  show_cursor_ = has_web_controller;
+  if (has_connected_controller) {
+    remote_client_id_ = remaining_controller_id;
+    return;
+  }
+
+  need_to_create_server_window_.store(false, std::memory_order_release);
+  need_to_destroy_server_window_.store(true, std::memory_order_release);
+  is_server_mode_ = false;
+#if defined(__linux__) && !defined(__APPLE__)
+  if (IsWaylandSession()) {
+    // Keep Wayland capture session warm to avoid black screen on subsequent
+    // reconnects.
+    start_screen_capturer_ = true;
+    LOG_INFO(
+        "Keeping Wayland screen capturer running after disconnect to "
+        "preserve reconnect stability");
+  } else {
+    start_screen_capturer_ = false;
+  }
+#else
+  start_screen_capturer_ = false;
+#endif
+  start_speaker_capturer_ = false;
+  start_mouse_controller_ = false;
+  start_keyboard_capturer_ = false;
+  remote_client_id_.clear();
+  if (audio_capture_) {
+    devices_.StopSpeakerCapturer();
+    audio_capture_ = false;
+  }
+  devices_.ResetToInitialDisplay();
 }
 
-int GuiRuntime::RequestSingleDevicePresence(const std::string &remote_id,
+int GuiRuntime::RequestSingleDevicePresence(const std::string& remote_id,
-                                            const char *password,
+                                            const char* password,
                                             bool remember_password) {
   if (!signal_connected_ || !peer_) {
     return -1;
@@ -221,7 +235,7 @@ void GuiRuntime::CloseRemoteSession(std::shared_ptr<RemoteSession> props) {
     std::thread save_thread([buffer_copy, video_width, video_height, remote_id,
                              remote_host_name, password,
                              thumbnail = thumbnail_]() {
-      thumbnail->SaveToThumbnail((char *)buffer_copy.data(), video_width,
+      thumbnail->SaveToThumbnail((char*)buffer_copy.data(), video_width,
                                  video_height, remote_id, remote_host_name,
                                  password);
     });
@@ -255,7 +269,7 @@ void GuiRuntime::CloseAllRemoteSessions() {
 
   {
     // std::shared_lock lock(remote_sessions_mutex_);
-    for (auto &it : remote_sessions_) {
+    for (auto& it : remote_sessions_) {
       auto props = it.second;
       CloseRemoteSession(props);
     }
@@ -279,7 +293,7 @@ void GuiRuntime::WaitForThumbnailSaveTasks() {
     return;
   }
 
-  for (auto &thread : threads_to_join) {
+  for (auto& thread : threads_to_join) {
     if (thread.joinable()) {
       thread.join();
     }
@@ -300,9 +314,8 @@ void GuiRuntime::ResetRemoteSessionResources(
   }
 }
 
-std::shared_ptr<GuiRuntime::RemoteSession>
+std::shared_ptr<GuiRuntime::RemoteSession> GuiRuntime::FindRemoteSession(
-GuiRuntime::FindRemoteSession(
+    const std::string& remote_id) {
-    const std::string &remote_id) {
   if (remote_id.empty()) {
     return nullptr;
   }
@@ -315,8 +328,7 @@ GuiRuntime::FindRemoteSession(
   return it->second;
 }
 
-
+int GuiRuntime::ConnectTo(const std::string& remote_id, const char* password,
-int GuiRuntime::ConnectTo(const std::string &remote_id, const char *password,
                           bool remember_password, bool bypass_presence_check) {
   if (!bypass_presence_check && !device_presence_cache_.IsOnline(remote_id)) {
     int ret =
@@ -336,19 +348,17 @@ int GuiRuntime::ConnectTo(const std::string &remote_id, const char *password,
   focused_remote_id_ = remote_id;
 
   // std::shared_lock shared_lock(remote_sessions_mutex_);
-  bool exists =
+  bool exists = (remote_sessions_.find(remote_id) != remote_sessions_.end());
-      (remote_sessions_.find(remote_id) != remote_sessions_.end());
   // shared_lock.unlock();
 
   if (!exists) {
-    PeerPtr *peer_to_init = nullptr;
+    PeerPtr* peer_to_init = nullptr;
     std::string local_id;
 
     {
       // std::unique_lock unique_lock(remote_sessions_mutex_);
       if (remote_sessions_.find(remote_id) == remote_sessions_.end()) {
-        remote_sessions_[remote_id] =
+        remote_sessions_[remote_id] = std::make_shared<RemoteSession>();
-            std::make_shared<RemoteSession>();
         auto props = remote_sessions_[remote_id];
         props->local_id_ = "C-" + std::string(client_id_);
         props->remote_id_ = remote_id;
@@ -371,7 +381,7 @@ int GuiRuntime::ConnectTo(const std::string &remote_id, const char *password,
           return -1;
         }
 
-        for (const auto &display_info : devices_.display_info_list()) {
+        for (const auto& display_info : devices_.display_info_list()) {
           AddVideoStream(props->peer_, display_info.name.c_str());
         }
         AddAudioStream(props->peer_, props->audio_label_.c_str());
@@ -402,8 +412,6 @@ int GuiRuntime::ConnectTo(const std::string &remote_id, const char *password,
   auto props = remote_sessions_[remote_id];
   if (!props->connection_established_) {
     props->connection_status_.store(ConnectionStatus::Connecting);
-    props->connection_attempt_active_.store(true);
-    props->connection_attempt_started_at_ = std::chrono::steady_clock::now();
     show_connection_status_window_ = true;
 
     props->remember_password_ = remember_password;
@@ -429,4 +437,4 @@ int GuiRuntime::ConnectTo(const std::string &remote_id, const char *password,
 
   return 0;
 }
-} // namespace crossdesk
+}  // namespace crossdesk

src/gui/runtime/gui_runtime.h

@@ -8,16 +8,16 @@
 #include "features/devices/session_device_manager.h"
 #include "features/file_transfer/file_transfer_manager.h"
 #include "features/input/keyboard_controller.h"
+#include "features/settings/settings_manager.h"
 #include "runtime/gui_state.h"
 #include "runtime/peer_event_handler.h"
-#include "features/settings/settings_manager.h"
 
 namespace crossdesk {
 
 // Shared GUI runtime. It owns subsystem controllers and cross-cutting session
 // state, but no window lifecycle, ImGui view, or transport callback methods.
 class GuiRuntime : protected gui_detail::GuiState {
-protected:
+ protected:
   using FileTransferState = gui_detail::FileTransferState;
   using RemoteSession = gui_detail::RemoteSession;
 
@@ -32,35 +32,35 @@ protected:
   GuiRuntime();
   ~GuiRuntime();
 
-  static void SdlCaptureAudioIn(void *userdata, Uint8 *stream, int len);
+  static void SdlCaptureAudioIn(void* userdata, Uint8* stream, int len);
-  static void SdlCaptureAudioOut(void *userdata, Uint8 *stream, int len);
+  static void SdlCaptureAudioOut(void* userdata, Uint8* stream, int len);
 
   int CreateConnectionPeer();
-  int ConnectTo(const std::string &remote_id, const char *password,
+  int ConnectTo(const std::string& remote_id, const char* password,
                 bool remember_password, bool bypass_presence_check = false);
-  int RequestSingleDevicePresence(const std::string &remote_id,
+  int RequestSingleDevicePresence(const std::string& remote_id,
-                                  const char *password, bool remember_password);
+                                  const char* password, bool remember_password);
 
   void UpdateLabels();
   void HandleRecentConnections();
   void HandleConnectionStatusChange();
   void HandlePendingPresenceProbe();
-  void HandleConnectionTimeouts();
+  void HandlePresenceProbeTimeout();
+  void HandleServerControllerDisconnected(const std::string& remote_id,
+                                          const char* reason);
   void HandleWindowsServiceIntegration();
 
   void CloseRemoteSession(std::shared_ptr<RemoteSession> props);
   void CloseAllRemoteSessions();
-  void ResetRemoteSessionResources(
+  void ResetRemoteSessionResources(std::shared_ptr<RemoteSession> props);
-      std::shared_ptr<RemoteSession> props);
   void WaitForThumbnailSaveTasks();
-  std::shared_ptr<RemoteSession>
+  std::shared_ptr<RemoteSession> FindRemoteSession(
-  FindRemoteSession(const std::string &remote_id);
+      const std::string& remote_id);
 
-  void ResetRemoteServiceStatus(RemoteSession &props);
+  void ResetRemoteServiceStatus(RemoteSession& props);
-  void ApplyRemoteServiceStatus(RemoteSession &props,
+  void ApplyRemoteServiceStatus(RemoteSession& props,
-                                const ServiceStatus &status);
+                                const ServiceStatus& status);
-  RemoteUnlockState
+  RemoteUnlockState GetRemoteUnlockState(const RemoteSession& props) const;
-  GetRemoteUnlockState(const RemoteSession &props) const;
 #if _WIN32
   void ResetLocalWindowsServiceState(bool clear_pending_sas);
 #endif
@@ -82,7 +82,7 @@ protected:
   KeyboardController keyboard_;
   PeerEventHandler peer_events_;
 
-private:
+ private:
   friend class ClipboardController;
   friend class SessionDeviceManager;
   friend class FileTransferManager;
@@ -91,6 +91,6 @@ private:
   friend class PeerEventHandler;
 };
 
-} // namespace crossdesk
+}  // namespace crossdesk
 
-#endif // CROSSDESK_GUI_RUNTIME_H_
+#endif  // CROSSDESK_GUI_RUNTIME_H_

src/gui/runtime/peer_event_handler.cpp

@@ -26,12 +26,12 @@
 
 namespace crossdesk {
 
-PeerEventHandler::PeerEventHandler(GuiRuntime &owner) : owner_(owner) {}
+PeerEventHandler::PeerEventHandler(GuiRuntime& owner) : owner_(owner) {}
 
-void PeerEventHandler::OnSignalMessage(const char *message, size_t size,
+void PeerEventHandler::OnSignalMessage(const char* message, size_t size,
-                                       void *user_data) {
+                                       void* user_data) {
-  auto *handler = static_cast<PeerEventHandler *>(user_data);
+  auto* handler = static_cast<PeerEventHandler*>(user_data);
-  GuiRuntime *runtime = handler ? &handler->owner_ : nullptr;
+  GuiRuntime* runtime = handler ? &handler->owner_ : nullptr;
   if (!runtime || !message || size == 0) {
     return;
   }
@@ -43,7 +43,7 @@ void PeerEventHandler::OnSignalMessage(const char *message, size_t size,
   std::string type = j["type"].get<std::string>();
   if (type == "presence") {
     if (j.contains("devices") && j["devices"].is_array()) {
-      for (auto &dev : j["devices"]) {
+      for (auto& dev : j["devices"]) {
         if (!dev.is_object()) {
           continue;
         }
@@ -88,11 +88,10 @@ void PeerEventHandler::OnSignalMessage(const char *message, size_t size,
   }
 }
 
-
+void PeerEventHandler::OnSignalStatus(SignalStatus status, const char* user_id,
-void PeerEventHandler::OnSignalStatus(SignalStatus status, const char *user_id,
+                                      size_t user_id_size, void* user_data) {
-                                      size_t user_id_size, void *user_data) {
+  auto* handler = static_cast<PeerEventHandler*>(user_data);
-  auto *handler = static_cast<PeerEventHandler *>(user_data);
+  GuiRuntime* runtime = handler ? &handler->owner_ : nullptr;
-  GuiRuntime *runtime = handler ? &handler->owner_ : nullptr;
   if (!runtime) {
     return;
   }
@@ -150,13 +149,12 @@ void PeerEventHandler::OnSignalStatus(SignalStatus status, const char *user_id,
 }
 
 void PeerEventHandler::OnConnectionStatus(ConnectionStatus status,
-                                          const char *user_id,
+                                          const char* user_id,
                                           const size_t user_id_size,
-                                          void *user_data) {
+                                          void* user_data) {
-  auto *handler = static_cast<PeerEventHandler *>(user_data);
+  auto* handler = static_cast<PeerEventHandler*>(user_data);
-  GuiRuntime *runtime = handler ? &handler->owner_ : nullptr;
+  GuiRuntime* runtime = handler ? &handler->owner_ : nullptr;
-  if (!runtime)
+  if (!runtime) return;
-    return;
 
   std::string remote_id(user_id, user_id_size);
   std::shared_ptr<GuiRuntime::RemoteSession> props;
@@ -172,113 +170,112 @@ void PeerEventHandler::OnConnectionStatus(ConnectionStatus status,
     runtime->is_client_mode_ = true;
     runtime->show_connection_status_window_ = true;
     props->connection_status_.store(status);
-    if (status != ConnectionStatus::Connecting &&
-        status != ConnectionStatus::Gathering) {
-      props->connection_attempt_active_.store(false);
-    }
 
     switch (status) {
-    case ConnectionStatus::Connected: {
+      case ConnectionStatus::Connected: {
-      runtime->ResetRemoteServiceStatus(*props);
+        runtime->ResetRemoteServiceStatus(*props);
-      {
+        {
-        RemoteAction remote_action;
+          RemoteAction remote_action;
-        remote_action.i.display_num =
+          remote_action.i.display_num =
-            runtime->devices_.display_info_list().size();
+              runtime->devices_.display_info_list().size();
-        remote_action.i.display_list =
+          remote_action.i.display_list =
-            (char **)malloc(remote_action.i.display_num * sizeof(char *));
+              (char**)malloc(remote_action.i.display_num * sizeof(char*));
-        remote_action.i.left =
+          remote_action.i.left =
-            (int *)malloc(remote_action.i.display_num * sizeof(int));
+              (int*)malloc(remote_action.i.display_num * sizeof(int));
-        remote_action.i.top =
+          remote_action.i.top =
-            (int *)malloc(remote_action.i.display_num * sizeof(int));
+              (int*)malloc(remote_action.i.display_num * sizeof(int));
-        remote_action.i.right =
+          remote_action.i.right =
-            (int *)malloc(remote_action.i.display_num * sizeof(int));
+              (int*)malloc(remote_action.i.display_num * sizeof(int));
-        remote_action.i.bottom =
+          remote_action.i.bottom =
-            (int *)malloc(remote_action.i.display_num * sizeof(int));
+              (int*)malloc(remote_action.i.display_num * sizeof(int));
-        for (int i = 0; i < remote_action.i.display_num; i++) {
+          for (int i = 0; i < remote_action.i.display_num; i++) {
-          LOG_INFO("Local display [{}:{}]", i + 1,
+            LOG_INFO("Local display [{}:{}]", i + 1,
-                   runtime->devices_.display_info_list()[i].name);
+                     runtime->devices_.display_info_list()[i].name);
-          remote_action.i.display_list[i] = (char *)malloc(
+            remote_action.i.display_list[i] = (char*)malloc(
-              runtime->devices_.display_info_list()[i].name.length() + 1);
+                runtime->devices_.display_info_list()[i].name.length() + 1);
-          strncpy(remote_action.i.display_list[i],
+            strncpy(remote_action.i.display_list[i],
-                  runtime->devices_.display_info_list()[i].name.c_str(),
+                    runtime->devices_.display_info_list()[i].name.c_str(),
-                  runtime->devices_.display_info_list()[i].name.length());
+                    runtime->devices_.display_info_list()[i].name.length());
-          remote_action.i.display_list
+            remote_action.i
-              [i][runtime->devices_.display_info_list()[i].name.length()] = '\0';
+                .display_list[i][runtime->devices_.display_info_list()[i]
-          remote_action.i.left[i] =
+                                     .name.length()] = '\0';
-              runtime->devices_.display_info_list()[i].left;
+            remote_action.i.left[i] =
-          remote_action.i.top[i] = runtime->devices_.display_info_list()[i].top;
+                runtime->devices_.display_info_list()[i].left;
-          remote_action.i.right[i] =
+            remote_action.i.top[i] =
-              runtime->devices_.display_info_list()[i].right;
+                runtime->devices_.display_info_list()[i].top;
-          remote_action.i.bottom[i] =
+            remote_action.i.right[i] =
-              runtime->devices_.display_info_list()[i].bottom;
+                runtime->devices_.display_info_list()[i].right;
+            remote_action.i.bottom[i] =
+                runtime->devices_.display_info_list()[i].bottom;
+          }
+
+          std::string host_name = GetHostName();
+          remote_action.type = ControlType::host_infomation;
+          memcpy(&remote_action.i.host_name, host_name.data(),
+                 host_name.size());
+          remote_action.i.host_name[host_name.size()] = '\0';
+          remote_action.i.host_name_size = host_name.size();
+
+          std::string msg = remote_action.to_json();
+          int ret = SendReliableDataFrame(props->peer_, msg.data(), msg.size(),
+                                          runtime->control_data_label_.c_str());
+          remote_action_codec::Free(remote_action);
         }
 
-        std::string host_name = GetHostName();
+        if (!runtime->need_to_create_stream_window_ &&
-        remote_action.type = ControlType::host_infomation;
+            !runtime->remote_sessions_.empty()) {
-        memcpy(&remote_action.i.host_name, host_name.data(), host_name.size());
+          runtime->need_to_create_stream_window_ = true;
-        remote_action.i.host_name[host_name.size()] = '\0';
+        }
-        remote_action.i.host_name_size = host_name.size();
+        props->connection_established_ = true;
-
+        runtime->start_keyboard_capturer_ = true;
-        std::string msg = remote_action.to_json();
+        break;
-        int ret = SendReliableDataFrame(props->peer_, msg.data(), msg.size(),
-                                        runtime->control_data_label_.c_str());
-        remote_action_codec::Free(remote_action);
       }
-
+      case ConnectionStatus::Disconnected:
-      if (!runtime->need_to_create_stream_window_ &&
+      case ConnectionStatus::Failed:
-          !runtime->remote_sessions_.empty()) {
+      case ConnectionStatus::Closed: {
-        runtime->need_to_create_stream_window_ = true;
+        runtime->keyboard_.ReleaseRemotePressedKeys(remote_id,
-      }
+                                                    "connection_closed");
-      props->connection_established_ = true;
-      runtime->start_keyboard_capturer_ = true;
-      break;
-    }
-    case ConnectionStatus::Disconnected:
-    case ConnectionStatus::Failed:
-    case ConnectionStatus::Closed: {
-      runtime->keyboard_.ReleaseRemotePressedKeys(remote_id,
-                                                 "connection_closed");
-      props->connection_established_ = false;
-      props->enable_mouse_control_ = false;
-      runtime->ResetRemoteServiceStatus(*props);
-
-      {
-        std::lock_guard<std::mutex> lock(props->video_frame_mutex_);
-        props->front_frame_.reset();
-        props->back_frame_.reset();
-        props->video_width_ = 0;
-        props->video_height_ = 0;
-        props->video_size_ = 0;
-        props->render_rect_dirty_ = true;
-        props->stream_cleanup_pending_ = true;
-      }
-
-      runtime->focus_on_stream_window_ = false;
-
-      break;
-    }
-    case ConnectionStatus::IncorrectPassword: {
-      runtime->password_validating_ = false;
-      runtime->password_validating_time_++;
-      if (runtime->connect_button_pressed_) {
-        runtime->connect_button_pressed_ = false;
         props->connection_established_ = false;
-        runtime->connect_button_label_ =
+        props->enable_mouse_control_ = false;
-            localization::connect[runtime->localization_language_index_];
+        runtime->ResetRemoteServiceStatus(*props);
+
+        {
+          std::lock_guard<std::mutex> lock(props->video_frame_mutex_);
+          props->front_frame_.reset();
+          props->back_frame_.reset();
+          props->video_width_ = 0;
+          props->video_height_ = 0;
+          props->video_size_ = 0;
+          props->render_rect_dirty_ = true;
+          props->stream_cleanup_pending_ = true;
+        }
+
+        runtime->focus_on_stream_window_ = false;
+
+        break;
       }
-      break;
+      case ConnectionStatus::IncorrectPassword: {
-    }
+        runtime->password_validating_ = false;
-    case ConnectionStatus::NoSuchTransmissionId:
+        runtime->password_validating_time_++;
-    case ConnectionStatus::RemoteUnavailable: {
+        if (runtime->connect_button_pressed_) {
-      if (runtime->connect_button_pressed_) {
+          runtime->connect_button_pressed_ = false;
-        props->connection_established_ = false;
+          props->connection_established_ = false;
-        runtime->connect_button_label_ =
+          runtime->connect_button_label_ =
-            localization::connect[runtime->localization_language_index_];
+              localization::connect[runtime->localization_language_index_];
+        }
+        break;
       }
-      break;
+      case ConnectionStatus::NoSuchTransmissionId:
-    }
+      case ConnectionStatus::RemoteUnavailable: {
-    default:
+        if (runtime->connect_button_pressed_) {
-      break;
+          props->connection_established_ = false;
+          runtime->connect_button_label_ =
+              localization::connect[runtime->localization_language_index_];
+        }
+        break;
+      }
+      default:
+        break;
     }
   } else {
     runtime->is_client_mode_ = false;
@@ -289,155 +286,107 @@ void PeerEventHandler::OnConnectionStatus(ConnectionStatus status,
     }
 
     switch (status) {
-    case ConnectionStatus::Connected: {
+      case ConnectionStatus::Connected: {
 #if _WIN32
-      runtime->last_windows_service_status_tick_ = 0;
+        runtime->last_windows_service_status_tick_ = 0;
 #endif
-      {
-        RemoteAction remote_action;
-        remote_action.i.display_num =
-            runtime->devices_.display_info_list().size();
-        remote_action.i.display_list =
-            (char **)malloc(remote_action.i.display_num * sizeof(char *));
-        remote_action.i.left =
-            (int *)malloc(remote_action.i.display_num * sizeof(int));
-        remote_action.i.top =
-            (int *)malloc(remote_action.i.display_num * sizeof(int));
-        remote_action.i.right =
-            (int *)malloc(remote_action.i.display_num * sizeof(int));
-        remote_action.i.bottom =
-            (int *)malloc(remote_action.i.display_num * sizeof(int));
-        for (int i = 0; i < remote_action.i.display_num; i++) {
-          LOG_INFO("Local display [{}:{}]", i + 1,
-                   runtime->devices_.display_info_list()[i].name);
-          remote_action.i.display_list[i] = (char *)malloc(
-              runtime->devices_.display_info_list()[i].name.length() + 1);
-          strncpy(remote_action.i.display_list[i],
-                  runtime->devices_.display_info_list()[i].name.c_str(),
-                  runtime->devices_.display_info_list()[i].name.length());
-          remote_action.i.display_list
-              [i][runtime->devices_.display_info_list()[i].name.length()] = '\0';
-          remote_action.i.left[i] =
-              runtime->devices_.display_info_list()[i].left;
-          remote_action.i.top[i] = runtime->devices_.display_info_list()[i].top;
-          remote_action.i.right[i] =
-              runtime->devices_.display_info_list()[i].right;
-          remote_action.i.bottom[i] =
-              runtime->devices_.display_info_list()[i].bottom;
-        }
-
-        std::string host_name = GetHostName();
-        remote_action.type = ControlType::host_infomation;
-        memcpy(&remote_action.i.host_name, host_name.data(), host_name.size());
-        remote_action.i.host_name[host_name.size()] = '\0';
-        remote_action.i.host_name_size = host_name.size();
-
-        std::string msg = remote_action.to_json();
-        int ret = SendReliableDataFrame(runtime->peer_, msg.data(), msg.size(),
-                                        runtime->control_data_label_.c_str());
-        remote_action_codec::Free(remote_action);
-      }
-
-      runtime->need_to_create_server_window_ = true;
-      runtime->is_server_mode_ = true;
-      runtime->start_screen_capturer_ = true;
-      runtime->start_speaker_capturer_ = true;
-      runtime->remote_client_id_ = remote_id;
-      runtime->start_mouse_controller_ = true;
-      {
-        std::shared_lock lock(runtime->connection_status_mutex_);
-        if (std::all_of(runtime->connection_status_.begin(),
-                        runtime->connection_status_.end(), [](const auto &kv) {
-                          return kv.first.find("web") != std::string::npos;
-                        })) {
-          runtime->show_cursor_ = true;
-        }
-      }
-
-      break;
-    }
-    case ConnectionStatus::Disconnected:
-    case ConnectionStatus::Failed:
-    case ConnectionStatus::Closed: {
-      runtime->keyboard_.ReleaseRemotePressedKeys(remote_id,
-                                                 "connection_closed");
-      bool all_disconnected = false;
-      {
-        std::shared_lock lock(runtime->connection_status_mutex_);
-        all_disconnected =
-            std::all_of(runtime->connection_status_.begin(),
-                        runtime->connection_status_.end(), [](const auto &kv) {
-                          return kv.second == ConnectionStatus::Closed ||
-                                 kv.second == ConnectionStatus::Failed ||
-                                 kv.second == ConnectionStatus::Disconnected;
-                        });
-      }
-      if (all_disconnected) {
-        runtime->need_to_destroy_server_window_ = true;
-        runtime->is_server_mode_ = false;
-#if defined(__linux__) && !defined(__APPLE__)
-        if (IsWaylandSession()) {
-          // Keep Wayland capture session warm to avoid black screen on
-          // subsequent reconnects.
-          runtime->start_screen_capturer_ = true;
-          LOG_INFO("Keeping Wayland screen capturer running after "
-                   "disconnect to preserve reconnect stability");
-        } else {
-          runtime->start_screen_capturer_ = false;
-        }
-#else
-        runtime->start_screen_capturer_ = false;
-#endif
-        runtime->start_speaker_capturer_ = false;
-        runtime->start_mouse_controller_ = false;
-        runtime->start_keyboard_capturer_ = false;
-        runtime->remote_client_id_ = "";
-        if (props)
-          props->connection_established_ = false;
-        if (runtime->audio_capture_) {
-          runtime->devices_.StopSpeakerCapturer();
-          runtime->audio_capture_ = false;
-        }
-
         {
-          std::unique_lock lock(runtime->connection_status_mutex_);
+          RemoteAction remote_action;
-          runtime->connection_status_.erase(remote_id);
+          remote_action.i.display_num =
-          runtime->connection_host_names_.erase(remote_id);
+              runtime->devices_.display_info_list().size();
-        }
+          remote_action.i.display_list =
-        runtime->devices_.ResetToInitialDisplay();
+              (char**)malloc(remote_action.i.display_num * sizeof(char*));
-      }
+          remote_action.i.left =
+              (int*)malloc(remote_action.i.display_num * sizeof(int));
+          remote_action.i.top =
+              (int*)malloc(remote_action.i.display_num * sizeof(int));
+          remote_action.i.right =
+              (int*)malloc(remote_action.i.display_num * sizeof(int));
+          remote_action.i.bottom =
+              (int*)malloc(remote_action.i.display_num * sizeof(int));
+          for (int i = 0; i < remote_action.i.display_num; i++) {
+            LOG_INFO("Local display [{}:{}]", i + 1,
+                     runtime->devices_.display_info_list()[i].name);
+            remote_action.i.display_list[i] = (char*)malloc(
+                runtime->devices_.display_info_list()[i].name.length() + 1);
+            strncpy(remote_action.i.display_list[i],
+                    runtime->devices_.display_info_list()[i].name.c_str(),
+                    runtime->devices_.display_info_list()[i].name.length());
+            remote_action.i
+                .display_list[i][runtime->devices_.display_info_list()[i]
+                                     .name.length()] = '\0';
+            remote_action.i.left[i] =
+                runtime->devices_.display_info_list()[i].left;
+            remote_action.i.top[i] =
+                runtime->devices_.display_info_list()[i].top;
+            remote_action.i.right[i] =
+                runtime->devices_.display_info_list()[i].right;
+            remote_action.i.bottom[i] =
+                runtime->devices_.display_info_list()[i].bottom;
+          }
 
-      {
+          std::string host_name = GetHostName();
-        std::shared_lock lock(runtime->connection_status_mutex_);
+          remote_action.type = ControlType::host_infomation;
-        if (std::all_of(runtime->connection_status_.begin(),
+          memcpy(&remote_action.i.host_name, host_name.data(),
-                        runtime->connection_status_.end(), [](const auto &kv) {
+                 host_name.size());
-                          return kv.first.find("web") == std::string::npos;
+          remote_action.i.host_name[host_name.size()] = '\0';
-                        })) {
+          remote_action.i.host_name_size = host_name.size();
-          runtime->show_cursor_ = false;
-        }
-      }
 
-      break;
+          std::string msg = remote_action.to_json();
-    }
+          int ret =
-    default:
+              SendReliableDataFrame(runtime->peer_, msg.data(), msg.size(),
-      break;
+                                    runtime->control_data_label_.c_str());
+          remote_action_codec::Free(remote_action);
+        }
+
+        runtime->need_to_destroy_server_window_.store(
+            false, std::memory_order_release);
+        runtime->need_to_create_server_window_.store(true,
+                                                     std::memory_order_release);
+        runtime->is_server_mode_ = true;
+        runtime->start_screen_capturer_ = true;
+        runtime->start_speaker_capturer_ = true;
+        runtime->remote_client_id_ = remote_id;
+        runtime->start_mouse_controller_ = true;
+        {
+          std::shared_lock lock(runtime->connection_status_mutex_);
+          if (std::all_of(runtime->connection_status_.begin(),
+                          runtime->connection_status_.end(),
+                          [](const auto& kv) {
+                            return kv.first.find("web") != std::string::npos;
+                          })) {
+            runtime->show_cursor_ = true;
+          }
+        }
+
+        break;
+      }
+      case ConnectionStatus::Disconnected:
+      case ConnectionStatus::Failed:
+      case ConnectionStatus::Closed: {
+        runtime->HandleServerControllerDisconnected(remote_id,
+                                                    "connection_closed");
+        break;
+      }
+      default:
+        break;
     }
   }
 }
 
 void PeerEventHandler::OnNetStatusReport(
-    const char *client_id, size_t client_id_size, TraversalMode mode,
+    const char* client_id, size_t client_id_size, TraversalMode mode,
-    const XNetTrafficStats *net_traffic_stats, const char *user_id,
+    const XNetTrafficStats* net_traffic_stats, const char* user_id,
-    const size_t user_id_size, void *user_data) {
+    const size_t user_id_size, void* user_data) {
-  auto *handler = static_cast<PeerEventHandler *>(user_data);
+  auto* handler = static_cast<PeerEventHandler*>(user_data);
-  GuiRuntime *runtime = handler ? &handler->owner_ : nullptr;
+  GuiRuntime* runtime = handler ? &handler->owner_ : nullptr;
   if (!runtime) {
     return;
   }
 
   if (strchr(client_id, '@') != nullptr && strchr(user_id, '-') == nullptr) {
     std::string id, password;
-    const char *at_pos = strchr(client_id, '@');
+    const char* at_pos = strchr(client_id, '@');
     if (at_pos == nullptr) {
       id = client_id;
       password.clear();
@@ -510,4 +459,4 @@ void PeerEventHandler::OnNetStatusReport(
     props->net_traffic_stats_ = *net_traffic_stats;
   }
 }
-} // namespace crossdesk
+}  // namespace crossdesk

src/gui/runtime/remote_session.h

@@ -58,7 +58,7 @@ struct FileTransferState {
 // connection, media, input, window and transfer data that share one lifetime.
 struct RemoteSession {
   Params params_;
-  PeerPtr *peer_ = nullptr;
+  PeerPtr* peer_ = nullptr;
   std::string audio_label_ = "control_audio";
   std::string data_label_ = "data";
   std::string mouse_label_ = "mouse";
@@ -74,8 +74,6 @@ struct RemoteSession {
   SignalStatus signal_status_ = SignalStatus::SignalClosed;
   bool connection_established_ = false;
   bool rejoin_ = false;
-  std::atomic<bool> connection_attempt_active_ = false;
-  std::chrono::steady_clock::time_point connection_attempt_started_at_;
   bool net_traffic_stats_button_pressed_ = false;
   bool enable_mouse_control_ = true;
   bool mouse_controller_is_started_ = false;
@@ -160,6 +158,6 @@ struct RemoteSession {
 
 using RemoteSessionPtr = std::shared_ptr<RemoteSession>;
 
-} // namespace crossdesk::gui_detail
+}  // namespace crossdesk::gui_detail
 
-#endif // CROSSDESK_GUI_REMOTE_SESSION_H_
+#endif  // CROSSDESK_GUI_REMOTE_SESSION_H_

src/gui/ui/common.slint

@@ -295,7 +295,7 @@ export component ImGuiCheckBox inherits Rectangle {
     border-radius: 4px;
     if root.checked: Text {
         text: FontAwesomeIcons.check;
-        color: #2e86de;
+        color: root.enabled ? #2e86de : #8b8f95;
         font-family: "Font Awesome 6 Free";
         font-weight: 900;
         font-size: 16px;

src/gui/ui/main_window.slint

@@ -184,15 +184,21 @@ component ConnectionDialogButton inherits Rectangle {
 export component MainWindow inherits Window {
     title: "CrossDesk";
     preferred-width: 640px;
-    preferred-height: 450px;
+    preferred-height: 450px + root.titlebar-height;
     min-width: 640px;
     max-width: 640px;
-    min-height: 450px;
+    min-height: 450px + root.titlebar-height;
-    max-height: 450px;
+    max-height: 450px + root.titlebar-height;
-    no-frame: false;
+    no-frame: root.custom-titlebar;
-    background: white;
+    background: root.wayland-titlebar ? transparent : white;
     default-font-size: ImGuiFontStyle.base;
 
+    in property <bool> custom-titlebar: false;
+    in property <bool> wayland-titlebar: false;
+    in property <bool> window-active: true;
+    private property <length> titlebar-height:
+        root.custom-titlebar ? (root.wayland-titlebar ? 32px : 31px) : 0px;
+    private property <length> wayland-corner-radius: 12px;
     in property <string> local-id: "";
     in property <string> local-password: "";
     in-out property <string> remote-id-input: "";
@@ -242,7 +248,9 @@ export component MainWindow inherits Window {
     in-out property <string> server-port: "";
     in-out property <string> coturn-port: "";
     in property <bool> settings-session-active: false;
-    in property <bool> hardware-codec-visible: true;
+    // Keep the setting visible on every platform. Unsupported builds expose it
+    // as disabled so the fixed settings layout never turns into a blank row.
+    in property <bool> hardware-codec-available: true;
 
     callback copy-local-id;
     callback toggle-password-visibility;
@@ -268,9 +276,13 @@ export component MainWindow inherits Window {
     callback cancel-portable-service;
     callback acknowledge-portable-service;
     callback acknowledge-portable-service-suppressed;
+    callback main-title-drag(int, length, length);
+    callback minimize-main-window;
+    callback close-main-window;
 
     private property <bool> menu-open: false;
     in-out property <bool> settings-open: false;
+    private property <length> settings-scroll-y: 0px;
     in-out property <bool> self-host-settings-open: false;
     in-out property <bool> about-open: false;
     in-out property <bool> update-open: root.update-available;
@@ -304,17 +316,216 @@ export component MainWindow inherits Window {
                 ? root.recent-tooltip-pointer-x - root.recent-tooltip-width - 12px
                 : root.recent-tooltip-pointer-x + 12px));
     private property <length> recent-tooltip-y: min(
-        root.height - root.recent-tooltip-height - 8px,
+        root.height - root.titlebar-height - root.recent-tooltip-height - 8px,
         max(8px, root.recent-tooltip-pointer-y - root.recent-tooltip-height - 8px));
 
+    changed settings-open => {
+        if root.settings-open {
+            root.settings-scroll-y = 0px;
+            focus-sink.focus();
+        }
+    }
+
     reset-remote-id => {
         root.remote-id-input = "";
         remote-id-editor.focus();
     }
 
-    Rectangle {
+    window-surface := Rectangle {
         width: root.width;
         height: root.height;
+        background: root.wayland-titlebar ? #f6f5f4 : transparent;
+        border-radius:
+            root.wayland-titlebar ? root.wayland-corner-radius : 0px;
+        clip: root.wayland-titlebar;
+
+        if root.custom-titlebar && root.wayland-titlebar: Rectangle {
+            x: 0px;
+            y: 0px;
+            width: parent.width;
+            height: root.titlebar-height;
+            background: #f6f5f4;
+            z: 100;
+
+            Text {
+                x: 80px;
+                width: parent.width - 160px;
+                height: parent.height;
+                text: "CrossDesk";
+                color: root.window-active ? #3d3d3d : #747474;
+                font-size: 12px;
+                font-weight: 600;
+                horizontal-alignment: center;
+                vertical-alignment: center;
+                overflow: elide;
+            }
+            wayland-title-drag := TouchArea {
+                width: parent.width - 80px;
+                property <int> phase: self.pressed ? 1 : 0;
+                changed phase => {
+                    root.main-title-drag(phase, self.mouse-x, self.mouse-y);
+                }
+                moved => {
+                    if (self.pressed) {
+                        root.main-title-drag(2, self.mouse-x, self.mouse-y);
+                    }
+                }
+            }
+            wayland-minimize-button := Rectangle {
+                x: parent.width - 74px;
+                y: 4px;
+                width: 24px;
+                height: 24px;
+                border-radius: 12px;
+                background: wayland-minimize-touch.pressed ? #c0bfbc
+                          : wayland-minimize-touch.has-hover ? #deddda
+                          : root.window-active ? #e6e6e6
+                                               : transparent;
+                accessible-role: button;
+                accessible-label: "Minimize";
+                accessible-action-default => { wayland-minimize-touch.clicked(); }
+                Rectangle {
+                    x: 8px;
+                    y: 13px;
+                    width: 8px;
+                    height: 0.75px;
+                    background: root.window-active
+                        || wayland-minimize-touch.has-hover
+                        || wayland-minimize-touch.pressed ? #454545 : #898989;
+                }
+                wayland-minimize-touch := TouchArea {
+                    clicked => { root.minimize-main-window(); }
+                }
+            }
+            wayland-close-button := Rectangle {
+                x: parent.width - 34px;
+                y: 4px;
+                width: 24px;
+                height: 24px;
+                border-radius: 12px;
+                background: wayland-close-touch.pressed ? #b2161d
+                          : wayland-close-touch.has-hover ? #e01b24
+                          : root.window-active ? #e6e6e6
+                                               : transparent;
+                accessible-role: button;
+                accessible-label: "Close";
+                accessible-action-default => { wayland-close-touch.clicked(); }
+                Path {
+                    width: parent.width;
+                    height: parent.height;
+                    viewbox-width: 24;
+                    viewbox-height: 24;
+                    commands: "M 14.75 14.75 L 8.25 8.25 M 14.75 8.25 L 8.25 14.75";
+                    stroke: wayland-close-touch.has-hover
+                        || wayland-close-touch.pressed ? white
+                        : root.window-active ? #454545 : #898989;
+                    stroke-width: 1px;
+                }
+                wayland-close-touch := TouchArea {
+                    clicked => { root.close-main-window(); }
+                }
+            }
+            Rectangle {
+                y: parent.height - 1px;
+                height: 1px;
+                background: #d5d3d0;
+            }
+        }
+
+    if root.custom-titlebar && !root.wayland-titlebar: Rectangle {
+        x: 0px;
+        y: 0px;
+        width: root.width;
+        height: 31px;
+        background: #f9f9f9;
+        z: 100;
+
+        Image {
+            x: 8px;
+            y: 7px;
+            width: 16px;
+            height: 16px;
+            source: @image-url("../../../icons/linux/crossdesk_16x16.png");
+            image-fit: contain;
+        }
+        Text {
+            x: 30px;
+            width: parent.width - 122px;
+            height: parent.height;
+            text: "CrossDesk";
+            color: #202124;
+            font-size: 12px;
+            vertical-alignment: center;
+            overflow: elide;
+        }
+        title-drag := TouchArea {
+            x: 0px;
+            width: parent.width - 92px;
+            property <int> phase: self.pressed ? 1 : 0;
+            changed phase => { root.main-title-drag(phase, self.mouse-x, self.mouse-y); }
+            moved => { if (self.pressed) { root.main-title-drag(2, self.mouse-x, self.mouse-y); } }
+        }
+        minimize-button := Rectangle {
+            x: parent.width - 92px;
+            width: 46px;
+            height: parent.height;
+            background: minimize-touch.pressed ? #c7c7c7
+                      : minimize-touch.has-hover ? #e5e5e5
+                                                 : transparent;
+            accessible-role: button;
+            accessible-label: "Minimize";
+            accessible-action-default => { minimize-touch.clicked(); }
+            Text {
+                text: FontAwesomeIcons.minus;
+                color: #202124;
+                font-family: "Font Awesome 6 Free";
+                font-weight: 900;
+                font-size: 10px;
+                horizontal-alignment: center;
+                vertical-alignment: center;
+                accessible-role: none;
+            }
+            minimize-touch := TouchArea { clicked => { root.minimize-main-window(); } }
+        }
+        close-button := Rectangle {
+            x: parent.width - 46px;
+            width: 46px;
+            height: parent.height;
+            background: close-touch.pressed ? #b3251b
+                      : close-touch.has-hover ? #c42b1c
+                                              : transparent;
+            accessible-role: button;
+            accessible-label: "Close";
+            accessible-action-default => { close-touch.clicked(); }
+            Text {
+                text: FontAwesomeIcons.xmark;
+                color: close-touch.has-hover || close-touch.pressed ? white : #202124;
+                font-family: "Font Awesome 6 Free";
+                font-weight: 900;
+                font-size: 12px;
+                horizontal-alignment: center;
+                vertical-alignment: center;
+                accessible-role: none;
+            }
+            close-touch := TouchArea { clicked => { root.close-main-window(); } }
+        }
+        Rectangle {
+            y: parent.height - 1px;
+            height: 1px;
+            background: #d4d4d4;
+        }
+    }
+
+    content-layer := Rectangle {
+        x: 0px;
+        y: root.titlebar-height;
+        width: root.width;
+        height: root.height - self.y;
+        clip: true;
+
+    Rectangle {
+        width: parent.width;
+        height: parent.height;
         background: white;
         border-width: 0px;
         border-radius: 0px;
@@ -334,8 +545,8 @@ export component MainWindow inherits Window {
             z: 7;
         }
 
-        // App actions live in the content header; native window controls and
+        // App actions live in the content header; window controls and dragging
-        // dragging are provided by the system title bar.
+        // remain in the native or Windows-specific title bar above it.
         menu-button := IconButton {
             x: parent.width - 40px;
             y: 4px;
@@ -780,8 +991,8 @@ export component MainWindow inherits Window {
     if root.menu-open: TouchArea {
         x: 0px;
         y: 0px;
-        width: root.width;
+        width: parent.width;
-        height: root.height;
+        height: parent.height;
         z: 9;
         clicked => {
             root.menu-open = false;
@@ -1185,9 +1396,9 @@ export component MainWindow inherits Window {
         TouchArea { clicked => { focus-sink.focus(); } }
         DialogSurface {
             x: root.compact-language ? 219px : 190px;
-            y: 9px;
+            y: 60px;
             width: root.compact-language ? 202px : 269px;
-            height: 432px;
+            height: 330px;
             border-radius: 7px;
 
             Rectangle {
@@ -1202,55 +1413,86 @@ export component MainWindow inherits Window {
                 Text { x: 6px; text: UiStrings.settings; font-size: ImGuiFontStyle.base; font-weight: 600; color: #202124; vertical-alignment: center; }
             }
 
-            Text { x: 8px; y: 31px; width: root.compact-language ? 108px : 176px; height: 24px; text: UiStrings.language; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
+            settings-scroll := ScrollView {
-            CompactComboBox { x: root.compact-language ? 120px : 188px; y: 30px; model: ["中文", "English", "Русский"]; current-index <=> root.language-index; }
+                x: 0px;
-            Rectangle { x: 7px; y: 57px; width: parent.width - 14px; height: 1px; background: ImGuiLineStyle.separator; }
+                y: 21px;
+                width: parent.width;
+                height: 265px;
+                viewport-y <=> root.settings-scroll-y;
 
-            Text { x: 8px; y: 61px; width: root.compact-language ? 108px : 176px; height: 24px; text: UiStrings.video-quality; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
+                settings-content := VerticalLayout {
-            CompactComboBox { x: root.compact-language ? 120px : 188px; y: 60px; enabled: !root.settings-session-active; model: [UiStrings.quality-low, UiStrings.quality-medium, UiStrings.quality-high]; current-index <=> root.video-quality-index; }
+                    // Reserve space for the overlaid vertical scrollbar.
-            Rectangle { x: 7px; y: 87px; width: parent.width - 14px; height: 1px; background: ImGuiLineStyle.separator; }
+                    width: settings-scroll.width;
+                    padding-top: 8px;
+                    padding-bottom: 8px;
+                    spacing: 0px;
 
-            Text { x: 8px; y: 91px; width: root.compact-language ? 108px : 176px; height: 24px; text: UiStrings.frame-rate; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
+                    Rectangle {
-            CompactComboBox { x: root.compact-language ? 120px : 188px; y: 90px; enabled: !root.settings-session-active; model: ["30 fps", "60 fps"]; current-index <=> root.frame-rate-index; }
+                        height: 30px;
-            Rectangle { x: 7px; y: 117px; width: parent.width - 14px; height: 1px; background: ImGuiLineStyle.separator; }
+                        Text { x: 8px; y: 3px; width: root.compact-language ? 94px : 162px; height: 24px; text: UiStrings.language; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
+                        CompactComboBox { x: root.compact-language ? 106px : 174px; y: 2px; model: ["中文", "English", "Русский"]; current-index <=> root.language-index; }
+                    }
+                    Rectangle {
+                        height: 30px;
+                        Text { x: 8px; y: 3px; width: root.compact-language ? 94px : 162px; height: 24px; text: UiStrings.video-quality; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
+                        CompactComboBox { x: root.compact-language ? 106px : 174px; y: 2px; enabled: !root.settings-session-active; model: [UiStrings.quality-low, UiStrings.quality-medium, UiStrings.quality-high]; current-index <=> root.video-quality-index; }
+                    }
+                    Rectangle {
+                        height: 30px;
+                        Text { x: 8px; y: 3px; width: root.compact-language ? 94px : 162px; height: 24px; text: UiStrings.frame-rate; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
+                        CompactComboBox { x: root.compact-language ? 106px : 174px; y: 2px; enabled: !root.settings-session-active; model: ["30 fps", "60 fps"]; current-index <=> root.frame-rate-index; }
+                    }
+                    Rectangle {
+                        height: 30px;
+                        Text { x: 8px; y: 3px; width: root.compact-language ? 94px : 162px; height: 24px; text: UiStrings.codec; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
+                        CompactComboBox { x: root.compact-language ? 106px : 174px; y: 2px; enabled: !root.settings-session-active; model: [UiStrings.codec-h264, UiStrings.codec-av1]; current-index <=> root.codec-index; }
+                    }
+                    Rectangle {
+                        height: 30px;
+                        Text { x: 8px; y: 3px; width: root.compact-language ? 145px : 212px; height: 24px; text: UiStrings.hardware-codec; color: root.hardware-codec-available ? #202124 : #8b8f95; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
+                        ImGuiCheckBox { x: root.compact-language ? 157px : 224px; y: 3px; checked <=> root.hardware-codec-enabled; enabled: root.hardware-codec-available && !root.settings-session-active; }
+                    }
+                    Rectangle {
+                        height: 30px;
+                        Text { x: 8px; y: 3px; width: root.compact-language ? 145px : 212px; height: 24px; text: UiStrings.turn-relay; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
+                        ImGuiCheckBox { x: root.compact-language ? 157px : 224px; y: 3px; checked <=> root.turn-enabled; enabled: !root.settings-session-active; }
+                    }
+                    Rectangle {
+                        height: 30px;
+                        Text { x: 8px; y: 3px; width: root.compact-language ? 145px : 212px; height: 24px; text: UiStrings.srtp; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
+                        ImGuiCheckBox { x: root.compact-language ? 157px : 224px; y: 3px; checked <=> root.srtp-enabled; enabled: !root.settings-session-active; }
+                    }
+                    Rectangle {
+                        height: 30px;
+                        CompactButton { x: 8px; y: 3px; width: root.compact-language ? 70px : 206px; text: UiStrings.self-hosted; enabled: !root.settings-session-active; clicked => { root.self-host-settings-open = true; } }
+                        ImGuiCheckBox { x: root.compact-language ? 157px : 224px; y: 3px; checked <=> root.self-hosted-enabled; enabled: !root.settings-session-active; }
+                    }
+                    Rectangle {
+                        height: 30px;
+                        Text { x: 8px; y: 3px; width: root.compact-language ? 145px : 212px; height: 24px; text: UiStrings.autostart; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
+                        ImGuiCheckBox { x: root.compact-language ? 157px : 224px; y: 3px; checked <=> root.autostart-enabled; enabled: !root.settings-session-active; }
+                    }
+                    Rectangle {
+                        height: 30px;
+                        Text { x: 8px; y: 3px; width: root.compact-language ? 145px : 212px; height: 24px; text: UiStrings.daemon; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
+                        ImGuiCheckBox { x: root.compact-language ? 157px : 224px; y: 3px; checked <=> root.daemon-enabled; enabled: !root.settings-session-active; }
+                    }
+                    Rectangle {
+                        height: 30px;
+                        Text { x: 8px; y: 3px; width: root.compact-language ? 145px : 212px; height: 24px; text: UiStrings.minimize-to-tray; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
+                        ImGuiCheckBox { x: root.compact-language ? 157px : 224px; y: 3px; checked <=> root.minimize-to-tray-enabled; enabled: !root.settings-session-active; }
+                    }
+                    Rectangle {
+                        height: 30px;
+                        Text { x: 8px; y: 3px; width: root.compact-language ? 94px : 154px; height: 24px; text: UiStrings.file-save-path; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
+                        CompactButton { x: root.compact-language ? 106px : 166px; y: 3px; width: root.compact-language ? 73px : 80px; text: root.file-save-path == "" ? UiStrings.default-desktop : root.file-save-path; enabled: !root.settings-session-active; clicked => { root.browse-save-path(); } }
+                    }
+                }
+            }
 
-            Text { x: 8px; y: 121px; width: root.compact-language ? 108px : 176px; height: 24px; text: UiStrings.codec; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
+            Rectangle { x: 7px; y: 286px; width: parent.width - 14px; height: 1px; background: ImGuiLineStyle.separator; }
-            CompactComboBox { x: root.compact-language ? 120px : 188px; y: 120px; enabled: !root.settings-session-active; model: [UiStrings.codec-h264, UiStrings.codec-av1]; current-index <=> root.codec-index; }
+            CompactButton { x: root.compact-language ? 63px : 89px; y: 297px; primary: true; text: UiStrings.ok; clicked => { root.save-settings(); root.settings-open = false; root.self-host-settings-open = false; } }
-            Rectangle { x: 7px; y: 147px; width: parent.width - 14px; height: 1px; background: ImGuiLineStyle.separator; }
+            CompactButton { x: root.compact-language ? 104px : 130px; y: 297px; width: root.compact-language ? 34px : 56px; text: UiStrings.cancel; clicked => { root.cancel-settings(); root.settings-open = false; root.self-host-settings-open = false; } }
-
-            if root.hardware-codec-visible: Text { x: 8px; y: 151px; width: root.compact-language ? 155px : 225px; height: 24px; text: UiStrings.hardware-codec; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
-            if root.hardware-codec-visible: ImGuiCheckBox { x: root.compact-language ? 171px : 238px; y: 151px; checked <=> root.hardware-codec-enabled; enabled: !root.settings-session-active; }
-            Rectangle { x: 7px; y: 177px; width: parent.width - 14px; height: 1px; background: ImGuiLineStyle.separator; }
-
-            Text { x: 8px; y: 181px; width: root.compact-language ? 155px : 225px; height: 24px; text: UiStrings.turn-relay; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
-            ImGuiCheckBox { x: root.compact-language ? 171px : 238px; y: 181px; checked <=> root.turn-enabled; enabled: !root.settings-session-active; }
-            Rectangle { x: 7px; y: 207px; width: parent.width - 14px; height: 1px; background: ImGuiLineStyle.separator; }
-
-            Text { x: 8px; y: 211px; width: root.compact-language ? 155px : 225px; height: 24px; text: UiStrings.srtp; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
-            ImGuiCheckBox { x: root.compact-language ? 171px : 238px; y: 211px; checked <=> root.srtp-enabled; enabled: !root.settings-session-active; }
-            Rectangle { x: 7px; y: 237px; width: parent.width - 14px; height: 1px; background: ImGuiLineStyle.separator; }
-
-            CompactButton { x: 8px; y: 241px; width: root.compact-language ? 70px : 220px; text: UiStrings.self-hosted; enabled: !root.settings-session-active; clicked => { root.self-host-settings-open = true; } }
-            ImGuiCheckBox { x: root.compact-language ? 171px : 238px; y: 241px; checked <=> root.self-hosted-enabled; enabled: !root.settings-session-active; }
-            Rectangle { x: 7px; y: 267px; width: parent.width - 14px; height: 1px; background: ImGuiLineStyle.separator; }
-
-            Text { x: 8px; y: 271px; width: root.compact-language ? 155px : 225px; height: 24px; text: UiStrings.autostart; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
-            ImGuiCheckBox { x: root.compact-language ? 171px : 238px; y: 271px; checked <=> root.autostart-enabled; enabled: !root.settings-session-active; }
-            Rectangle { x: 7px; y: 297px; width: parent.width - 14px; height: 1px; background: ImGuiLineStyle.separator; }
-
-            Text { x: 8px; y: 301px; width: root.compact-language ? 155px : 225px; height: 24px; text: UiStrings.daemon; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
-            ImGuiCheckBox { x: root.compact-language ? 171px : 238px; y: 301px; checked <=> root.daemon-enabled; enabled: !root.settings-session-active; }
-            Rectangle { x: 7px; y: 327px; width: parent.width - 14px; height: 1px; background: ImGuiLineStyle.separator; }
-
-            Text { x: 8px; y: 331px; width: root.compact-language ? 155px : 225px; height: 24px; text: UiStrings.minimize-to-tray; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
-            ImGuiCheckBox { x: root.compact-language ? 171px : 238px; y: 331px; checked <=> root.minimize-to-tray-enabled; enabled: !root.settings-session-active; }
-            Rectangle { x: 7px; y: 357px; width: parent.width - 14px; height: 1px; background: ImGuiLineStyle.separator; }
-
-            Text { x: 8px; y: 361px; width: root.compact-language ? 108px : 168px; height: 24px; text: UiStrings.file-save-path; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
-            CompactButton { x: root.compact-language ? 120px : 180px; y: 361px; width: root.compact-language ? 73px : 80px; text: root.file-save-path == "" ? UiStrings.default-desktop : root.file-save-path; enabled: !root.settings-session-active; clicked => { root.browse-save-path(); } }
-
-            CompactButton { x: root.compact-language ? 63px : 89px; y: 396px; primary: true; text: UiStrings.ok; clicked => { root.save-settings(); root.settings-open = false; root.self-host-settings-open = false; } }
-            CompactButton { x: root.compact-language ? 104px : 130px; y: 396px; width: root.compact-language ? 34px : 56px; text: UiStrings.cancel; clicked => { root.cancel-settings(); root.settings-open = false; root.self-host-settings-open = false; } }
         }
     }
 
@@ -1289,7 +1531,6 @@ export component MainWindow inherits Window {
                 LineEdit { x: 1px; y: 1.5px; width: parent.width - 2px; height: parent.height - 2px; text <=> root.server-host; font-size: ImGuiFontStyle.body; }
                 LineEditFocusUnderlineMask { x: 5px; y: parent.height - 3px; width: parent.width - 10px; }
             }
-            Rectangle { x: 7px; y: 57px; width: parent.width - 14px; height: 1px; background: ImGuiLineStyle.separator; }
             Text { x: 8px; y: 61px; width: root.compact-language ? 88px : 165px; height: 24px; text: UiStrings.server-port; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
             Rectangle {
                 x: root.compact-language ? 100px : 173px;
@@ -1303,7 +1544,6 @@ export component MainWindow inherits Window {
                 LineEdit { x: 1px; y: 1.5px; width: parent.width - 2px; height: parent.height - 2px; text <=> root.server-port; input-type: InputType.number; font-size: ImGuiFontStyle.body; }
                 LineEditFocusUnderlineMask { x: 5px; y: parent.height - 3px; width: parent.width - 10px; }
             }
-            Rectangle { x: 7px; y: 87px; width: parent.width - 14px; height: 1px; background: ImGuiLineStyle.separator; }
             Text { x: 8px; y: 91px; width: root.compact-language ? 88px : 165px; height: 24px; text: UiStrings.coturn-port; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
             Rectangle {
                 x: root.compact-language ? 100px : 173px;
@@ -1317,7 +1557,6 @@ export component MainWindow inherits Window {
                 LineEdit { x: 1px; y: 1.5px; width: parent.width - 2px; height: parent.height - 2px; text <=> root.coturn-port; input-type: InputType.number; font-size: ImGuiFontStyle.body; }
                 LineEditFocusUnderlineMask { x: 5px; y: parent.height - 3px; width: parent.width - 10px; }
             }
-            Rectangle { x: 7px; y: 117px; width: parent.width - 14px; height: 1px; background: ImGuiLineStyle.separator; }
             CompactButton { x: root.compact-language ? 93px : 135px; y: 130px; primary: true; text: UiStrings.ok; clicked => { root.save-self-hosted-settings(); root.self-host-settings-open = false; } }
             CompactButton { x: root.compact-language ? 134px : 176px; y: 130px; width: root.compact-language ? 34px : 56px; text: UiStrings.cancel; clicked => { root.cancel-self-hosted-settings(); root.self-host-settings-open = false; } }
         }
@@ -1507,4 +1746,19 @@ export component MainWindow inherits Window {
             }
         }
     }
+    }
+
+    if root.custom-titlebar: Rectangle {
+        x: 0px;
+        y: 0px;
+        width: root.width;
+        height: root.height;
+        background: transparent;
+        border-width: 1px;
+        border-color: root.wayland-titlebar ? #aaa8a6 : #8b8b8b;
+        border-radius:
+            root.wayland-titlebar ? root.wayland-corner-radius : 0px;
+        z: 200;
+    }
+    }
 }

src/gui/ui/stream_window.slint

@@ -112,13 +112,16 @@ component ControlBarButton inherits Rectangle {
 export component StreamWindow inherits Window {
     title: "CrossDesk";
     preferred-width: 1280px;
-    preferred-height: 720px;
+    preferred-height: 720px + (root.custom-titlebar ? 32px : 0px);
     min-width: 640px;
-    min-height: 360px;
+    min-height: 360px + (root.custom-titlebar ? 32px : 0px);
-    no-frame: false;
+    no-frame: root.custom-titlebar;
-    background: black;
+    background: root.custom-titlebar ? transparent : black;
     default-font-size: ImGuiFontStyle.base;
 
+    in property <bool> custom-titlebar: false;
+    in property <bool> window-active: true;
+    in property <bool> window-maximized: false;
     in property <[StreamTab]> tabs;
     in-out property <int> selected-tab: 0;
     in property <image> frame;
@@ -153,9 +156,14 @@ export component StreamWindow inherits Window {
     callback toggle-stats;
     callback toggle-fullscreen;
     callback disconnect;
+    callback stream-title-drag(int, length, length);
+    callback minimize-stream-window;
+    callback toggle-maximize-stream-window;
+    callback close-stream-window;
     callback pointer-input(PointerEventButton, PointerEventKind, length, length);
     callback scroll-input(length, length, length, length);
     callback key-input(string, bool, bool, bool, bool, bool);
+    callback keyboard-focus-changed(bool);
 
     private property <bool> control-expanded: true;
     private property <bool> display-menu-open: false;
@@ -169,6 +177,9 @@ export component StreamWindow inherits Window {
     private property <length> control-press-x: 0px;
     private property <length> control-press-y: 0px;
     private property <int> dragging-tab: -1;
+    private property <length> titlebar-height:
+        root.custom-titlebar && !root.fullscreen-enabled ? 32px : 0px;
+    private property <length> window-corner-radius: 12px;
     callback begin-control-drag(length, length);
     callback move-control-drag(length, length);
     callback end-control-drag;
@@ -202,10 +213,167 @@ export component StreamWindow inherits Window {
         }
     }
 
-    Rectangle {
+    window-surface := Rectangle {
         width: root.width;
         height: root.height;
         background: black;
+        border-radius:
+            root.custom-titlebar && !root.fullscreen-enabled && !root.window-maximized
+                ? root.window-corner-radius : 0px;
+        clip: root.custom-titlebar && !root.fullscreen-enabled;
+
+        if root.custom-titlebar && !root.fullscreen-enabled: Rectangle {
+            x: 0px;
+            y: 0px;
+            width: parent.width;
+            height: root.titlebar-height;
+            background: #f6f5f4;
+            z: 100;
+
+            Text {
+                x: 120px;
+                width: parent.width - 240px;
+                height: parent.height;
+                text: "CrossDesk";
+                color: root.window-active ? #3d3d3d : #747474;
+                font-size: 12px;
+                font-weight: 600;
+                horizontal-alignment: center;
+                vertical-alignment: center;
+                overflow: elide;
+            }
+            stream-title-drag-area := TouchArea {
+                width: parent.width - 120px;
+                property <int> phase: self.pressed ? 1 : 0;
+                changed phase => {
+                    root.stream-title-drag(phase, self.mouse-x, self.mouse-y);
+                }
+                moved => {
+                    if (self.pressed) {
+                        root.stream-title-drag(2, self.mouse-x, self.mouse-y);
+                    }
+                }
+                double-clicked => {
+                    root.toggle-maximize-stream-window();
+                }
+            }
+            stream-minimize-button := Rectangle {
+                x: parent.width - 114px;
+                y: 4px;
+                width: 24px;
+                height: 24px;
+                border-radius: 12px;
+                background: stream-minimize-touch.pressed ? #c0bfbc
+                          : stream-minimize-touch.has-hover ? #deddda
+                          : root.window-active ? #e6e6e6
+                                               : transparent;
+                accessible-role: button;
+                accessible-label: "Minimize";
+                accessible-action-default => { stream-minimize-touch.clicked(); }
+                Rectangle {
+                    x: 8px;
+                    y: 13px;
+                    width: 8px;
+                    height: 0.75px;
+                    background: root.window-active
+                        || stream-minimize-touch.has-hover
+                        || stream-minimize-touch.pressed ? #454545 : #898989;
+                }
+                stream-minimize-touch := TouchArea {
+                    clicked => { root.minimize-stream-window(); }
+                }
+            }
+            stream-maximize-button := Rectangle {
+                x: parent.width - 74px;
+                y: 4px;
+                width: 24px;
+                height: 24px;
+                border-radius: 12px;
+                background: stream-maximize-touch.pressed ? #c0bfbc
+                          : stream-maximize-touch.has-hover ? #deddda
+                          : root.window-active ? #e6e6e6
+                                               : transparent;
+                accessible-role: button;
+                accessible-label: root.window-maximized ? "Restore" : "Maximize";
+                accessible-action-default => { stream-maximize-touch.clicked(); }
+                if !root.window-maximized: Rectangle {
+                    x: 8px;
+                    y: 8px;
+                    width: 8px;
+                    height: 8px;
+                    background: transparent;
+                    border-width: 1px;
+                    border-color: root.window-active
+                        || stream-maximize-touch.has-hover
+                        || stream-maximize-touch.pressed ? #454545 : #898989;
+                }
+                if root.window-maximized: Rectangle {
+                    x: 9px;
+                    y: 7px;
+                    width: 8px;
+                    height: 8px;
+                    background: transparent;
+                    border-width: 1px;
+                    border-color: root.window-active
+                        || stream-maximize-touch.has-hover
+                        || stream-maximize-touch.pressed ? #454545 : #898989;
+                }
+                if root.window-maximized: Rectangle {
+                    x: 7px;
+                    y: 9px;
+                    width: 8px;
+                    height: 8px;
+                    background: stream-maximize-button.background;
+                    border-width: 1px;
+                    border-color: root.window-active
+                        || stream-maximize-touch.has-hover
+                        || stream-maximize-touch.pressed ? #454545 : #898989;
+                }
+                stream-maximize-touch := TouchArea {
+                    clicked => { root.toggle-maximize-stream-window(); }
+                }
+            }
+            stream-close-button := Rectangle {
+                x: parent.width - 34px;
+                y: 4px;
+                width: 24px;
+                height: 24px;
+                border-radius: 12px;
+                background: stream-close-touch.pressed ? #b2161d
+                          : stream-close-touch.has-hover ? #e01b24
+                          : root.window-active ? #e6e6e6
+                                               : transparent;
+                accessible-role: button;
+                accessible-label: "Close";
+                accessible-action-default => { stream-close-touch.clicked(); }
+                Path {
+                    width: parent.width;
+                    height: parent.height;
+                    viewbox-width: 24;
+                    viewbox-height: 24;
+                    commands: "M 14.75 14.75 L 8.25 8.25 M 14.75 8.25 L 8.25 14.75";
+                    stroke: stream-close-touch.has-hover
+                        || stream-close-touch.pressed ? white
+                        : root.window-active ? #454545 : #898989;
+                    stroke-width: 1px;
+                }
+                stream-close-touch := TouchArea {
+                    clicked => { root.close-stream-window(); }
+                }
+            }
+            Rectangle {
+                y: parent.height - 1px;
+                height: 1px;
+                background: #d5d3d0;
+            }
+        }
+
+        content-layer := Rectangle {
+            y: root.titlebar-height;
+            width: parent.width;
+            height: parent.height - self.y;
+            background: black;
+            clip: true;
 
         // Keep the ImGui tab strip behavior, including pointer-drag reordering.
         Rectangle {
@@ -319,6 +487,8 @@ export component StreamWindow inherits Window {
 
             input-focus := FocusScope {
                 focus-on-click: true;
+                focus-gained => { root.keyboard-focus-changed(true); }
+                focus-lost => { root.keyboard-focus-changed(false); }
                 key-pressed(event) => {
                     root.key-input(event.text, true, event.modifiers.control, event.modifiers.alt, event.modifiers.shift, event.modifiers.meta);
                     accept
@@ -333,6 +503,9 @@ export component StreamWindow inherits Window {
                             && self.mouse-x <= control.x + control.width
                             && self.mouse-y >= control.y
                             && self.mouse-y <= control.y + control.height;
+                        if event.kind == PointerEventKind.down && !over-control {
+                            input-focus.focus();
+                        }
                         if event.kind == PointerEventKind.down
                             && event.button == PointerEventButton.left
                             && over-control {
@@ -341,7 +514,10 @@ export component StreamWindow inherits Window {
                             && (event.kind == PointerEventKind.up
                                 || event.kind == PointerEventKind.cancel) {
                             root.end-control-drag();
-                        } else if !root.control-dragging {
+                        // The control bar overlays the remote video. Events in
+                        // its full rectangle (including gaps between buttons)
+                        // are local UI input and must never reach the peer.
+                        } else if !root.control-dragging && !over-control {
                             root.pointer-input(event.button, event.kind, self.mouse-x, self.mouse-y);
                         }
                     }
@@ -645,5 +821,17 @@ export component StreamWindow inherits Window {
                 }
             }
         }
+        }
+
+        if root.custom-titlebar && !root.fullscreen-enabled: Rectangle {
+            width: parent.width;
+            height: parent.height;
+            background: transparent;
+            border-width: 1px;
+            border-color: #aaa8a6;
+            border-radius:
+                root.window-maximized ? 0px : root.window-corner-radius;
+            z: 200;
+        }
     }
 }

tests/connection_status_protocol_test.cpp

@@ -19,7 +19,7 @@ std::filesystem::path FindRepoRoot() {
   return {};
 }
 
-std::string ReadFile(const std::filesystem::path &path) {
+std::string ReadFile(const std::filesystem::path& path) {
   std::ifstream file(path, std::ios::binary);
   if (!file) {
     return {};
@@ -30,8 +30,8 @@ std::string ReadFile(const std::filesystem::path &path) {
   return stream.str();
 }
 
-bool ExpectContains(const char *name, const std::string &value,
+bool ExpectContains(const char* name, const std::string& value,
-                    const std::string &expected) {
+                    const std::string& expected) {
   if (value.find(expected) != std::string::npos) {
     return true;
   }
@@ -40,8 +40,8 @@ bool ExpectContains(const char *name, const std::string &value,
   return false;
 }
 
-bool ExpectNotContains(const char *name, const std::string &value,
+bool ExpectNotContains(const char* name, const std::string& value,
-                       const std::string &unexpected) {
+                       const std::string& unexpected) {
   if (value.find(unexpected) == std::string::npos) {
     return true;
   }
@@ -73,6 +73,10 @@ int main() {
       ReadFile(repo_root / "src/gui/runtime/remote_session.h");
   const std::string connection_runtime_cpp =
       ReadFile(repo_root / "src/gui/runtime/connection_runtime.cpp");
+  const std::string peer_event_handler_cpp =
+      ReadFile(repo_root / "src/gui/runtime/peer_event_handler.cpp");
+  const std::string application_state_h =
+      ReadFile(repo_root / "src/gui/application/application_state.h");
 
   bool ok = true;
   ok &= ExpectContains("minirtc.h", minirtc_api, "RemoteUnavailable");
@@ -81,6 +85,11 @@ int main() {
                        "\"Remote unavailable\"");
   ok &= ExpectContains("peer_connection.cpp", peer_connection,
                        "ConnectionStatus::RemoteUnavailable");
+  ok &= ExpectContains("peer_connection.cpp", peer_connection,
+                       "IsCurrentPeerConnection");
+  ok &= ExpectContains(
+      "peer_connection.cpp", peer_connection,
+      "on_connection_status_(ConnectionStatus::Closed, remote_user_id.data()");
   ok &= ExpectNotContains("peer_connection.cpp", peer_connection,
                           "\"Device offline\"");
   ok &= ExpectNotContains("peer_connection.cpp", peer_connection,
@@ -95,16 +104,30 @@ int main() {
                        "return localization::device_offline[language];");
   ok &= ExpectContains("runtime_state.h", runtime_state_h,
                        "pending_presence_probe_started_at_");
-  ok &= ExpectContains("remote_session.h", remote_session_h,
-                       "connection_attempt_started_at_");
   ok &= ExpectContains("connection_runtime.cpp", connection_runtime_cpp,
-                       "HandleConnectionTimeouts");
+                       "HandlePresenceProbeTimeout");
   ok &= ExpectContains("connection_runtime.cpp", connection_runtime_cpp,
                        "kPresenceProbeTimeout");
+  ok &= ExpectNotContains("remote_session.h", remote_session_h,
+                          "connection_attempt_started_at_");
+  ok &= ExpectNotContains("remote_session.h", remote_session_h,
+                          "connection_attempt_active_");
+  ok &= ExpectNotContains("connection_runtime.cpp", connection_runtime_cpp,
+                          "kConnectionAttemptTimeout");
+  ok &= ExpectNotContains("connection_runtime.cpp", connection_runtime_cpp,
+                          "ConnectionStatus::Failed");
+  ok &= ExpectContains("peer_event_handler.cpp", peer_event_handler_cpp,
+                       "props->connection_status_.store(status);");
+  ok &= ExpectContains("peer_event_handler.cpp", peer_event_handler_cpp,
+                       "case ConnectionStatus::Failed:");
   ok &= ExpectContains("connection_runtime.cpp", connection_runtime_cpp,
-                       "kConnectionAttemptTimeout");
+                       "HandleServerControllerDisconnected");
-  ok &= ExpectContains("connection_runtime.cpp", connection_runtime_cpp,
+  ok &= ExpectContains("peer_event_handler.cpp", peer_event_handler_cpp,
-                       "connection_attempt_started_at_");
+                       "HandleServerControllerDisconnected(remote_id");
+  ok &= ExpectNotContains("connection_runtime.cpp", connection_runtime_cpp,
+                          "ControllerHeartbeat");
+  ok &= ExpectContains("application_state.h", application_state_h,
+                       "std::atomic<bool> need_to_destroy_server_window_");
 
   return ok ? 0 : 1;
 }

tests/display_popup_hover_state_test.cpp

@@ -18,7 +18,7 @@ std::filesystem::path FindRepoRoot() {
   return {};
 }
 
-std::string ReadFile(const std::filesystem::path &path) {
+std::string ReadFile(const std::filesystem::path& path) {
   std::ifstream file(path, std::ios::binary);
   if (!file) {
     return {};
@@ -28,8 +28,8 @@ std::string ReadFile(const std::filesystem::path &path) {
   return stream.str();
 }
 
-bool ExpectContains(const char *name, const std::string &value,
+bool ExpectContains(const char* name, const std::string& value,
-                    const std::string &expected) {
+                    const std::string& expected) {
   if (value.find(expected) != std::string::npos) {
     return true;
   }
@@ -37,8 +37,8 @@ bool ExpectContains(const char *name, const std::string &value,
   return false;
 }
 
-bool ExpectNotContains(const char *name, const std::string &value,
+bool ExpectNotContains(const char* name, const std::string& value,
-                       const std::string &unexpected) {
+                       const std::string& unexpected) {
   if (value.find(unexpected) == std::string::npos) {
     return true;
   }
@@ -46,8 +46,8 @@ bool ExpectNotContains(const char *name, const std::string &value,
   return false;
 }
 
-bool ExpectContainsAtLeast(const char *name, const std::string &value,
+bool ExpectContainsAtLeast(const char* name, const std::string& value,
-                           const std::string &expected, size_t min_count) {
+                           const std::string& expected, size_t min_count) {
   size_t count = 0;
   size_t pos = 0;
   while ((pos = value.find(expected, pos)) != std::string::npos) {
@@ -62,7 +62,7 @@ bool ExpectContainsAtLeast(const char *name, const std::string &value,
   return false;
 }
 
-} // namespace
+}  // namespace
 
 int main() {
   const std::filesystem::path repo_root = FindRepoRoot();
@@ -84,14 +84,16 @@ int main() {
                        "root.shortcut-menu-open = false;");
   ok &= ExpectContains("stream_window.slint", stream,
                        "if root.display-menu-open: Rectangle");
-  ok &= ExpectContains("stream_window.slint", stream,
+  ok &=
-                       "display-touch.has-hover");
+      ExpectContains("stream_window.slint", stream, "display-touch.has-hover");
   ok &= ExpectContains("stream_window.slint", stream,
                        "root.switch-display(index)");
   ok &= ExpectContains("stream_window.slint", stream,
                        "if root.shortcut-menu-open: Rectangle");
+  ok &=
+      ExpectContains("stream_window.slint", stream, "shortcut-touch.has-hover");
   ok &= ExpectContains("stream_window.slint", stream,
-                       "shortcut-touch.has-hover");
+                       "} else if !root.control-dragging && !over-control {");
 
   ok &= ExpectContains("common.slint", common,
                        "if touch.has-hover && root.tooltip != \"\": Rectangle");
@@ -100,32 +102,38 @@ int main() {
                        "tooltip: StreamStrings.select-display");
   ok &= ExpectContains("stream_window.slint", stream,
                        "tooltip: StreamStrings.send-shortcut");
-  ok &= ExpectContains("stream_window.slint", stream,
+  ok &=
-                       "root.mouse-control-enabled ? StreamStrings.release-mouse : StreamStrings.control-mouse");
+      ExpectContains("stream_window.slint", stream,
-  ok &= ExpectContains("stream_window.slint", stream,
+                     "root.mouse-control-enabled ? StreamStrings.release-mouse "
-                       "root.audio-enabled ? StreamStrings.mute : StreamStrings.audio");
+                     ": StreamStrings.control-mouse");
+  ok &= ExpectContains(
+      "stream_window.slint", stream,
+      "root.audio-enabled ? StreamStrings.mute : StreamStrings.audio");
   ok &= ExpectContains("stream_window.slint", stream,
                        "tooltip: StreamStrings.select-file");
   ok &= ExpectContains("stream_window.slint", stream,
-                       "root.stats-visible ? StreamStrings.hide-stats : StreamStrings.show-stats");
+                       "root.stats-visible ? StreamStrings.hide-stats : "
-  ok &= ExpectContains("stream_window.slint", stream,
+                       "StreamStrings.show-stats");
-                       "root.fullscreen-enabled ? StreamStrings.exit-fullscreen : StreamStrings.fullscreen");
+  ok &=
+      ExpectContains("stream_window.slint", stream,
+                     "root.fullscreen-enabled ? StreamStrings.exit-fullscreen "
+                     ": StreamStrings.fullscreen");
   ok &= ExpectContains("stream_window.slint", stream,
                        "tooltip: StreamStrings.disconnect");
   ok &= ExpectContains("stream_window.slint", stream,
-                       "root.control-expanded ? StreamStrings.collapse-control : StreamStrings.expand-control");
+                       "root.control-expanded ? StreamStrings.collapse-control "
+                       ": StreamStrings.expand-control");
 
-  ok &= ExpectContains("gui_application.cpp", application,
+  ok &=
-                       "set_select_display(");
+      ExpectContains("gui_application.cpp", application, "set_select_display(");
-  ok &= ExpectContains("gui_application.cpp", application,
+  ok &= ExpectContains("gui_application.cpp", application, "set_show_stats(");
-                       "set_show_stats(");
+  ok &=
-  ok &= ExpectContains("gui_application.cpp", application,
+      ExpectContains("gui_application.cpp", application, "set_expand_control(");
-                       "set_expand_control(");
   ok &= ExpectContains("gui_application.cpp", application,
                        "set_collapse_control(");
   ok &= ExpectContains("gui_application.cpp", application,
                        "(*ui_->stream)->global<ui::StreamStrings>()");
-  ok &= ExpectNotContains("gui_application.cpp", application,
+  ok &=
-                          "#include <imgui");
+      ExpectNotContains("gui_application.cpp", application, "#include <imgui");
   return ok ? 0 : 1;
 }

tests/slint_ui_smoke_test.cpp

@@ -1,29 +1,109 @@
 #include "crossdesk_ui.h"
+#include "fa_solid_900.h"
 
 #include <cassert>
+#include <cstdlib>
+#include <fstream>
 #include <memory>
 #include <string>
 #include <vector>
 
+namespace {
+
+// Set the CROSSDESK_*_UI_SNAPSHOT variables while using Slint's software
+// renderer to export deterministic active and inactive visual-check images.
+bool WriteWindowSnapshot(const slint::Window &window, const char *path) {
+  const auto snapshot = window.take_snapshot();
+  if (!snapshot) {
+    return false;
+  }
+
+  std::ofstream output(path, std::ios::binary);
+  output << "P6\n"
+         << snapshot->width() << ' ' << snapshot->height() << "\n255\n";
+  for (const auto &pixel : *snapshot) {
+    output.put(static_cast<char>(pixel.r));
+    output.put(static_cast<char>(pixel.g));
+    output.put(static_cast<char>(pixel.b));
+  }
+  return output.good();
+}
+
+bool RegisterFontAwesome(slint::Window &window) {
+  return !window.window_handle()
+              .register_font_from_data(fa_solid_900_ttf,
+                                       fa_solid_900_ttf_len)
+              .has_value();
+}
+
+} // namespace
+
 int main() {
   auto window = crossdesk::ui::MainWindow::create();
   auto stream = crossdesk::ui::StreamWindow::create();
   auto server = crossdesk::ui::ServerWindow::create();
+  if (!RegisterFontAwesome(window->window()) ||
+      !RegisterFontAwesome(stream->window()) ||
+      !RegisterFontAwesome(server->window())) {
+    return 1;
+  }
   window->set_local_id("123 456 789");
   window->set_local_password("123456");
   window->set_connection_dialog_open(true);
   window->set_connection_password_required(true);
+  window->set_custom_titlebar(true);
+  window->set_wayland_titlebar(true);
   window->set_settings_session_active(true);
+  window->set_hardware_codec_available(false);
   window->set_portable_service_settings_visible(true);
   assert(std::string(window->get_local_id()) == "123 456 789");
   assert(window->get_connection_dialog_open());
   assert(window->get_connection_password_required());
+  assert(window->get_custom_titlebar());
+  assert(window->get_wayland_titlebar());
   assert(window->get_settings_session_active());
+  assert(!window->get_hardware_codec_available());
   assert(window->get_portable_service_settings_visible());
+  if (const char *snapshot_path =
+          std::getenv("CROSSDESK_MAIN_UI_SNAPSHOT")) {
+    window->show();
+    const bool snapshot_written =
+        WriteWindowSnapshot(window->window(), snapshot_path);
+    window->hide();
+    if (!snapshot_written) {
+      return 2;
+    }
+  }
+  if (const char *snapshot_path =
+          std::getenv("CROSSDESK_MAIN_INACTIVE_UI_SNAPSHOT")) {
+    window->set_window_active(false);
+    window->show();
+    const bool snapshot_written =
+        WriteWindowSnapshot(window->window(), snapshot_path);
+    window->hide();
+    window->set_window_active(true);
+    if (!snapshot_written) {
+      return 3;
+    }
+  }
   window->set_settings_open(true);
   window->set_about_open(true);
   assert(window->get_settings_open());
   assert(window->get_about_open());
+  if (const char *snapshot_path =
+          std::getenv("CROSSDESK_SETTINGS_UI_SNAPSHOT")) {
+    window->set_about_open(false);
+    window->set_connection_dialog_open(false);
+    window->show();
+    const bool snapshot_written =
+        WriteWindowSnapshot(window->window(), snapshot_path);
+    window->hide();
+    if (!snapshot_written) {
+      return 6;
+    }
+    window->set_connection_dialog_open(true);
+    window->set_about_open(true);
+  }
   window->set_remote_id_input("987654321");
   window->invoke_reset_remote_id();
   assert(std::string(window->get_remote_id_input()).empty());
@@ -62,7 +142,37 @@ int main() {
   stream->set_tabs(
       std::make_shared<slint::VectorModel<crossdesk::ui::StreamTab>>(
           std::vector{tab}));
+  stream->set_custom_titlebar(true);
+  stream->set_window_maximized(true);
   assert(stream->get_tabs()->row_count() == 1);
+  assert(stream->get_custom_titlebar());
+  assert(stream->get_window_maximized());
+  if (const char *snapshot_path =
+          std::getenv("CROSSDESK_STREAM_UI_SNAPSHOT")) {
+    stream->set_window_maximized(false);
+    stream->show();
+    const bool snapshot_written =
+        WriteWindowSnapshot(stream->window(), snapshot_path);
+    stream->hide();
+    stream->set_window_maximized(true);
+    if (!snapshot_written) {
+      return 4;
+    }
+  }
+  if (const char *snapshot_path =
+          std::getenv("CROSSDESK_STREAM_INACTIVE_UI_SNAPSHOT")) {
+    stream->set_window_maximized(false);
+    stream->set_window_active(false);
+    stream->show();
+    const bool snapshot_written =
+        WriteWindowSnapshot(stream->window(), snapshot_path);
+    stream->hide();
+    stream->set_window_active(true);
+    stream->set_window_maximized(true);
+    if (!snapshot_written) {
+      return 5;
+    }
+  }
 
   bool tab_reordered = false;
   stream->on_reorder_tab([&](int index, float x, float width) {
@@ -71,6 +181,32 @@ int main() {
   stream->invoke_reorder_tab(0, 120.0f, 110.0f);
   assert(tab_reordered);
 
+  bool maximize_requested = false;
+  stream->on_toggle_maximize_stream_window(
+      [&] { maximize_requested = true; });
+  stream->invoke_toggle_maximize_stream_window();
+  assert(maximize_requested);
+
+  bool keyboard_focus_changed = false;
+  bool keyboard_input_received = false;
+  stream->on_keyboard_focus_changed(
+      [&](bool focused) { keyboard_focus_changed = focused; });
+  stream->on_key_input(
+      [&](slint::SharedString text, bool pressed, bool, bool, bool, bool) {
+        keyboard_input_received = std::string(text) == "a" && pressed;
+      });
+  stream->window().set_size(
+      slint::LogicalSize(slint::Size<float>{1280.0f, 720.0f}));
+  stream->window().dispatch_pointer_press_event(
+      slint::LogicalPosition(slint::Point<float>{640.0f, 360.0f}),
+      slint::PointerEventButton::Left);
+  stream->window().dispatch_pointer_release_event(
+      slint::LogicalPosition(slint::Point<float>{640.0f, 360.0f}),
+      slint::PointerEventButton::Left);
+  stream->window().dispatch_key_press_event("a");
+  assert(keyboard_focus_changed);
+  assert(keyboard_input_received);
+
   crossdesk::ui::FileTransferEntry transfer;
   transfer.name = "archive.zip";
   transfer.status = "Sending";

tests/video_callback_lifetime_test.cpp

@@ -0,0 +1,120 @@
+#include <filesystem>
+#include <fstream>
+#include <iostream>
+#include <sstream>
+#include <string>
+
+namespace {
+
+std::filesystem::path FindRepoRoot() {
+  std::filesystem::path current = std::filesystem::current_path();
+  while (!current.empty()) {
+    if (std::filesystem::exists(current / "xmake.lua") &&
+        std::filesystem::exists(
+            current / "submodules/minirtc/src/transport/ice_transport_controller.cpp")) {
+      return current;
+    }
+    current = current.parent_path();
+  }
+  return {};
+}
+
+std::string ReadFile(const std::filesystem::path& path) {
+  std::ifstream file(path, std::ios::binary);
+  if (!file) {
+    return {};
+  }
+
+  std::ostringstream stream;
+  stream << file.rdbuf();
+  return stream.str();
+}
+
+std::string ExtractSection(const std::string& source, const std::string& begin,
+                           const std::string& end) {
+  const size_t begin_pos = source.find(begin);
+  if (begin_pos == std::string::npos) {
+    return {};
+  }
+  const size_t end_pos = source.find(end, begin_pos + begin.size());
+  if (end_pos == std::string::npos) {
+    return {};
+  }
+  return source.substr(begin_pos, end_pos - begin_pos);
+}
+
+bool ExpectContains(const char* name, const std::string& value,
+                    const std::string& expected) {
+  if (value.find(expected) != std::string::npos) {
+    return true;
+  }
+
+  std::cerr << name << " missing expected text: " << expected << "\n";
+  return false;
+}
+
+bool ExpectNotContains(const char* name, const std::string& value,
+                       const std::string& unexpected) {
+  if (value.find(unexpected) == std::string::npos) {
+    return true;
+  }
+
+  std::cerr << name << " contains unsafe text: " << unexpected << "\n";
+  return false;
+}
+
+}  // namespace
+
+int main() {
+  const std::filesystem::path repo_root = FindRepoRoot();
+  if (repo_root.empty()) {
+    std::cerr << "failed to locate repository root\n";
+    return 1;
+  }
+
+  const std::string controller = ReadFile(
+      repo_root /
+      "submodules/minirtc/src/transport/ice_transport_controller.cpp");
+  const std::string destroy = ExtractSection(
+      controller, "void IceTransportController::Destroy()",
+      "uint32_t IceTransportController::AddVideoSendChannel");
+  const std::string send_video = ExtractSection(
+      controller, "int IceTransportController::SendVideo(",
+      "void IceTransportController::MaybeDegradeResolutionOnEncodeTime");
+  const std::string on_video_encoded = ExtractSection(
+      controller, "int IceTransportController::OnVideoEncoded(",
+      "int IceTransportController::SendAudio(");
+
+  bool ok = true;
+  ok &= ExpectContains("Destroy", destroy,
+                       "std::unique_lock lock(stream_senders_mutex_);");
+  ok &= ExpectContains("Destroy", destroy,
+                       "senders.swap(stream_senders_);");
+  ok &= ExpectContains("Destroy", destroy,
+                       "codecs.push_back(std::move(context->codec));");
+  ok &= ExpectContains("Destroy", destroy, "senders.clear();");
+  ok &= ExpectContains("Destroy", destroy, "codecs.clear();");
+  ok &= ExpectNotContains("Destroy", destroy,
+                          "std::shared_lock lock(stream_senders_mutex_);");
+
+  ok &= ExpectContains("SendVideo", send_video,
+                       "std::weak_ptr<IceTransportController> weak_self");
+  ok &= ExpectContains("SendVideo", send_video,
+                       "std::weak_ptr<StreamContext> weak_context");
+  ok &= ExpectContains(
+      "SendVideo", send_video,
+      "[weak_self, weak_context, channel_name, queue_delay_ms");
+  ok &= ExpectContains("SendVideo", send_video,
+                       "return self->OnVideoEncoded(");
+  ok &= ExpectNotContains("SendVideo", send_video,
+                          "[this, channel_name, context");
+
+  ok &= ExpectContains("OnVideoEncoded", on_video_encoded,
+                       "if (!is_running_.load())");
+  ok &= ExpectContains("OnVideoEncoded", on_video_encoded,
+                       "std::shared_lock lock(stream_senders_mutex_);");
+  ok &= ExpectContains("OnVideoEncoded", on_video_encoded,
+                       "it->second != context");
+
+  return ok ? 0 : 1;
+}

thirdparty/rust/xmake.lua

@@ -0,0 +1,35 @@
+package("rust")
+    set_kind("toolchain")
+    set_homepage("https://rust-lang.org")
+    set_description("Rust is a general-purpose programming language emphasizing performance, type safety, and concurrency.")
+
+    add_versions("1.92.0", "")
+
+    add_deps("ca-certificates", {host = true, private = true})
+    add_deps("rustup", {host = true, private = true, system = false})
+
+    on_install(function(package)
+        import("core.tools.rustc.target_triple")
+
+        local host_target = assert(target_triple(package:plat(), package:arch()),
+            "failed to determine the Rust host target triple")
+        local version = package:version():shortstr()
+        local toolchain_name = version .. "-" .. host_target
+        local rustup_home = assert(os.getenv("RUSTUP_HOME"), "cannot find rustup home")
+
+        os.vrunv("rustup", {"install", "--no-self-update", toolchain_name})
+        os.vmv(path.join(rustup_home, "toolchains", toolchain_name, "*"), package:installdir())
+
+        -- Keep the Xmake-managed toolchain isolated from rustup after installation.
+        os.vrm(path.join(rustup_home, "toolchains", toolchain_name))
+        os.vrm(path.join(rustup_home, "update-hashes", toolchain_name))
+
+        package:addenv("RC", "bin/rustc" .. (is_host("windows") and ".exe" or ""))
+        package:mark_as_pathenv("RC")
+    end)
+
+    on_test(function(package)
+        os.vrun("cargo --version")
+        os.vrun("rustc --version")
+    end)
+package_end()

thirdparty/slint/xmake.lua

@@ -10,6 +10,7 @@ package("slint")
     add_configs("shared", {description = "Build the Slint runtime as a shared library", default = true, type = "boolean", readonly = true})
 
     add_deps("cmake")
+    add_deps("rust 1.92.0", {host = true, private = true, system = false})
 
     on_load(function(package)
         package:add("includedirs", "include/slint")

thirdparty/xmake.lua

@@ -1 +1 @@
-includes("cpp-httplib", "slint")
+includes("cpp-httplib", "rust", "slint")

xmake/targets.lua

@@ -3,6 +3,22 @@ function setup_targets()
 
     includes("submodules", "thirdparty")
 
+    local function copy_slint_runtime(target)
+        if not target:is_plat("windows") then
+            return
+        end
+
+        local slint = target:pkg("slint")
+        if not slint and target:dep("gui") then
+            slint = target:dep("gui"):pkg("slint")
+        end
+        assert(slint, "the Slint package is required to copy its Windows runtime")
+        local runtime_dir = path.join(slint:installdir(), "lib")
+        local runtime_dll = path.join(runtime_dir, "slint_cpp.dll")
+        assert(os.isfile(runtime_dll), "Slint runtime not found: " .. runtime_dll)
+        os.cp(runtime_dll, target:targetdir())
+    end
+
     local crossdesk_windows_resource = "scripts/windows/crossdesk.rc"
     if is_config("CROSSDESK_PORTABLE", true) then
         crossdesk_windows_resource = "scripts/windows/crossdesk_portable.rc"
@@ -57,6 +73,11 @@ function setup_targets()
         set_default(false)
         add_files("tests/connection_status_protocol_test.cpp")
 
+    target("video_callback_lifetime_test")
+        set_kind("binary")
+        set_default(false)
+        add_files("tests/video_callback_lifetime_test.cpp")
+
     target("windows_manifest_resource_test")
         set_kind("binary")
         set_default(false)
@@ -87,10 +108,15 @@ function setup_targets()
         set_kind("binary")
         set_languages("c++20")
         set_default(false)
+        if is_os("windows") then
+            add_cxxflags("/bigobj")
+        end
         add_packages("slint")
+        add_includedirs("src/gui/assets/fonts")
         add_rules("slint")
         add_files("src/gui/ui/crossdesk_ui.slint")
         add_files("tests/slint_ui_smoke_test.cpp")
+        after_build(copy_slint_runtime)
 
     target("version_checker_test")
         set_kind("binary")
@@ -296,4 +322,5 @@ function setup_targets()
             add_deps("wgc_plugin", "crossdesk_service", "crossdesk_session_helper")
             add_files(crossdesk_windows_resource)
         end
+        after_build(copy_slint_runtime)
 end