Add Qt/QML desktop shell and Nebula.UI

Introduce a new production desktop shell at `shells/desktop/shell` built with C++20, Qt Quick/QML, and LayerShellQt, including top bar, launcher, desktop surfaces, shell state, and mock app data. Add the shared `packages/nebula-ui` QML module (theme, controls, focus, icons) and wire it into the shell build. Retire the old GTK/WebKit native host by removing `shells/desktop/native`, move the React shell UI to `shells/desktop/prototype-react` as an archived design reference, and update root/compositor/session documentation to reflect the new Linux-only production architecture and temporary Sway role.
2026-08-26 16:34:40 +12:00
parent 5504d3cfb8
commit befed8ff96
80 changed files with 2128 additions and 609 deletions
@@ -0,0 +1,98 @@
+cmake_minimum_required(VERSION 3.20)
+
+if(NOT CMAKE_SYSTEM_NAME STREQUAL "Linux")
+    message(FATAL_ERROR
+        "nebula-shell is a Linux Wayland shell using LayerShellQt.\n"
+        "Build and run it on the Ubuntu NebulaOS VM. Windows is not a supported target, "
+        "and LayerShellQt is not stubbed with other platform APIs.")
+endif()
+
+project(nebula-shell LANGUAGES CXX)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
+find_package(Qt6 6.4 REQUIRED COMPONENTS Core Gui Qml Quick)
+find_package(LayerShellQt REQUIRED)
+
+qt_standard_project_setup(REQUIRES 6.4)
+
+set(QT_QML_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/qml")
+
+add_subdirectory(
+    "${CMAKE_CURRENT_SOURCE_DIR}/../../../packages/nebula-ui"
+    "${CMAKE_CURRENT_BINARY_DIR}/nebula-ui"
+)
+
+qt_add_executable(nebula-shell
+    src/main.cpp
+)
+
+set(NEBULA_SHELL_QML_FILES
+    qml/Main.qml
+    qml/ShellState.qml
+    qml/surfaces/DesktopSurface.qml
+    qml/surfaces/TopBarSurface.qml
+    qml/surfaces/LauncherSurface.qml
+    qml/components/TopBar.qml
+    qml/components/NebulaButton.qml
+    qml/components/Clock.qml
+    qml/components/SystemArea.qml
+    qml/components/Launcher.qml
+    qml/components/AppItem.qml
+    qml/mock/MockApps.qml
+)
+
+foreach(qml_file IN LISTS NEBULA_SHELL_QML_FILES)
+    get_filename_component(qml_name "${qml_file}" NAME)
+    set_source_files_properties("${qml_file}" PROPERTIES
+        QT_RESOURCE_ALIAS "${qml_name}"
+    )
+endforeach()
+
+set_source_files_properties(qml/ShellState.qml PROPERTIES
+    QT_QML_SINGLETON_TYPE TRUE
+    QT_RESOURCE_ALIAS ShellState.qml
+)
+set_source_files_properties(qml/mock/MockApps.qml PROPERTIES
+    QT_QML_SINGLETON_TYPE TRUE
+    QT_RESOURCE_ALIAS MockApps.qml
+)
+
+qt_add_qml_module(nebula-shell
+    URI Nebula.Shell
+    VERSION 1.0
+    RESOURCE_PREFIX /qt/qml
+    QML_FILES ${NEBULA_SHELL_QML_FILES}
+    DEPENDENCIES
+        QtQuick
+        Nebula.UI
+)
+
+target_link_libraries(nebula-shell
+    PRIVATE
+        Qt6::Core
+        Qt6::Gui
+        Qt6::Qml
+        Qt6::Quick
+        LayerShellQt::Interface
+        NebulaUI
+)
+
+if(TARGET NebulaUIplugin)
+    target_link_libraries(nebula-shell PRIVATE NebulaUIplugin)
+endif()
+
+set_target_properties(nebula-shell PROPERTIES
+    OUTPUT_NAME nebula-shell
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}"
+)
+
+if(COMMAND qt_import_qml_plugins)
+    qt_import_qml_plugins(nebula-shell)
+endif()
+
+if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
+    target_compile_options(nebula-shell PRIVATE -Wall -Wextra)
+endif()