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path: root/src/client/Qt6WaylandClientMacros.cmake
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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: BSD-3-Clause

function(qt6_generate_wayland_protocol_client_sources target)
    cmake_parse_arguments(arg "NO_INCLUDE_CORE_ONLY" "__QT_INTERNAL_WAYLAND_INCLUDE_DIR" "FILES" ${ARGN})
    if(DEFINED arg_UNPARSED_ARGUMENTS)
        message(FATAL_ERROR "Unknown arguments were passed to qt6_generate_wayland_protocol_client_sources: (${arg_UNPARSED_ARGUMENTS}).")
    endif()

    get_target_property(target_binary_dir ${target} BINARY_DIR)

    if(NOT TARGET Wayland::Scanner)
        message(FATAL_ERROR "Wayland::Scanner target not found. You might be missing the WaylandScanner CMake package.")
    endif()

    if(NOT TARGET Qt6::qtwaylandscanner)
        message(FATAL_ERROR "qtwaylandscanner executable not found. Most likely there is an issue with your Qt installation.")
    endif()

    string(TOUPPER "${target}" module_define_infix)
    string(REPLACE "-" "_" module_define_infix "${module_define_infix}")
    string(REPLACE "." "_" module_define_infix "${module_define_infix}")
    set(build_macro "QT_BUILD_${module_define_infix}_LIB")

    foreach(protocol_file IN LISTS arg_FILES)
        get_filename_component(protocol_name "${protocol_file}" NAME_WLE)

        set(waylandscanner_header_output "${target_binary_dir}/wayland-${protocol_name}-client-protocol.h")
        set(waylandscanner_code_output "${target_binary_dir}/wayland-${protocol_name}-protocol.c")
        # TODO: Maybe add "client" prefix or suffix to these in Qt6?
        set(qtwaylandscanner_header_output "${target_binary_dir}/qwayland-${protocol_name}.h")
        set(qtwaylandscanner_code_output "${target_binary_dir}/qwayland-${protocol_name}.cpp")

        if (NOT arg_NO_INCLUDE_CORE_ONLY)
            set(waylandscanner_extra_args "--include-core-only")
        endif()
        add_custom_command(
            OUTPUT "${waylandscanner_header_output}"
            #TODO: Maybe put the files in ${CMAKE_CURRENT_BINARY_DIR/wayland_generated instead?
            COMMAND Wayland::Scanner --strict ${waylandscanner_extra_args} client-header < "${protocol_file}" > "${waylandscanner_header_output}"
            DEPENDS ${protocol_file} Wayland::Scanner
        )

        add_custom_command(
            OUTPUT "${waylandscanner_code_output}"
            COMMAND Wayland::Scanner --strict ${waylandscanner_extra_args} public-code < "${protocol_file}" > "${waylandscanner_code_output}"
            DEPENDS ${protocol_file} Wayland::Scanner
        )

        set(wayland_include_dir "")
        if(arg___QT_INTERNAL_WAYLAND_INCLUDE_DIR)
            set(wayland_include_dir "${arg___QT_INTERNAL_WAYLAND_INCLUDE_DIR}")
        else()
            get_target_property(qt_module ${target} _qt_module_interface_name)
            get_target_property(is_for_module "${target}" _qt_module_has_headers)
            if (qt_module)
                set(wayland_include_dir "Qt${qt_module}/private")
            elseif (is_for_module)
                set(wayland_include_dir "QtWaylandClient/private")
            endif()
        endif()

        add_custom_command(
            OUTPUT "${qtwaylandscanner_header_output}"
            COMMAND Qt6::qtwaylandscanner client-header
                "${protocol_file}"
                --build-macro=${build_macro}
                --header-path="${wayland_include_dir}"
                > "${qtwaylandscanner_header_output}"
            DEPENDS ${protocol_file} Qt6::qtwaylandscanner
        )

        set(qtwaylandscanner_code_include "")
        if (is_for_module)
            set(qtwaylandscanner_code_include "<QtWaylandClient/private/wayland-wayland-client-protocol.h>")
        endif()

        add_custom_command(
            OUTPUT "${qtwaylandscanner_code_output}"
            COMMAND Qt6::qtwaylandscanner client-code
                "${protocol_file}"
                --build-macro=${build_macro}
                --header-path='${wayland_include_dir}'
                --add-include='${qtwaylandscanner_code_include}'
                > "${qtwaylandscanner_code_output}"
            DEPENDS ${protocol_file} Qt6::qtwaylandscanner
        )

        set(sources "${waylandscanner_header_output}"
            "${waylandscanner_code_output}"
            "${qtwaylandscanner_header_output}"
            "${qtwaylandscanner_code_output}")

        target_sources(${target} PRIVATE ${sources})

        set_source_files_properties(${sources} PROPERTIES SKIP_UNITY_BUILD_INCLUSION ON)
    endforeach()
    target_include_directories(${target} PRIVATE ${target_binary_dir})
endfunction()

if(NOT QT_NO_CREATE_VERSIONLESS_FUNCTIONS)
    function(qt_generate_wayland_protocol_client_sources)
        qt6_generate_wayland_protocol_client_sources(${ARGV})
    endfunction()
endif()