# SPDX-FileCopyrightText: 2012-2014 Pier Luigi Fiorini <pierluigi.fiorini@gmail.com>
#
# SPDX-License-Identifier: BSD-3-Clause

#[=======================================================================[.rst:
FindQtWaylandScanner
--------------------

Try to find qtwaylandscanner.

If the qtwaylandscanner executable is not in your PATH, you can provide
an alternative name or full path location with the ``QtWaylandScanner_EXECUTABLE``
variable.

This will define the following variables:

``QtWaylandScanner_FOUND``
    True if qtwaylandscanner is available

``QtWaylandScanner_EXECUTABLE``
    The qtwaylandscanner executable.

If ``QtWaylandScanner_FOUND`` is TRUE, it will also define the following imported
target:

``Wayland::QtScanner``
    The qtwaylandscanner executable.

This module provides the following functions to generate C++ protocol
implementations:

  - ``ecm_add_qtwayland_client_protocol``
  - ``ecm_add_qtwayland_server_protocol``

::

  ecm_add_qtwayland_client_protocol(<target>
                                    PROTOCOL <xmlfile>
                                    BASENAME <basename>
                                    [PREFIX <prefix>])

  ecm_add_qtwayland_client_protocol(<source_files_var>
                                    PROTOCOL <xmlfile>
                                    BASENAME <basename>
                                    [PREFIX <prefix>])

Generate C++ wrapper to Wayland client protocol files from ``<xmlfile>``
XML definition for the ``<basename>`` interface and append those files
to ``<source_files_var>`` or ``<target>``.  Pass the ``<prefix>`` argument if the interface
names don't start with ``qt_`` or ``wl_``.

WaylandScanner is required and will be searched for.

::

  ecm_add_qtwayland_server_protocol(<target>
                                    PROTOCOL <xmlfile>
                                    BASENAME <basename>
                                    [PREFIX <prefix>])

  ecm_add_qtwayland_server_protocol(<source_files_var>
                                    PROTOCOL <xmlfile>
                                    BASENAME <basename>
                                    [PREFIX <prefix>])

Generate C++ wrapper to Wayland server protocol files from ``<xmlfile>``
XML definition for the ``<basename>`` interface and append those files
to ``<source_files_var>`` or ``<target>``.  Pass the ``<prefix>`` argument if the interface
names don't start with ``qt_`` or ``wl_``.

WaylandScanner is required and will be searched for.

Since 1.4.0.
#]=======================================================================]

include(${CMAKE_CURRENT_LIST_DIR}/ECMFindModuleHelpersStub.cmake)
include("${ECM_MODULE_DIR}/ECMQueryQt.cmake")

ecm_find_package_version_check(QtWaylandScanner)

ecm_query_qt(qt_binaries_dir QT_HOST_BINS)

# Find qtwaylandscanner
find_program(QtWaylandScanner_EXECUTABLE NAMES qtwaylandscanner HINTS ${qt_binaries_dir})

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(QtWaylandScanner
    FOUND_VAR
        QtWaylandScanner_FOUND
    REQUIRED_VARS
        QtWaylandScanner_EXECUTABLE
)

mark_as_advanced(QtWaylandScanner_EXECUTABLE)

if(NOT TARGET Wayland::QtScanner AND QtWaylandScanner_FOUND)
    add_executable(Wayland::QtScanner IMPORTED)
    set_target_properties(Wayland::QtScanner PROPERTIES
        IMPORTED_LOCATION "${QtWaylandScanner_EXECUTABLE}"
    )
endif()

include(FeatureSummary)
set_package_properties(QtWaylandScanner PROPERTIES
    URL "https://qt.io/"
    DESCRIPTION "Executable that converts XML protocol files to C++ code"
)


include(CMakeParseArguments)

function(ecm_add_qtwayland_client_protocol target_or_sources_var)
    # Parse arguments
    set(oneValueArgs PROTOCOL BASENAME PREFIX)
    cmake_parse_arguments(ARGS "" "${oneValueArgs}" "" ${ARGN})

    if(ARGS_UNPARSED_ARGUMENTS)
        message(FATAL_ERROR "Unknown keywords given to ecm_add_qtwayland_client_protocol(): \"${ARGS_UNPARSED_ARGUMENTS}\"")
    endif()

    set(_prefix "${ARGS_PREFIX}")

    find_package(WaylandScanner REQUIRED QUIET)
    ecm_add_wayland_client_protocol(${target_or_sources_var}
                                    PROTOCOL ${ARGS_PROTOCOL}
                                    BASENAME ${ARGS_BASENAME})

    get_filename_component(_infile ${ARGS_PROTOCOL} ABSOLUTE)
    set(_header "${CMAKE_CURRENT_BINARY_DIR}/qwayland-${ARGS_BASENAME}.h")
    set(_code "${CMAKE_CURRENT_BINARY_DIR}/qwayland-${ARGS_BASENAME}.cpp")

    set_source_files_properties(${_header} ${_code} GENERATED)

    add_custom_command(OUTPUT "${_header}"
        COMMAND ${QtWaylandScanner_EXECUTABLE} client-header ${_infile} "" ${_prefix} > ${_header}
        DEPENDS ${_infile} ${_cheader} VERBATIM)

    add_custom_command(OUTPUT "${_code}"
        COMMAND ${QtWaylandScanner_EXECUTABLE} client-code ${_infile} "" ${_prefix} > ${_code}
        DEPENDS ${_infile} ${_header} VERBATIM)

    set_property(SOURCE ${_header} ${_code} PROPERTY SKIP_AUTOMOC ON)

    if (TARGET ${target_or_sources_var})
        target_sources(${target_or_sources_var} PRIVATE "${_code}")
    else()
        list(APPEND ${target_or_sources_var} "${_code}")
        set(${target_or_sources_var} ${${target_or_sources_var}} PARENT_SCOPE)
    endif()
endfunction()


function(ecm_add_qtwayland_server_protocol target_or_sources_var)
    # Parse arguments
    set(oneValueArgs PROTOCOL BASENAME PREFIX)
    cmake_parse_arguments(ARGS "" "${oneValueArgs}" "" ${ARGN})

    if(ARGS_UNPARSED_ARGUMENTS)
        message(FATAL_ERROR "Unknown keywords given to ecm_add_qtwayland_server_protocol(): \"${ARGS_UNPARSED_ARGUMENTS}\"")
    endif()

    set(_prefix "${ARGS_PREFIX}")

    find_package(WaylandScanner REQUIRED QUIET)
    ecm_add_wayland_server_protocol(${target_or_sources_var}
                                    PROTOCOL ${ARGS_PROTOCOL}
                                    BASENAME ${ARGS_BASENAME})

    get_filename_component(_infile ${ARGS_PROTOCOL} ABSOLUTE)
    set(_header "${CMAKE_CURRENT_BINARY_DIR}/qwayland-server-${ARGS_BASENAME}.h")
    set(_code "${CMAKE_CURRENT_BINARY_DIR}/qwayland-server-${ARGS_BASENAME}.cpp")

    set_source_files_properties(${_header} ${_code} GENERATED)

    add_custom_command(OUTPUT "${_header}"
        COMMAND ${QtWaylandScanner_EXECUTABLE} server-header ${_infile} "" ${_prefix} > ${_header}
        DEPENDS ${_infile} VERBATIM)

    add_custom_command(OUTPUT "${_code}"
        COMMAND ${QtWaylandScanner_EXECUTABLE} server-code ${_infile} "" ${_prefix} > ${_code}
        DEPENDS ${_infile} ${_header} VERBATIM)

    set_property(SOURCE ${_header} ${_code} PROPERTY SKIP_AUTOMOC ON)

    if (TARGET ${target_or_sources_var})
        target_sources(${target_or_sources_var} PRIVATE "${_code}")
    else()
        list(APPEND ${target_or_sources_var} "${_code}")
        set(${target_or_sources_var} ${${target_or_sources_var}} PARENT_SCOPE)
    endif()
endfunction()
