#################################################
#                                               #
#  Auxiliary macros for TQt                     #
#                                               #
#################################################

include( TDEMacros )


#################################################
#####
##### tqt_install_includes
#####
##### The macro is used to determine the headers that are installed,
##### while the symlinks in the binary include directory are created.
#####
##### Syntax:
#####   tqt_install_includes(
#####     [FILES] include_name [include_name]
#####     [DESTINATION subdir]
#####     [ONLY_SYMLINK]
#####   )

macro( tqt_install_includes )

  unset( _files )
  unset( _dest )
  unset( _only_symlink )
  set( _var _files )

  foreach( _arg ${ARGN} )

    # found directive "FILES"
    if( "+${_arg}" STREQUAL "+FILES" )
      unset( _files )
      set( _var _files )
      set( _directive 1 )
    endif( )

    # found directive "DESTINATION"
    if( "+${_arg}" STREQUAL "+DESTINATION" )
      unset( _dest )
      set( _var _dest )
      set( _directive 1 )
    endif( )

    # found directive "ONLY_SYMLINK"
    if( "+${_arg}" STREQUAL "+ONLY_SYMLINK" )
      unset( _var )
      set( _only_symlink 1 )
      set( _directive 1 )
    endif( )

    # collect data
    if( _directive )
      unset( _directive )
    elseif( _var )
      list( APPEND ${_var} ${_arg} )
    endif( )

  endforeach( )

  # determine destination directory
  if( NOT IS_ABSOLUTE( "${_dest}" ) )
    set( _dest "${QT_INSTALL_HEADERS}/${_dest}" )
  endif()
  file( RELATIVE_PATH _dest_sub "${QT_INSTALL_HEADERS}" "${_dest}" )
  file( MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/include/${_dest_sub}" )

  # process files
  foreach( _file IN LISTS _files )
    if( NOT TARGET tqt-includes )
      add_custom_target( tqt-includes
        WORKING_DIRECTORY "${CMAKE_BINARY_DIR}"
        COMMENT "Prepare includes..." )
    endif()

    get_filename_component( _source_name "${_file}" NAME )
    get_filename_component( _source_file "${_file}" ABSOLUTE )
    file( RELATIVE_PATH _target_name "${CMAKE_SOURCE_DIR}" "${_source_file}" )
    string( REPLACE "/" "+" _target_name "${_target_name}" )

    file( RELATIVE_PATH _link_source "${CMAKE_BINARY_DIR}/include/${_dest_sub}" ${_source_file} )
    file( RELATIVE_PATH _link_dest "${QT_INSTALL_HEADERS}" "${_dest}/${_source_name}" )

    if( NOT TARGET ${_target_name} )
      add_custom_command(
        OUTPUT ${CMAKE_BINARY_DIR}/include/${_link_dest}
        COMMAND
          ${CMAKE_COMMAND} -E create_symlink
          ${_link_source} ${CMAKE_BINARY_DIR}/include/${_link_dest}
        COMMENT "Include file ${_link_dest}"
      )
      add_custom_target( ${_target_name}
        DEPENDS ${CMAKE_BINARY_DIR}/include/${_link_dest}
      )
      add_dependencies( tqt-includes ${_target_name} )
    endif()

    if( NOT "${_only_symlink}" )
      install( FILES ${_file} DESTINATION ${_dest} )
    endif()
  endforeach( _file )

endmacro( tqt_install_includes )


#################################################
#####
##### tqt_automoc
#####
##### The macro is used for 'moc' processing specifically for TQt as such
##### and adding them to an existing target.
#####
##### Syntax:
#####   tqt_moc(
#####     [TARGET] target
#####     [INCLUDES include_name [include_name]]
#####   )

macro( tqt_automoc )

  unset( _target )
  set( _includes AUTO )
  set( _var _target )

  foreach( _arg ${ARGN} )

    # found directive "TARGET"
    if( "+${_arg}" STREQUAL "+TARGET" )
      unset( _target )
      set( _var _target )
      set( _directive 1 )
    endif( )

    # found directive "INCLUDES"
    if( "+${_arg}" STREQUAL "+INCLUDES" )
      unset( _includes )
      set( _var _includes )
      set( _directive 1 )
    endif( )

    # collect data
    if( _directive )
      unset( _directive )
    elseif( _var )
      list( APPEND ${_var} ${_arg} )
    endif( )

  endforeach( )

  # target must already exist
  if( NOT TARGET ${_target} )
    tde_message_fatal( "The specified target does not exists." )
  endif()

  # search include files suitable for processing
  if( _includes STREQUAL "AUTO" )
    file( GLOB _includes RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}
          ${CMAKE_CURRENT_SOURCE_DIR}/*.h )
    foreach( _include IN LISTS _includes )
      file( READ "${CMAKE_CURRENT_SOURCE_DIR}/${_include}" _src_content )
      string( REGEX REPLACE "(^|\n)[\t ]*#[^\n]*" "" _src_content "${_src_content}" )
      string( REGEX REPLACE "(//|/\\*)[^\n]*T?Q_OBJECT[^\n]*" "" _src_content "${_src_content}" )
      if( NOT _src_content MATCHES "[\n\t ]+T?Q_OBJECT[\n\t ]+" )
        list( REMOVE_ITEM _includes "${_include}" )
      endif()
    endforeach()
  elseif( _includes STREQUAL "-" )
    set( _includes "" )
  endif()

  # check tmoc executable
  if( NOT DEFINED TMOC_EXECUTABLE )
    find_program( TMOC_EXECUTABLE
      NAMES tmoc
      HINT ${QT_INSTALL_BINS}
    )
    if( "${TMOC_EXECUTABLE}" STREQUAL "TMOC_EXECUTABLE-NOTFOUND" )
      tde_message_fatal( "tmoc is required but not found" )
    endif( )
  endif()

  # processing sources of specified target
  get_property( _sources TARGET ${_target} PROPERTY SOURCES )
  foreach( _src_file IN LISTS _sources )

    get_filename_component( _src_file "${_src_file}" ABSOLUTE )

    if( EXISTS "${_src_file}" )

      # read source file and check if have moc include
      file( READ "${_src_file}" _src_content )
      string( REGEX MATCHALL "#include +[^ ]+\\.moc[\">]" _moc_includes "${_src_content}" )

      # found included moc(s)?
      if( _moc_includes )
        foreach( _moc_file ${_moc_includes} )

          # extracting moc filename
          string( REGEX MATCH "[^ <\"]+\\.moc" _moc_file "${_moc_file}" )
          set( _moc_file "${CMAKE_CURRENT_BINARY_DIR}/${_moc_file}" )

          # create source filename
          get_filename_component( _src_path "${_src_file}" ABSOLUTE )
          get_filename_component( _src_path "${_src_path}" PATH )
          get_filename_component( _src_header "${_moc_file}" NAME_WE )
          if( NOT TQT_FOUND )
            set( _moc_source "${_src_path}/${_src_header}.cpp" )
          else()
            set( _moc_source "${_src_path}/${_src_header}.h" )
          endif()

          # if header doesn't exists, check in META_INCLUDES
          if( NOT EXISTS "${_moc_source}" )
            unset( _found )
            foreach( _src_path ${_meta_includes} )
              set( _moc_source "${_src_path}/${_src_header}.h" )
              if( EXISTS "${_moc_source}" )
                set( _found 1 )
                break( )
              endif( )
            endforeach( )
            if( NOT _found )
              get_filename_component( _moc_file "${_moc_file}" NAME )
              tde_message_fatal( "AUTOMOC error: '${_moc_file}' cannot be generated.\n Reason: '${_src_file}.h' not found." )
            endif( )
          endif( )

          # moc-ing source
          add_custom_command( OUTPUT ${_moc_file}
            COMMAND ${TMOC_EXECUTABLE} ${_moc_source} -o ${_moc_file}
            DEPENDS ${_moc_source}
          )

          # create dependency between source file and moc file
          set_property( SOURCE ${_src_file} APPEND PROPERTY OBJECT_DEPENDS ${_moc_file} )

          # remove from includes for processing
          file( RELATIVE_PATH _moc_source ${CMAKE_CURRENT_SOURCE_DIR} ${_moc_source} )
          list( REMOVE_ITEM _includes "${_moc_source}" )

        endforeach( _moc_file )

      endif( _moc_includes )

    endif( EXISTS "${_src_file}" )

  endforeach( _src_file )

  # processing headers
  foreach( _include_file IN LISTS _includes )
    get_filename_component( _include_name "${_include_file}" NAME_WE )
    set( _moc_file ${CMAKE_CURRENT_BINARY_DIR}/moc_${_include_name}.cpp )

    # moc-ing source
    add_custom_command( OUTPUT ${_moc_file}
      COMMAND ${TMOC_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/${_include_file} -o ${_moc_file}
      DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${_include_file}
    )
    set_property( TARGET ${_target} APPEND PROPERTY SOURCES ${_moc_file} )
  endforeach( _include_file )

endmacro( tqt_automoc )


#################################################
#####
##### tqt_create_translation
#####
##### The macro is used for create binary files for translations
#####
##### Syntax:
#####   tqt_create_translation(
#####   )

macro( tqt_create_translation )

  file( GLOB _srcs RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/*_*.ts )
  list( SORT _srcs )

  # generate *.qm files
  foreach( _src ${_srcs} )

    get_filename_component( _src ${_src} ABSOLUTE )

    get_filename_component( _out ${_src} NAME_WE )
    string( REPLACE "@" "_" _target ${_out} )
    set( _out_filename "${_out}.qm" )
    set( _install_filename "${_out}.qm" )

    add_custom_command(
      OUTPUT ${_out_filename}
      COMMAND tqlrelease ${_src} -qm ${_out_filename}
      COMMENT "Build translation ${_out}"
      DEPENDS ${_src}
    )
    add_custom_target( "${_target}-translation" ALL DEPENDS ${_out_filename} )
    install(
      FILES ${CMAKE_CURRENT_BINARY_DIR}/${_out_filename}
      RENAME ${_install_filename}
      DESTINATION ${QT_INSTALL_TRANSLATIONS}
    )

  endforeach( )

endmacro( tqt_create_translation )