# bindings/octave/CMakeLists.txt for PLplot
###
### Process this file with cmake to produce Makefile
###
# Copyright (C) 2006 Alan W. Irwin
#
# This file is part of PLplot.
#
# PLplot is free software; you can redistribute it and/or modify
# it under the terms of the GNU Library General Public License as published
# by the Free Software Foundation; version 2 of the License.
#
# PLplot is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public License
# along with PLplot; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA

# Build and install octave interface to PLplot and octave PLplot examples.
if(ENABLE_octave)

  add_subdirectory(PLplot)
  add_subdirectory(misc)

  # Install renamed documentation files.
  set(docfiles
    BUGS
    FGA
    INSTALL
    README
    ToDo
    USAGE
    )
  foreach(doc ${docfiles})
    install(FILES ${doc} DESTINATION ${DOC_DIR} RENAME ${doc}.octave)
  endforeach(doc ${docfiles})

  # This is a representative generated (or prebuilt) octave documentation file.
  # There are more than a hundred of these *.txt files.  If the (unlikely)
  # event that the plinit command is no longer part of the PLplot API, this
  # representative file would have to be changed.
  set(rep_doc plinit.txt)

  if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/plplot_octave_txt/${rep_doc})
    # Octave documentation has been prebuilt in the (tarball) source tree.
    # Copy it to the build tree if that tree is different from source tree.
    if(NOT CMAKE_BINARY_DIR STREQUAL "${CMAKE_SOURCE_DIR}")
      add_custom_command(
	OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/plplot_octave_txt/${rep_doc}
	COMMAND ${CMAKE_COMMAND} -E copy_directory
	${CMAKE_SOURCE_DIR}/bindings/octave/plplot_octave_txt
	${CMAKE_BINARY_DIR}/bindings/octave/plplot_octave_txt
	)
    endif(NOT CMAKE_BINARY_DIR STREQUAL "${CMAKE_SOURCE_DIR}")
    set(make_documentation_DEPENDS
      ${CMAKE_CURRENT_BINARY_DIR}/plplot_octave_txt/${rep_doc}
      )
  else(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/plplot_octave_txt/${rep_doc})
    # Generate full on-line help for plplot_octave
    file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/plplot_octave_txt)
    add_custom_command(
      OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/plplot_octave_txt/plplot.doc
      COMMAND ${CMAKE_COMMAND} -E copy
      ${CMAKE_CURRENT_SOURCE_DIR}/etc/plplot.doc
      ${CMAKE_CURRENT_BINARY_DIR}/plplot_octave_txt/plplot.doc
      DEPENDS
      ${CMAKE_CURRENT_SOURCE_DIR}/etc/plplot.doc
      )
    if(PERL_XML_DOM AND PERL_XML_PARSER)
      add_custom_command(
	OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/plplot_octave_txt/${rep_doc}
	COMMAND ${PERL_EXECUTABLE}
	${CMAKE_SOURCE_DIR}/doc/docbook/bin/api2text.pl
	${CMAKE_SOURCE_DIR}/doc/docbook/src/plplotdoc.xml.in
	${CMAKE_SOURCE_DIR}/doc/docbook/src/api.xml
	DEPENDS 
	${CMAKE_CURRENT_BINARY_DIR}/plplot_octave_txt/plplot.doc
	${CMAKE_SOURCE_DIR}/doc/docbook/bin/api2text.pl
	${CMAKE_SOURCE_DIR}/doc/docbook/src/plplotdoc.xml.in
	${CMAKE_SOURCE_DIR}/doc/docbook/src/api.xml
	WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/plplot_octave_txt
	)
      
      set(make_documentation_DEPENDS
	${CMAKE_CURRENT_BINARY_DIR}/plplot_octave_txt/${rep_doc}
	)
    else(PERL_XML_DOM AND PERL_XML_PARSER)
      message(STATUS 
	"WARNING: Perl modules XML::Parser and/or XML::DOM not available\n"
	"   so cannot generate full online help for plplot_octave"
	)
      set(make_documentation_DEPENDS
	${CMAKE_CURRENT_BINARY_DIR}/plplot_octave_txt/plplot.doc
	)
    endif(PERL_XML_DOM AND PERL_XML_PARSER)
  endif(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/plplot_octave_txt/${rep_doc})

  add_custom_target(
    make_documentation ALL
    DEPENDS ${make_documentation_DEPENDS}
    )

  # Configure source code for octave interface to PLplot.
  configure_file(
    ${CMAKE_CURRENT_SOURCE_DIR}/plplot_octave.h.in
    ${CMAKE_CURRENT_BINARY_DIR}/plplot_octave.h
    @ONLY
    )
  configure_file(
    ${CMAKE_CURRENT_SOURCE_DIR}/octave_version.pl.in
    ${CMAKE_CURRENT_BINARY_DIR}/octave_version.pl
    @ONLY
    )
  configure_file(
    ${CMAKE_CURRENT_SOURCE_DIR}/octaverc.in
    ${CMAKE_CURRENT_BINARY_DIR}/.octaverc
    @ONLY
    )

  # Build octave interface.
  add_custom_command(
    OUTPUT 
    ${CMAKE_CURRENT_BINARY_DIR}/plplot_stub.m
    COMMAND ${CMAKE_COMMAND} -E copy
    ${CMAKE_CURRENT_SOURCE_DIR}/plplot_stub_hand_crafted.m
    ${CMAKE_CURRENT_BINARY_DIR}/plplot_stub.m
    DEPENDS
    ${CMAKE_CURRENT_SOURCE_DIR}/plplot_stub_hand_crafted.m
    )

  add_custom_target(
    plplot_stub.m_built ALL
    DEPENDS
    ${CMAKE_CURRENT_BINARY_DIR}/plplot_stub.m
    )

  set(octave_interface_INCLUDE_PATHS
    ${CMAKE_SOURCE_DIR}/include
    ${CMAKE_SOURCE_DIR}/lib/qsastime
    ${CMAKE_BINARY_DIR}
    ${CMAKE_BINARY_DIR}/include
    ${CMAKE_CURRENT_BINARY_DIR}
    ${OCTAVE_INCLUDE_PATH}
    ${CMAKE_SOURCE_DIR}/bindings/swig-support
    )
  include_directories(${octave_interface_INCLUDE_PATHS})
  set(CMAKE_SWIG_FLAGS -DSWIG_OCTAVE)
  set(CMAKE_SWIG_OUTDIR ${CMAKE_CURRENT_BINARY_DIR})

  set_source_files_properties(plplot_octave.i 
    PROPERTIES 
    SWIG_MODULE_NAME plplot_octave
    CPLUSPLUS ON
    )

  set(SWIG_MODULE_plplot_octave_EXTRA_DEPS
    ${CMAKE_SOURCE_DIR}/bindings/swig-support/swig_documentation.i
    ${CMAKE_SOURCE_DIR}/bindings/swig-support/plplotcapi.i
    )

  # Set up swig + c wrapper.
  swig_add_module(plplot_octave octave plplot_octave.i)
  swig_link_libraries(
    plplot_octave 
    plplot${LIB_TAG}
    "${OCTAVE_LIBRARIES}"
    "${OCTINTERP_LIBRARIES}"
    )

  # Make sure plplot_stub.m is copied to build tree before plplot_octave
  # is created so can use plplot_octave in normal way.
  add_dependencies(plplot_octave plplot_stub.m_built)

  # Need access elsewhere (examples/octave) to the file depends of
  # this custom target.
  set_property(GLOBAL PROPERTY 
    FILES_plplot_stub.m_built
    ${CMAKE_CURRENT_BINARY_DIR}/plplot_stub.m
    )

  install(FILES 
    ${CMAKE_CURRENT_BINARY_DIR}/plplot_stub.m
    DESTINATION ${PLPLOT_OCTAVE_DIR}
    )

  if(USE_RPATH)
    get_target_property(LIB_INSTALL_RPATH plplot${LIB_TAG} INSTALL_RPATH)
    # (Reasonable) assumption here is that OCTAVE_LIBRARIES and
    # OCTINTERP_LIBRARIES have the same path.
    get_filename_component(OCTAVE_INSTALL_RPATH "${OCTAVE_LIBRARIES}" PATH)
    set(LIB_INSTALL_RPATH ${LIB_INSTALL_RPATH} ${OCTAVE_INSTALL_RPATH})
    set_target_properties(
      plplot_octave
      PROPERTIES
      PREFIX "" 
      SUFFIX ".oct"
      INSTALL_RPATH "${LIB_INSTALL_RPATH}"
      INSTALL_NAME_DIR "${OCTAVE_OCT_DIR}"
      )
  else(USE_RPATH)
    set_target_properties(
      plplot_octave
      PROPERTIES
      PREFIX "" 
      SUFFIX ".oct"
      INSTALL_NAME_DIR "${OCTAVE_OCT_DIR}"
      )
  endif(USE_RPATH)

  # Have to be specific about permissions for some reason (probably
  # oct suffix).  Use SO_PERMISSIONS to be consistent with permissions
  # used for other shared objects created by the add_library command.

  install(TARGETS plplot_octave
    EXPORT export_plplot
    LIBRARY
    DESTINATION ${OCTAVE_OCT_DIR}
    PERMISSIONS ${SO_PERMISSIONS}
    )

endif(ENABLE_octave)
