# - Find Tcl includes and libraries.
# This module finds if Tcl is installed and determines where the
# include files and libraries are. It also determines what the name of
# the library is. This code sets the following variables:
#  TCL_FOUND              = Tcl was found
#  TK_FOUND               = Tk was found
#  TCLTK_FOUND            = Tcl and Tk were found
#  TCL_LIBRARY            = path to Tcl library (tcl tcl80)
#  TCL_INCLUDE_PATH       = path to where tcl.h can be found
#  TCL_TCLSH              = path to tclsh binary (tcl tcl80)
#  TK_LIBRARY             = path to Tk library (tk tk80 etc)
#  TK_INCLUDE_PATH        = path to where tk.h can be found
#  TK_WISH                = full path to the wish executable
#
# In an effort to remove some clutter and clear up some issues for people
# who are not necessarily Tcl/Tk gurus/developpers, some variables were
# moved or removed. Changes compared to CMake 2.4 are:
# - The stub libraries are now found in FindTclStub.cmake
#   => they were only useful for people writing Tcl/Tk extensions.
# - TCL_LIBRARY_DEBUG and TK_LIBRARY_DEBUG were removed.
#   => these libs are not packaged by default with Tcl/Tk distributions.
#      Even when Tcl/Tk is built from source, several flavors of debug libs
#      are created and there is no real reason to pick a single one
#      specifically (say, amongst tcl84g, tcl84gs, or tcl84sgx).
#      Let's leave that choice to the user by allowing him to assign
#      TCL_LIBRARY to any Tcl library, debug or not.
# - TK_INTERNAL_PATH was removed.
#   => this ended up being only a Win32 variable, and there is a lot of
#      confusion regarding the location of this file in an installed Tcl/Tk
#      tree anyway (see 8.5 for example). If you need the internal path at
#      this point it is safer you ask directly where the *source* tree is
#      and dig from there.

#=============================================================================
# Copyright 2001-2009 Kitware, Inc.
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of CMake, substitute the full
#  License text for the above reference.)

include(CMakeFindFrameworks)
include(FindTclsh)
include(FindWish)

if(TCLSH_VERSION_STRING)
  set(TCL_TCLSH_VERSION "${TCLSH_VERSION_STRING}")
else()
  get_filename_component(TCL_TCLSH_PATH "${TCL_TCLSH}" PATH)
  get_filename_component(TCL_TCLSH_PATH_PARENT "${TCL_TCLSH_PATH}" PATH)
  string(REGEX REPLACE
    "^.*tclsh([0-9]\\.*[0-9]).*$" "\\1" TCL_TCLSH_VERSION "${TCL_TCLSH}")
endif()

get_filename_component(TK_WISH_PATH "${TK_WISH}" PATH)
get_filename_component(TK_WISH_PATH_PARENT "${TK_WISH_PATH}" PATH)
string(REGEX REPLACE
  "^.*wish([0-9]\\.*[0-9]).*$" "\\1" TK_WISH_VERSION "${TK_WISH}")

get_filename_component(TCL_INCLUDE_PATH_PARENT "${TCL_INCLUDE_PATH}" PATH)
get_filename_component(TK_INCLUDE_PATH_PARENT "${TK_INCLUDE_PATH}" PATH)

get_filename_component(TCL_LIBRARY_PATH "${TCL_LIBRARY}" PATH)
get_filename_component(TCL_LIBRARY_PATH_PARENT "${TCL_LIBRARY_PATH}" PATH)
string(REGEX REPLACE
  "^.*tcl([0-9]\\.*[0-9]).*$" "\\1" TCL_LIBRARY_VERSION "${TCL_LIBRARY}")

get_filename_component(TK_LIBRARY_PATH "${TK_LIBRARY}" PATH)
get_filename_component(TK_LIBRARY_PATH_PARENT "${TK_LIBRARY_PATH}" PATH)
string(REGEX REPLACE
  "^.*tk([0-9]\\.*[0-9]).*$" "\\1" TK_LIBRARY_VERSION "${TK_LIBRARY}")

set(TCLTK_POSSIBLE_LIB_PATHS
  "${TCL_INCLUDE_PATH_PARENT}/lib"
  "${TK_INCLUDE_PATH_PARENT}/lib"
  "${TCL_LIBRARY_PATH}"
  "${TK_LIBRARY_PATH}"
  "${TCL_TCLSH_PATH_PARENT}/lib"
  "${TK_WISH_PATH_PARENT}/lib"
  )

if(WIN32)
  get_filename_component(
    ActiveTcl_CurrentVersion
    "[HKEY_LOCAL_MACHINE\\SOFTWARE\\ActiveState\\ActiveTcl;CurrentVersion]"
    NAME)
  set(TCLTK_POSSIBLE_LIB_PATHS ${TCLTK_POSSIBLE_LIB_PATHS}
    "[HKEY_LOCAL_MACHINE\\SOFTWARE\\ActiveState\\ActiveTcl\\${ActiveTcl_CurrentVersion}]/lib"
    "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Scriptics\\Tcl\\8.6;Root]/lib"
    "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Scriptics\\Tcl\\8.5;Root]/lib"
    "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Scriptics\\Tcl\\8.4;Root]/lib"
    "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Scriptics\\Tcl\\8.3;Root]/lib"
    "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Scriptics\\Tcl\\8.2;Root]/lib"
    "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Scriptics\\Tcl\\8.0;Root]/lib"
    "$ENV{ProgramFiles}/Tcl/Lib"
    "C:/Program Files/Tcl/lib"
    "C:/Tcl/lib"
    )
endif()

find_library(TCL_LIBRARY
  NAMES
  tcl
  tcl${TCL_LIBRARY_VERSION} tcl${TCL_TCLSH_VERSION} tcl${TK_WISH_VERSION}
  tcl86 tcl8.6
  tcl85 tcl8.5
  tcl84 tcl8.4
  tcl83 tcl8.3
  tcl82 tcl8.2
  tcl80 tcl8.0
  PATHS ${TCLTK_POSSIBLE_LIB_PATHS}
  )

find_library(TK_LIBRARY
  NAMES
  tk
  tk${TK_LIBRARY_VERSION} tk${TCL_TCLSH_VERSION} tk${TK_WISH_VERSION}
  tk86 tk8.6
  tk85 tk8.5
  tk84 tk8.4
  tk83 tk8.3
  tk82 tk8.2
  tk80 tk8.0
  PATHS ${TCLTK_POSSIBLE_LIB_PATHS}
  )

CMAKE_FIND_FRAMEWORKS(Tcl)
CMAKE_FIND_FRAMEWORKS(Tk)

set(TCL_FRAMEWORK_INCLUDES)
if(Tcl_FRAMEWORKS)
  if(NOT TCL_INCLUDE_PATH)
    foreach(dir ${Tcl_FRAMEWORKS})
      set(TCL_FRAMEWORK_INCLUDES ${TCL_FRAMEWORK_INCLUDES} ${dir}/Headers)
    endforeach()
  endif()
endif()

set(TK_FRAMEWORK_INCLUDES)
if(Tk_FRAMEWORKS)
  if(NOT TK_INCLUDE_PATH)
    foreach(dir ${Tk_FRAMEWORKS})
      set(TK_FRAMEWORK_INCLUDES ${TK_FRAMEWORK_INCLUDES}
        ${dir}/Headers ${dir}/PrivateHeaders)
    endforeach()
  endif()
endif()

set(TCLTK_POSSIBLE_INCLUDE_PATHS
  "${TCL_LIBRARY_PATH_PARENT}/include"
  "${TK_LIBRARY_PATH_PARENT}/include"
  "${TCL_INCLUDE_PATH}"
  "${TK_INCLUDE_PATH}"
  ${TCL_FRAMEWORK_INCLUDES}
  ${TK_FRAMEWORK_INCLUDES}
  "${TCL_TCLSH_PATH_PARENT}/include"
  "${TK_WISH_PATH_PARENT}/include"
  /usr/include/tcl${TK_LIBRARY_VERSION}
  /usr/include/tcl${TCL_LIBRARY_VERSION}
  /usr/include/tcl8.6
  /usr/include/tcl8.5
  /usr/include/tcl8.4
  /usr/include/tcl8.3
  /usr/include/tcl8.2
  /usr/include/tcl8.0
  )

if(WIN32)
  set(TCLTK_POSSIBLE_INCLUDE_PATHS ${TCLTK_POSSIBLE_INCLUDE_PATHS}
    "[HKEY_LOCAL_MACHINE\\SOFTWARE\\ActiveState\\ActiveTcl\\${ActiveTcl_CurrentVersion}]/include"
    "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Scriptics\\Tcl\\8.6;Root]/include"
    "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Scriptics\\Tcl\\8.5;Root]/include"
    "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Scriptics\\Tcl\\8.4;Root]/include"
    "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Scriptics\\Tcl\\8.3;Root]/include"
    "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Scriptics\\Tcl\\8.2;Root]/include"
    "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Scriptics\\Tcl\\8.0;Root]/include"
    "$ENV{ProgramFiles}/Tcl/include"
    "C:/Program Files/Tcl/include"
    "C:/Tcl/include"
    )
endif()

find_path(TCL_INCLUDE_PATH
  NAMES tcl.h
  HINTS ${TCLTK_POSSIBLE_INCLUDE_PATHS}
  )

find_path(TK_INCLUDE_PATH
  NAMES tk.h
  HINTS ${TCLTK_POSSIBLE_INCLUDE_PATHS}
  )

# handle the QUIETLY and REQUIRED arguments and set TCL_FOUND to TRUE if
# all listed variables are TRUE
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)

FIND_PACKAGE_HANDLE_STANDARD_ARGS(TCL DEFAULT_MSG TCL_LIBRARY TCL_INCLUDE_PATH)
set(TCLTK_FIND_REQUIRED ${TCL_FIND_REQUIRED})
set(TCLTK_FIND_QUIETLY  ${TCL_FIND_QUIETLY})
FIND_PACKAGE_HANDLE_STANDARD_ARGS(TCLTK DEFAULT_MSG TCL_LIBRARY TCL_INCLUDE_PATH TK_LIBRARY TK_INCLUDE_PATH)
set(TK_FIND_REQUIRED ${TCL_FIND_REQUIRED})
set(TK_FIND_QUIETLY  ${TCL_FIND_QUIETLY})
FIND_PACKAGE_HANDLE_STANDARD_ARGS(TK DEFAULT_MSG TK_LIBRARY TK_INCLUDE_PATH)

mark_as_advanced(
  TCL_INCLUDE_PATH
  TK_INCLUDE_PATH
  TCL_LIBRARY
  TK_LIBRARY
  )