AC_PREREQ(2.53)
AC_INIT([matchbox-keyboard], 0.2, [tomas@sleepfive.com])
AC_CONFIG_SRCDIR([src/matchbox-keyboard.c])

AM_INIT_AUTOMAKE()
AM_CONFIG_HEADER(config.h)

m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

# Checks for programs.
AC_GNU_SOURCE
AC_DISABLE_STATIC
AC_PROG_LIBTOOL
AC_PROG_CC
AC_HEADER_DIRENT
AC_HEADER_STDC


# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_PID_T
AC_HEADER_TIME

# Checks for library functions.
AC_FUNC_ALLOCA
AC_FUNC_CLOSEDIR_VOID
AC_FUNC_FORK
AC_FUNC_SELECT_ARGTYPES
AC_TYPE_SIGNAL
AC_FUNC_STAT

LIBRARY_REQUIRES="libfakekey"
LIBRARY_EXTRA_LIBS=
LIBRARY_EXTRA_CFLAGS=

AC_ARG_ENABLE(cairo,
  AC_HELP_STRING([--enable-cairo],[enable experimental Cairo support [default=no]]),
   		enable_cairo=$enableval, 
		enable_cairo=no)	    

AC_ARG_ENABLE(examples,
  AC_HELP_STRING([--enable-examples], [Build embedding examples (requires GTK) [default=no]]),
   		enable_examples=$enableval, 
		enable_examples=no)
AM_CONDITIONAL(WANT_EXAMPLES, test x$enable_examples = xyes)
 
AC_ARG_ENABLE(gtk-im,
  AC_HELP_STRING([--enable-gtk-im], [enable GTK2+ IM support [default=no]]),
                 enable_gtk2_im=$enableval,
                 enable_gtk2_im=no)
AM_CONDITIONAL(WANT_GTK2_IM, test x$enable_gtk2_im = xyes)

AC_ARG_ENABLE(gtk3-im,
  AC_HELP_STRING([--enable-gtk3-im], [enable GTK3+ IM support [default=no]]),
                enable_gtk3_im=$enableval,
                enable_gtk3_im=no)
AM_CONDITIONAL(WANT_GTK3_IM, test x$enable_gtk3_im = xyes)

AC_ARG_ENABLE(applet,
  AC_HELP_STRING([--enable-applet], [enable panel applet [default=no]]),
   		enable_applet=$enableval, 
		enable_applet=no)	    
AM_CONDITIONAL(WANT_APPLET, test x$enable_applet = xyes)

AC_ARG_ENABLE(gtk-widget,
  AC_HELP_STRING([--enable-gtk-widget], [build gtk-widget [default=no]]),
		enable_gtk_widget=$enableval,
		enable_gtk_widget=no)
AM_CONDITIONAL(WANT_GTK_WIDGET, test x$enable_gtk_widget = xyes)

if test x$enable_gtk_widget = xyes; then
   AC_DEFINE_UNQUOTED(WANT_GTK_WIDGET, 1, [Build a gtk widget into library])
fi

AC_ARG_ENABLE(debug,
  AC_HELP_STRING([--enable-debug], [enable debug (verbose) build]),
     enable_debug=$enableval, enable_debug=no )

AC_ARG_WITH(expat-includes,    
  AC_HELP_STRING([--with-expat-includes=DIR], [Use Expat includes in DIR]),
	   expat_includes=$withval, expat_includes=yes)

AC_ARG_WITH(expat-lib,         
  AC_HELP_STRING([--with-expat-lib=DIR], [Use Expat library in DIR]),
	   expat_lib=$withval, expat_lib=yes)

PKG_CHECK_MODULES(FAKEKEY, libfakekey,,
	         AC_MSG_ERROR([*** You need to install libfakekey from MB SVN  ***]))

if test x$enable_cairo = xyes; then
   PKG_CHECK_MODULES(CAIRO, cairo)
   LIBRARY_REQUIRES="$LIBRARY_REQUIRES cairo"
fi

if test x$enable_cairo = xno; then
PKG_CHECK_MODULES(XFT, xft xrender,,
	         AC_MSG_ERROR([*** Required Xft Library not found ***]))
LIBRARY_REQUIRES="$LIBRARY_REQUIRES xft xrender"
fi

AM_CONDITIONAL(WANT_CAIRO, test x$enable_cairo = xyes)

if test x$enable_cairo = xyes; then
   AC_DEFINE_UNQUOTED(WANT_CAIRO, 1, [Use Cairo to paint libs])
fi

if test x$enable_examples = xyes || test x$enable_gtk2_im = xyes || test x$enable_gtk_widget = xyes; then
   PKG_CHECK_MODULES(GTK2, gtk+-2.0)
   GTK_VERSION=`$PKG_CONFIG --variable=gtk_binary_version gtk+-2.0`
   AC_SUBST(GTK_VERSION)
   if test x$enable_gtk_widget = xyes; then
      LIBRARY_REQUIRES="$LIBRARY_REQUIRES gtk+-2.0"
   fi
fi

if test x$enable_gtk3_im = xyes; then
   PKG_CHECK_MODULES(GTK3, gtk+-3.0)
   GTK3VERSION=`$PKG_CONFIG --variable=gtk_binary_version gtk+-3.0`
   AC_SUBST(GTK3VERSION)
fi


if test x$enable_applet = xyes; then
   PKG_CHECK_MODULES(APPLET, matchbox-panel)
fi


dnl ------ Expat ------------------------------------------------------------

  case "$expat_includes" in
    yes|no)
	EXPAT_CFLAGS=""
	;;
    *)
	EXPAT_CFLAGS="-I$expat_includes"
	;;
  esac
	
  case "$expat_lib" in
    yes)
	EXPAT_LIBS="-lexpat"
	;;
    no)
	;;
    *)
	EXPAT_LIBS="-L$expat_lib -lexpat"
	;;
   esac

   expatsaved_CPPFLAGS="$CPPFLAGS"
   CPPFLAGS="$CPPFLAGS $EXPAT_CFLAGS"
   expatsaved_LIBS="$LIBS"
   LIBS="$LIBS $EXPAT_LIBS"

   AC_CHECK_HEADER(expat.h)
   case "$ac_cv_header_expat_h" in
     no)
	 AC_CHECK_HEADER(xmlparse.h)

	 case "$ac_cv_header_xmlparse_h" in
	   no)
		have_expat_header=no;
		;;
	   yes)
		HAVE_XMLPARSE_H=1
		AC_SUBST(HAVE_XMLPARSE_H)
		AC_DEFINE_UNQUOTED(HAVE_XMLPARSE_H,$HAVE_XMLPARSE_H,
				       [Use xmlparse.h instead of expat.h])
		have_expat_header=yes
	        ;;
	 esac
	 ;;
     yes)
	 have_expat_header=yes
	;;
   esac
	
   case "$have_expat_header" in
     no)
	expat=no
	;;
     yes)
	AC_CHECK_FUNCS(XML_ParserCreate)

	case "$ac_cv_func_XML_ParserCreate" in
          no)
	  	expat=no
		;;
	  yes)
		HAVE_EXPAT=1
		AC_SUBST(HAVE_EXPAT)
		AC_DEFINE_UNQUOTED(HAVE_EXPAT,$HAVE_EXPAT,
		[Found a useable expat library])
		;;
	esac
	;;
   esac
	
   CPPFLAGS="$saved_CPPFLAGS"
   LIBS="$saved_LIBS"

   if test x$expat = xno; then
      AC_MSG_ERROR([cannot find expat library])
   fi

   if test "$cross_compiling" = yes; then
       LIBRARY_EXTRA_LIBS="$LIBRARY_EXTRA_LIBS -lexpat"
   else
       LIBRARY_EXTRA_LIBS="$LIBRARY_EXTRA_LIBS $EXPAT_LIBS"
       LIBRARY_EXTRA_CFLAGS="$LIBRARY_EXTRA_CFLAGS $EXPAT_CFLAGS"
   fi

dnl ------ Check for PNG ---------------------------------------------------

PKG_CHECK_MODULES(PNG, libpng)
LIBRARY_REQUIRES="$LIBRARY_REQUIRES libpng"


dnl ------ Debug Build ------------------------------------------------------

if test x$enable_debug = xyes; then
   AC_DEFINE_UNQUOTED(WANT_DEBUG, 1, [Make a debug (Verbose) Build])
fi


dnl ------ GCC flags --------------------------------------------------------

if test "x$GCC" = "xyes"; then
        GCC_WARNINGS="-g -Wall -fno-strict-aliasing"
        FAKEKEY_CFLAGS="$GCC_WARNINGS $FAKEKEY_CFLAGS"
fi


dnl ------ Substitute in found libs, clags to Makefiles etc -----------------

AC_SUBST(FAKEKEY_CFLAGS)
AC_SUBST(FAKEKEY_LIBS)

AC_SUBST(XFT_CFLAGS)
AC_SUBST(XFT_LIBS)

AC_SUBST(EXPAT_LIBS)
AC_SUBST(EXPAT_CFLAGS)

AC_SUBST(PNG_LIBS)
AC_SUBST(PNG_CFLAGS)

AC_SUBST(LIBRARY_REQUIRES)
AC_SUBST(LIBRARY_EXTRA_LIBS)
AC_SUBST(LIBRARY_EXTRA_CFLAGS)

AC_OUTPUT([
Makefile
src/Makefile
src/libmatchbox-keyboard.pc
layouts/Makefile
examples/Makefile
gtk-im/Makefile
applet/Makefile
])

dnl ==========================================================================
echo "
                    Matchbox-keyboard $VERSION
                  =========================

            prefix:                       ${prefix}
            source code location:         ${srcdir}
            compiler:                     ${CC} 

            Building with Debug:          ${enable_debug}
            Building with Cairo:          ${enable_cairo}
            Building Gtk widget:          ${enable_gtk_widget}
            Building Examples:            ${enable_examples}
            Building GTK2+ Input Method:  ${enable_gtk2_im}
            Building GTK3+ Input Method:  ${enable_gtk3_im}
            Building panel applet:        ${enable_applet}
"