# This file is part of Autoconf.                       -*- Autoconf -*-

# Copyright (C) 2004 Oren Ben-Kiki

# This file is distributed under the same terms as the Autoconf macro files.

# Generate automatic documentation using Doxygen. Works in concert with the

# aminclude.m4 file and a compatible doxygen configuration file. Defines the

# following public macros:

#

# DX_???_FEATURE(ON|OFF) - control the default setting fo a Doxygen feature.

# Supported features are 'DOXYGEN' itself, 'DOT' for generating graphics,

# 'HTML' for plain HTML, 'CHM' for compressed HTML help (for MS users), 'CHI'

# for generating a seperate .chi file by the .chm file, and 'MAN', 'RTF',

# 'XML', 'PDF' and 'PS' for the appropriate output formats. The environment

# variable DOXYGEN_PAPER_SIZE may be specified to override the default 'a4wide'

# paper size.

#

# By default, HTML, PDF and PS documentation is generated as this seems to be

# the most popular and portable combination. MAN pages created by Doxygen are

# usually problematic, though by picking an appropriate subset and doing some

# massaging they might be better than nothing. CHM and RTF are specific for MS

# (note that you can't generate both HTML and CHM at the same time). The XML is

# rather useless unless you apply specialized post-processing to it.

#

# The macro mainly controls the default state of the feature. The use can

# override the default by specifying --enable or --disable. The macros ensure

# that contradictory flags are not given (e.g., --enable-doxygen-html and

# --enable-doxygen-chm, --enable-doxygen-anything with --disable-doxygen, etc.)

# Finally, each feature will be automatically disabled (with a warning) if the

# required programs are missing.

#

# Once all the feature defaults have been specified, call DX_INIT_DOXYGEN with

# the following parameters: a one-word name for the project for use as a

# filename base etc., an optional configuration file name (the default is

# 'Doxyfile', the same as Doxygen's default), and an optional output directory

# name (the default is 'doxygen-doc').

## ----------##

## Defaults. ##

## ----------##

DX_ENV=""

AC_DEFUN([DX_FEATURE_doc],  ON)

AC_DEFUN([DX_FEATURE_dot],  ON)

AC_DEFUN([DX_FEATURE_man],  OFF)

AC_DEFUN([DX_FEATURE_html], ON)

AC_DEFUN([DX_FEATURE_chm],  OFF)

AC_DEFUN([DX_FEATURE_chi],  OFF)

AC_DEFUN([DX_FEATURE_rtf],  OFF)

AC_DEFUN([DX_FEATURE_xml],  OFF)

AC_DEFUN([DX_FEATURE_pdf],  ON)

AC_DEFUN([DX_FEATURE_ps],   ON)

## --------------- ##

## Private macros. ##

## --------------- ##

# DX_ENV_APPEND(VARIABLE, VALUE)

# ------------------------------

# Append VARIABLE="VALUE" to DX_ENV for invoking doxygen.

AC_DEFUN([DX_ENV_APPEND], [AC_SUBST([DX_ENV], ["$DX_ENV $1='$2'"])])

# DX_DIRNAME_EXPR

# ---------------

# Expand into a shell expression prints the directory part of a path.

AC_DEFUN([DX_DIRNAME_EXPR],

         [[expr ".$1" : '\(\.\)[^/]*$' \| "x$1" : 'x\(.*\)/[^/]*$']])

# DX_IF_FEATURE(FEATURE, IF-ON, IF-OFF)

# -------------------------------------

# Expands according to the M4 (static) status of the feature.

AC_DEFUN([DX_IF_FEATURE], [ifelse(DX_FEATURE_$1, ON, [$2], [$3])])

# DX_REQUIRE_PROG(VARIABLE, PROGRAM)

# ----------------------------------

# Require the specified program to be found for the DX_CURRENT_FEATURE to work.

AC_DEFUN([DX_REQUIRE_PROG], [

AC_PATH_TOOL([$1], [$2])

if test "$DX_FLAG_[]DX_CURRENT_FEATURE$$1" = 1; then

    AC_MSG_WARN([$2 not found - will not DX_CURRENT_DESCRIPTION])

    AC_SUBST([DX_FLAG_[]DX_CURRENT_FEATURE], 0)

fi

])

# DX_TEST_FEATURE(FEATURE)

# ------------------------

# Expand to a shell expression testing whether the feature is active.

AC_DEFUN([DX_TEST_FEATURE], [test "$DX_FLAG_$1" = 1])

# DX_CHECK_DEPEND(REQUIRED_FEATURE, REQUIRED_STATE)

# -------------------------------------------------

# Verify that a required features has the right state before trying to turn on

# the DX_CURRENT_FEATURE.

AC_DEFUN([DX_CHECK_DEPEND], [

test "$DX_FLAG_$1" = "$2" \

|| AC_MSG_ERROR([doxygen-DX_CURRENT_FEATURE ifelse([$2], 1,

                            requires, contradicts) doxygen-DX_CURRENT_FEATURE])

])

# DX_CLEAR_DEPEND(FEATURE, REQUIRED_FEATURE, REQUIRED_STATE)

# ----------------------------------------------------------

# Turn off the DX_CURRENT_FEATURE if the required feature is off.

AC_DEFUN([DX_CLEAR_DEPEND], [

test "$DX_FLAG_$1" = "$2" || AC_SUBST([DX_FLAG_[]DX_CURRENT_FEATURE], 0)

])

# DX_FEATURE_ARG(FEATURE, DESCRIPTION,

#                CHECK_DEPEND, CLEAR_DEPEND,

#                REQUIRE, DO-IF-ON, DO-IF-OFF)

# --------------------------------------------

# Parse the command-line option controlling a feature. CHECK_DEPEND is called

# if the user explicitly turns the feature on (and invokes DX_CHECK_DEPEND),

# otherwise CLEAR_DEPEND is called to turn off the default state if a required

# feature is disabled (using DX_CLEAR_DEPEND). REQUIRE performs additional

# requirement tests (DX_REQUIRE_PROG). Finally, an automake flag is set and

# DO-IF-ON or DO-IF-OFF are called according to the final state of the feature.

AC_DEFUN([DX_ARG_ABLE], [

    AC_DEFUN([DX_CURRENT_FEATURE], [$1])

    AC_DEFUN([DX_CURRENT_DESCRIPTION], [$2])

    AC_ARG_ENABLE(doxygen-$1,

                  [AS_HELP_STRING(DX_IF_FEATURE([$1], [--disable-doxygen-$1],

                                                      [--enable-doxygen-$1]),

                                  DX_IF_FEATURE([$1], [don't $2], [$2]))],

                  [

case "$enableval" in

#(

y|Y|yes|Yes|YES)

    AC_SUBST([DX_FLAG_$1], 1)

    $3

;; #(

n|N|no|No|NO)

    AC_SUBST([DX_FLAG_$1], 0)

;; #(

*)

    AC_MSG_ERROR([invalid value '$enableval' given to doxygen-$1])

;;

esac

], [

AC_SUBST([DX_FLAG_$1], [DX_IF_FEATURE([$1], 1, 0)])

$4

])

if DX_TEST_FEATURE([$1]); then

    $5

    :

fi

if DX_TEST_FEATURE([$1]); then

    AM_CONDITIONAL(DX_COND_$1, :)

    $6

    :

else

    AM_CONDITIONAL(DX_COND_$1, false)

    $7

    :

fi

])

## -------------- ##

## Public macros. ##

## -------------- ##

# DX_XXX_FEATURE(DEFAULT_STATE)

# -----------------------------

AC_DEFUN([DX_DOXYGEN_FEATURE], [AC_DEFUN([DX_FEATURE_doc],  [$1])])

AC_DEFUN([DX_MAN_FEATURE],     [AC_DEFUN([DX_FEATURE_man],  [$1])])

AC_DEFUN([DX_HTML_FEATURE],    [AC_DEFUN([DX_FEATURE_html], [$1])])

AC_DEFUN([DX_CHM_FEATURE],     [AC_DEFUN([DX_FEATURE_chm],  [$1])])

AC_DEFUN([DX_CHI_FEATURE],     [AC_DEFUN([DX_FEATURE_chi],  [$1])])

AC_DEFUN([DX_RTF_FEATURE],     [AC_DEFUN([DX_FEATURE_rtf],  [$1])])

AC_DEFUN([DX_XML_FEATURE],     [AC_DEFUN([DX_FEATURE_xml],  [$1])])

AC_DEFUN([DX_XML_FEATURE],     [AC_DEFUN([DX_FEATURE_xml],  [$1])])

AC_DEFUN([DX_PDF_FEATURE],     [AC_DEFUN([DX_FEATURE_pdf],  [$1])])

AC_DEFUN([DX_PS_FEATURE],      [AC_DEFUN([DX_FEATURE_ps],   [$1])])

# DX_INIT_DOXYGEN(PROJECT, [CONFIG-FILE], [OUTPUT-DOC-DIR])

# ---------------------------------------------------------

# PROJECT also serves as the base name for the documentation files.

# The default CONFIG-FILE is "Doxyfile" and OUTPUT-DOC-DIR is "doxygen-doc".

AC_DEFUN([DX_INIT_DOXYGEN], [

# Files:

AC_SUBST([DX_PROJECT], [$1])

AC_SUBST([DX_CONFIG], [ifelse([$2], [], Doxyfile, [$2])])

AC_SUBST([DX_DOCDIR], [ifelse([$3], [], doxygen-doc, [$3])])

# Environment variables used inside doxygen.cfg:

DX_ENV_APPEND(SRCDIR, $srcdir)

DX_ENV_APPEND(PROJECT, $DX_PROJECT)

DX_ENV_APPEND(DOCDIR, $DX_DOCDIR)

DX_ENV_APPEND(VERSION, $PACKAGE_VERSION)

# Doxygen itself:

DX_ARG_ABLE(doc, [generate any doxygen documentation],

            [],

            [],

            [DX_REQUIRE_PROG([DX_DOXYGEN], doxygen)

             DX_REQUIRE_PROG([DX_PERL], perl)],

            [DX_ENV_APPEND(PERL_PATH, $DX_PERL)])

# Dot for graphics:

DX_ARG_ABLE(dot, [generate graphics for doxygen documentation],

            [DX_CHECK_DEPEND(doc, 1)],

            [DX_CLEAR_DEPEND(doc, 1)],

            [DX_REQUIRE_PROG([DX_DOT], dot)],

            [DX_ENV_APPEND(HAVE_DOT, YES)

             DX_ENV_APPEND(DOT_PATH, [`DX_DIRNAME_EXPR($DX_DOT)`])],

            [DX_ENV_APPEND(HAVE_DOT, NO)])

# Man pages generation:

DX_ARG_ABLE(man, [generate doxygen manual pages],

            [DX_CHECK_DEPEND(doc, 1)],

            [DX_CLEAR_DEPEND(doc, 1)],

            [],

            [DX_ENV_APPEND(GENERATE_MAN, YES)],

            [DX_ENV_APPEND(GENERATE_MAN, NO)])

# RTF file generation:

DX_ARG_ABLE(rtf, [generate doxygen RTF documentation],

            [DX_CHECK_DEPEND(doc, 1)],

            [DX_CLEAR_DEPEND(doc, 1)],

            [],

            [DX_ENV_APPEND(GENERATE_RTF, YES)],

            [DX_ENV_APPEND(GENERATE_RTF, NO)])

# XML file generation:

DX_ARG_ABLE(xml, [generate doxygen XML documentation],

            [DX_CHECK_DEPEND(doc, 1)],

            [DX_CLEAR_DEPEND(doc, 1)],

            [],

            [DX_ENV_APPEND(GENERATE_XML, YES)],

            [DX_ENV_APPEND(GENERATE_XML, NO)])

# (Compressed) HTML help generation:

DX_ARG_ABLE(chm, [generate doxygen compressed HTML help documentation],

            [DX_CHECK_DEPEND(doc, 1)],

            [DX_CLEAR_DEPEND(doc, 1)],

            [DX_REQUIRE_PROG([DX_HHC], hhc)],

            [DX_ENV_APPEND(HHC_PATH, $DX_HHC)

             DX_ENV_APPEND(GENERATE_HTML, YES)

             DX_ENV_APPEND(GENERATE_HTMLHELP, YES)],

            [DX_ENV_APPEND(GENERATE_HTMLHELP, NO)])

# Seperate CHI file generation.

DX_ARG_ABLE(chi, [generate doxygen seperate compressed HTML help index file],

            [DX_CHECK_DEPEND(chm, 1)],

            [DX_CLEAR_DEPEND(chm, 1)],

            [],

            [DX_ENV_APPEND(GENERATE_CHI, YES)],

            [DX_ENV_APPEND(GENERATE_CHI, NO)])

# Plain HTML pages generation:

DX_ARG_ABLE(html, [generate doxygen plain HTML documentation],

            [DX_CHECK_DEPEND(doc, 1) DX_CHECK_DEPEND(chm, 0)],

            [DX_CLEAR_DEPEND(doc, 1) DX_CLEAR_DEPEND(chm, 0)],

            [],

            [DX_ENV_APPEND(GENERATE_HTML, YES)],

            [DX_TEST_FEATURE(chm) || DX_ENV_APPEND(GENERATE_HTML, NO)])

# PostScript file generation:

DX_ARG_ABLE(ps, [generate doxygen PostScript documentation],

            [DX_CHECK_DEPEND(doc, 1)],

            [DX_CLEAR_DEPEND(doc, 1)],

            [DX_REQUIRE_PROG([DX_LATEX], latex)

             DX_REQUIRE_PROG([DX_MAKEINDEX], makeindex)

             DX_REQUIRE_PROG([DX_DVIPS], dvips)

             DX_REQUIRE_PROG([DX_EGREP], egrep)])

# PDF file generation:

DX_ARG_ABLE(pdf, [generate doxygen PDF documentation],

            [DX_CHECK_DEPEND(doc, 1)],

            [DX_CLEAR_DEPEND(doc, 1)],

            [DX_REQUIRE_PROG([DX_PDFLATEX], pdflatex)

             DX_REQUIRE_PROG([DX_MAKEINDEX], makeindex)

             DX_REQUIRE_PROG([DX_EGREP], egrep)])

# LaTeX generation for PS and/or PDF:

if DX_TEST_FEATURE(ps) || DX_TEST_FEATURE(pdf); then

    AM_CONDITIONAL(DX_COND_latex, :)

    DX_ENV_APPEND(GENERATE_LATEX, YES)

else

    AM_CONDITIONAL(DX_COND_latex, false)

    DX_ENV_APPEND(GENERATE_LATEX, NO)

fi

# Paper size for PS and/or PDF:

AC_ARG_VAR(DOXYGEN_PAPER_SIZE,

           [a4wide (default), a4, letter, legal or executive])

case "$DOXYGEN_PAPER_SIZE" in

#(

"")

    AC_SUBST(DOXYGEN_PAPER_SIZE, "")

;; #(

a4wide|a4|letter|legal|executive)

    DX_ENV_APPEND(PAPER_SIZE, $DOXYGEN_PAPER_SIZE)

;; #(

*)

    AC_MSG_ERROR([unknown DOXYGEN_PAPER_SIZE='$DOXYGEN_PAPER_SIZE'])

;;

esac

#For debugging:

#echo DX_FLAG_doc=$DX_FLAG_doc

#echo DX_FLAG_dot=$DX_FLAG_dot

#echo DX_FLAG_man=$DX_FLAG_man

#echo DX_FLAG_html=$DX_FLAG_html

#echo DX_FLAG_chm=$DX_FLAG_chm

#echo DX_FLAG_chi=$DX_FLAG_chi

#echo DX_FLAG_rtf=$DX_FLAG_rtf

#echo DX_FLAG_xml=$DX_FLAG_xml

#echo DX_FLAG_pdf=$DX_FLAG_pdf

#echo DX_FLAG_ps=$DX_FLAG_ps

#echo DX_ENV=$DX_ENV

])