1# This file is part of Autoconf.                       -*- Autoconf -*-
2
3# Copyright (C) 2004 Oren Ben-Kiki
4# This file is distributed under the same terms as the Autoconf macro files.
5
6# Generate automatic documentation using Doxygen. Works in concert with the
7# aminclude.m4 file and a compatible doxygen configuration file. Defines the
8# following public macros:
9#
10# DX_???_FEATURE(ON|OFF) - control the default setting fo a Doxygen feature.
11# Supported features are 'DOXYGEN' itself, 'DOT' for generating graphics,
12# 'HTML' for plain HTML, 'CHM' for compressed HTML help (for MS users), 'CHI'
13# for generating a seperate .chi file by the .chm file, and 'MAN', 'RTF',
14# 'XML', 'PDF' and 'PS' for the appropriate output formats. The environment
15# variable DOXYGEN_PAPER_SIZE may be specified to override the default 'a4wide'
16# paper size.
17#
18# By default, HTML, PDF and PS documentation is generated as this seems to be
19# the most popular and portable combination. MAN pages created by Doxygen are
20# usually problematic, though by picking an appropriate subset and doing some
21# massaging they might be better than nothing. CHM and RTF are specific for MS
22# (note that you can't generate both HTML and CHM at the same time). The XML is
23# rather useless unless you apply specialized post-processing to it.
24#
25# The macro mainly controls the default state of the feature. The use can
26# override the default by specifying --enable or --disable. The macros ensure
27# that contradictory flags are not given (e.g., --enable-doxygen-html and
28# --enable-doxygen-chm, --enable-doxygen-anything with --disable-doxygen, etc.)
29# Finally, each feature will be automatically disabled (with a warning) if the
30# required programs are missing.
31#
32# Once all the feature defaults have been specified, call DX_INIT_DOXYGEN with
33# the following parameters: a one-word name for the project for use as a
34# filename base etc., an optional configuration file name (the default is
35# 'Doxyfile', the same as Doxygen's default), and an optional output directory
36# name (the default is 'doxygen-doc').
37
38## ----------##
39## Defaults. ##
40## ----------##
41
42DX_ENV=""
43AC_DEFUN([DX_FEATURE_doc],  ON)
44AC_DEFUN([DX_FEATURE_dot],  ON)
45AC_DEFUN([DX_FEATURE_man],  OFF)
46AC_DEFUN([DX_FEATURE_html], ON)
47AC_DEFUN([DX_FEATURE_chm],  OFF)
48AC_DEFUN([DX_FEATURE_chi],  OFF)
49AC_DEFUN([DX_FEATURE_rtf],  OFF)
50AC_DEFUN([DX_FEATURE_xml],  OFF)
51AC_DEFUN([DX_FEATURE_pdf],  ON)
52AC_DEFUN([DX_FEATURE_ps],   ON)
53
54## --------------- ##
55## Private macros. ##
56## --------------- ##
57
58# DX_ENV_APPEND(VARIABLE, VALUE)
59# ------------------------------
60# Append VARIABLE="VALUE" to DX_ENV for invoking doxygen.
61AC_DEFUN([DX_ENV_APPEND], [AC_SUBST([DX_ENV], ["$DX_ENV $1='$2'"])])
62
63# DX_DIRNAME_EXPR
64# ---------------
65# Expand into a shell expression prints the directory part of a path.
66AC_DEFUN([DX_DIRNAME_EXPR],
67         [[expr ".$1" : '\(\.\)[^/]*$' \| "x$1" : 'x\(.*\)/[^/]*$']])
68
69# DX_IF_FEATURE(FEATURE, IF-ON, IF-OFF)
70# -------------------------------------
71# Expands according to the M4 (static) status of the feature.
72AC_DEFUN([DX_IF_FEATURE], [ifelse(DX_FEATURE_$1, ON, [$2], [$3])])
73
74# DX_REQUIRE_PROG(VARIABLE, PROGRAM)
75# ----------------------------------
76# Require the specified program to be found for the DX_CURRENT_FEATURE to work.
77AC_DEFUN([DX_REQUIRE_PROG], [
78AC_PATH_TOOL([$1], [$2])
79if test "$DX_FLAG_[]DX_CURRENT_FEATURE$$1" = 1; then
80    AC_MSG_WARN([$2 not found - will not DX_CURRENT_DESCRIPTION])
81    AC_SUBST([DX_FLAG_]DX_CURRENT_FEATURE, 0)
82fi
83])
84
85# DX_TEST_FEATURE(FEATURE)
86# ------------------------
87# Expand to a shell expression testing whether the feature is active.
88AC_DEFUN([DX_TEST_FEATURE], [test "$DX_FLAG_$1" = 1])
89
90# DX_CHECK_DEPEND(REQUIRED_FEATURE, REQUIRED_STATE)
91# -------------------------------------------------
92# Verify that a required features has the right state before trying to turn on
93# the DX_CURRENT_FEATURE.
94AC_DEFUN([DX_CHECK_DEPEND], [
95test "$DX_FLAG_$1" = "$2" \
96|| AC_MSG_ERROR([doxygen-DX_CURRENT_FEATURE ifelse([$2], 1,
97                            requires, contradicts) doxygen-DX_CURRENT_FEATURE])
98])
99
100# DX_CLEAR_DEPEND(FEATURE, REQUIRED_FEATURE, REQUIRED_STATE)
101# ----------------------------------------------------------
102# Turn off the DX_CURRENT_FEATURE if the required feature is off.
103AC_DEFUN([DX_CLEAR_DEPEND], [
104test "$DX_FLAG_$1" = "$2" || AC_SUBST([DX_FLAG_]DX_CURRENT_FEATURE, 0)
105])
106
107# DX_FEATURE_ARG(FEATURE, DESCRIPTION,
108#                CHECK_DEPEND, CLEAR_DEPEND,
109#                REQUIRE, DO-IF-ON, DO-IF-OFF)
110# --------------------------------------------
111# Parse the command-line option controlling a feature. CHECK_DEPEND is called
112# if the user explicitly turns the feature on (and invokes DX_CHECK_DEPEND),
113# otherwise CLEAR_DEPEND is called to turn off the default state if a required
114# feature is disabled (using DX_CLEAR_DEPEND). REQUIRE performs additional
115# requirement tests (DX_REQUIRE_PROG). Finally, an automake flag is set and
116# DO-IF-ON or DO-IF-OFF are called according to the final state of the feature.
117AC_DEFUN([DX_ARG_ABLE], [
118    AC_DEFUN([DX_CURRENT_FEATURE], [$1])
119    AC_DEFUN([DX_CURRENT_DESCRIPTION], [$2])
120    AC_ARG_ENABLE(doxygen-$1,
121                  [AS_HELP_STRING(DX_IF_FEATURE([$1], [--disable-doxygen-$1],
122                                                      [--enable-doxygen-$1]),
123                                  DX_IF_FEATURE([$1], [don't $2], [$2]))],
124                  [
125case "$enableval" in
126#(
127y|Y|yes|Yes|YES)
128    AC_SUBST([DX_FLAG_$1], 1)
129    $3
130;; #(
131n|N|no|No|NO)
132    AC_SUBST([DX_FLAG_$1], 0)
133;; #(
134*)
135    AC_MSG_ERROR([invalid value '$enableval' given to doxygen-$1])
136;;
137esac
138], [
139AC_SUBST([DX_FLAG_$1], [DX_IF_FEATURE([$1], 1, 0)])
140$4
141])
142if DX_TEST_FEATURE([$1]); then
143    $5
144    :
145fi
146if DX_TEST_FEATURE([$1]); then
147    AM_CONDITIONAL(DX_COND_$1, :)
148    $6
149    :
150else
151    AM_CONDITIONAL(DX_COND_$1, false)
152    $7
153    :
154fi
155])
156
157## -------------- ##
158## Public macros. ##
159## -------------- ##
160
161# DX_XXX_FEATURE(DEFAULT_STATE)
162# -----------------------------
163AC_DEFUN([DX_DOXYGEN_FEATURE], [AC_DEFUN([DX_FEATURE_doc],  [$1])])
164AC_DEFUN([DX_MAN_FEATURE],     [AC_DEFUN([DX_FEATURE_man],  [$1])])
165AC_DEFUN([DX_HTML_FEATURE],    [AC_DEFUN([DX_FEATURE_html], [$1])])
166AC_DEFUN([DX_CHM_FEATURE],     [AC_DEFUN([DX_FEATURE_chm],  [$1])])
167AC_DEFUN([DX_CHI_FEATURE],     [AC_DEFUN([DX_FEATURE_chi],  [$1])])
168AC_DEFUN([DX_RTF_FEATURE],     [AC_DEFUN([DX_FEATURE_rtf],  [$1])])
169AC_DEFUN([DX_XML_FEATURE],     [AC_DEFUN([DX_FEATURE_xml],  [$1])])
170AC_DEFUN([DX_XML_FEATURE],     [AC_DEFUN([DX_FEATURE_xml],  [$1])])
171AC_DEFUN([DX_PDF_FEATURE],     [AC_DEFUN([DX_FEATURE_pdf],  [$1])])
172AC_DEFUN([DX_PS_FEATURE],      [AC_DEFUN([DX_FEATURE_ps],   [$1])])
173
174# DX_INIT_DOXYGEN(PROJECT, [CONFIG-FILE], [OUTPUT-DOC-DIR])
175# ---------------------------------------------------------
176# PROJECT also serves as the base name for the documentation files.
177# The default CONFIG-FILE is "Doxyfile" and OUTPUT-DOC-DIR is "doxygen-doc".
178AC_DEFUN([DX_INIT_DOXYGEN], [
179
180# Files:
181AC_SUBST([DX_PROJECT], [$1])
182AC_SUBST([DX_CONFIG], [ifelse([$2], [], Doxyfile, [$2])])
183AC_SUBST([DX_DOCDIR], [ifelse([$3], [], doxygen-doc, [$3])])
184
185# Environment variables used inside doxygen.cfg:
186DX_ENV_APPEND(SRCDIR, $srcdir)
187DX_ENV_APPEND(PROJECT, $DX_PROJECT)
188DX_ENV_APPEND(DOCDIR, $DX_DOCDIR)
189DX_ENV_APPEND(VERSION, $PACKAGE_VERSION)
190
191# Doxygen itself:
192DX_ARG_ABLE(doc, [generate any doxygen documentation],
193            [],
194            [],
195            [DX_REQUIRE_PROG([DX_DOXYGEN], doxygen)
196             DX_REQUIRE_PROG([DX_PERL], perl)],
197            [DX_ENV_APPEND(PERL_PATH, $DX_PERL)])
198
199# Dot for graphics:
200DX_ARG_ABLE(dot, [generate graphics for doxygen documentation],
201            [DX_CHECK_DEPEND(doc, 1)],
202            [DX_CLEAR_DEPEND(doc, 1)],
203            [DX_REQUIRE_PROG([DX_DOT], dot)],
204            [DX_ENV_APPEND(HAVE_DOT, YES)
205             DX_ENV_APPEND(DOT_PATH, [`DX_DIRNAME_EXPR($DX_DOT)`])],
206            [DX_ENV_APPEND(HAVE_DOT, NO)])
207
208# Man pages generation:
209DX_ARG_ABLE(man, [generate doxygen manual pages],
210            [DX_CHECK_DEPEND(doc, 1)],
211            [DX_CLEAR_DEPEND(doc, 1)],
212            [],
213            [DX_ENV_APPEND(GENERATE_MAN, YES)],
214            [DX_ENV_APPEND(GENERATE_MAN, NO)])
215
216# RTF file generation:
217DX_ARG_ABLE(rtf, [generate doxygen RTF documentation],
218            [DX_CHECK_DEPEND(doc, 1)],
219            [DX_CLEAR_DEPEND(doc, 1)],
220            [],
221            [DX_ENV_APPEND(GENERATE_RTF, YES)],
222            [DX_ENV_APPEND(GENERATE_RTF, NO)])
223
224# XML file generation:
225DX_ARG_ABLE(xml, [generate doxygen XML documentation],
226            [DX_CHECK_DEPEND(doc, 1)],
227            [DX_CLEAR_DEPEND(doc, 1)],
228            [],
229            [DX_ENV_APPEND(GENERATE_XML, YES)],
230            [DX_ENV_APPEND(GENERATE_XML, NO)])
231
232# (Compressed) HTML help generation:
233DX_ARG_ABLE(chm, [generate doxygen compressed HTML help documentation],
234            [DX_CHECK_DEPEND(doc, 1)],
235            [DX_CLEAR_DEPEND(doc, 1)],
236            [DX_REQUIRE_PROG([DX_HHC], hhc)],
237            [DX_ENV_APPEND(HHC_PATH, $DX_HHC)
238             DX_ENV_APPEND(GENERATE_HTML, YES)
239             DX_ENV_APPEND(GENERATE_HTMLHELP, YES)],
240            [DX_ENV_APPEND(GENERATE_HTMLHELP, NO)])
241
242# Seperate CHI file generation.
243DX_ARG_ABLE(chi, [generate doxygen seperate compressed HTML help index file],
244            [DX_CHECK_DEPEND(chm, 1)],
245            [DX_CLEAR_DEPEND(chm, 1)],
246            [],
247            [DX_ENV_APPEND(GENERATE_CHI, YES)],
248            [DX_ENV_APPEND(GENERATE_CHI, NO)])
249
250# Plain HTML pages generation:
251DX_ARG_ABLE(html, [generate doxygen plain HTML documentation],
252            [DX_CHECK_DEPEND(doc, 1) DX_CHECK_DEPEND(chm, 0)],
253            [DX_CLEAR_DEPEND(doc, 1) DX_CLEAR_DEPEND(chm, 0)],
254            [],
255            [DX_ENV_APPEND(GENERATE_HTML, YES)],
256            [DX_TEST_FEATURE(chm) || DX_ENV_APPEND(GENERATE_HTML, NO)])
257
258# PostScript file generation:
259DX_ARG_ABLE(ps, [generate doxygen PostScript documentation],
260            [DX_CHECK_DEPEND(doc, 1)],
261            [DX_CLEAR_DEPEND(doc, 1)],
262            [DX_REQUIRE_PROG([DX_LATEX], latex)
263             DX_REQUIRE_PROG([DX_MAKEINDEX], makeindex)
264             DX_REQUIRE_PROG([DX_DVIPS], dvips)
265             DX_REQUIRE_PROG([DX_EGREP], egrep)])
266
267# PDF file generation:
268DX_ARG_ABLE(pdf, [generate doxygen PDF documentation],
269            [DX_CHECK_DEPEND(doc, 1)],
270            [DX_CLEAR_DEPEND(doc, 1)],
271            [DX_REQUIRE_PROG([DX_PDFLATEX], pdflatex)
272             DX_REQUIRE_PROG([DX_MAKEINDEX], makeindex)
273             DX_REQUIRE_PROG([DX_EGREP], egrep)])
274
275# LaTeX generation for PS and/or PDF:
276if DX_TEST_FEATURE(ps) || DX_TEST_FEATURE(pdf); then
277    AM_CONDITIONAL(DX_COND_latex, :)
278    DX_ENV_APPEND(GENERATE_LATEX, YES)
279else
280    AM_CONDITIONAL(DX_COND_latex, false)
281    DX_ENV_APPEND(GENERATE_LATEX, NO)
282fi
283
284# Paper size for PS and/or PDF:
285AC_ARG_VAR(DOXYGEN_PAPER_SIZE,
286           [a4wide (default), a4, letter, legal or executive])
287case "$DOXYGEN_PAPER_SIZE" in
288#(
289"")
290    AC_SUBST(DOXYGEN_PAPER_SIZE, "")
291;; #(
292a4wide|a4|letter|legal|executive)
293    DX_ENV_APPEND(PAPER_SIZE, $DOXYGEN_PAPER_SIZE)
294;; #(
295*)
296    AC_MSG_ERROR([unknown DOXYGEN_PAPER_SIZE='$DOXYGEN_PAPER_SIZE'])
297;;
298esac
299
300#For debugging:
301#echo DX_FLAG_doc=$DX_FLAG_doc
302#echo DX_FLAG_dot=$DX_FLAG_dot
303#echo DX_FLAG_man=$DX_FLAG_man
304#echo DX_FLAG_html=$DX_FLAG_html
305#echo DX_FLAG_chm=$DX_FLAG_chm
306#echo DX_FLAG_chi=$DX_FLAG_chi
307#echo DX_FLAG_rtf=$DX_FLAG_rtf
308#echo DX_FLAG_xml=$DX_FLAG_xml
309#echo DX_FLAG_pdf=$DX_FLAG_pdf
310#echo DX_FLAG_ps=$DX_FLAG_ps
311#echo DX_ENV=$DX_ENV
312])
313