Drop the HTML reference manual altogether

Enable Doxygen-generated PDF help in lieu of HTML, and keep installing
devhelp. See discussion at
https://bugzilla.redhat.com/show_bug.cgi?id=2006555.

cairomm1.16.spec

@@ -6,6 +6,13 @@
 # building an autotools-generated tarball with meson, or vice versa.
 %bcond_without maintainer_mode
 
+# Doxygen HTML help is not suitable for packaging due to a minified JavaScript
+# bundle inserted by Doxygen itself. See discussion at
+# https://bugzilla.redhat.com/show_bug.cgi?id=2006555.
+#
+# We can enable the Doxygen PDF documentation as a lesser substitute.
+%bcond_without doc_pdf
+
 Name:           cairomm%{apiver}
 Summary:        C++ API for the cairo graphics library
 Version:        1.16.1
@@ -50,12 +57,15 @@ BuildRequires:  mm-common
 BuildRequires:  perl-interpreter
 BuildRequires:  perl(Getopt::Long)
 BuildRequires:  doxygen
-BuildRequires:  web-assets-devel
 # dot
 BuildRequires:  graphviz
 # xsltproc
 BuildRequires:  libxslt
 BuildRequires:  pkgconfig(mm-common-libstdc++)
+%if %{with doc_pdf}
+BuildRequires:  doxygen-latex
+BuildRequires:  make
+%endif
 
 # For tests:
 BuildRequires:  boost-devel
@@ -79,28 +89,12 @@ The API/ABI version series is %{apiver}.
 
 %package        doc
 Summary:        Documentation for cairomm%{apiver}
-# The documentation is licensed LGPLv2, same as the base package, except that
-# several files inserted by Doxygen are MIT-licensed:
-# - %%{_docdir}/cairomm-%%{apiver}/reference/html/dynsections.js
-# - %%{_docdir}/cairomm-%%{apiver}/reference/html/menu.js
-# - %%{_docdir}/cairomm-%%{apiver}/reference/html/menudata.js
-# - %%{_docdir}/cairomm-%%{apiver}/reference/html/search/search.js
-License:        LGPLv2 and MIT
 
 BuildArch:      noarch
 
-Requires:       libstdc++-docs
-Requires:       libsigc++20-doc
-
-Requires:       js-jquery
-# We do not treat the Doxygen-generated JavaScript files as bundled libraries,
-# but as generated helper code that may potentially vary from project to
-# project based on the settings in the Doxyfile.
-
 %description    doc
-Documentation for cairomm%{apiver} can be viewed either through the devhelp
-documentation browser or through a web browser at
-%{_docdir}/cairomm%{apiver}-%{apiver}/.
+Documentation for cairomm%{apiver} can be viewed through the devhelp
+documentation browser.
 
 The API/ABI version series is %{apiver}.
 
@@ -123,10 +117,21 @@ rm -rf "${workdir}"
 # sources are banned in Fedora. (Note also that the bundled JavaScript had a
 # different license.) We also remove the tag file, which triggers a rebuild of
 # the documentation. While we are at it, we might as well rebuild the devhelp
-# XML too.
+# XML too. Note that we will not install the HTML documentation.
 rm -rf untracked/docs/reference/html
 rm untracked/docs/reference/cairomm-%{apiver}.tag \
    untracked/docs/reference/cairomm-%{apiver}.devhelp2
+%if %{with doc_pdf}
+# We enable the Doxygen PDF documentation as a lesser substitute. We must
+# enable GENERATE_LATEX and LATEX_BATCHMODE; the rest are precautionary and
+# should already be set as we like them.
+sed -r -i \
+    -e "s/^([[:blank:]]*(GENERATE_LATEX|LATEX_BATCHMODE|USE_PDFLATEX|\
+PDF_HYPERLINKS)[[:blank:]]*=[[:blank:]]*)NO[[:blank:]]*/\1YES/" \
+    -e "s/^([[:blank:]]*(LATEX_TIMESTAMP)\
+[[:blank:]]*=[[:blank:]]*)YES[[:blank:]]*/\1NO/" \
+    docs/reference/Doxyfile.in
+%endif
 
 
 %build
@@ -139,6 +144,10 @@ rm untracked/docs/reference/cairomm-%{apiver}.tag \
   -Dwarnings=max
 %meson_build
 
+%if %{with doc_pdf}
+%make_build -C '%{_vpath_builddir}/docs/reference/latex'
+%endif
+
 
 %install
 %meson_install
@@ -147,9 +156,11 @@ install -t %{buildroot}%{_docdir}/cairomm-%{apiver} -m 0644 -p \
     AUTHORS ChangeLog MAINTAINERS NEWS README
 cp -rp examples %{buildroot}%{_docdir}/cairomm-%{apiver}/
 
-# Unbundle jquery inserted by Doxygen
-ln -svf '%{_jsdir}/jquery/3/jquery.js' \
-    '%{buildroot}%{_docdir}/cairomm-%{apiver}/reference/html/'
+rm -vrf '%{buildroot}%{_docdir}/cairomm-%{apiver}/reference/html'
+%if %{with doc_pdf}
+install -t '%{buildroot}%{_docdir}/cairomm-%{apiver}/reference' -p -m 0644 \
+    '%{_vpath_builddir}/docs/reference/latex/refman.pdf'
+%endif
 
 
 %check
@@ -172,7 +183,8 @@ ln -svf '%{_jsdir}/jquery/3/jquery.js' \
 
 %files doc
 %license COPYING
-%doc %{_docdir}/cairomm-%{apiver}/
+# Note: HTML reference manual has been removed. See comment in %%install.
+%doc %{_docdir}/cairomm-%{apiver}
 %doc %{_datadir}/devhelp/