# Copyright 1999-2018 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

EAPI=6

inherit eutils flag-o-matic autotools versionator

# HINTS:
# -> non-free modules are x86 and amd64 only
# -> iscan frontend needs non-free modules
# -> sane-epkowa should be usable on every arch
# -> ${P}-${SRC_REV}.tar.gz    (for gcc 3.2/3.3)
# -> ${P}-${SRC_REV}.c2.tar.gz (for gcc 3.4 or later)

# FIXME:
# Make jpeg/png optional. The problem is, that the configure script ignores --disable-*,
# if the corresponding lib is found on the system.
# Furthermore, iscan doesn't compile w/o libusb, this should be fixed somehow.

# TODO:
# (re)add closed-source binary modules which are needed for some scanners.

KEYWORDS="amd64 x86"

MY_PV="$(get_version_component_range 1-3)"
MY_PVR="$(replace_version_separator 3 -)"
MY_DOC="userg_revQ"

DESCRIPTION="EPSON Image Scan! for Linux (including sane-epkowa backend)"
HOMEPAGE="http://download.ebz.epson.net/dsc/search/01/search/?OSC=LX"
SRC_URI="http://support.epson.net/linux/src/scanner/iscan/${PN}_${MY_PVR}.tar.gz
	doc? (
		https://dev.gentoo.org/~flameeyes/avasys/${MY_DOC}_e.pdf
		l10n_ja? ( https://dev.gentoo.org/~flameeyes/avasys/${MY_DOC}_j.pdf )
	)"
LICENSE="GPL-2 AVASYS"
SLOT="0"

IUSE="X doc gimp jpeg png tiff l10n_ja"

REQUIRED_USE="gimp? ( X )
	jpeg? ( X )
	png? ( X )
	tiff? ( X )"

QA_PRESTRIPPED="usr/lib*/libesmod.so.*"
QA_TEXTRELS="${QA_PRESTRIPPED}"
QA_FLAGS_IGNORED="${QA_PRESTRIPPED}"

# Upstream ships broken sanity test
RESTRICT="test"

RDEPEND="dev-libs/libxml2
	media-gfx/iscan-data
	media-gfx/sane-backends
	virtual/udev
	virtual/libusb:1
	X? ( x11-libs/gtk+:2 )
	gimp? ( media-gfx/gimp )
	jpeg? ( virtual/jpeg:= )
	png? ( media-libs/libpng:= )
	tiff? ( media-libs/tiff:= )"

DEPEND="${RDEPEND}
	virtual/pkgconfig
	X? ( sys-devel/gettext )"

S="${WORKDIR}/${PN}-${MY_PV}"

src_prepare() {
	eapply_user
	local i

	# convert japanese docs to UTF-8
	if use l10n_ja; then
		for i in {NEWS,README}.ja non-free/*.ja.txt; do
			if [ -f "${i}" ]; then
				echo ">>> Converting ${i} to UTF-8"
				iconv -f eucjp -t utf8 -o "${i}~" "${i}" && mv -f "${i}~" "${i}" || rm -f "${i}~"
			fi
		done
	fi

	# disable checks for gtk+
	if ! use X; then
		sed -i -e "s:PKG_CHECK_MODULES(GTK,.*):AC_DEFINE([HAVE_GTK_2], 0):g" \
			-e "s:\(PKG_CHECK_MODULES(GDK_IMLIB,.*)\):#\1:g" configure.ac || die
	fi

	epatch "${FILESDIR}"/iscan-2.29.1-drop-ltdl.patch
	epatch "${FILESDIR}"/iscan-2.28.1.3+libpng-1.5.patch
	epatch "${FILESDIR}"/iscan-2.29.1-png-libs.patch
	epatch "${FILESDIR}"/iscan-2.30.1-fix-g++-test.patch
	epatch "${FILESDIR}"/iscan-2.30.1.1-gcc6.patch

	eautoreconf
}

src_configure() {
	append-cppflags -D_GNU_SOURCE  # needed for 'strndup'
	# Fix selector box bug 388073
	replace-flags "-O[0-9s]" "-O1"

	local myconf=(
		--enable-dependency-reduction
		--disable-static
		$(use_enable X frontend)
		$(use_enable gimp)
		$(use_enable jpeg)
		$(use_enable png)
		$(use_enable tiff)
	)
	econf ${myconf[@]}
}

src_install() {
	local MY_LIB="/usr/$(get_libdir)"
	emake DESTDIR="${D}" install || die "emake install failed"

	# install docs
	dodoc AUTHORS NEWS README
	use l10n_ja && dodoc NEWS.ja README.ja

	# install sane config
	insinto /etc/sane.d
	doins backend/epkowa.conf

	# install extra docs
	if use doc; then
		insinto /usr/share/doc/${PF}
		if use l10n_ja; then
			doins "${DISTDIR}/${MY_DOC}_j.pdf"
		else
			doins "${DISTDIR}/${MY_DOC}_e.pdf"
		fi
	fi

	# link iscan so it is seen as a plugin in gimp
	if use X && use gimp; then
		local plugindir
		if [ -x /usr/bin/gimptool ]; then
			plugindir="$(gimptool --gimpplugindir)/plug-ins" || die "Failed to get gimpplugindir"
		elif [ -x /usr/bin/gimptool-2.0 ]; then
			plugindir="$(gimptool-2.0 --gimpplugindir)/plug-ins" || die "Failed to get gimpplugindir"
		else
			die "Can't find GIMP plugin directory."
		fi
		dodir "${plugindir}"
		dosym /usr/bin/iscan "${plugindir}"/iscan
	fi

	# install desktop entry
	if use X; then
		make_desktop_entry iscan "Image Scan! for Linux ${PV}" scanner
	fi
}

pkg_postinst() {
	local i
	local DLL_CONF="/etc/sane.d/dll.conf"
	local EPKOWA_CONF="/etc/sane.d/epkowa.conf"

	elog
	if grep -q "^[ \t]*\<epkowa\>" ${DLL_CONF}; then
		elog "Please edit ${EPKOWA_CONF} to suit your needs."
	elif grep -q "\<epkowa\>" ${DLL_CONF}; then
		elog "Hint: to enable the backend, add 'epkowa' to ${DLL_CONF}"
		elog "Then edit ${EPKOWA_CONF} to suit your needs."
	else
		echo "epkowa" >> ${DLL_CONF}
		elog "A new entry 'epkowa' was added to ${DLL_CONF}"
		elog "Please edit ${EPKOWA_CONF} to suit your needs."
	fi
}