#!/usr/bin/env bash

# icon-theme-installer
# Copyright (C) 2006 Novell, Inc.
# Written by Aaron Bockover <abock@gnome.org>
# Licensed under the MIT/X11 license
#
# This script is meant to be invoked from within a Makefile/Makefile.am
# in the install-data-local and uninstall-data sections. It handles the
# task of properly installing icons into the icon theme. It requires a
# few arguments to set up its environment, and a list of files to be
# installed. The format of the file list is critical:
#
# <category>,<local-src-file-name>
#
#   apps,music-player-banshee.svg
#   apps,music-player-banshee-16.png
#   apps,music-player-banshee-22.png
#
# <category> is the icon theme category, for instance, apps, devices,
# actions, emblems...
#
# <local-src-file-name> must have a basename in the form of:
#
#   proper-theme-name[-<SIZE>].<EXTENSION>
#
# Where <SIZE> should be either nothing, which will default to scalable
# or \-[0-9]{2}, which will expand to <SIZE>x<SIZE>. For example:
#
#   music-player-banshee-16.png
#
# The <SIZE> here is -16 and will expand to 16x16 per the icon theme spec
#
# What follows is an example Makefile.am for icon theme installation:
#
# ---------------
# theme=hicolor
# themedir=$(datadir)/icons/$(theme)
# theme_icons = \
#	apps,music-player-banshee.svg \
#	apps,music-player-banshee-16.png \
#	apps,music-player-banshee-22.png \
#	apps,music-player-banshee-24.png \
#	apps,music-player-banshee-32.png
#
# install_icon_exec = $(top_srcdir)/build/icon-theme-installer -t $(theme) -s $(srcdir) -d "x$(DESTDIR)" -b $(themedir) -m "$(mkinstalldirs)" -x "$(INSTALL_DATA)"
# install-data-local:
#	$(install_icon_exec) -i $(theme_icons)
#
#	uninstall-hook:
#		$(install_icon_exec) -u $(theme_icons)
#
#	MAINTAINERCLEANFILES = Makefile.in
#	EXTRA_DIST = $(wildcard *.svg *.png)
# ---------------
#
# Arguments to this program:
#
# -i         : Install
# -u         : Uninstall
# -t <theme> : Theme name (hicolor)
# -d <dir>   : Theme installation dest directory [x$(DESTDIR)] - Always prefix
#              this argument with x; it will be stripped but will act as a
#              placeholder for zero $DESTDIRs (only set by packagers)
# -b <dir>   : Theme installation directory [$(hicolordir)]
# -s <dir>   : Source directory [$(srcdir)]
# -m <exec>  : Command to exec for directory creation [$(mkinstalldirs)]
# -x <exec>  : Command to exec for single file installation [$(INSTALL_DATA)]
# <remainging> : All remainging should be category,filename pairs

while getopts "iut:b:d:s:m:x:" flag; do
	case "$flag" in
		i) INSTALL=yes ;;
		u) UNINSTALL=yes ;;
		t) THEME_NAME=$OPTARG ;;
		d) INSTALL_DEST_DIR=${OPTARG##x} ;;
		b) INSTALL_BASE_DIR=$OPTARG ;;
		s) SRC_DIR=$OPTARG ;;
		m) MKINSTALLDIRS_EXEC=$OPTARG ;;
		x) INSTALL_DATA_EXEC=$OPTARG ;;
	esac
done

shift $(($OPTIND - 1))

if test "x$INSTALL" = "xyes" -a "x$UNINSTALL" = "xyes"; then
	echo "Cannot pass both -i and -u"
	exit 1
elif test "x$INSTALL" = "x" -a "x$UNINSTALL" = "x"; then
	echo "Must path either -i or -u"
	exit 1
fi

if test -z "$THEME_NAME"; then
	echo "Theme name required (-t hicolor)"
	exit 1
fi

if test -z "$INSTALL_BASE_DIR"; then
	echo "Base theme directory required [-b \$(hicolordir)]"
	exit 1
fi

if test ! -x $(echo "$MKINSTALLDIRS_EXEC" | cut -f1 -d' '); then
	echo "Cannot find '$MKINSTALLDIRS_EXEC'; You probably want to pass -m \$(mkinstalldirs)"
	exit 1
fi

if test ! -x $(echo "$INSTALL_DATA_EXEC" | cut -f1 -d' '); then
	echo "Cannot find '$INSTALL_DATA_EXEC'; You probably want to pass -x \$(INSTALL_DATA)"
	exit 1
fi

if test -z "$SRC_DIR"; then
	SRC_DIR=.
fi

for icon in $@; do
	size=$(echo $icon | sed s/[^0-9]*//g)
	category=$(echo $icon | cut -d, -f1)
	build_name=$(echo $icon | cut -d, -f2)
	install_name=$(echo $build_name | sed "s/[0-9]//g; s/-\././")
	install_name=$(basename $install_name)

	if test -z $size; then 
		size=symbolic
		
		if [[ "${INSTALL_BASE_DIR}" == *ubuntu-mono-* ]]; then
			install_dir=${INSTALL_DEST_DIR}${INSTALL_BASE_DIR}/$category/$size
		else
			install_dir=${INSTALL_DEST_DIR}${INSTALL_BASE_DIR}/$size/$category
    	fi
	else
		if [[ "${INSTALL_BASE_DIR}" == *ubuntu-mono-* ]]; then
			install_dir=${INSTALL_DEST_DIR}${INSTALL_BASE_DIR}/$category/$size
		else
			size=${size}x${size};
			install_dir=${INSTALL_DEST_DIR}${INSTALL_BASE_DIR}/$size/$category
		fi	
	fi

	install_path=$install_dir/$install_name
	
	if test "x$INSTALL" = "xyes"; then
		echo "Installing $size $install_name into $THEME_NAME icon theme"
		
		$($MKINSTALLDIRS_EXEC $install_dir) || {
			echo "Failed to create directory $install_dir"
			exit 1
		}
		
		$($INSTALL_DATA_EXEC $SRC_DIR/$build_name $install_path) || {
			echo "Failed to install $SRC_DIR/$build_name into $install_path"
			exit 1
		}

		if test ! -e $install_path; then
			echo "Failed to install $SRC_DIR/$build_name into $install_path"
			exit 1
		fi
	else
		if test -e $install_path; then
			echo "Removing $size $install_name from $THEME_NAME icon theme"

			rm $install_path || { 
				echo "Failed to remove $install_path"
				exit 1
			}
		fi
	fi
done

gtk_update_icon_cache_bin="$((which gtk-update-icon-cache || echo /opt/gnome/bin/gtk-update-icon-cache)2>/dev/null)"
gtk_update_icon_cache="$gtk_update_icon_cache_bin -f -t $INSTALL_BASE_DIR"

if test -z "$INSTALL_DEST_DIR"; then 
	if test -x $gtk_update_icon_cache_bin; then 
		echo "Updating GTK icon cache"
		$gtk_update_icon_cache
	else
		echo "*** Icon cache not updated. Could not execute $gtk_update_icon_cache_bin"
	fi
else
	echo "*** Icon cache not updated. After (un)install, run this:"
	echo "***   $gtk_update_icon_cache"
fi