#!/bin/bash
#
# docbook_prepareStyles.sh -- This function prepares styles' final
# instances used in transformations based on XSL or DSL templates.
# There are translation markers inside the XSL and DSL templates that
# need to be expanded before they can be used for transformations.
# This function creates temporal instances of XSL and DSL templates
# with translation markers expanded inside so as for transformation
# commands (e.g., `xmltproc' or `openjade' through `docbook2pdf') to
# use as style defintion.
#
# Copyright (C) 2009-2013 The CentOS Project
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or (at
# your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
# ----------------------------------------------------------------------
# $Id$
# ----------------------------------------------------------------------

function docbook_prepareStyles {

    local STYLE_TEMPLATE_FILE=''
    local STYLE_TEMPLATE_FILES=$@
    local STYLE_INSTANCE_COMMON=''
    local COUNT=0

    for STYLE_TEMPLATE_FILE in $STYLE_TEMPLATE_FILES;do

        STYLE_TEMPLATE[((++${#STYLE_TEMPLATE[*]}))]="${STYLE_TEMPLATE_FILE}"
        STYLE_INSTANCE[((++${#STYLE_INSTANCE[*]}))]="$(cli_getTemporalFile ${STYLE_TEMPLATE_FILE})"

        # Keep track of array's real index value. Remember, it starts
        # at zero but counting starts at 1 instead. So, substracting 1
        # from counting we have the real index value we need to work
        # with the information stored in the array.
        COUNT=$(( ${#STYLE_INSTANCE[*]} - 1 ))

        # Create style instance from style template.
        cp ${STYLE_TEMPLATE[$COUNT]} ${STYLE_INSTANCE[$COUNT]}

        # Define both final an common style instances based on style
        # templates.
        if [[ $STYLE_TEMPLATE_FILE =~ 'docbook2fo\.xsl$' ]];then
            STYLE_INSTANCE_FINAL=${STYLE_INSTANCE[$COUNT]}
        elif [[ $STYLE_TEMPLATE_FILE =~ 'docbook2pdf\.dsl$' ]];then
            STYLE_INSTANCE_FINAL=${STYLE_INSTANCE[${COUNT}]}
        elif [[ $STYLE_TEMPLATE_FILE =~ 'docbook2xhtml-(chunks|single)\.xsl$' ]];then
            STYLE_INSTANCE_FINAL=${STYLE_INSTANCE[${COUNT}]}
        elif [[ $STYLE_TEMPLATE_FILE =~ 'docbook2xhtml-common\.xsl$' ]];then
            STYLE_INSTANCE_COMMON=${STYLE_INSTANCE[${COUNT}]}
        fi

    done

    # Verify style final instance. This is the file used by
    # transformation command (`xsltproc' or `openjade') to produce the
    # specified output. We cannot continue without it.
    cli_checkFiles -e $STYLE_INSTANCE_FINAL

    # Expand common translation markers in the common style instance,
    # if it exists.
    if [[ -f $STYLE_INSTANCE_COMMON ]];then
        cli_expandTMarkers $STYLE_INSTANCE_COMMON
    fi

    # Expand specific translation markers in final style instance.
    sed -r -i "s!=STYLE_XHTML_COMMON=!${STYLE_INSTANCE_COMMON}!" ${STYLE_INSTANCE_FINAL}

}