# MIT License
#
# Copyright The SCons Foundation
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

"""Common PDF Builder definition.

This is for various other Tool modules that use it.
Add an explicit action to run epstopdf to convert .eps files to .pdf
"""

import SCons.Builder
import SCons.Tool

PDFBuilder = None

EpsPdfAction = SCons.Action.Action('$EPSTOPDFCOM', '$EPSTOPDFCOMSTR')

def generate(env) -> None:
    try:
        env['BUILDERS']['PDF']
    except KeyError:
        global PDFBuilder
        if PDFBuilder is None:
            PDFBuilder = SCons.Builder.Builder(action = {},
                                               source_scanner = SCons.Tool.PDFLaTeXScanner,
                                               prefix = '$PDFPREFIX',
                                               suffix = '$PDFSUFFIX',
                                               emitter = {},
                                               source_ext_match = None,
                                               single_source=True)
        env['BUILDERS']['PDF'] = PDFBuilder

    env['PDFPREFIX'] = ''
    env['PDFSUFFIX'] = '.pdf'

# put the epstopdf builder in this routine so we can add it after
# the pdftex builder so that one is the default for no source suffix
def generate2(env) -> None:
    bld = env['BUILDERS']['PDF']
    #bld.add_action('.ps',  EpsPdfAction) # this is covered by direct Ghostcript action in gs.py
    bld.add_action('.eps', EpsPdfAction)

    env['EPSTOPDF']      = 'epstopdf'
    env['EPSTOPDFFLAGS'] = SCons.Util.CLVar('')
    env['EPSTOPDFCOM']   = '$EPSTOPDF $EPSTOPDFFLAGS ${SOURCE} --outfile=${TARGET}'

def exists(env) -> bool:
    # This only puts a skeleton Builder in place, so if someone
    # references this Tool directly, it's always "available."
    return True

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