EXTRA_DIST = doc src

# List of element IDs that we use in the HTML document.
PRECIOUS_IDS =  \
  bus           \
  city          \
  citycopy      \
  codebg        \
  codetext      \
  clouds        \
  cloudscopy    \
  train         \
  tram          \
  trees         \
  treescopy     \
  serviceid     \
  servicename   \
  sky           \
  ticket        \
  ticketdate    \
  tickettime

# Optimize our SVG once using XSL, to catch a few things
# that "scour" misses.
tableau.min.svg: tableau.svg svgclean.xsl
	@XSLTPROC@ svgclean.xsl $< > $@

# Optimize our SVG again, and remove its XML prologue so that it can
# be included directly into the HTML document.
tableau.min.min.svg: tableau.min.svg
	@SCOUR@ --protect-ids-list=$$(echo $(PRECIOUS_IDS) | tr ' ' ',') \
                --enable-id-stripping \
                --enable-comment-stripping \
                --remove-descriptive-elements \
                --no-renderer-workaround \
                --strip-xml-prolog \
                --no-line-breaks \
                --error-on-flowtext \
                $< > $@

# Use FontForge to convert the sfd source files to woff2.
.sfd.woff2:
	@FONTFORGE@ -script sfd2woff.ff $<

# Base64-encode a woff2 (web open font format 2.0) file. We use this
# to embed fonts directly into the CSS that requires them.
.woff2.base64:
	@BASE64@ -w0 $< > $@

# Build index.html by substituting the contents of a few (single
# line!) files into @PLACEHOLDERS@ within index.html.in. If you put
# tildes in tableau.svg this will probably break, so please don't do
# that.
index.html: index.html.in tableau.min.min.svg CharmBypass-Regular.base64 CharmBypass-Bold.base64
	sed -e "s~@CBPREGULAR@~$$(cat CharmBypass-Regular.base64)~" \
            -e "s~@CBPBOLD@~$$(cat CharmBypass-Bold.base64)~" \
            -e "s~@SVGDATA@~$$(cat tableau.min.min.svg)~" \
            $< > $@

# If you really want to, we support installing index.html
# to (say) /usr/share/charm-bypass/index.html.
dist_pkgdata_DATA = index.html

# Automake doesn't understand our wacky build process so we have to
# tell it which files are produced by running "make"
CLEANFILES = $(dist_pkgdata_DATA) \
             CharmBypass-Regular.base64 \
             CharmBypass-Bold.base64 \
             tableau.min.svg \
             tableau.min.min.svg