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import gzip
import io
import struct
from fontTools.misc import etree
from fontTools.misc.testTools import getXML, parseXML
from fontTools.ttLib import TTFont
from fontTools.ttLib.tables.S_V_G_ import table_S_V_G_
import pytest
def dump(table, ttFont=None):
print("\n".join(getXML(table.toXML, ttFont)))
def compress(data: bytes) -> bytes:
buf = io.BytesIO()
with gzip.GzipFile(None, "w", fileobj=buf, mtime=0) as gz:
gz.write(data)
return buf.getvalue()
def strip_xml_whitespace(xml_string):
def strip_or_none(text):
text = text.strip() if text else None
return text if text else None
tree = etree.fromstring(xml_string)
for e in tree.iter("*"):
e.text = strip_or_none(e.text)
e.tail = strip_or_none(e.tail)
return etree.tostring(tree, encoding="utf-8")
SVG_DOCS = [
strip_xml_whitespace(svg)
for svg in (
b"""\
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1">
<defs>
<rect x="100" y="-200" width="300" height="400" id="p1"/>
</defs>
<g id="glyph1">
<use xlink:href="#p1" fill="#red"/>
</g>
<g id="glyph2">
<use xlink:href="#p1" fill="#blue"/>
</g>
<g id="glyph4">
<use xlink:href="#p1" fill="#green"/>
</g>
</svg>""",
b"""\
<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
<g id="glyph3">
<path d="M0,0 L100,0 L50,100 Z" fill="#red"/>
<path d="M10,10 L110,10 L60,110 Z" fill="#blue"/>
<path d="M20,20 L120,20 L70,120 Z" fill="#green"/>
</g>
</svg>""",
)
]
OTSVG_DATA = b"".join(
[
# SVG table header
b"\x00\x00" # version (0)
b"\x00\x00\x00\x0a" # offset to SVGDocumentList (10)
b"\x00\x00\x00\x00" # reserved (0)
# SVGDocumentList
b"\x00\x03" # number of SVGDocumentRecords (3)
# SVGDocumentRecord[0]
b"\x00\x01" # startGlyphID (1)
b"\x00\x02" # endGlyphID (2)
b"\x00\x00\x00\x26" # svgDocOffset (2 + 12*3 == 38 == 0x26)
+ struct.pack(">L", len(SVG_DOCS[0])) # svgDocLength
# SVGDocumentRecord[1] (compressed)
+ b"\x00\x03" # startGlyphID (3)
b"\x00\x03" # endGlyphID (3)
+ struct.pack(">L", 0x26 + len(SVG_DOCS[0])) # svgDocOffset
+ struct.pack(">L", len(compress(SVG_DOCS[1]))) # svgDocLength
# SVGDocumentRecord[2]
+ b"\x00\x04" # startGlyphID (4)
b"\x00\x04" # endGlyphID (4)
b"\x00\x00\x00\x26" # svgDocOffset (38); records 0 and 2 point to same SVG doc
+ struct.pack(">L", len(SVG_DOCS[0])) # svgDocLength
]
+ [SVG_DOCS[0], compress(SVG_DOCS[1])]
)
OTSVG_TTX = [
'<svgDoc endGlyphID="2" startGlyphID="1">',
f" <![CDATA[{SVG_DOCS[0].decode()}]]>",
"</svgDoc>",
'<svgDoc compressed="1" endGlyphID="3" startGlyphID="3">',
f" <![CDATA[{SVG_DOCS[1].decode()}]]>",
"</svgDoc>",
'<svgDoc endGlyphID="4" startGlyphID="4">',
f" <![CDATA[{SVG_DOCS[0].decode()}]]>",
"</svgDoc>",
]
@pytest.fixture
def font():
font = TTFont()
font.setGlyphOrder([".notdef"] + ["glyph%05d" % i for i in range(1, 30)])
return font
def test_decompile_and_compile(font):
table = table_S_V_G_()
table.decompile(OTSVG_DATA, font)
assert table.compile(font) == OTSVG_DATA
def test_decompile_and_dump_ttx(font):
table = table_S_V_G_()
table.decompile(OTSVG_DATA, font)
dump(table, font)
assert getXML(table.toXML, font) == OTSVG_TTX
def test_load_from_ttx_and_compile(font):
table = table_S_V_G_()
for name, attrs, content in parseXML(OTSVG_TTX):
table.fromXML(name, attrs, content, font)
assert table.compile(font) == OTSVG_DATA
def test_round_trip_ttx(font):
table = table_S_V_G_()
for name, attrs, content in parseXML(OTSVG_TTX):
table.fromXML(name, attrs, content, font)
compiled = table.compile(font)
table = table_S_V_G_()
table.decompile(compiled, font)
assert getXML(table.toXML, font) == OTSVG_TTX
def test_unpack_svg_doc_as_3_tuple():
# test that the legacy docList as list of 3-tuples interface still works
# even after the new SVGDocument class with extra `compressed` attribute
# was added
table = table_S_V_G_()
table.decompile(OTSVG_DATA, font)
for doc, compressed in zip(table.docList, (False, True, False)):
assert len(doc) == 3
data, startGID, endGID = doc
assert doc.data == data
assert doc.startGlyphID == startGID
assert doc.endGlyphID == endGID
assert doc.compressed == compressed
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