subset/svg_test: test more complex document with cross-references
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Cosimo Lupo
parent
a7216ae766
commit
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@ -1,4 +1,5 @@
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from string import ascii_letters
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import textwrap
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from fontTools.misc.testTools import getXML
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from fontTools import subset
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@ -111,3 +112,344 @@ def test_subset_svg_simple(empty_svg_font, tmp_path):
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' <![CDATA[<svg xmlns="http://www.w3.org/2000/svg"><path id="glyph6" d="M6,6"/></svg>]]>',
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"</svgDoc>",
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]
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# This contains a bunch of cross-references between glyphs, paths, gradients, etc.
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# Note the path coordinates are completely made up and not meant to be rendered.
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# We only care about the tree structure, not it's visual content.
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COMPLEX_SVG = """\
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<svg xmlns="http://www.w3.org/2000/svg"
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xmlns:xlink="http://www.w3.org/1999/xlink">
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<defs>
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<linearGradient id="lg1" x1="50" x2="50" y1="80" y2="80" gradientUnits="userSpaceOnUse">
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<stop stop-color="#A47B62" offset="0"/>
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<stop stop-color="#AD8264" offset="1.0"/>
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</linearGradient>
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<radialGradient id="rg2" cx="50" cy="50" r="10" gradientUnits="userSpaceOnUse">
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<stop stop-color="#A47B62" offset="0"/>
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<stop stop-color="#AD8264" offset="1.0"/>
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</radialGradient>
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<radialGradient id="rg3" xlink:href="#rg2" r="20"/>
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<radialGradient id="rg4" xlink:href="#rg3" cy="100"/>
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<path id="p1" d="M3,3"/>
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<clipPath id="c1">
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<circle cx="10" cy="10" r="1"/>
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</clipPath>
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</defs>
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<g id="glyph1">
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<g id="glyph2">
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<path d="M0,0"/>
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</g>
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<g>
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<path d="M1,1" fill="url(#lg1)"/>
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<path d="M2,2"/>
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</g>
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</g>
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<g id="glyph3">
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<use xlink:href="#p1"/>
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</g>
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<use id="glyph4" xlink:href="#glyph1" x="10"/>
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<use id="glyph5" xlink:href="#glyph2" y="-10"/>
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<g id="glyph6">
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<use xlink:href="#p1" transform="scale(2, 1)"/>
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</g>
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<g id="group1">
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<g id="glyph7">
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<path d="M4,4"/>
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</g>
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<g id="glyph8">
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<g id=".glyph8">
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<path id="p2" d="M5,5"/>
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<path id="p3" d="M6,6"/>
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</g>
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<path d="M7,7"/>
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</g>
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<g id="glyph9">
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<use xlink:href="#p2"/>
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</g>
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<g id="glyph10">
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<use xlink:href="#p3"/>
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</g>
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</g>
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<g id="glyph11">
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<path d="M7,7" fill="url(#rg4)"/>
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</g>
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<g id="glyph12">
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<path d="M7,7" style="fill:url(#lg1);stroke:red;clip-path:url(#c1)"/>
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</g>
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</svg>
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"""
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def _lines(s):
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return textwrap.dedent(s).splitlines()
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@pytest.mark.parametrize(
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"subset_gids, expected_xml",
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[
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# we only keep gid=2, with 'glyph2' defined inside 'glyph1': 'glyph2'
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# is renamed 'glyph1' to match the new subset indices, and the old 'glyph1'
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# is kept (as it contains 'glyph2') but renamed '.glyph1' to avoid clash
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(
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"2",
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_lines(
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"""\
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<svgDoc endGlyphID="1" startGlyphID="1">
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<![CDATA[<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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<g id=".glyph1">
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<g id="glyph1">
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<path d="M0,0"/>
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</g>
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</g>
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</svg>
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]]>
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</svgDoc>
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"""
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),
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),
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# we keep both gid 1 and 2: the glyph elements' ids stay as they are (only the
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# range endGlyphID change); a gradient is kept since it's referenced by glyph1
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(
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"1,2",
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_lines(
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"""\
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<svgDoc endGlyphID="2" startGlyphID="1">
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<![CDATA[<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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<defs>
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<linearGradient id="lg1" x1="50" x2="50" y1="80" y2="80" gradientUnits="userSpaceOnUse">
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<stop stop-color="#A47B62" offset="0"/>
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<stop stop-color="#AD8264" offset="1.0"/>
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</linearGradient>
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</defs>
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<g id="glyph1">
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<g id="glyph2">
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<path d="M0,0"/>
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</g>
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<g>
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<path d="M1,1" fill="url(#lg1)"/>
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<path d="M2,2"/>
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</g>
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</g>
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</svg>
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]]>
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</svgDoc>
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"""
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),
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),
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(
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# both gid 3 and 6 refer (via <use xlink:href="#...") to path 'p1', which
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# is thus kept in <defs>; the glyph ids and range start/end are renumbered.
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"3,6",
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_lines(
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"""\
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<svgDoc endGlyphID="2" startGlyphID="1">
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<![CDATA[<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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<defs>
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<path id="p1" d="M3,3"/>
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</defs>
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<g id="glyph1">
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<use xlink:href="#p1"/>
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</g>
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<g id="glyph2">
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<use xlink:href="#p1" transform="scale(2, 1)"/>
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</g>
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</svg>
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]]>
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</svgDoc>
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"""
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),
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),
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(
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# 'glyph4' uses the whole 'glyph1' element (translated); we keep the latter
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# renamed to avoid clashes with new gids
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"3-4",
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_lines(
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"""\
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<svgDoc endGlyphID="2" startGlyphID="1">
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<![CDATA[<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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<defs>
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<linearGradient id="lg1" x1="50" x2="50" y1="80" y2="80" gradientUnits="userSpaceOnUse">
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<stop stop-color="#A47B62" offset="0"/>
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<stop stop-color="#AD8264" offset="1.0"/>
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</linearGradient>
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<path id="p1" d="M3,3"/>
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</defs>
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<g id=".glyph1">
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<g id=".glyph2">
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<path d="M0,0"/>
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</g>
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<g>
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<path d="M1,1" fill="url(#lg1)"/>
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<path d="M2,2"/>
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</g>
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</g>
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<g id="glyph1">
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<use xlink:href="#p1"/>
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</g>
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<use id="glyph2" xlink:href="#.glyph1" x="10"/>
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</svg>
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]]>
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</svgDoc>
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"""
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),
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),
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(
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# 'glyph9' uses a path 'p2' defined inside 'glyph8', the latter is excluded
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# from our subset, as such its id is renamed with a '.' prefix; but (edge
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# case!) there already is an id=".glyph8" in the doc (for whatever reason,
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# it's still a valid id), so we append a .{digit} suffix to disambiguate.
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"7,9",
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_lines(
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"""\
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<svgDoc endGlyphID="2" startGlyphID="1">
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<![CDATA[<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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<g id="group1">
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<g id="glyph1">
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<path d="M4,4"/>
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</g>
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<g id=".glyph8.1">
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<g id=".glyph8">
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<path id="p2" d="M5,5"/>
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</g>
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</g>
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<g id="glyph2">
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<use xlink:href="#p2"/>
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</g>
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</g>
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</svg>
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]]>
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</svgDoc>
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"""
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),
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),
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(
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# 'glyph11' uses gradient 'rg4' which inherits from 'rg3', which inherits
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# from 'rg2', etc.
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"11",
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_lines(
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"""\
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<svgDoc endGlyphID="1" startGlyphID="1">
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<![CDATA[<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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<defs>
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<radialGradient id="rg2" cx="50" cy="50" r="10" gradientUnits="userSpaceOnUse">
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<stop stop-color="#A47B62" offset="0"/>
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<stop stop-color="#AD8264" offset="1.0"/>
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</radialGradient>
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<radialGradient id="rg3" xlink:href="#rg2" r="20"/>
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<radialGradient id="rg4" xlink:href="#rg3" cy="100"/>
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</defs>
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<g id="glyph1">
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<path d="M7,7" fill="url(#rg4)"/>
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</g>
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</svg>
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]]>
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</svgDoc>
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"""
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),
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),
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(
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# 'glyph12' contains a style attribute with inline CSS declarations that
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# contains references to a gradient fill and a clipPath: we keep those
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"12",
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_lines(
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"""\
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<svgDoc endGlyphID="1" startGlyphID="1">
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<![CDATA[<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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<defs>
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<linearGradient id="lg1" x1="50" x2="50" y1="80" y2="80" gradientUnits="userSpaceOnUse">
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<stop stop-color="#A47B62" offset="0"/>
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<stop stop-color="#AD8264" offset="1.0"/>
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</linearGradient>
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<clipPath id="c1">
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<circle cx="10" cy="10" r="1"/>
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</clipPath>
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</defs>
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<g id="glyph1">
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<path d="M7,7" style="fill:url(#lg1);stroke:red;clip-path:url(#c1)"/>
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</g>
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</svg>
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]]>
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</svgDoc>
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"""
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),
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),
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],
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)
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def test_subset_svg_with_references(
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empty_svg_font, tmp_path, subset_gids, expected_xml
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):
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font = empty_svg_font
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font["SVG "].docList.append((COMPLEX_SVG, 1, 12))
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svg_font_path = tmp_path / "TestSVG.ttf"
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font.save(svg_font_path)
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subset_path = svg_font_path.with_suffix(".subset.ttf")
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subset.main(
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[
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str(svg_font_path),
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f"--output-file={subset_path}",
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f"--gids={subset_gids}",
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"--pretty-svg",
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]
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)
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subset_font = TTFont(subset_path)
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if expected_xml is not None:
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assert getXML(subset_font["SVG "].toXML, subset_font) == expected_xml
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else:
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assert "SVG " not in subset_font
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def test_subset_svg_empty_table(empty_svg_font, tmp_path):
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font = empty_svg_font
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svg = new_svg()
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etree.SubElement(svg, "rect", {"id": "glyph1", "x": "1", "y": "2"})
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font["SVG "].docList.append((etree.tostring(svg).decode(), 1, 1))
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svg_font_path = tmp_path / "TestSVG.ttf"
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font.save(svg_font_path)
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subset_path = svg_font_path.with_suffix(".subset.ttf")
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# there's no gid=2 in SVG table, drop the empty table
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subset.main([str(svg_font_path), f"--output-file={subset_path}", f"--gids=2"])
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assert "SVG " not in TTFont(subset_path)
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def test_subset_svg_missing_glyph(empty_svg_font, tmp_path):
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font = empty_svg_font
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svg = new_svg()
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etree.SubElement(svg, "rect", {"id": "glyph1", "x": "1", "y": "2"})
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font["SVG "].docList.append(
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(
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etree.tostring(svg).decode(),
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1,
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# the range endGlyphID=2 declares two glyphs however our svg contains
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# only one glyph element with id="glyph1", the "glyph2" one is absent.
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# Techically this would be invalid according to the OT-SVG spec.
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2,
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)
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)
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svg_font_path = tmp_path / "TestSVG.ttf"
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font.save(svg_font_path)
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subset_path = svg_font_path.with_suffix(".subset.ttf")
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# make sure we don't crash when we don't find the expected "glyph2" element
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subset.main([str(svg_font_path), f"--output-file={subset_path}", f"--gids=1"])
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subset_font = TTFont(subset_path)
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assert getXML(subset_font["SVG "].toXML, subset_font) == [
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'<svgDoc endGlyphID="1" startGlyphID="1">',
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' <![CDATA[<svg xmlns="http://www.w3.org/2000/svg"><rect id="glyph1" x="1" y="2"/></svg>]]>',
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"</svgDoc>",
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]
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# ignore the missing gid even if included in the subset; in this test case we
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# end up with an empty svg document--which is dropped, along with the empty table
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subset.main([str(svg_font_path), f"--output-file={subset_path}", f"--gids=2"])
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assert "SVG " not in TTFont(subset_path)
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