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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this file,
# You can obtain one at http://mozilla.org/MPL/2.0/.
import runpy
FILE = """/* THIS IS AN AUTOGENERATED FILE. DO NOT EDIT */
/* processed file that defines entries for nsComputedDOMStyle, designed
to be #included in nsComputedDOMStyle.cpp */
static constexpr size_t kEntryIndices[eCSSProperty_COUNT] = {{
{indices}
}};
{asserts}
static constexpr Entry kEntries[eCSSProperty_COUNT] = {{
{entries}
}};
"""
def generate(output, dataFile):
def order_key(p):
# Put prefixed properties after normal properties.
# The spec is unclear about this, and Blink doesn't have any sensible
# order at all, so it probably doesn't matter a lot. But originally
# Gecko put then later so we do so as well. See w3c/csswg-drafts#2827.
order = p.name.startswith("-")
return (order, p.name)
def has_cpp_getter(p):
if not "ExposedOnGetCS" in p.flags:
return False
if "SerializedByServo" in p.flags:
return False
if p.type() == "longhand" and "IsLogical" in p.flags:
return False
return True
def getter_entry(p):
if has_cpp_getter(p):
return "DoGet" + p.method
# Put a dummy getter here instead of nullptr because MSVC seems
# to have bug which ruins the table when we put nullptr for
# pointer-to-member-function. See bug 1471426.
return "DummyGetter"
properties = runpy.run_path(dataFile)["data"]
entries = []
indices = []
asserts = []
index_map = {}
non_aliases = list(filter(lambda p: p.type() != "alias", properties.values()))
for i, p in enumerate(sorted(non_aliases, key=order_key)):
can_be_exposed = "true" if "ExposedOnGetCS" in p.flags else "false"
entries.append(
"{{ eCSSProperty_{}, {}, &nsComputedDOMStyle::{}}}".format(
p.id, can_be_exposed, getter_entry(p)
)
)
index_map[p.id] = i
i += 1
for i, p in enumerate(non_aliases):
indices.append(str(index_map[p.id]))
asserts.append(
'static_assert(size_t(eCSSProperty_{}) == {}, "");'.format(p.id, i)
)
assert len(indices) == len(entries)
output.write(
FILE.format(
indices=", ".join(indices),
entries=",\n ".join(entries),
asserts="\n".join(asserts),
)
)
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