зеркало из https://github.com/mozilla/gecko-dev.git
105 строки
3.5 KiB
Python
105 строки
3.5 KiB
Python
# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this file,
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# You can obtain one at http://mozilla.org/MPL/2.0/.
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import sys
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import string
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import argparse
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import runpy
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# Generates a line of WebIDL with the given spelling of the property name
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# (whether camelCase, _underscorePrefixed, etc.) and the given array of
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# extended attributes.
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def generateLine(propName, extendedAttrs):
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return " [%s] attribute [LegacyNullToEmptyString] UTF8String %s;\n" % (
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", ".join(extendedAttrs),
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propName,
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)
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def generate(output, idlFilename, dataFile):
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propList = runpy.run_path(dataFile)["data"]
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props = ""
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for p in propList:
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if "Internal" in p.flags:
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continue
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# Skip properties which aren't valid in style rules.
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if "Style" not in p.rules:
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continue
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# Unfortunately, even some of the getters here are fallible
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# (e.g. on nsComputedDOMStyle).
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extendedAttrs = [
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"CEReactions",
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"Throws",
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"SetterNeedsSubjectPrincipal=NonSystem",
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]
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if p.pref != "":
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# BackdropFilter is a special case where we want WebIDL to check
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# a function instead of checking the pref directly.
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if p.method == "BackdropFilter":
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extendedAttrs.append('Func="nsCSSProps::IsBackdropFilterAvailable"')
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else:
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extendedAttrs.append('Pref="%s"' % p.pref)
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prop = p.method
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# webkit properties get a camelcase "webkitFoo" accessor
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# as well as a capitalized "WebkitFoo" alias (added here).
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if prop.startswith("Webkit"):
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extendedAttrs.append('BindingAlias="%s"' % prop)
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# Generate a name with camelCase spelling of property-name (or capitalized,
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# for Moz-prefixed properties):
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if not prop.startswith("Moz"):
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prop = prop[0].lower() + prop[1:]
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# Per spec, what's actually supposed to happen here is that we're supposed
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# to have properties for:
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#
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# 1) Each supported CSS property name, camelCased.
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# 2) Each supported name that contains or starts with dashes,
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# without any changes to the name.
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# 3) cssFloat
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#
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# Note that "float" will cause a property called "float" to exist due to (1)
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# in that list.
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#
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# In practice, cssFloat is the only case in which "name" doesn't contain
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# "-" but also doesn't match "prop". So the generateLine() call will
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# cover (3) and all of (1) except "float". If we now add an alias
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# for all the cases where "name" doesn't match "prop", that will cover
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# "float" and (2).
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if prop != p.name:
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extendedAttrs.append('BindingAlias="%s"' % p.name)
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props += generateLine(prop, extendedAttrs)
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idlFile = open(idlFilename, "r")
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idlTemplate = idlFile.read()
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idlFile.close()
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output.write(
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"/* THIS IS AN AUTOGENERATED FILE. DO NOT EDIT */\n\n"
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+ string.Template(idlTemplate).substitute({"props": props})
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+ "\n"
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)
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def main():
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parser = argparse.ArgumentParser()
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parser.add_argument("idlFilename", help="IDL property file template")
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parser.add_argument(
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"preprocessorHeader", help="Header file to pass through the preprocessor"
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)
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args = parser.parse_args()
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generate(sys.stdout, args.idlFilename, args.preprocessorHeader)
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if __name__ == "__main__":
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main()
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