87 lines
3.5 KiB
Python
87 lines
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 subprocess
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import buildconfig
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from mozbuild import shellutil
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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 DOMString %s;\n" % (", ".join(extendedAttrs),
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propName)
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def generate(output, idlFilename, preprocessorHeader):
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print(idlFilename)
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sys.stdout.flush()
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cpp = list(buildconfig.substs['CPP'])
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cpp += shellutil.split(buildconfig.substs['ACDEFINES'])
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cpp.append(preprocessorHeader)
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preprocessed = subprocess.check_output(cpp)
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propList = eval(preprocessed)
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props = ""
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for [name, prop, id, flags, pref, proptype] in propList:
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if "CSS_PROPERTY_INTERNAL" in flags:
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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 = ["Throws", "TreatNullAs=EmptyString"]
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if pref is not "":
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extendedAttrs.append('Pref="%s"' % pref)
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# webkit properties get a capitalized "WebkitFoo" accessor (added here)
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# as well as a camelcase "webkitFoo" accessor (added next).
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if (prop.startswith("Webkit")):
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props += generateLine(prop, extendedAttrs)
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# Generate a line 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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props += generateLine(prop, extendedAttrs)
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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 above generatePropLine() call
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# covered (3) and all of (1) except "float". If we now output attributes
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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 != name:
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extendedAttrs.append('BinaryName="%s"' % prop)
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# Throw in a '_' before the attribute name, because some of these
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# property names collide with IDL reserved words.
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props += generateLine("_" + name, 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("/* THIS IS AN AUTOGENERATED FILE. DO NOT EDIT */\n\n" +
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string.Template(idlTemplate).substitute({"props": props}) + '\n')
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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('preprocessorHeader', help='Header file to pass through the preprocessor')
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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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