gecko-dev/dom/bindings/GenerateCSS2PropertiesWebIDL.py
Xidorn Quan d1caa962ed Bug 1471114 part 1 - Move CSSPropFlags prefix generation into GenerateServoCSSPropList.py. r=emilio
MozReview-Commit-ID: E5dl9V2B2dq

--HG--
extra : source : 6e2448ce3f4d9965749298a575795dfab926b9cb
2018-06-27 15:34:29 +10:00

79 lines
3.1 KiB
Python

# 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 sys
import string
import argparse
import runpy
# Generates a line of WebIDL with the given spelling of the property name
# (whether camelCase, _underscorePrefixed, etc.) and the given array of
# extended attributes.
def generateLine(propName, extendedAttrs):
return " [%s] attribute DOMString %s;\n" % (", ".join(extendedAttrs),
propName)
def generate(output, idlFilename, dataFile):
propList = runpy.run_path(dataFile)["data"]
props = ""
for p in propList:
if "Internal" in p.flags:
continue
# Unfortunately, even some of the getters here are fallible
# (e.g. on nsComputedDOMStyle).
extendedAttrs = ["CEReactions", "Throws", "TreatNullAs=EmptyString",
"SetterNeedsSubjectPrincipal=NonSystem"]
if p.pref is not "":
extendedAttrs.append('Pref="%s"' % p.pref)
prop = p.method
# webkit properties get a camelcase "webkitFoo" accessor
# as well as a capitalized "WebkitFoo" alias (added here).
if (prop.startswith("Webkit")):
extendedAttrs.append('BindingAlias="%s"' % prop)
# Generate a name with camelCase spelling of property-name (or capitalized,
# for Moz-prefixed properties):
if not prop.startswith("Moz"):
prop = prop[0].lower() + prop[1:]
# Per spec, what's actually supposed to happen here is that we're supposed
# to have properties for:
#
# 1) Each supported CSS property name, camelCased.
# 2) Each supported name that contains or starts with dashes,
# without any changes to the name.
# 3) cssFloat
#
# Note that "float" will cause a property called "float" to exist due to (1)
# in that list.
#
# In practice, cssFloat is the only case in which "name" doesn't contain
# "-" but also doesn't match "prop". So the generateLine() call will
# cover (3) and all of (1) except "float". If we now add an alias
# for all the cases where "name" doesn't match "prop", that will cover
# "float" and (2).
if prop != p.name:
extendedAttrs.append('BindingAlias="%s"' % p.name)
props += generateLine(prop, extendedAttrs)
idlFile = open(idlFilename, "r")
idlTemplate = idlFile.read()
idlFile.close()
output.write("/* THIS IS AN AUTOGENERATED FILE. DO NOT EDIT */\n\n" +
string.Template(idlTemplate).substitute({"props": props}) + '\n')
def main():
parser = argparse.ArgumentParser()
parser.add_argument('idlFilename', help='IDL property file template')
parser.add_argument('preprocessorHeader', help='Header file to pass through the preprocessor')
args = parser.parse_args()
generate(sys.stdout, args.idlFilename, args.preprocessorHeader)
if __name__ == '__main__':
main()