gecko-dev/dom/bindings/GenerateCSS2PropertiesWebIDL.py

58 lines
2.6 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
propList = eval(sys.stdin.read())
props = ""
for [name, prop, id, flags, pref] in propList:
extendedAttrs = ["Throws", "TreatNullAs=EmptyString"]
# To limit the overhead of Func= annotations, we only generate them when
# necessary, which is when the
# CSS_PROPERTY_ALWAYS_ENABLED_IN_CHROME_OR_CERTIFIED_APP flag is set.
# Otherwise, we try to get by with just a Pref= annotation or no annotation
# at all.
if "CSS_PROPERTY_ALWAYS_ENABLED_IN_CHROME_OR_CERTIFIED_APP" in flags:
extendedAttrs.append('Func="IsCSSPropertyExposedToJS<eCSSProperty_%s>"' % id)
# The following is an 'elif' because it is the responsibility of
# IsCSSPropertyExposedToJS to handle the pref if there is one.
elif pref is not "":
extendedAttrs.append('Pref="%s"' % pref)
if not prop.startswith("Moz"):
prop = prop[0].lower() + prop[1:]
# Unfortunately, even some of the getters here are fallible
# (e.g. on nsComputedDOMStyle).
props += " [%s] attribute DOMString %s;\n" % (", ".join(extendedAttrs),
prop)
# 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 dashes but doesn't start with a
# dash, 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 stuff we did with "prop" covers (3)
# and all of (1) except "float". If we now output attributes for all the
# cases where "name" doesn't match "prop" and "name" doesn't start with "-",
# that will cover "float" and (2).
if prop != name and name[0] != "-":
extendedAttrs.append('BinaryName="%s"' % prop)
# Throw in a '_' before the attribute name, because some of these
# property names collide with IDL reserved words.
props += " [%s] attribute DOMString _%s;\n" % (", ".join(extendedAttrs),
name)
idlFile = open(sys.argv[1], "r");
idlTemplate = idlFile.read();
idlFile.close();
print ("/* THIS IS AN AUTOGENERATED FILE. DO NOT EDIT */\n\n" +
string.Template(idlTemplate).substitute({ "props": props }))