Quelle GenerateCSSPropListWebIDL.py
Sprache: 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/.
# This script generates properties/descriptor binding webidl based on # ServoCSSPropList.
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 [LegacyNullToEmptyString] UTF8String %s;\n" % ( ", ".join(extendedAttrs),
propName,
)
def generate(output, dataFile, ruleType, interfaceName, bindingTemplate, pref=None):
propsData = runpy.run_path(dataFile)["data"]
output.write( """/* THIS IS AN AUTOGENERATED FILE. DO NOT EDIT */
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 https://mozilla.org/MPL/2.0/. */
[Exposed=Window"""
) if pref:
output.write(', Pref="' + pref + '"')
output.write( """]
interface """
+ interfaceName
+ " : CSSStyleDeclaration {\n"
) for p in propsData.values(): # Skip properties which aren't valid in style rules. if ruleType notin p.rules: continue
if p.type() == "alias": if p.pref == propsData[p.prop_id].pref: # We already added this as a BindingAlias for the original prop. continue
if p.pref != "": assert"Internal"notin p.flags # BackdropFilter is a special case where we want WebIDL to check # a function instead of checking the pref directly. if p.method == "BackdropFilter":
extendedAttrs.append('Func="nsCSSProps::IsBackdropFilterAvailable"') # MozTransform accessor is generated regardless, for compatibility, # see bug 1861828, 1865332, 1860424, 1864970, 1865332, 1869119. elif p.method notin ["MozTransform", "MozTransformOrigin"]:
extendedAttrs.append('Pref="%s"' % p.pref) elif"EnabledInUASheetsAndChrome"in p.flags:
extendedAttrs.append("ChromeOnly") elif"Internal"in p.flags: continue
def add_extra_accessors(p):
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): ifnot 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)
return prop
prop = add_extra_accessors(p)
if p.type() != "alias": for a in p.aliases: if p.pref == propsData[a].pref:
newProp = add_extra_accessors(propsData[a])
extendedAttrs.append('BindingAlias="%s"' % newProp)
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