146 lines
5.1 KiB
Python
146 lines
5.1 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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# This script generates properties/descriptor binding webidl based on
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# ServoCSSPropList.
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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, dataFile, ruleType, interfaceName, bindingTemplate, pref=None):
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propsData = runpy.run_path(dataFile)["data"]
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output.write(
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"""/* THIS IS AN AUTOGENERATED FILE. DO NOT EDIT */
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* 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
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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[Exposed=Window"""
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)
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if pref:
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output.write(', Pref="' + pref + '"')
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output.write(
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"""]
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interface """
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+ interfaceName
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+ " : CSSStyleDeclaration {\n"
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)
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for p in propsData.values():
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# Skip properties which aren't valid in style rules.
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if ruleType not in p.rules:
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continue
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if p.type() == "alias":
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if p.pref == propsData[p.prop_id].pref:
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# We already added this as a BindingAlias for the original prop.
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continue
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propId = p.prop_id
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else:
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propId = p.id
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extendedAttrs = [
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"BindingTemplate=(%s, eCSSProperty_%s)" % (bindingTemplate, propId),
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"CEReactions",
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"SetterThrows",
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"SetterNeedsSubjectPrincipal=NonSystem",
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]
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if p.pref != "":
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assert "Internal" not in p.flags
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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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# MozTransform accessor is generated regardless, for compatibility,
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# see bug 1861828, 1865332, 1860424, 1864970, 1865332, 1869119.
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elif p.method not in ["MozTransform", "MozTransformOrigin"]:
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extendedAttrs.append('Pref="%s"' % p.pref)
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elif "EnabledInUASheetsAndChrome" in p.flags:
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extendedAttrs.append("ChromeOnly")
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elif "Internal" in p.flags:
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continue
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def add_extra_accessors(p):
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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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return prop
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prop = add_extra_accessors(p)
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if p.type() != "alias":
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for a in p.aliases:
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if p.pref == propsData[a].pref:
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newProp = add_extra_accessors(propsData[a])
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extendedAttrs.append('BindingAlias="%s"' % newProp)
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output.write(generateLine(prop, extendedAttrs))
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output.write("};")
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def generateCSS2Properties(output, dataFile):
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generate(output, dataFile, "Style", "CSS2Properties", "CSS2Property")
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def generateCSSPageDescriptors(output, dataFile):
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generate(
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output,
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dataFile,
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"Page",
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"CSSPageDescriptors",
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"CSSPageDescriptor",
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)
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def generateCSSPositionTryDescriptors(output, dataFile):
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generate(
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output,
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dataFile,
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"PositionTry",
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"CSSPositionTryDescriptors",
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"CSSPositionTryDescriptor",
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"layout.css.anchor-positioning.enabled",
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)
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