1 files changed, 169 insertions, 0 deletions
diff --git a/layout/style/ServoCSSPropList.mako.py b/layout/style/ServoCSSPropList.mako.py
new file mode 100644
index 0000000000..56061288d5
--- /dev/null
+++ b/layout/style/ServoCSSPropList.mako.py
@@ -0,0 +1,169 @@
+# 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/.
+
+def _assign_slots(obj, args):
+    for i, attr in enumerate(obj.__slots__):
+        setattr(obj, attr, args[i])
+
+
+class Longhand(object):
+    __slots__ = ["name", "method", "id", "rules", "flags", "pref", "aliases"]
+
+    def __init__(self, *args):
+        _assign_slots(self, args)
+
+    @staticmethod
+    def type():
+        return "longhand"
+
+
+class Shorthand(object):
+    __slots__ = ["name", "method", "id", "rules", "flags", "pref", "subprops", "aliases"]
+
+    def __init__(self, *args):
+        _assign_slots(self, args)
+
+    @staticmethod
+    def type():
+        return "shorthand"
+
+
+class Alias(object):
+    __slots__ = ["name", "method", "alias_id", "prop_id", "rules", "flags", "pref"]
+
+    def __init__(self, *args):
+        _assign_slots(self, args)
+
+    @staticmethod
+    def type():
+        return "alias"
+
+<%!
+# See bug 1454823 for situation of internal flag.
+def is_internal(prop):
+    # A property which is not controlled by pref and not enabled in
+    # content by default is an internal property.
+    return not prop.gecko_pref and not prop.enabled_in_content()
+
+def method(prop):
+    if prop.name == "float":
+        return "CssFloat"
+    if prop.name.startswith("-x-"):
+        return prop.camel_case[1:]
+    return prop.camel_case
+
+# TODO(emilio): Get this to zero.
+LONGHANDS_NOT_SERIALIZED_WITH_SERVO = [
+    # Servo serializes one value when both are the same, a few tests expect two.
+    "border-spacing",
+
+    # These resolve auto to zero in a few cases, but not all.
+    "max-height",
+    "max-width",
+    "min-height",
+    "min-width",
+
+    # resistfingerprinting stuff.
+    "-moz-osx-font-smoothing",
+
+    # Layout dependent.
+    "width",
+    "height",
+    "grid-template-rows",
+    "grid-template-columns",
+    "perspective-origin",
+    "transform-origin",
+    "transform",
+    "top",
+    "right",
+    "bottom",
+    "left",
+    "border-top-width",
+    "border-right-width",
+    "border-bottom-width",
+    "border-left-width",
+    "margin-top",
+    "margin-right",
+    "margin-bottom",
+    "margin-left",
+    "padding-top",
+    "padding-right",
+    "padding-bottom",
+    "padding-left",
+]
+
+def serialized_by_servo(prop):
+    if prop.type() == "shorthand" or prop.type() == "alias":
+        return True
+    # Keywords are all fine, except -moz-osx-font-smoothing, which does
+    # resistfingerprinting stuff.
+    if prop.keyword and prop.name != "-moz-osx-font-smoothing":
+        return True
+    return prop.name not in LONGHANDS_NOT_SERIALIZED_WITH_SERVO
+
+def exposed_on_getcs(prop):
+    if "Style" not in prop.rule_types_allowed_names():
+        return False
+    if is_internal(prop):
+        return False
+    return True
+
+def rules(prop):
+    return ", ".join('"{}"'.format(rule) for rule in prop.rule_types_allowed_names())
+
+RUST_TO_CPP_FLAGS = {
+  "CAN_ANIMATE_ON_COMPOSITOR": "CanAnimateOnCompositor",
+  "AFFECTS_LAYOUT": "AffectsLayout",
+  "AFFECTS_PAINT": "AffectsPaint",
+  "AFFECTS_OVERFLOW": "AffectsOverflow",
+}
+
+def flags(prop):
+    result = []
+    if prop.explicitly_enabled_in_chrome():
+        result.append("EnabledInUASheetsAndChrome")
+    elif prop.explicitly_enabled_in_ua_sheets():
+        result.append("EnabledInUASheets")
+    if is_internal(prop):
+        result.append("Internal")
+    if prop.enabled_in == "":
+        result.append("Inaccessible")
+    for (k, v) in RUST_TO_CPP_FLAGS.items():
+        if k in prop.flags:
+            result.append(v)
+    if exposed_on_getcs(prop):
+        result.append("ExposedOnGetCS")
+        if prop.type() == "shorthand" and "SHORTHAND_IN_GETCS" in prop.flags:
+            result.append("ShorthandUnconditionallyExposedOnGetCS")
+        if serialized_by_servo(prop):
+            result.append("SerializedByServo")
+    if prop.type() == "longhand" and prop.logical:
+        result.append("IsLogical")
+    return ", ".join('"{}"'.format(flag) for flag in result)
+
+def pref(prop):
+    if prop.gecko_pref:
+        return '"' + prop.gecko_pref + '"'
+    return '""'
+
+def sub_properties(prop):
+    return ", ".join('"{}"'.format(p.ident) for p in prop.sub_properties)
+
+def aliases(prop):
+    return ", ".join('"{}"'.format(p.ident) for p in prop.aliases)
+%>
+
+data = {
+% for prop in data.longhands:
+    "${prop.ident}": Longhand("${prop.name}", "${method(prop)}", "${prop.ident}", [${rules(prop)}], [${flags(prop)}], ${pref(prop)}, [${aliases(prop)}]),
+% endfor
+
+% for prop in data.shorthands:
+    "${prop.ident}": Shorthand("${prop.name}", "${prop.camel_case}", "${prop.ident}", [${rules(prop)}], [${flags(prop)}], ${pref(prop)}, [${sub_properties(prop)}], [${aliases(prop)}]),
+% endfor
+
+% for prop in data.all_aliases():
+    "${prop.ident}": Alias("${prop.name}", "${prop.camel_case}", "${prop.ident}", "${prop.original.ident}", [${rules(prop)}], [${flags(prop)}], ${pref(prop)}),
+% endfor
+}