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# 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/.
import os
import sys
import json
import re
SCRIPT_PATH = os.path.abspath(os.path.dirname(__file__))
SERVO_ROOT = os.path.abspath(os.path.join(SCRIPT_PATH, "..", "..", ".."))
FILTER_PATTERN = re.compile("// skip-unless ([A-Z_]+)\n")
def main():
os.chdir(os.path.join(os.path.dirname(__file__)))
sys.path.insert(0, os.path.join(SERVO_ROOT, "third_party", "WebIDL"))
sys.path.insert(0, os.path.join(SERVO_ROOT, "third_party", "ply"))
css_properties_json, out_dir = sys.argv[1:]
# Four dotdots: /path/to/target(4)/debug(3)/build(2)/style-*(1)/out
# Do not ascend above the target dir, because it may not be called target
# or even have a parent (see CARGO_TARGET_DIR).
doc_servo = os.path.join(out_dir, "..", "..", "..", "..", "doc")
webidls_dir = os.path.join(SCRIPT_PATH, "..", "webidls")
config_file = "Bindings.conf"
import WebIDL
from Configuration import Configuration
from CodegenRust import CGBindingRoot
parser = WebIDL.Parser(make_dir(os.path.join(out_dir, "cache")))
webidls = [name for name in os.listdir(webidls_dir) if name.endswith(".webidl")]
for webidl in webidls:
filename = os.path.join(webidls_dir, webidl)
with open(filename, "r", encoding="utf-8") as f:
contents = f.read()
filter_match = FILTER_PATTERN.search(contents)
if filter_match:
env_var = filter_match.group(1)
if not os.environ.get(env_var):
continue
parser.parse(contents, filename)
add_css_properties_attributes(css_properties_json, parser)
parser_results = parser.finish()
config = Configuration(config_file, parser_results)
make_dir(os.path.join(out_dir, "Bindings"))
for name, filename in [
("PrototypeList", "PrototypeList.rs"),
("RegisterBindings", "RegisterBindings.rs"),
("InterfaceObjectMap", "InterfaceObjectMap.rs"),
("InterfaceObjectMapData", "InterfaceObjectMapData.json"),
("InterfaceTypes", "InterfaceTypes.rs"),
("InheritTypes", "InheritTypes.rs"),
("Bindings", "Bindings/mod.rs"),
("UnionTypes", "UnionTypes.rs"),
("DomTypes", "DomTypes.rs"),
("DomTypeHolder", "DomTypeHolder.rs"),
]:
generate(config, name, os.path.join(out_dir, filename))
make_dir(doc_servo)
generate(config, "SupportedDomApis", os.path.join(doc_servo, "apis.html"))
for webidl in webidls:
filename = os.path.join(webidls_dir, webidl)
prefix = "Bindings/%sBinding" % webidl[:-len(".webidl")]
module = CGBindingRoot(config, prefix, filename).define()
if module:
with open(os.path.join(out_dir, prefix + ".rs"), "wb") as f:
f.write(module.encode("utf-8"))
def make_dir(path):
if not os.path.exists(path):
os.makedirs(path)
return path
def generate(config, name, filename):
from CodegenRust import GlobalGenRoots
root = getattr(GlobalGenRoots, name)(config)
code = root.define()
with open(filename, "wb") as f:
f.write(code.encode("utf-8"))
def add_css_properties_attributes(css_properties_json, parser):
def map_preference_name(preference_name: str):
"""Map between Stylo preference names and Servo preference names as the
`css-properties.json` file is generated by Stylo. This should be kept in sync with the
preference mapping done in `components/servo_config/prefs.rs`, which handles the runtime version of
these preferences."""
MAPPING = [
["layout.unimplemented", "layout_unimplemented"],
["layout.threads", "layout_threads"],
["layout.legacy_layout", "layout_legacy_layout"],
["layout.flexbox.enabled", "layout_flexbox_enabled"],
["layout.columns.enabled", "layout_columns_enabled"],
["layout.grid.enabled", "layout_grid_enabled"],
["layout.css.transition-behavior.enabled", "layout_css_transition_behavior_enabled"],
["layout.writing-mode.enabled", "layout_writing_mode_enabled"],
["layout.container-queries.enabled", "layout_container_queries_enabled"],
]
for mapping in MAPPING:
if mapping[0] == preference_name:
return mapping[1]
return preference_name
css_properties = json.load(open(css_properties_json, "rb"))
idl = "partial interface CSSStyleDeclaration {\n%s\n};\n" % "\n".join(
" [%sCEReactions, SetterThrows] attribute [LegacyNullToEmptyString] DOMString %s;" % (
(f'Pref="{map_preference_name(data["pref"])}", ' if data["pref"] else ""),
attribute_name
)
for (kind, properties_list) in sorted(css_properties.items())
for (property_name, data) in sorted(properties_list.items())
for attribute_name in attribute_names(property_name)
)
parser.parse(idl, "CSSStyleDeclaration_generated.webidl")
def attribute_names(property_name):
# https://drafts.csswg.org/cssom/#dom-cssstyledeclaration-dashed-attribute
if property_name != "float":
yield property_name
else:
yield "_float"
# https://drafts.csswg.org/cssom/#dom-cssstyledeclaration-camel-cased-attribute
if "-" in property_name:
yield "".join(camel_case(property_name))
# https://drafts.csswg.org/cssom/#dom-cssstyledeclaration-webkit-cased-attribute
if property_name.startswith("-webkit-"):
yield "".join(camel_case(property_name), True)
# https://drafts.csswg.org/cssom/#css-property-to-idl-attribute
def camel_case(chars, webkit_prefixed=False):
if webkit_prefixed:
chars = chars[1:]
next_is_uppercase = False
for c in chars:
if c == '-':
next_is_uppercase = True
elif next_is_uppercase:
next_is_uppercase = False
# Should be ASCII-uppercase, but all non-custom CSS property names are within ASCII
yield c.upper()
else:
yield c
if __name__ == "__main__":
main()
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