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Rewrite the codegen for nullable primitives to use JSValConvertible.

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This commit is contained in:
Ms2ger 2014-03-04 18:55:58 +01:00
parent aa9a61a78c
commit 1608f842e9
2 changed files with 34 additions and 22 deletions
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35
src/components/script/dom/bindings/codegen/CodegenRust.py
View file

@ -1233,23 +1233,24 @@ for (uint32_t i = 0; i < length; ++i) {
failureCode = 'return 0'
if type.nullable():
dataLoc = "${declName}.SetValue()"
nullCondition = "(RUST_JSVAL_IS_NULL(${val}) != 0 || RUST_JSVAL_IS_VOID(${val}) != 0)"
if defaultValue is not None and isinstance(defaultValue, IDLNullValue):
nullCondition = "!(${haveValue}) || " + nullCondition
successVal = "val_"
successVal = "v"
if preSuccess or postSuccess:
successVal = preSuccess + successVal + postSuccess
#XXXjdm support conversionBehavior here
template = (
"if (%s) {\n"
" ${declName} = None;\n"
"} else {\n"
" match JSValConvertible::from_jsval(cx, ${val}) {\n"
" Some(val_) => ${declName} = Some(%s),\n"
" None => %s\n"
" }\n"
"}" % (nullCondition, successVal, failureCode))
"match JSValConvertible::from_jsval(cx, ${val}) {\n"
" Some(v) => ${declName} = %s,\n"
" None => %s\n"
"}" % (successVal, failureCode))
if defaultValue is not None and isinstance(defaultValue, IDLNullValue):
template = CGWrapper(CGIndenter(CGGeneric(template)),
pre="if ${haveValue} {\n",
post=("\n"
"} else {\n"
" ${declName} = None;\n"
"}")).define()
declType = CGGeneric("Option<" + typeName + ">")
else:
assert(defaultValue is None or
@ -1599,14 +1600,6 @@ if %(resultStr)s.is_null() {
if not type.isPrimitive():
raise TypeError("Need to learn to wrap %s" % type)
if type.nullable():
(recTemplate, recInfal) = getWrapTemplateForType(type.inner, descriptorProvider,
"%s.unwrap()" % result, successCode,
isCreator, exceptionCode)
return ("if (%s.is_none()) {\n" % result +
CGIndenter(CGGeneric(setValue("JSVAL_NULL"))).define() + "\n" +
"}\n" + recTemplate, recInfal)
return (setValue("(%s).to_jsval()" % result), True)

21
src/components/script/dom/bindings/conversions.rs
View file

@ -6,8 +6,9 @@ use js::jsapi::{JSVal, JSBool, JSContext};
use js::jsapi::{JS_ValueToUint64, JS_ValueToInt64};
use js::jsapi::{JS_ValueToECMAUint32, JS_ValueToECMAInt32};
use js::jsapi::{JS_ValueToUint16, JS_ValueToNumber, JS_ValueToBoolean};
use js::{JSVAL_FALSE, JSVAL_TRUE};
use js::{JSVAL_FALSE, JSVAL_TRUE, JSVAL_NULL};
use js::glue::{RUST_INT_TO_JSVAL, RUST_UINT_TO_JSVAL, RUST_JS_NumberValue};
use js::glue::{RUST_JSVAL_IS_NULL, RUST_JSVAL_IS_VOID};
pub trait JSValConvertible {
fn to_jsval(&self) -> JSVal;
@ -165,3 +166,21 @@ impl JSValConvertible for f64 {
unsafe { convert_from_jsval(cx, val, JS_ValueToNumber) }
}
}
impl<T: JSValConvertible> JSValConvertible for Option<T> {
fn to_jsval(&self) -> JSVal {
match self {
&Some(ref value) => value.to_jsval(),
&None => JSVAL_NULL,
}
}
fn from_jsval(cx: *JSContext, value: JSVal) -> Option<Option<T>> {
if unsafe { RUST_JSVAL_IS_NULL(value) != 0 || RUST_JSVAL_IS_VOID(value) != 0 } {
Some(None)
} else {
let result: Option<T> = JSValConvertible::from_jsval(cx, value);
result.map(|v| Some(v))
}
}
}