mirror of
https://github.com/servo/servo.git
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794 lines
26 KiB
Rust
794 lines
26 KiB
Rust
/* 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 http://mozilla.org/MPL/2.0/. */
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//! Various utilities to glue JavaScript and the DOM implementation together.
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use dom::bindings::codegen::PrototypeList;
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use dom::bindings::codegen::PrototypeList::MAX_PROTO_CHAIN_LENGTH;
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use dom::bindings::conversions::{FromJSValConvertible, IDLInterface};
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use dom::bindings::error::throw_type_error;
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use dom::bindings::global::{GlobalRef, GlobalField, WindowField, WorkerField};
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use dom::bindings::js::{JS, Temporary, Root};
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use dom::bindings::trace::Untraceable;
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use dom::browsercontext;
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use dom::window;
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use servo_util::str::DOMString;
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use libc;
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use libc::c_uint;
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use std::cell::Cell;
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use std::mem;
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use std::cmp::PartialEq;
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use std::ptr;
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use std::slice;
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use js::glue::{js_IsObjectProxyClass, js_IsFunctionProxyClass, IsProxyHandlerFamily};
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use js::glue::{GetGlobalForObjectCrossCompartment, UnwrapObject, GetProxyHandlerExtra};
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use js::glue::{IsWrapper, RUST_JSID_TO_STRING, RUST_JSID_IS_INT};
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use js::glue::{RUST_JSID_IS_STRING, RUST_JSID_TO_INT};
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use js::jsapi::{JS_AlreadyHasOwnProperty, JS_NewFunction};
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use js::jsapi::{JS_DefineProperties, JS_ForwardGetPropertyTo};
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use js::jsapi::{JS_GetClass, JS_LinkConstructorAndPrototype, JS_GetStringCharsAndLength};
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use js::jsapi::{JS_ObjectIsRegExp, JS_ObjectIsDate, JSHandleObject};
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use js::jsapi::JS_GetFunctionObject;
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use js::jsapi::{JS_HasPropertyById, JS_GetPrototype};
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use js::jsapi::{JS_GetProperty, JS_HasProperty};
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use js::jsapi::{JS_DefineFunctions, JS_DefineProperty};
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use js::jsapi::{JS_ValueToString, JS_GetReservedSlot, JS_SetReservedSlot};
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use js::jsapi::{JSContext, JSObject, JSBool, jsid, JSClass};
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use js::jsapi::{JSFunctionSpec, JSPropertySpec};
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use js::jsapi::{JS_NewGlobalObject, JS_InitStandardClasses};
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use js::jsapi::{JSString};
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use js::jsapi::JS_DeletePropertyById2;
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use js::jsfriendapi::JS_ObjectToOuterObject;
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use js::jsfriendapi::bindgen::JS_NewObjectWithUniqueType;
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use js::jsval::JSVal;
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use js::jsval::{PrivateValue, ObjectValue, NullValue, ObjectOrNullValue};
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use js::jsval::{Int32Value, UInt32Value, DoubleValue, BooleanValue, UndefinedValue};
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use js::rust::with_compartment;
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use js::{JSPROP_ENUMERATE, JSCLASS_IS_GLOBAL, JSCLASS_IS_DOMJSCLASS};
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use js::JSPROP_PERMANENT;
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use js::{JSFUN_CONSTRUCTOR, JSPROP_READONLY};
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use js;
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#[allow(raw_pointer_deriving)]
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#[deriving(Encodable)]
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pub struct GlobalStaticData {
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pub windowproxy_handler: Untraceable<*const libc::c_void>,
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}
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pub fn GlobalStaticData() -> GlobalStaticData {
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GlobalStaticData {
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windowproxy_handler: Untraceable::new(browsercontext::new_window_proxy_handler()),
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}
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}
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/// Returns whether the given `clasp` is one for a DOM object.
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fn is_dom_class(clasp: *const JSClass) -> bool {
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unsafe {
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((*clasp).flags & js::JSCLASS_IS_DOMJSCLASS) != 0
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}
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}
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/// Returns whether `obj` is a DOM object implemented as a proxy.
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pub fn is_dom_proxy(obj: *mut JSObject) -> bool {
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unsafe {
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(js_IsObjectProxyClass(obj) || js_IsFunctionProxyClass(obj)) &&
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IsProxyHandlerFamily(obj)
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}
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}
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/// Returns the index of the slot wherein a pointer to the reflected DOM object
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/// is stored.
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///
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/// Fails if `obj` is not a DOM object.
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pub unsafe fn dom_object_slot(obj: *mut JSObject) -> u32 {
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let clasp = JS_GetClass(obj);
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if is_dom_class(&*clasp) {
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DOM_OBJECT_SLOT as u32
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} else {
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assert!(is_dom_proxy(obj));
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DOM_PROXY_OBJECT_SLOT as u32
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}
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}
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/// Get the DOM object from the given reflector.
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pub unsafe fn unwrap<T>(obj: *mut JSObject) -> *const T {
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let slot = dom_object_slot(obj);
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let val = JS_GetReservedSlot(obj, slot);
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val.to_private() as *const T
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}
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/// Get the `DOMClass` from `obj`, or `Err(())` if `obj` is not a DOM object.
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pub unsafe fn get_dom_class(obj: *mut JSObject) -> Result<DOMClass, ()> {
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let clasp = JS_GetClass(obj);
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if is_dom_class(&*clasp) {
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debug!("plain old dom object");
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let domjsclass: *const DOMJSClass = clasp as *const DOMJSClass;
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return Ok((*domjsclass).dom_class);
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}
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if is_dom_proxy(obj) {
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debug!("proxy dom object");
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let dom_class: *const DOMClass = GetProxyHandlerExtra(obj) as *const DOMClass;
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return Ok(*dom_class);
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}
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debug!("not a dom object");
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return Err(());
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}
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/// Get a `JS<T>` for the given DOM object, unwrapping any wrapper around it
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/// first, and checking if the object is of the correct type.
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///
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/// Returns Err(()) if `obj` is an opaque security wrapper or if the object is
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/// not a reflector for a DOM object of the given type (as defined by the
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/// proto_id and proto_depth).
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pub fn unwrap_jsmanaged<T: Reflectable>(mut obj: *mut JSObject,
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proto_id: PrototypeList::id::ID,
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proto_depth: uint) -> Result<JS<T>, ()> {
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unsafe {
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let dom_class = get_dom_class(obj).or_else(|_| {
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if IsWrapper(obj) == 1 {
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debug!("found wrapper");
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obj = UnwrapObject(obj, /* stopAtOuter = */ 0, ptr::mut_null());
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if obj.is_null() {
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debug!("unwrapping security wrapper failed");
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Err(())
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} else {
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assert!(IsWrapper(obj) == 0);
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debug!("unwrapped successfully");
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get_dom_class(obj)
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}
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} else {
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debug!("not a dom wrapper");
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Err(())
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}
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});
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dom_class.and_then(|dom_class| {
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if dom_class.interface_chain[proto_depth] == proto_id {
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debug!("good prototype");
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Ok(JS::from_raw(unwrap(obj)))
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} else {
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debug!("bad prototype");
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Err(())
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}
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})
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}
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}
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/// Leak the given pointer.
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pub unsafe fn squirrel_away_unique<T>(x: Box<T>) -> *const T {
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mem::transmute(x)
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}
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/// Convert the given `JSString` to a `DOMString`. Fails if the string does not
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/// contain valid UTF-16.
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pub fn jsstring_to_str(cx: *mut JSContext, s: *mut JSString) -> DOMString {
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unsafe {
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let mut length = 0;
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let chars = JS_GetStringCharsAndLength(cx, s, &mut length);
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slice::raw::buf_as_slice(chars, length as uint, |char_vec| {
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String::from_utf16(char_vec).unwrap()
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})
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}
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}
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/// Convert the given `jsid` to a `DOMString`. Fails if the `jsid` is not a
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/// string, or if the string does not contain valid UTF-16.
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pub fn jsid_to_str(cx: *mut JSContext, id: jsid) -> DOMString {
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unsafe {
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assert!(RUST_JSID_IS_STRING(id) != 0);
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jsstring_to_str(cx, RUST_JSID_TO_STRING(id))
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}
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}
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/// The index of the slot wherein a pointer to the reflected DOM object is
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/// stored for non-proxy bindings.
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// We use slot 0 for holding the raw object. This is safe for both
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// globals and non-globals.
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pub static DOM_OBJECT_SLOT: uint = 0;
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static DOM_PROXY_OBJECT_SLOT: uint = js::JSSLOT_PROXY_PRIVATE as uint;
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// NOTE: This is baked into the Ion JIT as 0 in codegen for LGetDOMProperty and
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// LSetDOMProperty. Those constants need to be changed accordingly if this value
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// changes.
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static DOM_PROTO_INSTANCE_CLASS_SLOT: u32 = 0;
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/// The index of the slot that contains a reference to the ProtoOrIfaceArray.
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// All DOM globals must have a slot at DOM_PROTOTYPE_SLOT.
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pub static DOM_PROTOTYPE_SLOT: u32 = js::JSCLASS_GLOBAL_SLOT_COUNT;
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/// The flag set on the `JSClass`es for DOM global objects.
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// NOTE: This is baked into the Ion JIT as 0 in codegen for LGetDOMProperty and
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// LSetDOMProperty. Those constants need to be changed accordingly if this value
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// changes.
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pub static JSCLASS_DOM_GLOBAL: u32 = js::JSCLASS_USERBIT1;
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/// Representation of an IDL constant value.
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#[deriving(Clone)]
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pub enum ConstantVal {
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IntVal(i32),
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UintVal(u32),
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DoubleVal(f64),
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BoolVal(bool),
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NullVal,
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VoidVal
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}
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/// Representation of an IDL constant.
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#[deriving(Clone)]
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pub struct ConstantSpec {
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pub name: &'static [u8],
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pub value: ConstantVal
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}
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impl ConstantSpec {
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/// Returns a `JSVal` that represents the value of this `ConstantSpec`.
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pub fn get_value(&self) -> JSVal {
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match self.value {
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NullVal => NullValue(),
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IntVal(i) => Int32Value(i),
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UintVal(u) => UInt32Value(u),
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DoubleVal(d) => DoubleValue(d),
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BoolVal(b) => BooleanValue(b),
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VoidVal => UndefinedValue(),
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}
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}
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}
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/// Helper structure for cross-origin wrappers for DOM binding objects.
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pub struct NativePropertyHooks {
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/// The property arrays for this interface.
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pub native_properties: &'static NativeProperties,
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/// The NativePropertyHooks instance for the parent interface, if any.
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pub proto_hooks: Option<&'static NativePropertyHooks>,
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}
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/// The struct that holds inheritance information for DOM object reflectors.
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pub struct DOMClass {
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/// A list of interfaces that this object implements, in order of decreasing
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/// derivedness.
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pub interface_chain: [PrototypeList::id::ID, ..MAX_PROTO_CHAIN_LENGTH],
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/// The NativePropertyHooks for the interface associated with this class.
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pub native_hooks: &'static NativePropertyHooks,
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}
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/// The JSClass used for DOM object reflectors.
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pub struct DOMJSClass {
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pub base: js::Class,
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pub dom_class: DOMClass
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}
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/// Returns the ProtoOrIfaceArray for the given global object.
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/// Fails if `global` is not a DOM global object.
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pub fn GetProtoOrIfaceArray(global: *mut JSObject) -> *mut *mut JSObject {
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unsafe {
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assert!(((*JS_GetClass(global)).flags & JSCLASS_DOM_GLOBAL) != 0);
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JS_GetReservedSlot(global, DOM_PROTOTYPE_SLOT).to_private() as *mut *mut JSObject
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}
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}
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/// Contains references to lists of methods, attributes, and constants for a
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/// given interface.
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pub struct NativeProperties {
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pub methods: Option<&'static [JSFunctionSpec]>,
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pub attrs: Option<&'static [JSPropertySpec]>,
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pub consts: Option<&'static [ConstantSpec]>,
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pub staticMethods: Option<&'static [JSFunctionSpec]>,
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pub staticAttrs: Option<&'static [JSPropertySpec]>,
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}
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/// A JSNative that cannot be null.
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pub type NonNullJSNative =
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unsafe extern "C" fn (arg1: *mut JSContext, arg2: c_uint, arg3: *mut JSVal) -> JSBool;
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/// Creates the *interface prototype object* and the *interface object* (if
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/// needed).
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/// Fails on JSAPI failure.
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pub fn CreateInterfaceObjects2(cx: *mut JSContext, global: *mut JSObject, receiver: *mut JSObject,
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protoProto: *mut JSObject,
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protoClass: &'static JSClass,
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constructor: Option<(NonNullJSNative, &'static str, u32)>,
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domClass: *const DOMClass,
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members: &'static NativeProperties) -> *mut JSObject {
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let proto = CreateInterfacePrototypeObject(cx, global, protoProto,
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protoClass, members);
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unsafe {
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JS_SetReservedSlot(proto, DOM_PROTO_INSTANCE_CLASS_SLOT,
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PrivateValue(domClass as *const libc::c_void));
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}
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match constructor {
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Some((native, name, nargs)) => {
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let s = name.to_c_str();
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CreateInterfaceObject(cx, global, receiver,
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native, nargs, proto,
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members, s.as_ptr())
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},
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None => (),
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}
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proto
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}
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/// Creates the *interface object*.
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/// Fails on JSAPI failure.
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fn CreateInterfaceObject(cx: *mut JSContext, global: *mut JSObject, receiver: *mut JSObject,
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constructorNative: NonNullJSNative,
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ctorNargs: u32, proto: *mut JSObject,
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members: &'static NativeProperties,
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name: *const libc::c_char) {
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unsafe {
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let fun = JS_NewFunction(cx, Some(constructorNative), ctorNargs,
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JSFUN_CONSTRUCTOR, global, name);
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assert!(fun.is_not_null());
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let constructor = JS_GetFunctionObject(fun);
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assert!(constructor.is_not_null());
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match members.staticMethods {
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Some(staticMethods) => DefineMethods(cx, constructor, staticMethods),
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_ => (),
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}
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match members.staticAttrs {
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Some(staticProperties) => DefineProperties(cx, constructor, staticProperties),
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_ => (),
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}
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match members.consts {
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Some(constants) => DefineConstants(cx, constructor, constants),
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_ => (),
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}
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if proto.is_not_null() {
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assert!(JS_LinkConstructorAndPrototype(cx, constructor, proto) != 0);
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}
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let mut alreadyDefined = 0;
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assert!(JS_AlreadyHasOwnProperty(cx, receiver, name, &mut alreadyDefined) != 0);
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if alreadyDefined == 0 {
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assert!(JS_DefineProperty(cx, receiver, name,
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ObjectValue(&*constructor),
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None, None, 0) != 0);
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}
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}
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}
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/// Defines constants on `obj`.
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/// Fails on JSAPI failure.
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fn DefineConstants(cx: *mut JSContext, obj: *mut JSObject, constants: &'static [ConstantSpec]) {
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for spec in constants.iter() {
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unsafe {
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assert!(JS_DefineProperty(cx, obj, spec.name.as_ptr() as *const libc::c_char,
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spec.get_value(), None, None,
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JSPROP_ENUMERATE | JSPROP_READONLY |
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JSPROP_PERMANENT) != 0);
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}
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}
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}
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/// Defines methods on `obj`. The last entry of `methods` must contain zeroed
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/// memory.
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/// Fails on JSAPI failure.
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fn DefineMethods(cx: *mut JSContext, obj: *mut JSObject, methods: &'static [JSFunctionSpec]) {
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unsafe {
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assert!(JS_DefineFunctions(cx, obj, methods.as_ptr()) != 0);
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}
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}
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/// Defines attributes on `obj`. The last entry of `properties` must contain
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/// zeroed memory.
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/// Fails on JSAPI failure.
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fn DefineProperties(cx: *mut JSContext, obj: *mut JSObject, properties: &'static [JSPropertySpec]) {
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unsafe {
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assert!(JS_DefineProperties(cx, obj, properties.as_ptr()) != 0);
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}
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}
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/// Creates the *interface prototype object*.
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/// Fails on JSAPI failure.
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fn CreateInterfacePrototypeObject(cx: *mut JSContext, global: *mut JSObject,
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parentProto: *mut JSObject,
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protoClass: &'static JSClass,
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members: &'static NativeProperties) -> *mut JSObject {
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unsafe {
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let ourProto = JS_NewObjectWithUniqueType(cx, protoClass, &*parentProto, &*global);
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assert!(ourProto.is_not_null());
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match members.methods {
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Some(methods) => DefineMethods(cx, ourProto, methods),
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_ => (),
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}
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match members.attrs {
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Some(properties) => DefineProperties(cx, ourProto, properties),
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_ => (),
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}
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match members.consts {
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Some(constants) => DefineConstants(cx, ourProto, constants),
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_ => (),
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}
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return ourProto;
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}
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}
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/// A throwing constructor, for those interfaces that have neither
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/// `NoInterfaceObject` nor `Constructor`.
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pub extern fn ThrowingConstructor(cx: *mut JSContext, _argc: c_uint, _vp: *mut JSVal) -> JSBool {
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throw_type_error(cx, "Illegal constructor.");
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return 0;
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}
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/// Construct and cache the ProtoOrIfaceArray for the given global.
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/// Fails if the argument is not a DOM global.
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pub fn initialize_global(global: *mut JSObject) {
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let protoArray = box () ([0 as *mut JSObject, ..PrototypeList::id::IDCount as uint]);
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unsafe {
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assert!(((*JS_GetClass(global)).flags & JSCLASS_DOM_GLOBAL) != 0);
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let box_ = squirrel_away_unique(protoArray);
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JS_SetReservedSlot(global,
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DOM_PROTOTYPE_SLOT,
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PrivateValue(box_ as *const libc::c_void));
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}
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}
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/// A trait to provide access to the `Reflector` for a DOM object.
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pub trait Reflectable {
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fn reflector<'a>(&'a self) -> &'a Reflector;
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}
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/// Create the reflector for a new DOM object and yield ownership to the
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/// reflector.
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pub fn reflect_dom_object<T: Reflectable>
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(obj: Box<T>,
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global: &GlobalRef,
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wrap_fn: extern "Rust" fn(*mut JSContext, &GlobalRef, Box<T>) -> Temporary<T>)
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-> Temporary<T> {
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wrap_fn(global.get_cx(), global, obj)
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}
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/// A struct to store a reference to the reflector of a DOM object.
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#[allow(raw_pointer_deriving, unrooted_must_root)]
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#[deriving(PartialEq)]
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#[must_root]
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pub struct Reflector {
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object: Cell<*mut JSObject>,
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}
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impl Reflector {
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/// Get the reflector.
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#[inline]
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pub fn get_jsobject(&self) -> *mut JSObject {
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self.object.get()
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}
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/// Initialize the reflector. (May be called only once.)
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pub fn set_jsobject(&self, object: *mut JSObject) {
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assert!(self.object.get().is_null());
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assert!(object.is_not_null());
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self.object.set(object);
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}
|
|
|
|
/// Return a pointer to the memory location at which the JS reflector object is stored.
|
|
/// Used by Temporary values to root the reflector, as required by the JSAPI rooting
|
|
/// APIs.
|
|
pub fn rootable(&self) -> *mut *mut JSObject {
|
|
&self.object as *const Cell<*mut JSObject>
|
|
as *mut Cell<*mut JSObject>
|
|
as *mut *mut JSObject
|
|
}
|
|
|
|
/// Create an uninitialized `Reflector`.
|
|
pub fn new() -> Reflector {
|
|
Reflector {
|
|
object: Cell::new(ptr::mut_null()),
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn GetPropertyOnPrototype(cx: *mut JSContext, proxy: *mut JSObject, id: jsid, found: *mut bool,
|
|
vp: *mut JSVal) -> bool {
|
|
unsafe {
|
|
//let proto = GetObjectProto(proxy);
|
|
let proto = JS_GetPrototype(proxy);
|
|
if proto.is_null() {
|
|
*found = false;
|
|
return true;
|
|
}
|
|
let mut hasProp = 0;
|
|
if JS_HasPropertyById(cx, proto, id, &mut hasProp) == 0 {
|
|
return false;
|
|
}
|
|
*found = hasProp != 0;
|
|
let no_output = vp.is_null();
|
|
if hasProp == 0 || no_output {
|
|
return true;
|
|
}
|
|
|
|
JS_ForwardGetPropertyTo(cx, proto, id, proxy, vp) != 0
|
|
}
|
|
}
|
|
|
|
/// Get an array index from the given `jsid`. Returns `None` if the given
|
|
/// `jsid` is not an integer.
|
|
pub fn GetArrayIndexFromId(_cx: *mut JSContext, id: jsid) -> Option<u32> {
|
|
unsafe {
|
|
if RUST_JSID_IS_INT(id) != 0 {
|
|
return Some(RUST_JSID_TO_INT(id) as u32);
|
|
}
|
|
return None;
|
|
}
|
|
// if id is length atom, -1, otherwise
|
|
/*return if JSID_IS_ATOM(id) {
|
|
let atom = JSID_TO_ATOM(id);
|
|
//let s = *GetAtomChars(id);
|
|
if s > 'a' && s < 'z' {
|
|
return -1;
|
|
}
|
|
|
|
let i = 0;
|
|
let str = AtomToLinearString(JSID_TO_ATOM(id));
|
|
return if StringIsArray(str, &mut i) != 0 { i } else { -1 }
|
|
} else {
|
|
IdToInt32(cx, id);
|
|
}*/
|
|
}
|
|
|
|
/// Find the index of a string given by `v` in `values`.
|
|
/// Returns `Err(())` on JSAPI failure (there is a pending exception), and
|
|
/// `Ok(None)` if there was no matching string.
|
|
pub fn FindEnumStringIndex(cx: *mut JSContext,
|
|
v: JSVal,
|
|
values: &[&'static str]) -> Result<Option<uint>, ()> {
|
|
unsafe {
|
|
let jsstr = JS_ValueToString(cx, v);
|
|
if jsstr.is_null() {
|
|
return Err(());
|
|
}
|
|
|
|
let mut length = 0;
|
|
let chars = JS_GetStringCharsAndLength(cx, jsstr, &mut length);
|
|
if chars.is_null() {
|
|
return Err(());
|
|
}
|
|
|
|
Ok(values.iter().position(|value| {
|
|
value.len() == length as uint &&
|
|
range(0, length as uint).all(|j| {
|
|
value.as_bytes()[j] as u16 == *chars.offset(j as int)
|
|
})
|
|
}))
|
|
}
|
|
}
|
|
|
|
/// Get the property with name `property` from `object`.
|
|
/// Returns `Err(())` on JSAPI failure (there is a pending exception), and
|
|
/// `Ok(None)` if there was no property with the given name.
|
|
pub fn get_dictionary_property(cx: *mut JSContext,
|
|
object: *mut JSObject,
|
|
property: &str) -> Result<Option<JSVal>, ()> {
|
|
use std::c_str::CString;
|
|
fn has_property(cx: *mut JSContext, object: *mut JSObject, property: &CString,
|
|
found: &mut JSBool) -> bool {
|
|
unsafe {
|
|
JS_HasProperty(cx, object, property.as_ptr(), found) != 0
|
|
}
|
|
}
|
|
fn get_property(cx: *mut JSContext, object: *mut JSObject, property: &CString,
|
|
value: &mut JSVal) -> bool {
|
|
unsafe {
|
|
JS_GetProperty(cx, object, property.as_ptr(), value) != 0
|
|
}
|
|
}
|
|
|
|
let property = property.to_c_str();
|
|
if object.is_null() {
|
|
return Ok(None);
|
|
}
|
|
|
|
let mut found: JSBool = 0;
|
|
if !has_property(cx, object, &property, &mut found) {
|
|
return Err(());
|
|
}
|
|
|
|
if found == 0 {
|
|
return Ok(None);
|
|
}
|
|
|
|
let mut value = NullValue();
|
|
if !get_property(cx, object, &property, &mut value) {
|
|
return Err(());
|
|
}
|
|
|
|
Ok(Some(value))
|
|
}
|
|
|
|
pub fn HasPropertyOnPrototype(cx: *mut JSContext, proxy: *mut JSObject, id: jsid) -> bool {
|
|
// MOZ_ASSERT(js::IsProxy(proxy) && js::GetProxyHandler(proxy) == handler);
|
|
let mut found = false;
|
|
return !GetPropertyOnPrototype(cx, proxy, id, &mut found, ptr::mut_null()) || found;
|
|
}
|
|
|
|
/// Returns whether `obj` can be converted to a callback interface per IDL.
|
|
pub fn IsConvertibleToCallbackInterface(cx: *mut JSContext, obj: *mut JSObject) -> bool {
|
|
unsafe {
|
|
JS_ObjectIsDate(cx, obj) == 0 && JS_ObjectIsRegExp(cx, obj) == 0
|
|
}
|
|
}
|
|
|
|
/// Create a DOM global object with the given class.
|
|
pub fn CreateDOMGlobal(cx: *mut JSContext, class: *const JSClass) -> *mut JSObject {
|
|
unsafe {
|
|
let obj = JS_NewGlobalObject(cx, class, ptr::mut_null());
|
|
if obj.is_null() {
|
|
return ptr::mut_null();
|
|
}
|
|
with_compartment(cx, obj, || {
|
|
JS_InitStandardClasses(cx, obj);
|
|
});
|
|
initialize_global(obj);
|
|
obj
|
|
}
|
|
}
|
|
|
|
/// Callback to outerize windows when wrapping.
|
|
pub extern fn wrap_for_same_compartment(cx: *mut JSContext, obj: *mut JSObject) -> *mut JSObject {
|
|
unsafe {
|
|
JS_ObjectToOuterObject(cx, obj)
|
|
}
|
|
}
|
|
|
|
/// Callback to outerize windows before wrapping.
|
|
pub extern fn pre_wrap(cx: *mut JSContext, _scope: *mut JSObject,
|
|
obj: *mut JSObject, _flags: c_uint) -> *mut JSObject {
|
|
unsafe {
|
|
JS_ObjectToOuterObject(cx, obj)
|
|
}
|
|
}
|
|
|
|
/// Callback to outerize windows.
|
|
pub extern fn outerize_global(_cx: *mut JSContext, obj: JSHandleObject) -> *mut JSObject {
|
|
unsafe {
|
|
debug!("outerizing");
|
|
let obj = *obj.unnamed_field1;
|
|
let win: Root<window::Window> =
|
|
unwrap_jsmanaged(obj,
|
|
IDLInterface::get_prototype_id(None::<window::Window>),
|
|
IDLInterface::get_prototype_depth(None::<window::Window>))
|
|
.unwrap()
|
|
.root();
|
|
win.deref().browser_context.deref().borrow().get_ref().window_proxy()
|
|
}
|
|
}
|
|
|
|
/// Returns the global object of the realm that the given JS object was created in.
|
|
#[allow(unrooted_must_root)]
|
|
pub fn global_object_for_js_object(obj: *mut JSObject) -> GlobalField {
|
|
unsafe {
|
|
let global = GetGlobalForObjectCrossCompartment(obj);
|
|
let clasp = JS_GetClass(global);
|
|
assert!(((*clasp).flags & (JSCLASS_IS_DOMJSCLASS | JSCLASS_IS_GLOBAL)) != 0);
|
|
match FromJSValConvertible::from_jsval(ptr::mut_null(), ObjectOrNullValue(global), ()) {
|
|
Ok(window) => return WindowField(window),
|
|
Err(_) => (),
|
|
}
|
|
|
|
match FromJSValConvertible::from_jsval(ptr::mut_null(), ObjectOrNullValue(global), ()) {
|
|
Ok(worker) => return WorkerField(worker),
|
|
Err(_) => (),
|
|
}
|
|
|
|
fail!("found DOM global that doesn't unwrap to Window or WorkerGlobalScope")
|
|
}
|
|
}
|
|
|
|
/// Get the `JSContext` for the `JSRuntime` associated with the thread
|
|
/// this object is on.
|
|
#[allow(unrooted_must_root)]
|
|
fn cx_for_dom_reflector(obj: *mut JSObject) -> *mut JSContext {
|
|
let global = global_object_for_js_object(obj);
|
|
let global = global.root();
|
|
global.root_ref().get_cx()
|
|
}
|
|
|
|
/// Get the `JSContext` for the `JSRuntime` associated with the thread
|
|
/// this DOM object is on.
|
|
pub fn cx_for_dom_object<T: Reflectable>(obj: &T) -> *mut JSContext {
|
|
cx_for_dom_reflector(obj.reflector().get_jsobject())
|
|
}
|
|
|
|
pub unsafe fn delete_property_by_id(cx: *mut JSContext, object: *mut JSObject,
|
|
id: jsid, bp: &mut bool) -> bool {
|
|
let mut value = UndefinedValue();
|
|
if JS_DeletePropertyById2(cx, object, id, &mut value) == 0 {
|
|
return false;
|
|
}
|
|
|
|
*bp = value.to_boolean();
|
|
return true;
|
|
}
|
|
|
|
/// Results of `xml_name_type`.
|
|
#[deriving(PartialEq)]
|
|
pub enum XMLName {
|
|
QName,
|
|
Name,
|
|
InvalidXMLName
|
|
}
|
|
|
|
/// Check if an element name is valid. See http://www.w3.org/TR/xml/#NT-Name
|
|
/// for details.
|
|
pub fn xml_name_type(name: &str) -> XMLName {
|
|
fn is_valid_start(c: char) -> bool {
|
|
match c {
|
|
':' |
|
|
'A' .. 'Z' |
|
|
'_' |
|
|
'a' .. 'z' |
|
|
'\xC0' .. '\xD6' |
|
|
'\xD8' .. '\xF6' |
|
|
'\xF8' .. '\u02FF' |
|
|
'\u0370' .. '\u037D' |
|
|
'\u037F' .. '\u1FFF' |
|
|
'\u200C' .. '\u200D' |
|
|
'\u2070' .. '\u218F' |
|
|
'\u2C00' .. '\u2FEF' |
|
|
'\u3001' .. '\uD7FF' |
|
|
'\uF900' .. '\uFDCF' |
|
|
'\uFDF0' .. '\uFFFD' |
|
|
'\U00010000' .. '\U000EFFFF' => true,
|
|
_ => false,
|
|
}
|
|
}
|
|
|
|
fn is_valid_continuation(c: char) -> bool {
|
|
is_valid_start(c) || match c {
|
|
'-' |
|
|
'.' |
|
|
'0' .. '9' |
|
|
'\xB7' |
|
|
'\u0300' .. '\u036F' |
|
|
'\u203F' .. '\u2040' => true,
|
|
_ => false,
|
|
}
|
|
}
|
|
|
|
let mut iter = name.chars();
|
|
let mut non_qname_colons = false;
|
|
let mut seen_colon = false;
|
|
match iter.next() {
|
|
None => return InvalidXMLName,
|
|
Some(c) => {
|
|
if !is_valid_start(c) {
|
|
return InvalidXMLName;
|
|
}
|
|
if c == ':' {
|
|
non_qname_colons = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
for c in name.chars() {
|
|
if !is_valid_continuation(c) {
|
|
return InvalidXMLName;
|
|
}
|
|
if c == ':' {
|
|
match seen_colon {
|
|
true => non_qname_colons = true,
|
|
false => seen_colon = true
|
|
}
|
|
}
|
|
}
|
|
|
|
match non_qname_colons {
|
|
false => QName,
|
|
true => Name
|
|
}
|
|
}
|