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Upgrade to SM 39
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a256f39796
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205 changed files with 6546 additions and 5340 deletions
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@ -29,14 +29,12 @@
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//!
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//! For more information, see:
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//!
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//! * rooting pointers on the stack: the [`Root`](bindings/js/struct.Root.html)
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//! and [`JSRef`](bindings/js/struct.JSRef.html) smart pointers;
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//! * rooting pointers on the stack:
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//! the [`Root`](bindings/js/struct.Root.html) smart pointer;
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//! * tracing pointers in member fields: the [`JS`](bindings/js/struct.JS.html),
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//! [`MutNullableJS`](bindings/js/struct.MutNullableJS.html) and
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//! [`MutHeap`](bindings/js/struct.MutHeap.html) smart pointers and
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//! [the tracing implementation](bindings/trace/index.html);
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//! * returning pointers from functions: the
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//! [`Temporary`](bindings/js/struct.Temporary.html) smart pointer;
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//! * rooting pointers from across task boundaries or in channels: the
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//! [`Trusted`](bindings/refcounted/struct.Trusted.html) smart pointer;
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//! * extracting pointers to DOM objects from their reflectors: the
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@ -62,7 +60,7 @@
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//! DOM objects of type `T` in Servo have two constructors:
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//!
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//! * a `T::new_inherited` static method that returns a plain `T`, and
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//! * a `T::new` static method that returns `Temporary<T>`.
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//! * a `T::new` static method that returns `Root<T>`.
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//!
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//! (The result of either method can be wrapped in `Result`, if that is
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//! appropriate for the type in question.)
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@ -111,6 +109,7 @@
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//! Implementing methods for a DOM object
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//! =====================================
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//!
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//! XXX JSRef no longer exists - should we remove the *Helpers traits?
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//! In order to ensure that DOM objects are rooted when they are called, we
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//! require that all methods are implemented for `JSRef<'a, Foo>`. This means
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//! that all methods are defined on traits. Conventionally, those traits are
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@ -121,24 +120,12 @@
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//! * `FooHelpers` for public methods;
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//! * `PrivateFooHelpers` for private methods.
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//!
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//! Calling methods on a DOM object
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//! ===============================
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//!
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//! To call a method on a DOM object, we require that the object is rooted, by
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//! calling `.root()` on a `Temporary` or `JS` pointer. This constructs a
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//! `Root` on the stack, which ensures the DOM object stays alive for the
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//! duration of its lifetime. A `JSRef` on which to call the method can then be
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//! obtained by calling the `r()` method on the `Root`.
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//!
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//! Accessing fields of a DOM object
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//! ================================
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//!
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//! All fields of DOM objects are private; accessing them from outside their
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//! module is done through explicit getter or setter methods.
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//!
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//! However, `JSRef<T>` dereferences to `&T`, so fields can be accessed on a
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//! `JSRef<T>` directly within the module that defines the struct.
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//!
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//! Inheritance and casting
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//! =======================
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//!
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@ -147,14 +134,13 @@
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//! to other types in the inheritance chain. For example:
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//!
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//! ```ignore
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//! # use script::dom::bindings::js::JSRef;
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//! # use script::dom::bindings::codegen::InheritTypes::{NodeCast, HTMLElementCast};
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//! # use script::dom::element::Element;
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//! # use script::dom::node::Node;
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//! # use script::dom::htmlelement::HTMLElement;
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//! fn f(element: JSRef<Element>) {
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//! let base: JSRef<Node> = NodeCast::from_ref(element);
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//! let derived: Option<JSRef<HTMLElement>> = HTMLElementCast::to_ref(element);
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//! fn f(element: &Element) {
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//! let base: &Node = NodeCast::from_ref(element);
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//! let derived: Option<&HTMLElement> = HTMLElementCast::to_ref(element);
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//! }
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//! ```
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//!
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//! superclass or `Reflector` member, and other members as appropriate;
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//! * implementing the
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//! `dom::bindings::codegen::Bindings::FooBindings::FooMethods` trait for
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//! `JSRef<Foo>`.
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//! `&'a Foo`.
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//!
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//! More information is available in the [bindings module](bindings/index.html).
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//!
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