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//
// DO NOT EDIT.  THIS FILE IS GENERATED FROM ../../../dist/idl/nsIDOMCanvasRenderingContext2D.idl
//


/// `interface nsIDOMCanvasRenderingContext2D : nsISupports`
///

/// ```text
/// /**
///  * This interface remains only for the constants, for a context, use the
///  * WebIDL/Paris bindings instead (CanvasRenderingContext2D.webidl).
///  * The constants are used by CanvasRenderingContext2D::DrawWindow and are
///  * used in WindowsPreviewPerTab.jsm and some extensions. The constants can
///  * be referenced directly via a canvas context 2d rather than this interface,
///  * and that should be preferred in new code.
///  */
/// ```
///

// The actual type definition for the interface. This struct has methods
// declared on it which will call through its vtable. You never want to pass
// this type around by value, always pass it behind a reference.

#[repr(C)]
pub struct nsIDOMCanvasRenderingContext2D {
    vtable: *const nsIDOMCanvasRenderingContext2DVTable,

    /// This field is a phantomdata to ensure that the VTable type and any
    /// struct containing it is not safe to send across threads, as XPCOM is
    /// generally not threadsafe.
    ///
    /// XPCOM interfaces in general are not safe to send across threads.
    __nosync: ::std::marker::PhantomData<::std::rc::Rc<u8>>,
}

// Implementing XpCom for an interface exposes its IID, which allows for easy
// use of the `.query_interface<T>` helper method. This also defines that
// method for nsIDOMCanvasRenderingContext2D.
unsafe impl XpCom for nsIDOMCanvasRenderingContext2D {
    const IID: nsIID = nsID(0x4417cab7, 0xc7eb, 0x4e0c,
        [0xb0, 0x0a, 0xc4, 0x38, 0x42, 0xf0, 0xcb, 0xa8]);
}

// We need to implement the RefCounted trait so we can be used with `RefPtr`.
// This trait teaches `RefPtr` how to manage our memory.
unsafe impl RefCounted for nsIDOMCanvasRenderingContext2D {
    #[inline]
    unsafe fn addref(&self) {
        self.AddRef();
    }
    #[inline]
    unsafe fn release(&self) {
        self.Release();
    }
}

// This trait is implemented on all types which can be coerced to from nsIDOMCanvasRenderingContext2D.
// It is used in the implementation of `fn coerce<T>`. We hide it from the
// documentation, because it clutters it up a lot.
#[doc(hidden)]
pub trait nsIDOMCanvasRenderingContext2DCoerce {
    /// Cheaply cast a value of this type from a `nsIDOMCanvasRenderingContext2D`.
    fn coerce_from(v: &nsIDOMCanvasRenderingContext2D) -> &Self;
}

// The trivial implementation: We can obviously coerce ourselves to ourselves.
impl nsIDOMCanvasRenderingContext2DCoerce for nsIDOMCanvasRenderingContext2D {
    #[inline]
    fn coerce_from(v: &nsIDOMCanvasRenderingContext2D) -> &Self {
        v
    }
}

impl nsIDOMCanvasRenderingContext2D {
    /// Cast this `nsIDOMCanvasRenderingContext2D` to one of its base interfaces.
    #[inline]
    pub fn coerce<T: nsIDOMCanvasRenderingContext2DCoerce>(&self) -> &T {
        T::coerce_from(self)
    }
}

// Every interface struct type implements `Deref` to its base interface. This
// causes methods on the base interfaces to be directly avaliable on the
// object. For example, you can call `.AddRef` or `.QueryInterface` directly
// on any interface which inherits from `nsISupports`.
impl ::std::ops::Deref for nsIDOMCanvasRenderingContext2D {
    type Target = nsISupports;
    #[inline]
    fn deref(&self) -> &nsISupports {
        unsafe {
            ::std::mem::transmute(self)
        }
    }
}

// Ensure we can use .coerce() to cast to our base types as well. Any type which
// our base interface can coerce from should be coercable from us as well.
impl<T: nsISupportsCoerce> nsIDOMCanvasRenderingContext2DCoerce for T {
    #[inline]
    fn coerce_from(v: &nsIDOMCanvasRenderingContext2D) -> &Self {
        T::coerce_from(v)
    }
}

// This struct represents the interface's VTable. A pointer to a statically
// allocated version of this struct is at the beginning of every nsIDOMCanvasRenderingContext2D
// object. It contains one pointer field for each method in the interface. In
// the case where we can't generate a binding for a method, we include a void
// pointer.
#[doc(hidden)]
#[repr(C)]
pub struct nsIDOMCanvasRenderingContext2DVTable {
    /// We need to include the members from the base interface's vtable at the start
    /// of the VTable definition.
    pub __base: nsISupportsVTable,

}


// The implementations of the function wrappers which are exposed to rust code.
// Call these methods rather than manually calling through the VTable struct.
impl nsIDOMCanvasRenderingContext2D {

    pub const DRAWWINDOW_DRAW_CARET: i64 = 1;


    pub const DRAWWINDOW_DO_NOT_FLUSH: i64 = 2;


    pub const DRAWWINDOW_DRAW_VIEW: i64 = 4;


    pub const DRAWWINDOW_USE_WIDGET_LAYERS: i64 = 8;


    pub const DRAWWINDOW_ASYNC_DECODE_IMAGES: i64 = 16;


}