forked from mirrors/gecko-dev
14926dcf7c
<!-- Please describe your changes on the following line: --> Automatically verify that derive() lists are alphabetically ordered #18172 --- <!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: --> - [X] `./mach build -d` does not report any errors - [X] `./mach test-tidy` does not report any errors - [X] These changes fix #18172 (github issue number if applicable). <!-- Either: --> - [X] There are tests for these changes OR - [ ] These changes do not require tests because _____ <!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.--> <!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. --> Source-Repo: https://github.com/servo/servo Source-Revision: 474369618965569407d127b1e8c481e757cc59d3 --HG-- extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear extra : subtree_revision : 421aa68def8e17f70580477a4203494db3b69382
90 lines
2.8 KiB
Rust
90 lines
2.8 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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use core::nonzero::NonZero;
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use dom::bindings::js::{MutNullableJS, Root};
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use dom::bindings::reflector::DomObject;
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use dom::bindings::trace::JSTraceable;
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use dom::webglrenderingcontext::WebGLRenderingContext;
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use heapsize::HeapSizeOf;
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use js::jsapi::JSObject;
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use std::any::Any;
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use super::{WebGLExtension, WebGLExtensions};
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/// Trait used internally by WebGLExtensions to store and
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/// handle the different WebGL extensions in a common list.
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pub trait WebGLExtensionWrapper: JSTraceable + HeapSizeOf {
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fn instance_or_init(&self,
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ctx: &WebGLRenderingContext,
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ext: &WebGLExtensions)
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-> NonZero<*mut JSObject>;
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fn is_supported(&self, &WebGLExtensions) -> bool;
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fn is_enabled(&self) -> bool;
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fn enable(&self, ext: &WebGLExtensions);
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fn name(&self) -> &'static str;
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fn as_any(&self) -> &Any;
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}
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#[must_root]
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#[derive(HeapSizeOf, JSTraceable)]
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pub struct TypedWebGLExtensionWrapper<T: WebGLExtension> {
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extension: MutNullableJS<T::Extension>
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}
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/// Typed WebGL Extension implementation.
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/// Exposes the exact MutNullableJS<DOMObject> type defined by the extension.
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impl<T: WebGLExtension> TypedWebGLExtensionWrapper<T> {
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pub fn new() -> TypedWebGLExtensionWrapper<T> {
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TypedWebGLExtensionWrapper {
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extension: MutNullableJS::new(None)
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}
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}
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}
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impl<T> WebGLExtensionWrapper for TypedWebGLExtensionWrapper<T>
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where T: WebGLExtension + JSTraceable + HeapSizeOf + 'static {
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#[allow(unsafe_code)]
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fn instance_or_init(&self,
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ctx: &WebGLRenderingContext,
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ext: &WebGLExtensions)
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-> NonZero<*mut JSObject> {
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let mut enabled = true;
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let extension = self.extension.or_init(|| {
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enabled = false;
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T::new(ctx)
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});
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if !enabled {
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self.enable(ext);
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}
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unsafe {
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NonZero::new_unchecked(extension.reflector().get_jsobject().get())
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}
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}
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fn is_supported(&self, ext: &WebGLExtensions) -> bool {
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self.is_enabled() || T::is_supported(ext)
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}
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fn is_enabled(&self) -> bool {
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self.extension.get().is_some()
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}
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fn enable(&self, ext: &WebGLExtensions) {
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T::enable(ext);
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}
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fn name(&self) -> &'static str {
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T::name()
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}
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fn as_any<'a>(&'a self) -> &'a Any {
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self
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}
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}
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impl<T> TypedWebGLExtensionWrapper<T> where T: WebGLExtension + JSTraceable + HeapSizeOf + 'static {
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pub fn dom_object(&self) -> Option<Root<T::Extension>> {
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self.extension.get()
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}
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}
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