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Implement CEReactions codegen

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This commit is contained in:
Connor Brewster 2017-07-10 10:45:26 -06:00
parent e57ed3d42f
commit 438191e0b2
4 changed files with 73 additions and 15 deletions
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48
components/script/dom/customelementregistry.rs
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@ -33,6 +33,7 @@ use microtask::Microtask;
use script_thread::ScriptThread;
use std::cell::Cell;
use std::collections::{HashMap, VecDeque};
use std::mem;
use std::ops::Deref;
use std::ptr;
use std::rc::Rc;
@ -495,6 +496,7 @@ enum BackupElementQueueFlag {
#[derive(HeapSizeOf, JSTraceable)]
#[must_root]
pub struct CustomElementReactionStack {
stack: DOMRefCell<Vec<ElementQueue>>,
backup_queue: ElementQueue,
processing_backup_element_queue: Cell<BackupElementQueueFlag>,
}
@ -502,11 +504,29 @@ pub struct CustomElementReactionStack {
impl CustomElementReactionStack {
pub fn new() -> CustomElementReactionStack {
CustomElementReactionStack {
stack: DOMRefCell::new(Vec::new()),
backup_queue: ElementQueue::new(),
processing_backup_element_queue: Cell::new(BackupElementQueueFlag::NotProcessing),
}
}
pub fn push_new_element_queue(&self) {
self.stack.borrow_mut().push(ElementQueue::new());
}
pub fn pop_current_element_queue(&self) {
rooted_vec!(let mut stack);
mem::swap(&mut *stack, &mut *self.stack.borrow_mut());
if let Some(current_queue) = stack.last() {
current_queue.invoke_reactions();
}
stack.pop();
mem::swap(&mut *self.stack.borrow_mut(), &mut *stack);
self.stack.borrow_mut().append(&mut *stack);
}
/// https://html.spec.whatwg.org/multipage/#enqueue-an-element-on-the-appropriate-element-queue
/// Step 4
pub fn invoke_backup_element_queue(&self) {
@ -519,22 +539,24 @@ impl CustomElementReactionStack {
/// https://html.spec.whatwg.org/multipage/#enqueue-an-element-on-the-appropriate-element-queue
pub fn enqueue_element(&self, element: &Element) {
// TODO: Steps 1 - 2
// Support multiple queues
if let Some(current_queue) = self.stack.borrow().last() {
// Step 2
current_queue.append_element(element);
} else {
// Step 1.1
self.backup_queue.append_element(element);
// Step 1.1
self.backup_queue.append_element(element);
// Step 1.2
if self.processing_backup_element_queue.get() == BackupElementQueueFlag::Processing {
return;
}
// Step 1.2
if self.processing_backup_element_queue.get() == BackupElementQueueFlag::Processing {
return;
// Step 1.3
self.processing_backup_element_queue.set(BackupElementQueueFlag::Processing);
// Step 4
ScriptThread::enqueue_microtask(Microtask::CustomElementReaction);
}
// Step 1.3
self.processing_backup_element_queue.set(BackupElementQueueFlag::Processing);
// Step 4
ScriptThread::enqueue_microtask(Microtask::CustomElementReaction);
}
/// https://html.spec.whatwg.org/multipage/#enqueue-a-custom-element-callback-reaction