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@@ -18,6 +18,14 @@
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//! always make sure to copy over the ID. If we don't do this properly, the ElementId will be populated incorrectly and
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//! brick the user's page.
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//!
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+//! ### Fragment Support
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+//!
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+//! Fragments (nodes without a parent) are supported through a combination of "replace with" and anchor vnodes. Fragments
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+//! can be particularly challenging when they are empty, so the placeholder node lets us "reserve" a spot for the empty
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+//! fragment to be replaced with when it is no longer empty. This is guaranteed by logic in the NodeFactory - it is
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+//! impossible to craft a fragment with 0 elements - they must always have at least a single placeholder element. This is
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+//! slightly inefficient, but represents a such an uncommon use case that it is not worth optimizing.
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+//!
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//! ## Subtree Memoization
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//! -----------------------
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//! We also employ "subtree memoization" which saves us from having to check trees which take no dynamic content. We can
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@@ -45,6 +53,11 @@
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//! so the client only needs to maintain a simple list of nodes. By default, Dioxus will not manually clean up old nodes
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//! for the client. As new nodes are created, old nodes will be over-written.
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//!
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+//! HEADS-UP:
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+//! For now, deferred garabge collection is disabled. The code-paths are almost wired up, but it's quite complex to
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+//! get working safely and efficiently. For now, garabge is collected immediately during diffing. This adds extra
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+//! overhead, but is faster to implement in the short term.
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+//!
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//! Further Reading and Thoughts
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//! ----------------------------
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//! There are more ways of increasing diff performance here that are currently not implemented.
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@@ -77,30 +90,48 @@ pub struct DiffMachine<'real, 'bump> {
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pub edits: &'real mut Vec<DomEdit<'bump>>,
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- pub scheduled_garbage: Vec<&'bump VNode<'bump>>,
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-
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- pub cur_idxs: SmallVec<[ScopeId; 5]>,
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+ pub scope_stack: SmallVec<[ScopeId; 5]>,
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pub diffed: FxHashSet<ScopeId>,
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- pub seen_nodes: FxHashSet<ScopeId>,
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+ // will be used later for garbage collection
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+ // we check every seen node and then schedule its eventual deletion
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+ pub seen_scopes: FxHashSet<ScopeId>,
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}
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impl<'real, 'bump> DiffMachine<'real, 'bump> {
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- pub fn new(
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+ pub(crate) fn new(
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+ edits: &'real mut Vec<DomEdit<'bump>>,
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+ dom: &'real dyn RealDom<'bump>,
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+ cur_scope: ScopeId,
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+ shared: &'bump SharedResources,
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+ ) -> Self {
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+ Self {
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+ real_dom: dom,
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+ edits,
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+ scope_stack: smallvec![cur_scope],
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+ vdom: shared,
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+ diffed: FxHashSet::default(),
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+ seen_scopes: FxHashSet::default(),
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+ }
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+ }
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+
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+ /// Allows the creation of a diff machine without the concept of scopes or a virtualdom
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+ /// this is mostly useful for testing
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+ ///
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+ /// This will PANIC if any component elements are passed in.
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+ pub fn new_headless(
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edits: &'real mut Vec<DomEdit<'bump>>,
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dom: &'real dyn RealDom<'bump>,
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- cur_idx: ScopeId,
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shared: &'bump SharedResources,
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) -> Self {
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Self {
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real_dom: dom,
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edits,
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- cur_idxs: smallvec![cur_idx],
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+ scope_stack: smallvec![ScopeId(0)],
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vdom: shared,
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- scheduled_garbage: vec![],
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diffed: FxHashSet::default(),
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- seen_nodes: FxHashSet::default(),
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+ seen_scopes: FxHashSet::default(),
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}
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}
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@@ -111,41 +142,35 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
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//
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// each function call assumes the stack is fresh (empty).
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pub fn diff_node(&mut self, old_node: &'bump VNode<'bump>, new_node: &'bump VNode<'bump>) {
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- let root = old_node.dom_id.get();
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-
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match (&old_node.kind, &new_node.kind) {
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// Handle the "sane" cases first.
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// The rsx and html macros strongly discourage dynamic lists not encapsulated by a "Fragment".
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// So the sane (and fast!) cases are where the virtual structure stays the same and is easily diffable.
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(VNodeKind::Text(old), VNodeKind::Text(new)) => {
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- let root = root.unwrap();
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+ let root = old_node.direct_id();
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if old.text != new.text {
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- self.push_root(root);
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- self.set_text(new.text);
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- self.pop();
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+ self.edit_push_root(root);
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+ self.edit_set_text(new.text);
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+ self.edit_pop();
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}
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- new_node.dom_id.set(Some(root));
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+ new.dom_id.set(Some(root));
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}
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(VNodeKind::Element(old), VNodeKind::Element(new)) => {
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- let root = root.unwrap();
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+ let root = old_node.direct_id();
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// If the element type is completely different, the element needs to be re-rendered completely
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// This is an optimization React makes due to how users structure their code
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//
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// This case is rather rare (typically only in non-keyed lists)
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if new.tag_name != old.tag_name || new.namespace != old.namespace {
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- self.push_root(root);
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- let meta = self.create(new_node);
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- self.replace_with(meta.added_to_stack);
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- self.scheduled_garbage.push(old_node);
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- self.pop();
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+ self.replace_node_with_node(root, old_node, new_node);
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return;
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}
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- new_node.dom_id.set(Some(root));
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+ new.dom_id.set(Some(root));
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// Don't push the root if we don't have to
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let mut has_comitted = false;
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@@ -166,17 +191,17 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
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for (old_attr, new_attr) in old.attributes.iter().zip(new.attributes.iter()) {
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if old_attr.value != new_attr.value {
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please_commit(&mut self.edits);
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- self.set_attribute(new_attr);
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+ self.edit_set_attribute(new_attr);
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}
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}
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} else {
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// TODO: provide some sort of report on how "good" the diffing was
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please_commit(&mut self.edits);
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for attribute in old.attributes {
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- self.remove_attribute(attribute);
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+ self.edit_remove_attribute(attribute);
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}
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for attribute in new.attributes {
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- self.set_attribute(attribute)
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+ self.edit_set_attribute(attribute)
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}
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}
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@@ -186,33 +211,38 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
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// In the cases where the listeners change, we completely wipe the data attributes and add new ones
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//
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// TODO: take a more efficient path than this
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+ let cur_scope: ScopeId = self.scope_stack.last().unwrap().clone();
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if old.listeners.len() == new.listeners.len() {
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for (old_l, new_l) in old.listeners.iter().zip(new.listeners.iter()) {
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if old_l.event != new_l.event {
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please_commit(&mut self.edits);
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- self.remove_event_listener(old_l.event);
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- self.new_event_listener(new_l);
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+ self.edit_remove_event_listener(old_l.event);
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+ self.edit_new_event_listener(new_l, cur_scope);
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}
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new_l.mounted_node.set(old_l.mounted_node.get());
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+ self.fix_listener(new_l);
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}
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} else {
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please_commit(&mut self.edits);
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for listener in old.listeners {
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- self.remove_event_listener(listener.event);
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+ self.edit_remove_event_listener(listener.event);
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}
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for listener in new.listeners {
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listener.mounted_node.set(Some(root));
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- self.new_event_listener(listener);
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+ self.edit_new_event_listener(listener, cur_scope);
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+
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+ // Make sure the listener gets attached to the scope list
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+ self.fix_listener(listener);
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}
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}
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if has_comitted {
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- self.pop();
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+ self.edit_pop();
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}
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// Each child pushes its own root, so it doesn't need our current root
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- self.diff_children(old.children, new.children, None, &mut None);
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+ self.diff_children(old.children, new.children);
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}
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(VNodeKind::Component(old), VNodeKind::Component(new)) => {
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@@ -221,7 +251,7 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
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// Make sure we're dealing with the same component (by function pointer)
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if old.user_fc == new.user_fc {
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//
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- self.cur_idxs.push(scope_addr);
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+ self.scope_stack.push(scope_addr);
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// Make sure the new component vnode is referencing the right scope id
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new.ass_scope.set(Some(scope_addr));
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@@ -246,9 +276,9 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
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}
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}
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- self.cur_idxs.pop();
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+ self.scope_stack.pop();
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- self.seen_nodes.insert(scope_addr);
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+ self.seen_scopes.insert(scope_addr);
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} else {
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let mut old_iter = RealChildIterator::new(old_node, &self.vdom);
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let first = old_iter
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@@ -257,16 +287,12 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
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// remove any leftovers
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for to_remove in old_iter {
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- self.push_root(to_remove.element_id().unwrap());
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- self.remove();
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+ self.edit_push_root(to_remove.direct_id());
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+ self.edit_remove();
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}
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// seems like we could combine this into a single instruction....
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- self.push_root(first.element_id().unwrap());
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- let meta = self.create(new_node);
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- self.replace_with(meta.added_to_stack);
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- self.scheduled_garbage.push(old_node);
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- self.pop();
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+ self.replace_node_with_node(first.direct_id(), old_node, new_node);
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// Wipe the old one and plant the new one
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let old_scope = old.ass_scope.get().unwrap();
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@@ -282,16 +308,11 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
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return;
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}
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- let mut new_anchor = None;
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- self.diff_children(
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- old.children,
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- new.children,
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- old_node.dom_id.get(),
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- &mut new_anchor,
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- );
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- if let Some(anchor) = new_anchor {
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- new_node.dom_id.set(Some(anchor));
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- }
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+ self.diff_children(old.children, new.children);
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+ }
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+
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+ (VNodeKind::Anchor(old), VNodeKind::Anchor(new)) => {
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+ new.dom_id.set(old.dom_id.get());
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}
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// The strategy here is to pick the first possible node from the previous set and use that as our replace with root
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@@ -305,54 +326,57 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
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VNodeKind::Component(_)
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| VNodeKind::Fragment(_)
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| VNodeKind::Text(_)
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- | VNodeKind::Element(_),
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+ | VNodeKind::Element(_)
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+ | VNodeKind::Anchor(_),
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VNodeKind::Component(_)
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| VNodeKind::Fragment(_)
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| VNodeKind::Text(_)
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- | VNodeKind::Element(_),
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+ | VNodeKind::Element(_)
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+ | VNodeKind::Anchor(_),
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) => {
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- log::info!(
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- "taking the awkard diffing path {:#?}, {:#?}",
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- old_node,
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- new_node
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- );
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- // currently busted for components - need to fid
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- let root = old_node.dom_id.get().expect(&format!(
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- "Should not be diffing old nodes that were never assigned, {:#?}",
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- old_node
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- ));
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- // Choose the node to use as the placeholder for replacewith
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- let back_node_id = match old_node.kind {
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- // We special case these two types to avoid allocating the small-vecs
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- VNodeKind::Element(_) | VNodeKind::Text(_) => root,
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-
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- _ => {
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- let mut old_iter = RealChildIterator::new(old_node, &self.vdom);
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-
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- let back_node = old_iter
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- .next()
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- .expect("Empty fragments should generate a placeholder.");
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-
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- // remove any leftovers
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- for to_remove in old_iter {
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- self.push_root(to_remove.element_id().unwrap());
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- self.remove();
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- }
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-
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- back_node.element_id().unwrap()
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- }
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- };
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+ todo!();
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+ // log::info!(
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+ // "taking the awkard diffing path {:#?}, {:#?}",
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+ // old_node,
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+ // new_node
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+ // );
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+ // // currently busted for components - need to fid
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+ // let root = old_node.dom_id.get().expect(&format!(
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+ // "Should not be diffing old nodes that were never assigned, {:#?}",
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+ // old_node
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+ // ));
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+ // // Choose the node to use as the placeholder for replacewith
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+ // let back_node_id = match old_node.kind {
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+ // // We special case these two types to avoid allocating the small-vecs
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+ // VNodeKind::Element(_) | VNodeKind::Text(_) => root,
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+
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+ // _ => {
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+ // let mut old_iter = RealChildIterator::new(old_node, &self.vdom);
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+
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+ // let back_node = old_iter
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+ // .next()
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+ // .expect("Empty fragments should generate a placeholder.");
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+
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+ // // remove any leftovers
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+ // for to_remove in old_iter {
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+ // self.edit_push_root(to_remove.dom_id().unwrap());
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+ // self.edit_remove();
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+ // }
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+
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+ // back_node.dom_id().unwrap()
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+ // }
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+ // };
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- // replace the placeholder or first node with the nodes generated from the "new"
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- self.push_root(back_node_id);
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- let meta = self.create(new_node);
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- self.replace_with(meta.added_to_stack);
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+ // // replace the placeholder or first node with the nodes generated from the "new"
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+ // self.edit_push_root(back_node_id);
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+ // let meta = self.create_vnode(new_node);
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+ // self.edit_replace_with(meta.added_to_stack);
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- // todo use the is_static metadata to update this subtree
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+ // // todo use the is_static metadata to update this subtree
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}
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// TODO
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- (VNodeKind::Suspended { node }, new) => todo!(),
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+ (VNodeKind::Suspended(node), new) => todo!(),
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(old, VNodeKind::Suspended { .. }) => {
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// a node that was once real is now suspended
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//
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@@ -369,16 +393,23 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
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// When this function returns, the new node is on top of the change list stack:
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//
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// [... node]
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- pub fn create(&mut self, node: &'bump VNode<'bump>) -> CreateMeta {
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+ pub fn create_vnode(&mut self, node: &'bump VNode<'bump>) -> CreateMeta {
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log::warn!("Creating node! ... {:#?}", node);
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match &node.kind {
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VNodeKind::Text(text) => {
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let real_id = self.vdom.reserve_node();
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- self.create_text_node(text.text, real_id);
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- node.dom_id.set(Some(real_id));
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-
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+ self.edit_create_text_node(text.text, real_id);
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+ text.dom_id.set(Some(real_id));
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CreateMeta::new(text.is_static, 1)
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}
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+
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+ VNodeKind::Anchor(anchor) => {
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+ let real_id = self.vdom.reserve_node();
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+ self.edit_create_placeholder(real_id);
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+ anchor.dom_id.set(Some(real_id));
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+ CreateMeta::new(false, 1)
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+ }
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+
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VNodeKind::Element(el) => {
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// we have the potential to completely eliminate working on this node in the future(!)
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//
|
|
@@ -396,20 +427,23 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
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static_attrs: _,
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|
|
static_children: _,
|
|
|
static_listeners: _,
|
|
|
+ dom_id,
|
|
|
} = el;
|
|
|
|
|
|
let real_id = self.vdom.reserve_node();
|
|
|
if let Some(namespace) = namespace {
|
|
|
- self.create_element(tag_name, Some(namespace), real_id)
|
|
|
+ self.edit_create_element(tag_name, Some(namespace), real_id)
|
|
|
} else {
|
|
|
- self.create_element(tag_name, None, real_id)
|
|
|
+ self.edit_create_element(tag_name, None, real_id)
|
|
|
};
|
|
|
- node.dom_id.set(Some(real_id));
|
|
|
+ dom_id.set(Some(real_id));
|
|
|
|
|
|
+ let cur_scope = self.current_scope().unwrap();
|
|
|
listeners.iter().for_each(|listener| {
|
|
|
log::info!("setting listener id to {:#?}", real_id);
|
|
|
+ self.fix_listener(listener);
|
|
|
listener.mounted_node.set(Some(real_id));
|
|
|
- self.new_event_listener(listener);
|
|
|
+ self.edit_new_event_listener(listener, cur_scope.clone());
|
|
|
|
|
|
// if the node has an event listener, then it must be visited ?
|
|
|
is_static = false;
|
|
@@ -417,7 +451,7 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
|
|
|
|
|
|
for attr in *attributes {
|
|
|
is_static = is_static && attr.is_static;
|
|
|
- self.set_attribute(attr);
|
|
|
+ self.edit_set_attribute(attr);
|
|
|
}
|
|
|
|
|
|
// Fast path: if there is a single text child, it is faster to
|
|
@@ -438,20 +472,13 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
|
|
|
// }
|
|
|
|
|
|
for child in *children {
|
|
|
- let child_meta = self.create(child);
|
|
|
+ let child_meta = self.create_vnode(child);
|
|
|
is_static = is_static && child_meta.is_static;
|
|
|
|
|
|
// append whatever children were generated by this call
|
|
|
- self.append_children(child_meta.added_to_stack);
|
|
|
+ self.edit_append_children(child_meta.added_to_stack);
|
|
|
}
|
|
|
|
|
|
- // if is_static {
|
|
|
- // log::debug!("created a static node {:#?}", node);
|
|
|
- // } else {
|
|
|
- // log::debug!("created a dynamic node {:#?}", node);
|
|
|
- // }
|
|
|
-
|
|
|
- // el_is_static.set(is_static);
|
|
|
CreateMeta::new(is_static, 1)
|
|
|
}
|
|
|
|
|
@@ -459,7 +486,7 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
|
|
|
log::debug!("Mounting a new component");
|
|
|
let caller = vcomponent.caller.clone();
|
|
|
|
|
|
- let parent_idx = self.cur_idxs.last().unwrap().clone();
|
|
|
+ let parent_idx = self.scope_stack.last().unwrap().clone();
|
|
|
|
|
|
// Insert a new scope into our component list
|
|
|
let new_idx = self.vdom.insert_scope_with_key(|new_idx| {
|
|
@@ -475,17 +502,6 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
|
|
|
)
|
|
|
});
|
|
|
|
|
|
- // This code is supposed to insert the new idx into the parent's descendent list, but it doesn't really work.
|
|
|
- // This is mostly used for cleanup - to remove old scopes when components are destroyed.
|
|
|
- // TODO
|
|
|
- //
|
|
|
- // self.components
|
|
|
- // .try_get_mut(idx)
|
|
|
- // .unwrap()
|
|
|
- // .descendents
|
|
|
- // .borrow_mut()
|
|
|
- // .insert(idx);
|
|
|
-
|
|
|
// TODO: abstract this unsafe into the arena abstraction
|
|
|
let new_component = self.get_scope_mut(&new_idx).unwrap();
|
|
|
|
|
@@ -495,15 +511,24 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
|
|
|
// Run the scope for one iteration to initialize it
|
|
|
new_component.run_scope().unwrap();
|
|
|
|
|
|
- // TODO: we need to delete (IE relcaim this node, otherwise the arena will grow infinitely)
|
|
|
+ // Take the node that was just generated from running the component
|
|
|
let nextnode = new_component.frames.fin_head();
|
|
|
- self.cur_idxs.push(new_idx);
|
|
|
- let meta = self.create(nextnode);
|
|
|
- self.cur_idxs.pop();
|
|
|
- node.dom_id.set(nextnode.dom_id.get());
|
|
|
|
|
|
- // Finally, insert this node as a seen node.
|
|
|
- self.seen_nodes.insert(new_idx);
|
|
|
+ // Push the new scope onto the stack
|
|
|
+ self.scope_stack.push(new_idx);
|
|
|
+
|
|
|
+ // Run the creation algorithm with this scope on the stack
|
|
|
+ let meta = self.create_vnode(nextnode);
|
|
|
+
|
|
|
+ // pop the scope off the stack
|
|
|
+ self.scope_stack.pop();
|
|
|
+
|
|
|
+ if meta.added_to_stack == 0 {
|
|
|
+ panic!("This should never happen");
|
|
|
+ }
|
|
|
+
|
|
|
+ // Finally, insert this scope as a seen node.
|
|
|
+ self.seen_scopes.insert(new_idx);
|
|
|
|
|
|
CreateMeta::new(vcomponent.is_static, meta.added_to_stack)
|
|
|
}
|
|
@@ -511,27 +536,15 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
|
|
|
// Fragments are the only nodes that can contain dynamic content (IE through curlies or iterators).
|
|
|
// We can never ignore their contents, so the prescence of a fragment indicates that we need always diff them.
|
|
|
// Fragments will just put all their nodes onto the stack after creation
|
|
|
- VNodeKind::Fragment(frag) => {
|
|
|
- let mut nodes_added = 0;
|
|
|
- for child in frag.children.iter().rev() {
|
|
|
- // different types of nodes will generate different amounts on the stack
|
|
|
- // nested fragments will spew a ton of nodes onto the stack
|
|
|
- // TODO: make sure that our order (.rev) makes sense in a nested situation
|
|
|
- let new_meta = self.create(child);
|
|
|
- nodes_added += new_meta.added_to_stack;
|
|
|
- }
|
|
|
- log::info!("This fragment added {} nodes to the stack", nodes_added);
|
|
|
-
|
|
|
- // Never ignore
|
|
|
- CreateMeta::new(false, nodes_added)
|
|
|
- }
|
|
|
-
|
|
|
- VNodeKind::Suspended { node: real_node } => {
|
|
|
- let id = self.vdom.reserve_node();
|
|
|
- self.create_placeholder(id);
|
|
|
- node.dom_id.set(Some(id));
|
|
|
- real_node.set(Some(id));
|
|
|
- CreateMeta::new(false, 1)
|
|
|
+ VNodeKind::Fragment(frag) => self.create_children(frag.children),
|
|
|
+
|
|
|
+ VNodeKind::Suspended(VSuspended { node: real_node }) => {
|
|
|
+ todo!("wip on adding suspense back in");
|
|
|
+ // let id = self.vdom.reserve_node();
|
|
|
+ // self.edit_create_placeholder(id);
|
|
|
+ // node.dom_id.set(Some(id));
|
|
|
+ // real_node.set(Some(id));
|
|
|
+ // CreateMeta::new(false, 1)
|
|
|
}
|
|
|
}
|
|
|
}
|
|
@@ -541,7 +554,7 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
|
|
|
let mut added_to_stack = 0;
|
|
|
|
|
|
for child in children {
|
|
|
- let child_meta = self.create(child);
|
|
|
+ let child_meta = self.create_vnode(child);
|
|
|
is_static = is_static && child_meta.is_static;
|
|
|
added_to_stack += child_meta.added_to_stack;
|
|
|
}
|
|
@@ -552,8 +565,6 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
|
|
|
}
|
|
|
}
|
|
|
|
|
|
- pub fn replace_vnode(&mut self, old_node: &'bump VNode<'bump>, new_node: &'bump VNode<'bump>) {}
|
|
|
-
|
|
|
/// Destroy a scope and all of its descendents.
|
|
|
///
|
|
|
/// Calling this will run the destuctors on all hooks in the tree.
|
|
@@ -565,7 +576,7 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
|
|
|
// explore the scope tree breadth first
|
|
|
while let Some(scope_id) = scopes_to_explore.pop() {
|
|
|
// If we're planning on deleting this node, then we don't need to both rendering it
|
|
|
- self.seen_nodes.insert(scope_id);
|
|
|
+ self.seen_scopes.insert(scope_id);
|
|
|
let scope = self.get_scope(&scope_id).unwrap();
|
|
|
for child in scope.descendents.borrow().iter() {
|
|
|
// Add this node to be explored
|
|
@@ -598,94 +609,63 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
|
|
|
// If old no anchors are provided, then it's assumed that we can freely append to the parent.
|
|
|
//
|
|
|
// Remember, non-empty lists does not mean that there are real elements, just that there are virtual elements.
|
|
|
- fn diff_children(
|
|
|
- &mut self,
|
|
|
- old: &'bump [VNode<'bump>],
|
|
|
- new: &'bump [VNode<'bump>],
|
|
|
- old_anchor: Option<ElementId>,
|
|
|
- new_anchor: &mut Option<ElementId>,
|
|
|
- ) {
|
|
|
+ fn diff_children(&mut self, old: &'bump [VNode<'bump>], new: &'bump [VNode<'bump>]) {
|
|
|
const IS_EMPTY: bool = true;
|
|
|
const IS_NOT_EMPTY: bool = false;
|
|
|
|
|
|
- match (old_anchor, new.is_empty()) {
|
|
|
- // Both are empty, dealing only with potential anchors
|
|
|
- (Some(anchor), IS_EMPTY) => {
|
|
|
- // new_anchor.set(Some(anchor));
|
|
|
- if old.len() > 0 {
|
|
|
- // clean up these virtual nodes (components, fragments, etc)
|
|
|
- }
|
|
|
- }
|
|
|
+ match (old.is_empty(), new.is_empty()) {
|
|
|
+ (IS_EMPTY, IS_EMPTY) => {}
|
|
|
|
|
|
// Completely adding new nodes, removing any placeholder if it exists
|
|
|
- (Some(anchor), IS_NOT_EMPTY) => {
|
|
|
- //
|
|
|
- // match old_anchor {
|
|
|
- // If there's anchor to work from, then we replace it with the new children
|
|
|
- // Some(anchor) => {
|
|
|
- self.push_root(anchor);
|
|
|
+ (IS_EMPTY, IS_NOT_EMPTY) => {
|
|
|
let meta = self.create_children(new);
|
|
|
- if meta.added_to_stack > 0 {
|
|
|
- self.replace_with(meta.added_to_stack)
|
|
|
- } else {
|
|
|
- // no items added to the stack... hmmmm....
|
|
|
- *new_anchor = old_anchor;
|
|
|
- }
|
|
|
- // }
|
|
|
-
|
|
|
- // If there's no anchor to work with, we just straight up append them
|
|
|
- // None => {
|
|
|
- let meta = self.create_children(new);
|
|
|
- self.append_children(meta.added_to_stack);
|
|
|
- // }
|
|
|
- // }
|
|
|
+ self.edit_append_children(meta.added_to_stack);
|
|
|
}
|
|
|
|
|
|
// Completely removing old nodes and putting an anchor in its place
|
|
|
// no anchor (old has nodes) and the new is empty
|
|
|
// remove all the old nodes
|
|
|
- (None, IS_EMPTY) => {
|
|
|
- // load the first real
|
|
|
- if let Some(to_replace) = find_first_real_node(old, self.vdom) {
|
|
|
- //
|
|
|
- self.push_root(to_replace.dom_id.get().unwrap());
|
|
|
-
|
|
|
- // Create the anchor
|
|
|
- let anchor_id = self.vdom.reserve_node();
|
|
|
- self.create_placeholder(anchor_id);
|
|
|
- // *new_anchor = Some(anchor_id);
|
|
|
-
|
|
|
- // Replace that node
|
|
|
- self.replace_with(1);
|
|
|
- } else {
|
|
|
- // no real nodes -
|
|
|
- // new_anchor.set(old_anchor);
|
|
|
- }
|
|
|
-
|
|
|
- // remove the rest
|
|
|
- for child in &old[1..] {
|
|
|
- self.push_root(child.element_id().unwrap());
|
|
|
- self.remove();
|
|
|
+ (IS_NOT_EMPTY, IS_EMPTY) => {
|
|
|
+ for node in old {
|
|
|
+ self.remove_vnode(node);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
- (None, IS_NOT_EMPTY) => {
|
|
|
- let new_is_keyed = new[0].key.is_some();
|
|
|
- let old_is_keyed = old[0].key.is_some();
|
|
|
-
|
|
|
- debug_assert!(
|
|
|
- new.iter().all(|n| n.key.is_some() == new_is_keyed),
|
|
|
- "all siblings must be keyed or all siblings must be non-keyed"
|
|
|
- );
|
|
|
- debug_assert!(
|
|
|
- old.iter().all(|o| o.key.is_some() == old_is_keyed),
|
|
|
- "all siblings must be keyed or all siblings must be non-keyed"
|
|
|
- );
|
|
|
+ (IS_NOT_EMPTY, IS_NOT_EMPTY) => {
|
|
|
+ let first_old = &old[0];
|
|
|
+ let first_new = &new[0];
|
|
|
|
|
|
- if new_is_keyed && old_is_keyed {
|
|
|
- self.diff_keyed_children(old, new);
|
|
|
- } else {
|
|
|
- self.diff_non_keyed_children(old, new);
|
|
|
+ match (&first_old.kind, &first_new.kind) {
|
|
|
+ (VNodeKind::Anchor(old_anchor), VNodeKind::Anchor(new_anchor)) => {
|
|
|
+ old_anchor.dom_id.set(new_anchor.dom_id.get());
|
|
|
+ }
|
|
|
+ (VNodeKind::Anchor(anchor), _) => {
|
|
|
+ // replace new anchor with many
|
|
|
+ todo!();
|
|
|
+ }
|
|
|
+ (_, VNodeKind::Anchor(anchor)) => {
|
|
|
+ // replace many with new anchor
|
|
|
+ todo!();
|
|
|
+ }
|
|
|
+ _ => {
|
|
|
+ let new_is_keyed = new[0].key.is_some();
|
|
|
+ let old_is_keyed = old[0].key.is_some();
|
|
|
+
|
|
|
+ debug_assert!(
|
|
|
+ new.iter().all(|n| n.key.is_some() == new_is_keyed),
|
|
|
+ "all siblings must be keyed or all siblings must be non-keyed"
|
|
|
+ );
|
|
|
+ debug_assert!(
|
|
|
+ old.iter().all(|o| o.key.is_some() == old_is_keyed),
|
|
|
+ "all siblings must be keyed or all siblings must be non-keyed"
|
|
|
+ );
|
|
|
+
|
|
|
+ if new_is_keyed && old_is_keyed {
|
|
|
+ self.diff_keyed_children(old, new);
|
|
|
+ } else {
|
|
|
+ self.diff_non_keyed_children(old, new);
|
|
|
+ }
|
|
|
+ }
|
|
|
}
|
|
|
}
|
|
|
}
|
|
@@ -795,8 +775,6 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
|
|
|
old: &'bump [VNode<'bump>],
|
|
|
new: &'bump [VNode<'bump>],
|
|
|
) -> KeyedPrefixResult {
|
|
|
- // self.go_down();
|
|
|
-
|
|
|
let mut shared_prefix_count = 0;
|
|
|
|
|
|
for (i, (old, new)) in old.iter().zip(new.iter()).enumerate() {
|
|
@@ -805,8 +783,6 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
|
|
|
break;
|
|
|
}
|
|
|
|
|
|
- // self.go_to_sibling(i);
|
|
|
-
|
|
|
self.diff_node(old, new);
|
|
|
|
|
|
shared_prefix_count += 1;
|
|
@@ -815,8 +791,6 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
|
|
|
// If that was all of the old children, then create and append the remaining
|
|
|
// new children and we're finished.
|
|
|
if shared_prefix_count == old.len() {
|
|
|
- // self.go_up();
|
|
|
- // self.commit_traversal();
|
|
|
self.create_and_append_children(&new[shared_prefix_count..]);
|
|
|
return KeyedPrefixResult::Finished;
|
|
|
}
|
|
@@ -829,28 +803,8 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
|
|
|
self.remove_self_and_next_siblings(&old[shared_prefix_count..]);
|
|
|
return KeyedPrefixResult::Finished;
|
|
|
}
|
|
|
- //
|
|
|
- // self.go_up();
|
|
|
- KeyedPrefixResult::MoreWorkToDo(shared_prefix_count)
|
|
|
- }
|
|
|
|
|
|
- // Remove all of a node's children.
|
|
|
- //
|
|
|
- // The change list stack must have this shape upon entry to this function:
|
|
|
- //
|
|
|
- // [... parent]
|
|
|
- //
|
|
|
- // When this function returns, the change list stack is in the same state.
|
|
|
- fn remove_all_children(&mut self, old: &'bump [VNode<'bump>]) {
|
|
|
- // debug_assert!(self.traversal_is_committed());
|
|
|
- log::debug!("REMOVING CHILDREN");
|
|
|
- for _child in old {
|
|
|
- // registry.remove_subtree(child);
|
|
|
- }
|
|
|
- // Fast way to remove all children: set the node's textContent to an empty
|
|
|
- // string.
|
|
|
- todo!()
|
|
|
- // self.set_inner_text("");
|
|
|
+ KeyedPrefixResult::MoreWorkToDo(shared_prefix_count)
|
|
|
}
|
|
|
|
|
|
// Create the given children and append them to the parent node.
|
|
@@ -862,8 +816,8 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
|
|
|
// When this function returns, the change list stack is in the same state.
|
|
|
pub fn create_and_append_children(&mut self, new: &'bump [VNode<'bump>]) {
|
|
|
for child in new {
|
|
|
- let meta = self.create(child);
|
|
|
- self.append_children(meta.added_to_stack);
|
|
|
+ let meta = self.create_vnode(child);
|
|
|
+ self.edit_append_children(meta.added_to_stack);
|
|
|
}
|
|
|
}
|
|
|
|
|
@@ -881,99 +835,99 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
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//
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// Upon exit from this function, it will be restored to that same state.
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fn diff_keyed_middle(
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- &self,
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- old: &[VNode<'bump>],
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- new: &[VNode<'bump>],
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+ &mut self,
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+ old: &'bump [VNode<'bump>],
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+ new: &'bump [VNode<'bump>],
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shared_prefix_count: usize,
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shared_suffix_count: usize,
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old_shared_suffix_start: usize,
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) {
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- // // Should have already diffed the shared-key prefixes and suffixes.
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- // debug_assert_ne!(new.first().map(|n| n.key()), old.first().map(|o| o.key()));
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- // debug_assert_ne!(new.last().map(|n| n.key()), old.last().map(|o| o.key()));
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-
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- // // The algorithm below relies upon using `u32::MAX` as a sentinel
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- // // value, so if we have that many new nodes, it won't work. This
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- // // check is a bit academic (hence only enabled in debug), since
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- // // wasm32 doesn't have enough address space to hold that many nodes
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- // // in memory.
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- // debug_assert!(new.len() < u32::MAX as usize);
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-
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- // // Map from each `old` node's key to its index within `old`.
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- // // IE if the keys were A B C, then we would have (A, 1) (B, 2) (C, 3).
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- // let mut old_key_to_old_index = old
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- // .iter()
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- // .enumerate()
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- // .map(|(i, o)| (o.key(), i))
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- // .collect::<FxHashMap<_, _>>();
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-
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- // // The set of shared keys between `new` and `old`.
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- // let mut shared_keys = FxHashSet::default();
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-
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- // // Map from each index in `new` to the index of the node in `old` that
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- // // has the same key.
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- // let mut new_index_to_old_index = new
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- // .iter()
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- // .map(|n| {
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- // let key = n.key();
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- // if let Some(&i) = old_key_to_old_index.get(&key) {
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- // shared_keys.insert(key);
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- // i
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- // } else {
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- // u32::MAX as usize
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- // }
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- // })
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- // .collect::<Vec<_>>();
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-
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- // // If none of the old keys are reused by the new children, then we
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- // // remove all the remaining old children and create the new children
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- // // afresh.
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- // if shared_suffix_count == 0 && shared_keys.is_empty() {
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- // if shared_prefix_count == 0 {
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- // // self.commit_traversal();
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- // self.remove_all_children(old);
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- // } else {
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- // // self.go_down_to_child(shared_prefix_count);
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- // // self.commit_traversal();
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- // self.remove_self_and_next_siblings(&old[shared_prefix_count..]);
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- // }
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+ // Should have already diffed the shared-key prefixes and suffixes.
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+ debug_assert_ne!(new.first().map(|n| n.key()), old.first().map(|o| o.key()));
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+ debug_assert_ne!(new.last().map(|n| n.key()), old.last().map(|o| o.key()));
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+
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+ // The algorithm below relies upon using `u32::MAX` as a sentinel
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+ // value, so if we have that many new nodes, it won't work. This
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+ // check is a bit academic (hence only enabled in debug), since
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+ // wasm32 doesn't have enough address space to hold that many nodes
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+ // in memory.
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+ debug_assert!(new.len() < u32::MAX as usize);
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+
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+ // Map from each `old` node's key to its index within `old`.
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+ // IE if the keys were A B C, then we would have (A, 1) (B, 2) (C, 3).
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+ let mut old_key_to_old_index = old
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+ .iter()
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+ .enumerate()
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+ .map(|(i, o)| (o.key(), i))
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+ .collect::<FxHashMap<_, _>>();
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- // self.create_and_append_children(new);
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+ // The set of shared keys between `new` and `old`.
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+ let mut shared_keys = FxHashSet::default();
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- // return;
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- // }
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+ // Map from each index in `new` to the index of the node in `old` that
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+ // has the same key.
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+ let mut new_index_to_old_index = new
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+ .iter()
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+ .map(|n| {
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+ let key = n.key();
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+ if let Some(&i) = old_key_to_old_index.get(&key) {
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+ shared_keys.insert(key);
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+ i
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+ } else {
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+ u32::MAX as usize
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+ }
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+ })
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+ .collect::<Vec<_>>();
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+
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+ // If none of the old keys are reused by the new children, then we
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+ // remove all the remaining old children and create the new children
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+ // afresh.
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+ if shared_suffix_count == 0 && shared_keys.is_empty() {
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+ if shared_prefix_count == 0 {
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+ // self.commit_traversal();
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+ self.remove_all_children(old);
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+ } else {
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+ // self.go_down_to_child(shared_prefix_count);
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+ // self.commit_traversal();
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+ self.remove_self_and_next_siblings(&old[shared_prefix_count..]);
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+ }
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- // // Save each of the old children whose keys are reused in the new
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- // // children.
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- // let mut old_index_to_temp = vec![u32::MAX; old.len()];
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- // let mut start = 0;
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- // loop {
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- // let end = (start..old.len())
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- // .find(|&i| {
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- // let key = old[i].key();
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- // !shared_keys.contains(&key)
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- // })
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- // .unwrap_or(old.len());
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-
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- // if end - start > 0 {
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- // // self.commit_traversal();
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- // let mut t = self.save_children_to_temporaries(
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- // shared_prefix_count + start,
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- // shared_prefix_count + end,
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- // );
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- // for i in start..end {
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- // old_index_to_temp[i] = t;
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- // t += 1;
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- // }
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- // }
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+ self.create_and_append_children(new);
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- // debug_assert!(end <= old.len());
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- // if end == old.len() {
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- // break;
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- // } else {
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- // start = end + 1;
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- // }
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- // }
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+ return;
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+ }
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+
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+ // Save each of the old children whose keys are reused in the new
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+ // children.
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+ let mut old_index_to_temp = vec![u32::MAX; old.len()];
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+ let mut start = 0;
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+ loop {
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+ let end = (start..old.len())
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+ .find(|&i| {
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+ let key = old[i].key();
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+ !shared_keys.contains(&key)
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+ })
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+ .unwrap_or(old.len());
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+
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+ if end - start > 0 {
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+ // self.commit_traversal();
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+ // let mut t = self.save_children_to_temporaries(
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+ // shared_prefix_count + start,
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+ // shared_prefix_count + end,
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+ // );
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+ // for i in start..end {
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+ // old_index_to_temp[i] = t;
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+ // t += 1;
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+ // }
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+ }
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+
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+ debug_assert!(end <= old.len());
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+ if end == old.len() {
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+ break;
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+ } else {
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+ start = end + 1;
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+ }
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+ }
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// // Remove any old children whose keys were not reused in the new
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// // children. Remove from the end first so that we don't mess up indices.
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@@ -1147,17 +1101,13 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
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Ordering::Greater => {
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for item in &old[new.len()..] {
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for i in RealChildIterator::new(item, self.vdom) {
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- self.push_root(i.element_id().unwrap());
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- self.remove();
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+ self.edit_push_root(i.direct_id());
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+ self.edit_remove();
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}
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}
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}
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// old.len < new.len -> adding some nodes
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Ordering::Less => {
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- // [... parent last_child]
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- // self.go_up();
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- // [... parent]
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- // self.commit_traversal();
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self.create_and_append_children(&new[old.len()..]);
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}
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// old.len == new.len -> no nodes added/removed, but πerhaps changed
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@@ -1168,7 +1118,24 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
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// ======================
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// Support methods
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// ======================
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-
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+ // Remove all of a node's children.
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+ //
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+ // The change list stack must have this shape upon entry to this function:
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+ //
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+ // [... parent]
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+ //
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+ // When this function returns, the change list stack is in the same state.
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+ fn remove_all_children(&mut self, old: &'bump [VNode<'bump>]) {
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+ // debug_assert!(self.traversal_is_committed());
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+ log::debug!("REMOVING CHILDREN");
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+ for _child in old {
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+ // registry.remove_subtree(child);
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+ }
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+ // Fast way to remove all children: set the node's textContent to an empty
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+ // string.
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+ todo!()
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+ // self.set_inner_text("");
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+ }
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// Remove the current child and all of its following siblings.
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//
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// The change list stack must have this shape upon entry to this function:
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@@ -1208,10 +1175,78 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
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// self.remove_self_and_next_siblings();
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}
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+ fn create_garbage(&mut self, node: &'bump VNode<'bump>) {
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+ let cur_scope = self.current_scope().unwrap();
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+ let scope = self.get_scope(&cur_scope).unwrap();
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+ let garbage: &'bump VNode<'static> = unsafe { std::mem::transmute(node) };
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+ scope.pending_garbage.borrow_mut().push(garbage);
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+ }
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+
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+ fn immediately_dispose_garabage(&mut self, node: ElementId) {
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+ self.vdom.collect_garbage(node)
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+ }
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+
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+ fn replace_node_with_node(
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+ &mut self,
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+ anchor: ElementId,
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+ old_node: &'bump VNode<'bump>,
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+ new_node: &'bump VNode<'bump>,
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+ ) {
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+ self.edit_push_root(anchor);
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+ let meta = self.create_vnode(new_node);
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+ self.edit_replace_with(meta.added_to_stack);
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+ self.create_garbage(old_node);
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+ self.edit_pop();
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+ }
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+
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+ // assumes
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+ fn remove_many_and_return_the_first_root(&mut self) -> ElementId {
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+ todo!()
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+ }
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+
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+ fn remove_vnode(&mut self, node: &'bump VNode<'bump>) {
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+ match &node.kind {
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+ VNodeKind::Text(el) => self.immediately_dispose_garabage(node.direct_id()),
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+ VNodeKind::Element(el) => {
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+ self.immediately_dispose_garabage(node.direct_id());
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+ for child in el.children {
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+ self.remove_vnode(&child);
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+ }
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+ }
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+ VNodeKind::Anchor(a) => {
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+ //
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+ }
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+ VNodeKind::Fragment(frag) => {
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+ for child in frag.children {
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+ self.remove_vnode(&child);
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+ }
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+ }
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+ VNodeKind::Component(el) => {
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+ //
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+ // self.destroy_scopes(old_scope)
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+ }
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+ VNodeKind::Suspended(_) => todo!(),
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+ }
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+ }
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+
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+ fn current_scope(&self) -> Option<ScopeId> {
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+ self.scope_stack.last().map(|f| f.clone())
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+ }
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+
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+ fn fix_listener<'a>(&mut self, listener: &'a Listener<'a>) {
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+ let scope_id = self.current_scope();
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+ if let Some(scope_id) = scope_id {
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+ let scope = self.get_scope(&scope_id).unwrap();
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+ let mut queue = scope.listeners.borrow_mut();
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+ let long_listener: &'a Listener<'static> = unsafe { std::mem::transmute(listener) };
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+ queue.push(long_listener as *const _)
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+ }
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+ }
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+
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pub fn get_scope_mut(&mut self, id: &ScopeId) -> Option<&'bump mut Scope> {
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// ensure we haven't seen this scope before
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// if we have, then we're trying to alias it, which is not allowed
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- debug_assert!(!self.seen_nodes.contains(id));
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+ debug_assert!(!self.seen_scopes.contains(id));
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unsafe { self.vdom.get_scope_mut(*id) }
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}
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@@ -1222,39 +1257,39 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
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}
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// Navigation
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- pub(crate) fn push_root(&mut self, root: ElementId) {
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+ pub(crate) fn edit_push_root(&mut self, root: ElementId) {
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let id = root.as_u64();
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self.edits.push(PushRoot { id });
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}
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- pub(crate) fn pop(&mut self) {
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+ pub(crate) fn edit_pop(&mut self) {
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self.edits.push(PopRoot {});
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}
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// Add Nodes to the dom
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// add m nodes from the stack
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- pub(crate) fn append_children(&mut self, many: u32) {
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+ pub(crate) fn edit_append_children(&mut self, many: u32) {
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self.edits.push(AppendChildren { many });
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}
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// replace the n-m node on the stack with the m nodes
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// ends with the last element of the chain on the top of the stack
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- pub(crate) fn replace_with(&mut self, many: u32) {
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+ pub(crate) fn edit_replace_with(&mut self, many: u32) {
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self.edits.push(ReplaceWith { many });
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}
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// Remove Nodesfrom the dom
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- pub(crate) fn remove(&mut self) {
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+ pub(crate) fn edit_remove(&mut self) {
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self.edits.push(Remove);
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}
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// Create
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- pub(crate) fn create_text_node(&mut self, text: &'bump str, id: ElementId) {
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+ pub(crate) fn edit_create_text_node(&mut self, text: &'bump str, id: ElementId) {
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let id = id.as_u64();
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self.edits.push(CreateTextNode { text, id });
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}
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- pub(crate) fn create_element(
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+ pub(crate) fn edit_create_element(
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&mut self,
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tag: &'static str,
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ns: Option<&'static str>,
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@@ -1268,16 +1303,15 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
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}
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// placeholders are nodes that don't get rendered but still exist as an "anchor" in the real dom
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- pub(crate) fn create_placeholder(&mut self, id: ElementId) {
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+ pub(crate) fn edit_create_placeholder(&mut self, id: ElementId) {
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let id = id.as_u64();
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self.edits.push(CreatePlaceholder { id });
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}
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// events
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- pub(crate) fn new_event_listener(&mut self, listener: &Listener) {
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+ pub(crate) fn edit_new_event_listener(&mut self, listener: &Listener, scope: ScopeId) {
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let Listener {
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event,
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- scope,
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mounted_node,
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..
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} = listener;
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@@ -1285,22 +1319,22 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
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let element_id = mounted_node.get().unwrap().as_u64();
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self.edits.push(NewEventListener {
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- scope: scope.clone(),
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+ scope,
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event_name: event,
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mounted_node_id: element_id,
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});
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}
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- pub(crate) fn remove_event_listener(&mut self, event: &'static str) {
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+ pub(crate) fn edit_remove_event_listener(&mut self, event: &'static str) {
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self.edits.push(RemoveEventListener { event });
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}
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// modify
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- pub(crate) fn set_text(&mut self, text: &'bump str) {
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+ pub(crate) fn edit_set_text(&mut self, text: &'bump str) {
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self.edits.push(SetText { text });
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}
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- pub(crate) fn set_attribute(&mut self, attribute: &'bump Attribute) {
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+ pub(crate) fn edit_set_attribute(&mut self, attribute: &'bump Attribute) {
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let Attribute {
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name,
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value,
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@@ -1318,7 +1352,7 @@ impl<'real, 'bump> DiffMachine<'real, 'bump> {
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});
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}
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- pub(crate) fn remove_attribute(&mut self, attribute: &Attribute) {
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+ pub(crate) fn edit_remove_attribute(&mut self, attribute: &Attribute) {
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let name = attribute.name;
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self.edits.push(RemoveAttribute { name });
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}
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@@ -1367,7 +1401,7 @@ fn find_first_real_node<'a>(
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///
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/// This iterator is useful when it's important to load the next real root onto the top of the stack for operations like
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/// "InsertBefore".
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-struct RealChildIterator<'a> {
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+pub struct RealChildIterator<'a> {
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scopes: &'a SharedResources,
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// Heuristcally we should never bleed into 4 completely nested fragments/components
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@@ -1377,7 +1411,7 @@ struct RealChildIterator<'a> {
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}
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impl<'a> RealChildIterator<'a> {
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- fn new(starter: &'a VNode<'a>, scopes: &'a SharedResources) -> Self {
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+ pub fn new(starter: &'a VNode<'a>, scopes: &'a SharedResources) -> Self {
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Self {
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scopes,
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stack: smallvec::smallvec![(0, starter)],
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@@ -1420,12 +1454,30 @@ impl<'a> Iterator for RealChildIterator<'a> {
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should_push = Some(&frag.children[subcount]);
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}
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}
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+ // // If we get a fragment we push the next child
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+ // VNodeKind::Fragment(frag) => {
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+ // let subcount = *count as usize;
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+
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+ // if frag.children.len() == 0 {
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+ // should_pop = true;
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+ // returned_node = Some(&*node);
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+ // }
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+
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+ // if subcount >= frag.children.len() {
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+ // should_pop = true;
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+ // } else {
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+ // should_push = Some(&frag.children[subcount]);
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+ // }
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+ // }
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// Immediately abort suspended nodes - can't do anything with them yet
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|
- // VNodeKind::Suspended => should_pop = true,
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|
- VNodeKind::Suspended { node, .. } => {
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|
+ VNodeKind::Suspended(node) => {
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|
|
+ // VNodeKind::Suspended => should_pop = true,
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|
|
+ todo!()
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|
|
+ }
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+
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|
|
+ VNodeKind::Anchor(a) => {
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|
|
todo!()
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|
|
- // *node = node.as_ref().borrow().get().expect("msg");
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|
|
}
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|
// For components, we load their root and push them onto the stack
|