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chore: follow-up to #11197 (#11213)

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* simplify

* make each item first nodes explicit

* remove a couple of var declarations
pull/11223/head
Rich Harris 1 year ago committed by GitHub
parent 4b59ef3c41
commit 70b47de124
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GPG Key ID: B5690EEEBB952194
5 changed files with 42 additions and 61 deletions
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36
packages/svelte/src/internal/client/dom/blocks/each.js
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@ -25,6 +25,7 @@ import {
import { source, mutable_source, set } from '../../reactivity/sources.js';
import { is_array, is_frozen } from '../../utils.js';
import { INERT, STATE_SYMBOL } from '../../constants.js';
import { push_template_node } from '../template.js';
/**
* The row of a keyed each block that is currently updating. We track this
@ -168,10 +169,11 @@ export function each(anchor, flags, get_collection, get_key, render_fn, fallback
break;
}
var child_open = /** @type {Comment} */ (child_anchor);
child_anchor = hydrate_anchor(child_anchor);
var value = array[i];
var key = get_key(value, i);
item = create_item(child_anchor, prev, null, value, key, i, render_fn, flags);
item = create_item(child_open, child_anchor, prev, null, value, key, i, render_fn, flags);
state.items.set(key, item);
child_anchor = /** @type {Comment} */ (child_anchor.nextSibling);
@ -278,8 +280,14 @@ function reconcile(array, state, anchor, render_fn, flags, get_key) {
item = items.get(key);
if (item === undefined) {
var child_open = /** @type {Text} */ (push_template_node(empty()));
var child_anchor = current ? current.o : anchor;
child_anchor.before(child_open);
prev = create_item(
current ? get_first_child(current) : anchor,
child_open,
child_anchor,
prev,
prev.next,
value,
@ -312,7 +320,7 @@ function reconcile(array, state, anchor, render_fn, flags, get_key) {
if (matched.length < stashed.length) {
// more efficient to move later items to the front
var start = stashed[0];
var local_anchor = get_first_child(start);
var local_anchor = start.o;
var j;
prev = start.prev;
@ -341,7 +349,7 @@ function reconcile(array, state, anchor, render_fn, flags, get_key) {
} else {
// more efficient to move earlier items to the back
seen.delete(item);
move(item, current ? get_first_child(current) : anchor);
move(item, current ? current.o : anchor);
link(item.prev, item.next);
link(item, prev.next);
@ -402,20 +410,6 @@ function reconcile(array, state, anchor, render_fn, flags, get_key) {
}
}
/**
* @param {import('#client').EachItem} item
* @returns {Text | Element | Comment}
*/
function get_first_child(item) {
var current = item.e.dom;
if (is_array(current)) {
return /** @type {Text | Element | Comment} */ (current[0]);
}
return /** @type {Text | Element | Comment} */ (current);
}
/**
* @param {import('#client').EachItem} item
* @param {any} value
@ -437,6 +431,7 @@ function update_item(item, value, index, type) {
/**
* @template V
* @param {Comment | Text} open
* @param {Node} anchor
* @param {import('#client').EachItem | import('#client').EachState} prev
* @param {import('#client').EachItem | null} next
@ -447,7 +442,7 @@ function update_item(item, value, index, type) {
* @param {number} flags
* @returns {import('#client').EachItem}
*/
function create_item(anchor, prev, next, value, key, index, render_fn, flags) {
function create_item(open, anchor, prev, next, value, key, index, render_fn, flags) {
var previous_each_item = current_each_item;
try {
@ -465,6 +460,7 @@ function create_item(anchor, prev, next, value, key, index, render_fn, flags) {
a: null,
// @ts-expect-error
e: null,
o: open,
prev,
next
};
@ -486,6 +482,8 @@ function create_item(anchor, prev, next, value, key, index, render_fn, flags) {
* @param {Text | Element | Comment} anchor
*/
function move(item, anchor) {
anchor.before(item.o);
var dom = item.e.dom;
if (dom !== null) {

4
packages/svelte/src/internal/client/dom/blocks/html.js
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@ -79,7 +79,7 @@ function html_to_dom(target, effect, value, svg) {
var child = /** @type {Text | Element | Comment} */ (node.firstChild);
target.before(child);
if (effect !== null) {
push_template_node(effect, child);
push_template_node(child, effect);
}
return child;
}
@ -95,7 +95,7 @@ function html_to_dom(target, effect, value, svg) {
}
if (effect !== null) {
push_template_node(effect, nodes);
push_template_node(nodes, effect);
}
return nodes;

2
packages/svelte/src/internal/client/dom/blocks/svelte-element.js
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@ -133,7 +133,7 @@ export function element(anchor, get_tag, is_svg, render_fn) {
swap_block_dom(parent_effect, prev_element, element);
prev_element.remove();
} else if (!hydrating) {
push_template_node(parent_effect, element);
push_template_node(element, parent_effect);
}
});
}

59
packages/svelte/src/internal/client/dom/template.js
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@ -7,10 +7,13 @@ import { effect } from '../reactivity/effects.js';
import { is_array } from '../utils.js';
/**
* @param {import("#client").Effect} effect
* @param {import("#client").TemplateNode | import("#client").TemplateNode[]} dom
* @param {import("#client").Effect} effect
*/
export function push_template_node(effect, dom) {
export function push_template_node(
dom,
effect = /** @type {import('#client').Effect} */ (current_effect)
) {
var current_dom = effect.dom;
if (current_dom === null) {
effect.dom = dom;
@ -18,19 +21,12 @@ export function push_template_node(effect, dom) {
if (!is_array(current_dom)) {
current_dom = effect.dom = [current_dom];
}
var anchor;
// If we're working with an anchor, then remove it and put it at the end.
if (current_dom[0].nodeType === 8) {
anchor = current_dom.pop();
}
if (is_array(dom)) {
current_dom.push(...dom);
} else {
current_dom.push(dom);
}
if (anchor !== undefined) {
current_dom.push(anchor);
}
}
return dom;
}
@ -49,12 +45,8 @@ export function template(content, flags) {
var node;
return () => {
var effect = /** @type {import('#client').Effect} */ (current_effect);
if (hydrating) {
var hydration_content = push_template_node(
effect,
is_fragment ? hydrate_nodes : hydrate_nodes[0]
);
var hydration_content = push_template_node(is_fragment ? hydrate_nodes : hydrate_nodes[0]);
return /** @type {Node} */ (hydration_content);
}
@ -64,14 +56,11 @@ export function template(content, flags) {
}
var clone = use_import_node ? document.importNode(node, true) : clone_node(node, true);
if (is_fragment) {
push_template_node(
effect,
/** @type {import('#client').TemplateNode[]} */ ([...clone.childNodes])
);
} else {
push_template_node(effect, /** @type {import('#client').TemplateNode} */ (clone));
}
push_template_node(
is_fragment
? /** @type {import('#client').TemplateNode[]} */ ([...clone.childNodes])
: /** @type {import('#client').TemplateNode} */ (clone)
);
return clone;
};
@ -115,12 +104,8 @@ export function svg_template(content, flags) {
var node;
return () => {
var effect = /** @type {import('#client').Effect} */ (current_effect);
if (hydrating) {
var hydration_content = push_template_node(
effect,
is_fragment ? hydrate_nodes : hydrate_nodes[0]
);
var hydration_content = push_template_node(is_fragment ? hydrate_nodes : hydrate_nodes[0]);
return /** @type {Node} */ (hydration_content);
}
@ -139,14 +124,11 @@ export function svg_template(content, flags) {
var clone = clone_node(node, true);
if (is_fragment) {
push_template_node(
effect,
/** @type {import('#client').TemplateNode[]} */ ([...clone.childNodes])
);
} else {
push_template_node(effect, /** @type {import('#client').TemplateNode} */ (clone));
}
push_template_node(
is_fragment
? /** @type {import('#client').TemplateNode[]} */ ([...clone.childNodes])
: /** @type {import('#client').TemplateNode} */ (clone)
);
return clone;
};
@ -213,8 +195,7 @@ function run_scripts(node) {
*/
/*#__NO_SIDE_EFFECTS__*/
export function text(anchor) {
var effect = /** @type {import('#client').Effect} */ (current_effect);
if (!hydrating) return push_template_node(effect, empty());
if (!hydrating) return push_template_node(empty());
var node = hydrate_nodes[0];
@ -224,7 +205,7 @@ export function text(anchor) {
anchor.before((node = empty()));
}
return push_template_node(effect, node);
return push_template_node(node);
}
export const comment = template('<!>', TEMPLATE_FRAGMENT);

2
packages/svelte/src/internal/client/types.d.ts vendored
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@ -67,6 +67,8 @@ export type EachItem = {
i: number | Source<number>;
/** key */
k: unknown;
/** anchor for items inserted before this */
o: Comment | Text;
prev: EachItem | EachState;
next: EachItem | null;
};

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