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frustratingly close to getting this working

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proxied-state-each-blocks
Rich Harris 1 year ago
parent 0acdeccb8b
commit 823a6c00e6
8 changed files with 131 additions and 46 deletions
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6
packages/svelte/src/compiler/phases/3-transform/client/visitors/template.js
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@ -2211,7 +2211,7 @@ export const template_visitors = {
: b.id(node.index);
const item = b.id(each_node_meta.item_name);
const binding = /** @type {import('#compiler').Binding} */ (context.state.scope.get(item.name));
binding.expression = each_item_is_reactive ? b.call('$.unwrap', item) : item;
binding.expression = each_item_is_reactive ? b.call(item) : item;
/** @type {import('estree').Statement[]} */
const declarations = [];
@ -2225,7 +2225,7 @@ export const template_visitors = {
)
);
} else {
const unwrapped = binding.expression;
const unwrapped = item;
const paths = extract_paths(node.context);
for (const path of paths) {
@ -2250,7 +2250,7 @@ export const template_visitors = {
binding.expression = b.call(name);
binding.mutation = create_mutation(
/** @type {import('estree').Pattern} */ (path.update_expression(unwrapped))
/** @type {import('estree').Pattern} */ (path.update_expression(b.call(unwrapped)))
);
}
}

108
packages/svelte/src/internal/client/each.js
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@ -21,11 +21,13 @@ import { empty } from './render.js';
import {
destroy_signal,
execute_effect,
get,
lazy_property,
mutable_source,
push_destroy_fn,
render_effect,
schedule_task,
set,
set_signal_value,
source
} from './runtime.js';
@ -41,8 +43,8 @@ const LIS_BLOCK = -2;
* @param {Element | Comment} anchor_node
* @param {() => V[]} collection
* @param {number} flags
* @param {null | ((item: V) => string)} key_fn
* @param {(anchor: null, item: V, index: import('./types.js').MaybeSignal<number>) => void} render_fn
* @param {null | ((get_item: (index: number) => V) => string)} key_fn
* @param {(anchor: null, get_item: (index: number) => V, index: import('./types.js').MaybeSignal<number>) => void} render_fn
* @param {null | ((anchor: Node) => void)} fallback_fn
* @param {typeof reconcile_indexed_array | reconcile_tracked_array} reconcile_fn
* @returns {void}
@ -55,6 +57,15 @@ function each(anchor_node, collection, flags, key_fn, render_fn, fallback_fn, re
let current_fallback = null;
hydrate_block_anchor(anchor_node, is_controlled);
/** @type {import('./types.js').SourceSignal<V[]>} */
const array_source = (flags & EACH_IS_IMMUTABLE) === 0 ? mutable_source([]) : source([]);
/** @param {number} index */
const get_item = (index) => {
const array = get(array_source);
return array[index];
};
/** @type {V[]} */
let array;
@ -63,6 +74,7 @@ function each(anchor_node, collection, flags, key_fn, render_fn, fallback_fn, re
/** @type {null | import('./types.js').EffectSignal} */
let render = null;
block.r =
/** @param {import('./types.js').Transition} transition */
(transition) => {
@ -126,9 +138,12 @@ function each(anchor_node, collection, flags, key_fn, render_fn, fallback_fn, re
: maybe_array == null
? []
: Array.from(maybe_array);
if (key_fn !== null) {
keys = array.map(key_fn);
keys = array.map((item) => key_fn(() => item));
}
set(array_source, array);
const length = array.length;
if (fallback_fn !== null) {
if (length === 0) {
@ -162,7 +177,17 @@ function each(anchor_node, collection, flags, key_fn, render_fn, fallback_fn, re
const flags = block.f;
const is_controlled = (flags & EACH_IS_CONTROLLED) !== 0;
const anchor_node = block.a;
reconcile_fn(array, block, anchor_node, is_controlled, render_fn, flags, true, keys);
reconcile_fn(
get_item,
array,
block,
anchor_node,
is_controlled,
render_fn,
flags,
true,
keys
);
},
block,
true
@ -185,7 +210,7 @@ function each(anchor_node, collection, flags, key_fn, render_fn, fallback_fn, re
fallback = fallback.p;
}
// Clear the array
reconcile_fn([], block, anchor_node, is_controlled, render_fn, flags, false, keys);
reconcile_fn(get_item, [], block, anchor_node, is_controlled, render_fn, flags, false, keys);
destroy_signal(/** @type {import('./types.js').EffectSignal} */ (render));
});
@ -197,13 +222,21 @@ function each(anchor_node, collection, flags, key_fn, render_fn, fallback_fn, re
* @param {Element | Comment} anchor_node
* @param {() => V[]} collection
* @param {number} flags
* @param {null | ((item: V) => string)} key_fn
* @param {(anchor: null, item: V, index: import('./types.js').MaybeSignal<number>) => void} render_fn
* @param {null | ((get_item: (index: number) => V) => string)} key_fn
* @param {(anchor: null, get_item: (index: number) => V, index: import('./types.js').MaybeSignal<number>) => void} render_fn
* @param {null | ((anchor: Node) => void)} fallback_fn
* @returns {void}
*/
export function each_keyed(anchor_node, collection, flags, key_fn, render_fn, fallback_fn) {
each(anchor_node, collection, flags, key_fn, render_fn, fallback_fn, reconcile_tracked_array);
each(
anchor_node,
collection,
flags | EACH_INDEX_REACTIVE, // TODO is this correct? it should probably just be in the generated code
key_fn,
render_fn,
fallback_fn,
reconcile_tracked_array
);
}
/**
@ -211,7 +244,7 @@ export function each_keyed(anchor_node, collection, flags, key_fn, render_fn, fa
* @param {Element | Comment} anchor_node
* @param {() => V[]} collection
* @param {number} flags
* @param {(anchor: null, item: V, index: import('./types.js').MaybeSignal<number>) => void} render_fn
* @param {(anchor: null, get_item: (index: number) => V, index: import('./types.js').MaybeSignal<number>) => void} render_fn
* @param {null | ((anchor: Node) => void)} fallback_fn
* @returns {void}
*/
@ -221,16 +254,18 @@ export function each_indexed(anchor_node, collection, flags, render_fn, fallback
/**
* @template V
* @param {(index: number) => V} get_item
* @param {Array<V>} array
* @param {import('./types.js').EachBlock} each_block
* @param {Element | Comment | Text} dom
* @param {boolean} is_controlled
* @param {(anchor: null, item: V, index: number | import('./types.js').Signal<number>) => void} render_fn
* @param {(anchor: null, get_item: (index: number) => V, index: number | import('./types.js').Signal<number>) => void} render_fn
* @param {number} flags
* @param {boolean} apply_transitions
* @returns {void}
*/
function reconcile_indexed_array(
get_item,
array,
each_block,
dom,
@ -290,7 +325,7 @@ function reconcile_indexed_array(
hydrating_node = /** @type {Node} */ (
/** @type {Node} */ (/** @type {Node} */ (fragment.at(-1)).nextSibling).nextSibling
);
block = each_item_block(array, item, null, index, render_fn, flags);
block = each_item_block(get_item, array, item, null, index, render_fn, flags);
b_blocks[index] = block;
}
} else {
@ -298,7 +333,7 @@ function reconcile_indexed_array(
if (index >= a) {
// Add block
item = array[index];
block = each_item_block(array, item, null, index, render_fn, flags);
block = each_item_block(get_item, array, item, null, index, render_fn, flags);
b_blocks[index] = block;
insert_each_item_block(block, dom, is_controlled, null);
} else if (index >= b) {
@ -318,25 +353,27 @@ function reconcile_indexed_array(
each_block.v = b_blocks;
}
// Reconcile arrays by the equality of the elements in the array. This algorithm
// is based on Ivi's reconcilation logic:
//
// https://github.com/localvoid/ivi/blob/9f1bd0918f487da5b131941228604763c5d8ef56/packages/ivi/src/client/core.ts#L968
//
/**
* Reconcile arrays by the equality of the elements in the array. This algorithm
* is based on Ivi's reconcilation logic:
*
* https://github.com/localvoid/ivi/blob/9f1bd0918f487da5b131941228604763c5d8ef56/packages/ivi/src/client/core.ts#L968
*
* @template V
* @param {(index: number) => V} get_item
* @param {Array<V>} array
* @param {import('./types.js').EachBlock} each_block
* @param {Element | Comment | Text} dom
* @param {boolean} is_controlled
* @param {(anchor: null, item: V, index: number | import('./types.js').Signal<number>) => void} render_fn
* @param {(anchor: null, get_item: (index: number) => V, index: number | import('./types.js').Signal<number>) => void} render_fn
* @param {number} flags
* @param {boolean} apply_transitions
* @param {Array<string> | null} keys
* @returns {void}
*/
function reconcile_tracked_array(
get_item,
array,
each_block,
dom,
@ -406,7 +443,7 @@ function reconcile_tracked_array(
hydrating_node = /** @type {Node} */ (
/** @type {Node} */ ((fragment.at(-1) || hydrating_node).nextSibling).nextSibling
);
block = each_item_block(array, item, key, idx, render_fn, flags);
block = each_item_block(get_item, array, item, key, idx, render_fn, flags);
b_blocks[idx] = block;
}
} else if (a === 0) {
@ -415,12 +452,11 @@ function reconcile_tracked_array(
idx = b_end - --b;
item = array[idx];
key = is_computed_key ? keys[idx] : item;
block = each_item_block(array, item, key, idx, render_fn, flags);
block = each_item_block(get_item, array, item, key, idx, render_fn, flags);
b_blocks[idx] = block;
insert_each_item_block(block, dom, is_controlled, null);
}
} else {
var should_update_block = (flags & (EACH_ITEM_REACTIVE | EACH_INDEX_REACTIVE)) !== 0;
var start = 0;
/** @type {null | Text | Element | Comment} */
@ -433,9 +469,7 @@ function reconcile_tracked_array(
while (a_blocks[a_end].k === key) {
block = a_blocks[a_end--];
item = array[b_end];
if (should_update_block) {
update_each_item_block(block, item, b_end, flags);
}
sibling = get_first_child(block);
b_blocks[b_end] = block;
if (start > --b_end || start > a_end) {
@ -449,9 +483,7 @@ function reconcile_tracked_array(
while (start <= a_end && start <= b_end && a_blocks[start].k === key) {
item = array[start];
block = a_blocks[start];
if (should_update_block) {
update_each_item_block(block, item, start, flags);
}
b_blocks[start] = block;
++start;
key = is_computed_key ? keys[start] : array[start];
@ -463,7 +495,7 @@ function reconcile_tracked_array(
while (b_end >= start) {
item = array[b_end];
key = is_computed_key ? keys[b_end] : item;
block = each_item_block(array, item, key, b_end, render_fn, flags);
block = each_item_block(get_item, array, item, key, b_end, render_fn, flags);
b_blocks[b_end--] = block;
sibling = insert_each_item_block(block, dom, is_controlled, sibling);
}
@ -525,10 +557,10 @@ function reconcile_tracked_array(
item = array[b_end];
if (should_create) {
key = is_computed_key ? keys[b_end] : item;
block = each_item_block(array, item, key, b_end, render_fn, flags);
block = each_item_block(get_item, array, item, key, b_end, render_fn, flags);
} else {
block = b_blocks[b_end];
if (!is_animated && should_update_block) {
if (!is_animated) {
update_each_item_block(block, item, b_end, flags);
}
}
@ -726,6 +758,7 @@ function update_each_item_block(block, item, index, type) {
});
}
}
if (index_is_reactive) {
set_signal_value(/** @type {import('./types.js').Signal<number>} */ (block.i), index);
} else {
@ -764,15 +797,16 @@ export function destroy_each_item_block(
/**
* @template V
* @param {(index: number) => V} get_item
* @param {V[]} array
* @param {V} item
* @param {unknown} key
* @param {number} index
* @param {(anchor: null, item: V, index: number | import('./types.js').Signal<number>) => void} render_fn
* @param {(anchor: null, get_item: (index: number) => V, index: number | import('./types.js').Signal<number>) => void} render_fn
* @param {number} flags
* @returns {import('./types.js').EachItemBlock}
*/
function each_item_block(array, item, key, index, render_fn, flags) {
function each_item_block(get_item, array, item, key, index, render_fn, flags) {
const each_item_not_reactive = (flags & EACH_ITEM_REACTIVE) === 0;
const item_value =
@ -784,13 +818,23 @@ function each_item_block(array, item, key, index, render_fn, flags) {
? mutable_source(item)
: source(item);
const index_value = (flags & EACH_INDEX_REACTIVE) === 0 ? index : source(index);
const reactive_index = (flags & EACH_INDEX_REACTIVE) !== 0;
const index_value = reactive_index ? source(index) : index;
const block = create_each_item_block(item_value, index_value, key);
// TODO can we get rid of this closure?
const get_value = () => {
return get_item(
reactive_index
? get(/** @type {import('./types.js').SourceSignal<number>} */ (block.i))
: /** @type {number} */ (block.i)
);
};
const effect = render_effect(
/** @param {import('./types.js').EachItemBlock} block */
(block) => {
render_fn(null, block.v, block.i);
render_fn(null, get_value, block.i);
},
block,
true

2
packages/svelte/src/internal/client/validate.js
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@ -78,7 +78,7 @@ export function validate_each_keys(collection, key_fn) {
: Array.from(maybe_array);
const length = array.length;
for (let i = 0; i < length; i++) {
const key = key_fn(array[i]);
const key = key_fn(() => array[i]);
if (keys.has(key)) {
throw new Error(
`Cannot have duplicate keys in a keyed each: Keys at index ${keys.get(

4
packages/svelte/tests/runtime-legacy/samples/binding-input-checkbox-deep-contextual-b/_config.js
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@ -45,8 +45,8 @@ export default test({
`
);
inputs[2].checked = true;
await inputs[2].dispatchEvent(event);
inputs[1].checked = true;
await inputs[1].dispatchEvent(event);
await component.clear();

6
packages/svelte/tests/runtime-legacy/samples/each-block-keyed-unshift/_config.js
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@ -10,9 +10,13 @@ export default test({
<p>c</p>
`,
test({ assert, component, target }) {
async test({ assert, component, target }) {
component.titles = [{ name: 'a' }, { name: 'b' }, { name: 'c' }];
await Promise.resolve();
await Promise.resolve();
await Promise.resolve();
assert.htmlEqual(
target.innerHTML,
`

28
packages/svelte/tests/runtime-runes/samples/each-replacement/_config.js
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@ -0,0 +1,28 @@
import { test } from '../../test';
export default test({
html: `
<button>update</button>
<p>1</p>
<p>2</p>
<p>3</p>
`,
async test({ assert, target }) {
const button = target.querySelector('button');
// ensure each click runs in its own rerender task
await button?.click();
await Promise.resolve();
assert.htmlEqual(
target.innerHTML,
`
<button>update</button>
<p>4</p>
<p>5</p>
<p>6</p>
`
);
}
});

9
packages/svelte/tests/runtime-runes/samples/each-replacement/main.svelte
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@ -0,0 +1,9 @@
<script>
let numbers = $state([1, 2, 3]);
</script>
<button onclick={() => numbers = [4, 5, 6]}>update</button>
{#each numbers as n}
<p>{n}</p>
{/each}
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