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svelte
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move <svelte:component> code

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pull/10767/head
Rich Harris 2 years ago
parent 278155968e
commit 8f4017a506
4 changed files with 148 additions and 136 deletions
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16
packages/svelte/src/internal/client/block.js
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@ -60,22 +60,6 @@ export function create_dynamic_element_block() {
};
}
/** @returns {import('./types.js').DynamicComponentBlock} */
export function create_dynamic_component_block() {
return {
// dom
d: null,
// effect
e: null,
// parent
p: /** @type {import('./types.js').Block} */ (current_block),
// transition
r: null,
// type
t: DYNAMIC_COMPONENT_BLOCK
};
}
/** @returns {import('./types.js').SnippetBlock} */
export function create_snippet_block() {
return {

147
packages/svelte/src/internal/client/dom/blocks/svelte-component.js
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@ -0,0 +1,147 @@
import { DYNAMIC_COMPONENT_BLOCK } from '../../constants.js';
import { hydrate_block_anchor } from '../../hydration.js';
import { destroy_effect, render_effect } from '../../reactivity/effects.js';
import { remove } from '../../reconciler.js';
import { current_block, execute_effect } from '../../runtime.js';
import { trigger_transitions } from '../../transitions.js';
/**
* @template P
* @param {Comment} anchor_node
* @param {() => (props: P) => void} component_fn
* @param {(component: (props: P) => void) => void} render_fn
* @returns {void}
*/
export function component(anchor_node, component_fn, render_fn) {
/** @type {import('#client').DynamicComponentBlock} */
const block = {
// dom
d: null,
// effect
e: null,
// parent
p: /** @type {import('#client').Block} */ (current_block),
// transition
r: null,
// type
t: DYNAMIC_COMPONENT_BLOCK
};
/** @type {null | import('#client').Render} */
let current_render = null;
hydrate_block_anchor(anchor_node);
/** @type {null | ((props: P) => void)} */
let component = null;
block.r =
/**
* @param {import('#client').Transition} transition
* @returns {void}
*/
(transition) => {
const render = /** @type {import('#client').Render} */ (current_render);
const transitions = render.s;
transitions.add(transition);
transition.f(() => {
transitions.delete(transition);
if (transitions.size === 0) {
// If the current render has changed since, then we can remove the old render
// effect as it's stale.
if (current_render !== render && render.e !== null) {
if (render.d !== null) {
remove(render.d);
render.d = null;
}
destroy_effect(render.e);
render.e = null;
}
}
});
};
const create_render_effect = () => {
/** @type {import('#client').Render} */
const render = {
d: null,
e: null,
s: new Set(),
p: current_render
};
// Managed effect
render.e = render_effect(
() => {
const current = block.d;
if (current !== null) {
remove(current);
block.d = null;
}
if (component) {
render_fn(component);
}
render.d = block.d;
block.d = null;
},
block,
true
);
current_render = render;
};
const render = () => {
const render = current_render;
if (render === null) {
create_render_effect();
return;
}
const transitions = render.s;
if (transitions.size === 0) {
if (render.d !== null) {
remove(render.d);
render.d = null;
}
if (render.e) {
execute_effect(render.e);
} else {
create_render_effect();
}
} else {
create_render_effect();
trigger_transitions(transitions, 'out');
}
};
const component_effect = render_effect(
() => {
const next_component = component_fn();
if (component !== next_component) {
component = next_component;
render();
}
},
block,
false
);
component_effect.ondestroy = () => {
let render = current_render;
while (render !== null) {
const dom = render.d;
if (dom !== null) {
remove(dom);
}
const effect = render.e;
if (effect !== null) {
destroy_effect(effect);
}
render = render.p;
}
};
block.e = component_effect;
}

120
packages/svelte/src/internal/client/render.js
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@ -14,7 +14,6 @@ import {
create_root_block,
create_dynamic_element_block,
create_head_block,
create_dynamic_component_block,
create_snippet_block
} from './block.js';
import {
@ -1676,125 +1675,6 @@ export function element(anchor_node, tag_fn, is_svg, render_fn) {
block.e = element_effect;
}
/**
* @template P
* @param {Comment} anchor_node
* @param {() => (props: P) => void} component_fn
* @param {(component: (props: P) => void) => void} render_fn
* @returns {void}
*/
export function component(anchor_node, component_fn, render_fn) {
const block = create_dynamic_component_block();
/** @type {null | import('./types.js').Render} */
let current_render = null;
hydrate_block_anchor(anchor_node);
/** @type {null | ((props: P) => void)} */
let component = null;
block.r =
/**
* @param {import('./types.js').Transition} transition
* @returns {void}
*/
(transition) => {
const render = /** @type {import('./types.js').Render} */ (current_render);
const transitions = render.s;
transitions.add(transition);
transition.f(() => {
transitions.delete(transition);
if (transitions.size === 0) {
// If the current render has changed since, then we can remove the old render
// effect as it's stale.
if (current_render !== render && render.e !== null) {
if (render.d !== null) {
remove(render.d);
render.d = null;
}
destroy_effect(render.e);
render.e = null;
}
}
});
};
const create_render_effect = () => {
/** @type {import('./types.js').Render} */
const render = {
d: null,
e: null,
s: new Set(),
p: current_render
};
// Managed effect
const effect = render_effect(
() => {
const current = block.d;
if (current !== null) {
remove(current);
block.d = null;
}
if (component) {
render_fn(component);
}
render.d = block.d;
block.d = null;
},
block,
true
);
render.e = effect;
current_render = render;
};
const render = () => {
const render = current_render;
if (render === null) {
create_render_effect();
return;
}
const transitions = render.s;
if (transitions.size === 0) {
if (render.d !== null) {
remove(render.d);
render.d = null;
}
if (render.e) {
execute_effect(render.e);
} else {
create_render_effect();
}
} else {
create_render_effect();
trigger_transitions(transitions, 'out');
}
};
const component_effect = render_effect(
() => {
const next_component = component_fn();
if (component !== next_component) {
component = next_component;
render();
}
},
block,
false
);
component_effect.ondestroy = () => {
let render = current_render;
while (render !== null) {
const dom = render.d;
if (dom !== null) {
remove(dom);
}
const effect = render.e;
if (effect !== null) {
destroy_effect(effect);
}
render = render.p;
}
};
block.e = component_effect;
}
/**
* @param {Element | Text | Comment} anchor
* @param {boolean} is_html

1
packages/svelte/src/internal/index.js
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@ -25,6 +25,7 @@ export { await_block as await } from './client/dom/blocks/await.js';
export { if_block as if } from './client/dom/blocks/if.js';
export { key_block as key } from './client/dom/blocks/key.js';
export * from './client/dom/blocks/each.js';
export * from './client/dom/blocks/svelte-component.js';
export * from './client/reactivity/deriveds.js';
export * from './client/reactivity/effects.js';
export * from './client/reactivity/sources.js';

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