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import { namespace_svg } from '../../../../constants.js';
import {
hydrate_next,
hydrate_node,
hydrating,
set_hydrate_node,
set_hydrating
} from '../hydration.js';
import { empty } from '../operations.js';
import {
block,
branch,
destroy_effect,
pause_effect,
resume_effect
} from '../../reactivity/effects.js';
import { set_should_intro } from '../../render.js';
import { current_each_item, set_current_each_item } from './each.js';
import { current_component_context, current_effect } from '../../runtime.js';
import { DEV } from 'esm-env';
import { EFFECT_TRANSPARENT } from '../../constants.js';
import { assign_nodes } from '../template.js';
/**
* @param {Comment | Element} node
* @param {() => string} get_tag
* @param {boolean} is_svg
* @param {undefined | ((element: Element, anchor: Node | null) => void)} render_fn,
* @param {undefined | (() => string)} get_namespace
* @param {undefined | [number, number]} location
* @returns {void}
*/
export function element(node, get_tag, is_svg, render_fn, get_namespace, location) {
let was_hydrating = hydrating;
if (hydrating) {
hydrate_next();
}
var filename = DEV && location && current_component_context?.function.filename;
/** @type {string | null} */
var tag;
/** @type {string | null} */
var current_tag;
/** @type {null | Element} */
var element = null;
if (hydrating && hydrate_node.nodeType === 1) {
element = /** @type {Element} */ (hydrate_node);
hydrate_next();
}
var anchor = /** @type {TemplateNode} */ (hydrating ? hydrate_node : node);
/** @type {Effect | null} */
var effect;
/**
* The keyed `{#each ...}` item block, if any, that this element is inside.
* We track this so we can set it when changing the element, allowing any
* `animate:` directive to bind itself to the correct block
*/
var each_item_block = current_each_item;
block(() => {
const next_tag = get_tag() || null;
var ns = get_namespace ? get_namespace() : is_svg || next_tag === 'svg' ? namespace_svg : null;
// Assumption: Noone changes the namespace but not the tag (what would that even mean?)
if (next_tag === tag) return;
// See explanation of `each_item_block` above
var previous_each_item = current_each_item;
set_current_each_item(each_item_block);
if (effect) {
if (next_tag === null) {
// start outro
pause_effect(effect, () => {
effect = null;
current_tag = null;
});
} else if (next_tag === current_tag) {
// same tag as is currently rendered — abort outro
resume_effect(effect);
} else {
// tag is changing — destroy immediately, render contents without intro transitions
destroy_effect(effect);
set_should_intro(false);
}
}
if (next_tag && next_tag !== current_tag) {
effect = branch(() => {
element = hydrating
? /** @type {Element} */ (element)
: ns
? document.createElementNS(ns, next_tag)
: document.createElement(next_tag);
if (DEV && location) {
// @ts-expect-error
element.__svelte_meta = {
loc: {
file: filename,
line: location[0],
column: location[1]
}
};
}
assign_nodes(element, element);
if (render_fn) {
// If hydrating, use the existing ssr comment as the anchor so that the
// inner open and close methods can pick up the existing nodes correctly
var child_anchor = /** @type {TemplateNode} */ (
hydrating ? element.firstChild : element.appendChild(empty())
);
if (hydrating) {
if (child_anchor === null) {
set_hydrating(false);
} else {
set_hydrate_node(child_anchor);
}
}
// `child_anchor` is undefined if this is a void element, but we still
// need to call `render_fn` in order to run actions etc. If the element
// contains children, it's a user error (which is warned on elsewhere)
// and the DOM will be silently discarded
render_fn(element, child_anchor);
}
// we do this after calling `render_fn` so that child effects don't override `nodes.end`
/** @type {Effect & { nodes: EffectNodes }} */ (current_effect).nodes.end = element;
anchor.before(element);
});
}
tag = next_tag;
if (tag) current_tag = tag;
set_should_intro(true);
set_current_each_item(previous_each_item);
}, EFFECT_TRANSPARENT);
if (was_hydrating) {
set_hydrating(true);
set_hydrate_node(anchor);
}
}
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