Press n or j to go to the next uncovered block, b, p or k for the previous block.
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import { hydrate_next, hydrate_node, hydrating, set_hydrate_node } from './hydration.js';
import { create_text, get_first_child } from './operations.js';
import { create_fragment_from_html } from './reconciler.js';
import { active_effect } from '../runtime.js';
import { TEMPLATE_FRAGMENT, TEMPLATE_USE_IMPORT_NODE } from '../../../constants.js';
import { queue_micro_task } from './task.js';
/**
* @param {TemplateNode} start
* @param {TemplateNode | null} end
*/
export function assign_nodes(start, end) {
var effect = /** @type {Effect} */ (active_effect);
if (effect.nodes_start === null) {
effect.nodes_start = start;
effect.nodes_end = end;
}
}
/**
* @param {string} content
* @param {number} flags
* @returns {() => Node | Node[]}
*/
/*#__NO_SIDE_EFFECTS__*/
export function template(content, flags) {
var is_fragment = (flags & TEMPLATE_FRAGMENT) !== 0;
var use_import_node = (flags & TEMPLATE_USE_IMPORT_NODE) !== 0;
/** @type {Node} */
var node;
/**
* Whether or not the first item is a text/element node. If not, we need to
* create an additional comment node to act as `effect.nodes.start`
*/
var has_start = !content.startsWith('<!>');
return () => {
if (hydrating) {
assign_nodes(hydrate_node, null);
return hydrate_node;
}
if (node === undefined) {
node = create_fragment_from_html(has_start ? content : '<!>' + content);
if (!is_fragment) node = /** @type {Node} */ (get_first_child(node));
}
var clone = /** @type {TemplateNode} */ (
use_import_node ? document.importNode(node, true) : node.cloneNode(true)
);
if (is_fragment) {
var start = /** @type {TemplateNode} */ (get_first_child(clone));
var end = /** @type {TemplateNode} */ (clone.lastChild);
assign_nodes(start, end);
} else {
assign_nodes(clone, clone);
}
return clone;
};
}
/**
* @param {string} content
* @param {number} flags
* @returns {() => Node | Node[]}
*/
/*#__NO_SIDE_EFFECTS__*/
export function template_with_script(content, flags) {
var fn = template(content, flags);
return () => run_scripts(/** @type {Element | DocumentFragment} */ (fn()));
}
/**
* @param {string} content
* @param {number} flags
* @param {'svg' | 'math'} ns
* @returns {() => Node | Node[]}
*/
/*#__NO_SIDE_EFFECTS__*/
export function ns_template(content, flags, ns = 'svg') {
/**
* Whether or not the first item is a text/element node. If not, we need to
* create an additional comment node to act as `effect.nodes.start`
*/
var has_start = !content.startsWith('<!>');
var is_fragment = (flags & TEMPLATE_FRAGMENT) !== 0;
var wrapped = `<${ns}>${has_start ? content : '<!>' + content}</${ns}>`;
/** @type {Element | DocumentFragment} */
var node;
return () => {
if (hydrating) {
assign_nodes(hydrate_node, null);
return hydrate_node;
}
if (!node) {
var fragment = /** @type {DocumentFragment} */ (create_fragment_from_html(wrapped));
var root = /** @type {Element} */ (get_first_child(fragment));
if (is_fragment) {
node = document.createDocumentFragment();
while (get_first_child(root)) {
node.appendChild(/** @type {Node} */ (get_first_child(root)));
}
} else {
node = /** @type {Element} */ (get_first_child(root));
}
}
var clone = /** @type {TemplateNode} */ (node.cloneNode(true));
if (is_fragment) {
var start = /** @type {TemplateNode} */ (get_first_child(clone));
var end = /** @type {TemplateNode} */ (clone.lastChild);
assign_nodes(start, end);
} else {
assign_nodes(clone, clone);
}
return clone;
};
}
/**
* @param {string} content
* @param {number} flags
* @returns {() => Node | Node[]}
*/
/*#__NO_SIDE_EFFECTS__*/
export function svg_template_with_script(content, flags) {
var fn = ns_template(content, flags);
return () => run_scripts(/** @type {Element | DocumentFragment} */ (fn()));
}
/**
* @param {string} content
* @param {number} flags
* @returns {() => Node | Node[]}
*/
/*#__NO_SIDE_EFFECTS__*/
export function mathml_template(content, flags) {
return ns_template(content, flags, 'math');
}
/**
* Creating a document fragment from HTML that contains script tags will not execute
* the scripts. We need to replace the script tags with new ones so that they are executed.
* @param {Element | DocumentFragment} node
* @returns {Node | Node[]}
*/
function run_scripts(node) {
// scripts were SSR'd, in which case they will run
if (hydrating) return node;
const is_fragment = node.nodeType === 11;
const scripts =
/** @type {HTMLElement} */ (node).tagName === 'SCRIPT'
? [/** @type {HTMLScriptElement} */ (node)]
: node.querySelectorAll('script');
const effect = /** @type {Effect} */ (active_effect);
for (const script of scripts) {
const clone = document.createElement('script');
for (var attribute of script.attributes) {
clone.setAttribute(attribute.name, attribute.value);
}
clone.textContent = script.textContent;
// The script has changed - if it's at the edges, the effect now points at dead nodes
if (is_fragment ? node.firstChild === script : node === script) {
effect.nodes_start = clone;
}
if (is_fragment ? node.lastChild === script : node === script) {
effect.nodes_end = clone;
}
script.replaceWith(clone);
}
return node;
}
/**
* Don't mark this as side-effect-free, hydration needs to walk all nodes
* @param {any} value
*/
export function text(value = '') {
if (!hydrating) {
var t = create_text(value + '');
assign_nodes(t, t);
return t;
}
var node = hydrate_node;
if (node.nodeType !== 3) {
// if an {expression} is empty during SSR, we need to insert an empty text node
node.before((node = create_text()));
set_hydrate_node(node);
}
assign_nodes(node, node);
return node;
}
export function comment() {
// we're not delegating to `template` here for performance reasons
if (hydrating) {
assign_nodes(hydrate_node, null);
return hydrate_node;
}
var frag = document.createDocumentFragment();
var start = document.createComment('');
var anchor = create_text();
frag.append(start, anchor);
assign_nodes(start, anchor);
return frag;
}
/**
* Assign the created (or in hydration mode, traversed) dom elements to the current block
* and insert the elements into the dom (in client mode).
* @param {Text | Comment | Element} anchor
* @param {DocumentFragment | Element} dom
*/
export function append(anchor, dom) {
if (hydrating) {
/** @type {Effect} */ (active_effect).nodes_end = hydrate_node;
hydrate_next();
return;
}
if (anchor === null) {
// edge case — void `<svelte:element>` with content
return;
}
anchor.before(/** @type {Node} */ (dom));
}
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