mirror of https://github.com/sveltejs/svelte
pushkine
5 years ago
parent
a4b86fb02d
commit
82d17c5a6f
@ -1,67 +1,63 @@
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import { element } from './dom';
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import { framerate } from 'svelte/environment';
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enum SVELTE {
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RULE = `__svelte_`,
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STYLESHEET = `__svelte_stylesheet`,
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RULESET = `__svelte_rules`,
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}
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interface ExtendedDoc extends Document {
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[SVELTE.STYLESHEET]: CSSStyleSheet;
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[SVELTE.RULESET]: Set<string>;
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}
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const active_documents = new Set<ExtendedDoc>();
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let documents_uid = 0;
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let running_animations = 0;
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function add_rule(node): [CSSStyleSheet, Set<string>] {
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const { ownerDocument } = node;
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if (!active_documents.has(ownerDocument)) {
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active_documents.add(ownerDocument);
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if (!(SVELTE.STYLESHEET in ownerDocument))
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ownerDocument[SVELTE.STYLESHEET] = ownerDocument.head.appendChild(element('style')).sheet;
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if (!(SVELTE.RULESET in ownerDocument)) ownerDocument[SVELTE.RULESET] = new Set();
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}
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return [ownerDocument[SVELTE.STYLESHEET], ownerDocument[SVELTE.RULESET]];
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}
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const document_uid = new Map();
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const document_stylesheets = new Map();
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function hash(str: string) {
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// darkskyapp/string-hash
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let hash = 5381;
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let i = str.length;
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while (i--) hash = ((hash << 5) - hash) ^ str.charCodeAt(i);
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return hash >>> 0;
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const current_rules = new Set();
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export const animate_css = Function.prototype.call.bind(function animate_css(
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this: HTMLElement,
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css: (t: number) => string,
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duration: number,
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delay = 0
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) {
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if (!document_uid.has(this.ownerDocument)) {
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document_uid.set(this.ownerDocument, documents_uid++);
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document_stylesheets.set(
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this.ownerDocument,
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this.ownerDocument.head.appendChild(this.ownerDocument.createElement('style')).sheet
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);
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}
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const gen = (step, css) => {
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let rule = '{\n';
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for (let t = 0; t < 1; t += step) rule += `${100 * t}%{${css(t)}}\n`;
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for (let t = 0, step = framerate / duration; t < 1; t += step) rule += `${100 * t}%{${css(t)}}\n`;
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rule += `100% {${css(1)}}\n}`;
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const name = SVELTE.RULE + hash(rule);
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return [name, `@keyframes ${name} ${rule}`];
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};
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function animate(this: HTMLElement, css: (t: number) => string, duration: number, delay = 0) {
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const [name, rule] = gen(Math.max(1 / 1000, framerate / duration), css);
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const [stylesheet, rules] = add_rule(this);
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if (!rules.has(name)) {
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rules.add(name);
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stylesheet.insertRule(rule, stylesheet.cssRules.length);
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// darkskyapp/string-hash
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let i = rule.length,
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hash = 5381;
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while (i--) hash = ((hash << 5) - hash) ^ rule.charCodeAt(i);
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const name = '_' + (hash >>> 0) + document_uid.get(this.ownerDocument);
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if (!current_rules.has(name)) {
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current_rules.add(name);
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const stylesheet = document_stylesheets.get(this.ownerDocument);
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stylesheet.insertRule(`@keyframes ${name} ${rule}`, stylesheet.cssRules.length);
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}
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const previous = this.style.animation;
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this.style.animation = `${
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previous ? `${previous}, ` : ''
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} ${duration}ms linear ${delay}ms 1 normal both running ${name}`;
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running_animations++;
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return () => {
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const prev = (this.style.animation || '').split(', ');
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const next = prev.filter((anim) => !anim.includes(name));
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if (prev.length !== next.length) this.style.animation = next.join(', ');
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if (--running_animations) return;
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active_documents.forEach(({ [SVELTE.STYLESHEET]: stylesheet, [SVELTE.RULESET]: ruleset }) => {
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if (--running_animations === 0) {
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document_stylesheets.forEach((stylesheet) => {
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let i = stylesheet.cssRules.length;
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while (i--) stylesheet.deleteRule(i);
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ruleset.clear();
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});
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active_documents.clear();
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};
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current_rules.clear();
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if (1 !== documents_uid) {
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document_stylesheets.clear();
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document_uid.clear();
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documents_uid = 0;
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}
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export const animate_css = Function.prototype.call.bind(animate);
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}
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};
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});
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@ -0,0 +1,4 @@
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import * as assert from 'assert';
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type TestSetup = {
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test: ({ assert: module.assert, component, mod, target, window, raf, compileOptions }) => void | Promise<void>;
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};
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