mirror of https://github.com/sveltejs/svelte
Rich-Harris
7 years ago
parent
d0c0fbcef4
commit
8ccad1f107
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import { noop } from './utils.js';
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export function linear ( t ) {
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return t;
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}
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export function wrapTransition ( node, fn, params, isIntro ) {
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var obj = fn( node, params, isIntro );
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var start = window.performance.now() + ( obj.delay || 0 );
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var duration = obj.duration || 300;
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var end = start + duration;
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var ease = obj.easing || linear;
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if ( obj.tick ) {
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// JS transition
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if ( isIntro ) obj.tick( 0 );
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return {
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start: start,
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end: end,
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update: function ( now ) {
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obj.tick( ease( ( now - start ) / duration ) );
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},
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done: function () {
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obj.tick( isIntro ? 1 : 0 );
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},
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abort: noop
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};
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} else {
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// CSS transition
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var started = false;
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var inlineStyles = {};
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var computedStyles = getComputedStyle( node );
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return {
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start: start,
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end: end,
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init: function () {
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for ( var key in obj.styles ) {
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inlineStyles[ key ] = node.style[ key ];
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node.style[ key ] = isIntro ? obj.styles[ key ] : computedStyles[ key ];
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}
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},
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update: function ( now ) {
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if ( !started ) {
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var keys = Object.keys( obj.styles );
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div.style.transition = keys.map( function ( key ) {
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return key + ' ' + d;
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}).join( ', ' );
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// TODO use a keyframe animation for custom easing functions
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for ( var key in obj.styles ) {
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node.style[ key ] = isIntro ? computedStyles[ key ] : obj.styles[ key ];
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}
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started = true;
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}
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},
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done: function () {
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// TODO what if one of these styles was dynamic?
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if ( isIntro ) {
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for ( var key in obj.styles ) {
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node.style[ key ] = inlineStyles[ key ];
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}
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}
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},
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abort: function () {
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node.style.cssText = getComputedStyle( node ).cssText;
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}
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};
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}
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}
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export var transitionManager = {
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running: false,
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transitions: [],
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add: function ( transition ) {
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transitionManager.transitions.push( transition );
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if ( !this.running ) {
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this.running = true;
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this.next();
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}
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},
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remove: function ( transitions ) {
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var i = transitions.length;
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while ( i-- ) {
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var index = this.transitions.indexOf( transitions[i] );
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if ( ~index ) this.transitions.splice( index, 1 );
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}
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},
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next: function () {
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transitionManager.running = false;
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var now = window.performance.now();
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var i = transitionManager.transitions.length;
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while ( i-- ) {
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var transition = transitionManager.transitions[i];
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if ( now >= transition.end ) {
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transition.done();
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transitionManager.transitions.splice( i, 1 );
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} else {
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if ( now > transition.start ) transition.update( now );
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transitionManager.running = true;
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}
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}
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if ( transitionManager.running ) {
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requestAnimationFrame( transitionManager.next );
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}
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}
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};
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@ -0,0 +1,10 @@
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export function noop () {}
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export function assign ( target ) {
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for ( var i = 1; i < arguments.length; i += 1 ) {
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var source = arguments[i];
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for ( var k in source ) target[k] = source[k];
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}
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return target;
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}
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@ -0,0 +1,44 @@
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import deindent from './deindent.js';
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export default function toSource ( thing ) {
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if ( typeof thing === 'function' ) {
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return normaliseIndentation( thing.toString() );
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}
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if ( Array.isArray( thing ) ) {
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if ( thing.length === 0 ) return '[]';
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throw new Error( 'TODO' ); // not currently needed
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}
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if ( thing && typeof thing === 'object' ) {
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const keys = Object.keys( thing );
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if ( keys.length === 0 ) return '{}';
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const props = keys.map( key => `${key}: ${toSource( thing[ key ] )}` ).join( ',\n' );
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return deindent`
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{
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${props}
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}
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`;
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}
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return JSON.stringify( thing );
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}
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function normaliseIndentation ( str ) {
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const lines = str.split( '\n' ).slice( 1, -1 );
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let minIndentation = Infinity;
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lines.forEach( line => {
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if ( !/\S/.test( line ) ) return;
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const indentation = /^\t*/.exec( line )[0].length;
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if ( indentation < minIndentation ) minIndentation = indentation;
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});
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if ( minIndentation !== Infinity && minIndentation !== 1 ) {
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const pattern = new RegExp( `^\\t{${minIndentation - 1}}`, 'gm' );
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return str.replace( pattern, '' );
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}
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return str;
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}
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