144 lines
4.4 KiB
JavaScript
144 lines
4.4 KiB
JavaScript
// Copyright (c) 2018 Dominic Masters
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//
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// MIT License
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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import React from 'react';
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import LoadableImage from './LoadableImage';
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export default class Image extends React.Component {
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constructor(props) {
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super(props);
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}
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onLoad(e) {
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if(this.props.onLoad) this.props.onLoad(e);
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}
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onError() {
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if(this.props.onError) this.props.onErorr(e);
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}
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render() {
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if(this.props.loadable) {
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return <LoadableImage {...this.props} />;
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}
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let sourceProps = Object.assign({}, this.props);
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//Prop Manipulation
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if(sourceProps.image) {
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if(Array.isArray(sourceProps.image)) {
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sourceProps.sources = sourceProps.image;
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} else {
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sourceProps.src = sourceProps.image;
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}
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}
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if(sourceProps.src) {
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if(sourceProps.src.images) sourceProps.sources = sourceProps.src.images;
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if(sourceProps.src.width) sourceProps.width = sourceProps.src.width;
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if(sourceProps.src.height) sourceProps.height = sourceProps.src.height;
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}
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//Image
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let sourceElements = [];
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let sources = {};
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let defaultSrc = sourceProps.src;
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let defaultAlt = sourceProps.alt;
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let defaultWidth = sourceProps.width;
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let defaultHeight = sourceProps.height;
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if(sourceProps.sources) {
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//Iterate over supplied sources
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for(let i = 0; i < sourceProps.sources.length; i++) {
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let x = sourceProps.sources[i];
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let width = x.size || x.width;
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let isLast = (i+1) === sourceProps.sources.length;
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for(let scale = 1; scale <= 4; scale++) {
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let scaledWidth = Math.round(width / scale);
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let o = Object.assign({}, x);
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o.scale = scale;
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o.isLast = isLast;
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sources[scaledWidth] = sources[scaledWidth] || [];
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sources[scaledWidth].push(o);
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}
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}
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let keys = Object.keys(sources);
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keys.sort((l, r) => {
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return parseInt(l) - parseInt(r);
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});
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let breakNext = false;
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for(let i = 0; i < keys.length; i++) {
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if(breakNext) break;
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let k = keys[i];//The pixel size
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let ss = sources[k];//Sources at this pixel resolution
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let mediaQuery = '(max-width:'+k+'px)';
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let sss = [];
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let isNextBreak = false;
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if(this.props.maxWidth && (i+1 < keys.length)) {
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if(keys[i+1] > parseInt(this.props.maxWidth)) isNextBreak = true;
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}
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if(isNextBreak) {
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breakNext = true;
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mediaQuery = '(min-width:'+k+'px)';
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}
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if(ss.length && ss[0].isLast) {
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let prev = i > 0 ? keys[i-1] : 0;
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mediaQuery = '(min-width:'+prev+'px)';
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}
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for(let x = 0; x < ss.length; x++) {
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let scale = ss[x];
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let source = scale.src || scale.path;
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sss.push( source + (scale.scale && scale.scale!=1 ? " "+scale.scale+"x" : "") );
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}
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sourceElements.push(
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<source media={mediaQuery} srcSet={ sss.join(", ") } key={i} />
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);
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}
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}
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return (
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<picture>
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{ sourceElements }
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<img
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onLoad={ this.onLoad.bind(this) }
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onError={ this.onError.bind(this) }
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src={ defaultSrc }
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alt={ defaultAlt }
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className={ sourceProps.className }
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width={ defaultWidth }
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height={ defaultHeight }
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title={sourceProps.title}
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/>
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</picture>
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);
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}
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}
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