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94 lines
2.3 KiB
94 lines
2.3 KiB
1 month ago
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'use strict'
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/*!
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* Canvas - Image
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* Copyright (c) 2010 LearnBoost <tj@learnboost.com>
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* MIT Licensed
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*/
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/**
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* Module dependencies.
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*/
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const bindings = require('./bindings')
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const Image = module.exports = bindings.Image
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const util = require('util')
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// Lazily loaded simple-get
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let get
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const { GetSource, SetSource } = bindings
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Object.defineProperty(Image.prototype, 'src', {
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/**
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* src setter. Valid values:
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* * `data:` URI
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* * Local file path
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* * HTTP or HTTPS URL
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* * Buffer containing image data (i.e. not a `data:` URI stored in a Buffer)
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*
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* @param {String|Buffer} val filename, buffer, data URI, URL
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* @api public
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*/
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set (val) {
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if (typeof val === 'string') {
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if (/^\s*data:/.test(val)) { // data: URI
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const commaI = val.indexOf(',')
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// 'base64' must come before the comma
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const isBase64 = val.lastIndexOf('base64', commaI) !== -1
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const content = val.slice(commaI + 1)
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setSource(this, Buffer.from(content, isBase64 ? 'base64' : 'utf8'), val)
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} else if (/^\s*https?:\/\//.test(val)) { // remote URL
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const onerror = err => {
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if (typeof this.onerror === 'function') {
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this.onerror(err)
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} else {
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throw err
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}
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}
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if (!get) get = require('simple-get')
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get.concat(val, (err, res, data) => {
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if (err) return onerror(err)
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if (res.statusCode < 200 || res.statusCode >= 300) {
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return onerror(new Error(`Server responded with ${res.statusCode}`))
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}
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setSource(this, data)
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})
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} else { // local file path assumed
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setSource(this, val)
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}
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} else if (Buffer.isBuffer(val)) {
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setSource(this, val)
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}
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},
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get () {
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// TODO https://github.com/Automattic/node-canvas/issues/118
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return getSource(this)
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},
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configurable: true
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})
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// TODO || is for Node.js pre-v6.6.0
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Image.prototype[util.inspect.custom || 'inspect'] = function () {
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return '[Image' +
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(this.complete ? ':' + this.width + 'x' + this.height : '') +
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(this.src ? ' ' + this.src : '') +
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(this.complete ? ' complete' : '') +
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']'
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}
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function getSource (img) {
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return img._originalSource || GetSource.call(img)
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}
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function setSource (img, src, origSrc) {
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SetSource.call(img, src)
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img._originalSource = origSrc
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}
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