mirror of
https://gitee.com/onvia/ccc-tnt-psd2ui
synced 2024-12-29 04:57:41 +00:00
97 lines
2.5 KiB
JavaScript
97 lines
2.5 KiB
JavaScript
'use strict'
|
|
|
|
/*!
|
|
* Canvas - Image
|
|
* Copyright (c) 2010 LearnBoost <tj@learnboost.com>
|
|
* MIT Licensed
|
|
*/
|
|
|
|
/**
|
|
* Module dependencies.
|
|
*/
|
|
|
|
const bindings = require('./bindings')
|
|
const Image = module.exports = bindings.Image
|
|
const util = require('util')
|
|
|
|
// Lazily loaded simple-get
|
|
let get
|
|
|
|
const { GetSource, SetSource } = bindings
|
|
|
|
Object.defineProperty(Image.prototype, 'src', {
|
|
/**
|
|
* src setter. Valid values:
|
|
* * `data:` URI
|
|
* * Local file path
|
|
* * HTTP or HTTPS URL
|
|
* * Buffer containing image data (i.e. not a `data:` URI stored in a Buffer)
|
|
*
|
|
* @param {String|Buffer} val filename, buffer, data URI, URL
|
|
* @api public
|
|
*/
|
|
set (val) {
|
|
if (typeof val === 'string') {
|
|
if (/^\s*data:/.test(val)) { // data: URI
|
|
const commaI = val.indexOf(',')
|
|
// 'base64' must come before the comma
|
|
const isBase64 = val.lastIndexOf('base64', commaI) !== -1
|
|
const content = val.slice(commaI + 1)
|
|
setSource(this, Buffer.from(content, isBase64 ? 'base64' : 'utf8'), val)
|
|
} else if (/^\s*https?:\/\//.test(val)) { // remote URL
|
|
const onerror = err => {
|
|
if (typeof this.onerror === 'function') {
|
|
this.onerror(err)
|
|
} else {
|
|
throw err
|
|
}
|
|
}
|
|
|
|
if (!get) get = require('simple-get')
|
|
|
|
get.concat({
|
|
url: val,
|
|
headers: { 'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.36' }
|
|
}, (err, res, data) => {
|
|
if (err) return onerror(err)
|
|
|
|
if (res.statusCode < 200 || res.statusCode >= 300) {
|
|
return onerror(new Error(`Server responded with ${res.statusCode}`))
|
|
}
|
|
|
|
setSource(this, data)
|
|
})
|
|
} else { // local file path assumed
|
|
setSource(this, val)
|
|
}
|
|
} else if (Buffer.isBuffer(val)) {
|
|
setSource(this, val)
|
|
}
|
|
},
|
|
|
|
get () {
|
|
// TODO https://github.com/Automattic/node-canvas/issues/118
|
|
return getSource(this)
|
|
},
|
|
|
|
configurable: true
|
|
})
|
|
|
|
// TODO || is for Node.js pre-v6.6.0
|
|
Image.prototype[util.inspect.custom || 'inspect'] = function () {
|
|
return '[Image' +
|
|
(this.complete ? ':' + this.width + 'x' + this.height : '') +
|
|
(this.src ? ' ' + this.src : '') +
|
|
(this.complete ? ' complete' : '') +
|
|
']'
|
|
}
|
|
|
|
function getSource (img) {
|
|
return img._originalSource || GetSource.call(img)
|
|
}
|
|
|
|
function setSource (img, src, origSrc) {
|
|
SetSource.call(img, src)
|
|
img._originalSource = origSrc
|
|
}
|