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/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
// Based on @sergeche's work on the emmet plugin for atom
// TODO: Move to https://github.com/emmetio/image-size
'use strict';
Object.defineProperty(exports, "__esModule", { value: true });
const path = require("path");
const http = require("http");
const https = require("https");
const url_1 = require("url");
const sizeOf = require("image-size");
const reUrl = /^https?:/;
/**
* Get size of given image file. Supports files from local filesystem,
* as well as URLs
*/
function getImageSize(file) {
file = file.replace(/^file:\/\//, '');
return reUrl.test(file) ? getImageSizeFromURL(file) : getImageSizeFromFile(file);
}
exports.getImageSize = getImageSize;
/**
* Get image size from file on local file system
*/
function getImageSizeFromFile(file) {
return new Promise((resolve, reject) => {
const isDataUrl = file.match(/^data:.+?;base64,/);
if (isDataUrl) {
// NB should use sync version of `sizeOf()` for buffers
try {
const data = Buffer.from(file.slice(isDataUrl[0].length), 'base64');
return resolve(sizeForFileName('', sizeOf(data)));
}
catch (err) {
return reject(err);
}
}
sizeOf(file, (err, size) => {
if (err) {
reject(err);
}
else {
resolve(sizeForFileName(path.basename(file), size));
}
});
});
}
/**
* Get image size from given remove URL
*/
function getImageSizeFromURL(urlStr) {
return new Promise((resolve, reject) => {
const url = url_1.parse(urlStr);
const getTransport = url.protocol === 'https:' ? https.get : http.get;
if (!url.pathname) {
return reject('Given url doesnt have pathname property');
}
const urlPath = url.pathname;
getTransport(url, resp => {
const chunks = [];
let bufSize = 0;
const trySize = (chunks) => {
try {
const size = sizeOf(Buffer.concat(chunks, bufSize));
resp.removeListener('data', onData);
resp.destroy(); // no need to read further
resolve(sizeForFileName(path.basename(urlPath), size));
}
catch (err) {
// might not have enough data, skip error
}
};
const onData = (chunk) => {
bufSize += chunk.length;
chunks.push(chunk);
trySize(chunks);
};
resp
.on('data', onData)
.on('end', () => trySize(chunks))
.once('error', err => {
resp.removeListener('data', onData);
reject(err);
});
})
.once('error', reject);
});
}
/**
* Returns size object for given file name. If file name contains `@Nx` token,
* the final dimentions will be downscaled by N
*/
function sizeForFileName(fileName, size) {
const m = fileName.match(/@(\d+)x\./);
const scale = m ? +m[1] : 1;
return {
realWidth: size.width,
realHeight: size.height,
width: Math.floor(size.width / scale),
height: Math.floor(size.height / scale)
};
}
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