@khoohaoyit/image-size
Version:
A stream based image size extractor in Node
94 lines (93 loc) • 4.42 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __asyncValues = (this && this.__asyncValues) || function (o) {
if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
var m = o[Symbol.asyncIterator], i;
return m ? m.call(o) : (o = typeof __values === "function" ? __values(o) : o[Symbol.iterator](), i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i);
function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }
function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.SizeExtractor = void 0;
const formats_1 = require("../formats");
const streamReader_1 = require("./streamReader");
const streamParser_1 = require("./streamParser");
const setupEvent = () => {
return (c) => {
return c;
};
};
class SizeExtractor extends setupEvent()(streamReader_1.StreamReader) {
constructor(options, transformOptions) {
super(transformOptions);
this.sizes = [];
if (!options.passthrough)
this.resume();
this.on('size', (...args) => {
var _a, _b;
var _c;
this.sizes.push(args);
const [data, format] = args;
if (!this.imageSize) {
this.imageSize = {
height: data.height,
width: data.width,
type: format,
};
if (format === 'jpg' && data.orientation !== null)
this.imageSize.orientation = data.orientation;
if (format === 'icns')
this.imageSize.images = [data];
return;
}
if (this.imageSize.type !== format)
return;
if (format === 'ico')
(_a = (_c = this.imageSize).images) !== null && _a !== void 0 ? _a : (_c.images = [{ width: this.imageSize.width, height: this.imageSize.height }]);
(_b = this.imageSize.images) === null || _b === void 0 ? void 0 : _b.push(data);
});
Promise.all(formats_1.formats
.filter(([format]) => {
if (options.whitelistFormats)
return options.whitelistFormats.indexOf(format) !== -1;
if (options.blacklistFormats)
return options.blacklistFormats.indexOf(format) === -1;
return true;
})
.map(([format, handler]) => __awaiter(this, void 0, void 0, function* () {
var _a, e_1, _b, _c;
try {
try {
for (var _d = true, _e = __asyncValues(handler(new streamParser_1.StreamParser(this))), _f; _f = yield _e.next(), _a = _f.done, !_a; _d = true) {
_c = _f.value;
_d = false;
const result = _c;
this.emit('size', result, format);
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (!_d && !_a && (_b = _e.return)) yield _b.call(_e);
}
finally { if (e_1) throw e_1.error; }
}
}
catch (error) {
this.emit('parseError', error, format);
}
finally {
this.emit('parseDone', format);
}
}))).finally(() => this.emit('parseAllDone'));
}
}
exports.SizeExtractor = SizeExtractor;