@evocount/react-code-scanner
Version:
A react module for scanning codes like barcodes and QR codes.
142 lines • 7.72 kB
JavaScript
var __makeTemplateObject = (this && this.__makeTemplateObject) || function (cooked, raw) {
if (Object.defineProperty) { Object.defineProperty(cooked, "raw", { value: raw }); } else { cooked.raw = raw; }
return cooked;
};
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
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 __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
var __rest = (this && this.__rest) || function (s, e) {
var t = {};
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
t[p] = s[p];
if (s != null && typeof Object.getOwnPropertySymbols === "function")
for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {
if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))
t[p[i]] = s[p[i]];
}
return t;
};
import React from "react";
import { useState } from "react";
import { useEffect } from "react";
import { useRef } from "react";
import Signal from "@evocount/signal";
import styled from "styled-components";
var Wrapper = styled.div(templateObject_1 || (templateObject_1 = __makeTemplateObject(["\n\tposition: relative;\n"], ["\n\tposition: relative;\n"])));
var StyledVideo = styled.video(templateObject_2 || (templateObject_2 = __makeTemplateObject(["\n\twidth: 100%;\n"], ["\n\twidth: 100%;\n"])));
var AnimationWrapper = styled.div(templateObject_3 || (templateObject_3 = __makeTemplateObject(["\n\tposition: absolute;\n\ttop: 0;\n\tleft: 0;\n\twidth: 100%;\n\theight: 100%;\n"], ["\n\tposition: absolute;\n\ttop: 0;\n\tleft: 0;\n\twidth: 100%;\n\theight: 100%;\n"])));
export default (function (_a) {
var on_scan = _a.on_scan, on_error = _a.on_error, facing_mode = _a.facing_mode, children = _a.children, LoadingAnimation = _a.LoadingAnimation, props = __rest(_a, ["on_scan", "on_error", "facing_mode", "children", "LoadingAnimation"]);
var _b = useState(false), loaded = _b[0], set_loaded = _b[1];
var _c = useState(true), loading_animation = _c[0], set_loading_animation = _c[1];
var preview = useRef(null);
useEffect(function () {
if (preview.current === null) {
return;
}
var cancel = new Signal;
(function () { return __awaiter(void 0, void 0, void 0, function () {
var stream, Scanner, scanner, exception_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
_a.trys.push([0, 7, , 8]);
if (preview.current === null) {
return [2 /*return*/];
}
return [4 /*yield*/, navigator.mediaDevices.getUserMedia({
video: { facingMode: facing_mode || "environment" }
})];
case 1:
stream = _a.sent();
if (!!loaded) return [3 /*break*/, 3];
preview.current.srcObject = stream;
preview.current.load();
return [4 /*yield*/, preview.current.play()];
case 2:
_a.sent();
set_loaded(true);
set_loading_animation(false);
_a.label = 3;
case 3:
if (!on_scan) return [3 /*break*/, 6];
return [4 /*yield*/, import("./scanner")];
case 4:
Scanner = _a.sent();
scanner = new Scanner.default(200);
return [4 /*yield*/, scanner.scan(cancel, stream, on_scan)];
case 5:
_a.sent();
_a.label = 6;
case 6:
stream.getTracks().forEach(function (track) { return track.stop(); });
return [3 /*break*/, 8];
case 7:
exception_1 = _a.sent();
if (on_error) {
on_error(exception_1);
}
else {
console.error(exception_1);
}
return [3 /*break*/, 8];
case 8: return [2 /*return*/];
}
});
}); })();
return function () {
cancel.notify();
};
}, [preview]);
return React.createElement(Wrapper, __assign({}, props),
React.createElement(StyledVideo, { muted: true, playsInline: true, autoPlay: true, ref: preview }, children),
LoadingAnimation && loading_animation &&
React.createElement(AnimationWrapper, null,
React.createElement(LoadingAnimation, null)));
});
var templateObject_1, templateObject_2, templateObject_3;
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