添加对微信小程序环境的支持

src/index.js

@@ -7,9 +7,12 @@ const IScan = exportSDK(core, null, "config", "setStatusListener", "onScanListen
 
 function dispatchIScanReady() {
   _global.__IScanReady__ && _global.__IScanReady__();
+  if (!_global.dispatchEvent) {
+    return;
+  }
   if (typeof Event === "function") {
     _global.dispatchEvent(new Event("IScanReady"));
-  } else {
+  } else if (typeof document !== "undefined") {
     let event = document.createEvent("Event");
     event.initEvent("IScanReady", true, true);
     _global.dispatchEvent(event);

src/services/bridge/index.js

@@ -7,13 +7,23 @@ let _events = {};
 let _callbacks = {};
 let _bridge = "__bridge_client__";
 
+function getWindow() {
+  if (typeof window === "undefined") {
+    return null;
+  }
+  return window;
+}
+
 function getBridgeName() {
   return getConfig("bridgeName") ? getConfig("bridgeName") : _bridge;
 }
 
 function _callRuntime(func, ...options) {
   let funcs = func.split('.');
-  let instant = window;
+  let instant = getWindow();
+  if (!instant) {
+    return;
+  }
   while (funcs.length > 1) {
     instant = instant[funcs.shift()];
   }
@@ -31,9 +41,13 @@ function onCallback(name, callback) {
 }
 
 function _checkInit() {
+  const win = getWindow();
+  if (!win) {
+    return;
+  }
   let methodName = `${getBridgeName()}_handle_callback`;
-  if (!window[methodName]) {
-    window[methodName] = (res) => {
+  if (!win[methodName]) {
+    win[methodName] = (res) => {
       let { method, payload, code, request_id } = toAny(res, {});
       let data = toAny(payload, {});
       if (request_id) {
@@ -48,7 +62,9 @@ function _checkInit() {
 }
 
 export function inRuntime() {
-  return !!window[getBridgeName()]
+  const win = getWindow();
+  return !!win
+    && !!win[getBridgeName()]
     && getConfig("bridgeEnabled") !== false;
 }
 

src/services/scanner/index.js

@@ -6,6 +6,13 @@ let _scannerLastInputTime = 0;
 
 const SCANNER_INPUT_INTERVAL = 100;
 
+function getWindow() {
+    if (typeof window === "undefined") {
+        return null;
+    }
+    return window;
+}
+
 function clearScannerValue() {
     _scannerValue = "";
     _scannerLastInputTime = 0;
@@ -69,13 +76,17 @@ export function startScanner(callback){
     if (!callback || typeof callback !== "function") {
         return;
     }
+    const win = getWindow();
+    if (!win) {
+        return;
+    }
     _scannerCallback = callback;
     if (_scannerStatus === "scanning") {
         return;
     }
     _scannerStatus = "scanning";
     clearScannerValue();
-    window.addEventListener("keydown", onScannerKeydown);
+    win.addEventListener("keydown", onScannerKeydown);
 }
 
 export function stopScanner(){
@@ -85,5 +96,6 @@ export function stopScanner(){
     _scannerStatus = "ready";
     _scannerCallback = null;
     clearScannerValue();
-    window.removeEventListener("keydown", onScannerKeydown);
-}
+    const win = getWindow();
+    win && win.removeEventListener("keydown", onScannerKeydown);
+}

src/services/wx/index.js

@@ -9,10 +9,13 @@ let _wxReadyPromise = null;
 let _wxReady = false;
 
 function getWx() {
-    if (typeof window === "undefined") {
-        return null;
+    if (typeof wx !== "undefined") {
+        return wx;
     }
-    return window.wx;
+    if (typeof window !== "undefined") {
+        return window.wx;
+    }
+    return null;
 }
 
 function loadWxScript() {
@@ -78,9 +81,15 @@ export function isWxEnv() {
         && /micromessenger/i.test(navigator.userAgent || "");
 }
 
+export function isWxMiniProgramEnv() {
+    const wx = getWx();
+    return !!(wx && wx.scanCode);
+}
+
 export function isSupportWxScan() {
     const wx = getWx();
-    return isWxEnv()
+    return isWxMiniProgramEnv()
+        || isWxEnv()
         && _wxReady
         && wx
         && wx.scanQRCode;
@@ -128,7 +137,73 @@ export function initWxJssdk() {
     return _wxReadyPromise;
 }
 
+function getWxScanErrorMessage(err) {
+    if (!err) {
+        return "扫码失败";
+    }
+    let errorMsg = err.errMsg || "扫码失败";
+    if (typeof err === "object") {
+        const errorDetails = [];
+        if (err.errCode) {
+            errorDetails.push("错误代码: " + err.errCode);
+        }
+        if (err.errDesc) {
+            errorDetails.push("错误描述: " + err.errDesc);
+        }
+        try {
+            const errorStr = JSON.stringify(err, null, 2);
+            if (errorStr && errorStr !== "{}" && errorStr !== "{\"errMsg\":\"" + errorMsg + "\"}") {
+                errorDetails.push(errorStr);
+            } else {
+                errorDetails.push(errorMsg);
+            }
+        } catch (e) {
+        }
+        if (errorDetails.length) {
+            errorMsg = errorDetails.join("\n");
+        }
+    }
+    return errorMsg;
+}
+
+function startScanForWxMiniProgram(options) {
+    return new Promise(resolve => {
+        const wx = getWx();
+        if (!wx || !wx.scanCode) {
+            resolve({
+                success: false,
+                error: "微信小程序API不可用"
+            });
+            return;
+        }
+        const {
+            scanType = ["qrCode", "barCode"],
+            onlyFromCamera = false
+        } = options || {};
+        wx.scanCode({
+            onlyFromCamera,
+            scanType,
+            success: res => {
+                resolve({
+                    success: true,
+                    result: res.result,
+                    code: res.result
+                });
+            },
+            fail: err => {
+                resolve({
+                    success: false,
+                    error: getWxScanErrorMessage(err)
+                });
+            }
+        });
+    });
+}
+
 export function startScanForWx(options) {
+    if (isWxMiniProgramEnv()) {
+        return startScanForWxMiniProgram(options);
+    }
     return initWxJssdk().then(() => {
         return new Promise((resolve, reject) => {
             const {