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蓝牙打印

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components/kk-printer/empty-icon.png


+ 429 - 0
components/kk-printer/index.vue

@@ -0,0 +1,429 @@
+<template>
+	<view class="kk-printer">
+		<view class="kk-printer-btn">
+			<u-button @tap="handlePrintTap" shape="circle" :custom-style="{background:$config('primaryColor')}" type="primary">{{isPrinting?printingText:defaultText}}</u-button>
+		</view>
+		<view class="kk-shadow" :class="isShowSearch?'show':''" @tap="handleSearchClose">
+			<view class="kk-modal" @tap.stop="doNothing">
+				<view class="kk-search-device">
+					<view class="kk-filter-wrap">
+						<view class="filter-title">根据SRRI过滤设备</view>
+						<slider @change="handleSRRIChange" max='-20' min='-100' value="-95" show-value/>
+					</view>
+					<view class="kk-filter-wrap">
+						<view class="filter-title">根据蓝牙名过滤</view>
+						<input type="text"  placeholder-class="kk-placeholder-class" placeholder="请输入蓝牙名字或设备ID搜索" v-model="filterName" />
+					</view>
+					<view class="kk-btn-wrap">
+						<view class="kk-btn-item confirm-btn" @tap="searchBtnTap" v-if="!isSearching">
+							搜索设备
+						</view>
+						<view class="kk-btn-item confirm-btn" v-else>
+							搜索中...
+						</view>
+						<view class="kk-btn-item" @tap="stopSearchBtnTap">
+							停止搜索
+						</view>
+					</view>
+					<view class="kk-devices-wrap">
+						<view class="empty-wrap" v-if="filterDeviceList.length <= 0">
+							<view class="empty-icon"></view>
+							<view class="empty-text">~ 无可搜索到的设备 ~</view>
+						</view>
+						<view class="" v-else>
+							<view class="kk-devices-item" v-for="(item,index) in filterDeviceList" :key="index" @tap="handleConnectDevice(item)">
+								<view class="name">
+									<text>设备名称:</text>
+									<text>{{item.name?item.name:'未命名'}}</text>
+								</view>
+								<view class="rssi">
+									<text>信号强度:</text>
+									<text>({{Math.max(0, item.RSSI + 100)}}%)</text>
+								</view>
+								<view class="deviceid">
+									<text>设备ID:</text>
+									<text>{{item.deviceId}}</text>
+								</view>
+								<view class="advmac" v-if="item.advMac">
+									<text>advMac:</text>
+									<text>{{item.advMac}}</text>
+								</view>
+							</view>
+						</view>
+					</view>
+				</view>
+			</view>
+		</view>
+	</view>
+</template>
+
+<script>
+	import tsc from '@/components/kk-printer/printer/tsc.js'
+	import esc from '@/components/kk-printer/printer/esc.js'
+	import * as blesdk from './utils/bluetoolth';
+	import util from './utils/util.js';
+	export default {
+		data(){
+			return{
+				//是否正在打印
+				isPrinting:false,
+				//是否正在搜索设备
+				isSearching:false,
+				//是否显示蓝牙列表
+				isShowSearch:false,
+				//按蓝牙名过滤
+				filterName:'DL-',
+				//按信号过滤
+				filterRSSI:-95,
+				//设备列表
+				devicesList:[],
+				//连接的设备ID
+				deviceId:'',
+				//根据设备ID获取的服务
+				services:'',
+				//获取特征值时返回的三要素
+				serviceId: '',
+				writeId: '', 
+				readId: ''
+			}
+		},
+		props:{
+			//按钮默认文字
+			defaultText:{
+				type:String,
+				default:'快速打印'
+			},
+			//按钮打印中的文字
+			printingText:{
+				type:String,
+				default:'打印中...'
+			},
+			bufferData:{
+				type:String,
+				require:true
+			},
+			roomcode:{
+				type:String, 
+				require:true
+			},
+			CustName:{
+				type:String,
+				require:true
+			},
+			roomid:{
+				type:String,
+				require:true
+			}
+		},
+		computed:{
+			mapFilterRSSI(){
+				return (0 - this.filterRSSI)
+			},
+			filterDeviceList(){
+				let devices = this.devicesList;
+				let name = this.filterName;
+				let rssi = this.filterRSSI;
+				console.log(devices,name,rssi)
+				//按RSSI过滤
+				let filterDevices1 = devices.filter((item)=>{
+					return item.RSSI > rssi
+				})
+				console.log(filterDevices1)
+				// 按名字过滤
+				let filterDevices2
+				if(name!=''){
+					filterDevices2 = filterDevices1.filter((item)=>{
+						return (item.name.indexOf(name) >= 0 || item.deviceId.indexOf(name) >= 0)
+					})
+				}else{
+					filterDevices2 = filterDevices1
+				}
+				// 根据广播数据提取MAC地址
+				for (let i = 0; i < filterDevices2.length;i++) {  
+					if (filterDevices2[i].hasOwnProperty('advertisData')){          
+						if (filterDevices2[i].advertisData.byteLength == 8) {
+							filterDevices2[i].advMac = util.buf2hex(filterDevices2[i].advertisData.slice(2, 7));
+						}
+					} 
+				}
+				return filterDevices2
+			}
+		},
+		mounted() {
+			
+		},
+		beforeDestroy(){
+			
+			this.stopSearchBtnTap();
+		},
+		methods:{
+			doNothing(){
+				return;
+			},
+			//点击打印按钮
+			handlePrintTap(){
+				//打开蓝牙适配器
+				blesdk.openBlue().then((res)=>{
+					//获取已连接设备
+					blesdk.getConnectedBluetoothDevices().then((res)=>{
+						//若没有已连接设备,弹框搜索设备
+						console.log(res,this.deviceId,this.serviceId,this.writeId,this.bufferData,this.onPrintSuccess)
+						if(res.devices.length == 0){
+							this.isShowSearch = true
+						}else{
+							const lastDevice = this.$store.state.vuex_lastBuleDevice
+							if(lastDevice && res.devices[0].deviceId == lastDevice.deviceId){
+								this.deviceId = lastDevice.deviceId
+								this.serviceId = lastDevice.serviceId
+								this.writeId = lastDevice.writeId
+								this.readId = lastDevice.readId
+							}
+							let datalen=20;
+							if (plus.os.name != 'Android')
+							{         
+							  datalen=180;
+							}
+							this.isPrinting = true;
+							this.$nextTick(()=>{
+								var command = tsc.jpPrinter.createNew()
+								command.init()
+								command.setSize(40, 30) // 标签纸张宽高,单位mm
+								command.setGap(2) // 标签上下间距,单位mm
+								command.setCls() // 清除缓冲区数据
+								command.setText(50, 10, "TSS24.BF2", 1, 1, "打印测试")
+								command.setQR(50, 50, "L", 5, "A", "https://www.baidu.com")
+								command.setBox(5, 5, 795, 595, 1)
+								command.setPagePrint(1,2) // 打印分数1,每个标签重发打印2次
+								console.log("开始打印了")
+								blesdk.senBlData(this.deviceId, this.serviceId, this.writeId, command.getData(), this.onPrintSuccess);
+								this.isPrinting = false;
+							})
+						}
+					}).catch((err)=>{
+						blesdk.catchToast(err);
+					})
+				}).catch((err)=>{
+					blesdk.catchToast(err);
+				})
+			},
+			onGetDevice(res){
+				this.devicesList = res;
+			},
+			handleSearchClose(){
+				this.isShowSearch = false
+			},
+			handleSRRIChange(e){
+				this.filterRSSI = e.detail.value
+			},
+			//开始搜索设备
+			searchBtnTap(){
+				blesdk.startBluetoothDevicesDiscovery();
+				this.isSearching = true;
+				blesdk.onfindBlueDevices(this.onGetDevice)
+			},
+			//停止搜索设备
+			stopSearchBtnTap(){
+				blesdk.stopBlueDevicesDiscovery();
+				this.isSearching = false;
+			},
+			//点击连接设备
+			handleConnectDevice(device){
+				let deviceId = device.deviceId;
+				let name = device.name;
+				this.deviceId = deviceId;
+				console.log('deviceId',this.deviceId)
+				// uni.setStorageSync('k_curDeviceID',deviceId);
+				// uni.setStorageSync('k_curDeviceName',name);plus.bluetooth.onBluetoothDeviceFound
+				uni.onBLEConnectionStateChange(function(res){
+					console.log('连接',res)
+					if(res.connected){
+						plus.nativeUI.toast('设备'+ res.deviceId + '已连接',{
+							verticalAlign:'center'
+						})
+					}else{
+						plus.nativeUI.toast('设备'+ res.deviceId + '已断开连接',{
+							verticalAlign:'center'
+						})
+					}
+			    })
+				blesdk.createBLEConnection(deviceId, this.onConnectSuccess, this.onConnectFail);
+			},
+			onConnectSuccess(res){
+				this.stopSearchBtnTap()
+				blesdk.getBLEDeviceServices(this.deviceId, this.onGetServicesSuccess, this.onGetServicesFail);
+			},
+			onConnectFail(err){
+				console.log('链接失败',err)
+			},
+			onGetServicesSuccess(res){
+				console.log('获取服务',res)
+				this.services = res.serviceId;
+				blesdk.getDeviceCharacteristics(this.deviceId, this.services, this.onGetCharacterSuccess, this.onGetCharacterFail);
+			},
+			onGetServicesFail(err){
+				console.log('获取服务失败')
+			},
+			onGetCharacterSuccess(res){
+				console.log('获取特征值成功',res)
+				this.serviceId = res.serviceId;
+				this.writeId = res.writeId;
+				this.readId = res.readId;
+				this.isShowSearch = false;
+				this.$store.state.vuex_lastBuleDevice = {deviceId:this.deviceId,serviceId:this.serviceId,writeId:this.writeId,readId:this.readId}
+			},
+			onGetCharacterFail(err){
+				console.log('特征值获取失败')
+			},
+			onPrintSuccess(){
+				this.isPrinting = false;
+				console.log({roomcode:this.roomcode,CustName:this.CustName,id:this.roomid})
+				console.log('打印成功')
+				// this.$emit('onPrintSuccess')
+			},
+			onPrintFail(){
+				console.log('打印失败')
+				this.isPrinting = false;
+			},
+			closeConnect(){
+				blesdk.closeBLEConnection()
+			}
+		}
+	}
+</script>
+
+<style lang="scss" scoped>
+	.kk-printer{
+		&-btn{
+			width:100%;
+			height:100%;
+		}
+		.kk-shadow{
+			display: none;
+			&.show{
+				display: block;
+				width:100vw;
+				height:100vh;
+				background: rgba(0,0,0,0.4);
+				position: fixed;
+				top: 0;
+				left: 0;
+				display: flex;
+				justify-content: center;
+				align-items: center;
+				z-index: 10000;
+				.kk-modal{
+					width:680upx;
+					height: 80%;
+					padding:24upx;
+					box-sizing: border-box;
+					overflow-y: auto;
+					border-radius: 20upx;
+					background: #ffffff;
+					display: flex;
+					justify-content: center;
+					align-items: center;
+					.kk-search-device{
+						width:100%;
+						height: 100%;
+						.kk-filter-wrap{
+							width:100%;
+							height: 160upx;
+							display: flex;
+							flex-direction: column;
+							justify-content: flex-start;
+							align-items: flex-start;
+							.filter-title{
+								line-height: 70upx;
+								font-size: 30upx;
+								color: #999999;
+							}
+							&>slider{
+								width:90%;
+								height: 90upx;
+							}
+							&>input{
+								padding:0 20upx;
+								box-sizing: border-box;
+								border-radius: 10upx;
+								height: 90upx;
+								width:100%;
+								border: 1upx solid #ebebeb;
+							}
+						}
+						.kk-btn-wrap{
+							width:100%;
+							height: 140upx;
+							display: flex;
+							justify-content: space-between;
+							align-items: center;
+							&>view{
+								flex:1 1 auto;
+								height: 100upx;
+								line-height: 100upx;
+								border-radius: 16upx;
+								text-align: center;
+								color:#ffffff;
+								&.confirm-btn{
+									background: #007AFF;
+									margin-right:30upx;
+								}
+								&:nth-last-child(1){
+									background: #DD524D;
+								}
+							}
+						}
+						.kk-devices-wrap{
+							height: calc(100% - 460upx);
+							overflow-y:auto;
+							padding:10upx 20upx;
+							box-sizing: border-box;
+							border: 1upx solid #ebebeb;
+							box-sizing: border-box;
+							border-radius: 20upx;
+							.empty-wrap{
+								width:100%;
+								height: 100%;
+								display: flex;
+								flex-direction: column;
+								justify-content: center;
+								align-items: center;
+								.empty-icon{
+									width:268upx;
+									height: 240upx;
+									background: url('./empty-icon.png') no-repeat;
+									background-size:100% 100%;
+									margin-bottom: 26upx;
+								}
+								.empty-text{
+									width: 100%;
+									line-height: 50upx;
+									font-size: 30upx;
+									text-align: center;
+									color: #999999;
+								}
+							}
+							.kk-devices-item{
+								width:100%;
+								border-bottom: 1upx solid #ebebeb;
+								padding:10upx 0;
+								box-sizing: border-box;
+								&:nth-last-child(1){
+									border-bottom: none;
+								}
+								&>view{
+									width:100%;
+									font-size: 30upx;
+								}
+							}
+						}
+					}
+				}
+			}
+			
+		}
+	}
+	.kk-placeholder-class{
+		font-size: 30upx;
+		color:#999999;
+	}
+</style>

Những thai đổi đã bị hủy bỏ vì nó quá lớn
+ 9 - 0
components/kk-printer/printer/encoding-indexes.js


+ 3312 - 0
components/kk-printer/printer/encoding.js

@@ -0,0 +1,3312 @@
+// This is free and unencumbered software released into the public domain.
+// See LICENSE.md for more information.
+
+/**
+ * @fileoverview Global |this| required for resolving indexes in node.
+ * @suppress {globalThis}
+ */
+(function(global) {
+  'use strict';
+
+  // If we're in node require encoding-indexes and attach it to the global.
+  if (typeof module !== "undefined" && module.exports &&
+    !global["encoding-indexes"]) {
+    global["encoding-indexes"] =
+      require("./encoding-indexes.js")["encoding-indexes"];
+  }
+
+  //
+  // Utilities
+  //
+
+  /**
+   * @param {number} a The number to test.
+   * @param {number} min The minimum value in the range, inclusive.
+   * @param {number} max The maximum value in the range, inclusive.
+   * @return {boolean} True if a >= min and a <= max.
+   */
+  function inRange(a, min, max) {
+    return min <= a && a <= max;
+  }
+
+  /**
+   * @param {!Array.<*>} array The array to check.
+   * @param {*} item The item to look for in the array.
+   * @return {boolean} True if the item appears in the array.
+   */
+  function includes(array, item) {
+    return array.indexOf(item) !== -1;
+  }
+
+  var floor = Math.floor;
+
+  /**
+   * @param {*} o
+   * @return {Object}
+   */
+  function ToDictionary(o) {
+    if (o === undefined) return {};
+    if (o === Object(o)) return o;
+    throw TypeError('Could not convert argument to dictionary');
+  }
+
+  /**
+   * @param {string} string Input string of UTF-16 code units.
+   * @return {!Array.<number>} Code points.
+   */
+  function stringToCodePoints(string) {
+    // https://heycam.github.io/webidl/#dfn-obtain-unicode
+
+    // 1. Let S be the DOMString value.
+    var s = String(string);
+
+    // 2. Let n be the length of S.
+    var n = s.length;
+
+    // 3. Initialize i to 0.
+    var i = 0;
+
+    // 4. Initialize U to be an empty sequence of Unicode characters.
+    var u = [];
+
+    // 5. While i < n:
+    while (i < n) {
+
+      // 1. Let c be the code unit in S at index i.
+      var c = s.charCodeAt(i);
+
+      // 2. Depending on the value of c:
+
+      // c < 0xD800 or c > 0xDFFF
+      if (c < 0xD800 || c > 0xDFFF) {
+        // Append to U the Unicode character with code point c.
+        u.push(c);
+      }
+
+      // 0xDC00 ≤ c ≤ 0xDFFF
+      else if (0xDC00 <= c && c <= 0xDFFF) {
+        // Append to U a U+FFFD REPLACEMENT CHARACTER.
+        u.push(0xFFFD);
+      }
+
+      // 0xD800 ≤ c ≤ 0xDBFF
+      else if (0xD800 <= c && c <= 0xDBFF) {
+        // 1. If i = n−1, then append to U a U+FFFD REPLACEMENT
+        // CHARACTER.
+        if (i === n - 1) {
+          u.push(0xFFFD);
+        }
+        // 2. Otherwise, i < n−1:
+        else {
+          // 1. Let d be the code unit in S at index i+1.
+          var d = s.charCodeAt(i + 1);
+
+          // 2. If 0xDC00 ≤ d ≤ 0xDFFF, then:
+          if (0xDC00 <= d && d <= 0xDFFF) {
+            // 1. Let a be c & 0x3FF.
+            var a = c & 0x3FF;
+
+            // 2. Let b be d & 0x3FF.
+            var b = d & 0x3FF;
+
+            // 3. Append to U the Unicode character with code point
+            // 2^16+2^10*a+b.
+            u.push(0x10000 + (a << 10) + b);
+
+            // 4. Set i to i+1.
+            i += 1;
+          }
+
+          // 3. Otherwise, d < 0xDC00 or d > 0xDFFF. Append to U a
+          // U+FFFD REPLACEMENT CHARACTER.
+          else  {
+            u.push(0xFFFD);
+          }
+        }
+      }
+
+      // 3. Set i to i+1.
+      i += 1;
+    }
+
+    // 6. Return U.
+    return u;
+  }
+
+  /**
+   * @param {!Array.<number>} code_points Array of code points.
+   * @return {string} string String of UTF-16 code units.
+   */
+  function codePointsToString(code_points) {
+    var s = '';
+    for (var i = 0; i < code_points.length; ++i) {
+      var cp = code_points[i];
+      if (cp <= 0xFFFF) {
+        s += String.fromCharCode(cp);
+      } else {
+        cp -= 0x10000;
+        s += String.fromCharCode((cp >> 10) + 0xD800,
+                                 (cp & 0x3FF) + 0xDC00);
+      }
+    }
+    return s;
+  }
+
+
+  //
+  // Implementation of Encoding specification
+  // https://encoding.spec.whatwg.org/
+  //
+
+  //
+  // 4. Terminology
+  //
+
+  /**
+   * An ASCII byte is a byte in the range 0x00 to 0x7F, inclusive.
+   * @param {number} a The number to test.
+   * @return {boolean} True if a is in the range 0x00 to 0x7F, inclusive.
+   */
+  function isASCIIByte(a) {
+    return 0x00 <= a && a <= 0x7F;
+  }
+
+  /**
+   * An ASCII code point is a code point in the range U+0000 to
+   * U+007F, inclusive.
+   */
+  var isASCIICodePoint = isASCIIByte;
+
+
+  /**
+   * End-of-stream is a special token that signifies no more tokens
+   * are in the stream.
+   * @const
+   */ var end_of_stream = -1;
+
+  /**
+   * A stream represents an ordered sequence of tokens.
+   *
+   * @constructor
+   * @param {!(Array.<number>|Uint8Array)} tokens Array of tokens that provide
+   * the stream.
+   */
+  function Stream(tokens) {
+    /** @type {!Array.<number>} */
+    this.tokens = [].slice.call(tokens);
+    // Reversed as push/pop is more efficient than shift/unshift.
+    this.tokens.reverse();
+  }
+
+  Stream.prototype = {
+    /**
+     * @return {boolean} True if end-of-stream has been hit.
+     */
+    endOfStream: function() {
+      return !this.tokens.length;
+    },
+
+    /**
+     * When a token is read from a stream, the first token in the
+     * stream must be returned and subsequently removed, and
+     * end-of-stream must be returned otherwise.
+     *
+     * @return {number} Get the next token from the stream, or
+     * end_of_stream.
+     */
+     read: function() {
+      if (!this.tokens.length)
+        return end_of_stream;
+       return this.tokens.pop();
+     },
+
+    /**
+     * When one or more tokens are prepended to a stream, those tokens
+     * must be inserted, in given order, before the first token in the
+     * stream.
+     *
+     * @param {(number|!Array.<number>)} token The token(s) to prepend to the
+     * stream.
+     */
+    prepend: function(token) {
+      if (Array.isArray(token)) {
+        var tokens = /**@type {!Array.<number>}*/(token);
+        while (tokens.length)
+          this.tokens.push(tokens.pop());
+      } else {
+        this.tokens.push(token);
+      }
+    },
+
+    /**
+     * When one or more tokens are pushed to a stream, those tokens
+     * must be inserted, in given order, after the last token in the
+     * stream.
+     *
+     * @param {(number|!Array.<number>)} token The tokens(s) to push to the
+     * stream.
+     */
+    push: function(token) {
+      if (Array.isArray(token)) {
+        var tokens = /**@type {!Array.<number>}*/(token);
+        while (tokens.length)
+          this.tokens.unshift(tokens.shift());
+      } else {
+        this.tokens.unshift(token);
+      }
+    }
+  };
+
+  //
+  // 5. Encodings
+  //
+
+  // 5.1 Encoders and decoders
+
+  /** @const */
+  var finished = -1;
+
+  /**
+   * @param {boolean} fatal If true, decoding errors raise an exception.
+   * @param {number=} opt_code_point Override the standard fallback code point.
+   * @return {number} The code point to insert on a decoding error.
+   */
+  function decoderError(fatal, opt_code_point) {
+    if (fatal)
+      throw TypeError('Decoder error');
+    return opt_code_point || 0xFFFD;
+  }
+
+  /**
+   * @param {number} code_point The code point that could not be encoded.
+   * @return {number} Always throws, no value is actually returned.
+   */
+  function encoderError(code_point) {
+    throw TypeError('The code point ' + code_point + ' could not be encoded.');
+  }
+
+  /** @interface */
+  function Decoder() {}
+  Decoder.prototype = {
+    /**
+     * @param {Stream} stream The stream of bytes being decoded.
+     * @param {number} bite The next byte read from the stream.
+     * @return {?(number|!Array.<number>)} The next code point(s)
+     *     decoded, or null if not enough data exists in the input
+     *     stream to decode a complete code point, or |finished|.
+     */
+    handler: function(stream, bite) {}
+  };
+
+  /** @interface */
+  function Encoder() {}
+  Encoder.prototype = {
+    /**
+     * @param {Stream} stream The stream of code points being encoded.
+     * @param {number} code_point Next code point read from the stream.
+     * @return {(number|!Array.<number>)} Byte(s) to emit, or |finished|.
+     */
+    handler: function(stream, code_point) {}
+  };
+
+  // 5.2 Names and labels
+
+  // TODO: Define @typedef for Encoding: {name:string,labels:Array.<string>}
+  // https://github.com/google/closure-compiler/issues/247
+
+  /**
+   * @param {string} label The encoding label.
+   * @return {?{name:string,labels:Array.<string>}}
+   */
+  function getEncoding(label) {
+    // 1. Remove any leading and trailing ASCII whitespace from label.
+    label = String(label).trim().toLowerCase();
+
+    // 2. If label is an ASCII case-insensitive match for any of the
+    // labels listed in the table below, return the corresponding
+    // encoding, and failure otherwise.
+    if (Object.prototype.hasOwnProperty.call(label_to_encoding, label)) {
+      return label_to_encoding[label];
+    }
+    return null;
+  }
+
+  /**
+   * Encodings table: https://encoding.spec.whatwg.org/encodings.json
+   * @const
+   * @type {!Array.<{
+   *          heading: string,
+   *          encodings: Array.<{name:string,labels:Array.<string>}>
+   *        }>}
+   */
+  var encodings = [
+    {
+      "encodings": [
+        {
+          "labels": [
+            "unicode-1-1-utf-8",
+            "utf-8",
+            "utf8"
+          ],
+          "name": "UTF-8"
+        }
+      ],
+      "heading": "The Encoding"
+    },
+    {
+      "encodings": [
+        {
+          "labels": [
+            "866",
+            "cp866",
+            "csibm866",
+            "ibm866"
+          ],
+          "name": "IBM866"
+        },
+        {
+          "labels": [
+            "csisolatin2",
+            "iso-8859-2",
+            "iso-ir-101",
+            "iso8859-2",
+            "iso88592",
+            "iso_8859-2",
+            "iso_8859-2:1987",
+            "l2",
+            "latin2"
+          ],
+          "name": "ISO-8859-2"
+        },
+        {
+          "labels": [
+            "csisolatin3",
+            "iso-8859-3",
+            "iso-ir-109",
+            "iso8859-3",
+            "iso88593",
+            "iso_8859-3",
+            "iso_8859-3:1988",
+            "l3",
+            "latin3"
+          ],
+          "name": "ISO-8859-3"
+        },
+        {
+          "labels": [
+            "csisolatin4",
+            "iso-8859-4",
+            "iso-ir-110",
+            "iso8859-4",
+            "iso88594",
+            "iso_8859-4",
+            "iso_8859-4:1988",
+            "l4",
+            "latin4"
+          ],
+          "name": "ISO-8859-4"
+        },
+        {
+          "labels": [
+            "csisolatincyrillic",
+            "cyrillic",
+            "iso-8859-5",
+            "iso-ir-144",
+            "iso8859-5",
+            "iso88595",
+            "iso_8859-5",
+            "iso_8859-5:1988"
+          ],
+          "name": "ISO-8859-5"
+        },
+        {
+          "labels": [
+            "arabic",
+            "asmo-708",
+            "csiso88596e",
+            "csiso88596i",
+            "csisolatinarabic",
+            "ecma-114",
+            "iso-8859-6",
+            "iso-8859-6-e",
+            "iso-8859-6-i",
+            "iso-ir-127",
+            "iso8859-6",
+            "iso88596",
+            "iso_8859-6",
+            "iso_8859-6:1987"
+          ],
+          "name": "ISO-8859-6"
+        },
+        {
+          "labels": [
+            "csisolatingreek",
+            "ecma-118",
+            "elot_928",
+            "greek",
+            "greek8",
+            "iso-8859-7",
+            "iso-ir-126",
+            "iso8859-7",
+            "iso88597",
+            "iso_8859-7",
+            "iso_8859-7:1987",
+            "sun_eu_greek"
+          ],
+          "name": "ISO-8859-7"
+        },
+        {
+          "labels": [
+            "csiso88598e",
+            "csisolatinhebrew",
+            "hebrew",
+            "iso-8859-8",
+            "iso-8859-8-e",
+            "iso-ir-138",
+            "iso8859-8",
+            "iso88598",
+            "iso_8859-8",
+            "iso_8859-8:1988",
+            "visual"
+          ],
+          "name": "ISO-8859-8"
+        },
+        {
+          "labels": [
+            "csiso88598i",
+            "iso-8859-8-i",
+            "logical"
+          ],
+          "name": "ISO-8859-8-I"
+        },
+        {
+          "labels": [
+            "csisolatin6",
+            "iso-8859-10",
+            "iso-ir-157",
+            "iso8859-10",
+            "iso885910",
+            "l6",
+            "latin6"
+          ],
+          "name": "ISO-8859-10"
+        },
+        {
+          "labels": [
+            "iso-8859-13",
+            "iso8859-13",
+            "iso885913"
+          ],
+          "name": "ISO-8859-13"
+        },
+        {
+          "labels": [
+            "iso-8859-14",
+            "iso8859-14",
+            "iso885914"
+          ],
+          "name": "ISO-8859-14"
+        },
+        {
+          "labels": [
+            "csisolatin9",
+            "iso-8859-15",
+            "iso8859-15",
+            "iso885915",
+            "iso_8859-15",
+            "l9"
+          ],
+          "name": "ISO-8859-15"
+        },
+        {
+          "labels": [
+            "iso-8859-16"
+          ],
+          "name": "ISO-8859-16"
+        },
+        {
+          "labels": [
+            "cskoi8r",
+            "koi",
+            "koi8",
+            "koi8-r",
+            "koi8_r"
+          ],
+          "name": "KOI8-R"
+        },
+        {
+          "labels": [
+            "koi8-ru",
+            "koi8-u"
+          ],
+          "name": "KOI8-U"
+        },
+        {
+          "labels": [
+            "csmacintosh",
+            "mac",
+            "macintosh",
+            "x-mac-roman"
+          ],
+          "name": "macintosh"
+        },
+        {
+          "labels": [
+            "dos-874",
+            "iso-8859-11",
+            "iso8859-11",
+            "iso885911",
+            "tis-620",
+            "windows-874"
+          ],
+          "name": "windows-874"
+        },
+        {
+          "labels": [
+            "cp1250",
+            "windows-1250",
+            "x-cp1250"
+          ],
+          "name": "windows-1250"
+        },
+        {
+          "labels": [
+            "cp1251",
+            "windows-1251",
+            "x-cp1251"
+          ],
+          "name": "windows-1251"
+        },
+        {
+          "labels": [
+            "ansi_x3.4-1968",
+            "ascii",
+            "cp1252",
+            "cp819",
+            "csisolatin1",
+            "ibm819",
+            "iso-8859-1",
+            "iso-ir-100",
+            "iso8859-1",
+            "iso88591",
+            "iso_8859-1",
+            "iso_8859-1:1987",
+            "l1",
+            "latin1",
+            "us-ascii",
+            "windows-1252",
+            "x-cp1252"
+          ],
+          "name": "windows-1252"
+        },
+        {
+          "labels": [
+            "cp1253",
+            "windows-1253",
+            "x-cp1253"
+          ],
+          "name": "windows-1253"
+        },
+        {
+          "labels": [
+            "cp1254",
+            "csisolatin5",
+            "iso-8859-9",
+            "iso-ir-148",
+            "iso8859-9",
+            "iso88599",
+            "iso_8859-9",
+            "iso_8859-9:1989",
+            "l5",
+            "latin5",
+            "windows-1254",
+            "x-cp1254"
+          ],
+          "name": "windows-1254"
+        },
+        {
+          "labels": [
+            "cp1255",
+            "windows-1255",
+            "x-cp1255"
+          ],
+          "name": "windows-1255"
+        },
+        {
+          "labels": [
+            "cp1256",
+            "windows-1256",
+            "x-cp1256"
+          ],
+          "name": "windows-1256"
+        },
+        {
+          "labels": [
+            "cp1257",
+            "windows-1257",
+            "x-cp1257"
+          ],
+          "name": "windows-1257"
+        },
+        {
+          "labels": [
+            "cp1258",
+            "windows-1258",
+            "x-cp1258"
+          ],
+          "name": "windows-1258"
+        },
+        {
+          "labels": [
+            "x-mac-cyrillic",
+            "x-mac-ukrainian"
+          ],
+          "name": "x-mac-cyrillic"
+        }
+      ],
+      "heading": "Legacy single-byte encodings"
+    },
+    {
+      "encodings": [
+        {
+          "labels": [
+            "chinese",
+            "csgb2312",
+            "csiso58gb231280",
+            "gb2312",
+            "gb_2312",
+            "gb_2312-80",
+            "gbk",
+            "iso-ir-58",
+            "x-gbk"
+          ],
+          "name": "GBK"
+        },
+        {
+          "labels": [
+            "gb18030"
+          ],
+          "name": "gb18030"
+        }
+      ],
+      "heading": "Legacy multi-byte Chinese (simplified) encodings"
+    },
+    {
+      "encodings": [
+        {
+          "labels": [
+            "big5",
+            "big5-hkscs",
+            "cn-big5",
+            "csbig5",
+            "x-x-big5"
+          ],
+          "name": "Big5"
+        }
+      ],
+      "heading": "Legacy multi-byte Chinese (traditional) encodings"
+    },
+    {
+      "encodings": [
+        {
+          "labels": [
+            "cseucpkdfmtjapanese",
+            "euc-jp",
+            "x-euc-jp"
+          ],
+          "name": "EUC-JP"
+        },
+        {
+          "labels": [
+            "csiso2022jp",
+            "iso-2022-jp"
+          ],
+          "name": "ISO-2022-JP"
+        },
+        {
+          "labels": [
+            "csshiftjis",
+            "ms932",
+            "ms_kanji",
+            "shift-jis",
+            "shift_jis",
+            "sjis",
+            "windows-31j",
+            "x-sjis"
+          ],
+          "name": "Shift_JIS"
+        }
+      ],
+      "heading": "Legacy multi-byte Japanese encodings"
+    },
+    {
+      "encodings": [
+        {
+          "labels": [
+            "cseuckr",
+            "csksc56011987",
+            "euc-kr",
+            "iso-ir-149",
+            "korean",
+            "ks_c_5601-1987",
+            "ks_c_5601-1989",
+            "ksc5601",
+            "ksc_5601",
+            "windows-949"
+          ],
+          "name": "EUC-KR"
+        }
+      ],
+      "heading": "Legacy multi-byte Korean encodings"
+    },
+    {
+      "encodings": [
+        {
+          "labels": [
+            "csiso2022kr",
+            "hz-gb-2312",
+            "iso-2022-cn",
+            "iso-2022-cn-ext",
+            "iso-2022-kr"
+          ],
+          "name": "replacement"
+        },
+        {
+          "labels": [
+            "utf-16be"
+          ],
+          "name": "UTF-16BE"
+        },
+        {
+          "labels": [
+            "utf-16",
+            "utf-16le"
+          ],
+          "name": "UTF-16LE"
+        },
+        {
+          "labels": [
+            "x-user-defined"
+          ],
+          "name": "x-user-defined"
+        }
+      ],
+      "heading": "Legacy miscellaneous encodings"
+    }
+  ];
+
+  // Label to encoding registry.
+  /** @type {Object.<string,{name:string,labels:Array.<string>}>} */
+  var label_to_encoding = {};
+  encodings.forEach(function(category) {
+    category.encodings.forEach(function(encoding) {
+      encoding.labels.forEach(function(label) {
+        label_to_encoding[label] = encoding;
+      });
+    });
+  });
+
+  // Registry of of encoder/decoder factories, by encoding name.
+  /** @type {Object.<string, function({fatal:boolean}): Encoder>} */
+  var encoders = {};
+  /** @type {Object.<string, function({fatal:boolean}): Decoder>} */
+  var decoders = {};
+
+  //
+  // 6. Indexes
+  //
+
+  /**
+   * @param {number} pointer The |pointer| to search for.
+   * @param {(!Array.<?number>|undefined)} index The |index| to search within.
+   * @return {?number} The code point corresponding to |pointer| in |index|,
+   *     or null if |code point| is not in |index|.
+   */
+  function indexCodePointFor(pointer, index) {
+    if (!index) return null;
+    return index[pointer] || null;
+  }
+
+  /**
+   * @param {number} code_point The |code point| to search for.
+   * @param {!Array.<?number>} index The |index| to search within.
+   * @return {?number} The first pointer corresponding to |code point| in
+   *     |index|, or null if |code point| is not in |index|.
+   */
+  function indexPointerFor(code_point, index) {
+    var pointer = index.indexOf(code_point);
+    return pointer === -1 ? null : pointer;
+  }
+
+  /**
+   * @param {string} name Name of the index.
+   * @return {(!Array.<number>|!Array.<Array.<number>>)}
+   *  */
+  function index(name) {
+    if (!('encoding-indexes' in global)) {
+      throw Error("Indexes missing." +
+                  " Did you forget to include encoding-indexes.js first?");
+    }
+    return global['encoding-indexes'][name];
+  }
+
+  /**
+   * @param {number} pointer The |pointer| to search for in the gb18030 index.
+   * @return {?number} The code point corresponding to |pointer| in |index|,
+   *     or null if |code point| is not in the gb18030 index.
+   */
+  function indexGB18030RangesCodePointFor(pointer) {
+    // 1. If pointer is greater than 39419 and less than 189000, or
+    // pointer is greater than 1237575, return null.
+    if ((pointer > 39419 && pointer < 189000) || (pointer > 1237575))
+      return null;
+
+    // 2. If pointer is 7457, return code point U+E7C7.
+    if (pointer === 7457) return 0xE7C7;
+
+    // 3. Let offset be the last pointer in index gb18030 ranges that
+    // is equal to or less than pointer and let code point offset be
+    // its corresponding code point.
+    var offset = 0;
+    var code_point_offset = 0;
+    var idx = index('gb18030-ranges');
+    var i;
+    for (i = 0; i < idx.length; ++i) {
+      /** @type {!Array.<number>} */
+      var entry = idx[i];
+      if (entry[0] <= pointer) {
+        offset = entry[0];
+        code_point_offset = entry[1];
+      } else {
+        break;
+      }
+    }
+
+    // 4. Return a code point whose value is code point offset +
+    // pointer − offset.
+    return code_point_offset + pointer - offset;
+  }
+
+  /**
+   * @param {number} code_point The |code point| to locate in the gb18030 index.
+   * @return {number} The first pointer corresponding to |code point| in the
+   *     gb18030 index.
+   */
+  function indexGB18030RangesPointerFor(code_point) {
+    // 1. If code point is U+E7C7, return pointer 7457.
+    if (code_point === 0xE7C7) return 7457;
+
+    // 2. Let offset be the last code point in index gb18030 ranges
+    // that is equal to or less than code point and let pointer offset
+    // be its corresponding pointer.
+    var offset = 0;
+    var pointer_offset = 0;
+    var idx = index('gb18030-ranges');
+    var i;
+    for (i = 0; i < idx.length; ++i) {
+      /** @type {!Array.<number>} */
+      var entry = idx[i];
+      if (entry[1] <= code_point) {
+        offset = entry[1];
+        pointer_offset = entry[0];
+      } else {
+        break;
+      }
+    }
+
+    // 3. Return a pointer whose value is pointer offset + code point
+    // − offset.
+    return pointer_offset + code_point - offset;
+  }
+
+  /**
+   * @param {number} code_point The |code_point| to search for in the Shift_JIS
+   *     index.
+   * @return {?number} The code point corresponding to |pointer| in |index|,
+   *     or null if |code point| is not in the Shift_JIS index.
+   */
+  function indexShiftJISPointerFor(code_point) {
+    // 1. Let index be index jis0208 excluding all entries whose
+    // pointer is in the range 8272 to 8835, inclusive.
+    shift_jis_index = shift_jis_index ||
+      index('jis0208').map(function(code_point, pointer) {
+        return inRange(pointer, 8272, 8835) ? null : code_point;
+      });
+    var index_ = shift_jis_index;
+
+    // 2. Return the index pointer for code point in index.
+    return index_.indexOf(code_point);
+  }
+  var shift_jis_index;
+
+  /**
+   * @param {number} code_point The |code_point| to search for in the big5
+   *     index.
+   * @return {?number} The code point corresponding to |pointer| in |index|,
+   *     or null if |code point| is not in the big5 index.
+   */
+  function indexBig5PointerFor(code_point) {
+    // 1. Let index be index Big5 excluding all entries whose pointer
+    big5_index_no_hkscs = big5_index_no_hkscs ||
+      index('big5').map(function(code_point, pointer) {
+        return (pointer < (0xA1 - 0x81) * 157) ? null : code_point;
+      });
+    var index_ = big5_index_no_hkscs;
+
+    // 2. If code point is U+2550, U+255E, U+2561, U+256A, U+5341, or
+    // U+5345, return the last pointer corresponding to code point in
+    // index.
+    if (code_point === 0x2550 || code_point === 0x255E ||
+        code_point === 0x2561 || code_point === 0x256A ||
+        code_point === 0x5341 || code_point === 0x5345) {
+      return index_.lastIndexOf(code_point);
+    }
+
+    // 3. Return the index pointer for code point in index.
+    return indexPointerFor(code_point, index_);
+  }
+  var big5_index_no_hkscs;
+
+  //
+  // 8. API
+  //
+
+  /** @const */ var DEFAULT_ENCODING = 'utf-8';
+
+  // 8.1 Interface TextDecoder
+
+  /**
+   * @constructor
+   * @param {string=} label The label of the encoding;
+   *     defaults to 'utf-8'.
+   * @param {Object=} options
+   */
+  function TextDecoder(label, options) {
+    // Web IDL conventions
+    if (!(this instanceof TextDecoder))
+      throw TypeError('Called as a function. Did you forget \'new\'?');
+    label = label !== undefined ? String(label) : DEFAULT_ENCODING;
+    options = ToDictionary(options);
+
+    // A TextDecoder object has an associated encoding, decoder,
+    // stream, ignore BOM flag (initially unset), BOM seen flag
+    // (initially unset), error mode (initially replacement), and do
+    // not flush flag (initially unset).
+
+    /** @private */
+    this._encoding = null;
+    /** @private @type {?Decoder} */
+    this._decoder = null;
+    /** @private @type {boolean} */
+    this._ignoreBOM = false;
+    /** @private @type {boolean} */
+    this._BOMseen = false;
+    /** @private @type {string} */
+    this._error_mode = 'replacement';
+    /** @private @type {boolean} */
+    this._do_not_flush = false;
+
+
+    // 1. Let encoding be the result of getting an encoding from
+    // label.
+    var encoding = getEncoding(label);
+
+    // 2. If encoding is failure or replacement, throw a RangeError.
+    if (encoding === null || encoding.name === 'replacement')
+      throw RangeError('Unknown encoding: ' + label);
+    if (!decoders[encoding.name]) {
+      throw Error('Decoder not present.' +
+                  ' Did you forget to include encoding-indexes.js first?');
+    }
+
+    // 3. Let dec be a new TextDecoder object.
+    var dec = this;
+
+    // 4. Set dec's encoding to encoding.
+    dec._encoding = encoding;
+
+    // 5. If options's fatal member is true, set dec's error mode to
+    // fatal.
+    if (Boolean(options['fatal']))
+      dec._error_mode = 'fatal';
+
+    // 6. If options's ignoreBOM member is true, set dec's ignore BOM
+    // flag.
+    if (Boolean(options['ignoreBOM']))
+      dec._ignoreBOM = true;
+
+    // For pre-ES5 runtimes:
+    if (!Object.defineProperty) {
+      this.encoding = dec._encoding.name.toLowerCase();
+      this.fatal = dec._error_mode === 'fatal';
+      this.ignoreBOM = dec._ignoreBOM;
+    }
+
+    // 7. Return dec.
+    return dec;
+  }
+
+  if (Object.defineProperty) {
+    // The encoding attribute's getter must return encoding's name.
+    Object.defineProperty(TextDecoder.prototype, 'encoding', {
+      /** @this {TextDecoder} */
+      get: function() { return this._encoding.name.toLowerCase(); }
+    });
+
+    // The fatal attribute's getter must return true if error mode
+    // is fatal, and false otherwise.
+    Object.defineProperty(TextDecoder.prototype, 'fatal', {
+      /** @this {TextDecoder} */
+      get: function() { return this._error_mode === 'fatal'; }
+    });
+
+    // The ignoreBOM attribute's getter must return true if ignore
+    // BOM flag is set, and false otherwise.
+    Object.defineProperty(TextDecoder.prototype, 'ignoreBOM', {
+      /** @this {TextDecoder} */
+      get: function() { return this._ignoreBOM; }
+    });
+  }
+
+  /**
+   * @param {BufferSource=} input The buffer of bytes to decode.
+   * @param {Object=} options
+   * @return {string} The decoded string.
+   */
+  TextDecoder.prototype.decode = function decode(input, options) {
+    var bytes;
+    if (typeof input === 'object' && input instanceof ArrayBuffer) {
+      bytes = new Uint8Array(input);
+    } else if (typeof input === 'object' && 'buffer' in input &&
+               input.buffer instanceof ArrayBuffer) {
+      bytes = new Uint8Array(input.buffer,
+                             input.byteOffset,
+                             input.byteLength);
+    } else {
+      bytes = new Uint8Array(0);
+    }
+
+    options = ToDictionary(options);
+
+    // 1. If the do not flush flag is unset, set decoder to a new
+    // encoding's decoder, set stream to a new stream, and unset the
+    // BOM seen flag.
+    if (!this._do_not_flush) {
+      this._decoder = decoders[this._encoding.name]({
+        fatal: this._error_mode === 'fatal'});
+      this._BOMseen = false;
+    }
+
+    // 2. If options's stream is true, set the do not flush flag, and
+    // unset the do not flush flag otherwise.
+    this._do_not_flush = Boolean(options['stream']);
+
+    // 3. If input is given, push a copy of input to stream.
+    // TODO: Align with spec algorithm - maintain stream on instance.
+    var input_stream = new Stream(bytes);
+
+    // 4. Let output be a new stream.
+    var output = [];
+
+    /** @type {?(number|!Array.<number>)} */
+    var result;
+
+    // 5. While true:
+    while (true) {
+      // 1. Let token be the result of reading from stream.
+      var token = input_stream.read();
+
+      // 2. If token is end-of-stream and the do not flush flag is
+      // set, return output, serialized.
+      // TODO: Align with spec algorithm.
+      if (token === end_of_stream)
+        break;
+
+      // 3. Otherwise, run these subsubsteps:
+
+      // 1. Let result be the result of processing token for decoder,
+      // stream, output, and error mode.
+      result = this._decoder.handler(input_stream, token);
+
+      // 2. If result is finished, return output, serialized.
+      if (result === finished)
+        break;
+
+      if (result !== null) {
+        if (Array.isArray(result))
+          output.push.apply(output, /**@type {!Array.<number>}*/(result));
+        else
+          output.push(result);
+      }
+
+      // 3. Otherwise, if result is error, throw a TypeError.
+      // (Thrown in handler)
+
+      // 4. Otherwise, do nothing.
+    }
+    // TODO: Align with spec algorithm.
+    if (!this._do_not_flush) {
+      do {
+        result = this._decoder.handler(input_stream, input_stream.read());
+        if (result === finished)
+          break;
+        if (result === null)
+          continue;
+        if (Array.isArray(result))
+          output.push.apply(output, /**@type {!Array.<number>}*/(result));
+        else
+          output.push(result);
+      } while (!input_stream.endOfStream());
+      this._decoder = null;
+    }
+
+    // A TextDecoder object also has an associated serialize stream
+    // algorithm...
+    /**
+     * @param {!Array.<number>} stream
+     * @return {string}
+     * @this {TextDecoder}
+     */
+    function serializeStream(stream) {
+      // 1. Let token be the result of reading from stream.
+      // (Done in-place on array, rather than as a stream)
+
+      // 2. If encoding is UTF-8, UTF-16BE, or UTF-16LE, and ignore
+      // BOM flag and BOM seen flag are unset, run these subsubsteps:
+      if (includes(['UTF-8', 'UTF-16LE', 'UTF-16BE'], this._encoding.name) &&
+          !this._ignoreBOM && !this._BOMseen) {
+        if (stream.length > 0 && stream[0] === 0xFEFF) {
+          // 1. If token is U+FEFF, set BOM seen flag.
+          this._BOMseen = true;
+          stream.shift();
+        } else if (stream.length > 0) {
+          // 2. Otherwise, if token is not end-of-stream, set BOM seen
+          // flag and append token to stream.
+          this._BOMseen = true;
+        } else {
+          // 3. Otherwise, if token is not end-of-stream, append token
+          // to output.
+          // (no-op)
+        }
+      }
+      // 4. Otherwise, return output.
+      return codePointsToString(stream);
+    }
+
+    return serializeStream.call(this, output);
+  };
+
+  // 8.2 Interface TextEncoder
+
+  /**
+   * @constructor
+   * @param {string=} label The label of the encoding. NONSTANDARD.
+   * @param {Object=} options NONSTANDARD.
+   */
+  function TextEncoder(label, options) {
+    // Web IDL conventions
+    if (!(this instanceof TextEncoder))
+      throw TypeError('Called as a function. Did you forget \'new\'?');
+    options = ToDictionary(options);
+
+    // A TextEncoder object has an associated encoding and encoder.
+
+    /** @private */
+    this._encoding = null;
+    /** @private @type {?Encoder} */
+    this._encoder = null;
+
+    // Non-standard
+    /** @private @type {boolean} */
+    this._do_not_flush = false;
+    /** @private @type {string} */
+    this._fatal = Boolean(options['fatal']) ? 'fatal' : 'replacement';
+
+    // 1. Let enc be a new TextEncoder object.
+    var enc = this;
+
+    // 2. Set enc's encoding to UTF-8's encoder.
+    if (Boolean(options['NONSTANDARD_allowLegacyEncoding'])) {
+      // NONSTANDARD behavior.
+      label = label !== undefined ? String(label) : DEFAULT_ENCODING;
+      var encoding = getEncoding(label);
+      if (encoding === null || encoding.name === 'replacement')
+        throw RangeError('Unknown encoding: ' + label);
+      if (!encoders[encoding.name]) {
+        throw Error('Encoder not present.' +
+                    ' Did you forget to include encoding-indexes.js first?');
+      }
+      enc._encoding = encoding;
+    } else {
+      // Standard behavior.
+      enc._encoding = getEncoding('utf-8');
+
+      if (label !== undefined && 'console' in global) {
+        console.warn('TextEncoder constructor called with encoding label, '
+                     + 'which is ignored.');
+      }
+    }
+
+    // For pre-ES5 runtimes:
+    if (!Object.defineProperty)
+      this.encoding = enc._encoding.name.toLowerCase();
+
+    // 3. Return enc.
+    return enc;
+  }
+
+  if (Object.defineProperty) {
+    // The encoding attribute's getter must return encoding's name.
+    Object.defineProperty(TextEncoder.prototype, 'encoding', {
+      /** @this {TextEncoder} */
+      get: function() { return this._encoding.name.toLowerCase(); }
+    });
+  }
+
+  /**
+   * @param {string=} opt_string The string to encode.
+   * @param {Object=} options
+   * @return {!Uint8Array} Encoded bytes, as a Uint8Array.
+   */
+  TextEncoder.prototype.encode = function encode(opt_string, options) {
+    opt_string = opt_string === undefined ? '' : String(opt_string);
+    options = ToDictionary(options);
+
+    // NOTE: This option is nonstandard. None of the encodings
+    // permitted for encoding (i.e. UTF-8, UTF-16) are stateful when
+    // the input is a USVString so streaming is not necessary.
+    if (!this._do_not_flush)
+      this._encoder = encoders[this._encoding.name]({
+        fatal: this._fatal === 'fatal'});
+    this._do_not_flush = Boolean(options['stream']);
+
+    // 1. Convert input to a stream.
+    var input = new Stream(stringToCodePoints(opt_string));
+
+    // 2. Let output be a new stream
+    var output = [];
+
+    /** @type {?(number|!Array.<number>)} */
+    var result;
+    // 3. While true, run these substeps:
+    while (true) {
+      // 1. Let token be the result of reading from input.
+      var token = input.read();
+      if (token === end_of_stream)
+        break;
+      // 2. Let result be the result of processing token for encoder,
+      // input, output.
+      result = this._encoder.handler(input, token);
+      if (result === finished)
+        break;
+      if (Array.isArray(result))
+        output.push.apply(output, /**@type {!Array.<number>}*/(result));
+      else
+        output.push(result);
+    }
+    // TODO: Align with spec algorithm.
+    if (!this._do_not_flush) {
+      while (true) {
+        result = this._encoder.handler(input, input.read());
+        if (result === finished)
+          break;
+        if (Array.isArray(result))
+          output.push.apply(output, /**@type {!Array.<number>}*/(result));
+        else
+          output.push(result);
+      }
+      this._encoder = null;
+    }
+    // 3. If result is finished, convert output into a byte sequence,
+    // and then return a Uint8Array object wrapping an ArrayBuffer
+    // containing output.
+    return new Uint8Array(output);
+  };
+
+
+  //
+  // 9. The encoding
+  //
+
+  // 9.1 utf-8
+
+  // 9.1.1 utf-8 decoder
+  /**
+   * @constructor
+   * @implements {Decoder}
+   * @param {{fatal: boolean}} options
+   */
+  function UTF8Decoder(options) {
+    var fatal = options.fatal;
+
+    // utf-8's decoder's has an associated utf-8 code point, utf-8
+    // bytes seen, and utf-8 bytes needed (all initially 0), a utf-8
+    // lower boundary (initially 0x80), and a utf-8 upper boundary
+    // (initially 0xBF).
+    var /** @type {number} */ utf8_code_point = 0,
+        /** @type {number} */ utf8_bytes_seen = 0,
+        /** @type {number} */ utf8_bytes_needed = 0,
+        /** @type {number} */ utf8_lower_boundary = 0x80,
+        /** @type {number} */ utf8_upper_boundary = 0xBF;
+
+    /**
+     * @param {Stream} stream The stream of bytes being decoded.
+     * @param {number} bite The next byte read from the stream.
+     * @return {?(number|!Array.<number>)} The next code point(s)
+     *     decoded, or null if not enough data exists in the input
+     *     stream to decode a complete code point.
+     */
+    this.handler = function(stream, bite) {
+      // 1. If byte is end-of-stream and utf-8 bytes needed is not 0,
+      // set utf-8 bytes needed to 0 and return error.
+      if (bite === end_of_stream && utf8_bytes_needed !== 0) {
+        utf8_bytes_needed = 0;
+        return decoderError(fatal);
+      }
+
+      // 2. If byte is end-of-stream, return finished.
+      if (bite === end_of_stream)
+        return finished;
+
+      // 3. If utf-8 bytes needed is 0, based on byte:
+      if (utf8_bytes_needed === 0) {
+
+        // 0x00 to 0x7F
+        if (inRange(bite, 0x00, 0x7F)) {
+          // Return a code point whose value is byte.
+          return bite;
+        }
+
+        // 0xC2 to 0xDF
+        else if (inRange(bite, 0xC2, 0xDF)) {
+          // 1. Set utf-8 bytes needed to 1.
+          utf8_bytes_needed = 1;
+
+          // 2. Set UTF-8 code point to byte & 0x1F.
+          utf8_code_point = bite & 0x1F;
+        }
+
+        // 0xE0 to 0xEF
+        else if (inRange(bite, 0xE0, 0xEF)) {
+          // 1. If byte is 0xE0, set utf-8 lower boundary to 0xA0.
+          if (bite === 0xE0)
+            utf8_lower_boundary = 0xA0;
+          // 2. If byte is 0xED, set utf-8 upper boundary to 0x9F.
+          if (bite === 0xED)
+            utf8_upper_boundary = 0x9F;
+          // 3. Set utf-8 bytes needed to 2.
+          utf8_bytes_needed = 2;
+          // 4. Set UTF-8 code point to byte & 0xF.
+          utf8_code_point = bite & 0xF;
+        }
+
+        // 0xF0 to 0xF4
+        else if (inRange(bite, 0xF0, 0xF4)) {
+          // 1. If byte is 0xF0, set utf-8 lower boundary to 0x90.
+          if (bite === 0xF0)
+            utf8_lower_boundary = 0x90;
+          // 2. If byte is 0xF4, set utf-8 upper boundary to 0x8F.
+          if (bite === 0xF4)
+            utf8_upper_boundary = 0x8F;
+          // 3. Set utf-8 bytes needed to 3.
+          utf8_bytes_needed = 3;
+          // 4. Set UTF-8 code point to byte & 0x7.
+          utf8_code_point = bite & 0x7;
+        }
+
+        // Otherwise
+        else {
+          // Return error.
+          return decoderError(fatal);
+        }
+
+        // Return continue.
+        return null;
+      }
+
+      // 4. If byte is not in the range utf-8 lower boundary to utf-8
+      // upper boundary, inclusive, run these substeps:
+      if (!inRange(bite, utf8_lower_boundary, utf8_upper_boundary)) {
+
+        // 1. Set utf-8 code point, utf-8 bytes needed, and utf-8
+        // bytes seen to 0, set utf-8 lower boundary to 0x80, and set
+        // utf-8 upper boundary to 0xBF.
+        utf8_code_point = utf8_bytes_needed = utf8_bytes_seen = 0;
+        utf8_lower_boundary = 0x80;
+        utf8_upper_boundary = 0xBF;
+
+        // 2. Prepend byte to stream.
+        stream.prepend(bite);
+
+        // 3. Return error.
+        return decoderError(fatal);
+      }
+
+      // 5. Set utf-8 lower boundary to 0x80 and utf-8 upper boundary
+      // to 0xBF.
+      utf8_lower_boundary = 0x80;
+      utf8_upper_boundary = 0xBF;
+
+      // 6. Set UTF-8 code point to (UTF-8 code point << 6) | (byte &
+      // 0x3F)
+      utf8_code_point = (utf8_code_point << 6) | (bite & 0x3F);
+
+      // 7. Increase utf-8 bytes seen by one.
+      utf8_bytes_seen += 1;
+
+      // 8. If utf-8 bytes seen is not equal to utf-8 bytes needed,
+      // continue.
+      if (utf8_bytes_seen !== utf8_bytes_needed)
+        return null;
+
+      // 9. Let code point be utf-8 code point.
+      var code_point = utf8_code_point;
+
+      // 10. Set utf-8 code point, utf-8 bytes needed, and utf-8 bytes
+      // seen to 0.
+      utf8_code_point = utf8_bytes_needed = utf8_bytes_seen = 0;
+
+      // 11. Return a code point whose value is code point.
+      return code_point;
+    };
+  }
+
+  // 9.1.2 utf-8 encoder
+  /**
+   * @constructor
+   * @implements {Encoder}
+   * @param {{fatal: boolean}} options
+   */
+  function UTF8Encoder(options) {
+    var fatal = options.fatal;
+    /**
+     * @param {Stream} stream Input stream.
+     * @param {number} code_point Next code point read from the stream.
+     * @return {(number|!Array.<number>)} Byte(s) to emit.
+     */
+    this.handler = function(stream, code_point) {
+      // 1. If code point is end-of-stream, return finished.
+      if (code_point === end_of_stream)
+        return finished;
+
+      // 2. If code point is an ASCII code point, return a byte whose
+      // value is code point.
+      if (isASCIICodePoint(code_point))
+        return code_point;
+
+      // 3. Set count and offset based on the range code point is in:
+      var count, offset;
+      // U+0080 to U+07FF, inclusive:
+      if (inRange(code_point, 0x0080, 0x07FF)) {
+        // 1 and 0xC0
+        count = 1;
+        offset = 0xC0;
+      }
+      // U+0800 to U+FFFF, inclusive:
+      else if (inRange(code_point, 0x0800, 0xFFFF)) {
+        // 2 and 0xE0
+        count = 2;
+        offset = 0xE0;
+      }
+      // U+10000 to U+10FFFF, inclusive:
+      else if (inRange(code_point, 0x10000, 0x10FFFF)) {
+        // 3 and 0xF0
+        count = 3;
+        offset = 0xF0;
+      }
+
+      // 4. Let bytes be a byte sequence whose first byte is (code
+      // point >> (6 × count)) + offset.
+      var bytes = [(code_point >> (6 * count)) + offset];
+
+      // 5. Run these substeps while count is greater than 0:
+      while (count > 0) {
+
+        // 1. Set temp to code point >> (6 × (count − 1)).
+        var temp = code_point >> (6 * (count - 1));
+
+        // 2. Append to bytes 0x80 | (temp & 0x3F).
+        bytes.push(0x80 | (temp & 0x3F));
+
+        // 3. Decrease count by one.
+        count -= 1;
+      }
+
+      // 6. Return bytes bytes, in order.
+      return bytes;
+    };
+  }
+
+  /** @param {{fatal: boolean}} options */
+  encoders['UTF-8'] = function(options) {
+    return new UTF8Encoder(options);
+  };
+  /** @param {{fatal: boolean}} options */
+  decoders['UTF-8'] = function(options) {
+    return new UTF8Decoder(options);
+  };
+
+  //
+  // 10. Legacy single-byte encodings
+  //
+
+  // 10.1 single-byte decoder
+  /**
+   * @constructor
+   * @implements {Decoder}
+   * @param {!Array.<number>} index The encoding index.
+   * @param {{fatal: boolean}} options
+   */
+  function SingleByteDecoder(index, options) {
+    var fatal = options.fatal;
+    /**
+     * @param {Stream} stream The stream of bytes being decoded.
+     * @param {number} bite The next byte read from the stream.
+     * @return {?(number|!Array.<number>)} The next code point(s)
+     *     decoded, or null if not enough data exists in the input
+     *     stream to decode a complete code point.
+     */
+    this.handler = function(stream, bite) {
+      // 1. If byte is end-of-stream, return finished.
+      if (bite === end_of_stream)
+        return finished;
+
+      // 2. If byte is an ASCII byte, return a code point whose value
+      // is byte.
+      if (isASCIIByte(bite))
+        return bite;
+
+      // 3. Let code point be the index code point for byte − 0x80 in
+      // index single-byte.
+      var code_point = index[bite - 0x80];
+
+      // 4. If code point is null, return error.
+      if (code_point === null)
+        return decoderError(fatal);
+
+      // 5. Return a code point whose value is code point.
+      return code_point;
+    };
+  }
+
+  // 10.2 single-byte encoder
+  /**
+   * @constructor
+   * @implements {Encoder}
+   * @param {!Array.<?number>} index The encoding index.
+   * @param {{fatal: boolean}} options
+   */
+  function SingleByteEncoder(index, options) {
+    var fatal = options.fatal;
+    /**
+     * @param {Stream} stream Input stream.
+     * @param {number} code_point Next code point read from the stream.
+     * @return {(number|!Array.<number>)} Byte(s) to emit.
+     */
+    this.handler = function(stream, code_point) {
+      // 1. If code point is end-of-stream, return finished.
+      if (code_point === end_of_stream)
+        return finished;
+
+      // 2. If code point is an ASCII code point, return a byte whose
+      // value is code point.
+      if (isASCIICodePoint(code_point))
+        return code_point;
+
+      // 3. Let pointer be the index pointer for code point in index
+      // single-byte.
+      var pointer = indexPointerFor(code_point, index);
+
+      // 4. If pointer is null, return error with code point.
+      if (pointer === null)
+        encoderError(code_point);
+
+      // 5. Return a byte whose value is pointer + 0x80.
+      return pointer + 0x80;
+    };
+  }
+
+  (function() {
+    if (!('encoding-indexes' in global))
+      return;
+    encodings.forEach(function(category) {
+      if (category.heading !== 'Legacy single-byte encodings')
+        return;
+      category.encodings.forEach(function(encoding) {
+        var name = encoding.name;
+        var idx = index(name.toLowerCase());
+        /** @param {{fatal: boolean}} options */
+        decoders[name] = function(options) {
+          return new SingleByteDecoder(idx, options);
+        };
+        /** @param {{fatal: boolean}} options */
+        encoders[name] = function(options) {
+          return new SingleByteEncoder(idx, options);
+        };
+      });
+    });
+  }());
+
+  //
+  // 11. Legacy multi-byte Chinese (simplified) encodings
+  //
+
+  // 11.1 gbk
+
+  // 11.1.1 gbk decoder
+  // gbk's decoder is gb18030's decoder.
+  /** @param {{fatal: boolean}} options */
+  decoders['GBK'] = function(options) {
+    return new GB18030Decoder(options);
+  };
+
+  // 11.1.2 gbk encoder
+  // gbk's encoder is gb18030's encoder with its gbk flag set.
+  /** @param {{fatal: boolean}} options */
+  encoders['GBK'] = function(options) {
+    return new GB18030Encoder(options, true);
+  };
+
+  // 11.2 gb18030
+  // 11.2.1 gb18030 decoder
+  /**
+   * @constructor
+   * @implements {Decoder}
+   * @param {{fatal: boolean}} options
+   */
+  function GB18030Decoder(options) {
+    var fatal = options.fatal;
+    // gb18030's decoder has an associated gb18030 first, gb18030
+    // second, and gb18030 third (all initially 0x00).
+    var /** @type {number} */ gb18030_first = 0x00,
+        /** @type {number} */ gb18030_second = 0x00,
+        /** @type {number} */ gb18030_third = 0x00;
+    /**
+     * @param {Stream} stream The stream of bytes being decoded.
+     * @param {number} bite The next byte read from the stream.
+     * @return {?(number|!Array.<number>)} The next code point(s)
+     *     decoded, or null if not enough data exists in the input
+     *     stream to decode a complete code point.
+     */
+    this.handler = function(stream, bite) {
+      // 1. If byte is end-of-stream and gb18030 first, gb18030
+      // second, and gb18030 third are 0x00, return finished.
+      if (bite === end_of_stream && gb18030_first === 0x00 &&
+          gb18030_second === 0x00 && gb18030_third === 0x00) {
+        return finished;
+      }
+      // 2. If byte is end-of-stream, and gb18030 first, gb18030
+      // second, or gb18030 third is not 0x00, set gb18030 first,
+      // gb18030 second, and gb18030 third to 0x00, and return error.
+      if (bite === end_of_stream &&
+          (gb18030_first !== 0x00 || gb18030_second !== 0x00 ||
+           gb18030_third !== 0x00)) {
+        gb18030_first = 0x00;
+        gb18030_second = 0x00;
+        gb18030_third = 0x00;
+        decoderError(fatal);
+      }
+      var code_point;
+      // 3. If gb18030 third is not 0x00, run these substeps:
+      if (gb18030_third !== 0x00) {
+        // 1. Let code point be null.
+        code_point = null;
+        // 2. If byte is in the range 0x30 to 0x39, inclusive, set
+        // code point to the index gb18030 ranges code point for
+        // (((gb18030 first − 0x81) × 10 + gb18030 second − 0x30) ×
+        // 126 + gb18030 third − 0x81) × 10 + byte − 0x30.
+        if (inRange(bite, 0x30, 0x39)) {
+          code_point = indexGB18030RangesCodePointFor(
+              (((gb18030_first - 0x81) * 10 + gb18030_second - 0x30) * 126 +
+               gb18030_third - 0x81) * 10 + bite - 0x30);
+        }
+
+        // 3. Let buffer be a byte sequence consisting of gb18030
+        // second, gb18030 third, and byte, in order.
+        var buffer = [gb18030_second, gb18030_third, bite];
+
+        // 4. Set gb18030 first, gb18030 second, and gb18030 third to
+        // 0x00.
+        gb18030_first = 0x00;
+        gb18030_second = 0x00;
+        gb18030_third = 0x00;
+
+        // 5. If code point is null, prepend buffer to stream and
+        // return error.
+        if (code_point === null) {
+          stream.prepend(buffer);
+          return decoderError(fatal);
+        }
+
+        // 6. Return a code point whose value is code point.
+        return code_point;
+      }
+
+      // 4. If gb18030 second is not 0x00, run these substeps:
+      if (gb18030_second !== 0x00) {
+
+        // 1. If byte is in the range 0x81 to 0xFE, inclusive, set
+        // gb18030 third to byte and return continue.
+        if (inRange(bite, 0x81, 0xFE)) {
+          gb18030_third = bite;
+          return null;
+        }
+
+        // 2. Prepend gb18030 second followed by byte to stream, set
+        // gb18030 first and gb18030 second to 0x00, and return error.
+        stream.prepend([gb18030_second, bite]);
+        gb18030_first = 0x00;
+        gb18030_second = 0x00;
+        return decoderError(fatal);
+      }
+
+      // 5. If gb18030 first is not 0x00, run these substeps:
+      if (gb18030_first !== 0x00) {
+
+        // 1. If byte is in the range 0x30 to 0x39, inclusive, set
+        // gb18030 second to byte and return continue.
+        if (inRange(bite, 0x30, 0x39)) {
+          gb18030_second = bite;
+          return null;
+        }
+
+        // 2. Let lead be gb18030 first, let pointer be null, and set
+        // gb18030 first to 0x00.
+        var lead = gb18030_first;
+        var pointer = null;
+        gb18030_first = 0x00;
+
+        // 3. Let offset be 0x40 if byte is less than 0x7F and 0x41
+        // otherwise.
+        var offset = bite < 0x7F ? 0x40 : 0x41;
+
+        // 4. If byte is in the range 0x40 to 0x7E, inclusive, or 0x80
+        // to 0xFE, inclusive, set pointer to (lead − 0x81) × 190 +
+        // (byte − offset).
+        if (inRange(bite, 0x40, 0x7E) || inRange(bite, 0x80, 0xFE))
+          pointer = (lead - 0x81) * 190 + (bite - offset);
+
+        // 5. Let code point be null if pointer is null and the index
+        // code point for pointer in index gb18030 otherwise.
+        code_point = pointer === null ? null :
+            indexCodePointFor(pointer, index('gb18030'));
+
+        // 6. If code point is null and byte is an ASCII byte, prepend
+        // byte to stream.
+        if (code_point === null && isASCIIByte(bite))
+          stream.prepend(bite);
+
+        // 7. If code point is null, return error.
+        if (code_point === null)
+          return decoderError(fatal);
+
+        // 8. Return a code point whose value is code point.
+        return code_point;
+      }
+
+      // 6. If byte is an ASCII byte, return a code point whose value
+      // is byte.
+      if (isASCIIByte(bite))
+        return bite;
+
+      // 7. If byte is 0x80, return code point U+20AC.
+      if (bite === 0x80)
+        return 0x20AC;
+
+      // 8. If byte is in the range 0x81 to 0xFE, inclusive, set
+      // gb18030 first to byte and return continue.
+      if (inRange(bite, 0x81, 0xFE)) {
+        gb18030_first = bite;
+        return null;
+      }
+
+      // 9. Return error.
+      return decoderError(fatal);
+    };
+  }
+
+  // 11.2.2 gb18030 encoder
+  /**
+   * @constructor
+   * @implements {Encoder}
+   * @param {{fatal: boolean}} options
+   * @param {boolean=} gbk_flag
+   */
+  function GB18030Encoder(options, gbk_flag) {
+    var fatal = options.fatal;
+    // gb18030's decoder has an associated gbk flag (initially unset).
+    /**
+     * @param {Stream} stream Input stream.
+     * @param {number} code_point Next code point read from the stream.
+     * @return {(number|!Array.<number>)} Byte(s) to emit.
+     */
+    this.handler = function(stream, code_point) {
+      // 1. If code point is end-of-stream, return finished.
+      if (code_point === end_of_stream)
+        return finished;
+
+      // 2. If code point is an ASCII code point, return a byte whose
+      // value is code point.
+      if (isASCIICodePoint(code_point))
+        return code_point;
+
+      // 3. If code point is U+E5E5, return error with code point.
+      if (code_point === 0xE5E5)
+        return encoderError(code_point);
+
+      // 4. If the gbk flag is set and code point is U+20AC, return
+      // byte 0x80.
+      if (gbk_flag && code_point === 0x20AC)
+        return 0x80;
+
+      // 5. Let pointer be the index pointer for code point in index
+      // gb18030.
+      var pointer = indexPointerFor(code_point, index('gb18030'));
+
+      // 6. If pointer is not null, run these substeps:
+      if (pointer !== null) {
+
+        // 1. Let lead be floor(pointer / 190) + 0x81.
+        var lead = floor(pointer / 190) + 0x81;
+
+        // 2. Let trail be pointer % 190.
+        var trail = pointer % 190;
+
+        // 3. Let offset be 0x40 if trail is less than 0x3F and 0x41 otherwise.
+        var offset = trail < 0x3F ? 0x40 : 0x41;
+
+        // 4. Return two bytes whose values are lead and trail + offset.
+        return [lead, trail + offset];
+      }
+
+      // 7. If gbk flag is set, return error with code point.
+      if (gbk_flag)
+        return encoderError(code_point);
+
+      // 8. Set pointer to the index gb18030 ranges pointer for code
+      // point.
+      pointer = indexGB18030RangesPointerFor(code_point);
+
+      // 9. Let byte1 be floor(pointer / 10 / 126 / 10).
+      var byte1 = floor(pointer / 10 / 126 / 10);
+
+      // 10. Set pointer to pointer − byte1 × 10 × 126 × 10.
+      pointer = pointer - byte1 * 10 * 126 * 10;
+
+      // 11. Let byte2 be floor(pointer / 10 / 126).
+      var byte2 = floor(pointer / 10 / 126);
+
+      // 12. Set pointer to pointer − byte2 × 10 × 126.
+      pointer = pointer - byte2 * 10 * 126;
+
+      // 13. Let byte3 be floor(pointer / 10).
+      var byte3 = floor(pointer / 10);
+
+      // 14. Let byte4 be pointer − byte3 × 10.
+      var byte4 = pointer - byte3 * 10;
+
+      // 15. Return four bytes whose values are byte1 + 0x81, byte2 +
+      // 0x30, byte3 + 0x81, byte4 + 0x30.
+      return [byte1 + 0x81,
+              byte2 + 0x30,
+              byte3 + 0x81,
+              byte4 + 0x30];
+    };
+  }
+
+  /** @param {{fatal: boolean}} options */
+  encoders['gb18030'] = function(options) {
+    return new GB18030Encoder(options);
+  };
+  /** @param {{fatal: boolean}} options */
+  decoders['gb18030'] = function(options) {
+    return new GB18030Decoder(options);
+  };
+
+
+  //
+  // 12. Legacy multi-byte Chinese (traditional) encodings
+  //
+
+  // 12.1 Big5
+
+  // 12.1.1 Big5 decoder
+  /**
+   * @constructor
+   * @implements {Decoder}
+   * @param {{fatal: boolean}} options
+   */
+  function Big5Decoder(options) {
+    var fatal = options.fatal;
+    // Big5's decoder has an associated Big5 lead (initially 0x00).
+    var /** @type {number} */ Big5_lead = 0x00;
+
+    /**
+     * @param {Stream} stream The stream of bytes being decoded.
+     * @param {number} bite The next byte read from the stream.
+     * @return {?(number|!Array.<number>)} The next code point(s)
+     *     decoded, or null if not enough data exists in the input
+     *     stream to decode a complete code point.
+     */
+    this.handler = function(stream, bite) {
+      // 1. If byte is end-of-stream and Big5 lead is not 0x00, set
+      // Big5 lead to 0x00 and return error.
+      if (bite === end_of_stream && Big5_lead !== 0x00) {
+        Big5_lead = 0x00;
+        return decoderError(fatal);
+      }
+
+      // 2. If byte is end-of-stream and Big5 lead is 0x00, return
+      // finished.
+      if (bite === end_of_stream && Big5_lead === 0x00)
+        return finished;
+
+      // 3. If Big5 lead is not 0x00, let lead be Big5 lead, let
+      // pointer be null, set Big5 lead to 0x00, and then run these
+      // substeps:
+      if (Big5_lead !== 0x00) {
+        var lead = Big5_lead;
+        var pointer = null;
+        Big5_lead = 0x00;
+
+        // 1. Let offset be 0x40 if byte is less than 0x7F and 0x62
+        // otherwise.
+        var offset = bite < 0x7F ? 0x40 : 0x62;
+
+        // 2. If byte is in the range 0x40 to 0x7E, inclusive, or 0xA1
+        // to 0xFE, inclusive, set pointer to (lead − 0x81) × 157 +
+        // (byte − offset).
+        if (inRange(bite, 0x40, 0x7E) || inRange(bite, 0xA1, 0xFE))
+          pointer = (lead - 0x81) * 157 + (bite - offset);
+
+        // 3. If there is a row in the table below whose first column
+        // is pointer, return the two code points listed in its second
+        // column
+        // Pointer | Code points
+        // --------+--------------
+        // 1133    | U+00CA U+0304
+        // 1135    | U+00CA U+030C
+        // 1164    | U+00EA U+0304
+        // 1166    | U+00EA U+030C
+        switch (pointer) {
+          case 1133: return [0x00CA, 0x0304];
+          case 1135: return [0x00CA, 0x030C];
+          case 1164: return [0x00EA, 0x0304];
+          case 1166: return [0x00EA, 0x030C];
+        }
+
+        // 4. Let code point be null if pointer is null and the index
+        // code point for pointer in index Big5 otherwise.
+        var code_point = (pointer === null) ? null :
+            indexCodePointFor(pointer, index('big5'));
+
+        // 5. If code point is null and byte is an ASCII byte, prepend
+        // byte to stream.
+        if (code_point === null && isASCIIByte(bite))
+          stream.prepend(bite);
+
+        // 6. If code point is null, return error.
+        if (code_point === null)
+          return decoderError(fatal);
+
+        // 7. Return a code point whose value is code point.
+        return code_point;
+      }
+
+      // 4. If byte is an ASCII byte, return a code point whose value
+      // is byte.
+      if (isASCIIByte(bite))
+        return bite;
+
+      // 5. If byte is in the range 0x81 to 0xFE, inclusive, set Big5
+      // lead to byte and return continue.
+      if (inRange(bite, 0x81, 0xFE)) {
+        Big5_lead = bite;
+        return null;
+      }
+
+      // 6. Return error.
+      return decoderError(fatal);
+    };
+  }
+
+  // 12.1.2 Big5 encoder
+  /**
+   * @constructor
+   * @implements {Encoder}
+   * @param {{fatal: boolean}} options
+   */
+  function Big5Encoder(options) {
+    var fatal = options.fatal;
+    /**
+     * @param {Stream} stream Input stream.
+     * @param {number} code_point Next code point read from the stream.
+     * @return {(number|!Array.<number>)} Byte(s) to emit.
+     */
+    this.handler = function(stream, code_point) {
+      // 1. If code point is end-of-stream, return finished.
+      if (code_point === end_of_stream)
+        return finished;
+
+      // 2. If code point is an ASCII code point, return a byte whose
+      // value is code point.
+      if (isASCIICodePoint(code_point))
+        return code_point;
+
+      // 3. Let pointer be the index Big5 pointer for code point.
+      var pointer = indexBig5PointerFor(code_point);
+
+      // 4. If pointer is null, return error with code point.
+      if (pointer === null)
+        return encoderError(code_point);
+
+      // 5. Let lead be floor(pointer / 157) + 0x81.
+      var lead = floor(pointer / 157) + 0x81;
+
+      // 6. If lead is less than 0xA1, return error with code point.
+      if (lead < 0xA1)
+        return encoderError(code_point);
+
+      // 7. Let trail be pointer % 157.
+      var trail = pointer % 157;
+
+      // 8. Let offset be 0x40 if trail is less than 0x3F and 0x62
+      // otherwise.
+      var offset = trail < 0x3F ? 0x40 : 0x62;
+
+      // Return two bytes whose values are lead and trail + offset.
+      return [lead, trail + offset];
+    };
+  }
+
+  /** @param {{fatal: boolean}} options */
+  encoders['Big5'] = function(options) {
+    return new Big5Encoder(options);
+  };
+  /** @param {{fatal: boolean}} options */
+  decoders['Big5'] = function(options) {
+    return new Big5Decoder(options);
+  };
+
+
+  //
+  // 13. Legacy multi-byte Japanese encodings
+  //
+
+  // 13.1 euc-jp
+
+  // 13.1.1 euc-jp decoder
+  /**
+   * @constructor
+   * @implements {Decoder}
+   * @param {{fatal: boolean}} options
+   */
+  function EUCJPDecoder(options) {
+    var fatal = options.fatal;
+
+    // euc-jp's decoder has an associated euc-jp jis0212 flag
+    // (initially unset) and euc-jp lead (initially 0x00).
+    var /** @type {boolean} */ eucjp_jis0212_flag = false,
+        /** @type {number} */ eucjp_lead = 0x00;
+
+    /**
+     * @param {Stream} stream The stream of bytes being decoded.
+     * @param {number} bite The next byte read from the stream.
+     * @return {?(number|!Array.<number>)} The next code point(s)
+     *     decoded, or null if not enough data exists in the input
+     *     stream to decode a complete code point.
+     */
+    this.handler = function(stream, bite) {
+      // 1. If byte is end-of-stream and euc-jp lead is not 0x00, set
+      // euc-jp lead to 0x00, and return error.
+      if (bite === end_of_stream && eucjp_lead !== 0x00) {
+        eucjp_lead = 0x00;
+        return decoderError(fatal);
+      }
+
+      // 2. If byte is end-of-stream and euc-jp lead is 0x00, return
+      // finished.
+      if (bite === end_of_stream && eucjp_lead === 0x00)
+        return finished;
+
+      // 3. If euc-jp lead is 0x8E and byte is in the range 0xA1 to
+      // 0xDF, inclusive, set euc-jp lead to 0x00 and return a code
+      // point whose value is 0xFF61 − 0xA1 + byte.
+      if (eucjp_lead === 0x8E && inRange(bite, 0xA1, 0xDF)) {
+        eucjp_lead = 0x00;
+        return 0xFF61 - 0xA1 + bite;
+      }
+
+      // 4. If euc-jp lead is 0x8F and byte is in the range 0xA1 to
+      // 0xFE, inclusive, set the euc-jp jis0212 flag, set euc-jp lead
+      // to byte, and return continue.
+      if (eucjp_lead === 0x8F && inRange(bite, 0xA1, 0xFE)) {
+        eucjp_jis0212_flag = true;
+        eucjp_lead = bite;
+        return null;
+      }
+
+      // 5. If euc-jp lead is not 0x00, let lead be euc-jp lead, set
+      // euc-jp lead to 0x00, and run these substeps:
+      if (eucjp_lead !== 0x00) {
+        var lead = eucjp_lead;
+        eucjp_lead = 0x00;
+
+        // 1. Let code point be null.
+        var code_point = null;
+
+        // 2. If lead and byte are both in the range 0xA1 to 0xFE,
+        // inclusive, set code point to the index code point for (lead
+        // − 0xA1) × 94 + byte − 0xA1 in index jis0208 if the euc-jp
+        // jis0212 flag is unset and in index jis0212 otherwise.
+        if (inRange(lead, 0xA1, 0xFE) && inRange(bite, 0xA1, 0xFE)) {
+          code_point = indexCodePointFor(
+            (lead - 0xA1) * 94 + (bite - 0xA1),
+            index(!eucjp_jis0212_flag ? 'jis0208' : 'jis0212'));
+        }
+
+        // 3. Unset the euc-jp jis0212 flag.
+        eucjp_jis0212_flag = false;
+
+        // 4. If byte is not in the range 0xA1 to 0xFE, inclusive,
+        // prepend byte to stream.
+        if (!inRange(bite, 0xA1, 0xFE))
+          stream.prepend(bite);
+
+        // 5. If code point is null, return error.
+        if (code_point === null)
+          return decoderError(fatal);
+
+        // 6. Return a code point whose value is code point.
+        return code_point;
+      }
+
+      // 6. If byte is an ASCII byte, return a code point whose value
+      // is byte.
+      if (isASCIIByte(bite))
+        return bite;
+
+      // 7. If byte is 0x8E, 0x8F, or in the range 0xA1 to 0xFE,
+      // inclusive, set euc-jp lead to byte and return continue.
+      if (bite === 0x8E || bite === 0x8F || inRange(bite, 0xA1, 0xFE)) {
+        eucjp_lead = bite;
+        return null;
+      }
+
+      // 8. Return error.
+      return decoderError(fatal);
+    };
+  }
+
+  // 13.1.2 euc-jp encoder
+  /**
+   * @constructor
+   * @implements {Encoder}
+   * @param {{fatal: boolean}} options
+   */
+  function EUCJPEncoder(options) {
+    var fatal = options.fatal;
+    /**
+     * @param {Stream} stream Input stream.
+     * @param {number} code_point Next code point read from the stream.
+     * @return {(number|!Array.<number>)} Byte(s) to emit.
+     */
+    this.handler = function(stream, code_point) {
+      // 1. If code point is end-of-stream, return finished.
+      if (code_point === end_of_stream)
+        return finished;
+
+      // 2. If code point is an ASCII code point, return a byte whose
+      // value is code point.
+      if (isASCIICodePoint(code_point))
+        return code_point;
+
+      // 3. If code point is U+00A5, return byte 0x5C.
+      if (code_point === 0x00A5)
+        return 0x5C;
+
+      // 4. If code point is U+203E, return byte 0x7E.
+      if (code_point === 0x203E)
+        return 0x7E;
+
+      // 5. If code point is in the range U+FF61 to U+FF9F, inclusive,
+      // return two bytes whose values are 0x8E and code point −
+      // 0xFF61 + 0xA1.
+      if (inRange(code_point, 0xFF61, 0xFF9F))
+        return [0x8E, code_point - 0xFF61 + 0xA1];
+
+      // 6. If code point is U+2212, set it to U+FF0D.
+      if (code_point === 0x2212)
+        code_point = 0xFF0D;
+
+      // 7. Let pointer be the index pointer for code point in index
+      // jis0208.
+      var pointer = indexPointerFor(code_point, index('jis0208'));
+
+      // 8. If pointer is null, return error with code point.
+      if (pointer === null)
+        return encoderError(code_point);
+
+      // 9. Let lead be floor(pointer / 94) + 0xA1.
+      var lead = floor(pointer / 94) + 0xA1;
+
+      // 10. Let trail be pointer % 94 + 0xA1.
+      var trail = pointer % 94 + 0xA1;
+
+      // 11. Return two bytes whose values are lead and trail.
+      return [lead, trail];
+    };
+  }
+
+  /** @param {{fatal: boolean}} options */
+  encoders['EUC-JP'] = function(options) {
+    return new EUCJPEncoder(options);
+  };
+  /** @param {{fatal: boolean}} options */
+  decoders['EUC-JP'] = function(options) {
+    return new EUCJPDecoder(options);
+  };
+
+  // 13.2 iso-2022-jp
+
+  // 13.2.1 iso-2022-jp decoder
+  /**
+   * @constructor
+   * @implements {Decoder}
+   * @param {{fatal: boolean}} options
+   */
+  function ISO2022JPDecoder(options) {
+    var fatal = options.fatal;
+    /** @enum */
+    var states = {
+      ASCII: 0,
+      Roman: 1,
+      Katakana: 2,
+      LeadByte: 3,
+      TrailByte: 4,
+      EscapeStart: 5,
+      Escape: 6
+    };
+    // iso-2022-jp's decoder has an associated iso-2022-jp decoder
+    // state (initially ASCII), iso-2022-jp decoder output state
+    // (initially ASCII), iso-2022-jp lead (initially 0x00), and
+    // iso-2022-jp output flag (initially unset).
+    var /** @type {number} */ iso2022jp_decoder_state = states.ASCII,
+        /** @type {number} */ iso2022jp_decoder_output_state = states.ASCII,
+        /** @type {number} */ iso2022jp_lead = 0x00,
+        /** @type {boolean} */ iso2022jp_output_flag = false;
+    /**
+     * @param {Stream} stream The stream of bytes being decoded.
+     * @param {number} bite The next byte read from the stream.
+     * @return {?(number|!Array.<number>)} The next code point(s)
+     *     decoded, or null if not enough data exists in the input
+     *     stream to decode a complete code point.
+     */
+    this.handler = function(stream, bite) {
+      // switching on iso-2022-jp decoder state:
+      switch (iso2022jp_decoder_state) {
+      default:
+      case states.ASCII:
+        // ASCII
+        // Based on byte:
+
+        // 0x1B
+        if (bite === 0x1B) {
+          // Set iso-2022-jp decoder state to escape start and return
+          // continue.
+          iso2022jp_decoder_state = states.EscapeStart;
+          return null;
+        }
+
+        // 0x00 to 0x7F, excluding 0x0E, 0x0F, and 0x1B
+        if (inRange(bite, 0x00, 0x7F) && bite !== 0x0E
+            && bite !== 0x0F && bite !== 0x1B) {
+          // Unset the iso-2022-jp output flag and return a code point
+          // whose value is byte.
+          iso2022jp_output_flag = false;
+          return bite;
+        }
+
+        // end-of-stream
+        if (bite === end_of_stream) {
+          // Return finished.
+          return finished;
+        }
+
+        // Otherwise
+        // Unset the iso-2022-jp output flag and return error.
+        iso2022jp_output_flag = false;
+        return decoderError(fatal);
+
+      case states.Roman:
+        // Roman
+        // Based on byte:
+
+        // 0x1B
+        if (bite === 0x1B) {
+          // Set iso-2022-jp decoder state to escape start and return
+          // continue.
+          iso2022jp_decoder_state = states.EscapeStart;
+          return null;
+        }
+
+        // 0x5C
+        if (bite === 0x5C) {
+          // Unset the iso-2022-jp output flag and return code point
+          // U+00A5.
+          iso2022jp_output_flag = false;
+          return 0x00A5;
+        }
+
+        // 0x7E
+        if (bite === 0x7E) {
+          // Unset the iso-2022-jp output flag and return code point
+          // U+203E.
+          iso2022jp_output_flag = false;
+          return 0x203E;
+        }
+
+        // 0x00 to 0x7F, excluding 0x0E, 0x0F, 0x1B, 0x5C, and 0x7E
+        if (inRange(bite, 0x00, 0x7F) && bite !== 0x0E && bite !== 0x0F
+            && bite !== 0x1B && bite !== 0x5C && bite !== 0x7E) {
+          // Unset the iso-2022-jp output flag and return a code point
+          // whose value is byte.
+          iso2022jp_output_flag = false;
+          return bite;
+        }
+
+        // end-of-stream
+        if (bite === end_of_stream) {
+          // Return finished.
+          return finished;
+        }
+
+        // Otherwise
+        // Unset the iso-2022-jp output flag and return error.
+        iso2022jp_output_flag = false;
+        return decoderError(fatal);
+
+      case states.Katakana:
+        // Katakana
+        // Based on byte:
+
+        // 0x1B
+        if (bite === 0x1B) {
+          // Set iso-2022-jp decoder state to escape start and return
+          // continue.
+          iso2022jp_decoder_state = states.EscapeStart;
+          return null;
+        }
+
+        // 0x21 to 0x5F
+        if (inRange(bite, 0x21, 0x5F)) {
+          // Unset the iso-2022-jp output flag and return a code point
+          // whose value is 0xFF61 − 0x21 + byte.
+          iso2022jp_output_flag = false;
+          return 0xFF61 - 0x21 + bite;
+        }
+
+        // end-of-stream
+        if (bite === end_of_stream) {
+          // Return finished.
+          return finished;
+        }
+
+        // Otherwise
+        // Unset the iso-2022-jp output flag and return error.
+        iso2022jp_output_flag = false;
+        return decoderError(fatal);
+
+      case states.LeadByte:
+        // Lead byte
+        // Based on byte:
+
+        // 0x1B
+        if (bite === 0x1B) {
+          // Set iso-2022-jp decoder state to escape start and return
+          // continue.
+          iso2022jp_decoder_state = states.EscapeStart;
+          return null;
+        }
+
+        // 0x21 to 0x7E
+        if (inRange(bite, 0x21, 0x7E)) {
+          // Unset the iso-2022-jp output flag, set iso-2022-jp lead
+          // to byte, iso-2022-jp decoder state to trail byte, and
+          // return continue.
+          iso2022jp_output_flag = false;
+          iso2022jp_lead = bite;
+          iso2022jp_decoder_state = states.TrailByte;
+          return null;
+        }
+
+        // end-of-stream
+        if (bite === end_of_stream) {
+          // Return finished.
+          return finished;
+        }
+
+        // Otherwise
+        // Unset the iso-2022-jp output flag and return error.
+        iso2022jp_output_flag = false;
+        return decoderError(fatal);
+
+      case states.TrailByte:
+        // Trail byte
+        // Based on byte:
+
+        // 0x1B
+        if (bite === 0x1B) {
+          // Set iso-2022-jp decoder state to escape start and return
+          // continue.
+          iso2022jp_decoder_state = states.EscapeStart;
+          return decoderError(fatal);
+        }
+
+        // 0x21 to 0x7E
+        if (inRange(bite, 0x21, 0x7E)) {
+          // 1. Set the iso-2022-jp decoder state to lead byte.
+          iso2022jp_decoder_state = states.LeadByte;
+
+          // 2. Let pointer be (iso-2022-jp lead − 0x21) × 94 + byte − 0x21.
+          var pointer = (iso2022jp_lead - 0x21) * 94 + bite - 0x21;
+
+          // 3. Let code point be the index code point for pointer in
+          // index jis0208.
+          var code_point = indexCodePointFor(pointer, index('jis0208'));
+
+          // 4. If code point is null, return error.
+          if (code_point === null)
+            return decoderError(fatal);
+
+          // 5. Return a code point whose value is code point.
+          return code_point;
+        }
+
+        // end-of-stream
+        if (bite === end_of_stream) {
+          // Set the iso-2022-jp decoder state to lead byte, prepend
+          // byte to stream, and return error.
+          iso2022jp_decoder_state = states.LeadByte;
+          stream.prepend(bite);
+          return decoderError(fatal);
+        }
+
+        // Otherwise
+        // Set iso-2022-jp decoder state to lead byte and return
+        // error.
+        iso2022jp_decoder_state = states.LeadByte;
+        return decoderError(fatal);
+
+      case states.EscapeStart:
+        // Escape start
+
+        // 1. If byte is either 0x24 or 0x28, set iso-2022-jp lead to
+        // byte, iso-2022-jp decoder state to escape, and return
+        // continue.
+        if (bite === 0x24 || bite === 0x28) {
+          iso2022jp_lead = bite;
+          iso2022jp_decoder_state = states.Escape;
+          return null;
+        }
+
+        // 2. Prepend byte to stream.
+        stream.prepend(bite);
+
+        // 3. Unset the iso-2022-jp output flag, set iso-2022-jp
+        // decoder state to iso-2022-jp decoder output state, and
+        // return error.
+        iso2022jp_output_flag = false;
+        iso2022jp_decoder_state = iso2022jp_decoder_output_state;
+        return decoderError(fatal);
+
+      case states.Escape:
+        // Escape
+
+        // 1. Let lead be iso-2022-jp lead and set iso-2022-jp lead to
+        // 0x00.
+        var lead = iso2022jp_lead;
+        iso2022jp_lead = 0x00;
+
+        // 2. Let state be null.
+        var state = null;
+
+        // 3. If lead is 0x28 and byte is 0x42, set state to ASCII.
+        if (lead === 0x28 && bite === 0x42)
+          state = states.ASCII;
+
+        // 4. If lead is 0x28 and byte is 0x4A, set state to Roman.
+        if (lead === 0x28 && bite === 0x4A)
+          state = states.Roman;
+
+        // 5. If lead is 0x28 and byte is 0x49, set state to Katakana.
+        if (lead === 0x28 && bite === 0x49)
+          state = states.Katakana;
+
+        // 6. If lead is 0x24 and byte is either 0x40 or 0x42, set
+        // state to lead byte.
+        if (lead === 0x24 && (bite === 0x40 || bite === 0x42))
+          state = states.LeadByte;
+
+        // 7. If state is non-null, run these substeps:
+        if (state !== null) {
+          // 1. Set iso-2022-jp decoder state and iso-2022-jp decoder
+          // output state to states.
+          iso2022jp_decoder_state = iso2022jp_decoder_state = state;
+
+          // 2. Let output flag be the iso-2022-jp output flag.
+          var output_flag = iso2022jp_output_flag;
+
+          // 3. Set the iso-2022-jp output flag.
+          iso2022jp_output_flag = true;
+
+          // 4. Return continue, if output flag is unset, and error
+          // otherwise.
+          return !output_flag ? null : decoderError(fatal);
+        }
+
+        // 8. Prepend lead and byte to stream.
+        stream.prepend([lead, bite]);
+
+        // 9. Unset the iso-2022-jp output flag, set iso-2022-jp
+        // decoder state to iso-2022-jp decoder output state and
+        // return error.
+        iso2022jp_output_flag = false;
+        iso2022jp_decoder_state = iso2022jp_decoder_output_state;
+        return decoderError(fatal);
+      }
+    };
+  }
+
+  // 13.2.2 iso-2022-jp encoder
+  /**
+   * @constructor
+   * @implements {Encoder}
+   * @param {{fatal: boolean}} options
+   */
+  function ISO2022JPEncoder(options) {
+    var fatal = options.fatal;
+    // iso-2022-jp's encoder has an associated iso-2022-jp encoder
+    // state which is one of ASCII, Roman, and jis0208 (initially
+    // ASCII).
+    /** @enum */
+    var states = {
+      ASCII: 0,
+      Roman: 1,
+      jis0208: 2
+    };
+    var /** @type {number} */ iso2022jp_state = states.ASCII;
+    /**
+     * @param {Stream} stream Input stream.
+     * @param {number} code_point Next code point read from the stream.
+     * @return {(number|!Array.<number>)} Byte(s) to emit.
+     */
+    this.handler = function(stream, code_point) {
+      // 1. If code point is end-of-stream and iso-2022-jp encoder
+      // state is not ASCII, prepend code point to stream, set
+      // iso-2022-jp encoder state to ASCII, and return three bytes
+      // 0x1B 0x28 0x42.
+      if (code_point === end_of_stream &&
+          iso2022jp_state !== states.ASCII) {
+        stream.prepend(code_point);
+        iso2022jp_state = states.ASCII;
+        return [0x1B, 0x28, 0x42];
+      }
+
+      // 2. If code point is end-of-stream and iso-2022-jp encoder
+      // state is ASCII, return finished.
+      if (code_point === end_of_stream && iso2022jp_state === states.ASCII)
+        return finished;
+
+      // 3. If ISO-2022-JP encoder state is ASCII or Roman, and code
+      // point is U+000E, U+000F, or U+001B, return error with U+FFFD.
+      if ((iso2022jp_state === states.ASCII ||
+           iso2022jp_state === states.Roman) &&
+          (code_point === 0x000E || code_point === 0x000F ||
+           code_point === 0x001B)) {
+        return encoderError(0xFFFD);
+      }
+
+      // 4. If iso-2022-jp encoder state is ASCII and code point is an
+      // ASCII code point, return a byte whose value is code point.
+      if (iso2022jp_state === states.ASCII &&
+          isASCIICodePoint(code_point))
+        return code_point;
+
+      // 5. If iso-2022-jp encoder state is Roman and code point is an
+      // ASCII code point, excluding U+005C and U+007E, or is U+00A5
+      // or U+203E, run these substeps:
+      if (iso2022jp_state === states.Roman &&
+          ((isASCIICodePoint(code_point) &&
+           code_point !== 0x005C && code_point !== 0x007E) ||
+          (code_point == 0x00A5 || code_point == 0x203E))) {
+
+        // 1. If code point is an ASCII code point, return a byte
+        // whose value is code point.
+        if (isASCIICodePoint(code_point))
+          return code_point;
+
+        // 2. If code point is U+00A5, return byte 0x5C.
+        if (code_point === 0x00A5)
+          return 0x5C;
+
+        // 3. If code point is U+203E, return byte 0x7E.
+        if (code_point === 0x203E)
+          return 0x7E;
+      }
+
+      // 6. If code point is an ASCII code point, and iso-2022-jp
+      // encoder state is not ASCII, prepend code point to stream, set
+      // iso-2022-jp encoder state to ASCII, and return three bytes
+      // 0x1B 0x28 0x42.
+      if (isASCIICodePoint(code_point) &&
+          iso2022jp_state !== states.ASCII) {
+        stream.prepend(code_point);
+        iso2022jp_state = states.ASCII;
+        return [0x1B, 0x28, 0x42];
+      }
+
+      // 7. If code point is either U+00A5 or U+203E, and iso-2022-jp
+      // encoder state is not Roman, prepend code point to stream, set
+      // iso-2022-jp encoder state to Roman, and return three bytes
+      // 0x1B 0x28 0x4A.
+      if ((code_point === 0x00A5 || code_point === 0x203E) &&
+          iso2022jp_state !== states.Roman) {
+        stream.prepend(code_point);
+        iso2022jp_state = states.Roman;
+        return [0x1B, 0x28, 0x4A];
+      }
+
+      // 8. If code point is U+2212, set it to U+FF0D.
+      if (code_point === 0x2212)
+        code_point = 0xFF0D;
+
+      // 9. Let pointer be the index pointer for code point in index
+      // jis0208.
+      var pointer = indexPointerFor(code_point, index('jis0208'));
+
+      // 10. If pointer is null, return error with code point.
+      if (pointer === null)
+        return encoderError(code_point);
+
+      // 11. If iso-2022-jp encoder state is not jis0208, prepend code
+      // point to stream, set iso-2022-jp encoder state to jis0208,
+      // and return three bytes 0x1B 0x24 0x42.
+      if (iso2022jp_state !== states.jis0208) {
+        stream.prepend(code_point);
+        iso2022jp_state = states.jis0208;
+        return [0x1B, 0x24, 0x42];
+      }
+
+      // 12. Let lead be floor(pointer / 94) + 0x21.
+      var lead = floor(pointer / 94) + 0x21;
+
+      // 13. Let trail be pointer % 94 + 0x21.
+      var trail = pointer % 94 + 0x21;
+
+      // 14. Return two bytes whose values are lead and trail.
+      return [lead, trail];
+    };
+  }
+
+  /** @param {{fatal: boolean}} options */
+  encoders['ISO-2022-JP'] = function(options) {
+    return new ISO2022JPEncoder(options);
+  };
+  /** @param {{fatal: boolean}} options */
+  decoders['ISO-2022-JP'] = function(options) {
+    return new ISO2022JPDecoder(options);
+  };
+
+  // 13.3 Shift_JIS
+
+  // 13.3.1 Shift_JIS decoder
+  /**
+   * @constructor
+   * @implements {Decoder}
+   * @param {{fatal: boolean}} options
+   */
+  function ShiftJISDecoder(options) {
+    var fatal = options.fatal;
+    // Shift_JIS's decoder has an associated Shift_JIS lead (initially
+    // 0x00).
+    var /** @type {number} */ Shift_JIS_lead = 0x00;
+    /**
+     * @param {Stream} stream The stream of bytes being decoded.
+     * @param {number} bite The next byte read from the stream.
+     * @return {?(number|!Array.<number>)} The next code point(s)
+     *     decoded, or null if not enough data exists in the input
+     *     stream to decode a complete code point.
+     */
+    this.handler = function(stream, bite) {
+      // 1. If byte is end-of-stream and Shift_JIS lead is not 0x00,
+      // set Shift_JIS lead to 0x00 and return error.
+      if (bite === end_of_stream && Shift_JIS_lead !== 0x00) {
+        Shift_JIS_lead = 0x00;
+        return decoderError(fatal);
+      }
+
+      // 2. If byte is end-of-stream and Shift_JIS lead is 0x00,
+      // return finished.
+      if (bite === end_of_stream && Shift_JIS_lead === 0x00)
+        return finished;
+
+      // 3. If Shift_JIS lead is not 0x00, let lead be Shift_JIS lead,
+      // let pointer be null, set Shift_JIS lead to 0x00, and then run
+      // these substeps:
+      if (Shift_JIS_lead !== 0x00) {
+        var lead = Shift_JIS_lead;
+        var pointer = null;
+        Shift_JIS_lead = 0x00;
+
+        // 1. Let offset be 0x40, if byte is less than 0x7F, and 0x41
+        // otherwise.
+        var offset = (bite < 0x7F) ? 0x40 : 0x41;
+
+        // 2. Let lead offset be 0x81, if lead is less than 0xA0, and
+        // 0xC1 otherwise.
+        var lead_offset = (lead < 0xA0) ? 0x81 : 0xC1;
+
+        // 3. If byte is in the range 0x40 to 0x7E, inclusive, or 0x80
+        // to 0xFC, inclusive, set pointer to (lead − lead offset) ×
+        // 188 + byte − offset.
+        if (inRange(bite, 0x40, 0x7E) || inRange(bite, 0x80, 0xFC))
+          pointer = (lead - lead_offset) * 188 + bite - offset;
+
+        // 4. If pointer is in the range 8836 to 10715, inclusive,
+        // return a code point whose value is 0xE000 − 8836 + pointer.
+        if (inRange(pointer, 8836, 10715))
+          return 0xE000 - 8836 + pointer;
+
+        // 5. Let code point be null, if pointer is null, and the
+        // index code point for pointer in index jis0208 otherwise.
+        var code_point = (pointer === null) ? null :
+              indexCodePointFor(pointer, index('jis0208'));
+
+        // 6. If code point is null and byte is an ASCII byte, prepend
+        // byte to stream.
+        if (code_point === null && isASCIIByte(bite))
+          stream.prepend(bite);
+
+        // 7. If code point is null, return error.
+        if (code_point === null)
+          return decoderError(fatal);
+
+        // 8. Return a code point whose value is code point.
+        return code_point;
+      }
+
+      // 4. If byte is an ASCII byte or 0x80, return a code point
+      // whose value is byte.
+      if (isASCIIByte(bite) || bite === 0x80)
+        return bite;
+
+      // 5. If byte is in the range 0xA1 to 0xDF, inclusive, return a
+      // code point whose value is 0xFF61 − 0xA1 + byte.
+      if (inRange(bite, 0xA1, 0xDF))
+        return 0xFF61 - 0xA1 + bite;
+
+      // 6. If byte is in the range 0x81 to 0x9F, inclusive, or 0xE0
+      // to 0xFC, inclusive, set Shift_JIS lead to byte and return
+      // continue.
+      if (inRange(bite, 0x81, 0x9F) || inRange(bite, 0xE0, 0xFC)) {
+        Shift_JIS_lead = bite;
+        return null;
+      }
+
+      // 7. Return error.
+      return decoderError(fatal);
+    };
+  }
+
+  // 13.3.2 Shift_JIS encoder
+  /**
+   * @constructor
+   * @implements {Encoder}
+   * @param {{fatal: boolean}} options
+   */
+  function ShiftJISEncoder(options) {
+    var fatal = options.fatal;
+    /**
+     * @param {Stream} stream Input stream.
+     * @param {number} code_point Next code point read from the stream.
+     * @return {(number|!Array.<number>)} Byte(s) to emit.
+     */
+    this.handler = function(stream, code_point) {
+      // 1. If code point is end-of-stream, return finished.
+      if (code_point === end_of_stream)
+        return finished;
+
+      // 2. If code point is an ASCII code point or U+0080, return a
+      // byte whose value is code point.
+      if (isASCIICodePoint(code_point) || code_point === 0x0080)
+        return code_point;
+
+      // 3. If code point is U+00A5, return byte 0x5C.
+      if (code_point === 0x00A5)
+        return 0x5C;
+
+      // 4. If code point is U+203E, return byte 0x7E.
+      if (code_point === 0x203E)
+        return 0x7E;
+
+      // 5. If code point is in the range U+FF61 to U+FF9F, inclusive,
+      // return a byte whose value is code point − 0xFF61 + 0xA1.
+      if (inRange(code_point, 0xFF61, 0xFF9F))
+        return code_point - 0xFF61 + 0xA1;
+
+      // 6. If code point is U+2212, set it to U+FF0D.
+      if (code_point === 0x2212)
+        code_point = 0xFF0D;
+
+      // 7. Let pointer be the index Shift_JIS pointer for code point.
+      var pointer = indexShiftJISPointerFor(code_point);
+
+      // 8. If pointer is null, return error with code point.
+      if (pointer === null)
+        return encoderError(code_point);
+
+      // 9. Let lead be floor(pointer / 188).
+      var lead = floor(pointer / 188);
+
+      // 10. Let lead offset be 0x81, if lead is less than 0x1F, and
+      // 0xC1 otherwise.
+      var lead_offset = (lead < 0x1F) ? 0x81 : 0xC1;
+
+      // 11. Let trail be pointer % 188.
+      var trail = pointer % 188;
+
+      // 12. Let offset be 0x40, if trail is less than 0x3F, and 0x41
+      // otherwise.
+      var offset = (trail < 0x3F) ? 0x40 : 0x41;
+
+      // 13. Return two bytes whose values are lead + lead offset and
+      // trail + offset.
+      return [lead + lead_offset, trail + offset];
+    };
+  }
+
+  /** @param {{fatal: boolean}} options */
+  encoders['Shift_JIS'] = function(options) {
+    return new ShiftJISEncoder(options);
+  };
+  /** @param {{fatal: boolean}} options */
+  decoders['Shift_JIS'] = function(options) {
+    return new ShiftJISDecoder(options);
+  };
+
+  //
+  // 14. Legacy multi-byte Korean encodings
+  //
+
+  // 14.1 euc-kr
+
+  // 14.1.1 euc-kr decoder
+  /**
+   * @constructor
+   * @implements {Decoder}
+   * @param {{fatal: boolean}} options
+   */
+  function EUCKRDecoder(options) {
+    var fatal = options.fatal;
+
+    // euc-kr's decoder has an associated euc-kr lead (initially 0x00).
+    var /** @type {number} */ euckr_lead = 0x00;
+    /**
+     * @param {Stream} stream The stream of bytes being decoded.
+     * @param {number} bite The next byte read from the stream.
+     * @return {?(number|!Array.<number>)} The next code point(s)
+     *     decoded, or null if not enough data exists in the input
+     *     stream to decode a complete code point.
+     */
+    this.handler = function(stream, bite) {
+      // 1. If byte is end-of-stream and euc-kr lead is not 0x00, set
+      // euc-kr lead to 0x00 and return error.
+      if (bite === end_of_stream && euckr_lead !== 0) {
+        euckr_lead = 0x00;
+        return decoderError(fatal);
+      }
+
+      // 2. If byte is end-of-stream and euc-kr lead is 0x00, return
+      // finished.
+      if (bite === end_of_stream && euckr_lead === 0)
+        return finished;
+
+      // 3. If euc-kr lead is not 0x00, let lead be euc-kr lead, let
+      // pointer be null, set euc-kr lead to 0x00, and then run these
+      // substeps:
+      if (euckr_lead !== 0x00) {
+        var lead = euckr_lead;
+        var pointer = null;
+        euckr_lead = 0x00;
+
+        // 1. If byte is in the range 0x41 to 0xFE, inclusive, set
+        // pointer to (lead − 0x81) × 190 + (byte − 0x41).
+        if (inRange(bite, 0x41, 0xFE))
+          pointer = (lead - 0x81) * 190 + (bite - 0x41);
+
+        // 2. Let code point be null, if pointer is null, and the
+        // index code point for pointer in index euc-kr otherwise.
+        var code_point = (pointer === null)
+              ? null : indexCodePointFor(pointer, index('euc-kr'));
+
+        // 3. If code point is null and byte is an ASCII byte, prepend
+        // byte to stream.
+        if (pointer === null && isASCIIByte(bite))
+          stream.prepend(bite);
+
+        // 4. If code point is null, return error.
+        if (code_point === null)
+          return decoderError(fatal);
+
+        // 5. Return a code point whose value is code point.
+        return code_point;
+      }
+
+      // 4. If byte is an ASCII byte, return a code point whose value
+      // is byte.
+      if (isASCIIByte(bite))
+        return bite;
+
+      // 5. If byte is in the range 0x81 to 0xFE, inclusive, set
+      // euc-kr lead to byte and return continue.
+      if (inRange(bite, 0x81, 0xFE)) {
+        euckr_lead = bite;
+        return null;
+      }
+
+      // 6. Return error.
+      return decoderError(fatal);
+    };
+  }
+
+  // 14.1.2 euc-kr encoder
+  /**
+   * @constructor
+   * @implements {Encoder}
+   * @param {{fatal: boolean}} options
+   */
+  function EUCKREncoder(options) {
+    var fatal = options.fatal;
+    /**
+     * @param {Stream} stream Input stream.
+     * @param {number} code_point Next code point read from the stream.
+     * @return {(number|!Array.<number>)} Byte(s) to emit.
+     */
+    this.handler = function(stream, code_point) {
+      // 1. If code point is end-of-stream, return finished.
+      if (code_point === end_of_stream)
+        return finished;
+
+      // 2. If code point is an ASCII code point, return a byte whose
+      // value is code point.
+      if (isASCIICodePoint(code_point))
+        return code_point;
+
+      // 3. Let pointer be the index pointer for code point in index
+      // euc-kr.
+      var pointer = indexPointerFor(code_point, index('euc-kr'));
+
+      // 4. If pointer is null, return error with code point.
+      if (pointer === null)
+        return encoderError(code_point);
+
+      // 5. Let lead be floor(pointer / 190) + 0x81.
+      var lead = floor(pointer / 190) + 0x81;
+
+      // 6. Let trail be pointer % 190 + 0x41.
+      var trail = (pointer % 190) + 0x41;
+
+      // 7. Return two bytes whose values are lead and trail.
+      return [lead, trail];
+    };
+  }
+
+  /** @param {{fatal: boolean}} options */
+  encoders['EUC-KR'] = function(options) {
+    return new EUCKREncoder(options);
+  };
+  /** @param {{fatal: boolean}} options */
+  decoders['EUC-KR'] = function(options) {
+    return new EUCKRDecoder(options);
+  };
+
+
+  //
+  // 15. Legacy miscellaneous encodings
+  //
+
+  // 15.1 replacement
+
+  // Not needed - API throws RangeError
+
+  // 15.2 Common infrastructure for utf-16be and utf-16le
+
+  /**
+   * @param {number} code_unit
+   * @param {boolean} utf16be
+   * @return {!Array.<number>} bytes
+   */
+  function convertCodeUnitToBytes(code_unit, utf16be) {
+    // 1. Let byte1 be code unit >> 8.
+    var byte1 = code_unit >> 8;
+
+    // 2. Let byte2 be code unit & 0x00FF.
+    var byte2 = code_unit & 0x00FF;
+
+    // 3. Then return the bytes in order:
+        // utf-16be flag is set: byte1, then byte2.
+    if (utf16be)
+      return [byte1, byte2];
+    // utf-16be flag is unset: byte2, then byte1.
+    return [byte2, byte1];
+  }
+
+  // 15.2.1 shared utf-16 decoder
+  /**
+   * @constructor
+   * @implements {Decoder}
+   * @param {boolean} utf16_be True if big-endian, false if little-endian.
+   * @param {{fatal: boolean}} options
+   */
+  function UTF16Decoder(utf16_be, options) {
+    var fatal = options.fatal;
+    var /** @type {?number} */ utf16_lead_byte = null,
+        /** @type {?number} */ utf16_lead_surrogate = null;
+    /**
+     * @param {Stream} stream The stream of bytes being decoded.
+     * @param {number} bite The next byte read from the stream.
+     * @return {?(number|!Array.<number>)} The next code point(s)
+     *     decoded, or null if not enough data exists in the input
+     *     stream to decode a complete code point.
+     */
+    this.handler = function(stream, bite) {
+      // 1. If byte is end-of-stream and either utf-16 lead byte or
+      // utf-16 lead surrogate is not null, set utf-16 lead byte and
+      // utf-16 lead surrogate to null, and return error.
+      if (bite === end_of_stream && (utf16_lead_byte !== null ||
+                                utf16_lead_surrogate !== null)) {
+        return decoderError(fatal);
+      }
+
+      // 2. If byte is end-of-stream and utf-16 lead byte and utf-16
+      // lead surrogate are null, return finished.
+      if (bite === end_of_stream && utf16_lead_byte === null &&
+          utf16_lead_surrogate === null) {
+        return finished;
+      }
+
+      // 3. If utf-16 lead byte is null, set utf-16 lead byte to byte
+      // and return continue.
+      if (utf16_lead_byte === null) {
+        utf16_lead_byte = bite;
+        return null;
+      }
+
+      // 4. Let code unit be the result of:
+      var code_unit;
+      if (utf16_be) {
+        // utf-16be decoder flag is set
+        //   (utf-16 lead byte << 8) + byte.
+        code_unit = (utf16_lead_byte << 8) + bite;
+      } else {
+        // utf-16be decoder flag is unset
+        //   (byte << 8) + utf-16 lead byte.
+        code_unit = (bite << 8) + utf16_lead_byte;
+      }
+      // Then set utf-16 lead byte to null.
+      utf16_lead_byte = null;
+
+      // 5. If utf-16 lead surrogate is not null, let lead surrogate
+      // be utf-16 lead surrogate, set utf-16 lead surrogate to null,
+      // and then run these substeps:
+      if (utf16_lead_surrogate !== null) {
+        var lead_surrogate = utf16_lead_surrogate;
+        utf16_lead_surrogate = null;
+
+        // 1. If code unit is in the range U+DC00 to U+DFFF,
+        // inclusive, return a code point whose value is 0x10000 +
+        // ((lead surrogate − 0xD800) << 10) + (code unit − 0xDC00).
+        if (inRange(code_unit, 0xDC00, 0xDFFF)) {
+          return 0x10000 + (lead_surrogate - 0xD800) * 0x400 +
+              (code_unit - 0xDC00);
+        }
+
+        // 2. Prepend the sequence resulting of converting code unit
+        // to bytes using utf-16be decoder flag to stream and return
+        // error.
+        stream.prepend(convertCodeUnitToBytes(code_unit, utf16_be));
+        return decoderError(fatal);
+      }
+
+      // 6. If code unit is in the range U+D800 to U+DBFF, inclusive,
+      // set utf-16 lead surrogate to code unit and return continue.
+      if (inRange(code_unit, 0xD800, 0xDBFF)) {
+        utf16_lead_surrogate = code_unit;
+        return null;
+      }
+
+      // 7. If code unit is in the range U+DC00 to U+DFFF, inclusive,
+      // return error.
+      if (inRange(code_unit, 0xDC00, 0xDFFF))
+        return decoderError(fatal);
+
+      // 8. Return code point code unit.
+      return code_unit;
+    };
+  }
+
+  // 15.2.2 shared utf-16 encoder
+  /**
+   * @constructor
+   * @implements {Encoder}
+   * @param {boolean} utf16_be True if big-endian, false if little-endian.
+   * @param {{fatal: boolean}} options
+   */
+  function UTF16Encoder(utf16_be, options) {
+    var fatal = options.fatal;
+    /**
+     * @param {Stream} stream Input stream.
+     * @param {number} code_point Next code point read from the stream.
+     * @return {(number|!Array.<number>)} Byte(s) to emit.
+     */
+    this.handler = function(stream, code_point) {
+      // 1. If code point is end-of-stream, return finished.
+      if (code_point === end_of_stream)
+        return finished;
+
+      // 2. If code point is in the range U+0000 to U+FFFF, inclusive,
+      // return the sequence resulting of converting code point to
+      // bytes using utf-16be encoder flag.
+      if (inRange(code_point, 0x0000, 0xFFFF))
+        return convertCodeUnitToBytes(code_point, utf16_be);
+
+      // 3. Let lead be ((code point − 0x10000) >> 10) + 0xD800,
+      // converted to bytes using utf-16be encoder flag.
+      var lead = convertCodeUnitToBytes(
+        ((code_point - 0x10000) >> 10) + 0xD800, utf16_be);
+
+      // 4. Let trail be ((code point − 0x10000) & 0x3FF) + 0xDC00,
+      // converted to bytes using utf-16be encoder flag.
+      var trail = convertCodeUnitToBytes(
+        ((code_point - 0x10000) & 0x3FF) + 0xDC00, utf16_be);
+
+      // 5. Return a byte sequence of lead followed by trail.
+      return lead.concat(trail);
+    };
+  }
+
+  // 15.3 utf-16be
+  // 15.3.1 utf-16be decoder
+  /** @param {{fatal: boolean}} options */
+  encoders['UTF-16BE'] = function(options) {
+    return new UTF16Encoder(true, options);
+  };
+  // 15.3.2 utf-16be encoder
+  /** @param {{fatal: boolean}} options */
+  decoders['UTF-16BE'] = function(options) {
+    return new UTF16Decoder(true, options);
+  };
+
+  // 15.4 utf-16le
+  // 15.4.1 utf-16le decoder
+  /** @param {{fatal: boolean}} options */
+  encoders['UTF-16LE'] = function(options) {
+    return new UTF16Encoder(false, options);
+  };
+  // 15.4.2 utf-16le encoder
+  /** @param {{fatal: boolean}} options */
+  decoders['UTF-16LE'] = function(options) {
+    return new UTF16Decoder(false, options);
+  };
+
+  // 15.5 x-user-defined
+
+  // 15.5.1 x-user-defined decoder
+  /**
+   * @constructor
+   * @implements {Decoder}
+   * @param {{fatal: boolean}} options
+   */
+  function XUserDefinedDecoder(options) {
+    var fatal = options.fatal;
+    /**
+     * @param {Stream} stream The stream of bytes being decoded.
+     * @param {number} bite The next byte read from the stream.
+     * @return {?(number|!Array.<number>)} The next code point(s)
+     *     decoded, or null if not enough data exists in the input
+     *     stream to decode a complete code point.
+     */
+    this.handler = function(stream, bite) {
+      // 1. If byte is end-of-stream, return finished.
+      if (bite === end_of_stream)
+        return finished;
+
+      // 2. If byte is an ASCII byte, return a code point whose value
+      // is byte.
+      if (isASCIIByte(bite))
+        return bite;
+
+      // 3. Return a code point whose value is 0xF780 + byte − 0x80.
+      return 0xF780 + bite - 0x80;
+    };
+  }
+
+  // 15.5.2 x-user-defined encoder
+  /**
+   * @constructor
+   * @implements {Encoder}
+   * @param {{fatal: boolean}} options
+   */
+  function XUserDefinedEncoder(options) {
+    var fatal = options.fatal;
+    /**
+     * @param {Stream} stream Input stream.
+     * @param {number} code_point Next code point read from the stream.
+     * @return {(number|!Array.<number>)} Byte(s) to emit.
+     */
+    this.handler = function(stream, code_point) {
+      // 1.If code point is end-of-stream, return finished.
+      if (code_point === end_of_stream)
+        return finished;
+
+      // 2. If code point is an ASCII code point, return a byte whose
+      // value is code point.
+      if (isASCIICodePoint(code_point))
+        return code_point;
+
+      // 3. If code point is in the range U+F780 to U+F7FF, inclusive,
+      // return a byte whose value is code point − 0xF780 + 0x80.
+      if (inRange(code_point, 0xF780, 0xF7FF))
+        return code_point - 0xF780 + 0x80;
+
+      // 4. Return error with code point.
+      return encoderError(code_point);
+    };
+  }
+
+  /** @param {{fatal: boolean}} options */
+  encoders['x-user-defined'] = function(options) {
+    return new XUserDefinedEncoder(options);
+  };
+  /** @param {{fatal: boolean}} options */
+  decoders['x-user-defined'] = function(options) {
+    return new XUserDefinedDecoder(options);
+  };
+
+  if (!global['TextEncoder'])
+    global['TextEncoder'] = TextEncoder;
+  if (!global['TextDecoder'])
+    global['TextDecoder'] = TextDecoder;
+
+  if (typeof module !== "undefined" && module.exports) {
+    module.exports = {
+      TextEncoder: global['TextEncoder'],
+      TextDecoder: global['TextDecoder'],
+      EncodingIndexes: global["encoding-indexes"]
+    };
+  }
+
+// For strict environments where `this` inside the global scope
+// is `undefined`, take a pure object instead
+}(this || {}));

+ 313 - 0
components/kk-printer/printer/esc.js

@@ -0,0 +1,313 @@
+var encode = require("./encoding.js")
+var jpPrinter = {
+	createNew: function() {
+		var jpPrinter = {};
+		var data = [];
+
+		var bar = ["UPC-A", "UPC-E", "EAN13", "EAN8", "CODE39", "ITF", "CODABAR", "CODE93", "CODE128"];
+
+		jpPrinter.name = "账单模式";
+
+		jpPrinter.init = function() { //初始化打印机
+			data.push(27)
+			data.push(64)
+		};
+
+		jpPrinter.setText = function(content) { //设置文本内容
+			var code = new encode.TextEncoder(
+				'gb18030', {
+					NONSTANDARD_allowLegacyEncoding: true
+				}).encode(content)
+			for (var i = 0; i < code.length; ++i) {
+				data.push(code[i])
+			}
+		}
+
+		jpPrinter.setBarcodeWidth = function(width) { //设置条码宽度
+			data.push(29)
+			data.push(119)
+			if (width > 6) {
+				width = 6;
+			}
+			if (width < 2) {
+				width = 1;
+			}
+			data.push(width)
+		}
+
+		jpPrinter.setBarcodeHeight = function(height) { //设置条码高度
+			data.push(29)
+			data.push(104)
+			data.push(height)
+		}
+
+		jpPrinter.setBarcodeContent = function(t, content) {
+			var ty = 73;
+			data.push(29)
+			data.push(107)
+			switch (t) {
+				case bar[0]:
+					ty = 65;
+					break;
+				case bar[1]:
+					ty = 66;
+					break;
+				case bar[2]:
+					ty = 67;
+					break;
+				case bar[3]:
+					ty = 68;
+					break;
+				case bar[4]:
+					ty = 69;
+					break;
+				case bar[5]:
+					ty = 70;
+					break;
+				case bar[6]:
+					ty = 71;
+					break;
+				case bar[7]:
+					ty = 72;
+					break;
+				case bar[8]:
+					ty = 73;
+					break;
+			}
+			data.push(ty)
+		}
+
+		jpPrinter.setSelectSizeOfModuleForQRCode = function(n) { //设置二维码大小
+			data.push(29)
+			data.push(40)
+			data.push(107)
+			data.push(3)
+			data.push(0)
+			data.push(49)
+			data.push(67)
+			if (n > 15) {
+				n = 15
+			}
+			if (n < 1) {
+				n = 1
+			}
+			data.push(n)
+		}
+
+		jpPrinter.setSelectErrorCorrectionLevelForQRCode = function(n) { //设置纠错等级
+			/*
+			n      功能      纠错能力
+			48 选择纠错等级 L 7
+			49 选择纠错等级 M 15
+			50 选择纠错等级 Q 25
+			51 选择纠错等级 H 30
+			*/
+			data.push(29)
+			data.push(40)
+			data.push(107)
+			data.push(3)
+			data.push(0)
+			data.push(49)
+			data.push(69)
+			data.push(n)
+		}
+
+		jpPrinter.setStoreQRCodeData = function(content) { //设置二维码内容
+			var code = new encode.TextEncoder(
+				'gb18030', {
+					NONSTANDARD_allowLegacyEncoding: true
+				}).encode(content)
+			data.push(29)
+			data.push(40)
+			data.push(107)
+			data.push(parseInt((code.length + 3) % 256))
+			data.push(parseInt((code.length + 3) / 256))
+			data.push(49)
+			data.push(80)
+			data.push(48)
+
+			for (var i = 0; i < code.length; ++i) {
+				data.push(code[i])
+			}
+		}
+
+		jpPrinter.setPrintQRCode = function() { //打印二维码
+			data.push(29)
+			data.push(40)
+			data.push(107)
+			data.push(3)
+			data.push(0)
+			data.push(49)
+			data.push(81)
+			data.push(48)
+		}
+
+		jpPrinter.setHorTab = function() { //移动打印位置到下一个水平定位点的位置
+			data.push(9)
+		}
+
+		jpPrinter.setAbsolutePrintPosition = function(where) { //设置绝对打印位置
+			data.push(27)
+			data.push(36)
+			data.push(parseInt(where % 256))
+			data.push(parseInt(where / 256))
+		}
+
+		jpPrinter.setRelativePrintPositon = function(where) { //设置相对横向打印位置
+			data.push(27)
+			data.push(92)
+			data.push(parseInt(where % 256))
+			data.push(parseInt(where / 256))
+		}
+
+		jpPrinter.setSelectJustification = function(which) { //对齐方式
+			/*
+			0, 48 左对齐
+			1, 49 中间对齐
+			2, 50 右对齐
+			*/
+			data.push(27)
+			data.push(97)
+			data.push(which)
+		}
+
+		jpPrinter.setLeftMargin = function(n) { //设置左边距
+			data.push(29)
+			data.push(76)
+			data.push(parseInt(n % 256))
+			data.push(parseInt(n / 256))
+		}
+
+		jpPrinter.setPrintingAreaWidth = function(width) { //设置打印区域宽度
+			data.push(29)
+			data.push(87)
+			data.push(parseInt(width % 256))
+			data.push(parseInt(width / 256))
+		}
+
+		jpPrinter.setSound = function(n, t) { //设置蜂鸣器
+			data.push(27)
+			data.push(66)
+			if (n < 0) {
+				n = 1;
+			} else if (n > 9) {
+				n = 9;
+			}
+
+			if (t < 0) {
+				t = 1;
+			} else if (t > 9) {
+				t = 9;
+			}
+			data.push(n)
+			data.push(t)
+		}
+
+		jpPrinter.setBitmap = function(res) { //参数,画布的参数
+			console.log(res)
+			var width = parseInt((res.width + 7) / 8 * 8 / 8)
+			var height = res.height;
+			var time = 1;
+			var temp = res.data.length - width * 32;
+			var point_list = []
+			console.log(width + "--" + height)
+			data.push(29)
+			data.push(118)
+			data.push(48)
+			data.push(0)
+			data.push((parseInt((res.width + 7) / 8) * 8) / 8)
+			data.push(0)
+			data.push(parseInt(res.height % 256))
+			data.push(parseInt(res.height / 256))
+			console.log(res.data.length)
+			console.log("temp=" + temp)
+			for (var i = 0; i < height; ++i) {
+				for (var j = 0; j < width; ++j) {
+					for (var k = 0; k < 32; k += 4) {
+						var po = {}
+						if (res.data[temp] == 0 && res.data[temp + 1] == 0 && res.data[temp + 2] == 0 && res
+							.data[temp + 3] == 0) {
+							po.point = 0;
+						} else {
+							po.point = 1;
+						}
+						point_list.push(po)
+						temp += 4
+					}
+				}
+				time++
+				temp = res.data.length - width * 32 * time
+			}
+			for (var i = 0; i < point_list.length; i += 8) {
+				var p = point_list[i].point * 128 + point_list[i + 1].point * 64 + point_list[i + 2].point *
+					32 + point_list[i + 3].point * 16 + point_list[i + 4].point * 8 + point_list[i + 5]
+					.point * 4 + point_list[i + 6].point * 2 + point_list[i + 7].point
+				data.push(p)
+			}
+		}
+
+		jpPrinter.setPrint = function() { //打印并换行
+			data.push(10)
+		}
+
+		jpPrinter.setPrintAndFeed = function(feed) { //打印并走纸feed个单位
+			data.push(27)
+			data.push(74)
+			data.push(feed)
+		}
+
+		jpPrinter.setPrintAndFeedRow = function(row) { //打印并走纸row行
+			data.push(27)
+			data.push(100)
+			data.push(row)
+		}
+
+		jpPrinter.getData = function() { //获取打印数据
+			return data;
+		};
+
+
+		return jpPrinter;
+	},
+
+	Query: function() {
+		var queryStatus = {};
+		var buf;
+		var dateView;
+		queryStatus.getRealtimeStatusTransmission = function(n) { //查询打印机实时状态
+			/*
+			n = 1:传送打印机状态
+			n = 2:传送脱机状态
+			n = 3:传送错误状态
+			n = 4:传送纸传感器状态
+			*/
+			buf = new ArrayBuffer(3)
+			dateView = new DataView(buf)
+			dateView.setUint8(0, 16)
+			dateView.setUint8(1, 4)
+			dateView.setUint8(2, n)
+			queryStatus.query(buf)
+		}
+
+		queryStatus.query = function(buf) {
+			wx.writeBLECharacteristicValue({
+				deviceId: app.BLEInformation.deviceId,
+				serviceId: app.BLEInformation.writeServiceId,
+				characteristicId: app.BLEInformation.writeCharaterId,
+				value: buf,
+				success: function(res) {
+
+				},
+				complete: function(res) {
+					console.log(res)
+					buf = null
+					dateView = null;
+				}
+			})
+		}
+		return queryStatus;
+	}
+
+};
+
+module.exports.jpPrinter = jpPrinter;

+ 388 - 0
components/kk-printer/printer/tsc.js

@@ -0,0 +1,388 @@
+/**
+ * tsc 命令打印工具类
+ * 2021.04.26 uni-app版本
+ * @auth boolTrue
+ */
+var encode = require("./encoding.js");
+var jpPrinter = {
+	createNew: function() {
+		var jpPrinter = {};
+		var data = "";
+		var command = []
+		var rawCommand = ''
+
+		jpPrinter.name = "标签模式";
+
+		jpPrinter.init = function() {};
+
+		jpPrinter.addCommand = function(content) { //将指令转成数组装起
+			//#ifdef MP-WEIXIN
+			var code = new encode.TextEncoder(
+				'gb18030', {
+					NONSTANDARD_allowLegacyEncoding: true
+				}).encode(content)
+			for (var i = 0; i < code.length; ++i) {
+				command.push(code[i])
+			}
+			//#endif
+			
+			//#ifdef APP-PLUS
+			let byteCommand = plus.android.invoke(content, 'getBytes', 'gb18030');
+			for (var i = 0; i < byteCommand.length; ++i) {
+			  command.push(byteCommand[i])
+			}
+			//#endif
+			
+			//console.log('command--:',command)
+			rawCommand += content
+		}
+		
+		function intToByte(i) {
+			// 此处关键 -- android是java平台 byte数值范围是 [-128, 127]
+			// 因为java平台的byte类型是有符号的 最高位表示符号,所以数值范围固定
+			// 而图片计算出来的是数值是 0 -255 属于int类型
+			// 所以把int 转换成byte类型 
+			//#ifdef APP-PLUS
+				var b = i & 0xFF;
+				var c = 0;
+				if (b >= 128) {
+					c = b % 128;
+					c = -1 * (128 - c);
+				} else {
+					c = b;
+				}
+				return c
+			//#endif
+			// 而微信小程序不需要,因为小程序api接收的是 无符号8位
+			//#ifdef MP-WEIXIN
+				return i
+			//#endif
+		}
+
+		jpPrinter.setSize = function(pageWidght, pageHeight) { //设置页面大小
+			data = "SIZE " + pageWidght.toString() + " mm" + "," + pageHeight.toString() + " mm" + "\r\n";
+			jpPrinter.addCommand(data)
+		};
+
+		jpPrinter.setSpeed = function(printSpeed) { //设置打印机速度
+			data = "SPEED " + printSpeed.toString() + "\r\n";
+			jpPrinter.addCommand(data)
+		};
+
+		jpPrinter.setDensity = function(printDensity) { //设置打印机浓度
+			data = "DENSITY " + printDensity.toString() + "\r\n";
+			jpPrinter.addCommand(data)
+		};
+
+		jpPrinter.setGap = function(printGap) { //传感器
+			data = "GAP " + printGap.toString() + " mm\r\n";
+			jpPrinter.addCommand(data)
+		};
+
+		jpPrinter.setCountry = function(country) { //选择国际字符集
+			/*
+			001:USA
+			002:French
+			003:Latin America
+			034:Spanish
+			039:Italian
+			044:United Kingdom
+			046:Swedish
+			047:Norwegian
+			049:German
+			 */
+			data = "COUNTRY " + country + "\r\n";
+			jpPrinter.addCommand(data)
+		};
+
+		jpPrinter.setCodepage = function(codepage) { //选择国际代码页
+			/*
+			8-bit codepage 字符集代表
+			437:United States
+			850:Multilingual
+			852:Slavic
+			860:Portuguese
+			863:Canadian/French
+			865:Nordic
+			Windows code page
+			1250:Central Europe
+			1252:Latin I
+			1253:Greek
+			1254:Turkish
+			以下代码页仅限于 12×24 dot 英数字体
+			WestEurope:WestEurope
+			Greek:Greek
+			Hebrew:Hebrew
+			EastEurope:EastEurope
+			Iran:Iran
+			IranII:IranII
+			Latvian:Latvian
+			Arabic:Arabic
+			Vietnam:Vietnam
+			Uygur:Uygur
+			Thai:Thai
+			1252:Latin I
+			1257:WPC1257
+			1251:WPC1251
+			866:Cyrillic
+			858:PC858
+			747:PC747
+			864:PC864
+			1001:PC100
+			*/
+			data = "CODEPAGE " + codepage + "\r\n";
+			jpPrinter.addCommand(data)
+		}
+
+		jpPrinter.setCls = function() { //清除打印机缓存
+			data = "CLS" + "\r\n";
+			jpPrinter.addCommand(data)
+		};
+
+		jpPrinter.setFeed = function(feed) { //将纸向前推出n
+			data = "FEED " + feed + "\r\n";
+			jpPrinter.addCommand(data)
+		};
+
+		jpPrinter.setBackFeed = function(backup) { //将纸向后回拉n
+			data = "BACKFEED " + backup + "\r\n";
+			jpPrinter.addCommand(data)
+		}
+
+		jpPrinter.setDirection = function(direction) { //设置打印方向,参考编程手册  
+			data = "DIRECTION " + direction + "\r\n";
+			jpPrinter.addCommand(data)
+		};
+
+		jpPrinter.setReference = function(x, y) { //设置坐标原点,与打印方向有关
+			data = "REFERENCE " + x + "," + y + "\r\n";
+			jpPrinter.addCommand(data)
+		};
+
+		jpPrinter.setFromfeed = function() { //根据Size进一张标签纸
+			data = "FORMFEED \r\n";
+			jpPrinter.addCommand(data)
+		};
+
+		jpPrinter.setHome = function() { //根据Size找到下一张标签纸的位置
+			data = "HOME \r\n";
+			jpPrinter.addCommand(data)
+		};
+
+		jpPrinter.setSound = function(level, interval) { //控制蜂鸣器
+			data = "SOUND " + level + "," + interval + "\r\n";
+			jpPrinter.addCommand(data)
+		};
+
+		jpPrinter.setLimitfeed = function(limit) { // 检测垂直间距
+			data = "LIMITFEED " + limit + "\r\n";
+			jpPrinter.addCommand(data)
+		};
+
+		jpPrinter.setBar = function(x, y, width, height) { //绘制线条
+			data = "BAR " + x + "," + y + "," + width + "," + height + "\r\n"
+			jpPrinter.addCommand(data)
+		};
+
+		jpPrinter.setBox = function(x_start, y_start, x_end, y_end, thickness) { //绘制方框
+			data = "BOX " + x_start + "," + y_start + "," + x_end + "," + y_end + "," + thickness + "\r\n";
+			jpPrinter.addCommand(data)
+		};
+
+		jpPrinter.setErase = function(x_start, y_start, x_width, y_height) { //清除指定区域的数据
+			data = "ERASE " + x_start + "," + y_start + "," + x_width + "," + y_height + "\r\n";
+			jpPrinter.addCommand(data)
+		};
+
+		jpPrinter.setReverse = function(x_start, y_start, x_width, y_height) { //将指定的区域反相打印
+			data = "REVERSE " + x_start + "," + y_start + "," + x_width + "," + y_height + "\r\n";
+			jpPrinter.addCommand(data)
+		};
+
+		jpPrinter.setText = function(x, y, font, x_, y_, str) { //打印文字
+			data = "TEXT " + x + "," + y + ",\"" + font + "\"," + 0 + "," + x_ + "," + y_ + "," + "\"" +
+				str + "\"\r\n"
+			jpPrinter.addCommand(data)
+		};
+
+		jpPrinter.setQR = function(x, y, level, width, mode, content) { //打印二维码
+			data = "QRCODE " + x + "," + y + "," + level + "," + width + "," + mode + "," + 0 + ",\"" +
+				content + "\"\r\n"
+			jpPrinter.addCommand(data)
+		};
+
+		jpPrinter.setBar = function(x, y, codetype, height, readable, narrow, wide, content) { //打印条形码
+			data = "BARCODE " + x + "," + y + ",\"" + codetype + "\"," + height + "," + readable + "," + 0 +
+				"," + narrow + "," + wide + ",\"" + content + "\"\r\n"
+			jpPrinter.addCommand(data)
+		};
+
+		// 固定灰度阈值(128以上的都看作白色)
+		jpPrinter.setBitmap = function(x, y, mode, res) { //添加图片,res为画布参数
+			var width = parseInt((res.width) / 8 * 8 / 8)
+			var height = res.height
+			var imgWidth = res.width
+			var time = 1;
+			var temp = res.data.length - width * 32;
+			var pointList = []
+			var resultData = []
+			console.log(width + "--" + height)
+			data = "BITMAP " + x + "," + y + "," + width + "," + height + "," + mode + ","
+			jpPrinter.addCommand(data)
+			//console.log(res.data)
+			console.log('---以上是原始数据---')
+
+			//for循环顺序不要错了,外层遍历高度,内层遍历宽度,因为横向每8个像素点组成一个字节
+			for (var y = 0; y < height; y++) {
+				for (var x = 0; x < imgWidth; x++) {
+					let r = res.data[(y * imgWidth + x) * 4];
+					let g = res.data[(y * imgWidth + x) * 4 + 1];
+					let b = res.data[(y * imgWidth + x) * 4 + 2];
+					let a = res.data[(y * imgWidth + x) * 4 + 3]
+					//console.log(`当前${y}行${x}列像素,rgba值:(${r},${g},${b},${a})`)
+					// 像素灰度值
+					let grayColor = r * 0.299 + g * 0.587 + b * 0.114
+					//灰度值大于128位 
+					//1不打印, 0打印 (参考:佳博标签打印机编程手册tspl)
+					if (grayColor > 128) {
+						pointList.push(1)
+					} else {
+						pointList.push(0)
+					}
+				}
+			}
+			//console.log(pointList)
+			for (var i = 0; i < pointList.length; i += 8) {
+				var p = pointList[i] * 128 + pointList[i + 1] * 64 + pointList[i + 2] * 32 + pointList[i +
+						3] * 16 + pointList[i + 4] * 8 + pointList[i + 5] * 4 + pointList[i + 6] * 2 +
+					pointList[i + 7]
+				resultData.push(p)
+			}
+			console.log('最终数据:')
+			//console.log(resultData)
+			for (var i = 0; i < resultData.length; ++i) {
+				command.push(intToByte(resultData[i]))
+			}
+		}
+
+		
+
+		jpPrinter.setBitmap2 = function(x, y, mode, res) { //添加图片,res为画布参数
+			var w = res.width
+			var width = parseInt((res.width + 7) / 8 * 8 / 8)
+			var height = res.height;
+			console.log(width + "--" + height)
+			data = "BITMAP " + x + "," + y + "," + width + "," + height + "," + mode + ","
+			jpPrinter.addCommand(data)
+			var r = []
+			var bits = new Uint8Array(height * width);
+			for (y = 0; y < height; y++) {
+				for (x = 0; x < w; x++) {
+					let r = res.data[(y * w + x) * 4];
+					let g = res.data[(y * w + x) * 4 + 1];
+					let b = res.data[(y * w + x) * 4 + 2];
+					let a = res.data[(y * w + x) * 4 + 3]
+					var color = ((a & 0xFF) << 24) | ((r & 0xFF) << 16) | ((g & 0xFF) << 8) | ((b & 0xFF) <<
+						0);
+					if ((color & 0xFF) > 128) {
+						bits[parseInt(y * width + x / 8)] |= (0x80 >> (x % 8));
+					}
+				}
+			}
+			for (var i = 0; i < bits.length; i++) {
+				//command.push((~bits[i]) & 0xFF);
+				command.push(intToByte(bits[i]));
+				//r.push((~bits[i]) & 0xFF);
+			}
+		}
+
+		// 平均灰度阈值(先计算平均灰度,然后大于平均灰度的都算作白色)
+		jpPrinter.setBitmap3 = function(x, y, mode, res) { //添加图片,res为画布参数
+			var width = parseInt((res.width) / 8 * 8 / 8)
+			var height = res.height
+			var imgWidth = res.width
+			var time = 1;
+			var temp = res.data.length - width * 32;
+			var pointList = []
+			var resultData = []
+			console.log(width + "--" + height)
+			data = "BITMAP " + x + "," + y + "," + width + "," + height + "," + mode + ","
+			jpPrinter.addCommand(data)
+			//console.log(res.data)
+			console.log('---以上是原始数据---')
+
+			let sumRed = 0,
+				sumGreen = 0,
+				sumBlue = 0;
+			let total = height * imgWidth;
+			let pix = res.data;
+			for (var i = 0; i < pix.length; i += 4) {
+				sumRed += pix[i]
+				sumGreen += pix[i + 1]
+				sumBlue += pix[i + 2]
+			}
+
+			let avgRed = parseInt(sumRed / total);
+			let avgGreen = parseInt(sumGreen / total);
+			let avgBlue = parseInt(sumBlue / total);
+			let avgGrayColor = avgRed * 0.299 + avgGreen * 0.587 + avgBlue * 0.114
+
+
+			//for循环顺序不要错了,外层遍历高度,内层遍历宽度,因为横向每8个像素点组成一个字节
+			for (var y = 0; y < height; y++) {
+				for (var x = 0; x < imgWidth; x++) {
+					let r = res.data[(y * imgWidth + x) * 4];
+					let g = res.data[(y * imgWidth + x) * 4 + 1];
+					let b = res.data[(y * imgWidth + x) * 4 + 2];
+					let a = res.data[(y * imgWidth + x) * 4 + 3]
+					// 像素灰度值
+					let grayColor = r * 0.299 + g * 0.587 + b * 0.114
+					//灰度值大于128位 
+					//1不打印, 0打印 (参考:佳博标签打印机编程手册tspl)
+					if (grayColor > avgGrayColor) {
+						pointList.push(1)
+					} else {
+						pointList.push(0)
+					}
+				}
+			}
+			//console.log(pointList)
+			for (var i = 0; i < pointList.length; i += 8) {
+				var p = pointList[i] * 128 + pointList[i + 1] * 64 + pointList[i + 2] * 32 + pointList[i +
+						3] * 16 + pointList[i + 4] * 8 + pointList[i + 5] * 4 + pointList[i + 6] * 2 +
+					pointList[i + 7]
+				resultData.push(p)
+
+			}
+			console.log('最终数据:')
+			//console.log(resultData)
+			for (var i = 0; i < resultData.length; ++i) {
+				command.push(intToByte(resultData[i]))
+			}
+		}
+
+		jpPrinter.RawCommand = function(data) {
+			jpPrinter.addCommand(data)
+		}
+
+		jpPrinter.setPagePrint = function(m,n) { //打印页面
+			data = "PRINT "+m+","+n+"\r\n"
+			jpPrinter.addCommand(data)
+		};
+		//获取打印数据
+		jpPrinter.getData = function() {
+			return command;
+		};
+
+		jpPrinter.getRawData = function() {
+			return rawCommand;
+		};
+		jpPrinter.clearCommand = function() {
+			rawCommand = ''
+		};
+
+		return jpPrinter;
+	}
+};
+
+module.exports.jpPrinter = jpPrinter;

+ 323 - 0
components/kk-printer/utils/bluetoolth.js

@@ -0,0 +1,323 @@
+/**
+ * @export
+ * @param {string} name 微信api的名称 ,如 uniAsyncPromise("getSystemInfo",options)
+ * @param {object} options 除了success 和 fail 的其他参数
+ * @returns
+ */
+export function uniAsyncPromise(name, options) {
+	return new Promise((resolve, reject) => {
+		uni[name]({
+			...(options || {}),
+			// ...options,
+			success: (res) => {
+				resolve(res);
+			},
+			fail: (err) => {
+				reject(err);
+			}
+		});
+	});
+}
+//微信小程序向蓝牙打印机发送数据进行打印的坑:
+//小程序api向蓝牙打印机发送数据打印,发送的任何内容都应该要转成二进制数据,而且蓝牙打印的文本编码是GBK的,发送中文需转成GBK编码再转成二进制数据发送
+//发送打印机指令也要转成二进制数据发送
+//蓝牙打印机一次接收的二级制数据有限制,不同的系统不同的蓝牙设备限制可能不同,微信建议一次20个字节,需做递归分包发送
+//发送完要打印的内容后,一定要发送一个打印的指令才能顺利打印 (有些指令就不需要)
+
+//一、初始化蓝牙、开始检索蓝牙设备
+// { allowDuplicatesKey: true, interval: 500}
+export function openBlue() {
+	return uniAsyncPromise('openBluetoothAdapter')
+}
+
+export function startBluetoothDevicesDiscovery(option) {
+	console.log('开始蓝牙扫描');
+	uniAsyncPromise('startBluetoothDevicesDiscovery', option).then((res) => {
+		console.log('正在搜寻蓝牙设备', res);
+	});
+}
+
+export function getConnectedBluetoothDevices(option) {
+	console.log('开始获取已连接设备');
+	return uniAsyncPromise('getConnectedBluetoothDevices', option)
+}
+//二、
+/**
+ *
+ *
+ * @export
+ * @param {function} getDevices uni.getBluetoothDevices的监听回调函数
+ */
+export function onfindBlueDevices(getDevices) {
+	//监听寻找到新设备的事件
+	uni.onBluetoothDeviceFound((devices)=>{
+		//获取在蓝牙模块生效期间所有已发现的蓝牙设备
+		uniAsyncPromise('getBluetoothDevices').then((res) => {
+			getDevices && getDevices(res.devices);
+		});
+	});
+}
+
+/**
+ * @export
+ * @param {function} stopBlueDevicesDiscovery 关闭蓝牙扫描
+ */
+export function stopBlueDevicesDiscovery() {
+	//监听寻找到新设备的事件
+	console.log('停止蓝牙扫描');
+	return uniAsyncPromise('stopBluetoothDevicesDiscovery').then((res) => {
+		console.log('停止搜寻蓝牙设备', res);
+	});
+}
+
+
+
+//三、连接蓝牙设备
+/**
+ * @export
+ * @param {function} createBLEConnection 
+ * @param {number} deviceId 蓝牙设备id
+ */
+export function createBLEConnection(deviceId, sucess, fail) {
+	//连接蓝牙设备
+	console.log('连接蓝牙设备', deviceId);
+	uniAsyncPromise("createBLEConnection", {
+			deviceId
+		})
+		.then(res => {
+			//连接成功可选择停止搜索蓝牙
+			stopBlueDevicesDiscovery();
+			console.log('连接成功');
+			sucess && sucess({
+				res: res,
+			});
+		})
+		.catch(res => {
+			console.log('连接设备异常' + res);
+			fail && fail({
+				res: res,
+			});
+		})
+	/*.finally(res=>{
+	    console.log('连接成功');
+	    sucess && sucess({
+	        res: res,
+	    });
+	});*/
+}
+
+export function closeBLEConnection(deviceId) {
+	console.log('断开蓝牙设备', deviceId);
+	uniAsyncPromise("closeBLEConnection", {
+			deviceId
+		})
+		.then(res => {
+			console.log('BLEDisconnect complete', res);
+		})
+		.catch(res => {
+			console.log('断开设备异常' + res);
+		})
+	/*.finally(res=>{
+	    console.log('BLEDisconnect complete', res);            
+	});  */
+}
+
+//四、连接成功后, 获取蓝牙设备的service服务
+// uniAsyncPromise("getBLEDeviceServices",{deviceId:""}).then(res=>{})
+export function getBLEDeviceServices(deviceId, success, fail) {
+	console.log('获取ServiceId', deviceId);
+	//加延迟避免取不到service
+	setTimeout(()=>{
+		uniAsyncPromise("getBLEDeviceServices", {
+			deviceId:deviceId
+		})
+		.then(res => {
+			console.log('服务', res);
+			success && success({
+				serviceId: res.services,
+			});
+		})
+		.catch((res) => {
+			//getBLEDeviceServices(deviceId, success, fail);
+			console.log('获取ServiceId异常' + res);
+			fail && fail({
+				res: res,
+			});
+		});
+	},1000)
+}
+
+//五、获取的service服务可能有多个,递归获取特征值(最后要用的是能读,能写,能监听的那个值的uuid作为特征值id)
+/**
+ *
+ *
+ * @export
+ * @param {number} deviceId 蓝牙设备id
+ * @param {array} services uniAsyncPromise("getBLEDeviceServices",{deviceId:""}).then(res=>{})获取的res.services
+ * @param {function} success 成功取得有用特征值uuid的回调函数
+ */
+export function getDeviceCharacteristics(deviceId, services, success, fail) {
+	//services = services.slice(0);
+	console.log('获取Characteristics', deviceId, services);
+	if (services.length) {
+		const serviceId = services.shift().uuid;
+		console.log('ServceID ', serviceId);
+		uniAsyncPromise('getBLEDeviceCharacteristics', {
+				deviceId,
+				serviceId,
+			})
+			.then((res) => {
+				console.log('getBLEDeviceCharacteristics', deviceId, serviceId, res);
+				let finished = false;
+				let write = false;
+				let notify = false;
+				let indicate = false;
+				var readId;
+				var writeId;
+				//有斑马品牌的一款打印机中res.characteristics的所有uuid都是相同的,找所有的properties存在(notify || indicate) && write这种情况就说明这个uuid是可用的(不确保所有的打印机都能用这种方式取得uuid,在主要测试得凯盛诺打印机res.characteristic只有一个uuid,所以也能用这个方式)
+				for (var i = 0; i < res.characteristics.length; i++) {
+					if (!notify) {
+						notify = res.characteristics[i].properties.notify;
+						if (notify) readId = res.characteristics[i].uuid;
+					}
+					if (!indicate) {
+						indicate = res.characteristics[i].properties.indicate;
+						if (indicate) readId = res.characteristics[i].uuid;
+					}
+					if (!write) {
+						write = res.characteristics[i].properties.write;
+						writeId = res.characteristics[i].uuid;
+					}
+					if ((notify || indicate) && write) {
+						/* 获取蓝牙特征值uuid */
+						success &&
+							success({
+								serviceId,
+								writeId: writeId,
+								readId: readId,
+							});
+						finished = true;
+						break;
+					}
+				}
+
+				if (!finished) {
+					getDeviceCharacteristics(deviceId, services, success, fail);
+				}
+			})
+			.catch((res) => {
+				getDeviceCharacteristics(deviceId, services, success, fail);
+			});
+	} else {
+		fail && fail();
+	}
+}
+
+//六、启动notify 蓝牙监听功能 然后使用 uni.onBLECharacteristicValueChange用来监听蓝牙设备传递数据
+/**
+ * @export
+ * @param {object} options
+ * {
+            deviceId,//蓝牙设备id
+            serviceId,//服务id
+            characteristicId,//可用特征值uuid
+    }
+ * @param {function} onChange 监听蓝牙设备传递数据回调函数
+ */
+export function onGetBLECharacteristicValueChange(options, onChange = function() {}) {
+	console.log('deviceId ', options.deviceId);
+	console.log('serviceId ', options.serviceId);
+	console.log('characteristicId ', options.characteristicId);
+	uniAsyncPromise('notifyBLECharacteristicValueChange', {
+		state: true,
+		...options,
+	}).then((res) => {
+		console.log('onBLECharacteristicValueChange ');
+		uni.onBLECharacteristicValueChange(onChange);
+	});
+}
+
+//七、发送数据(递归分包发送)
+/**
+ * @export
+ * @param {object} options
+ * {
+            deviceId,
+            serviceId,
+            characteristicId,
+			value [ArrayBuffer],
+			lasterSuccess,
+    }
+ */
+export function senBlData(deviceId, serviceId, characteristicId,uint8Array,lasterSuccess) {
+	console.log('************deviceId = [' + deviceId + ']  serviceId = [' + serviceId + '] characteristics=[' +characteristicId+ "]")
+	var uint8Buf = Array.from(uint8Array);
+	function split_array(datas,size){
+		var result = {};
+		var j = 0
+		if(datas.length < size) {
+			size = datas.length
+		}
+		for (var i = 0; i < datas.length; i += size) {
+			result[j] = datas.slice(i, i + size)
+			j++
+		}
+		return result
+	}
+	var sendloop = split_array(uint8Buf, 20);
+	console.log(sendloop.length)
+	function realWriteData(sendloop, i) {
+		var data = sendloop[i]
+		if(typeof(data) == "undefined"){
+			lasterSuccess()
+			return
+		}
+		//console.log("第【" + i + "】次写数据"+data)
+		var buffer = new ArrayBuffer(data.length)
+		var dataView = new DataView(buffer)
+		for (var j = 0; j < data.length; j++) {
+			dataView.setUint8(j, data[j]);
+		}
+		uni.writeBLECharacteristicValue({
+			deviceId,
+			serviceId,
+			characteristicId,
+			value: buffer,
+			success(res) {
+				console.log('发送成功',i)
+				setTimeout(()=>{
+					realWriteData(sendloop, i + 1);
+				},100)
+			},
+			fail(e) {
+				console.log('发送数据失败',e)
+			}
+		})
+	}
+   var i = 0;
+	realWriteData(sendloop, i);
+}
+ 
+/**
+ * toast显示捕获的蓝牙异常
+ */
+export function catchToast(err) {
+	const errMsg = {
+		10000: '未初始化蓝牙模块',
+		10001: '蓝牙未打开',
+		10002: '没有找到指定设备',
+		10003: '连接失败',
+		10004: '没有找到指定服务',
+		10005: '没有找到指定特征值',
+		10006: '当前连接已断开',
+		10007: '当前特征值不支持此操作',
+		10008: '系统上报异常',
+		10009: '系统版本低于 4.3 不支持BLE'
+	};
+	let coode = err.errCode ? err.errCode.toString() : '';
+	let msg = errMsg[coode];
+	plus.nativeUI.toast(msg || coode, {
+		align: 'center',
+		verticalAlign: 'center'
+	});
+}

+ 171 - 0
components/kk-printer/utils/util.js

@@ -0,0 +1,171 @@
+//const gbk = require('./gbk.js');
+//console.log("sasas" + gbk);
+const formatTime = date => {
+  const year = date.getFullYear()
+  const month = date.getMonth() + 1
+  const day = date.getDate()
+  const hour = date.getHours()
+  const minute = date.getMinutes()
+  const second = date.getSeconds()
+
+  return [year, month, day].map(formatNumber).join('/') + ' ' + [hour, minute, second].map(formatNumber).join(':')
+}
+
+const formatNumber = n => {
+  n = n.toString()
+  return n[1] ? n : '0' + n
+}
+
+/*
+const hexStringToBuff = str => { //str='中国:WXHSH'
+  const buffer = new ArrayBuffer((sumStrLength(str)) * 4)
+  const dataView = new DataView(buffer)
+  var data = str.toString();
+  var p = 0; //ArrayBuffer 偏移量
+  for (var i = 0; i < data.length; i++) {
+    if (isCN(data[i])) { //是中文
+      //调用GBK 转码
+      var t = gbk.encode(data[i]);
+      for (var j = 0; j < 2; j++) {
+        //var code = t[j * 2] + t[j * 2 + 1];
+        var code = t[j * 3 + 1] + t[j * 3 + 2];
+         var temp = parseInt(code, 16)
+        //var temp = strToHexCharCode(code);
+        dataView.setUint8(p++, temp)
+      }
+    } else {
+      var temp = data.charCodeAt(i);
+      dataView.setUint8(p++, temp)
+    }
+  }
+  return buffer;
+}
+*/
+function toUnicode(s) {
+  var str = "";
+  for (var i = 0; i < s.length; i++) {
+    str += "\\u" + s.charCodeAt(i).toString(16) + "\t";
+  }
+  return str;
+}
+
+function strToHexCharCode(str) {
+  if (str === "")
+    return "";
+  var hexCharCode = [];
+  hexCharCode.push("0x");
+  for (var i = 0; i < str.length; i++) {
+    hexCharCode.push((str.charCodeAt(i)).toString(16));
+  }
+  return hexCharCode.join("");
+}
+
+function sumStrLength(str) {
+  var length = 0;
+  var data = str.toString();
+  for (var i = 0; i < data.length; i++) {
+    if (isCN(data[i])) { //是中文
+      length += 2;
+    } else {
+      length += 1;
+    }
+  }
+  return length;
+}
+
+function isCN(str) {
+  if (/^[\u3220-\uFA29]+$/.test(str)) {
+    return true;
+  } else {
+    return false;
+  }
+}
+
+//汉字转码
+function hexStringToArrayBuffer(str) {
+  const buffer = new ArrayBuffer((str.length / 2) + 1)
+  const dataView = new DataView(buffer)
+  for (var i = 0; i < str.length / 2; i++) {
+    var temp = parseInt(str[i * 2] + str[i * 2 + 1], 16)
+    dataView.setUint8(i, temp)
+  }
+  dataView.setUint8((str.length / 2), 0x0a)
+  return buffer;
+}
+
+//返回八位数组
+function subString(str) {
+  var arr = [];
+  if (str.length > 8) { //大于8
+    for (var i = 0;
+      (i * 8) < str.length; i++) {
+      var temp = str.substring(i * 8, 8 * i + 8);
+      arr.push(temp)
+    }
+    return arr;
+  } else {
+    return str
+  }
+}
+
+//不带有汉字
+function hexStringToArrayBufferstr(str) {
+  let val = ""
+  for (let i = 0; i < str.length; i++) {
+    if (val === '') {
+      val = str.charCodeAt(i).toString(16)
+    } else {
+      val += ',' + str.charCodeAt(i).toString(16)
+    }
+  }
+  val += "," + "0x0a";
+  console.log(val)
+  // 将16进制转化为ArrayBuffer
+  return new Uint8Array(val.match(/[\da-f]{2}/gi).map(function(h) {
+    return parseInt(h, 16)
+  })).buffer
+}
+
+function ab2hex(buffer) {
+  let hexArr = Array.prototype.map.call(
+    new Uint8Array(buffer),
+    function (bit) {
+      return ('00' + bit.toString(16)).slice(-2)
+    })
+  return hexArr.join('');
+}
+
+// ArrayBuffer转为字符串,参数为ArrayBuffer对象
+function ab2str(buf) {
+  return String.fromCharCode.apply(null, new Uint8Array(buf));
+}
+
+// 字符串转为ArrayBuffer对象,参数为字符串
+function str2ab(str) {
+  var buf = new ArrayBuffer(str.length+1); // 补充/0
+  var bufView = new Uint8Array(buf);
+  for (var i = 0, strLen = str.length; i < strLen; i++) {
+    bufView[i] = str.charCodeAt(i);    
+  }
+  return buf;
+}
+
+function send0X0A() {
+  const buffer = new ArrayBuffer(1)
+  const dataView = new DataView(buffer)
+  dataView.setUint8(0, 0x0a)
+  return buffer;
+}
+
+function buf2hex(buffer) {
+  return Array.prototype.map.call(new Uint8Array(buffer), x => ('00' + x.toString(16)).slice(-2)).join('');
+}
+
+module.exports = {
+  hexStringToArrayBuffer: hexStringToArrayBuffer,
+  send0X0A: send0X0A,
+  ab2hex: ab2hex,
+  str2ab: str2ab,
+  ab2str: ab2str,
+  buf2hex: buf2hex
+}

+ 19 - 4
pages/common/printTag/printTag.vue

@@ -18,28 +18,43 @@
 		<view class="buttons flex align_center justify_center">
 			<view v-if="fromPage == 'bdtq'"><u-button @click="cansel" shape="circle" plain>返回列表</u-button></view>
 			<view v-if="fromPage == 'smdy'"><u-button @click="cansel" shape="circle" plain>重新扫描</u-button></view>
-			<view><u-button @click="print" shape="circle" :custom-style="{background:$config('primaryColor')}" type="primary">开始打印</u-button></view>
+			<view>
+				<kk-printer ref="kkprinter" :bufferData="bufferData" @onPrintSuccess="onPrintSuccess"></kk-printer>
+			</view>
 		</view>
 	</view>
 </template>
 
 <script>
+	import kkPrinter from '@/components/kk-printer/index.vue';
 	export default {
+		components:{
+			kkPrinter
+		},
 		data() {
 			return {
 				part: null,
-				fromPage: ''
+				fromPage: '',
+				bufferData:''
 			}
 		},
 		onLoad(opts) {
 			this.fromPage = opts.from
 		},
+		onUnload() {
+			this.$refs.kkprinter.closeConnect()
+		},
 		methods: {
 			cansel(){
 				uni.navigateBack()
 			},
-			print(){
-				
+			// 打印
+			onPrint(opt){
+				this.bufferData = strCmd;
+			},
+			// 打印成功
+			onPrintSuccess(){
+				uni.navigateBack()
 			}
 		}
 	}

+ 1 - 0
store/index.js

@@ -101,6 +101,7 @@ const store = new Vuex.Store({
 		vuex_reConnectId: null, // 重连id
 		vuex_messagUnReadCount: 0, // 消息未读数
 		vuex_messagLaster: [], // 最新消息
+		vuex_lastBuleDevice: null
 	},
 	mutations: {
 		$uStore(state, payload) {

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