vue-plugin-hiprint的学习与应用

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简介

本文介绍对vue-plugin-hiprint部分重要代码的解析，这是一个很好的开源插件，能够自己自定义打印模板，通过后端传来的数据进行渲染打印，官方也提供了许多的api供开发者使用。界面采用了antdesign。实现了免预览的直接打印。

github：https://github.com/CcSimple/vue-plugin-hiprint
print.io官网：http://hiprint.io/demo

引入插件：

jsbarcode：

npm install jsbarcode --save

socket.io：

npm install socket.io

jspdf：

npm install jspdf --save

代码简单介绍

面板

分别是：拖拽组件、画布、属性栏

<a-row :gutter="[8,0]">
  <a-col :span="4">
    <a-card style="height: 100vh">
      <a-row>
        <a-col :span="24" class="rect-printElement-types hiprintEpContainer">
        </a-col>
      </a-row>
    </a-card>
  </a-col>
  <a-col :span="14">
    <a-card class="card-design">
      <div id="hiprint-printTemplate" class="hiprint-printTemplate"></div>
    </a-card>
  </a-col>
  <a-col :span="6" class="params_setting_container">
    <a-card>
      <a-row class="hinnn-layout-sider">
        <div id="PrintElementOptionSetting"></div>
      </a-row>
    </a-card>
  </a-col>
</a-row>

初始化

在挂载中调用初始化

mounted() {
  this.init()
  this.otherPaper()
},

其中初始化方法：

init() { // 左边设计模板的选择
  this.modeList = providers.map((e) => {
    return {type: e.type, name: e.name, value: e.value}
  })
  this.changeMode()
},
changeMode() { // 数据渲染
  let {mode} = this
  let provider = providers[mode]
  console.log("provider", provider)
  hiprint.init({
    providers: [provider.f]
  });
  $('.hiprintEpContainer').empty()
  hiprint.PrintElementTypeManager.build('.hiprintEpContainer', provider.value);
  $('#hiprint-printTemplate').empty()
  let templates = this.$ls.get('KEY_TEMPLATES', {}) // 从本地获取数据
  console.log("getTemplates", templates)
  let template = templates[provider.value] ? templates[provider.value] : {}
  hiprintTemplate = new hiprint.PrintTemplate({
    template: template, // panels: [{...}]
    dataMode: 1, // 1:getJson 其他：getJsonTid 默认1
    history: true, // 是否需要 撤销重做功能
    onDataChanged: (type, json) => {
      console.log(type); // 新增、移动、删除、修改(参数调整)、大小、旋转
      console.log(json); // 返回 template
      // 更新模板
      hiprintTemplate.update(json)
      // console.log(hiprintTemplate.historyList)
    },
    settingContainer: '#PrintElementOptionSetting',
    paginationContainer: '.hiprint-printPagination'
  });
  hiprintTemplate.design('#hiprint-printTemplate');
  console.log('hiprintTemplate', hiprintTemplate);
  // 获取当前放大比例, 当zoom时传true 才会有
  this.scaleValue = hiprintTemplate.editingPanel.scale || 1;
},

设置纸张大小

otherPaper() {
  let value = {}
  value.width = this.paperWidth
  value.height = this.paperHeight
  this.paperPopVisible = false
  this.setPaper('other', value)
},
/**
 * 设置纸张大小
 * @param type [A3, A4, A5, B3, B4, B5, other]
 * @param value {width,height} mm
 */
setPaper(type, value) {
  try {
    if (Object.keys(this.paperTypes).includes(type)) {
      this.curPaper = {type: type, width: value.width, height: value.height}
      hiprintTemplate.setPaper(value.width, value.height)
    } else {
      this.curPaper = {type: 'other', width: value.width, height: value.height}
      hiprintTemplate.setPaper(value.width, value.height)
    }
  } catch (error) {
    this.$message.error(`操作失败: ${error}`)
  }
},

通过生命周期activated来解决切换模板的时候还能拖拽，并且不会被清除

activated() {
  // 重新再实例化, 处理切换demo, 无法拖拽问题
  if (this.deactivated) {
    this.changeMode();
    this.deactivated = false;
  }
},
deactivated() {
  this.deactivated = true;
},

预览

封装的预览vue界面
将模板和数据用HTML的方法转化赋值 $('#preview_content_custom').html(hiprintTemplate.getHtml(printData))

<template>
  <a-modal :visible="visible" :maskClosable="false"
           @cancel="hideModal" :width="width+'mm'">
    <a-spin :spinning="spinning" style="min-height: 100px">
      <div id="preview_content_custom"></div>
    </a-spin>
    <template slot="title">
      <a-space>
        <div style="margin-right: 20px">打印预览</div>
        <a-button :loading="waitShowPrinter" type="primary" icon="printer" @click.stop="print">打印</a-button>
        <a-button type="primary" icon="printer" @click.stop="toPdf">pdf</a-button>
      </a-space>
    </template>
    <template slot="footer">
      <a-button key="close" type="info" @click="hideModal">
        关闭
      </a-button>
    </template>
  </a-modal>
</template>

<script>
export default {
  name: "printPreview",
  props: {},
  data() {
    return {
      visible: false,
      spinning: true,
      waitShowPrinter: false,
      // 纸张宽 mm
      width: 0,
      // 模板
      hiprintTemplate: {},
      // 数据
      printData: {}
    }
  },
  computed: {},
  watch: {},
  created() {
  },
  mounted() {
  },
  methods: {
    hideModal() {
      this.visible = false
    },
    show(hiprintTemplate, printData, width = '210') {
      this.visible = true
      this.spinning = true
      this.width = width
      this.hiprintTemplate = hiprintTemplate
      this.printData = printData
      setTimeout(() => {
        // eslint-disable-next-line no-undef
        $('#preview_content_custom').html(hiprintTemplate.getHtml(printData))
        this.spinning = false
      }, 500)
    },
    print() {
      this.waitShowPrinter = true
      this.hiprintTemplate.print(this.printData, {}, {
        callback: () => {
          this.waitShowPrinter = false
        }
      })
    },
    toPdf() {
      this.hiprintTemplate.toPdf(this.printData, '打印预览pdf');
    },
  }
}

</script>
<style lang="less" scoped>

/deep/ .ant-modal-body {
  padding: 0px;
}

/deep/ .ant-modal-content {
  margin-bottom: 24px;
}
</style>

直接打印

直接打印需要安装桌面插件，window.hiwebSocket.opened是为了判断socketIo是否打开，hiprintTemplate中的print2是直接打印，print是会显示预览的打印。直接打印在printIo底层会自动去连接客户端，以及传输数据。

print() {
  if (window.hiwebSocket.opened) {
    const printerList = hiprintTemplate.getPrinterList();
    console.log(printerList) // 打印机列表数据
    console.log('printData', printData) // 数据源
    hiprintTemplate.print2(printData, {printer: '', title: 'hiprint测试直接打印'});
    return
  }
  this.$message.error('客户端未连接,无法直接打印')
},

批量打印

批量打印就是采用队列打印的方式，通过TaskRunner 任务进程管理，在通过for循环收集数据去打印。

batPrint() { // 批量打印
  if (window.hiwebSocket.opened) {
    const printerList = hiprintTemplate.getPrinterList();
    console.log(printerList) // 打印机列表
    this.tasksPrint()
    return
  }
  this.$message.error('客户端未连接,无法直接打印')
},
tasksPrint() { // 队列打印
  const runner = new TaskRunner();
  runner.setConcurrency(1); // 同时执行数量
  const task = []
  let that = this
  const tasksKey = `open${Date.now()}`;
  for (let i = 0; i < testDatas.table.length; i++) { // 循环数据
    // done -> 任务完成回调
    let key = `task${i}`;
    task.push(done => {
      let printData = {
        testChinese: testDatas.table[i].testChinese,
        testEnglish: testDatas.table[i].testEnglish
      } // 动态数据
      console.log('printData', printData)
      that.realPrint(runner, done, key, i, printData, tasksKey)
    })
  }
  runner.addMultiple(task)
  this.openNotification(runner, tasksKey)
},
realPrint(runner, done, key, i, printData, tasksKey) {
  let that = this
  that.$notification.info({
    key: key,
    placement: 'topRight',
    duration: 2.5,
    message: `正在准备打印第 ${i} 张`,
    description: '队列运行中...',
  });
  let template = that.$ls.get('KEY_TEMPLATES', {}) // 外層還有個模板名包裹
  let hiprintTemplate = new hiprint.PrintTemplate({
    template: template.aProviderModule,
  });
  hiprintTemplate.print2(printData, {printer: '', title: key});
  hiprintTemplate.on('printSuccess', function () {
    let info = runner.tasks.list.length > 1 ? '准备打印下一张' : '已完成打印'
    that.$notification.success({
      key: key,
      placement: 'topRight',
      message: key + ' 打印成功',
      description: info,
    });
    done()
    if (!runner.isBusy()) {
      that.$notification.close(tasksKey)
    }
  })
  hiprintTemplate.on('printError', function () {
    that.$notification.close(key)
    done()
    that.$message.error('打印失败，已加入重试队列中')
    runner.add(that.realPrint(runner, done, key, i, printData))
  })
},
openNotification(runner, tasksKey) {
  let that = this;
  that.$notification.open({
    key: tasksKey,
    message: '队列运行中...',
    duration: 0,
    placement: 'topLeft',
    description: '点击关闭所有任务',
    btn: h => {
      return h(
          'a-button',
          {
            props: {
              type: 'danger',
              size: 'small',
            },
            on: {
              click: () => {
                that.$notification.close(tasksKey);
                // 详情请查阅文档
                runner.removeAll();
                that.$message.info('已移除所有任务');
              },
            },
          },
          '关闭任务',
      );
    },
  });
}

保存JSON数据

只要调用apihiprintTemplate.getJson()

saveJson() {
  if (hiprintTemplate) {
    const jsonOut = JSON.stringify(hiprintTemplate.getJson() || {})
    console.log(jsonOut)
  }
},

自定义组件

封装js中，使用addPrintElementTypes方法添加自定义的组件，可以查看print.io官方文档来配置参数。通过控制台输入window.HIPRINT_CONFIG可以查看配置参数名。

new hiprint.PrintElementTypeGroup("自定义表格1", [
  {
    tid: 'aProviderModule.customText1',
    title: '表格标题',
    customText: '自定义文本',
    custom: true,
    width: 120,
    type: 'text',
    options: {
      height: 31.5,
      hideTitle: true,
      field: 'testEnglish',
      fontSize: 20.25,
      color: '#000000',
      backgroundColor: '#ffffff',
      textAlign: 'center',
      textContentVerticalAlign: 'middle',
      lineAlign: 'center',
      borderLeft: 'solid',
      borderTop: 'solid',
      borderRight: 'solid',
      borderBottom: 'solid'
    }
  },
  {
    tid: 'aProviderModule.customText2',
    title: '表格内容',
    customText: '自定义文本',
    custom: true,
    width: 120,
    type: 'text',
    options: {
      hideTitle: true,
      field: 'testChinese',
      height: 31.5,
      fontSize: 20.25,
      color: '#000000',
      backgroundColor: '#ffffff',
      textAlign: 'center',
      textContentVerticalAlign: 'middle',
      lineAlign: 'center',
      borderLeft: 'solid',
      borderTop: 'solid',
      borderRight: 'solid',
      borderBottom: 'solid'
    }
  },
]),

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