ruoyi-nbcio-plus基于vue3的flowable流程设计器主界面升级修改

<template>
  <div class="my-process-designer">
    <div class="my-process-designer__header">
      <slot name="control-header"></slot>
      <template v-if="!$slots['control-header']">
        <el-button-group key="file-control">
          <el-button :size="headerButtonSize" :type="headerButtonType" icon="el-icon-edit-outline" @click="onSave">保存流程</el-button>
          <el-button :size="headerButtonSize" :type="headerButtonType" :icon="FolderOpened" @click="$refs.refFile.click()">打开文件</el-button>
          <el-tooltip effect="light">
            <template #content>
              <el-button :size="headerButtonSize" type="primary" @click="downloadProcessAsXml()">下载为XML文件</el-button>
              <br />
              <el-button :size="headerButtonSize" type="primary" @click="downloadProcessAsSvg()">下载为SVG文件</el-button>
              <br />
              <el-button :size="headerButtonSize" type="primary" @click="downloadProcessAsBpmn()">下载为BPMN文件</el-button>
            </template>
            <el-button :size="headerButtonSize" :type="headerButtonType" :icon="Download">下载文件</el-button>
          </el-tooltip>
          <el-tooltip effect="light">
            <template #content>
              <el-button :size="headerButtonSize" type="primary" @click="previewProcessXML">预览XML</el-button>
              <br />
              <el-button :size="headerButtonSize" type="primary" @click="previewProcessJson">预览JSON</el-button>
            </template>
            <el-button :size="headerButtonSize" :type="headerButtonType" :icon="View">预览</el-button>
          </el-tooltip>
          <el-tooltip v-if="simulation" effect="light" :content="this.simulationStatus ? '退出模拟' : '开启模拟'">
            <el-button :size="headerButtonSize" :type="headerButtonType" :icon="Cpu" @click="processSimulation">
              模拟
            </el-button>
          </el-tooltip>
        </el-button-group>
        <el-button-group key="align-control">
          <el-tooltip effect="light" content="向左对齐">
            <el-button :size="headerButtonSize" class="align align-left" :icon="Histogram" @click="elementsAlign('left')" />
          </el-tooltip>
          <el-tooltip effect="light" content="向右对齐">
            <el-button :size="headerButtonSize" class="align align-right" :icon="Histogram" @click="elementsAlign('right')" />
          </el-tooltip>
          <el-tooltip effect="light" content="向上对齐">
            <el-button :size="headerButtonSize" class="align align-top" :icon="Histogram" @click="elementsAlign('top')" />
          </el-tooltip>
          <el-tooltip effect="light" content="向下对齐">
            <el-button :size="headerButtonSize" class="align align-bottom" :icon="Histogram" @click="elementsAlign('bottom')" />
          </el-tooltip>
          <el-tooltip effect="light" content="水平居中">
            <el-button :size="headerButtonSize" class="align align-center" :icon="Histogram" @click="elementsAlign('center')" />
          </el-tooltip>
          <el-tooltip effect="light" content="垂直居中">
            <el-button :size="headerButtonSize" class="align align-middle" :icon="Histogram" @click="elementsAlign('middle')" />
          </el-tooltip>
        </el-button-group>
        <el-button-group key="scale-control">
          <el-tooltip effect="light" content="缩小视图">
            <el-button :size="headerButtonSize" :disabled="defaultZoom < 0.2" :icon="ZoomOut" @click="processZoomOut()" />
          </el-tooltip>
          <el-button :size="headerButtonSize">{{ Math.floor(this.defaultZoom * 10 * 10) + "%" }}</el-button>
          <el-tooltip effect="light" content="放大视图">
            <el-button :size="headerButtonSize" :disabled="defaultZoom > 4" :icon="ZoomIn" @click="processZoomIn()" />
          </el-tooltip>
          <el-tooltip effect="light" content="重置视图并居中">
            <el-button :size="headerButtonSize" :icon="ScaleToOriginal" @click="processReZoom()" />
          </el-tooltip>
        </el-button-group>
        <el-button-group key="stack-control">
          <el-tooltip effect="light" content="撤销">
            <el-button :size="headerButtonSize" :disabled="!revocable" :icon="RefreshLeft" @click="processUndo()" />
          </el-tooltip>
          <el-tooltip effect="light" content="恢复">
            <el-button :size="headerButtonSize" :disabled="!recoverable" :icon="RefreshRight" @click="processRedo()" />
          </el-tooltip>
          <el-tooltip effect="light" content="重新绘制">
            <el-button :size="headerButtonSize" :icon="Refresh" @click="processRestart" />
          </el-tooltip>
        </el-button-group>
      </template>
      <!-- 用于打开本地文件-->
      <input type="file" id="files" ref="refFile" style="display: none" accept=".xml, .bpmn" @change="importLocalFile" />
    </div>
    <div class="my-process-designer__container">
      <div class="my-process-designer__canvas" ref="bpmn-canvas"></div>
    </div>
    <el-dialog title="预览" width="60%" v-model="previewModelVisible" append-to-body destroy-on-close>
      <highlightjs :language="previewType" :code="previewResult" style="height: 80vh" />
    </el-dialog>
    <!--<el-dialog :title="`预览${previewType}`" width="60%" v-model="previewModelVisible" append-to-body destroy-on-close>
        <Codemirror
          v-model:value="previewResult"
          :options="cmOptions"
          border
          :height="700"
        />
    </el-dialog>-->
  </div>
</template>
<script>
import { Histogram, Cpu, Refresh, RefreshLeft, RefreshRight, ZoomOut, ZoomIn, View, Download, FolderOpened, ScaleToOriginal } from '@element-plus/icons-vue'
import BpmnModeler from "bpmn-js/lib/Modeler";
import DefaultEmptyXML from "./plugins/defaultEmpty";
// 翻译方法
import customTranslate from "./plugins/translate/customTranslate";
import translationsCN from "./plugins/translate/zh";
// 模拟流转流程
import tokenSimulation from "bpmn-js-token-simulation";
// 标签解析构建器
// import bpmnPropertiesProvider from "bpmn-js-properties-panel/lib/provider/bpmn";
// 标签解析 Moddle
import camundaModdleDescriptor from './plugins/descriptor/camundaDescriptor.json';
import activitiModdleDescriptor from './plugins/descriptor/activitiDescriptor.json';
import flowableModdleDescriptor from './plugins/descriptor/flowableDescriptor.json';
// 标签解析 Extension
import camundaModdleExtension from './plugins/extension-moddle/camunda';
import activitiModdleExtension from './plugins/extension-moddle/activiti';
import flowableModdleExtension from './plugins/extension-moddle/flowable';
// 引入json转换与高亮
// import X2JS from "x2js";
import convert from "xml-js";
import Codemirror from 'codemirror-editor-vue3';
import 'codemirror/theme/monokai.css'
import 'codemirror/mode/javascript/javascript.js';
import 'codemirror/mode/xml/xml.js';
export default {
  name: "MyProcessDesigner",
  componentName: "MyProcessDesigner",
  components: {
    Codemirror
  },
  setup() {
    return {
      Histogram, Cpu, Refresh, RefreshLeft, RefreshRight, ZoomOut, ZoomIn, View, Download, FolderOpened, ScaleToOriginal
    }
  },
  emits: ['destroy', 'init-finished', 'commandStack-changed', 'update:modelValue', 'change', 'canvas-viewbox-changed', 'element-click'],
  props: {
    modelValue: String, // xml 字符串
    processId: String,
    processName: String,
    translations: Object, // 自定义的翻译文件
    options: {
      type: Object,
      default: () => ({})
    }, // 自定义的翻译文件
    additionalModel: [Object, Array], // 自定义model
    moddleExtension: Object, // 自定义moddle
    onlyCustomizeAddi: {
      type: Boolean,
      default: false
    },
    onlyCustomizeModdle: {
      type: Boolean,
      default: false
    },
    simulation: {
      type: Boolean,
      default: true
    },
    keyboard: {
      type: Boolean,
      default: true
    },
    prefix: {
      type: String,
      default: "flowable"
    },
    events: {
      type: Array,
      default: () => ["element.click"]
    },
    headerButtonSize: {
      type: String,
      default: "small",
      validator: value => ["default", "medium", "small", "mini"].indexOf(value) !== -1
    },
    headerButtonType: {
      type: String,
      default: "primary",
      validator: value => ["default", "primary", "success", "warning", "danger", "info"].indexOf(value) !== -1
    }
  },
  data() {
    return {
      defaultZoom: 1,
      previewModelVisible: false,
      simulationStatus: false,
      previewResult: "",
      previewType: "xml",
      recoverable: false,
      revocable: false,
      cmOptions: {
        mode: 'xml', // 语言模式
        theme: 'monokai', // 主题
        lineNumbers: true, // 显示行号
        smartIndent: true, // 智能缩进
        readOnly: true,
        indentUnit: 2, // 智能缩进单位为4个空格长度
        foldGutter: true, // 启用行槽中的代码折叠
        styleActiveLine: true // 显示选中行的样式
      }
    };
  },
  computed: {
    additionalModules() {
      const Modules = [];
      // 仅保留用户自定义扩展模块
      if (this.onlyCustomizeAddi) {
        if (Object.prototype.toString.call(this.additionalModel) === "[object Array]") {
          return this.additionalModel || [];
        }
        return [this.additionalModel];
      }
      // 插入用户自定义扩展模块
      if (Object.prototype.toString.call(this.additionalModel) === "[object Array]") {
        Modules.push(...this.additionalModel);
      } else {
        this.additionalModel && Modules.push(this.additionalModel);
      }
      // 翻译模块
      const TranslateModule = {
        translate: ["value", customTranslate(this.translations || translationsCN)]
      };
      Modules.push(TranslateModule);
      // 模拟流转模块
      if (this.simulation) {
        Modules.push(tokenSimulation);
      }
      // 根据需要的流程类型设置扩展元素构建模块
      // if (this.prefix === "bpmn") {
      //   Modules.push(bpmnModdleExtension);
      // }
      if (this.prefix === "camunda") {
        Modules.push(camundaModdleExtension);
      }
      if (this.prefix === "flowable") {
        Modules.push(flowableModdleExtension);
      }
      if (this.prefix === "activiti") {
        Modules.push(activitiModdleExtension);
      }
      return Modules;
    },
    moddleExtensions() {
      const Extensions = {};
      // 仅使用用户自定义模块
      if (this.onlyCustomizeModdle) {
        return this.moddleExtension || null;
      }
      // 插入用户自定义模块
      if (this.moddleExtension) {
        for (let key in this.moddleExtension) {
          Extensions[key] = this.moddleExtension[key];
        }
      }
      // 根据需要的 "流程类型" 设置 对应的解析文件
      if (this.prefix === "activiti") {
        Extensions.activiti = activitiModdleDescriptor;
      }
      if (this.prefix === "flowable") {
        Extensions.flowable = flowableModdleDescriptor;
      }
      if (this.prefix === "camunda") {
        Extensions.camunda = camundaModdleDescriptor;
      }
      return Extensions;
    }
  },
  mounted() {
    this.initBpmnModeler();
    this.createNewDiagram(this.modelValue);
    // this.$once("hook:beforeUnmount", () => {
    //   if (this.bpmnModeler) this.bpmnModeler.destroy();
    //   this.$emit("destroy", this.bpmnModeler);
    //   this.bpmnModeler = null;
    // });
  },
  beforeUnmount() {
    if (this.bpmnModeler) this.bpmnModeler.destroy();
    this.$emit("destroy", this.bpmnModeler);
    this.bpmnModeler = null;
  },
  methods: {
    onSave () {
      return new Promise((resolve, reject) => {
        if (this.bpmnModeler == null) {
          reject();
        }
        this.bpmnModeler.saveXML({ format: true }).then(({ xml }) => {
          this.$emit('save', xml);
          resolve(xml);
        });
      })
    },
    initBpmnModeler() {
      if (this.bpmnModeler) return;
      this.bpmnModeler = new BpmnModeler({
        container: this.$refs["bpmn-canvas"],
        keyboard: this.keyboard ? { bindTo: document } : null,
        additionalModules: this.additionalModules,
        moddleExtensions: this.moddleExtensions,
        ...this.options
      });
      this.$emit("init-finished", this.bpmnModeler);
      this.initModelListeners();
    },
    initModelListeners() {
      const EventBus = this.bpmnModeler.get("eventBus");
      const that = this;
      // 注册需要的监听事件, 将. 替换为 - , 避免解析异常
      this.events.forEach(event => {
        EventBus.on(event, function(eventObj) {
          let eventName = event.replace(/\./g, "-");
          let element = eventObj ? eventObj.element : null;
          that.$emit(eventName, element, eventObj);
        });
      });
      // 监听图形改变返回xml
      EventBus.on("commandStack.changed", async event => {
        try {
          this.recoverable = this.bpmnModeler.get("commandStack").canRedo();
          this.revocable = this.bpmnModeler.get("commandStack").canUndo();
          let { xml } = await this.bpmnModeler.saveXML({ format: true });
          this.$emit("commandStack-changed", event);
          this.$emit('update:modelValue', xml);
          this.$emit("change", xml);
        } catch (e) {
          console.error(`[Process Designer Warn]: ${e.message || e}`);
        }
      });
      // 监听视图缩放变化
      this.bpmnModeler.on("canvas.viewbox.changed", ({ viewbox }) => {
        this.$emit("canvas-viewbox-changed", { viewbox });
        const { scale } = viewbox;
        this.defaultZoom = Math.floor(scale * 100) / 100;
      });
    },
    /* 创建新的流程图 */
    async createNewDiagram(xml) {
      // 将字符串转换成图显示出来
      let newId = this.processId || `Process_${new Date().getTime()}`;
      let newName = this.processName || `业务流程_${new Date().getTime()}`;
      let xmlString = xml || DefaultEmptyXML(newId, newName, this.prefix);
      try {
        let { warnings } = await this.bpmnModeler.importXML(xmlString);
        if (warnings && warnings.length) {
          warnings.forEach(warn => console.warn(warn));
        }
      } catch (e) {
        console.error(`[Process Designer Warn]: ${e?.message || e}`);
      }
    },
    // 下载流程图到本地
    /**
     * @param {string} type
     * @param {*} name
     */
    async downloadProcess(type, name) {
      try {
        const _this = this;
        // 按需要类型创建文件并下载
        if (type === "xml" || type === "bpmn") {
          const { err, xml } = await this.bpmnModeler.saveXML();
          // 读取异常时抛出异常
          if (err) {
            console.error(`[Process Designer Warn ]: ${err.message || err}`);
          }
          let { href, filename } = _this.setEncoded(type.toUpperCase(), name, xml);
          downloadFunc(href, filename);
        } else {
          const { err, svg } = await this.bpmnModeler.saveSVG();
          // 读取异常时抛出异常
          if (err) {
            return console.error(err);
          }
          let { href, filename } = _this.setEncoded("SVG", name, svg);
          downloadFunc(href, filename);
        }
      } catch (e) {
        console.error(`[Process Designer Warn ]: ${e.message || e}`);
      }
      // 文件下载方法
      function downloadFunc(href, filename) {
        if (href && filename) {
          let a = document.createElement("a");
          a.download = filename; //指定下载的文件名
          a.href = href; //  URL对象
          a.click(); // 模拟点击
          URL.revokeObjectURL(a.href); // 释放URL 对象
        }
      }
    },
    // 根据所需类型进行转码并返回下载地址
    setEncoded(type, filename = "diagram", data) {
      const encodedData = encodeURIComponent(data);
      return {
        filename: `${filename}.${type}`,
        href: `data:application/${type === "svg" ? "text/xml" : "bpmn20-xml"};charset=UTF-8,${encodedData}`,
        data: data
      };
    },
    // 加载本地文件
    importLocalFile() {
      const that = this;
      const file = this.$refs.refFile.files[0];
      const reader = new FileReader();
      reader.readAsText(file);
      reader.onload = function() {
        let xmlStr = this.result;
        that.createNewDiagram(xmlStr);
      };
    },
    /* ------------------------------------------------ refs methods ------------------------------------------------------ */
    downloadProcessAsXml() {
      this.downloadProcess("xml");
    },
    downloadProcessAsBpmn() {
      this.downloadProcess("bpmn");
    },
    downloadProcessAsSvg() {
      this.downloadProcess("svg");
    },
    processSimulation() {
      this.simulationStatus = !this.simulationStatus;
      this.simulation && this.bpmnModeler.get("toggleMode").toggleMode();
    },
    processRedo() {
      this.bpmnModeler.get("commandStack").redo();
    },
    processUndo() {
      this.bpmnModeler.get("commandStack").undo();
    },
    processZoomIn(zoomStep = 0.1) {
      let newZoom = Math.floor(this.defaultZoom * 100 + zoomStep * 100) / 100;
      if (newZoom > 4) {
        throw new Error("[Process Designer Warn ]: The zoom ratio cannot be greater than 4");
      }
      this.defaultZoom = newZoom;
      this.bpmnModeler.get("canvas").zoom(this.defaultZoom);
    },
    processZoomOut(zoomStep = 0.1) {
      let newZoom = Math.floor(this.defaultZoom * 100 - zoomStep * 100) / 100;
      if (newZoom < 0.2) {
        throw new Error("[Process Designer Warn ]: The zoom ratio cannot be less than 0.2");
      }
      this.defaultZoom = newZoom;
      this.bpmnModeler.get("canvas").zoom(this.defaultZoom);
    },
    processZoomTo(newZoom = 1) {
      if (newZoom < 0.2) {
        throw new Error("[Process Designer Warn ]: The zoom ratio cannot be less than 0.2");
      }
      if (newZoom > 4) {
        throw new Error("[Process Designer Warn ]: The zoom ratio cannot be greater than 4");
      }
      this.defaultZoom = newZoom;
      this.bpmnModeler.get("canvas").zoom(newZoom);
    },
    processReZoom() {
      this.defaultZoom = 1;
      this.bpmnModeler.get("canvas").zoom("fit-viewport", "auto");
    },
    processRestart() {
      this.recoverable = false;
      this.revocable = false;
      this.createNewDiagram(null);
    },
    elementsAlign(align) {
      const Align = this.bpmnModeler.get("alignElements");
      const Selection = this.bpmnModeler.get("selection");
      const SelectedElements = Selection.get();
      if (!SelectedElements || SelectedElements.length <= 1) {
        this.$message.warning("请按住 Ctrl 键选择多个元素对齐");
        return;
      }
      this.$confirm("自动对齐可能造成图形变形，是否继续？", "警告", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      }).then(() => Align.trigger(SelectedElements, align));
    },
    /*-----------------------------    方法结束     ---------------------------------*/
    previewProcessXML() {
      this.bpmnModeler.saveXML({ format: true }).then(({ xml }) => {
        this.previewResult = xml;
        this.previewType = 'xml';
        //this.cmOptions.mode = 'xml'
        this.previewModelVisible = true;
      });
    },
    previewProcessJson() {
      this.bpmnModeler.saveXML({ format: true }).then(({ xml }) => {
        this.previewResult = convert.xml2json(xml, { spaces: 2 });
        this.previewType = "json";
        this.previewModelVisible = true;
      });
    }
  }
};
</script>

<template>
  <div class="my-process-designer">
    <div class="my-process-designer__header">
      <slot name="control-header"></slot>
      <template v-if="!$slots['control-header']">
        <el-button-group key="file-control">
          <el-button :size="headerButtonSize" :type="headerButtonType" icon="el-icon-edit-outline" @click="onSave">保存流程</el-button>
          <el-button :size="headerButtonSize" :type="headerButtonType" :icon="FolderOpened" @click="refFile.click()">打开文件</el-button>
          <el-tooltip effect="light">
            <template #content>
              <el-button :size="headerButtonSize" type="primary" @click="downloadProcessAsXml()">下载为XML文件</el-button>
              <br />
              <el-button :size="headerButtonSize" type="primary" @click="downloadProcessAsSvg()">下载为SVG文件</el-button>
              <br />
              <el-button :size="headerButtonSize" type="primary" @click="downloadProcessAsBpmn()">下载为BPMN文件</el-button>
            </template>
            <el-button :size="headerButtonSize" :type="headerButtonType" :icon="Download">下载文件</el-button>
          </el-tooltip>
          <el-tooltip effect="light">
            <template #content>
              <el-button :size="headerButtonSize" type="primary" @click="previewProcessXML">预览XML</el-button>
              <br />
              <el-button :size="headerButtonSize" type="primary" @click="previewProcessJson">预览JSON</el-button>
            </template>
            <el-button :size="headerButtonSize" :type="headerButtonType" :icon="View">预览</el-button>
          </el-tooltip>
          <el-tooltip v-if="simulation" effect="light" :content="simulationStatus ? '退出模拟' : '开启模拟'">
            <el-button :size="headerButtonSize" :type="headerButtonType" :icon="Cpu" @click="processSimulation">
              模拟
            </el-button>
          </el-tooltip>
        </el-button-group>
        <el-button-group key="align-control">
          <el-tooltip effect="light" content="向左对齐">
            <el-button :size="headerButtonSize" class="align align-left" :icon="Histogram" @click="elementsAlign('left')" />
          </el-tooltip>
          <el-tooltip effect="light" content="向右对齐">
            <el-button :size="headerButtonSize" class="align align-right" :icon="Histogram" @click="elementsAlign('right')" />
          </el-tooltip>
          <el-tooltip effect="light" content="向上对齐">
            <el-button :size="headerButtonSize" class="align align-top" :icon="Histogram" @click="elementsAlign('top')" />
          </el-tooltip>
          <el-tooltip effect="light" content="向下对齐">
            <el-button :size="headerButtonSize" class="align align-bottom" :icon="Histogram" @click="elementsAlign('bottom')" />
          </el-tooltip>
          <el-tooltip effect="light" content="水平居中">
            <el-button :size="headerButtonSize" class="align align-center" :icon="Histogram" @click="elementsAlign('center')" />
          </el-tooltip>
          <el-tooltip effect="light" content="垂直居中">
            <el-button :size="headerButtonSize" class="align align-middle" :icon="Histogram" @click="elementsAlign('middle')" />
          </el-tooltip>
        </el-button-group>
        <el-button-group key="scale-control">
          <el-tooltip effect="light" content="缩小视图">
            <el-button :size="headerButtonSize" :disabled="defaultZoom < 0.2" :icon="ZoomOut" @click="processZoomOut()" />
          </el-tooltip>
          <el-button :size="headerButtonSize">{{ Math.floor(defaultZoom * 10 * 10) + "%" }}</el-button>
          <el-tooltip effect="light" content="放大视图">
            <el-button :size="headerButtonSize" :disabled="defaultZoom > 4" :icon="ZoomIn" @click="processZoomIn()" />
          </el-tooltip>
          <el-tooltip effect="light" content="重置视图并居中">
            <el-button :size="headerButtonSize" :icon="ScaleToOriginal" @click="processReZoom()" />
          </el-tooltip>
        </el-button-group>
        <el-button-group key="stack-control">
          <el-tooltip effect="light" content="撤销">
            <el-button :size="headerButtonSize" :disabled="!revocable" :icon="RefreshLeft" @click="processUndo()" />
          </el-tooltip>
          <el-tooltip effect="light" content="恢复">
            <el-button :size="headerButtonSize" :disabled="!recoverable" :icon="RefreshRight" @click="processRedo()" />
          </el-tooltip>
          <el-tooltip effect="light" content="重新绘制">
            <el-button :size="headerButtonSize" :icon="Refresh" @click="processRestart" />
          </el-tooltip>
        </el-button-group>
      </template>
      <!-- 用于打开本地文件-->
      <input type="file" id="files" ref="refFile" style="display: none" accept=".xml, .bpmn" @change="importLocalFile" />
    </div>
    <div class="my-process-designer__container">
      <div class="my-process-designer__canvas" id = "bpmnCanvas" ref="bpmnCanvas"></div>
    </div>
    <el-dialog title="预览" width="60%" v-model="previewModelVisible" append-to-body destroy-on-close>
      <highlightjs :language="previewType" :code="previewResult" style="height: 80vh" />
    </el-dialog>
    <!--<el-dialog :title="`预览${previewType}`" width="60%" v-model="previewModelVisible" append-to-body destroy-on-close>
        <Codemirror
          v-model:value="previewResult"
          :options="cmOptions"
          border
          :height="700"
        />
    </el-dialog>-->
  </div>
</template>
<script lang="ts" setup>
import { Histogram, Cpu, Refresh, RefreshLeft, RefreshRight, ZoomOut, ZoomIn, View, Download, FolderOpened, ScaleToOriginal } from '@element-plus/icons-vue'
import { ElMessage, ElMessageBox } from 'element-plus'
import BpmnModeler from "bpmn-js/lib/Modeler";
import DefaultEmptyXML from "./plugins/defaultEmpty";
// 翻译方法
import customTranslate from "./plugins/translate/customTranslate";
import translationsCN from "./plugins/translate/zh";
// 模拟流转流程
import tokenSimulation from "bpmn-js-token-simulation";
// 标签解析构建器
// import bpmnPropertiesProvider from "bpmn-js-properties-panel/lib/provider/bpmn";
// 标签解析 Moddle
import camundaModdleDescriptor from './plugins/descriptor/camundaDescriptor.json';
import activitiModdleDescriptor from './plugins/descriptor/activitiDescriptor.json';
import flowableModdleDescriptor from './plugins/descriptor/flowableDescriptor.json';
// 标签解析 Extension
import camundaModdleExtension from './plugins/extension-moddle/camunda';
import activitiModdleExtension from './plugins/extension-moddle/activiti';
import flowableModdleExtension from './plugins/extension-moddle/flowable';
// 引入json转换与高亮
// import X2JS from "x2js";
import convert from "xml-js";
import Codemirror from 'codemirror-editor-vue3';
import 'codemirror/theme/monokai.css'
import 'codemirror/mode/javascript/javascript.js';
import 'codemirror/mode/xml/xml.js';
defineOptions({ name: 'MyProcessDesigner' })
const refFile = ref()
const emit = defineEmits([
  'destroy',
  'init-finished',
  'commandStack-changed',
  'update:modelValue',
  'change',
  'canvas-viewbox-changed',
  'element-click'
])
const props = defineProps({
  modelValue: String, // xml 字符串
  processId: String, // 流程 key 标识
  processName: String, // 流程 name 名字
  formId: Number, // 流程 form 表单编号
  translations: {
    // 自定义的翻译文件
    type: Object,
    default: () => {}
  },
  options: {
    type: Object,
    default: () => ({})
  }, // 自定义的翻译文件
  additionalModel: [Object, Array], // 自定义model
  moddleExtension: {
    // 自定义moddle
    type: Object,
    default: () => {}
  },
  onlyCustomizeAddi: {
    type: Boolean,
    default: false
  },
  onlyCustomizeModdle: {
    type: Boolean,
    default: false
  },
  simulation: {
    type: Boolean,
    default: true
  },
  keyboard: {
    type: Boolean,
    default: true
  },
  prefix: {
    type: String,
    default: 'flowable'
  },
  events: {
    type: Array,
    default: () => ['element.click']
  },
  headerButtonSize: {
    type: String,
    default: 'small',
    validator: (value: string) => ['default', 'medium', 'small', 'mini'].indexOf(value) !== -1
  },
  headerButtonType: {
    type: String,
    default: 'primary',
    validator: (value: string) =>
      ['default', 'primary', 'success', 'warning', 'danger', 'info'].indexOf(value) !== -1
  }
})
let bpmnModeler: any = null
const defaultZoom = ref(1)
const previewModelVisible = ref(false)
const simulationStatus = ref(false)
const previewResult = ref('')
const previewType = ref('xml')
const recoverable = ref(false)
const revocable = ref(false)
const cmOptions = ref({
  mode: 'xml', // 语言模式
        theme: 'monokai', // 主题
        lineNumbers: true, // 显示行号
        smartIndent: true, // 智能缩进
        readOnly: true,
        indentUnit: 2, // 智能缩进单位为4个空格长度
        foldGutter: true, // 启用行槽中的代码折叠
        styleActiveLine: true // 显示选中行的样式
})
const additionalModules = computed(() => {
  const Modules: any[] = []
  // 仅保留用户自定义扩展模块
  if (props.onlyCustomizeAddi) {
    if (Object.prototype.toString.call(props.additionalModel) == '[object Array]') {
      return props.additionalModel || []
    }
    return [props.additionalModel]
  }
  // 插入用户自定义扩展模块
  if (Object.prototype.toString.call(props.additionalModel) == '[object Array]') {
    Modules.push(...(props.additionalModel as any[]))
  } else {
    props.additionalModel && Modules.push(props.additionalModel)
  }
  // 翻译模块
  const TranslateModule = {
    translate: ['value', customTranslate(props.translations || translationsCN)]
  }
  Modules.push(TranslateModule)
  // 模拟流转模块
  if (props.simulation) {
    Modules.push(tokenSimulation)
  }
  // 根据需要的流程类型设置扩展元素构建模块
  // if (this.prefix === "bpmn") {
  //   Modules.push(bpmnModdleExtension);
  // }
  if (props.prefix === 'camunda') {
    Modules.push(camundaModdleExtension)
  }
  if (props.prefix === 'flowable') {
    Modules.push(flowableModdleExtension)
  }
  if (props.prefix === 'activiti') {
    Modules.push(activitiModdleExtension)
  }
  return Modules
})
const moddleExtensions = computed(() => {
  const Extensions: any = {}
  // 仅使用用户自定义模块
  if (props.onlyCustomizeModdle) {
    return props.moddleExtension || null
  }
  // 插入用户自定义模块
  if (props.moddleExtension) {
    for (let key in props.moddleExtension) {
      Extensions[key] = props.moddleExtension[key]
    }
  }
  // 根据需要的 "流程类型" 设置 对应的解析文件
  if (props.prefix === 'activiti') {
    Extensions.activiti = activitiModdleDescriptor
  }
  if (props.prefix === 'flowable') {
    Extensions.flowable = flowableModdleDescriptor
  }
  if (props.prefix === 'camunda') {
    Extensions.camunda = camundaModdleDescriptor
  }
  return Extensions
})
const onSave = async () => {
      return new Promise((resolve, reject) => {
        if (bpmnModeler == null) {
          reject();
        }
        bpmnModeler.saveXML({ format: true }).then(({ xml }) => {
          // 触发 save 事件
          emit('save', xml)
          resolve(xml);
        });
      })
}
const initBpmnModeler = () => {
  if (bpmnModeler) return
  let container = document.getElementById('bpmnCanvas')
  bpmnModeler = new BpmnModeler({
    container: container,
    keyboard: props.keyboard ? { bindTo: document } : null,
    additionalModules: additionalModules.value,
    moddleExtensions: moddleExtensions.value,
    ...props.options
  })
  console.log("initBpmnModeler bpmnModeler",bpmnModeler)
  emit('init-finished', bpmnModeler)
  initModelListeners()
}
const initModelListeners = () => {
  const EventBus = bpmnModeler.get('eventBus')
  // 注册需要的监听事件, 将. 替换为 - , 避免解析异常
  props.events.forEach((event: any) => {
    EventBus.on(event, function (eventObj) {
      let eventName = event.replace(/\./g, '-')
      let element = eventObj ? eventObj.element : null
      emit('element-click', element, eventObj)
      // emit(eventName, element, eventObj)
    })
  })
  // 监听图形改变返回xml
  EventBus.on('commandStack.changed', async (event) => {
    try {
      recoverable.value = bpmnModeler.get('commandStack').canRedo()
      revocable.value = bpmnModeler.get('commandStack').canUndo()
      let { xml } = await bpmnModeler.saveXML({ format: true })
      emit('commandStack-changed', event)
      emit('update:modelValue', xml)
      emit('change', xml)
    } catch (e: any) {
      console.error(`[Process Designer Warn]: ${e.message || e}`)
    }
  })
  // 监听视图缩放变化
  bpmnModeler.on('canvas.viewbox.changed', ({ viewbox }) => {
    emit('canvas-viewbox-changed', { viewbox })
    const { scale } = viewbox
    defaultZoom.value = Math.floor(scale * 100) / 100
  })
}
/* 创建新的流程图 */
const createNewDiagram = async (xml) => {
  // 将字符串转换成图显示出来
  let newId = props.processId || `Process_${new Date().getTime()}`
  let newName = props.processName || `业务流程_${new Date().getTime()}`
  let xmlString = xml || DefaultEmptyXML(newId, newName, props.prefix)
  try {
    let { warnings } = await bpmnModeler.importXML(xmlString)
    if (warnings && warnings.length) {
      warnings.forEach((warn) => console.warn(warn))
    }
  } catch (e: any) {
    console.error(`[Process Designer Warn]: ${e.message || e}`)
  }
}
// 下载流程图到本地
    /**
     * @param {string} type
     * @param {*} name
     */
const downloadProcess = async (type, name) => {
  try {
    // 按需要类型创建文件并下载
    if (type === 'xml' || type === 'bpmn') {
      const { err, xml } = await bpmnModeler.saveXML()
      // 读取异常时抛出异常
      if (err) {
        console.error(`[Process Designer Warn ]: ${err.message || err}`)
      }
      let { href, filename } = setEncoded(type.toUpperCase(), name, xml)
      downloadFunc(href, filename)
    } else {
      const { err, svg } = await bpmnModeler.saveSVG()
      // 读取异常时抛出异常
      if (err) {
        return console.error(err)
      }
      let { href, filename } = setEncoded('SVG', name, svg)
      downloadFunc(href, filename)
    }
  } catch (e: any) {
    console.error(`[Process Designer Warn ]: ${e.message || e}`)
  }
  // 文件下载方法
  function downloadFunc(href, filename) {
    if (href && filename) {
      let a = document.createElement('a')
      a.download = filename //指定下载的文件名
      a.href = href //  URL对象
      a.click() // 模拟点击
      URL.revokeObjectURL(a.href) // 释放URL 对象
    }
  }
}
// 根据所需类型进行转码并返回下载地址
const setEncoded = (type, filename = 'diagram', data) => {
  const encodedData = encodeURIComponent(data)
  return {
    filename: `${filename}.${type}`,
    href: `data:application/${type === "svg" ? "text/xml" : "bpmn20-xml"};charset=UTF-8,${encodedData}`,
    data: data
  }
}
// 加载本地文件
const importLocalFile = () => {
  const file = refFile.value.files[0]
  const reader = new FileReader()
  reader.readAsText(file)
  reader.onload = function () {
    let xmlStr = this.result
    createNewDiagram(xmlStr)
  }
}
/* ------------------------------------------------ refs methods ------------------------------------------------------ */
const downloadProcessAsXml = () => {
  downloadProcess('xml')
}
const downloadProcessAsBpmn = () => {
  downloadProcess('bpmn')
}
const downloadProcessAsSvg = () => {
  downloadProcess('svg')
}
const processSimulation = () => {
  simulationStatus.value = !simulationStatus.value
  props.simulation && bpmnModeler.get('toggleMode').toggleMode()
}
const processRedo = () => {
  bpmnModeler.get('commandStack').redo()
}
const processUndo = () => {
  bpmnModeler.get('commandStack').undo()
}
const processZoomIn = (zoomStep = 0.1) => {
  let newZoom = Math.floor(defaultZoom.value * 100 + zoomStep * 100) / 100
  if (newZoom > 4) {
    throw new Error('[Process Designer Warn ]: The zoom ratio cannot be greater than 4')
  }
  defaultZoom.value = newZoom
  bpmnModeler.get('canvas').zoom(defaultZoom.value)
}
const processZoomOut = (zoomStep = 0.1) => {
  let newZoom = Math.floor(defaultZoom.value * 100 - zoomStep * 100) / 100
  if (newZoom < 0.2) {
    throw new Error('[Process Designer Warn ]: The zoom ratio cannot be less than 0.2')
  }
  defaultZoom.value = newZoom
  bpmnModeler.get('canvas').zoom(defaultZoom.value)
}
const processZoomTo = (newZoom = 1) => {
      if (newZoom < 0.2) {
        throw new Error("[Process Designer Warn ]: The zoom ratio cannot be less than 0.2");
      }
      if (newZoom > 4) {
        throw new Error("[Process Designer Warn ]: The zoom ratio cannot be greater than 4");
      }
      defaultZoom.value = newZoom;
      bpmnModeler.get("canvas").zoom(newZoom);
}
const processReZoom = () => {
  defaultZoom.value = 1
  bpmnModeler.get('canvas').zoom('fit-viewport', 'auto')
}
const processRestart = () => {
  recoverable.value = false
  revocable.value = false
  createNewDiagram(null)
}
const elementsAlign = (align) => {
  const Align = bpmnModeler.get('alignElements')
  const Selection = bpmnModeler.get('selection')
  const SelectedElements = Selection.get()
  if (!SelectedElements || SelectedElements.length <= 1) {
    ElMessage.warning('请按住 Shift 键选择多个元素对齐')
    return
  }
  ElMessageBox.confirm('自动对齐可能造成图形变形，是否继续？', '警告', {
    confirmButtonText: '确定',
    cancelButtonText: '取消',
    type: 'warning'
  }).then(() => {
    Align.trigger(SelectedElements, align)
  })
}
/*-----------------------------    方法结束     ---------------------------------*/
const previewProcessXML = () => {
  bpmnModeler.saveXML({ format: true }).then(({ xml }) => {
    previewResult.value = xml
    previewType.value = 'xml'
    //cmOptions.value['mode'] = 'xml'
    previewModelVisible.value = true
  })
}
const previewProcessJson = () => {
  bpmnModeler.saveXML({ format: true }).then(({ xml }) => {
    previewResult.value = convert.xml2json(xml, { spaces: 2 });
    previewType.value = "json";
    previewModelVisible.value = true;
  })
}
onMounted(() => {
  initBpmnModeler()
  createNewDiagram(props.modelValue)
})
onBeforeUnmount(() => {
  if (bpmnModeler) bpmnModeler.destroy()
  emit('destroy', bpmnModeler)
  bpmnModeler = null
})
</script>