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+<template>
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+ <div class="my-process-designer">
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+ <div class="my-process-designer__header">
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+ <slot name="control-header"></slot>
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+ <template v-if="!$slots['control-header']">
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+ <el-button-group key="file-control">
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+ <el-button :size="headerButtonSize" :type="headerButtonType" icon="el-icon-folder-opened" @click="$refs.refFile.click()">打开文件</el-button>
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+ <el-tooltip effect="light">
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+ <div slot="content">
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+ <el-button :size="headerButtonSize" type="text" @click="downloadProcessAsXml()">下载为XML文件</el-button>
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+ <br />
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+ <el-button :size="headerButtonSize" type="text" @click="downloadProcessAsSvg()">下载为SVG文件</el-button>
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+ <br />
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+ <el-button :size="headerButtonSize" type="text" @click="downloadProcessAsBpmn()">下载为BPMN文件</el-button>
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+ </div>
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+ <el-button :size="headerButtonSize" :type="headerButtonType" icon="el-icon-download">下载文件</el-button>
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+ </el-tooltip>
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+ <el-tooltip effect="light">
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+ <div slot="content">
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+ <el-button :size="headerButtonSize" type="text" @click="previewProcessXML">预览XML</el-button>
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+ <br />
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+ <el-button :size="headerButtonSize" type="text" @click="previewProcessJson">预览JSON</el-button>
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+ </div>
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+ <el-button :size="headerButtonSize" :type="headerButtonType" icon="el-icon-view">预览</el-button>
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+ </el-tooltip>
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+ <el-tooltip v-if="simulation" effect="light" :content="this.simulationStatus ? '退出模拟' : '开启模拟'">
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+ <el-button :size="headerButtonSize" :type="headerButtonType" icon="el-icon-cpu" @click="processSimulation">
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+ 模拟
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+ </el-button>
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+ </el-tooltip>
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+ </el-button-group>
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+ <el-button-group key="align-control">
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+ <el-tooltip effect="light" content="向左对齐">
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+ <el-button :size="headerButtonSize" class="align align-left" icon="el-icon-s-data" @click="elementsAlign('left')" />
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+ </el-tooltip>
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+ <el-tooltip effect="light" content="向右对齐">
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+ <el-button :size="headerButtonSize" class="align align-right" icon="el-icon-s-data" @click="elementsAlign('right')" />
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+ </el-tooltip>
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+ <el-tooltip effect="light" content="向上对齐">
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+ <el-button :size="headerButtonSize" class="align align-top" icon="el-icon-s-data" @click="elementsAlign('top')" />
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+ </el-tooltip>
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+ <el-tooltip effect="light" content="向下对齐">
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+ <el-button :size="headerButtonSize" class="align align-bottom" icon="el-icon-s-data" @click="elementsAlign('bottom')" />
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+ </el-tooltip>
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+ <el-tooltip effect="light" content="水平居中">
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+ <el-button :size="headerButtonSize" class="align align-center" icon="el-icon-s-data" @click="elementsAlign('center')" />
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+ </el-tooltip>
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+ <el-tooltip effect="light" content="垂直居中">
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+ <el-button :size="headerButtonSize" class="align align-middle" icon="el-icon-s-data" @click="elementsAlign('middle')" />
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+ </el-tooltip>
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+ </el-button-group>
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+ <el-button-group key="scale-control">
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+ <el-tooltip effect="light" content="缩小视图">
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+ <el-button :size="headerButtonSize" :disabled="defaultZoom < 0.2" icon="el-icon-zoom-out" @click="processZoomOut()" />
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+ </el-tooltip>
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+ <el-button :size="headerButtonSize">{{ Math.floor(this.defaultZoom * 10 * 10) + "%" }}</el-button>
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+ <el-tooltip effect="light" content="放大视图">
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+ <el-button :size="headerButtonSize" :disabled="defaultZoom > 4" icon="el-icon-zoom-in" @click="processZoomIn()" />
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+ </el-tooltip>
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+ <el-tooltip effect="light" content="重置视图并居中">
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+ <el-button :size="headerButtonSize" icon="el-icon-c-scale-to-original" @click="processReZoom()" />
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+ </el-tooltip>
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+ </el-button-group>
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+ <el-button-group key="stack-control">
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+ <el-tooltip effect="light" content="撤销">
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+ <el-button :size="headerButtonSize" :disabled="!revocable" icon="el-icon-refresh-left" @click="processUndo()" />
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+ </el-tooltip>
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+ <el-tooltip effect="light" content="恢复">
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+ <el-button :size="headerButtonSize" :disabled="!recoverable" icon="el-icon-refresh-right" @click="processRedo()" />
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+ </el-tooltip>
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+ <el-tooltip effect="light" content="重新绘制">
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+ <el-button :size="headerButtonSize" icon="el-icon-refresh" @click="processRestart" />
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+ </el-tooltip>
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+ </el-button-group>
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+ </template>
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+ <!-- 用于打开本地文件-->
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+ <input type="file" id="files" ref="refFile" style="display: none" accept=".xml, .bpmn" @change="importLocalFile" />
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+ </div>
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+ <div class="my-process-designer__container">
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+ <div class="my-process-designer__canvas" ref="bpmn-canvas"></div>
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+ </div>
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+ <el-dialog title="预览" width="60%" :visible.sync="previewModelVisible" append-to-body destroy-on-close>
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+ <highlightjs :language="previewType" :code="previewResult" />
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+ </el-dialog>
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+ </div>
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+</template>
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+
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+<script>
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+import BpmnModeler from "bpmn-js/lib/Modeler";
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+import DefaultEmptyXML from "./plugins/defaultEmpty";
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+// 翻译方法
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+import customTranslate from "./plugins/translate/customTranslate";
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+import translationsCN from "./plugins/translate/zh";
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+// 模拟流转流程
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+import tokenSimulation from "bpmn-js-token-simulation";
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+// 标签解析构建器
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+// import bpmnPropertiesProvider from "bpmn-js-properties-panel/lib/provider/bpmn";
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+// 标签解析 Moddle
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+import camundaModdleDescriptor from "./plugins/descriptor/camundaDescriptor.json";
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+import activitiModdleDescriptor from "./plugins/descriptor/activitiDescriptor.json";
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+import flowableModdleDescriptor from "./plugins/descriptor/flowableDescriptor.json";
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+// 标签解析 Extension
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+import camundaModdleExtension from "./plugins/extension-moddle/camunda";
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+import activitiModdleExtension from "./plugins/extension-moddle/activiti";
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+import flowableModdleExtension from "./plugins/extension-moddle/flowable";
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+// 引入json转换与高亮
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+import convert from "xml-js";
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+
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+export default {
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+ name: "MyProcessDesigner",
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+ componentName: "MyProcessDesigner",
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+ props: {
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+ value: String, // xml 字符串
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+ processId: String,
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+ processName: String,
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+ translations: Object, // 自定义的翻译文件
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+ additionalModel: [Object, Array], // 自定义model
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+ moddleExtension: Object, // 自定义moddle
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+ onlyCustomizeAddi: {
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+ type: Boolean,
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+ default: false
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+ },
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+ onlyCustomizeModdle: {
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+ type: Boolean,
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+ default: false
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+ },
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+ simulation: {
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+ type: Boolean,
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+ default: true
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+ },
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+ keyboard: {
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+ type: Boolean,
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+ default: true
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+ },
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+ prefix: {
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+ type: String,
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+ default: "camunda"
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+ },
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+ events: {
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+ type: Array,
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+ default: () => ["element.click"]
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+ },
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+ headerButtonSize: {
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+ type: String,
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+ default: "small",
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+ validator: value => ["default", "medium", "small", "mini"].indexOf(value) !== -1
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+ },
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+ headerButtonType: {
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+ type: String,
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+ default: "primary",
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+ validator: value => ["default", "primary", "success", "warning", "danger", "info"].indexOf(value) !== -1
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+ }
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+ },
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+ data() {
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+ return {
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+ defaultZoom: 1,
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+ previewModelVisible: false,
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+ simulationStatus: false,
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+ previewResult: "",
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+ previewType: "xml",
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+ recoverable: false,
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+ revocable: false
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+ };
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+ },
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+ computed: {
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+ additionalModules() {
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+ const Modules = [];
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+ // 仅保留用户自定义扩展模块
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+ if (this.onlyCustomizeAddi) {
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+ if (Object.prototype.toString.call(this.additionalModel) === "[object Array]") {
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+ return this.additionalModel || [];
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+ }
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+ return [this.additionalModel];
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+ }
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+
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+ // 插入用户自定义扩展模块
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+ if (Object.prototype.toString.call(this.additionalModel) === "[object Array]") {
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+ Modules.push(...this.additionalModel);
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+ } else {
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+ this.additionalModel && Modules.push(this.additionalModel);
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+ }
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+
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+ // 翻译模块
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+ const TranslateModule = {
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+ translate: ["value", customTranslate(this.translations || translationsCN)]
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+ };
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+ Modules.push(TranslateModule);
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+
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+ // 模拟流转模块
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+ if (this.simulation) {
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+ Modules.push(tokenSimulation);
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+ }
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+
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+ // 根据需要的流程类型设置扩展元素构建模块
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+ // if (this.prefix === "bpmn") {
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+ // Modules.push(bpmnModdleExtension);
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+ // }
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+ if (this.prefix === "camunda") {
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+ Modules.push(camundaModdleExtension);
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+ }
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+ if (this.prefix === "flowable") {
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+ Modules.push(flowableModdleExtension);
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+ }
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+ if (this.prefix === "activiti") {
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+ Modules.push(activitiModdleExtension);
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+ }
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+
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+ return Modules;
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+ },
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+ moddleExtensions() {
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+ const Extensions = {};
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+ // 仅使用用户自定义模块
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+ if (this.onlyCustomizeModdle) {
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+ return this.moddleExtension || null;
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+ }
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+
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+ // 插入用户自定义模块
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+ if (this.moddleExtension) {
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+ for (let key in this.moddleExtension) {
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+ Extensions[key] = this.moddleExtension[key];
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+ }
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+ }
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+
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+ // 根据需要的 "流程类型" 设置 对应的解析文件
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+ if (this.prefix === "activiti") {
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+ Extensions.activiti = activitiModdleDescriptor;
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+ }
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+ if (this.prefix === "flowable") {
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+ Extensions.flowable = flowableModdleDescriptor;
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+ }
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+ if (this.prefix === "camunda") {
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+ Extensions.camunda = camundaModdleDescriptor;
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+ }
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+
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+ return Extensions;
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+ }
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+ },
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+ mounted() {
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+ this.initBpmnModeler();
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+ this.createNewDiagram(this.value);
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+ this.$once("hook:beforeDestroy", () => {
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+ if (this.bpmnModeler) this.bpmnModeler.destroy();
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+ this.$emit("destroy", this.bpmnModeler);
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+ this.bpmnModeler = null;
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+ });
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+ },
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+ methods: {
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+ initBpmnModeler() {
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+ if (this.bpmnModeler) return;
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+ this.bpmnModeler = new BpmnModeler({
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+ container: this.$refs["bpmn-canvas"],
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+ keyboard: this.keyboard ? { bindTo: document } : null,
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+ additionalModules: this.additionalModules,
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+ moddleExtensions: this.moddleExtensions
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+ });
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+ this.$emit("init-finished", this.bpmnModeler);
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+ this.initModelListeners();
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+ },
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+ initModelListeners() {
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+ const EventBus = this.bpmnModeler.get("eventBus");
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+ const that = this;
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+ // 注册需要的监听事件, 将. 替换为 - , 避免解析异常
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+ this.events.forEach(event => {
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+ EventBus.on(event, function(eventObj) {
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+ let eventName = event.replace(/\./g, "-");
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+ let element = eventObj ? eventObj.element : null;
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+ that.$emit(eventName, element, eventObj);
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+ });
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+ });
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+ // 监听图形改变返回xml
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+ EventBus.on("commandStack.changed", async event => {
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+ try {
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+ this.recoverable = this.bpmnModeler.get("commandStack").canRedo();
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+ this.revocable = this.bpmnModeler.get("commandStack").canUndo();
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+ let { xml } = await this.bpmnModeler.saveXML({ format: true });
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+ this.$emit("commandStack-changed", event);
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+ this.$emit("input", xml);
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+ this.$emit("change", xml);
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+ } catch (e) {
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+ console.error(`[Process Designer Warn]: ${e.message || e}`);
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+ }
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+ });
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+ // 监听视图缩放变化
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+ this.bpmnModeler.on("canvas.viewbox.changed", ({ viewbox }) => {
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+ this.$emit("canvas-viewbox-changed", { viewbox });
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+ const { scale } = viewbox;
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+ this.defaultZoom = Math.floor(scale * 100) / 100;
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+ });
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+ },
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+ /* 创建新的流程图 */
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+ async createNewDiagram(xml) {
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+ // 将字符串转换成图显示出来
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+ let newId = this.processId || `Process_${new Date().getTime()}`;
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+ let newName = this.processName || `业务流程_${new Date().getTime()}`;
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+ let xmlString = xml || DefaultEmptyXML(newId, newName, this.prefix);
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+ try {
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+ console.log(this.bpmnModeler.importXML);
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+ let { warnings } = await this.bpmnModeler.importXML(xmlString);
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+ if (warnings && warnings.length) {
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+ warnings.forEach(warn => console.warn(warn));
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+ }
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+ } catch (e) {
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+ console.error(`[Process Designer Warn]: ${e?.message || e}`);
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+ }
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+ },
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+
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+ // 下载流程图到本地
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+ async downloadProcess(type, name) {
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+ try {
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+ const _this = this;
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+ // 按需要类型创建文件并下载
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+ if (type === "xml" || type === "bpmn") {
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+ const { err, xml } = await this.bpmnModeler.saveXML();
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+ // 读取异常时抛出异常
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+ if (err) {
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+ console.error(`[Process Designer Warn ]: ${err.message || err}`);
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+ }
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+ let { href, filename } = _this.setEncoded(type.toUpperCase(), name, xml);
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+ downloadFunc(href, filename);
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+ } else {
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+ const { err, svg } = await this.bpmnModeler.saveSVG();
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+ // 读取异常时抛出异常
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+ if (err) {
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+ return console.error(err);
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+ }
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+ let { href, filename } = _this.setEncoded("SVG", name, svg);
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+ downloadFunc(href, filename);
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+ }
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+ } catch (e) {
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+ console.error(`[Process Designer Warn ]: ${e.message || e}`);
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+ }
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+ // 文件下载方法
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+ function downloadFunc(href, filename) {
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+ if (href && filename) {
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+ let a = document.createElement("a");
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+ a.download = filename; //指定下载的文件名
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+ a.href = href; // URL对象
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+ a.click(); // 模拟点击
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+ URL.revokeObjectURL(a.href); // 释放URL 对象
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+ }
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+ }
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+ },
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+
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+ // 根据所需类型进行转码并返回下载地址
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+ setEncoded(type, filename = "diagram", data) {
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+ const encodedData = encodeURIComponent(data);
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+ return {
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+ filename: `${filename}.${type}`,
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+ href: `data:application/${type === "svg" ? "text/xml" : "bpmn20-xml"};charset=UTF-8,${encodedData}`,
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+ data: data
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+ };
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+ },
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+
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+ // 加载本地文件
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+ importLocalFile() {
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+ const that = this;
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+ const file = this.$refs.refFile.files[0];
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+ const reader = new FileReader();
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+ reader.readAsText(file);
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+ reader.onload = function() {
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+ let xmlStr = this.result;
|
|
|
+ that.createNewDiagram(xmlStr);
|
|
|
+ };
|
|
|
+ },
|
|
|
+ /* ------------------------------------------------ refs methods ------------------------------------------------------ */
|
|
|
+ downloadProcessAsXml() {
|
|
|
+ this.downloadProcess("xml");
|
|
|
+ },
|
|
|
+ downloadProcessAsBpmn() {
|
|
|
+ this.downloadProcess("bpmn");
|
|
|
+ },
|
|
|
+ downloadProcessAsSvg() {
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|
|
+ this.downloadProcess("svg");
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|
|
+ },
|
|
|
+ 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.previewModelVisible = true;
|
|
|
+ });
|
|
|
+ },
|
|
|
+ previewProcessJson() {
|
|
|
+ this.bpmnModeler.saveXML({ format: true }).then(({ xml }) => {
|
|
|
+ this.previewResult = convert.xml2json(xml, { spaces: 2 });
|
|
|
+ this.previewType = "json";
|
|
|
+ this.previewModelVisible = true;
|
|
|
+ });
|
|
|
+ }
|
|
|
+ }
|
|
|
+};
|
|
|
+</script>
|