修改

src/components/bpmnProcessDesigner/package/penal/flow-condition/FlowCondition.vue

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+<template>
+  <div class="panel-tab__content">
+    <el-form :model="flowConditionForm" label-width="90px" size="mini" @submit.native.prevent>
+      <el-form-item label="流转类型">
+        <el-select v-model="flowConditionForm.type" @change="updateFlowType">
+          <el-option label="普通流转路径" value="normal" />
+          <el-option label="默认流转路径" value="default" />
+          <el-option label="条件流转路径" value="condition" />
+        </el-select>
+      </el-form-item>
+      <el-form-item label="条件格式" v-if="flowConditionForm.type === 'condition'" key="condition">
+        <el-select v-model="flowConditionForm.conditionType">
+          <el-option label="表达式" value="expression" />
+          <el-option label="脚本" value="script" />
+        </el-select>
+      </el-form-item>
+      <el-form-item label="表达式" v-if="flowConditionForm.conditionType && flowConditionForm.conditionType === 'expression'" key="express">
+        <el-input v-model="flowConditionForm.body" style="width:192px;"  clearable @change="updateFlowCondition" />
+      </el-form-item>
+      <template v-if="flowConditionForm.conditionType && flowConditionForm.conditionType === 'script'">
+        <el-form-item label="脚本语言" key="language">
+          <el-input v-model="flowConditionForm.language" clearable @change="updateFlowCondition" />
+        </el-form-item>
+        <el-form-item label="脚本类型" key="scriptType">
+          <el-select v-model="flowConditionForm.scriptType">
+            <el-option label="内联脚本" value="inlineScript" />
+            <el-option label="外部脚本" value="externalScript" />
+          </el-select>
+        </el-form-item>
+        <el-form-item label="脚本" v-if="flowConditionForm.scriptType === 'inlineScript'" key="body">
+          <el-input v-model="flowConditionForm.body" type="textarea" clearable @change="updateFlowCondition" />
+        </el-form-item>
+        <el-form-item label="资源地址" v-if="flowConditionForm.scriptType === 'externalScript'" key="resource">
+          <el-input v-model="flowConditionForm.resource" clearable @change="updateFlowCondition" />
+        </el-form-item>
+      </template>
+    </el-form>
+  </div>
+</template>
+
+<script>
+export default {
+  name: "FlowCondition",
+  props: {
+    businessObject: Object,
+    type: String
+  },
+  data() {
+    return {
+      flowConditionForm: {}
+    };
+  },
+  watch: {
+    businessObject: {
+      immediate: true,
+      handler() {
+        this.$nextTick(() => this.resetFlowCondition());
+      }
+    }
+  },
+  methods: {
+    resetFlowCondition() {
+      this.bpmnElement = window.bpmnInstances.bpmnElement;
+      this.bpmnElementSource = this.bpmnElement.source;
+      this.bpmnElementSourceRef = this.bpmnElement.businessObject.sourceRef;
+      if (this.bpmnElementSourceRef && this.bpmnElementSourceRef.default && this.bpmnElementSourceRef.default.id === this.bpmnElement.id) {
+        // 默认
+        this.flowConditionForm = { type: "default" };
+      } else if (!this.bpmnElement.businessObject.conditionExpression) {
+        // 普通
+        this.flowConditionForm = { type: "normal" };
+      } else {
+        // 带条件
+        const conditionExpression = this.bpmnElement.businessObject.conditionExpression;
+        this.flowConditionForm = { ...conditionExpression, type: "condition" };
+        // resource 可直接标识 是否是外部资源脚本
+        if (this.flowConditionForm.resource) {
+          this.$set(this.flowConditionForm, "conditionType", "script");
+          this.$set(this.flowConditionForm, "scriptType", "externalScript");
+          return;
+        }
+        if (conditionExpression.language) {
+          this.$set(this.flowConditionForm, "conditionType", "script");
+          this.$set(this.flowConditionForm, "scriptType", "inlineScript");
+          return;
+        }
+        this.$set(this.flowConditionForm, "conditionType", "expression");
+      }
+    },
+    updateFlowType(flowType) {
+      // 正常条件类
+      if (flowType === "condition") {
+        this.flowConditionRef = window.bpmnInstances.moddle.create("bpmn:FormalExpression");
+        window.bpmnInstances.modeling.updateProperties(this.bpmnElement, {
+          conditionExpression: this.flowConditionRef
+        });
+        return;
+      }
+      // 默认路径
+      if (flowType === "default") {
+        window.bpmnInstances.modeling.updateProperties(this.bpmnElement, {
+          conditionExpression: null
+        });
+        window.bpmnInstances.modeling.updateProperties(this.bpmnElementSource, {
+          default: this.bpmnElement
+        });
+        return;
+      }
+      // 正常路径，如果来源节点的默认路径是当前连线时，清除父元素的默认路径配置
+      if (this.bpmnElementSourceRef.default && this.bpmnElementSourceRef.default.id === this.bpmnElement.id) {
+        window.bpmnInstances.modeling.updateProperties(this.bpmnElementSource, {
+          default: null
+        });
+      }
+      window.bpmnInstances.modeling.updateProperties(this.bpmnElement, {
+        conditionExpression: null
+      });
+    },
+    updateFlowCondition() {
+      let { conditionType, scriptType, body, resource, language } = this.flowConditionForm;
+      let condition;
+      if (conditionType === "expression") {
+        condition = window.bpmnInstances.moddle.create("bpmn:FormalExpression", { body });
+      } else {
+        if (scriptType === "inlineScript") {
+          condition = window.bpmnInstances.moddle.create("bpmn:FormalExpression", { body, language });
+          this.$set(this.flowConditionForm, "resource", "");
+        } else {
+          this.$set(this.flowConditionForm, "body", "");
+          condition = window.bpmnInstances.moddle.create("bpmn:FormalExpression", { resource, language });
+        }
+      }
+      window.bpmnInstances.modeling.updateProperties(this.bpmnElement, { conditionExpression: condition });
+    }
+  },
+  beforeDestroy() {
+    this.bpmnElement = null;
+    this.bpmnElementSource = null;
+    this.bpmnElementSourceRef = null;
+  }
+};
+</script>