<script> 
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import draggable from 'vuedraggable' 
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import render from '@/utils/generator/render' 
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const components = { 
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  itemBtns(h, element, index, parent) { 
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    const { copyItem, deleteItem } = this.$listeners 
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    return [ 
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      <span class="drawing-item-copy" title="复制" onClick={event => { 
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        copyItem(element, parent); event.stopPropagation() 
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      }}> 
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        <i class="el-icon-copy-document" /> 
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      </span>, 
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      <span class="drawing-item-delete" title="删除" onClick={event => { 
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        deleteItem(index, parent); event.stopPropagation() 
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      }}> 
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        <i class="el-icon-delete" /> 
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      </span> 
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    ] 
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  } 
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} 
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const layouts = { 
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  colFormItem(h, element, index, parent) { 
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    const { activeItem } = this.$listeners 
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    let className = this.activeId === element.formId ? 'drawing-item active-from-item' : 'drawing-item' 
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    if (this.formConf.unFocusedComponentBorder) className += ' unfocus-bordered' 
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    return ( 
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      <el-col span={element.span} class={className} 
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        nativeOnClick={event => { activeItem(element); event.stopPropagation() }}> 
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        <el-form-item label-width={element.labelWidth ? `${element.labelWidth}px` : null} 
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          label={element.label} required={element.required}> 
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          <render key={element.renderKey} conf={element} onInput={ event => { 
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            this.$set(element, 'defaultValue', event) 
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          }} /> 
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        </el-form-item> 
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        {components.itemBtns.apply(this, arguments)} 
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      </el-col> 
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    ) 
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  }, 
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  rowFormItem(h, element, index, parent) { 
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    const { activeItem } = this.$listeners 
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    const className = this.activeId === element.formId ? 'drawing-row-item active-from-item' : 'drawing-row-item' 
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    let child = renderChildren.apply(this, arguments) 
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    if (element.type === 'flex') { 
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      child = <el-row type={element.type} justify={element.justify} align={element.align}> 
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              {child} 
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            </el-row> 
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    } 
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    return ( 
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      <el-col span={element.span}> 
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        <el-row gutter={element.gutter} class={className} 
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          nativeOnClick={event => { activeItem(element); event.stopPropagation() }}> 
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          <span class="component-name">{element.componentName}</span> 
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          <draggable list={element.children} animation={340} group="componentsGroup" class="drag-wrapper"> 
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            {child} 
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          </draggable> 
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          {components.itemBtns.apply(this, arguments)} 
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        </el-row> 
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      </el-col> 
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    ) 
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  } 
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} 
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function renderChildren(h, element, index, parent) { 
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  if (!Array.isArray(element.children)) return null 
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  return element.children.map((el, i) => { 
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    const layout = layouts[el.layout] 
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    if (layout) { 
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      return layout.call(this, h, el, i, element.children) 
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    } 
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    return layoutIsNotFound() 
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  }) 
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} 
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function layoutIsNotFound() { 
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  throw new Error(`没有与${this.element.layout}匹配的layout`) 
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} 
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export default { 
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  components: { 
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    render, 
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    draggable 
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  }, 
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  props: [ 
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    'element', 
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    'index', 
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    'drawingList', 
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    'activeId', 
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    'formConf' 
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  ], 
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  render(h) { 
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    const layout = layouts[this.element.layout] 
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    if (layout) { 
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      return layout.call(this, h, this.element, this.index, this.drawingList) 
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    } 
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    return layoutIsNotFound() 
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  } 
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} 
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</script> 
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