| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| import { |
| getParentScroller |
| } from '../utils' |
| |
| export default { |
| destroyed () { |
| if (!this._stickyAdded) { return } |
| const scroller = getParentScroller(this) |
| if (!scroller) { return } |
| delete scroller._stickyChildren[this._uid] |
| }, |
| |
| methods: { |
| _addSticky () { |
| const el = this.$el |
| if (!el || el.nodeType === 1) { |
| if (process.env.NODE_ENV === 'development') { |
| console.error(`[vue-render] $el doesn't exist to add sticky.`) |
| } |
| return |
| } |
| el.classList.add('sticky') |
| if (!this._placeholder) { |
| this._placeholder = el.cloneNode(true) |
| } |
| this._placeholder.style.display = 'block' |
| this._placeholder.style.width = this.$el.offsetWidth + 'px' |
| this._placeholder.style.height = this.$el.offsetHeight + 'px' |
| el.parentNode.insertBefore(this._placeholder, this.$el) |
| }, |
| |
| _removeSticky () { |
| const el = this.$el |
| if (!el || el.nodeType === 1) { |
| if (process.env.NODE_ENV === 'development') { |
| console.error(`[vue-render] $el doesn't exist to remove sticky.`) |
| } |
| return |
| } |
| el.classList.remove('sticky') |
| if (this._placeholder) { |
| this._placeholder.parentNode.removeChild(this._placeholder) |
| } |
| this._placeholder = null |
| } |
| } |
| } |