import Vue from 'vue';
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import Loading from './loading.vue';
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import { addClass, removeClass, getStyle } from 'element-ui/src/utils/dom';
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import { PopupManager } from 'element-ui/src/utils/popup';
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import afterLeave from 'element-ui/src/utils/after-leave';
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const Mask = Vue.extend(Loading);
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const loadingDirective = {};
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loadingDirective.install = Vue => {
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if (Vue.prototype.$isServer) return;
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const toggleLoading = (el, binding) => {
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if (binding.value) {
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Vue.nextTick(() => {
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if (binding.modifiers.fullscreen) {
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el.originalPosition = getStyle(document.body, 'position');
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el.originalOverflow = getStyle(document.body, 'overflow');
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el.maskStyle.zIndex = PopupManager.nextZIndex();
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addClass(el.mask, 'is-fullscreen');
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insertDom(document.body, el, binding);
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} else {
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removeClass(el.mask, 'is-fullscreen');
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if (binding.modifiers.body) {
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el.originalPosition = getStyle(document.body, 'position');
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['top', 'left'].forEach(property => {
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const scroll = property === 'top' ? 'scrollTop' : 'scrollLeft';
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el.maskStyle[property] = el.getBoundingClientRect()[property] +
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document.body[scroll] +
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document.documentElement[scroll] -
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parseInt(getStyle(document.body, `margin-${ property }`), 10) +
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'px';
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});
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['height', 'width'].forEach(property => {
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el.maskStyle[property] = el.getBoundingClientRect()[property] + 'px';
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});
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insertDom(document.body, el, binding);
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} else {
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el.originalPosition = getStyle(el, 'position');
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insertDom(el, el, binding);
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}
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}
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});
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} else {
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afterLeave(el.instance, _ => {
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if (!el.instance.hiding) return;
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el.domVisible = false;
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const target = binding.modifiers.fullscreen || binding.modifiers.body
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? document.body
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: el;
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removeClass(target, 'el-loading-parent--relative');
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removeClass(target, 'el-loading-parent--hidden');
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el.instance.hiding = false;
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}, 300, true);
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el.instance.visible = false;
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el.instance.hiding = true;
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}
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};
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const insertDom = (parent, el, binding) => {
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if (!el.domVisible && getStyle(el, 'display') !== 'none' && getStyle(el, 'visibility') !== 'hidden') {
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Object.keys(el.maskStyle).forEach(property => {
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el.mask.style[property] = el.maskStyle[property];
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});
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if (el.originalPosition !== 'absolute' && el.originalPosition !== 'fixed' && el.originalPosition !== 'sticky') {
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addClass(parent, 'el-loading-parent--relative');
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}
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if (binding.modifiers.fullscreen && binding.modifiers.lock) {
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addClass(parent, 'el-loading-parent--hidden');
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}
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el.domVisible = true;
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parent.appendChild(el.mask);
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Vue.nextTick(() => {
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if (el.instance.hiding) {
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el.instance.$emit('after-leave');
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} else {
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el.instance.visible = true;
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}
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});
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el.domInserted = true;
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} else if (el.domVisible && el.instance.hiding === true) {
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el.instance.visible = true;
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el.instance.hiding = false;
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}
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};
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Vue.directive('loading', {
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bind: function(el, binding, vnode) {
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const textExr = el.getAttribute('element-loading-text');
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const spinnerExr = el.getAttribute('element-loading-spinner');
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const backgroundExr = el.getAttribute('element-loading-background');
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const customClassExr = el.getAttribute('element-loading-custom-class');
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const vm = vnode.context;
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const mask = new Mask({
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el: document.createElement('div'),
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data: {
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text: vm && vm[textExr] || textExr,
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spinner: vm && vm[spinnerExr] || spinnerExr,
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background: vm && vm[backgroundExr] || backgroundExr,
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customClass: vm && vm[customClassExr] || customClassExr,
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fullscreen: !!binding.modifiers.fullscreen
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}
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});
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el.instance = mask;
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el.mask = mask.$el;
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el.maskStyle = {};
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binding.value && toggleLoading(el, binding);
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},
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update: function(el, binding) {
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el.instance.setText(el.getAttribute('element-loading-text'));
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if (binding.oldValue !== binding.value) {
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toggleLoading(el, binding);
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}
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},
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unbind: function(el, binding) {
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if (el.domInserted) {
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el.mask &&
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el.mask.parentNode &&
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el.mask.parentNode.removeChild(el.mask);
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toggleLoading(el, { value: false, modifiers: binding.modifiers });
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}
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el.instance && el.instance.$destroy();
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}
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});
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};
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export default loadingDirective;
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