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