layui/.svn/pristine/2c/2c97ee7b9965ca2317b5b6ac8d4fde3094f9646d.svn-base
2022-12-09 16:41:41 +08:00

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import { DropdownPlacement } from "./interface";
import { Component, onMounted, onUpdated, ref, VNode, VNodeTypes } from "vue";
export interface SlotChildren {
value?: VNode[];
}
// Quoted from arco-vue
// https://github.com/arco-design/arco-design-vue/blob/main/packages/web-vue/components/_utils/vue-utils.ts
export enum ShapeFlags {
ELEMENT = 1,
FUNCTIONAL_COMPONENT = 1 << 1,
STATEFUL_COMPONENT = 1 << 2,
COMPONENT = ShapeFlags.STATEFUL_COMPONENT | ShapeFlags.FUNCTIONAL_COMPONENT,
TEXT_CHILDREN = 1 << 3,
ARRAY_CHILDREN = 1 << 4,
SLOTS_CHILDREN = 1 << 5,
TELEPORT = 1 << 6,
SUSPENSE = 1 << 7,
COMPONENT_SHOULD_KEEP_ALIVE = 1 << 8,
COMPONENT_KEPT_ALIVE = 1 << 9,
}
export const isScrollElement = (element: HTMLElement) => {
return (
element.scrollHeight > element.offsetHeight ||
element.scrollWidth > element.offsetWidth
);
};
export const getScrollElements = (container: HTMLElement | undefined) => {
const scrollElements: HTMLElement[] = [];
let element: HTMLElement | undefined = container;
while (element && element !== document.documentElement) {
if (isScrollElement(element)) {
scrollElements.push(element);
}
element = element.parentElement ?? undefined;
}
return scrollElements;
};
export const isElement = (vn: VNode) => {
return Boolean(vn && vn.shapeFlag & ShapeFlags.ELEMENT);
};
export const isComponent = (
vn: VNode,
type?: VNodeTypes
): type is Component => {
return Boolean(vn && vn.shapeFlag & ShapeFlags.COMPONENT);
};
export const isArrayChildren = (
vn: VNode,
children: VNode["children"]
): children is VNode[] => {
return Boolean(vn && vn.shapeFlag & ShapeFlags.ARRAY_CHILDREN);
};
export const getChildrenArray = (vn: VNode): VNode[] | undefined => {
if (isArrayChildren(vn, vn.children)) {
return vn.children;
}
if (Array.isArray(vn)) {
return vn;
}
return undefined;
};
export const getFirstElementFromVNode = (
vn: VNode
): HTMLElement | undefined => {
if (isElement(vn)) {
return vn.el as HTMLElement;
}
if (isComponent(vn)) {
if ((vn.el as Node)?.nodeType === 1) {
return vn.el as HTMLElement;
}
if (vn.component?.subTree) {
const ele = getFirstElementFromVNode(vn.component.subTree);
if (ele) return ele;
}
} else {
const children = getChildrenArray(vn);
return getFirstElementFromChildren(children);
}
return undefined;
};
export const getFirstElementFromChildren = (
children: VNode[] | undefined
): HTMLElement | undefined => {
if (children && children.length > 0) {
for (const child of children) {
const element = getFirstElementFromVNode(child);
if (element) return element;
}
}
return undefined;
};
export const useFirstElement = () => {
const children: SlotChildren = {};
const firstElement = ref<HTMLElement>();
const getFirstElement = () => {
const element = getFirstElementFromChildren(children.value);
if (element !== firstElement.value) {
firstElement.value = element;
}
};
onMounted(() => getFirstElement());
onUpdated(() => getFirstElement());
return {
children,
firstElement,
};
};
export const transformPlacement = (
placement: DropdownPlacement
): DropdownPlacement => {
const shouldTransform = placement.includes("-");
const placementMap: any = {
top: "start",
left: "start",
bottom: "end",
right: "end",
};
if (shouldTransform) {
const separated = placement.split("-");
return `${separated[0]}-${
placementMap[separated[1]] || separated[1]
}` as DropdownPlacement;
}
return placement;
};