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Copyright (C) 2017 Red Hat, Inc.
Licensed 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 React, {
FunctionComponent,
MutableRefObject,
createContext,
useCallback,
useContext,
useEffect,
useRef,
} from 'react';
import { useBoundingCanvasRect } from './useBoundingCanvasRect';
export interface NodeRect extends DOMRect {
clipped?: boolean;
}
export interface NodeRefProps {
ref: MutableRefObject<HTMLElement | SVGElement | null>;
parentId?: string;
boundaryId?: string;
overrideWidth?: string;
overrideHeight?: string;
}
export interface NodeRefPropsWithOptionalId extends NodeRefProps {
id: string | undefined | Array<string | undefined>;
}
export interface NodeRefPropsWithId extends NodeRefProps {
id: string;
}
export interface NodeRefPropsWithKey extends NodeRefProps {
key: string;
}
export interface NodeRefMap {
[id: string]: NodeRefPropsWithKey;
}
export interface INodeRefContext {
nodes: MutableRefObject<NodeRefMap>;
setRef: (props: NodeRefPropsWithId) => string;
unsetRef: (
id: string | undefined | Array<string | undefined>,
key: string,
) => void;
}
export const NodeRefContext = createContext<INodeRefContext | null>(null);
export const NodeRefProvider: FunctionComponent = ({ children }) => {
const nodes = useRef<NodeRefMap>({});
const setRef = ({ id, ...props }: NodeRefPropsWithId) => {
const key = `${id}-${Date.now()}`;
const ids = Array.isArray(id) ? id : [id];
for (let index = 0; index < ids.length; index++) {
const curId = ids[index];
if (curId) {
nodes.current[ids[index]] = {
...props,
key,
};
}
}
return key;
};
const unsetRef = (
id: string | undefined | Array<string | undefined>,
key: string,
) => {
const ids = Array.isArray(id) ? id : [id];
for (let index = 0; index < ids.length; index++) {
const curId = ids[index];
if (curId && nodes.current[curId]?.key === key) {
delete nodes.current[curId];
}
}
};
return (
<NodeRefContext.Provider
value={{
nodes,
setRef,
unsetRef,
}}
>
{children}
</NodeRefContext.Provider>
);
};
export function useNodeRef(props: NodeRefPropsWithOptionalId) {
const context = useContext(NodeRefContext);
useEffect(() => {
if (context && props.id) {
const { setRef, unsetRef } = context;
const key = setRef(props as NodeRefPropsWithId);
return () => unsetRef(props.id!, key);
}
return;
}, [context, props]);
}
export function useNodeRect() {
const context = useContext(NodeRefContext);
const { getBoundingCanvasRect } = useBoundingCanvasRect();
const getRect = useCallback(
(id: string): NodeRect | null => {
Iif (!context) {
return null;
}
const { nodes } = context;
const node = nodes.current[id];
const element = node ? node.ref.current : undefined;
if (element) {
let dimensions = getBoundingCanvasRect(element);
if (dimensions.height === 0 && node.parentId) {
return getRect(node.parentId);
}
let boundaryRect;
if (node.boundaryId && (boundaryRect = getRect(node.boundaryId))) {
const overrideWidthRect = node.overrideWidth
? getRect(node.overrideWidth)
: undefined;
const overrideHeightRect = node.overrideHeight
? getRect(node.overrideHeight)
: undefined;
const width = overrideWidthRect?.width || dimensions.width;
const height = overrideHeightRect?.height || dimensions.height;
const x = Math.min(
Math.max(
overrideWidthRect?.left || dimensions.left,
boundaryRect.left,
),
boundaryRect.width + boundaryRect.left - dimensions.width,
);
const isXClipped = x !== (overrideWidthRect?.x || dimensions.x);
const y = Math.min(
Math.max(
overrideHeightRect?.top || dimensions.top + dimensions.height / 2,
boundaryRect.top,
),
boundaryRect.height + boundaryRect.top,
);
const isYClipped =
y === boundaryRect.top ||
y === boundaryRect.height + boundaryRect.top;
return {
width,
height,
x,
y,
left: x,
top: y,
right: x + width,
bottom: y + height,
toJSON: () => '',
clipped: isXClipped || isYClipped,
};
}
return dimensions;
}
return null;
},
[context, getBoundingCanvasRect],
);
return getRect;
}
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