Image.jsx 4.65 KB
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import { NodeViewWrapper, ReactNodeViewRenderer } from "@tiptap/react";
import React, { useCallback, useEffect, useLayoutEffect, useRef, useState, Fragment } from "react";
import TipTapImage from "@tiptap/extension-image";

const useEvent = (handler) => {
    const handlerRef = useRef(null);

    useLayoutEffect(() => {
        handlerRef.current = handler;
    }, [handler]);

    return useCallback((...args) => {
        if (handlerRef.current === null) {
            throw new Error('Handler is not assigned');
        }
        return handlerRef.current(...args);
    }, []);
};

const MIN_WIDTH = 60;
const BORDER_COLOR = '#0096fd';

const ResizableImageTemplate = ({ node, updateAttributes }) => {
    const containerRef = useRef(null);
    const imgRef = useRef(null);
    const [editing, setEditing] = useState(false);
    const [resizingStyle, setResizingStyle] = useState(undefined);

    useEffect(() => {
        const handleClickOutside = (event) => {
            if (containerRef.current && !containerRef.current.contains(event.target)) {
                setEditing(false);
            }
        };
        document.addEventListener('click', handleClickOutside);
        return () => {
            document.removeEventListener('click', handleClickOutside);
        };
    }, [editing]);

    const handleMouseDown = useEvent((event) => {
        if (!imgRef.current) return;
        event.preventDefault();
        const direction = event.currentTarget.dataset.direction || "--";
        const initialXPosition = event.clientX;
        const currentWidth = imgRef.current.width;
        let newWidth = currentWidth;
        const transform = direction[1] === "w" ? -1 : 1;

        const removeListeners = () => {
            window.removeEventListener("mousemove", mouseMoveHandler);
            window.removeEventListener("mouseup", removeListeners);
            updateAttributes({ width: newWidth });
            setResizingStyle(undefined);
        };

        const mouseMoveHandler = (event) => {
            newWidth = Math.max(currentWidth + (transform * (event.clientX - initialXPosition)), MIN_WIDTH);
            setResizingStyle({ width: newWidth });
            if (!event.buttons) removeListeners();
        };

        window.addEventListener("mousemove", mouseMoveHandler);
        window.addEventListener("mouseup", removeListeners);
    });

    const dragCornerButton = (direction) => (
        <div
            role="button"
            tabIndex={0}
            onMouseDown={handleMouseDown}
            data-direction={direction}
            style={{
                position: 'absolute',
                height: '10px',
                width: '10px',
                backgroundColor: BORDER_COLOR,
                ...(direction[0] === 'n' ? { top: 0 } : { bottom: 0 }),
                ...(direction[1] === 'w' ? { left: 0 } : { right: 0 }),
                cursor: `${direction}-resize`,
            }}
        >
        </div>
    );

    return (
        <NodeViewWrapper
            ref={containerRef}
            as="div" draggable data-drag-handle
            onClick={() => setEditing(true)}
            onBlur={() => setEditing(false)}
            style={{
                overflow: 'hidden',
                position: 'relative',
                display: 'inline-block',
                lineHeight: '0px',
            }}
        >
            <img
                {...node.attrs} ref={imgRef}
                style={{
                    ...resizingStyle,
                    cursor: 'default',
                }}
            />
            {editing && (
                <>
                    {[
                        {left: 0, top: 0, height: '100%', width: '1px'}, {right: 0, top: 0, height: '100%', width: '1px'},
                        {top: 0, left: 0, width: '100%', height: '1px'}, {bottom: 0, left: 0, width: '100%', height: '1px'}
                    ].map((style, i) => (
                        <div key={i} style={{ position: 'absolute', backgroundColor: BORDER_COLOR, ...style }}></div>
                    ))}
                    {dragCornerButton("nw")}
                    {dragCornerButton("ne")}
                    {dragCornerButton("sw")}
                    {dragCornerButton("se")}
                </>
            )}
        </NodeViewWrapper>
    );
};

const ResizableImageExtension = TipTapImage.extend({
    addAttributes() {
        return {
            ...this.parent?.(),
            width: { renderHTML: ({ width }) => ({ width }) },
            height: { renderHTML: ({ height }) => ({ height }) },
        };
    },
    addNodeView() {
        return ReactNodeViewRenderer(ResizableImageTemplate);
    },
}).configure({ inline: true });

export default ResizableImageExtension;