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import React, { useCallback, useRef } from 'react'
import { Element, Text as SlateText, DecoratedRange } from 'slate'
import { ReactEditor, useSlateStatic } from '..'
import { isTextDecorationsEqual } from 'slate-dom'
import {
EDITOR_TO_KEY_TO_ELEMENT,
ELEMENT_TO_NODE,
NODE_TO_ELEMENT,
} from 'slate-dom'
import {
RenderLeafProps,
RenderPlaceholderProps,
RenderTextProps,
} from './editable'
import Leaf from './leaf'
import { useDecorations } from '../hooks/use-decorations'
const defaultRenderText = (props: RenderTextProps) => <DefaultText {...props} />
/**
* Text.
*/
const Text = (props: {
decorations: DecoratedRange[]
isLast: boolean
parent: Element
renderPlaceholder: (props: RenderPlaceholderProps) => JSX.Element
renderLeaf?: (props: RenderLeafProps) => JSX.Element
renderText?: (props: RenderTextProps) => JSX.Element
text: SlateText
}) => {
const {
decorations: parentDecorations,
isLast,
parent,
renderPlaceholder,
renderLeaf,
renderText = defaultRenderText,
text,
} = props
const editor = useSlateStatic()
const ref = useRef<HTMLSpanElement | null>(null)
const decorations = useDecorations(text, parentDecorations)
const decoratedLeaves = SlateText.decorations(text, decorations)
const key = ReactEditor.findKey(editor, text)
const children = []
for (let i = 0; i < decoratedLeaves.length; i++) {
const { leaf, position } = decoratedLeaves[i]
children.push(
<Leaf
isLast={isLast && i === decoratedLeaves.length - 1}
key={`${key.id}-${i}`}
renderPlaceholder={renderPlaceholder}
leaf={leaf}
leafPosition={position}
text={text}
parent={parent}
renderLeaf={renderLeaf}
/>
)
}
// Update element-related weak maps with the DOM element ref.
const callbackRef = useCallback(
(span: HTMLSpanElement | null) => {
const KEY_TO_ELEMENT = EDITOR_TO_KEY_TO_ELEMENT.get(editor)
if (span) {
KEY_TO_ELEMENT?.set(key, span)
NODE_TO_ELEMENT.set(text, span)
ELEMENT_TO_NODE.set(span, text)
} else {
KEY_TO_ELEMENT?.delete(key)
NODE_TO_ELEMENT.delete(text)
if (ref.current) {
ELEMENT_TO_NODE.delete(ref.current)
}
}
ref.current = span
},
[ref, editor, key, text]
)
const attributes: {
'data-slate-node': 'text'
ref: any
} = {
'data-slate-node': 'text',
ref: callbackRef,
}
return renderText({
text,
children,
attributes,
})
}
const MemoizedText = React.memo(Text, (prev, next) => {
return (
next.parent === prev.parent &&
next.isLast === prev.isLast &&
next.renderText === prev.renderText &&
next.renderLeaf === prev.renderLeaf &&
next.renderPlaceholder === prev.renderPlaceholder &&
next.text === prev.text &&
isTextDecorationsEqual(next.decorations, prev.decorations)
)
})
export const DefaultText = (props: RenderTextProps) => {
const { attributes, children } = props
return <span {...attributes}>{children}</span>
}
export default MemoizedText
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