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Focusing after click on margin in Slate.js editor
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import React, { useMemo, useState } from "react"; | |
import { createEditor, Transforms, Editor } from "slate"; | |
import { Slate, Editable, withReact, ReactEditor } from "slate-react"; | |
import { Box } from "@chakra-ui/react"; | |
const App = () => { | |
const editor = useMemo(() => withReact(createEditor()), []); | |
const [value, setValue] = useState([ | |
{ | |
type: "paragraph", | |
children: [{ text: "A line of text in a paragraph." }], | |
}, | |
{ | |
type: "paragraph", | |
children: [{ text: "A line of text in a paragraph." }], | |
}, | |
{ | |
type: "paragraph", | |
children: [{ text: "A line of text in a paragraph." }], | |
}, | |
{ | |
type: "paragraph", | |
children: [{ text: "A line of text in a paragraph." }], | |
}, | |
]); | |
// https://stackoverflow.com/a/31877959/1024501 | |
function closestIndex(list, x) { | |
var min, chosen = 0; | |
for (var i in list) { | |
min = Math.abs(list[chosen] - x); | |
if (Math.abs(list[i] - x) < min) { | |
chosen = i; | |
} | |
} | |
return chosen; | |
} | |
return ( | |
<Box margin="5px" padding="25px" w="500px" h="1000px" backgroundColor="tomato" cursor="text" onClick={ | |
e => { | |
e.preventDefault(); | |
if (!ReactEditor.isFocused(editor)) { | |
const [x, y] = [e.pageX, e.pageY]; | |
let rects = []; | |
for (const child of editor.children) { | |
const el = ReactEditor.toDOMNode(editor, child); | |
const rect = el.getBoundingClientRect(); | |
rects.push(rect); | |
} | |
let index = closestIndex(rects.map(rect => rect.top + rect.height/2), y); | |
let xDiff = Math.max(0, x - rects[index].left); | |
let domEditor = ReactEditor.toDOMNode(editor, editor) | |
let domEditorRect = domEditor.getBoundingClientRect(); | |
let caretPositionX = Math.min(rects[index].left + xDiff + 1, domEditorRect.left + domEditorRect.width); | |
let caretPositionY = rects[index].top + rects[index].height/2; | |
let domRange; | |
let offset; | |
if (document.caretPositionFromPoint) { | |
domRange = document.caretPositionFromPoint(caretPositionX, caretPositionY); | |
offset = domRange.offset; | |
} else if (document.caretRangeFromPoint) { | |
domRange = document.caretRangeFromPoint(caretPositionX, caretPositionY); | |
offset = domRange.startOffset; | |
} | |
const range = ReactEditor.toSlateRange(editor, domRange); | |
ReactEditor.focus(editor); | |
Transforms.select(editor, range); | |
} | |
}> | |
<Slate editor={editor} value={value} onChange={value => setValue(value)}> | |
<Editable /> | |
</Slate> | |
</Box> | |
) | |
}; |
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