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fixes #2 Signed-off-by: Colton Wolkins (Laptop) <[email protected]>
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Original file line number | Diff line number | Diff line change |
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import React, { useState, useCallback, useMemo } from 'react' | ||
import { Node as SNode, Transforms, Text, createEditor, Descendant } from 'slate' | ||
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import { Slate, Editable, withReact } from 'slate-react' | ||
import { withHistory } from 'slate-history' | ||
import { css } from '@emotion/css' | ||
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import Prism from 'prismjs' | ||
import 'prismjs/components/prism-markdown' | ||
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const Editor = ({ onSubmit }) => { | ||
const [value, setValue] = useState(initialValue); | ||
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const renderLeaf = useCallback(props => <Leaf {...props} />, []) | ||
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const editor = useMemo(() => withHistory(withReact(createEditor())), []); | ||
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const decorate = useCallback(([node, path]) => { | ||
const ranges = []; | ||
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if(!Text.isText(node)) { | ||
return ranges; | ||
} | ||
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const getLength = token => { | ||
if(typeof token === 'string') | ||
return token.length; | ||
else if(typeof token.content == 'string') | ||
return token.content.length; | ||
else | ||
return token.content.reduce((l, t) => l + getLength(t), 0); | ||
} | ||
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const tokens = Prism.tokenize(node.text, Prism.languages.markdown); | ||
let start = 0; | ||
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for(const token of tokens) { | ||
const length = getLength(token); | ||
const end = start + length; | ||
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if(typeof token !== 'string') { | ||
ranges.push({ | ||
[token.type]: true, | ||
anchor: {path, offset: start}, | ||
focus: {path, offset: end}, | ||
}); | ||
} | ||
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start = end; | ||
} | ||
return ranges; | ||
}, []); | ||
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return ( | ||
<div className="grow"> | ||
<Slate | ||
editor={editor} | ||
initialValue={value} | ||
onChange={(value) => { | ||
setValue(value); | ||
}} | ||
> | ||
<Editable | ||
decorate={decorate} | ||
renderLeaf={renderLeaf} | ||
placeholder="Message for friends" | ||
className="py-2 px-4 bg-slate-200 dark:bg-slate-600" | ||
onKeyDown={event => { | ||
if(!event.ctrlKey) { | ||
return; | ||
} | ||
if(event.key === 'Enter' && !event.shiftKey) { | ||
event.preventDefault(); | ||
onSubmit(value.map(n => SNode.string(n)).join('\n')); | ||
const newValue = [{type: 'paragraph', children: [{text: ""}]}]; | ||
//const point = { path: [0, 0], offset: 0 } | ||
//editor.selection = { anchor: point, focus: point }; | ||
//editor.history = { redos: [], undos: [] }; | ||
//editor.children = newValue; | ||
Transforms.select(editor, { offset: 0, path: [0, 0] }); | ||
editor.children.map(item => Transforms.delete(editor, { at: [0] })); | ||
editor.children = newValue; | ||
editor.onChange(); | ||
//setValue(newValue); | ||
} | ||
}} | ||
/> | ||
</Slate> | ||
</div> | ||
); | ||
}; | ||
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const Leaf = ({ attributes, children, leaf }) => { | ||
return ( | ||
<span | ||
{...attributes} | ||
className={css` | ||
font-weight: ${leaf.bold && 'bold'}; | ||
font-style: ${leaf.italic && 'italic'}; | ||
text-decoration: ${leaf.underlined && 'underline'}; | ||
${leaf.title && | ||
css` | ||
display: inline-block; | ||
font-weight: bold; | ||
font-size: 20px; | ||
margin: 20px 0 10px 0; | ||
`} | ||
${leaf.list && | ||
css` | ||
padding-left: 10px; | ||
font-size: 20px; | ||
line-height: 10px; | ||
`} | ||
${leaf.hr && | ||
css` | ||
display: block; | ||
text-align: center; | ||
border-bottom: 2px solid #ddd; | ||
`} | ||
${leaf.blockquote && | ||
css` | ||
display: inline-block; | ||
border-left: 2px solid #ddd; | ||
padding-left: 10px; | ||
color: #aaa; | ||
font-style: italic; | ||
`} | ||
${leaf.code && | ||
css` | ||
font-family: monospace; | ||
background-color: #eee; | ||
padding: 3px; | ||
`} | ||
`} | ||
> | ||
{children} | ||
</span> | ||
); | ||
}; | ||
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const initialValue: Descendant[] = [ | ||
{ | ||
type: 'paragraph', | ||
children: [ | ||
{ | ||
text: 'Slate is flexible enough to add **decorations** that can format text based on its content. For example, this editor has **Markdown** preview decorations on it, to make it _dead_ simple to make an editor with built-in Markdown previewing.', | ||
}, | ||
], | ||
}, | ||
{ | ||
type: 'paragraph', | ||
children: [{ text: '## Try it out!' }], | ||
}, | ||
{ | ||
type: 'paragraph', | ||
children: [{ text: 'Try it out for yourself!' }], | ||
}, | ||
] | ||
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export default Editor; |
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