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[EN-6218] feat(textarea): add textarea line limit
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src/components/modals/Modal/ModalGeneric/PostOpportunityModal/PostOpportunityModal.tsx
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,4 +1,3 @@ | ||
| import _ from 'lodash'; | ||
| import moment from 'moment'; | ||
| import React, { | ||
| /* memo, */ useCallback, | ||
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1 change: 0 additions & 1 deletion
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src/components/utils/BackgroundImage/BackgroundImage.styles.tsx
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| import { useCallback, useEffect, useRef, useState } from 'react'; | ||
| import UIkit from 'uikit'; | ||
| import { usePrevious } from 'src/hooks/utils'; | ||
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| export function useLineLimit( | ||
| value: string, | ||
| name: string, | ||
| onChange: (arg: { target: { value: string; name: string } }) => void, | ||
| maxLines?: number | ||
| ) { | ||
| const prevValue: string = usePrevious(value); | ||
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| const ref = useRef<HTMLTextAreaElement>(); | ||
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| const [numberOfLines, setNumberOfLines] = useState(0); | ||
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| const calculateContentHeight = useCallback((ta, scanAmount) => { | ||
| const origHeight = ta.style.height; | ||
| let height = ta.offsetHeight; | ||
| const { scrollHeight } = ta; | ||
| const { overflow } = ta.style; | ||
| /// only bother if the ta is bigger than content | ||
| if (height >= scrollHeight) { | ||
| /// check that our browser supports changing dimension | ||
| /// calculations mid-way through a function call... | ||
| ta.style.height = `${height + scanAmount}px`; | ||
| /// because the scrollbar can cause calculation problems | ||
| ta.style.overflow = 'hidden'; | ||
| /// by checking that scrollHeight has updated | ||
| if (scrollHeight < ta.scrollHeight) { | ||
| /// now try and scan the ta's height downwards | ||
| /// until scrollHeight becomes larger than height | ||
| while (ta.offsetHeight >= ta.scrollHeight) { | ||
| ta.style.height = `${(height -= scanAmount)}px`; | ||
| } | ||
| /// be more specific to get the exact height | ||
| while (ta.offsetHeight < ta.scrollHeight) { | ||
| ta.style.height = `${(height += 1)}px`; | ||
| } | ||
| /// reset the ta back to it's original height | ||
| ta.style.height = origHeight; | ||
| /// put the overflow back | ||
| ta.style.overflow = overflow; | ||
| return height; | ||
| } | ||
| } else { | ||
| return scrollHeight; | ||
| } | ||
| }, []); | ||
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| useEffect(() => { | ||
| if (maxLines && ref && ref.current && value !== prevValue) { | ||
| const ta = ref.current; | ||
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| const style = window.getComputedStyle | ||
| ? window.getComputedStyle(ta) | ||
| : ta.style; | ||
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| const taLineHeight = parseInt(style.lineHeight, 10); | ||
| const taPaddingBottom = parseInt(style.paddingBottom, 10); | ||
| const taPaddingTop = parseInt(style.paddingTop, 10); | ||
| const taHeight = calculateContentHeight(ta, taLineHeight); | ||
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| const nbOfLines = Math.ceil( | ||
| (taHeight - taPaddingBottom - taPaddingTop) / taLineHeight | ||
| ); | ||
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| if (nbOfLines > maxLines) { | ||
| if (!prevValue || value.length - prevValue.length > 1) { | ||
| UIkit.notification( | ||
| `Le texte que vous avez essayé de coller dépasse la limite des ${maxLines} lignes.`, | ||
| 'danger' | ||
| ); | ||
| } | ||
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| onChange({ | ||
| target: { | ||
| value: prevValue || '', | ||
| name, | ||
| }, | ||
| }); | ||
| } else { | ||
| setNumberOfLines(!value ? 0 : nbOfLines); | ||
| } | ||
| } | ||
| }, [calculateContentHeight, maxLines, name, onChange, prevValue, value]); | ||
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| const remainingLines = | ||
| maxLines - numberOfLines < 0 ? 0 : maxLines - numberOfLines; | ||
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| return { remainingLines, textAreaRef: ref }; | ||
| } |