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input.ts
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input.ts
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import {
endTrackValue,
getUIValue,
setUIValue,
startTrackValue,
UISelectionRange,
} from '../../document'
import {dispatchUIEvent} from '../../event'
import {Config} from '../../setup'
import {
getInputRange,
getNextCursorPosition,
isElementType,
setSelection,
} from '../../utils'
import {buildTimeValue} from './buildTimeValue'
import {editableInputTypes} from './isEditable'
import {isValidDateOrTimeValue} from './isValidDateOrTimeValue'
import {getSpaceUntilMaxLength} from './maxLength'
type EditableInputOrTextarea =
| (HTMLInputElement & {type: editableInputTypes})
| HTMLTextAreaElement
type DateOrTimeInput = HTMLInputElement & {type: 'date' | 'time'}
function isDateOrTime(element: Element): element is DateOrTimeInput {
return (
isElementType(element, 'input') && ['date', 'time'].includes(element.type)
)
}
export function input(
config: Config,
element: Element,
data: string,
inputType: string = 'insertText',
) {
const inputRange = getInputRange(element)
/* istanbul ignore if */
if (!inputRange) {
return
}
// There is no `beforeinput` event on `date` and `time` input
if (!isDateOrTime(element)) {
const unprevented = dispatchUIEvent(config, element, 'beforeinput', {
inputType,
data,
})
if (!unprevented) {
return
}
}
if ('startContainer' in inputRange) {
editContenteditable(config, element, inputRange, data, inputType)
} else {
editInputElement(
config,
element as EditableInputOrTextarea,
inputRange,
data,
inputType,
)
}
}
function editContenteditable(
config: Config,
element: Element,
inputRange: Range,
data: string,
inputType: string,
) {
let del: boolean = false
if (!inputRange.collapsed) {
del = true
inputRange.deleteContents()
} else if (
['deleteContentBackward', 'deleteContentForward'].includes(inputType)
) {
const nextPosition = getNextCursorPosition(
inputRange.startContainer,
inputRange.startOffset,
inputType === 'deleteContentBackward' ? -1 : 1,
inputType,
)
if (nextPosition) {
del = true
const delRange = inputRange.cloneRange()
if (delRange.comparePoint(nextPosition.node, nextPosition.offset) < 0) {
delRange.setStart(nextPosition.node, nextPosition.offset)
} else {
delRange.setEnd(nextPosition.node, nextPosition.offset)
}
delRange.deleteContents()
}
}
if (data) {
if (inputRange.endContainer.nodeType === 3) {
const offset = inputRange.endOffset
;(inputRange.endContainer as Text).insertData(offset, data)
inputRange.setStart(inputRange.endContainer, offset + data.length)
inputRange.setEnd(inputRange.endContainer, offset + data.length)
} else {
const text = element.ownerDocument.createTextNode(data)
inputRange.insertNode(text)
inputRange.setStart(text, data.length)
inputRange.setEnd(text, data.length)
}
}
if (del || data) {
dispatchUIEvent(config, element, 'input', {inputType})
}
}
function editInputElement(
config: Config,
element: EditableInputOrTextarea,
inputRange: UISelectionRange,
data: string,
inputType: string,
) {
let dataToInsert = data
const spaceUntilMaxLength = getSpaceUntilMaxLength(element)
if (spaceUntilMaxLength !== undefined) {
if (spaceUntilMaxLength > 0) {
dataToInsert = data.substring(0, spaceUntilMaxLength)
} else {
return
}
}
const {newValue, newOffset, oldValue} = calculateNewValue(
dataToInsert,
element,
inputRange,
inputType,
)
if (
newValue === oldValue &&
newOffset === inputRange.startOffset &&
newOffset === inputRange.endOffset
) {
return
}
if (
isElementType(element, 'input', {type: 'number'}) &&
!isValidNumberInput(newValue)
) {
return
}
setUIValue(element, newValue)
setSelection({
focusNode: element,
anchorOffset: newOffset,
focusOffset: newOffset,
})
if (isDateOrTime(element)) {
if (isValidDateOrTimeValue(element, newValue)) {
commitInput(config, element, newOffset, {})
dispatchUIEvent(config, element, 'change')
}
} else {
commitInput(config, element, newOffset, {
data,
inputType,
})
}
}
function calculateNewValue(
inputData: string,
node: EditableInputOrTextarea,
{
startOffset,
endOffset,
}: {
startOffset: number
endOffset: number
},
inputType?: string,
) {
const value = getUIValue(node)
const prologEnd = Math.max(
0,
startOffset === endOffset && inputType === 'deleteContentBackward'
? startOffset - 1
: startOffset,
)
const prolog = value.substring(0, prologEnd)
const epilogStart = Math.min(
value.length,
startOffset === endOffset && inputType === 'deleteContentForward'
? startOffset + 1
: endOffset,
)
const epilog = value.substring(epilogStart, value.length)
let newValue = `${prolog}${inputData}${epilog}`
let newOffset = prologEnd + inputData.length
if (isElementType(node, 'input', {type: 'time'} as const)) {
const builtValue = buildTimeValue(newValue)
if (builtValue !== '' && isValidDateOrTimeValue(node, builtValue)) {
newValue = builtValue
newOffset = builtValue.length
}
}
return {
oldValue: value,
newValue,
newOffset,
}
}
function commitInput(
config: Config,
element: EditableInputOrTextarea,
newOffset: number,
inputInit: InputEventInit,
) {
// When the input event happens in the browser, React executes all event handlers
// and if they change state of a controlled value, nothing happens.
// But when we trigger the event handlers in test environment,
// the changes are rolled back by React before the state update is applied.
// Then the updated state is applied which results in a reset cursor.
// There is probably a better way to work around if we figure out
// why the batched update is executed differently in our test environment.
startTrackValue(element)
dispatchUIEvent(config, element, 'input', inputInit)
if (endTrackValue(element as HTMLInputElement)) {
setSelection({
focusNode: element,
anchorOffset: newOffset,
focusOffset: newOffset,
})
}
}
function isValidNumberInput(value: string) {
// the browser allows some invalid input but not others
// it allows up to two '-' at any place before any 'e' or one directly following 'e'
// it allows one '.' at any place before e
const valueParts = value.split('e', 2)
return !(
/[^\d.\-e]/.test(value) ||
Number(value.match(/-/g)?.length) > 2 ||
Number(value.match(/\./g)?.length) > 1 ||
(valueParts[1] && !/^-?\d*$/.test(valueParts[1]))
)
}