389 lines
11 KiB
Plaintext
389 lines
11 KiB
Plaintext
// @flow
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import type {
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Interpolation,
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SerializedStyles,
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RegisteredCache
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} from '@emotion/utils'
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import hashString from '@emotion/hash'
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import unitless from '@emotion/unitless'
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import memoize from '@emotion/memoize'
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const ILLEGAL_ESCAPE_SEQUENCE_ERROR = `You have illegal escape sequence in your template literal, most likely inside content's property value.
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Because you write your CSS inside a JavaScript string you actually have to do double escaping, so for example "content: '\\00d7';" should become "content: '\\\\00d7';".
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You can read more about this here:
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals#ES2018_revision_of_illegal_escape_sequences`
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const UNDEFINED_AS_OBJECT_KEY_ERROR =
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"You have passed in falsy value as style object's key (can happen when in example you pass unexported component as computed key)."
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let hyphenateRegex = /[A-Z]|^ms/g
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let animationRegex = /_EMO_([^_]+?)_([^]*?)_EMO_/g
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const isCustomProperty = (property: string) => property.charCodeAt(1) === 45
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const isProcessableValue = value => value != null && typeof value !== 'boolean'
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const processStyleName = /* #__PURE__ */ memoize((styleName: string) =>
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isCustomProperty(styleName)
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? styleName
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: styleName.replace(hyphenateRegex, '-$&').toLowerCase()
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)
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let processStyleValue = (
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key: string,
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value: string | number
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): string | number => {
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switch (key) {
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case 'animation':
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case 'animationName': {
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if (typeof value === 'string') {
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return value.replace(animationRegex, (match, p1, p2) => {
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cursor = {
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name: p1,
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styles: p2,
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next: cursor
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}
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return p1
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})
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}
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}
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}
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if (
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unitless[key] !== 1 &&
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!isCustomProperty(key) &&
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typeof value === 'number' &&
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value !== 0
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) {
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return value + 'px'
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}
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return value
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}
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if (process.env.NODE_ENV !== 'production') {
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let contentValuePattern =
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/(var|attr|counters?|url|element|(((repeating-)?(linear|radial))|conic)-gradient)\(|(no-)?(open|close)-quote/
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let contentValues = ['normal', 'none', 'initial', 'inherit', 'unset']
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let oldProcessStyleValue = processStyleValue
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let msPattern = /^-ms-/
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let hyphenPattern = /-(.)/g
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let hyphenatedCache = {}
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processStyleValue = (key: string, value: string) => {
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if (key === 'content') {
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if (
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typeof value !== 'string' ||
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(contentValues.indexOf(value) === -1 &&
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!contentValuePattern.test(value) &&
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(value.charAt(0) !== value.charAt(value.length - 1) ||
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(value.charAt(0) !== '"' && value.charAt(0) !== "'")))
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) {
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throw new Error(
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`You seem to be using a value for 'content' without quotes, try replacing it with \`content: '"${value}"'\``
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)
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}
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}
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const processed = oldProcessStyleValue(key, value)
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if (
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processed !== '' &&
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!isCustomProperty(key) &&
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key.indexOf('-') !== -1 &&
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hyphenatedCache[key] === undefined
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) {
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hyphenatedCache[key] = true
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console.error(
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`Using kebab-case for css properties in objects is not supported. Did you mean ${key
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.replace(msPattern, 'ms-')
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.replace(hyphenPattern, (str, char) => char.toUpperCase())}?`
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)
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}
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return processed
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}
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}
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const noComponentSelectorMessage =
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'Component selectors can only be used in conjunction with ' +
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'@emotion/babel-plugin, the swc Emotion plugin, or another Emotion-aware ' +
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'compiler transform.'
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function handleInterpolation(
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mergedProps: void | Object,
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registered: RegisteredCache | void,
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interpolation: Interpolation
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): string | number {
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if (interpolation == null) {
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return ''
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}
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if (interpolation.__emotion_styles !== undefined) {
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if (
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process.env.NODE_ENV !== 'production' &&
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interpolation.toString() === 'NO_COMPONENT_SELECTOR'
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) {
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throw new Error(noComponentSelectorMessage)
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}
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return interpolation
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}
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switch (typeof interpolation) {
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case 'boolean': {
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return ''
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}
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case 'object': {
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if (interpolation.anim === 1) {
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cursor = {
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name: interpolation.name,
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styles: interpolation.styles,
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next: cursor
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}
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return interpolation.name
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}
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if (interpolation.styles !== undefined) {
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let next = interpolation.next
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if (next !== undefined) {
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// not the most efficient thing ever but this is a pretty rare case
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// and there will be very few iterations of this generally
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while (next !== undefined) {
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cursor = {
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name: next.name,
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styles: next.styles,
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next: cursor
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}
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next = next.next
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}
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}
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let styles = `${interpolation.styles};`
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if (
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process.env.NODE_ENV !== 'production' &&
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interpolation.map !== undefined
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) {
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styles += interpolation.map
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}
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return styles
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}
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return createStringFromObject(mergedProps, registered, interpolation)
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}
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case 'function': {
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if (mergedProps !== undefined) {
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let previousCursor = cursor
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let result = interpolation(mergedProps)
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cursor = previousCursor
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return handleInterpolation(mergedProps, registered, result)
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} else if (process.env.NODE_ENV !== 'production') {
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console.error(
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'Functions that are interpolated in css calls will be stringified.\n' +
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'If you want to have a css call based on props, create a function that returns a css call like this\n' +
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'let dynamicStyle = (props) => css`color: ${props.color}`\n' +
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'It can be called directly with props or interpolated in a styled call like this\n' +
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"let SomeComponent = styled('div')`${dynamicStyle}`"
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)
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}
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break
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}
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case 'string':
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if (process.env.NODE_ENV !== 'production') {
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const matched = []
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const replaced = interpolation.replace(
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animationRegex,
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(match, p1, p2) => {
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const fakeVarName = `animation${matched.length}`
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matched.push(
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`const ${fakeVarName} = keyframes\`${p2.replace(
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/^@keyframes animation-\w+/,
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''
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)}\``
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)
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return `\${${fakeVarName}}`
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}
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)
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if (matched.length) {
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console.error(
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'`keyframes` output got interpolated into plain string, please wrap it with `css`.\n\n' +
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'Instead of doing this:\n\n' +
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[...matched, `\`${replaced}\``].join('\n') +
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'\n\nYou should wrap it with `css` like this:\n\n' +
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`css\`${replaced}\``
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)
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}
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}
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break
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}
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// finalize string values (regular strings and functions interpolated into css calls)
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if (registered == null) {
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return interpolation
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}
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const cached = registered[interpolation]
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return cached !== undefined ? cached : interpolation
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}
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function createStringFromObject(
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mergedProps: void | Object,
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registered: RegisteredCache | void,
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obj: { [key: string]: Interpolation }
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): string {
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let string = ''
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if (Array.isArray(obj)) {
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for (let i = 0; i < obj.length; i++) {
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string += `${handleInterpolation(mergedProps, registered, obj[i])};`
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}
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} else {
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for (let key in obj) {
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let value = obj[key]
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if (typeof value !== 'object') {
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if (registered != null && registered[value] !== undefined) {
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string += `${key}{${registered[value]}}`
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} else if (isProcessableValue(value)) {
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string += `${processStyleName(key)}:${processStyleValue(key, value)};`
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}
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} else {
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if (
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key === 'NO_COMPONENT_SELECTOR' &&
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process.env.NODE_ENV !== 'production'
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) {
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throw new Error(noComponentSelectorMessage)
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}
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if (
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Array.isArray(value) &&
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typeof value[0] === 'string' &&
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(registered == null || registered[value[0]] === undefined)
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) {
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for (let i = 0; i < value.length; i++) {
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if (isProcessableValue(value[i])) {
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string += `${processStyleName(key)}:${processStyleValue(
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key,
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value[i]
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)};`
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}
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}
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} else {
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const interpolated = handleInterpolation(
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mergedProps,
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registered,
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value
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)
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switch (key) {
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case 'animation':
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case 'animationName': {
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string += `${processStyleName(key)}:${interpolated};`
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break
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}
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default: {
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if (
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process.env.NODE_ENV !== 'production' &&
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key === 'undefined'
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) {
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console.error(UNDEFINED_AS_OBJECT_KEY_ERROR)
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}
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string += `${key}{${interpolated}}`
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}
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}
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}
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}
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}
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}
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return string
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}
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let labelPattern = /label:\s*([^\s;\n{]+)\s*(;|$)/g
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let sourceMapPattern
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if (process.env.NODE_ENV !== 'production') {
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sourceMapPattern =
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/\/\*#\ssourceMappingURL=data:application\/json;\S+\s+\*\//g
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}
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// this is the cursor for keyframes
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// keyframes are stored on the SerializedStyles object as a linked list
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let cursor
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export const serializeStyles = function (
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args: Array<Interpolation>,
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registered: RegisteredCache | void,
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mergedProps: void | Object
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): SerializedStyles {
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if (
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args.length === 1 &&
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typeof args[0] === 'object' &&
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args[0] !== null &&
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args[0].styles !== undefined
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) {
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return args[0]
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}
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let stringMode = true
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let styles = ''
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cursor = undefined
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let strings = args[0]
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if (strings == null || strings.raw === undefined) {
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stringMode = false
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styles += handleInterpolation(mergedProps, registered, strings)
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} else {
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if (process.env.NODE_ENV !== 'production' && strings[0] === undefined) {
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console.error(ILLEGAL_ESCAPE_SEQUENCE_ERROR)
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}
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styles += strings[0]
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}
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// we start at 1 since we've already handled the first arg
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for (let i = 1; i < args.length; i++) {
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styles += handleInterpolation(mergedProps, registered, args[i])
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if (stringMode) {
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if (process.env.NODE_ENV !== 'production' && strings[i] === undefined) {
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console.error(ILLEGAL_ESCAPE_SEQUENCE_ERROR)
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}
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styles += strings[i]
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}
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}
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let sourceMap
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if (process.env.NODE_ENV !== 'production') {
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styles = styles.replace(sourceMapPattern, match => {
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sourceMap = match
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return ''
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})
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}
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// using a global regex with .exec is stateful so lastIndex has to be reset each time
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labelPattern.lastIndex = 0
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let identifierName = ''
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let match
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// https://esbench.com/bench/5b809c2cf2949800a0f61fb5
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while ((match = labelPattern.exec(styles)) !== null) {
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identifierName +=
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'-' +
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// $FlowFixMe we know it's not null
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match[1]
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}
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let name = hashString(styles) + identifierName
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if (process.env.NODE_ENV !== 'production') {
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// $FlowFixMe SerializedStyles type doesn't have toString property (and we don't want to add it)
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return {
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name,
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styles,
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map: sourceMap,
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next: cursor,
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toString() {
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return "You have tried to stringify object returned from `css` function. It isn't supposed to be used directly (e.g. as value of the `className` prop), but rather handed to emotion so it can handle it (e.g. as value of `css` prop)."
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}
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}
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}
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return {
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name,
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styles,
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next: cursor
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}
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}
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