File name
Commit message
Commit date
File name
Commit message
Commit date
File name
Commit message
Commit date
File name
Commit message
Commit date
File name
Commit message
Commit date
import { SPACE, COMMA, LENGTH, NUMBER, ANGLE } from '../tokenTypes'
const oneOfType = tokenType => functionStream => {
const value = functionStream.expect(tokenType)
functionStream.expectEmpty()
return value
}
const singleNumber = oneOfType(NUMBER)
const singleLength = oneOfType(LENGTH)
const singleAngle = oneOfType(ANGLE)
const xyTransformFactory = tokenType => (
key,
valueIfOmitted
) => functionStream => {
const x = functionStream.expect(tokenType)
let y
if (functionStream.hasTokens()) {
functionStream.expect(COMMA)
y = functionStream.expect(tokenType)
} else if (valueIfOmitted !== undefined) {
y = valueIfOmitted
} else {
// Assumption, if x === y, then we can omit XY
// I.e. scale(5) => [{ scale: 5 }] rather than [{ scaleX: 5 }, { scaleY: 5 }]
return x
}
functionStream.expectEmpty()
return [{ [`${key}Y`]: y }, { [`${key}X`]: x }]
}
const xyNumber = xyTransformFactory(NUMBER)
const xyLength = xyTransformFactory(LENGTH)
const xyAngle = xyTransformFactory(ANGLE)
const partTransforms = {
perspective: singleNumber,
scale: xyNumber('scale'),
scaleX: singleNumber,
scaleY: singleNumber,
translate: xyLength('translate', 0),
translateX: singleLength,
translateY: singleLength,
rotate: singleAngle,
rotateX: singleAngle,
rotateY: singleAngle,
rotateZ: singleAngle,
skewX: singleAngle,
skewY: singleAngle,
skew: xyAngle('skew', '0deg'),
}
export default tokenStream => {
let transforms = []
let didParseFirst = false
while (tokenStream.hasTokens()) {
if (didParseFirst) tokenStream.expect(SPACE)
const functionStream = tokenStream.expectFunction()
const { functionName } = functionStream
let transformedValues = partTransforms[functionName](functionStream)
if (!Array.isArray(transformedValues)) {
transformedValues = [{ [functionName]: transformedValues }]
}
transforms = transformedValues.concat(transforms)
didParseFirst = true
}
return { transform: transforms }
}