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interface GetScale {
height: number
innerHeight: number
innerWidth: number
width: number
zoomMargin: number
}
export const getScale = ({
height,
innerHeight,
innerWidth,
width,
zoomMargin
}: GetScale): number => {
const scaleX = innerWidth / (width + zoomMargin)
const scaleY = innerHeight / (height + zoomMargin)
const scale = Math.min(scaleX, scaleY)
return scale
}
interface GetModalContentStyle {
height: number
innerHeight: number
innerWidth: number
isLoaded: boolean
isUnloading: boolean
left: number
originalTransform: string | null
top: number
transitionDuration: number
width: number
zoomMargin: number
}
type GetModalContentStyleReturnType = {
height: number
left: number
top: number
transform: string
WebkitTransform: string
transitionDuration: string
width: number
}
export const getModalContentStyle = ({
height,
innerHeight,
innerWidth,
isLoaded,
isUnloading,
left,
originalTransform,
top,
transitionDuration,
width,
zoomMargin
}: GetModalContentStyle): GetModalContentStyleReturnType => {
const transitionDurationString = toDurationString(transitionDuration)
if (!isLoaded || isUnloading) {
const initTransform = [
`scale(1)`,
`translate(0, 0)`,
...(originalTransform ? [originalTransform] : [])
].join(' ')
return {
height,
left,
top,
transform: initTransform,
WebkitTransform: initTransform,
transitionDuration: transitionDurationString,
width
}
}
// Get amount to scale item
const scale = getScale({
height,
innerWidth,
innerHeight,
width,
zoomMargin
})
// Get the the coords for center of the viewport
const viewportX = innerWidth / 2
const viewportY = innerHeight / 2
// Get the coords for center of the parent item
const childCenterX = left + width / 2
const childCenterY = top + height / 2
// Get offset amounts for item coords to be centered on screen
const translateX = (viewportX - childCenterX) / scale
const translateY = (viewportY - childCenterY) / scale
// Build transform style, including any original transform
const transform = [
`scale(${scale})`,
`translate(${translateX}px, ${translateY}px)`,
...(originalTransform ? [originalTransform] : [])
].join(' ')
return {
height,
left,
top,
transform,
WebkitTransform: transform,
transitionDuration: transitionDurationString,
width
}
}
interface GetModalOverlayStyle {
isLoaded: boolean
isUnloading: boolean
overlayBgColorEnd: string
overlayBgColorStart: string
transitionDuration: number
zoomZindex: number
}
type GetModalOverlayStyleReturnType = {
backgroundColor: string
transitionDuration: string
zIndex: number
}
export const getModalOverlayStyle = ({
isLoaded,
isUnloading,
overlayBgColorEnd,
overlayBgColorStart,
transitionDuration,
zoomZindex
}: GetModalOverlayStyle): GetModalOverlayStyleReturnType => {
const style = {
backgroundColor: overlayBgColorStart,
transitionDuration: toDurationString(transitionDuration),
zIndex: zoomZindex
}
if (isLoaded && !isUnloading) {
style.backgroundColor = overlayBgColorEnd
}
return style
}
// @TODO: test
// if parentRef.current is not available yet,
// we can fall back to these defaults
type GetBoundingClientRectReturnType = {
height: number
left: number
top: number
width: number
}
export const pseudoParentEl = {
getBoundingClientRect: (): GetBoundingClientRectReturnType => ({
height: 0,
left: 0,
top: 0,
width: 0
}),
style: {
transform: null
}
}
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