-
Notifications
You must be signed in to change notification settings - Fork 739
/
unit-conversion.ts
301 lines (261 loc) · 10.3 KB
/
unit-conversion.ts
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
import { number, px, ValueType } from "style-value-types"
import { Target, TargetWithKeyframes } from "../../../types"
import { isKeyframesTarget } from "../../../animation/utils/is-keyframes-target"
import { invariant } from "hey-listen"
import { MotionValue } from "../../../value"
import { transformProps } from "../../html/utils/transform"
import { VisualElement } from "../../types"
import { findDimensionValueType } from "../value-types/dimensions"
import { Box } from "../../../projection/geometry/types"
const positionalKeys = new Set([
"width",
"height",
"top",
"left",
"right",
"bottom",
"x",
"y",
])
const isPositionalKey = (key: string) => positionalKeys.has(key)
const hasPositionalKey = (target: TargetWithKeyframes) => {
return Object.keys(target).some(isPositionalKey)
}
const setAndResetVelocity = (value: MotionValue, to: string | number) => {
// Looks odd but setting it twice doesn't render, it'll just
// set both prev and current to the latest value
value.set(to, false)
value.set(to)
}
const isNumOrPxType = (v?: ValueType): v is ValueType =>
v === number || v === px
export enum BoundingBoxDimension {
width = "width",
height = "height",
left = "left",
right = "right",
top = "top",
bottom = "bottom",
}
type GetActualMeasurementInPixels = (
bbox: Box,
computedStyle: Partial<CSSStyleDeclaration>
) => number
const getPosFromMatrix = (matrix: string, pos: number) =>
parseFloat(matrix.split(", ")[pos])
const getTranslateFromMatrix =
(pos2: number, pos3: number): GetActualMeasurementInPixels =>
(_bbox, { transform }) => {
if (transform === "none" || !transform) return 0
const matrix3d = transform.match(/^matrix3d\((.+)\)$/)
if (matrix3d) {
return getPosFromMatrix(matrix3d[1], pos3)
} else {
const matrix = transform.match(/^matrix\((.+)\)$/) as string[]
if (matrix) {
return getPosFromMatrix(matrix[1], pos2)
} else {
return 0
}
}
}
const transformKeys = new Set(["x", "y", "z"])
const nonTranslationalTransformKeys = transformProps.filter(
(key) => !transformKeys.has(key)
)
type RemovedTransforms = [string, string | number][]
function removeNonTranslationalTransform(visualElement: VisualElement) {
const removedTransforms: RemovedTransforms = []
nonTranslationalTransformKeys.forEach((key) => {
const value: MotionValue<string | number> | undefined =
visualElement.getValue(key)
if (value !== undefined) {
removedTransforms.push([key, value.get()])
value.set(key.startsWith("scale") ? 1 : 0)
}
})
// Apply changes to element before measurement
if (removedTransforms.length) visualElement.syncRender()
return removedTransforms
}
export const positionalValues: { [key: string]: GetActualMeasurementInPixels } =
{
// Dimensions
width: ({ x }, { paddingLeft = "0", paddingRight = "0" }) =>
x.max - x.min - parseFloat(paddingLeft) - parseFloat(paddingRight),
height: ({ y }, { paddingTop = "0", paddingBottom = "0" }) =>
y.max - y.min - parseFloat(paddingTop) - parseFloat(paddingBottom),
top: (_bbox, { top }) => parseFloat(top as string),
left: (_bbox, { left }) => parseFloat(left as string),
bottom: ({ y }, { top }) => parseFloat(top as string) + (y.max - y.min),
right: ({ x }, { left }) =>
parseFloat(left as string) + (x.max - x.min),
// Transform
x: getTranslateFromMatrix(4, 13),
y: getTranslateFromMatrix(5, 14),
}
const convertChangedValueTypes = (
target: TargetWithKeyframes,
visualElement: VisualElement,
changedKeys: string[]
) => {
const originBbox = visualElement.measureViewportBox()
const element = visualElement.getInstance()
const elementComputedStyle = getComputedStyle(element)
const { display } = elementComputedStyle
// If the element is currently set to display: "none", make it visible before
// measuring the target bounding box
if (display === "none") {
visualElement.setStaticValue(
"display",
(target.display as string) || "block"
)
}
// Apply the latest values (as set in checkAndConvertChangedValueTypes)
visualElement.syncRender()
const targetBbox = visualElement.measureViewportBox()
changedKeys.forEach((key) => {
// Restore styles to their **calculated computed style**, not their actual
// originally set style. This allows us to animate between equivalent pixel units.
const value = visualElement.getValue(key) as MotionValue
setAndResetVelocity(
value,
positionalValues[key](originBbox, elementComputedStyle)
)
target[key] = positionalValues[key](targetBbox, elementComputedStyle)
})
return target
}
const checkAndConvertChangedValueTypes = (
visualElement: VisualElement,
target: TargetWithKeyframes,
origin: Target = {},
transitionEnd: Target = {}
): { target: TargetWithKeyframes; transitionEnd: Target } => {
target = { ...target }
transitionEnd = { ...transitionEnd }
const targetPositionalKeys = Object.keys(target).filter(isPositionalKey)
// We want to remove any transform values that could affect the element's bounding box before
// it's measured. We'll reapply these later.
let removedTransformValues: RemovedTransforms = []
let hasAttemptedToRemoveTransformValues = false
const changedValueTypeKeys: string[] = []
targetPositionalKeys.forEach((key) => {
const value = visualElement.getValue(key) as MotionValue<
number | string
>
if (!visualElement.hasValue(key)) return
let from = origin[key]
let fromType = findDimensionValueType(from)
const to = target[key]
let toType
// TODO: The current implementation of this basically throws an error
// if you try and do value conversion via keyframes. There's probably
// a way of doing this but the performance implications would need greater scrutiny,
// as it'd be doing multiple resize-remeasure operations.
if (isKeyframesTarget(to)) {
const numKeyframes = to.length
const fromIndex = to[0] === null ? 1 : 0
from = to[fromIndex]
fromType = findDimensionValueType(from)
for (let i = fromIndex; i < numKeyframes; i++) {
if (!toType) {
toType = findDimensionValueType(to[i])
invariant(
toType === fromType ||
(isNumOrPxType(fromType) && isNumOrPxType(toType)),
"Keyframes must be of the same dimension as the current value"
)
} else {
invariant(
findDimensionValueType(to[i]) === toType,
"All keyframes must be of the same type"
)
}
}
} else {
toType = findDimensionValueType(to)
}
if (fromType !== toType) {
// If they're both just number or px, convert them both to numbers rather than
// relying on resize/remeasure to convert (which is wasteful in this situation)
if (isNumOrPxType(fromType) && isNumOrPxType(toType)) {
const current = value.get()
if (typeof current === "string") {
value.set(parseFloat(current))
}
if (typeof to === "string") {
target[key] = parseFloat(to)
} else if (Array.isArray(to) && toType === px) {
target[key] = to.map(parseFloat)
}
} else if (
fromType?.transform &&
toType?.transform &&
(from === 0 || to === 0)
) {
// If one or the other value is 0, it's safe to coerce it to the
// type of the other without measurement
if (from === 0) {
value.set((toType as any).transform(from))
} else {
target[key] = (fromType as any).transform(to)
}
} else {
// If we're going to do value conversion via DOM measurements, we first
// need to remove non-positional transform values that could affect the bbox measurements.
if (!hasAttemptedToRemoveTransformValues) {
removedTransformValues =
removeNonTranslationalTransform(visualElement)
hasAttemptedToRemoveTransformValues = true
}
changedValueTypeKeys.push(key)
transitionEnd[key] =
transitionEnd[key] !== undefined
? transitionEnd[key]
: target[key]
setAndResetVelocity(value, to)
}
}
})
if (changedValueTypeKeys.length) {
const convertedTarget = convertChangedValueTypes(
target,
visualElement,
changedValueTypeKeys
)
// If we removed transform values, reapply them before the next render
if (removedTransformValues.length) {
removedTransformValues.forEach(([key, value]) => {
visualElement.getValue(key)!.set(value)
})
}
// Reapply original values
visualElement.syncRender()
return { target: convertedTarget, transitionEnd }
} else {
return { target, transitionEnd }
}
}
/**
* Convert value types for x/y/width/height/top/left/bottom/right
*
* Allows animation between `'auto'` -> `'100%'` or `0` -> `'calc(50% - 10vw)'`
*
* @internal
*/
export function unitConversion(
visualElement: VisualElement,
target: TargetWithKeyframes,
origin?: Target,
transitionEnd?: Target
): { target: TargetWithKeyframes; transitionEnd?: Target } {
return hasPositionalKey(target)
? checkAndConvertChangedValueTypes(
visualElement,
target,
origin,
transitionEnd
)
: { target, transitionEnd }
}