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
|
import { TIMELINE_CONSTANTS } from "@/constants/timeline-constants";
export const TIMELINE_INDICATOR_LINE_WIDTH_PX = 2;
function getDevicePixelRatio({
devicePixelRatio,
}: {
devicePixelRatio?: number;
}): number {
if (
typeof devicePixelRatio === "number" &&
Number.isFinite(devicePixelRatio) &&
devicePixelRatio > 0
) {
return devicePixelRatio;
}
if (typeof window === "undefined") {
return 1;
}
if (Number.isFinite(window.devicePixelRatio) && window.devicePixelRatio > 0) {
return window.devicePixelRatio;
}
return 1;
}
export function getTimelinePixelsPerSecond({
zoomLevel,
}: {
zoomLevel: number;
}): number {
return TIMELINE_CONSTANTS.PIXELS_PER_SECOND * zoomLevel;
}
export function timelineTimeToPixels({
time,
zoomLevel,
}: {
time: number;
zoomLevel: number;
}): number {
return time * getTimelinePixelsPerSecond({ zoomLevel });
}
export function snapPixelToDeviceGrid({
pixel,
devicePixelRatio,
}: {
pixel: number;
devicePixelRatio?: number;
}): number {
const safeDevicePixelRatio = getDevicePixelRatio({ devicePixelRatio });
return Math.round(pixel * safeDevicePixelRatio) / safeDevicePixelRatio;
}
export function timelineTimeToSnappedPixels({
time,
zoomLevel,
devicePixelRatio,
}: {
time: number;
zoomLevel: number;
devicePixelRatio?: number;
}): number {
const rawPixel = timelineTimeToPixels({ time, zoomLevel });
return snapPixelToDeviceGrid({ pixel: rawPixel, devicePixelRatio });
}
export function getCenteredLineLeft({
centerPixel,
lineWidthPx = TIMELINE_INDICATOR_LINE_WIDTH_PX,
}: {
centerPixel: number;
lineWidthPx?: number;
}): number {
return centerPixel - lineWidthPx / 2;
}
|
