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
|
import type { TimelineTrack } from "@/timeline";
import { timelineTimeToPixels } from "@/timeline/pixel-utils";
import {
TIMELINE_CONTENT_TOP_PADDING_PX,
} from "./layout";
import { getCumulativeHeightBefore, getTrackHeight } from "./track-layout";
type TimelineElementRef = { trackId: string; elementId: string };
interface SelectionRectangle {
left: number;
top: number;
right: number;
bottom: number;
}
function getNormalizedRectangle({
startPos,
endPos,
}: {
startPos: { x: number; y: number };
endPos: { x: number; y: number };
}): SelectionRectangle {
return {
left: Math.min(startPos.x, endPos.x),
top: Math.min(startPos.y, endPos.y),
right: Math.max(startPos.x, endPos.x),
bottom: Math.max(startPos.y, endPos.y),
};
}
function getSelectionRectangleInContent({
container,
scrollContainer,
startPos,
endPos,
}: {
container: HTMLElement;
scrollContainer: HTMLDivElement | null;
startPos: { x: number; y: number };
endPos: { x: number; y: number };
}): SelectionRectangle {
const containerRect = container.getBoundingClientRect();
const scrollRect = scrollContainer?.getBoundingClientRect() ?? containerRect;
const scrollLeft = scrollContainer?.scrollLeft ?? 0;
const scrollTop = scrollContainer?.scrollTop ?? 0;
const adjustedStart = {
x: startPos.x - containerRect.left + scrollLeft,
y: startPos.y - scrollRect.top + scrollTop,
};
const adjustedEnd = {
x: endPos.x - containerRect.left + scrollLeft,
y: endPos.y - scrollRect.top + scrollTop,
};
return getNormalizedRectangle({
startPos: adjustedStart,
endPos: adjustedEnd,
});
}
function isRectangleIntersecting({
elementRectangle,
selectionRectangle,
}: {
elementRectangle: SelectionRectangle;
selectionRectangle: SelectionRectangle;
}): boolean {
return !(
elementRectangle.right < selectionRectangle.left ||
elementRectangle.left > selectionRectangle.right ||
elementRectangle.bottom < selectionRectangle.top ||
elementRectangle.top > selectionRectangle.bottom
);
}
export function resolveTimelineElementIntersections({
container,
scrollContainer,
tracks,
zoomLevel,
startPos,
currentPos,
}: {
container: HTMLElement;
scrollContainer: HTMLDivElement | null;
tracks: TimelineTrack[];
zoomLevel: number;
startPos: { x: number; y: number };
currentPos: { x: number; y: number };
}): TimelineElementRef[] {
const selectionRectangle = getSelectionRectangleInContent({
container,
scrollContainer,
startPos,
endPos: currentPos,
});
const selectedElements: TimelineElementRef[] = [];
for (const [trackIndex, track] of tracks.entries()) {
const trackTop = getCumulativeHeightBefore({
tracks,
trackIndex,
});
const trackHeight = getTrackHeight({ type: track.type });
const elementTop = TIMELINE_CONTENT_TOP_PADDING_PX + trackTop;
const elementBottom = elementTop + trackHeight;
for (const element of track.elements) {
const elementLeft = timelineTimeToPixels({ time: element.startTime, zoomLevel });
const elementRight = timelineTimeToPixels({ time: element.startTime + element.duration, zoomLevel });
const elementRectangle = {
left: elementLeft,
top: elementTop,
right: elementRight,
bottom: elementBottom,
};
if (
isRectangleIntersecting({
elementRectangle,
selectionRectangle,
})
) {
selectedElements.push({
trackId: track.id,
elementId: element.id,
});
}
}
}
return selectedElements;
}
|
