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| 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 | 1x | import { triggerEvent, eventTarget } from '@cornerstonejs/core';
import Events from '../enums/Events';
import { Annotation } from '../types';
export type FramesRange = [number, number] | number;
/**
* This class handles the annotation frame range values for multiframes.
* Mostly used for the Video viewport, it allows references to
* a range of frame values.
*/
export default class AnnotationFrameRange {
protected static frameRangeExtractor =
/(\/frames\/|[&?]frameNumber=)([^/&?]*)/i;
protected static imageIdToFrames(imageId: string): FramesRange {
const match = imageId.match(this.frameRangeExtractor);
if (!match || !match[2]) {
return null;
}
const range = match[2].split('-').map((it) => Number(it));
if (range.length === 1) {
return range[0];
}
return range as FramesRange;
}
public static framesToString(range) {
if (Array.isArray(range)) {
return `${range[0]}-${range[1]}`;
}
return String(range);
}
protected static framesToImageId(
imageId: string,
range: FramesRange | string
): string {
const match = imageId.match(this.frameRangeExtractor);
if (!match || !match[2]) {
return null;
}
const newRangeString = this.framesToString(range);
return imageId.replace(
this.frameRangeExtractor,
`${match[1]}${newRangeString}`
);
}
/**
* Sets the range of frames to associate with the given annotation.
* The range can be a single frame number (1 based according to DICOM),
* or a range of values in the format `min-max` where min, max are inclusive
* Modifies the referencedImageID to specify the updated URL.
*/
public static setFrameRange(
annotation: Annotation,
range: FramesRange | string,
eventBase?: { viewportId; renderingEngineId }
) {
const { referencedImageId } = annotation.metadata;
annotation.metadata.referencedImageId = this.framesToImageId(
referencedImageId,
range
);
const eventDetail = {
...eventBase,
annotation,
};
triggerEvent(eventTarget, Events.ANNOTATION_MODIFIED, eventDetail);
}
public static getFrameRange(
annotation: Annotation
): number | [number, number] {
return this.imageIdToFrames(annotation.metadata.referencedImageId);
}
}
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