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import type {
Point3,
ReferenceCompatibleOptions,
ViewReference,
} from '../../types';
import type { PlaneRestriction } from '../../types/IViewport';
import imageIdToURI from '../../utilities/imageIdToURI';
import isEqual from '../../utilities/isEqual';
export type GenericViewportReferenceContext = {
allowAnyImageReference?: boolean;
cameraFocalPoint?: Point3;
currentImageIdIndex?: number;
dataId?: string;
dataIds?: string[];
dimensionGroupNumber?: number;
frameOfReferenceUID?: string;
imageIds?: string[];
imageURIs?: string[];
numDimensionGroups?: number;
viewPlaneNormal?: Point3;
volumeId?: string;
volumeIds?: string[];
};
/**
* Standard GenericViewport compatibility predicate for view references.
*/
export function isGenericViewportReferenceViewable(
viewRef: ViewReference,
contexts: GenericViewportReferenceContext[],
options: ReferenceCompatibleOptions = {}
): boolean {
if (!viewRef) {
return false;
}
return contexts.some((context) =>
isReferenceViewableInContext(viewRef, context, options)
);
}
export function getDimensionGroupReferenceContext(
value: unknown
): Pick<
GenericViewportReferenceContext,
'dimensionGroupNumber' | 'numDimensionGroups'
> {
const candidate = value as
| {
dimensionGroupNumber?: unknown;
numDimensionGroups?: unknown;
}
| undefined;
const dimensionGroupNumber = toPositiveInteger(
candidate?.dimensionGroupNumber
);
const numDimensionGroups = toPositiveInteger(candidate?.numDimensionGroups);
return {
dimensionGroupNumber,
numDimensionGroups,
};
}
function isReferenceViewableInContext(
viewRef: ViewReference,
context: GenericViewportReferenceContext,
options: ReferenceCompatibleOptions
): boolean {
if (!isFrameOfReferenceCompatible(viewRef, context)) {
return false;
}
if (!isDataIdCompatible(viewRef, context)) {
return false;
}
if (!isVolumeIdCompatible(viewRef, context)) {
return false;
}
if (!isPlaneCompatible(viewRef, context, options)) {
return false;
}
if (!isReferencedImageCompatible(viewRef, context, options)) {
return false;
}
if (!isDimensionGroupCompatible(viewRef, context, options)) {
return false;
}
return isSliceIndexCompatible(viewRef, context, options);
}
function isFrameOfReferenceCompatible(
viewRef: ViewReference,
context: GenericViewportReferenceContext
): boolean {
return (
!viewRef.FrameOfReferenceUID ||
viewRef.FrameOfReferenceUID === context.frameOfReferenceUID
);
}
function isDataIdCompatible(
viewRef: ViewReference,
context: GenericViewportReferenceContext
): boolean {
if (!viewRef.dataId) {
return true;
}
return getContextDataIds(context).includes(viewRef.dataId);
}
function isVolumeIdCompatible(
viewRef: ViewReference,
context: GenericViewportReferenceContext
): boolean {
if (!viewRef.volumeId) {
return true;
}
return getContextVolumeIds(context).includes(viewRef.volumeId);
}
function isPlaneCompatible(
viewRef: ViewReference,
context: GenericViewportReferenceContext,
options: ReferenceCompatibleOptions
): boolean {
if (viewRef.planeRestriction) {
return isPlaneRestrictionViewable(
viewRef.planeRestriction,
context,
options
);
}
if (!viewRef.viewPlaneNormal) {
return true;
}
const { viewPlaneNormal } = context;
if (!viewPlaneNormal) {
return false;
}
return (
isEqual(viewRef.viewPlaneNormal, viewPlaneNormal) ||
isEqual(
vec3.negate(vec3.create(), viewPlaneNormal as unknown as vec3) as Point3,
viewRef.viewPlaneNormal
) ||
Boolean(options.withOrientation)
);
}
function isPlaneRestrictionViewable(
planeRestriction: PlaneRestriction,
context: GenericViewportReferenceContext,
options: ReferenceCompatibleOptions
): boolean {
if (planeRestriction.FrameOfReferenceUID !== context.frameOfReferenceUID) {
return false;
}
if (options.withOrientation) {
return true;
}
const { cameraFocalPoint, viewPlaneNormal } = context;
if (!cameraFocalPoint || !viewPlaneNormal) {
return false;
}
if (
planeRestriction.inPlaneVector1 &&
!isEqual(
0,
vec3.dot(
viewPlaneNormal as unknown as vec3,
planeRestriction.inPlaneVector1 as unknown as vec3
)
)
) {
return false;
}
if (
planeRestriction.inPlaneVector2 &&
!isEqual(
0,
vec3.dot(
viewPlaneNormal as unknown as vec3,
planeRestriction.inPlaneVector2 as unknown as vec3
)
)
) {
return false;
}
if (options.withNavigation) {
return true;
}
const pointVector = vec3.sub(
vec3.create(),
planeRestriction.point as unknown as vec3,
cameraFocalPoint as unknown as vec3
);
return isEqual(0, vec3.dot(pointVector, viewPlaneNormal as unknown as vec3));
}
function isReferencedImageCompatible(
viewRef: ViewReference,
context: GenericViewportReferenceContext,
options: ReferenceCompatibleOptions
): boolean {
if (
viewRef.planeRestriction &&
viewRef.volumeId &&
getContextVolumeIds(context).includes(viewRef.volumeId)
) {
return true;
}
const referencedImageURIs = getReferencedImageURIs(viewRef);
if (!referencedImageURIs.length) {
return true;
}
const imageURIEntries = getContextImageURIEntries(context);
if (!imageURIEntries.length) {
return false;
}
const currentImageIdIndex = context.currentImageIdIndex ?? 0;
const currentImageURIEntry = imageURIEntries[currentImageIdIndex];
if (imageURIEntryMatches(currentImageURIEntry, referencedImageURIs)) {
return true;
}
const foundSliceIndex = imageURIEntries.findIndex((imageURIEntry) =>
imageURIEntryMatches(imageURIEntry, referencedImageURIs)
);
if (foundSliceIndex === -1) {
return false;
}
if (context.allowAnyImageReference) {
return true;
}
if (options.withNavigation) {
return true;
}
const rangeEndSliceIndex = getReferencedImageRangeEndIndex(
imageURIEntries,
viewRef
);
if (rangeEndSliceIndex !== undefined) {
const start = Math.min(foundSliceIndex, rangeEndSliceIndex);
const end = Math.max(foundSliceIndex, rangeEndSliceIndex);
return start <= currentImageIdIndex && currentImageIdIndex <= end;
}
return currentImageIdIndex === foundSliceIndex;
}
function isDimensionGroupCompatible(
viewRef: ViewReference,
context: GenericViewportReferenceContext,
options: ReferenceCompatibleOptions
): boolean {
const hasDimensionGroupRestriction =
typeof viewRef.dimensionGroupNumber !== 'undefined';
const dimensionGroupNumber = toPositiveInteger(viewRef.dimensionGroupNumber);
if (!hasDimensionGroupRestriction) {
return true;
}
if (!dimensionGroupNumber) {
return false;
}
if (context.dimensionGroupNumber === dimensionGroupNumber) {
return true;
}
if (!options.withNavigation) {
return false;
}
return (
typeof context.numDimensionGroups === 'number' &&
dimensionGroupNumber <= context.numDimensionGroups
);
}
function isSliceIndexCompatible(
viewRef: ViewReference,
context: GenericViewportReferenceContext,
options: ReferenceCompatibleOptions
): boolean {
const sliceIndex = viewRef.sliceIndex as
| number
| [number, number]
| undefined;
if (sliceIndex === undefined) {
return true;
}
const { currentImageIdIndex } = context;
if (Array.isArray(sliceIndex)) {
if (typeof currentImageIdIndex === 'number') {
return (
sliceIndex[0] <= currentImageIdIndex &&
currentImageIdIndex <= sliceIndex[1]
);
}
return false;
}
if (!Number.isFinite(sliceIndex)) {
return false;
}
if (currentImageIdIndex === sliceIndex) {
return true;
}
if (!options.withNavigation) {
return false;
}
return isIndexInImageRange(sliceIndex, context.imageIds);
}
function getReferencedImageURIs(viewRef: ViewReference): string[] {
return uniqueStrings([
viewRef.referencedImageURI,
...(viewRef.referencedImageId
? getImageIdCompatibleURIs(viewRef.referencedImageId)
: []),
]);
}
function getReferencedImageRangeEndIndex(
imageURIEntries: string[][],
viewRef: ViewReference
): number | undefined {
const rangeEndImageURI =
viewRef.multiSliceReference &&
getReferencedImageURIs(viewRef.multiSliceReference);
if (!rangeEndImageURI?.length) {
return;
}
const rangeEndSliceIndex = imageURIEntries.findIndex((imageURIEntry) =>
imageURIEntryMatches(imageURIEntry, rangeEndImageURI)
);
return rangeEndSliceIndex === -1 ? undefined : rangeEndSliceIndex;
}
// Cache the compatible URIs for a given imageId. imageId -> URI is a pure,
// stable mapping, so memoizing it avoids re-parsing the same strings on every
// reference-compatibility check (these run once per labelmap image while
// resolving stack segmentation references).
const imageIdCompatibleURIsCache = new Map<string, string[]>();
// Cache the per-imageId URI entries for a given imageIds array, keyed on the
// array reference. Reference compatibility is evaluated once per labelmap image
// when resolving stack segmentation references, so without this the full
// imageId -> URI mapping is rebuilt O(labelmapImages x stackImages) times per
// scroll/brush stroke. The imageIds array is replaced (not mutated) when the
// dataset changes, so reference identity is a safe, self-invalidating key.
const imageIdsURIEntriesCache = new WeakMap<string[], string[][]>();
function getImageIdsURIEntries(imageIds: string[]): string[][] {
let entries = imageIdsURIEntriesCache.get(imageIds);
if (!entries) {
entries = imageIds.map((imageId) => getImageIdCompatibleURIs(imageId));
imageIdsURIEntriesCache.set(imageIds, entries);
}
return entries;
}
function getContextImageURIEntries(
context: GenericViewportReferenceContext
): string[][] {
const baseEntries = context.imageIds?.length
? getImageIdsURIEntries(context.imageIds)
: [];
const extraImageURIs = context.imageURIs;
if (!extraImageURIs?.length) {
// Common path. Callers only read the entries, so returning the cached
// array directly is safe and avoids any per-call allocation.
return baseEntries;
}
// Rare path: merge standalone imageURIs not already covered by the cached
// imageId-derived entries. Copy first so the cached array is never mutated.
const imageURIEntries = baseEntries.slice();
const knownImageURIs = new Set<string>();
for (const imageURIEntry of baseEntries) {
for (const imageURI of imageURIEntry) {
knownImageURIs.add(imageURI);
}
}
for (const imageURI of extraImageURIs) {
if (!knownImageURIs.has(imageURI)) {
imageURIEntries.push([imageURI]);
knownImageURIs.add(imageURI);
}
}
return imageURIEntries;
}
function getImageIdCompatibleURIs(imageId: string): string[] {
let uris = imageIdCompatibleURIsCache.get(imageId);
if (!uris) {
uris = uniqueStrings([imageIdToURI(imageId), getLegacyImageIdURI(imageId)]);
imageIdCompatibleURIsCache.set(imageId, uris);
}
return uris;
}
function getLegacyImageIdURI(imageId: string): string {
const colonIndex = imageId.indexOf(':');
return colonIndex === -1 ? imageId : imageId.substring(colonIndex + 1);
}
function imageURIEntryMatches(
imageURIEntry: string[] | undefined,
referencedImageURIs: string[]
): boolean {
return Boolean(
imageURIEntry?.some((imageURI) => referencedImageURIs.includes(imageURI))
);
}
function getContextDataIds(context: GenericViewportReferenceContext): string[] {
return uniqueStrings([context.dataId, ...(context.dataIds || [])]);
}
function getContextVolumeIds(
context: GenericViewportReferenceContext
): string[] {
return uniqueStrings([context.volumeId, ...(context.volumeIds || [])]);
}
function isIndexInImageRange(index: number, imageIds?: string[]): boolean {
if (!imageIds?.length) {
return true;
}
return index >= 0 && index < imageIds.length;
}
function uniqueStrings(values: Array<string | undefined>): string[] {
return Array.from(
new Set(
values.filter((value): value is string => typeof value === 'string')
)
);
}
function toPositiveInteger(value: unknown): number | undefined {
if (typeof value !== 'number' || !Number.isInteger(value) || value < 1) {
return;
}
return value;
}
|