Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 | 128x | import type { ViewPresentation } from '../../../types';
import type { ViewPresentationSelector } from '../../../types/IViewport';
import type { ProjectionWriteOptions } from '../ViewportProjectionTypes';
import type { WSIProjectionSnapshot } from './WSIProjectionTypes';
import type { WSIViewState } from './WSIViewportTypes';
const DEFAULT_SELECTOR: Required<
Pick<ViewPresentationSelector, 'rotation' | 'zoom'>
> = {
rotation: true,
zoom: true,
};
/**
* Narrows a presentation patch to fields explicitly provided by the caller.
*/
function hasOwn<T extends object, K extends PropertyKey>(
obj: T,
key: K
): obj is T & Record<K, unknown> {
return Object.prototype.hasOwnProperty.call(obj, key);
}
/**
* Converts a WSI projection snapshot to the public view-presentation shape.
*/
export function getWSIProjectionPresentation(
snapshot: WSIProjectionSnapshot,
selector: ViewPresentationSelector | undefined
): ViewPresentation {
const target: ViewPresentation = {};
const wsiSelector = selector ?? DEFAULT_SELECTOR;
if (wsiSelector.zoom) {
target.zoom = snapshot.presentation.zoom;
}
if (wsiSelector.rotation) {
target.rotation = snapshot.presentation.rotation;
}
return target;
}
/**
* Converts a WSI view-presentation patch back into semantic WSI view state.
*/
export function withWSIProjectionPresentation(
snapshot: WSIProjectionSnapshot,
presentation: Partial<ViewPresentation>,
options: ProjectionWriteOptions = {}
): WSIViewState {
const hasZoom = hasOwn(presentation, 'zoom');
const hasRotation = hasOwn(presentation, 'rotation');
const nextZoom = Math.max(
presentation.zoom ??
snapshot.presentation.zoom ??
snapshot.viewState.zoom ??
1,
0.001
);
let nextViewState: WSIViewState = {
...snapshot.viewState,
centerIndex: snapshot.viewState.centerIndex
? [snapshot.viewState.centerIndex[0], snapshot.viewState.centerIndex[1]]
: undefined,
};
if (hasZoom) {
if (snapshot.resolvedView) {
nextViewState = {
...snapshot.resolvedView.withZoom(nextZoom, options.anchorCanvas).state
.viewState,
};
} else {
nextViewState.zoom = nextZoom;
}
}
if (hasRotation) {
nextViewState.rotation = presentation.rotation ?? 0;
}
return nextViewState;
}
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