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Implement isRednered #23

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thepaperpilot merged 2 commits from thepaperpilot/Profectus:feature/is-rendered into main 2023-11-05 16:59:38 +00:00
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src/data/common.tsx
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@ -9,6 +9,7 @@ import { Resource, displayResource } from "features/resources/resource";
import type { GenericTree, GenericTreeNode, TreeNode, TreeNodeOptions } from "features/trees/tree";
import { createTreeNode } from "features/trees/tree";
import type { GenericFormula } from "game/formulas/types";
import { BaseLayer } from "game/layers";
import type { Modifier } from "game/modifiers";
import type { Persistent } from "game/persistence";
import { DefaultValue, persistent } from "game/persistence";
@ -485,3 +486,16 @@ export function createFormulaPreview(
return <>{formatSmall(formula.evaluate())}</>;
});
}
/**
* Utility function for getting a computed boolean for whether or not a given feature is currently rendered in the DOM.
* Note it will have a true value even if the feature is off screen.
* @param layer The layer the feature appears within
* @param id The ID of the feature
*/
export function isRendered(layer: BaseLayer, id: string): ComputedRef<boolean>;
export function isRendered(layer: BaseLayer, feature: { id: string }): ComputedRef<boolean>;
export function isRendered(layer: BaseLayer, idOrFeature: string | { id: string }) {
const id = typeof idOrFeature === "string" ? idOrFeature : idOrFeature.id;
return computed(() => id in layer.nodes.value);
}