85 lines
3.1 KiB
TypeScript
85 lines
3.1 KiB
TypeScript
import type { ImageDocument } from "@core/document";
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import type { Rect } from "@core/geometry";
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import type { Layer } from "@core/layer";
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import type { ArtboardId, LayerId } from "@core/id";
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import type { TransformTarget } from "./transform";
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import { measureTextLayer } from "@core/text-layer";
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export function resolveTransformTargetBounds(document: ImageDocument, target: TransformTarget): Rect | undefined {
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switch (target.type) {
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case "artboard":
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return document.artboards.find((artboard) => artboard.id === target.id)?.bounds;
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case "layer": {
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const layer = findLayer(document, target.id);
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return layer ? resolveLayerBounds(document, layer) : undefined;
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}
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}
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}
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export function selectedTransformTarget(document: ImageDocument, selection: { artboardId?: ArtboardId; layerIds: LayerId[] }): TransformTarget | undefined {
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if (selection.layerIds.length === 1 && selection.layerIds[0]) return { type: "layer", id: selection.layerIds[0] };
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if (selection.artboardId) return { type: "artboard", id: selection.artboardId };
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return undefined;
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}
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function findLayer(document: ImageDocument, layerId: LayerId): Layer | undefined {
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for (const artboard of document.artboards) {
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const layer = findLayerInTree(artboard.layers, layerId);
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if (layer) return layer;
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}
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return undefined;
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}
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function findLayerInTree(layers: Layer[], layerId: LayerId): Layer | undefined {
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for (const layer of layers) {
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if (layer.id === layerId) return layer;
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if (layer.type === "group") {
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const child = findLayerInTree(layer.children, layerId);
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if (child) return child;
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}
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}
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return undefined;
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}
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function resolveLayerBounds(document: ImageDocument, layer: Layer): Rect | undefined {
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switch (layer.type) {
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case "group":
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return unionRects(layer.children.flatMap((child) => {
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const bounds = resolveLayerBounds(document, child);
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return bounds ? [bounds] : [];
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}));
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case "image":
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case "raster": {
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const asset = document.assets.find((candidate) => candidate.id === layer.assetId);
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if (!asset) return undefined;
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const source = layer.sourceRect ?? { x: 0, y: 0, ...asset.intrinsicSize };
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return {
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x: layer.transform.position.x + source.x * layer.transform.scale.x,
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y: layer.transform.position.y + source.y * layer.transform.scale.y,
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w: source.w * layer.transform.scale.x,
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h: source.h * layer.transform.scale.y,
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};
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}
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case "text": {
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const size = measureTextLayer(layer);
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return { x: layer.transform.position.x, y: layer.transform.position.y, w: size.w * layer.transform.scale.x, h: size.h * layer.transform.scale.y };
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}
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case "adjustment":
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return undefined;
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}
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}
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function unionRects(rects: Rect[]): Rect | undefined {
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if (rects.length === 0) return undefined;
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const minX = Math.min(...rects.map((rect) => rect.x));
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const minY = Math.min(...rects.map((rect) => rect.y));
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const maxX = Math.max(...rects.map((rect) => rect.x + rect.w));
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const maxY = Math.max(...rects.map((rect) => rect.y + rect.h));
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return { x: minX, y: minY, w: maxX - minX, h: maxY - minY };
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}
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