| 1 | import type { SnapShotAccessibilityNode, SnapShotSource } from "@t3tools/contracts"; |
| 2 | |
| 3 | /** Keep image-relative accessibility coordinates aligned with a recompressed attachment. */ |
| 4 | export function resizeSnapShotSource( |
| 5 | source: SnapShotSource, |
| 6 | imageSize?: { readonly width: number; readonly height: number }, |
| 7 | ): SnapShotSource { |
| 8 | const accessibility = source.accessibility; |
| 9 | if ( |
| 10 | !imageSize || |
| 11 | accessibility?.format !== "element-tree" || |
| 12 | (imageSize.width === accessibility.imageSize.width && |
| 13 | imageSize.height === accessibility.imageSize.height) |
| 14 | ) |
| 15 | return source; |
| 16 | |
| 17 | const scaleX = imageSize.width / accessibility.imageSize.width; |
| 18 | const scaleY = imageSize.height / accessibility.imageSize.height; |
| 19 | const resizeNode = (node: SnapShotAccessibilityNode): SnapShotAccessibilityNode => { |
| 20 | let bounds = null; |
| 21 | if (node.bounds) { |
| 22 | const x = Math.min(imageSize.width, Math.round(node.bounds.x * scaleX)); |
| 23 | const y = Math.min(imageSize.height, Math.round(node.bounds.y * scaleY)); |
| 24 | const right = Math.min( |
| 25 | imageSize.width, |
| 26 | Math.round((node.bounds.x + node.bounds.width) * scaleX), |
| 27 | ); |
| 28 | const bottom = Math.min( |
| 29 | imageSize.height, |
| 30 | Math.round((node.bounds.y + node.bounds.height) * scaleY), |
| 31 | ); |
| 32 | if (right > x && bottom > y) bounds = { x, y, width: right - x, height: bottom - y }; |
| 33 | } |
| 34 | return { ...node, bounds, children: node.children.map(resizeNode) }; |
| 35 | }; |
| 36 | return { |
| 37 | ...source, |
| 38 | accessibility: { ...accessibility, imageSize, root: resizeNode(accessibility.root) }, |
| 39 | }; |
| 40 | } |