mirror of
https://github.com/mauriceboe/TREK.git
synced 2026-10-23 07:26:30 +00:00
Maurice
41 lines
1.7 KiB
TypeScript
41 lines
1.7 KiB
TypeScript
import type { BookElement, BookPageSetup, BookSpread } from '@trek/shared'
|
|
import { bookElementId as elementId } from '@trek/shared'
|
|
|
|
/**
|
|
* What was copied, and from where (#2316).
|
|
*
|
|
* The elements as they stood, in the millimetres of the spread they came from.
|
|
* The source spread's id is kept so a paste back onto the same page can step
|
|
* the copy aside rather than drop it exactly over the original.
|
|
*/
|
|
export interface StudioClipboard {
|
|
fromSpreadId: string
|
|
elements: BookElement[]
|
|
}
|
|
|
|
/** How far a paste onto its own page is stepped aside, the same step Duplicate takes. */
|
|
const OFFSET = 4
|
|
|
|
const spreadWidth = (spread: BookSpread, page: BookPageSetup) =>
|
|
page.pageWidth * (spread.role === 'inner' ? 2 : 1)
|
|
|
|
/**
|
|
* The clipboard's elements, ready to go onto `target`.
|
|
*
|
|
* Fresh ids every time, because the book is edited by several people at once
|
|
* and two elements sharing an id would merge into one on the next save. An
|
|
* element copied from a double spread onto a single page is pulled back inside
|
|
* it: its place on the right-hand page would otherwise be off the paper.
|
|
*/
|
|
export function pastedElements(clip: StudioClipboard, target: BookSpread, page: BookPageSetup): BookElement[] {
|
|
const width = spreadWidth(target, page)
|
|
const step = clip.fromSpreadId === target.id ? OFFSET : 0
|
|
return clip.elements.map(el => {
|
|
const w = Math.min(el.frame.w, width)
|
|
const h = Math.min(el.frame.h, page.pageHeight)
|
|
const x = Math.min(Math.max(el.frame.x + step, 0), width - w)
|
|
const y = Math.min(Math.max(el.frame.y + step, 0), page.pageHeight - h)
|
|
return { ...el, id: elementId(el.kind[0]), locked: false, frame: { x, y, w, h } } as BookElement
|
|
})
|
|
}
|