tldraw/state/commands/paste.ts

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import Command from './command'
import history from '../history'
import { Data, Shape } from 'types'
import {
getCommonBounds,
getPage,
getSelectedIds,
screenToWorld,
setSelectedIds,
setToArray,
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} from 'utils'
import { uniqueId } from 'utils'
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import vec from 'utils/vec'
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import { getShapeUtils } from 'state/shape-utils'
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import state from 'state/state'
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export default function pasteCommand(data: Data, initialShapes: Shape[]): void {
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const center = screenToWorld(
[window.innerWidth / 2, window.innerHeight / 2],
data
)
const bounds = getCommonBounds(
...initialShapes.map((shape) =>
getShapeUtils(shape).getRotatedBounds(shape)
)
)
const topLeft = vec.sub(center, [bounds.width / 2, bounds.height / 2])
const newIdMap = Object.fromEntries(
initialShapes.map((shape) => [shape.id, uniqueId()])
)
const oldSelectedIds = setToArray(getSelectedIds(data))
history.execute(
data,
new Command({
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name: 'paste_new_shapes',
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category: 'canvas',
manualSelection: true,
do(data) {
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const { shapes } = getPage(data)
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let childIndex =
(state.values.currentShapes[state.values.currentShapes.length - 1]
?.childIndex || 0) + 1
for (const shape of initialShapes) {
const topLeftOffset = vec.sub(shape.point, [bounds.minX, bounds.minY])
const newId = newIdMap[shape.id]
shapes[newId] = {
...shape,
id: newId,
parentId: oldSelectedIds[shape.parentId] || data.currentPageId,
childIndex: childIndex++,
point: vec.add(topLeft, topLeftOffset),
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isGenerated: false,
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}
}
setSelectedIds(data, Object.values(newIdMap))
},
undo(data) {
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const { shapes } = getPage(data)
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Object.values(newIdMap).forEach((id) => delete shapes[id])
setSelectedIds(data, oldSelectedIds)
},
})
)
}