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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | 1x 1x 1x 64x 66x 90x 45x 45x 45x 45x 45x 45x 45x 45x 45x 17x 28x 27x 45x 45x 45x | import { preserveParagraphFormat } from './preserveParagraphFormat'; import { copyFormat, createBr, createParagraph, normalizeParagraph, ParagraphFormats, setParagraphNotImplicit, } from 'roosterjs-content-model-dom'; import type { InsertPoint, ShallowMutableContentModelParagraph, } from 'roosterjs-content-model-types'; /** * @internal * Split the given paragraph from insert point into two paragraphs, * and move the selection marker to the beginning of the second paragraph * @param insertPoint The input insert point which includes the paragraph and selection marker * @param removeImplicitParagraph Whether to remove the implicit paragraph if it becomes empty after split * * If set to false, the implicit paragraph will be preserved even if it becomes empty * * If set to true, the implicit paragraph will be removed if it becomes empty * @returns The new paragraph it created */ export function splitParagraph( insertPoint: InsertPoint, removeImplicitParagraph: boolean = true, formatsToPreserveOnMerge: string[] = [] ): ShallowMutableContentModelParagraph { const { paragraph, marker } = insertPoint; const newParagraph: ShallowMutableContentModelParagraph = createParagraph( false /*isImplicit*/, {}, paragraph.segmentFormat ); copyFormat(newParagraph.format, paragraph.format, ParagraphFormats); preserveParagraphFormat(formatsToPreserveOnMerge, paragraph, newParagraph); const markerIndex = paragraph.segments.indexOf(marker); const segments = paragraph.segments.splice( markerIndex, paragraph.segments.length - markerIndex ); newParagraph.segments.push(...segments); const isEmptyParagraph = paragraph.segments.length == 0; const shouldPreserveImplicitParagraph = !paragraph.isImplicit || !removeImplicitParagraph; if (isEmptyParagraph && shouldPreserveImplicitParagraph) { paragraph.segments.push(createBr(marker.format)); } else if (!isEmptyParagraph) { setParagraphNotImplicit(paragraph); } insertPoint.paragraph = newParagraph; normalizeParagraph(paragraph); return newParagraph; } |