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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 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 | 1x 1x 1x 1x 1x 1x 163x 163x 163x 163x 163x 163x 161x 163x 23x 23x 7x 7x 6x 6x 7x 127x 88x 88x 39x 37x 37x 37x 35x 37x 37x 11x 127x 4x 3x 3x 1x 2x 131x 131x 17x 17x 7x 10x 10x 2x 2x 2x 2x 6x 10x 161x 161x 15x 161x 161x 54x | import { deleteSingleChar } from './deleteSingleChar'; import { isWhiteSpacePreserved } from '../../domUtils/isWhiteSpacePreserved'; import { mutateSegment } from '../common/mutate'; import { normalizeSingleSegment } from '../common/normalizeSegment'; import { normalizeText } from '../../domUtils/stringUtil'; import type { EntityRemovalOperation, FormatContentModelContext, ReadonlyContentModelParagraph, ReadonlyContentModelSegment, ShallowMutableContentModelSegment, } from 'roosterjs-content-model-types'; /** * Delete a content model segment from current selection * @param readonlyParagraph Parent paragraph of the segment to delete * @param readonlySegmentToDelete The segment to delete * @param context @optional Context object provided by formatContentModel API * @param direction @optional Whether this is deleting forward or backward. This is only used for deleting entity. * @param undeletableSegments @optional When passed, if this segment is undeletable, it will be added to this array instead of being deleted. * If not specified, only selected entity will be deleted */ export function deleteSegment( readonlyParagraph: ReadonlyContentModelParagraph, readonlySegmentToDelete: ReadonlyContentModelSegment, context?: FormatContentModelContext, direction?: 'forward' | 'backward', undeletableSegments?: ShallowMutableContentModelSegment[] ): boolean { const [paragraph, segmentToDelete, index] = mutateSegment( readonlyParagraph, readonlySegmentToDelete ); const segments = paragraph.segments; const preserveWhiteSpace = isWhiteSpacePreserved(paragraph.format.whiteSpace); const isForward = direction == 'forward'; const isBackward = direction == 'backward'; if (!preserveWhiteSpace) { normalizePreviousSegment(paragraph, segments, index); } switch (segmentToDelete?.segmentType) { case 'Br': case 'Image': case 'SelectionMarker': removeSegment(segments, index, direction, undeletableSegments); return true; case 'Entity': const operation: EntityRemovalOperation | undefined = segmentToDelete.isSelected ? 'overwrite' : isForward ? 'removeFromStart' : isBackward ? 'removeFromEnd' : undefined; if (operation !== undefined) { removeSegment(segments, index, direction, undeletableSegments); context?.deletedEntities.push({ entity: segmentToDelete, operation, }); } return true; case 'Text': if (segmentToDelete.text.length == 0 || segmentToDelete.isSelected) { segmentToDelete.text = ''; removeSegment(segments, index, direction, undeletableSegments); } else if (direction) { let text = segmentToDelete.text; text = deleteSingleChar(text, isForward); // isForward ? text.substring(1) : text.substring(0, text.length - 1); if (!preserveWhiteSpace) { text = normalizeText(text, isForward); } segmentToDelete.text = text; if (text == '') { removeSegment(segments, index, direction, undeletableSegments); } } return true; case 'General': if (segmentToDelete.isSelected) { removeSegment(segments, index, direction, undeletableSegments); return true; } else { return false; } default: return false; } } function removeSegment( segments: ShallowMutableContentModelSegment[], index: number, direction?: 'forward' | 'backward', undeletableSegments?: ShallowMutableContentModelSegment[] ) { const segment = segments.splice(index, 1)[0]; if (segment.link?.format.undeletable) { // Segment is not deletable, but at least we should unselect it delete segment.isSelected; if (undeletableSegments) { // For undeletable segments, if an undeletableSegments array is passed in, // put it into this array after we delete it, so caller knows that we have deleted some undeletable segments // and do proper handling undeletableSegments.push(segment); } else { // Otherwise, we need to reinsert it back to the segments array to keep the model consistent. // We need to find the right place to insert it back based on the direction of deletion let insertIndex: number; switch (direction) { case 'forward': insertIndex = index > 0 && segments[index - 1].segmentType == 'SelectionMarker' ? index - 1 : index; break; case 'backward': insertIndex = index < segments.length && segments[index].segmentType == 'SelectionMarker' ? index + 1 : index; break; default: insertIndex = index; } segments.splice(insertIndex, 0, segment); } } } function normalizePreviousSegment( paragraph: ReadonlyContentModelParagraph, segments: ReadonlyArray<ReadonlyContentModelSegment>, currentIndex: number ) { let index = currentIndex - 1; while (segments[index]?.segmentType == 'SelectionMarker') { index--; } const segment = segments[index]; if (segment) { normalizeSingleSegment(paragraph, segment); } } |