44 lines
1.1 KiB
TypeScript
44 lines
1.1 KiB
TypeScript
import {
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AnyOperation,
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Change,
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CommentOperation,
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DeleteOperation,
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EditOperation,
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InsertOperation,
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Operation,
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} from '../../../types/change'
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export const isInsertOperation = (op: Operation): op is InsertOperation =>
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'i' in op
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export const isCommentOperation = (op: Operation): op is CommentOperation =>
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'c' in op
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export const isDeleteOperation = (op: Operation): op is DeleteOperation =>
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'd' in op
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export const isEditOperation = (op: Operation): op is EditOperation =>
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isInsertOperation(op) || isDeleteOperation(op)
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export const isInsertChange = (
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change: Change<EditOperation>
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): change is Change<InsertOperation> => isInsertOperation(change.op)
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export const isCommentChange = (
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change: Change<CommentOperation>
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): change is Change<CommentOperation> => isCommentOperation(change.op)
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export const isDeleteChange = (
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change: Change<EditOperation>
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): change is Change<DeleteOperation> => isDeleteOperation(change.op)
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export const visibleTextLength = (op: AnyOperation) => {
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if (isCommentOperation(op)) {
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return op.c.length
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}
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if (isInsertOperation(op)) {
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return op.i.length
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}
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return 0
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}
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