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Update replace_step.js #19

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Update replace_step.js #19

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61287ac
Update replace_step.js
jindw Oct 22, 2021
7a01562
Update replace_step.js
jindw Oct 25, 2021
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4 changes: 3 additions & 1 deletion src/replace_step.js
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Original file line number Diff line number Diff line change
Expand Up @@ -141,7 +141,9 @@ export class ReplaceAroundStep extends Step {
map(mapping) {
let from = mapping.mapResult(this.from, 1), to = mapping.mapResult(this.to, -1)
let gapFrom = mapping.map(this.gapFrom, -1), gapTo = mapping.map(this.gapTo, 1)
if ((from.deleted && to.deleted) || gapFrom < from.pos || gapTo > to.pos) return null
//gapFrom and gapTo must be inside the ranges of [from,to]
gapFrom = Math.max(from.pos,gapFrom), gapTo = Math.min(to.pos,gapTo);
if ((from.deleted && to.deleted) return null
return new ReplaceAroundStep(from.pos, to.pos, gapFrom, gapTo, this.slice, this.insert, this.structure)
}

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