31 lines
1.0 KiB
JavaScript
31 lines
1.0 KiB
JavaScript
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import { runInOp } from "../display/operations.js"
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import { ensureCursorVisible } from "../display/scrolling.js"
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import { cmp } from "../line/pos.js"
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import { replaceRange } from "../model/changes.js"
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import { lst } from "../util/misc.js"
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// Helper for deleting text near the selection(s), used to implement
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// backspace, delete, and similar functionality.
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export function deleteNearSelection(cm, compute) {
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let ranges = cm.doc.sel.ranges, kill = []
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// Build up a set of ranges to kill first, merging overlapping
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// ranges.
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for (let i = 0; i < ranges.length; i++) {
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let toKill = compute(ranges[i])
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while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) {
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let replaced = kill.pop()
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if (cmp(replaced.from, toKill.from) < 0) {
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toKill.from = replaced.from
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break
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}
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}
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kill.push(toKill)
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}
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// Next, remove those actual ranges.
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runInOp(cm, () => {
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for (let i = kill.length - 1; i >= 0; i--)
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replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete")
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ensureCursorVisible(cm)
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})
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}
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