Mercurial
diff .cms/lib/codemirror/src/edit/deleteNearSelection.js @ 0:78edf6b517a0 draft
24.10
author | Coffee CMS <info@coffee-cms.ru> |
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date | Fri, 11 Oct 2024 22:40:23 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/.cms/lib/codemirror/src/edit/deleteNearSelection.js Fri Oct 11 22:40:23 2024 +0000 @@ -0,0 +1,30 @@ +import { runInOp } from "../display/operations.js" +import { ensureCursorVisible } from "../display/scrolling.js" +import { cmp } from "../line/pos.js" +import { replaceRange } from "../model/changes.js" +import { lst } from "../util/misc.js" + +// Helper for deleting text near the selection(s), used to implement +// backspace, delete, and similar functionality. +export function deleteNearSelection(cm, compute) { + let ranges = cm.doc.sel.ranges, kill = [] + // Build up a set of ranges to kill first, merging overlapping + // ranges. + for (let i = 0; i < ranges.length; i++) { + let toKill = compute(ranges[i]) + while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) { + let replaced = kill.pop() + if (cmp(replaced.from, toKill.from) < 0) { + toKill.from = replaced.from + break + } + } + kill.push(toKill) + } + // Next, remove those actual ranges. + runInOp(cm, () => { + for (let i = kill.length - 1; i >= 0; i--) + replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete") + ensureCursorVisible(cm) + }) +}