Mercurial
comparison .cms/lib/codemirror/src/model/change_measurement.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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| children |
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| -1:000000000000 | 0:78edf6b517a0 |
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| 1 import { cmp, Pos } from "../line/pos.js" | |
| 2 import { lst } from "../util/misc.js" | |
| 3 | |
| 4 import { normalizeSelection, Range, Selection } from "./selection.js" | |
| 5 | |
| 6 // Compute the position of the end of a change (its 'to' property | |
| 7 // refers to the pre-change end). | |
| 8 export function changeEnd(change) { | |
| 9 if (!change.text) return change.to | |
| 10 return Pos(change.from.line + change.text.length - 1, | |
| 11 lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0)) | |
| 12 } | |
| 13 | |
| 14 // Adjust a position to refer to the post-change position of the | |
| 15 // same text, or the end of the change if the change covers it. | |
| 16 function adjustForChange(pos, change) { | |
| 17 if (cmp(pos, change.from) < 0) return pos | |
| 18 if (cmp(pos, change.to) <= 0) return changeEnd(change) | |
| 19 | |
| 20 let line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch | |
| 21 if (pos.line == change.to.line) ch += changeEnd(change).ch - change.to.ch | |
| 22 return Pos(line, ch) | |
| 23 } | |
| 24 | |
| 25 export function computeSelAfterChange(doc, change) { | |
| 26 let out = [] | |
| 27 for (let i = 0; i < doc.sel.ranges.length; i++) { | |
| 28 let range = doc.sel.ranges[i] | |
| 29 out.push(new Range(adjustForChange(range.anchor, change), | |
| 30 adjustForChange(range.head, change))) | |
| 31 } | |
| 32 return normalizeSelection(doc.cm, out, doc.sel.primIndex) | |
| 33 } | |
| 34 | |
| 35 function offsetPos(pos, old, nw) { | |
| 36 if (pos.line == old.line) | |
| 37 return Pos(nw.line, pos.ch - old.ch + nw.ch) | |
| 38 else | |
| 39 return Pos(nw.line + (pos.line - old.line), pos.ch) | |
| 40 } | |
| 41 | |
| 42 // Used by replaceSelections to allow moving the selection to the | |
| 43 // start or around the replaced test. Hint may be "start" or "around". | |
| 44 export function computeReplacedSel(doc, changes, hint) { | |
| 45 let out = [] | |
| 46 let oldPrev = Pos(doc.first, 0), newPrev = oldPrev | |
| 47 for (let i = 0; i < changes.length; i++) { | |
| 48 let change = changes[i] | |
| 49 let from = offsetPos(change.from, oldPrev, newPrev) | |
| 50 let to = offsetPos(changeEnd(change), oldPrev, newPrev) | |
| 51 oldPrev = change.to | |
| 52 newPrev = to | |
| 53 if (hint == "around") { | |
| 54 let range = doc.sel.ranges[i], inv = cmp(range.head, range.anchor) < 0 | |
| 55 out[i] = new Range(inv ? to : from, inv ? from : to) | |
| 56 } else { | |
| 57 out[i] = new Range(from, from) | |
| 58 } | |
| 59 } | |
| 60 return new Selection(out, doc.sel.primIndex) | |
| 61 } |