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comparison .cms/lib/codemirror/src/line/pos.js @ 0:78edf6b517a0 draft

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24.10
author Coffee CMS <info@coffee-cms.ru>
date Fri, 11 Oct 2024 22:40:23 +0000
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-1:000000000000 0:78edf6b517a0
1 import { getLine } from "./utils_line.js"
2
3 // A Pos instance represents a position within the text.
4 export function Pos(line, ch, sticky = null) {
5 if (!(this instanceof Pos)) return new Pos(line, ch, sticky)
6 this.line = line
7 this.ch = ch
8 this.sticky = sticky
9 }
10
11 // Compare two positions, return 0 if they are the same, a negative
12 // number when a is less, and a positive number otherwise.
13 export function cmp(a, b) { return a.line - b.line || a.ch - b.ch }
14
15 export function equalCursorPos(a, b) { return a.sticky == b.sticky && cmp(a, b) == 0 }
16
17 export function copyPos(x) {return Pos(x.line, x.ch)}
18 export function maxPos(a, b) { return cmp(a, b) < 0 ? b : a }
19 export function minPos(a, b) { return cmp(a, b) < 0 ? a : b }
20
21 // Most of the external API clips given positions to make sure they
22 // actually exist within the document.
23 export function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1))}
24 export function clipPos(doc, pos) {
25 if (pos.line < doc.first) return Pos(doc.first, 0)
26 let last = doc.first + doc.size - 1
27 if (pos.line > last) return Pos(last, getLine(doc, last).text.length)
28 return clipToLen(pos, getLine(doc, pos.line).text.length)
29 }
30 function clipToLen(pos, linelen) {
31 let ch = pos.ch
32 if (ch == null || ch > linelen) return Pos(pos.line, linelen)
33 else if (ch < 0) return Pos(pos.line, 0)
34 else return pos
35 }
36 export function clipPosArray(doc, array) {
37 let out = []
38 for (let i = 0; i < array.length; i++) out[i] = clipPos(doc, array[i])
39 return out
40 }