Mercurial
diff .cms/lib/codemirror/src/line/pos.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/line/pos.js Fri Oct 11 22:40:23 2024 +0000 @@ -0,0 +1,40 @@ +import { getLine } from "./utils_line.js" + +// A Pos instance represents a position within the text. +export function Pos(line, ch, sticky = null) { + if (!(this instanceof Pos)) return new Pos(line, ch, sticky) + this.line = line + this.ch = ch + this.sticky = sticky +} + +// Compare two positions, return 0 if they are the same, a negative +// number when a is less, and a positive number otherwise. +export function cmp(a, b) { return a.line - b.line || a.ch - b.ch } + +export function equalCursorPos(a, b) { return a.sticky == b.sticky && cmp(a, b) == 0 } + +export function copyPos(x) {return Pos(x.line, x.ch)} +export function maxPos(a, b) { return cmp(a, b) < 0 ? b : a } +export function minPos(a, b) { return cmp(a, b) < 0 ? a : b } + +// Most of the external API clips given positions to make sure they +// actually exist within the document. +export function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1))} +export function clipPos(doc, pos) { + if (pos.line < doc.first) return Pos(doc.first, 0) + let last = doc.first + doc.size - 1 + if (pos.line > last) return Pos(last, getLine(doc, last).text.length) + return clipToLen(pos, getLine(doc, pos.line).text.length) +} +function clipToLen(pos, linelen) { + let ch = pos.ch + if (ch == null || ch > linelen) return Pos(pos.line, linelen) + else if (ch < 0) return Pos(pos.line, 0) + else return pos +} +export function clipPosArray(doc, array) { + let out = [] + for (let i = 0; i < array.length; i++) out[i] = clipPos(doc, array[i]) + return out +}