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comparison .cms/lib/codemirror/src/model/document_data.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 import { loadMode } from "../display/mode_state.js"
2 import { runInOp } from "../display/operations.js"
3 import { regChange } from "../display/view_tracking.js"
4 import { Line, updateLine } from "../line/line_data.js"
5 import { findMaxLine } from "../line/spans.js"
6 import { getLine } from "../line/utils_line.js"
7 import { estimateLineHeights } from "../measurement/position_measurement.js"
8 import { addClass, rmClass } from "../util/dom.js"
9 import { lst } from "../util/misc.js"
10 import { signalLater } from "../util/operation_group.js"
11
12 // DOCUMENT DATA STRUCTURE
13
14 // By default, updates that start and end at the beginning of a line
15 // are treated specially, in order to make the association of line
16 // widgets and marker elements with the text behave more intuitive.
17 export function isWholeLineUpdate(doc, change) {
18 return change.from.ch == 0 && change.to.ch == 0 && lst(change.text) == "" &&
19 (!doc.cm || doc.cm.options.wholeLineUpdateBefore)
20 }
21
22 // Perform a change on the document data structure.
23 export function updateDoc(doc, change, markedSpans, estimateHeight) {
24 function spansFor(n) {return markedSpans ? markedSpans[n] : null}
25 function update(line, text, spans) {
26 updateLine(line, text, spans, estimateHeight)
27 signalLater(line, "change", line, change)
28 }
29 function linesFor(start, end) {
30 let result = []
31 for (let i = start; i < end; ++i)
32 result.push(new Line(text[i], spansFor(i), estimateHeight))
33 return result
34 }
35
36 let from = change.from, to = change.to, text = change.text
37 let firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line)
38 let lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line
39
40 // Adjust the line structure
41 if (change.full) {
42 doc.insert(0, linesFor(0, text.length))
43 doc.remove(text.length, doc.size - text.length)
44 } else if (isWholeLineUpdate(doc, change)) {
45 // This is a whole-line replace. Treated specially to make
46 // sure line objects move the way they are supposed to.
47 let added = linesFor(0, text.length - 1)
48 update(lastLine, lastLine.text, lastSpans)
49 if (nlines) doc.remove(from.line, nlines)
50 if (added.length) doc.insert(from.line, added)
51 } else if (firstLine == lastLine) {
52 if (text.length == 1) {
53 update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans)
54 } else {
55 let added = linesFor(1, text.length - 1)
56 added.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight))
57 update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0))
58 doc.insert(from.line + 1, added)
59 }
60 } else if (text.length == 1) {
61 update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0))
62 doc.remove(from.line + 1, nlines)
63 } else {
64 update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0))
65 update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans)
66 let added = linesFor(1, text.length - 1)
67 if (nlines > 1) doc.remove(from.line + 1, nlines - 1)
68 doc.insert(from.line + 1, added)
69 }
70
71 signalLater(doc, "change", doc, change)
72 }
73
74 // Call f for all linked documents.
75 export function linkedDocs(doc, f, sharedHistOnly) {
76 function propagate(doc, skip, sharedHist) {
77 if (doc.linked) for (let i = 0; i < doc.linked.length; ++i) {
78 let rel = doc.linked[i]
79 if (rel.doc == skip) continue
80 let shared = sharedHist && rel.sharedHist
81 if (sharedHistOnly && !shared) continue
82 f(rel.doc, shared)
83 propagate(rel.doc, doc, shared)
84 }
85 }
86 propagate(doc, null, true)
87 }
88
89 // Attach a document to an editor.
90 export function attachDoc(cm, doc) {
91 if (doc.cm) throw new Error("This document is already in use.")
92 cm.doc = doc
93 doc.cm = cm
94 estimateLineHeights(cm)
95 loadMode(cm)
96 setDirectionClass(cm)
97 cm.options.direction = doc.direction
98 if (!cm.options.lineWrapping) findMaxLine(cm)
99 cm.options.mode = doc.modeOption
100 regChange(cm)
101 }
102
103 function setDirectionClass(cm) {
104 ;(cm.doc.direction == "rtl" ? addClass : rmClass)(cm.display.lineDiv, "CodeMirror-rtl")
105 }
106
107 export function directionChanged(cm) {
108 runInOp(cm, () => {
109 setDirectionClass(cm)
110 regChange(cm)
111 })
112 }