1 /* --------------------------------------------------------------------------------------------
2 * Copyright (c) Microsoft Corporation. All rights reserved.
3 * Licensed under the MIT License. See License.txt in the project root for license information.
4 * ------------------------------------------------------------------------------------------ */
6 var FullTextDocument = /** @class */ (function () {
7 function FullTextDocument(uri, languageId, version, content) {
9 this._languageId = languageId;
10 this._version = version;
11 this._content = content;
12 this._lineOffsets = undefined;
14 Object.defineProperty(FullTextDocument.prototype, "uri", {
21 Object.defineProperty(FullTextDocument.prototype, "languageId", {
23 return this._languageId;
28 Object.defineProperty(FullTextDocument.prototype, "version", {
35 FullTextDocument.prototype.getText = function (range) {
37 var start = this.offsetAt(range.start);
38 var end = this.offsetAt(range.end);
39 return this._content.substring(start, end);
43 FullTextDocument.prototype.update = function (changes, version) {
44 for (var _i = 0, changes_1 = changes; _i < changes_1.length; _i++) {
45 var change = changes_1[_i];
46 if (FullTextDocument.isIncremental(change)) {
47 // makes sure start is before end
48 var range = getWellformedRange(change.range);
50 var startOffset = this.offsetAt(range.start);
51 var endOffset = this.offsetAt(range.end);
52 this._content = this._content.substring(0, startOffset) + change.text + this._content.substring(endOffset, this._content.length);
54 var startLine = Math.max(range.start.line, 0);
55 var endLine = Math.max(range.end.line, 0);
56 var lineOffsets = this._lineOffsets;
57 var addedLineOffsets = computeLineOffsets(change.text, false, startOffset);
58 if (endLine - startLine === addedLineOffsets.length) {
59 for (var i = 0, len = addedLineOffsets.length; i < len; i++) {
60 lineOffsets[i + startLine + 1] = addedLineOffsets[i];
64 if (addedLineOffsets.length < 10000) {
65 lineOffsets.splice.apply(lineOffsets, [startLine + 1, endLine - startLine].concat(addedLineOffsets));
67 else { // avoid too many arguments for splice
68 this._lineOffsets = lineOffsets = lineOffsets.slice(0, startLine + 1).concat(addedLineOffsets, lineOffsets.slice(endLine + 1));
71 var diff = change.text.length - (endOffset - startOffset);
73 for (var i = startLine + 1 + addedLineOffsets.length, len = lineOffsets.length; i < len; i++) {
74 lineOffsets[i] = lineOffsets[i] + diff;
78 else if (FullTextDocument.isFull(change)) {
79 this._content = change.text;
80 this._lineOffsets = undefined;
83 throw new Error('Unknown change event received');
86 this._version = version;
88 FullTextDocument.prototype.getLineOffsets = function () {
89 if (this._lineOffsets === undefined) {
90 this._lineOffsets = computeLineOffsets(this._content, true);
92 return this._lineOffsets;
94 FullTextDocument.prototype.positionAt = function (offset) {
95 offset = Math.max(Math.min(offset, this._content.length), 0);
96 var lineOffsets = this.getLineOffsets();
97 var low = 0, high = lineOffsets.length;
99 return { line: 0, character: offset };
102 var mid = Math.floor((low + high) / 2);
103 if (lineOffsets[mid] > offset) {
110 // low is the least x for which the line offset is larger than the current offset
111 // or array.length if no line offset is larger than the current offset
113 return { line: line, character: offset - lineOffsets[line] };
115 FullTextDocument.prototype.offsetAt = function (position) {
116 var lineOffsets = this.getLineOffsets();
117 if (position.line >= lineOffsets.length) {
118 return this._content.length;
120 else if (position.line < 0) {
123 var lineOffset = lineOffsets[position.line];
124 var nextLineOffset = (position.line + 1 < lineOffsets.length) ? lineOffsets[position.line + 1] : this._content.length;
125 return Math.max(Math.min(lineOffset + position.character, nextLineOffset), lineOffset);
127 Object.defineProperty(FullTextDocument.prototype, "lineCount", {
129 return this.getLineOffsets().length;
134 FullTextDocument.isIncremental = function (event) {
135 var candidate = event;
136 return candidate !== undefined && candidate !== null &&
137 typeof candidate.text === 'string' && candidate.range !== undefined &&
138 (candidate.rangeLength === undefined || typeof candidate.rangeLength === 'number');
140 FullTextDocument.isFull = function (event) {
141 var candidate = event;
142 return candidate !== undefined && candidate !== null &&
143 typeof candidate.text === 'string' && candidate.range === undefined && candidate.rangeLength === undefined;
145 return FullTextDocument;
147 export var TextDocument;
148 (function (TextDocument) {
150 * Creates a new text document.
152 * @param uri The document's uri.
153 * @param languageId The document's language Id.
154 * @param version The document's initial version number.
155 * @param content The document's content.
157 function create(uri, languageId, version, content) {
158 return new FullTextDocument(uri, languageId, version, content);
160 TextDocument.create = create;
162 * Updates a TextDocument by modifing its content.
164 * @param document the document to update. Only documents created by TextDocument.create are valid inputs.
165 * @param changes the changes to apply to the document.
166 * @returns The updated TextDocument. Note: That's the same document instance passed in as first parameter.
169 function update(document, changes, version) {
170 if (document instanceof FullTextDocument) {
171 document.update(changes, version);
175 throw new Error('TextDocument.update: document must be created by TextDocument.create');
178 TextDocument.update = update;
179 function applyEdits(document, edits) {
180 var text = document.getText();
181 var sortedEdits = mergeSort(edits.map(getWellformedEdit), function (a, b) {
182 var diff = a.range.start.line - b.range.start.line;
184 return a.range.start.character - b.range.start.character;
188 var lastModifiedOffset = 0;
190 for (var _i = 0, sortedEdits_1 = sortedEdits; _i < sortedEdits_1.length; _i++) {
191 var e = sortedEdits_1[_i];
192 var startOffset = document.offsetAt(e.range.start);
193 if (startOffset < lastModifiedOffset) {
194 throw new Error('Overlapping edit');
196 else if (startOffset > lastModifiedOffset) {
197 spans.push(text.substring(lastModifiedOffset, startOffset));
199 if (e.newText.length) {
200 spans.push(e.newText);
202 lastModifiedOffset = document.offsetAt(e.range.end);
204 spans.push(text.substr(lastModifiedOffset));
205 return spans.join('');
207 TextDocument.applyEdits = applyEdits;
208 })(TextDocument || (TextDocument = {}));
209 function mergeSort(data, compare) {
210 if (data.length <= 1) {
214 var p = (data.length / 2) | 0;
215 var left = data.slice(0, p);
216 var right = data.slice(p);
217 mergeSort(left, compare);
218 mergeSort(right, compare);
222 while (leftIdx < left.length && rightIdx < right.length) {
223 var ret = compare(left[leftIdx], right[rightIdx]);
225 // smaller_equal -> take left to preserve order
226 data[i++] = left[leftIdx++];
229 // greater -> take right
230 data[i++] = right[rightIdx++];
233 while (leftIdx < left.length) {
234 data[i++] = left[leftIdx++];
236 while (rightIdx < right.length) {
237 data[i++] = right[rightIdx++];
241 function computeLineOffsets(text, isAtLineStart, textOffset) {
242 if (textOffset === void 0) { textOffset = 0; }
243 var result = isAtLineStart ? [textOffset] : [];
244 for (var i = 0; i < text.length; i++) {
245 var ch = text.charCodeAt(i);
246 if (ch === 13 /* CarriageReturn */ || ch === 10 /* LineFeed */) {
247 if (ch === 13 /* CarriageReturn */ && i + 1 < text.length && text.charCodeAt(i + 1) === 10 /* LineFeed */) {
250 result.push(textOffset + i + 1);
255 function getWellformedRange(range) {
256 var start = range.start;
258 if (start.line > end.line || (start.line === end.line && start.character > end.character)) {
259 return { start: end, end: start };
263 function getWellformedEdit(textEdit) {
264 var range = getWellformedRange(textEdit.range);
265 if (range !== textEdit.range) {
266 return { newText: textEdit.newText, range: range };