monaco-editor-core
Version:
A browser based code editor
50 lines (49 loc) • 2.27 kB
JavaScript
/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import { BugIndicatingError } from '../../../../base/common/errors.js';
import { DisposableStore } from '../../../../base/common/lifecycle.js';
import { autorunOpts } from '../../../../base/common/observable.js';
import { Position } from '../../../common/core/position.js';
import { Range } from '../../../common/core/range.js';
const array = [];
export function getReadonlyEmptyArray() {
return array;
}
export class ColumnRange {
constructor(startColumn, endColumnExclusive) {
this.startColumn = startColumn;
this.endColumnExclusive = endColumnExclusive;
if (startColumn > endColumnExclusive) {
throw new BugIndicatingError(`startColumn ${startColumn} cannot be after endColumnExclusive ${endColumnExclusive}`);
}
}
toRange(lineNumber) {
return new Range(lineNumber, this.startColumn, lineNumber, this.endColumnExclusive);
}
equals(other) {
return this.startColumn === other.startColumn
&& this.endColumnExclusive === other.endColumnExclusive;
}
}
export function applyObservableDecorations(editor, decorations) {
const d = new DisposableStore();
const decorationsCollection = editor.createDecorationsCollection();
d.add(autorunOpts({ debugName: () => `Apply decorations from ${decorations.debugName}` }, reader => {
const d = decorations.read(reader);
decorationsCollection.set(d);
}));
d.add({
dispose: () => {
decorationsCollection.clear();
}
});
return d;
}
export function addPositions(pos1, pos2) {
return new Position(pos1.lineNumber + pos2.lineNumber - 1, pos2.lineNumber === 1 ? pos1.column + pos2.column - 1 : pos2.column);
}
export function subtractPositions(pos1, pos2) {
return new Position(pos1.lineNumber - pos2.lineNumber + 1, pos1.lineNumber - pos2.lineNumber === 0 ? pos1.column - pos2.column + 1 : pos1.column);
}