/**
 * Copyright 2017 Matt Acosta
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { Encoding } from './Encoding';
import { ISourceText } from './ISourceText';
import { ISourceTextContainer } from './ISourceTextContainer';
import { TextChange } from './TextChange';
import { TextSpan } from './TextSpan';
/**
 * Provides a base class for objects that contain source code.
 */
export declare abstract class SourceTextBase implements ISourceText, ISourceTextContainer {
    /**
     * @inheritDoc
     */
    abstract readonly encoding: Encoding;
    /**
     * @inheritDoc
     */
    abstract readonly length: number;
    /**
     * @inheritDoc
     */
    abstract readonly sourceKey: ISourceText;
    /**
     * @inheritDoc
     */
    abstract readonly sourceLength: number;
    /**
     * @inheritDoc
     */
    abstract readonly sources: ReadonlyArray<ISourceText>;
    /**
     * @inheritDoc
     */
    abstract charCodeAt(offset: number): number;
    /**
     * @inheritDoc
     */
    equals(value: ISourceText): boolean;
    /**
     * @inheritDoc
     */
    abstract slice(position: TextSpan | number): ISourceText;
    /**
     * @inheritDoc
     */
    abstract substring(start: number, length?: number): string;
    /**
     * @inheritDoc
     */
    withChanges(changes: Iterable<TextChange>): ISourceText;
    /**
     * @inheritDoc
     */
    abstract withEncoding(encoding: Encoding): ISourceText;
    /**
     * Determines if the given span is within the source text.
     *
     * @param {TextSpan} span
     *   The span being checked.
     */
    protected isSpanInText(span: TextSpan): boolean;
}