react-native-devtools-frontend/front_end/common/ContentProvider.js

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/**
 * @interface
 */
Common.ContentProvider = function() {};

Common.ContentProvider.prototype = {
  /**
   * @return {string}
   */
  contentURL() {},

  /**
   * @return {!Common.ResourceType}
   */
  contentType() {},

  /**
   * @return {!Promise<boolean>}
   */
  contentEncoded() {},

  /**
   * @return {!Promise<?string>}
   */
  requestContent() {},

  /**
   * @param {string} query
   * @param {boolean} caseSensitive
   * @param {boolean} isRegex
   * @return {!Promise<!Array<!Common.ContentProvider.SearchMatch>>}
   */
  searchInContent(query, caseSensitive, isRegex) {}
};

/**
 * @unrestricted
 */
Common.ContentProvider.SearchMatch = class {
  /**
   * @param {number} lineNumber
   * @param {string} lineContent
   */
  constructor(lineNumber, lineContent) {
    this.lineNumber = lineNumber;
    this.lineContent = lineContent;
  }
};

/**
 * @param {string} content
 * @param {string} query
 * @param {boolean} caseSensitive
 * @param {boolean} isRegex
 * @return {!Array.<!Common.ContentProvider.SearchMatch>}
 */
Common.ContentProvider.performSearchInContent = function(content, query, caseSensitive, isRegex) {
  const regex = createSearchRegex(query, caseSensitive, isRegex);

  const text = new TextUtils.Text(content);
  const result = [];
  for (let i = 0; i < text.lineCount(); ++i) {
    const lineContent = text.lineAt(i);
    regex.lastIndex = 0;
    if (regex.exec(lineContent))
      result.push(new Common.ContentProvider.SearchMatch(i, lineContent));
  }
  return result;
};

/**
 * @param {?string} content
 * @param {string} mimeType
 * @param {boolean} contentEncoded
 * @param {?string=} charset
 * @return {?string}
 */
Common.ContentProvider.contentAsDataURL = function(content, mimeType, contentEncoded, charset) {
  const maxDataUrlSize = 1024 * 1024;
  if (content === null || content.length > maxDataUrlSize)
    return null;

  return 'data:' + mimeType + (charset ? ';charset=' + charset : '') + (contentEncoded ? ';base64' : '') + ',' +
      content;
};