search_highlight.js 3.2 KB

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  1. /* ***** BEGIN LICENSE BLOCK *****
  2. * Distributed under the BSD license:
  3. *
  4. * Copyright (c) 2010, Ajax.org B.V.
  5. * All rights reserved.
  6. *
  7. * Redistribution and use in source and binary forms, with or without
  8. * modification, are permitted provided that the following conditions are met:
  9. * * Redistributions of source code must retain the above copyright
  10. * notice, this list of conditions and the following disclaimer.
  11. * * Redistributions in binary form must reproduce the above copyright
  12. * notice, this list of conditions and the following disclaimer in the
  13. * documentation and/or other materials provided with the distribution.
  14. * * Neither the name of Ajax.org B.V. nor the
  15. * names of its contributors may be used to endorse or promote products
  16. * derived from this software without specific prior written permission.
  17. *
  18. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  19. * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  20. * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  21. * DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
  22. * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  23. * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  24. * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  25. * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26. * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  27. * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28. *
  29. * ***** END LICENSE BLOCK ***** */
  30. define(function(require, exports, module) {
  31. "use strict";
  32. var lang = require("./lib/lang");
  33. var oop = require("./lib/oop");
  34. var Range = require("./range").Range;
  35. var SearchHighlight = function(regExp, clazz, type) {
  36. this.setRegexp(regExp);
  37. this.clazz = clazz;
  38. this.type = type || "text";
  39. };
  40. (function() {
  41. // needed to prevent long lines from freezing the browser
  42. this.MAX_RANGES = 500;
  43. this.setRegexp = function(regExp) {
  44. if (this.regExp+"" == regExp+"")
  45. return;
  46. this.regExp = regExp;
  47. this.cache = [];
  48. };
  49. this.update = function(html, markerLayer, session, config) {
  50. if (!this.regExp)
  51. return;
  52. var start = config.firstRow, end = config.lastRow;
  53. for (var i = start; i <= end; i++) {
  54. var ranges = this.cache[i];
  55. if (ranges == null) {
  56. ranges = lang.getMatchOffsets(session.getLine(i), this.regExp);
  57. if (ranges.length > this.MAX_RANGES)
  58. ranges = ranges.slice(0, this.MAX_RANGES);
  59. ranges = ranges.map(function(match) {
  60. return new Range(i, match.offset, i, match.offset + match.length);
  61. });
  62. this.cache[i] = ranges.length ? ranges : "";
  63. }
  64. for (var j = ranges.length; j --; ) {
  65. markerLayer.drawSingleLineMarker(
  66. html, ranges[j].toScreenRange(session), this.clazz, config);
  67. }
  68. }
  69. };
  70. }).call(SearchHighlight.prototype);
  71. exports.SearchHighlight = SearchHighlight;
  72. });