rtl-reverse-scroller.js 3.4 KB

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  1. /**
  2. * @license
  3. * Copyright 2018 Google Inc.
  4. *
  5. * Permission is hereby granted, free of charge, to any person obtaining a copy
  6. * of this software and associated documentation files (the "Software"), to deal
  7. * in the Software without restriction, including without limitation the rights
  8. * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  9. * copies of the Software, and to permit persons to whom the Software is
  10. * furnished to do so, subject to the following conditions:
  11. *
  12. * The above copyright notice and this permission notice shall be included in
  13. * all copies or substantial portions of the Software.
  14. *
  15. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16. * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17. * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18. * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19. * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20. * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  21. * THE SOFTWARE.
  22. */
  23. import { __extends } from "tslib";
  24. import { MDCTabScrollerRTL } from './rtl-scroller';
  25. /** MDC Tab Scroller RTL Reverse */
  26. var MDCTabScrollerRTLReverse = /** @class */ (function (_super) {
  27. __extends(MDCTabScrollerRTLReverse, _super);
  28. function MDCTabScrollerRTLReverse() {
  29. return _super !== null && _super.apply(this, arguments) || this;
  30. }
  31. MDCTabScrollerRTLReverse.prototype.getScrollPositionRTL = function (translateX) {
  32. var currentScrollLeft = this.adapter.getScrollAreaScrollLeft();
  33. // Scroll values on most browsers are ints instead of floats so we round
  34. return Math.round(currentScrollLeft - translateX);
  35. };
  36. MDCTabScrollerRTLReverse.prototype.scrollToRTL = function (scrollX) {
  37. var currentScrollLeft = this.adapter.getScrollAreaScrollLeft();
  38. var clampedScrollLeft = this.clampScrollValue(scrollX);
  39. return {
  40. finalScrollPosition: clampedScrollLeft,
  41. scrollDelta: currentScrollLeft - clampedScrollLeft,
  42. };
  43. };
  44. MDCTabScrollerRTLReverse.prototype.incrementScrollRTL = function (scrollX) {
  45. var currentScrollLeft = this.adapter.getScrollAreaScrollLeft();
  46. var clampedScrollLeft = this.clampScrollValue(currentScrollLeft + scrollX);
  47. return {
  48. finalScrollPosition: clampedScrollLeft,
  49. scrollDelta: currentScrollLeft - clampedScrollLeft,
  50. };
  51. };
  52. MDCTabScrollerRTLReverse.prototype.getAnimatingScrollPosition = function (scrollX, translateX) {
  53. return scrollX + translateX;
  54. };
  55. MDCTabScrollerRTLReverse.prototype.calculateScrollEdges = function () {
  56. var contentWidth = this.adapter.getScrollContentOffsetWidth();
  57. var rootWidth = this.adapter.getScrollAreaOffsetWidth();
  58. return {
  59. left: contentWidth - rootWidth,
  60. right: 0,
  61. };
  62. };
  63. MDCTabScrollerRTLReverse.prototype.clampScrollValue = function (scrollX) {
  64. var edges = this.calculateScrollEdges();
  65. return Math.min(Math.max(edges.right, scrollX), edges.left);
  66. };
  67. return MDCTabScrollerRTLReverse;
  68. }(MDCTabScrollerRTL));
  69. export { MDCTabScrollerRTLReverse };
  70. // tslint:disable-next-line:no-default-export Needed for backward compatibility with MDC Web v0.44.0 and earlier.
  71. export default MDCTabScrollerRTLReverse;
  72. //# sourceMappingURL=rtl-reverse-scroller.js.map