83 lines
2.7 KiB
JavaScript
83 lines
2.7 KiB
JavaScript
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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/**
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* A directive which allows elements to be manually scrolled, and for their
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* scroll state to be observed.
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*/
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angular.module('element').directive('guacScroll', [function guacScroll() {
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return {
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restrict: 'A',
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link: function linkGuacScroll($scope, $element, $attrs) {
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/**
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* The current scroll state of the element.
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*
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* @type ScrollState
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*/
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var guacScroll = $scope.$eval($attrs.guacScroll);
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/**
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* The element which is being scrolled, or monitored for changes
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* in scroll.
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*
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* @type Element
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*/
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var element = $element[0];
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/**
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* Returns the current left edge of the scrolling rectangle.
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*
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* @returns {Number}
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* The current left edge of the scrolling rectangle.
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*/
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var getScrollLeft = function getScrollLeft() {
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return guacScroll.left;
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};
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/**
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* Returns the current top edge of the scrolling rectangle.
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*
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* @returns {Number}
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* The current top edge of the scrolling rectangle.
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*/
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var getScrollTop = function getScrollTop() {
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return guacScroll.top;
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};
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// Update underlying scrollLeft property when left changes
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$scope.$watch(getScrollLeft, function scrollLeftChanged(left) {
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element.scrollLeft = left;
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guacScroll.left = element.scrollLeft;
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});
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// Update underlying scrollTop property when top changes
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$scope.$watch(getScrollTop, function scrollTopChanged(top) {
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element.scrollTop = top;
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guacScroll.top = element.scrollTop;
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});
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} // end guacScroll link function
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};
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}]);
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