[23972] | 1 | /*
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| 2 | Copyright (c) 2006 Yahoo! Inc. All rights reserved.
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| 3 | version 0.9.0
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| 4 | */
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| 5 |
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| 6 | /**
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| 7 | * @class Provides helper methods for DOM elements.
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| 8 | */
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| 9 | YAHOO.util.Dom = new function() {
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| 10 |
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| 11 | /**
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| 12 | * Returns an HTMLElement reference
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| 13 | * @param {String | HTMLElement} Accepts either a string to use as an ID for getting a DOM reference, or an actual DOM reference.
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| 14 | * @return {HTMLElement} A DOM reference to an HTML element.
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| 15 | */
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| 16 | this.get = function(el) {
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| 17 | if (typeof el == 'string') { // accept object or id
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| 18 | el = document.getElementById(el);
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| 19 | }
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| 20 |
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| 21 | return el;
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| 22 | };
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| 23 |
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| 24 | /**
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| 25 | * Normalizes currentStyle and ComputedStyle.
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| 26 | * @param {String | HTMLElement} Accepts either a string to use as an ID for getting a DOM reference, or an actual DOM reference.
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| 27 | * @param {String} property The style property whose value is returned.
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| 28 | * @return {String} The current value of the style property.
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| 29 | */
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| 30 | this.getStyle = function(el, property) {
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| 31 | var value = null;
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| 32 | var dv = document.defaultView;
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| 33 |
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| 34 | el = this.get(el);
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| 35 |
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| 36 | if (property == 'opacity' && el.filters) {// IE opacity
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| 37 | value = 1;
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| 38 | try {
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| 39 | value = el.filters.item('DXImageTransform.Microsoft.Alpha').opacity / 100;
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| 40 | } catch(e) {
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| 41 | try {
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| 42 | value = el.filters.item('alpha').opacity / 100;
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| 43 | } catch(e) {}
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| 44 | }
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| 45 | }
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| 46 | else if (el.style[property]) {
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| 47 | value = el.style[property];
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| 48 | }
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| 49 | else if (el.currentStyle && el.currentStyle[property]) {
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| 50 | value = el.currentStyle[property];
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| 51 | }
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| 52 | else if ( dv && dv.getComputedStyle )
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| 53 | { // convert camelCase to hyphen-case
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| 54 |
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| 55 | var converted = '';
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| 56 | for(i = 0, len = property.length;i < len; ++i) {
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| 57 | if (property.charAt(i) == property.charAt(i).toUpperCase()) {
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| 58 | converted = converted + '-' + property.charAt(i).toLowerCase();
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| 59 | } else {
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| 60 | converted = converted + property.charAt(i);
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| 61 | }
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| 62 | }
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| 63 |
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| 64 | if (dv.getComputedStyle(el, '').getPropertyValue(converted)) {
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| 65 | value = dv.getComputedStyle(el, '').getPropertyValue(converted);
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| 66 | }
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| 67 | }
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| 68 |
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| 69 | return value;
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| 70 | };
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| 71 |
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| 72 | /**
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| 73 | * Wrapper for setting style properties of HTMLElements. Normalizes "opacity" across modern browsers.
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| 74 | * @param {String | HTMLElement} Accepts either a string to use as an ID for getting a DOM reference, or an actual DOM reference.
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| 75 | * @param {String} property The style property to be set.
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| 76 | * @param {String} val The value to apply to the given property.
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| 77 | */
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| 78 | this.setStyle = function(el, property, val) {
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| 79 | el = this.get(el);
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| 80 | switch(property) {
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| 81 | case 'opacity' :
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| 82 | if (el.filters) {
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| 83 | el.style.filter = 'alpha(opacity=' + val * 100 + ')';
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| 84 |
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| 85 | if (!el.currentStyle.hasLayout) {
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| 86 | el.style.zoom = 1;
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| 87 | }
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| 88 | } else {
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| 89 | el.style.opacity = val;
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| 90 | el.style['-moz-opacity'] = val;
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| 91 | el.style['-khtml-opacity'] = val;
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| 92 | }
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| 93 | break;
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| 94 | default :
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| 95 | el.style[property] = val;
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| 96 | }
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| 97 | };
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| 98 |
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| 99 | /**
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| 100 | * Gets the current position of an element based on page coordinates. Element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
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| 101 | * @param {String | HTMLElement} Accepts either a string to use as an ID for getting a DOM reference, or an actual DOM reference.
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| 102 | */
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| 103 | this.getXY = function(el) {
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| 104 | el = this.get(el);
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| 105 |
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| 106 | // has to be part of document to have pageXY
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| 107 | if (el.parentNode === null || this.getStyle(el, 'display') == 'none') {
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| 108 | return false;
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| 109 | }
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| 110 |
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| 111 | /**
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| 112 | * Position of the html element (x, y)
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| 113 | * @private
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| 114 | * @type Array
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| 115 | */
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| 116 | var parent = null;
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| 117 | var pos = [];
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| 118 | var box;
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| 119 |
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| 120 | if (el.getBoundingClientRect) { // IE
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| 121 | box = el.getBoundingClientRect();
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| 122 | var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;
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| 123 | var scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft;
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| 124 |
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| 125 | return [box.left + scrollLeft, box.top + scrollTop];
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| 126 | }
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| 127 | else if (document.getBoxObjectFor) { // gecko
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| 128 | box = document.getBoxObjectFor(el);
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| 129 | pos = [box.x, box.y];
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| 130 | }
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| 131 | else { // safari/opera
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| 132 | pos = [el.offsetLeft, el.offsetTop];
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| 133 | parent = el.offsetParent;
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| 134 | if (parent != el) {
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| 135 | while (parent) {
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| 136 | pos[0] += parent.offsetLeft;
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| 137 | pos[1] += parent.offsetTop;
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| 138 | parent = parent.offsetParent;
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| 139 | }
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| 140 | }
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| 141 |
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| 142 | // opera & (safari absolute) incorrectly account for body offsetTop
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| 143 | var ua = navigator.userAgent.toLowerCase();
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| 144 | if (
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| 145 | ua.indexOf('opera') != -1
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| 146 | || ( ua.indexOf('safari') != -1 && this.getStyle(el, 'position') == 'absolute' )
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| 147 | ) {
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| 148 | pos[1] -= document.body.offsetTop;
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| 149 | }
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| 150 | }
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| 151 |
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| 152 | if (el.parentNode) { parent = el.parentNode; }
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| 153 | else { parent = null; }
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| 154 |
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| 155 | while (parent && parent.tagName != 'BODY' && parent.tagName != 'HTML') {
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| 156 | pos[0] -= parent.scrollLeft;
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| 157 | pos[1] -= parent.scrollTop;
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| 158 |
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| 159 | if (parent.parentNode) { parent = parent.parentNode; }
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| 160 | else { parent = null; }
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| 161 | }
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| 162 |
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| 163 | return pos;
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| 164 | };
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| 165 |
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| 166 | /**
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| 167 | * Gets the current X position of an element based on page coordinates. The element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
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| 168 | * @param {String | HTMLElement} Accepts either a string to use as an ID for getting a DOM reference, or an actual DOM reference.
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| 169 | */
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| 170 | this.getX = function(el) {
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| 171 | return this.getXY(el)[0];
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| 172 | };
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| 173 |
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| 174 | /**
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| 175 | * Gets the current Y position of an element based on page coordinates. Element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
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| 176 | * @param {String | HTMLElement} Accepts either a string to use as an ID for getting a DOM reference, or an actual DOM reference.
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| 177 | */
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| 178 | this.getY = function(el) {
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| 179 | return this.getXY(el)[1];
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| 180 | };
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| 181 |
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| 182 | /**
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| 183 | * Set the position of an html element in page coordinates, regardless of how the element is positioned.
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| 184 | * The element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
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| 185 | * @param {String | HTMLElement} Accepts either a string to use as an ID for getting a DOM reference, or an actual DOM reference.
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| 186 | * @param {array} pos Contains X & Y values for new position (coordinates are page-based)
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| 187 | */
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| 188 | this.setXY = function(el, pos, noRetry) {
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| 189 | el = this.get(el);
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| 190 | var pageXY = YAHOO.util.Dom.getXY(el);
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| 191 | if (pageXY === false) { return false; } // has to be part of doc to have pageXY
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| 192 |
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| 193 | if (this.getStyle(el, 'position') == 'static') { // default to relative
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| 194 | this.setStyle(el, 'position', 'relative');
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| 195 | }
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| 196 |
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| 197 | var delta = [
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| 198 | parseInt( YAHOO.util.Dom.getStyle(el, 'left'), 10 ),
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| 199 | parseInt( YAHOO.util.Dom.getStyle(el, 'top'), 10 )
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| 200 | ];
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| 201 |
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| 202 | if ( isNaN(delta[0]) ) { delta[0] = 0; } // defalts to 'auto'
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| 203 | if ( isNaN(delta[1]) ) { delta[1] = 0; }
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| 204 |
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| 205 | if (pos[0] !== null) { el.style.left = pos[0] - pageXY[0] + delta[0] + 'px'; }
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| 206 | if (pos[1] !== null) { el.style.top = pos[1] - pageXY[1] + delta[1] + 'px'; }
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| 207 |
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| 208 | var newXY = this.getXY(el);
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| 209 |
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| 210 | // if retry is true, try one more time if we miss
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| 211 | if (!noRetry && (newXY[0] != pos[0] || newXY[1] != pos[1]) ) {
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| 212 | this.setXY(el, pos, true);
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| 213 | }
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| 214 |
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| 215 | return true;
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| 216 | };
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| 217 |
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| 218 | /**
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| 219 | * Set the X position of an html element in page coordinates, regardless of how the element is positioned.
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| 220 | * The element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
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| 221 | * @param {String | HTMLElement} Accepts either a string to use as an ID for getting a DOM reference, or an actual DOM reference.
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| 222 | * @param {Int} x to use as the X coordinate.
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| 223 | */
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| 224 | this.setX = function(el, x) {
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| 225 | return this.setXY(el, [x, null]);
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| 226 | };
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| 227 |
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| 228 | /**
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| 229 | * Set the Y position of an html element in page coordinates, regardless of how the element is positioned.
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| 230 | * The element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
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| 231 | * @param {String | HTMLElement} Accepts either a string to use as an ID for getting a DOM reference, or an actual DOM reference.
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| 232 | * @param {Int} Value to use as the Y coordinate.
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| 233 | */
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| 234 | this.setY = function(el, y) {
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| 235 | return this.setXY(el, [null, y]);
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| 236 | };
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| 237 |
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| 238 | /**
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| 239 | * Returns the region position of the given element.
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| 240 | * The element must be part of the DOM tree to have a region (display:none or elements not appended return false).
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| 241 | * @param {String | HTMLElement} Accepts either a string to use as an ID for getting a DOM reference, or an actual DOM reference.
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| 242 | * @return {Region} A Region instance containing "top, left, bottom, right" member data.
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| 243 | */
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| 244 | this.getRegion = function(el) {
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| 245 | el = this.get(el);
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| 246 | return new YAHOO.util.Region.getRegion(el);
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| 247 | };
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| 248 |
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| 249 | /**
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| 250 | * Returns the width of the client (viewport).
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| 251 | * @return {Int} The width of the viewable area of the page.
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| 252 | */
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| 253 | this.getClientWidth = function() {
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| 254 | return (
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| 255 | document.documentElement.offsetWidth
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| 256 | || document.body.offsetWidth
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| 257 | );
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| 258 | };
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| 259 |
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| 260 | /**
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| 261 | * Returns the height of the client (viewport).
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| 262 | * @return {Int} The height of the viewable area of the page.
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| 263 | */
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| 264 | this.getClientHeight = function() {
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| 265 | return (
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| 266 | self.innerHeight
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| 267 | || document.documentElement.clientHeight
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| 268 | || document.body.clientHeight
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| 269 | );
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| 270 | };
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| 271 | };
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| 272 |
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| 273 | /**
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| 274 | * @class A region is a representation of an object on a grid. It is defined
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| 275 | * by the top, right, bottom, left extents, so is rectangular by default. If
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| 276 | * other shapes are required, this class could be extended to support it.
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| 277 | *
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| 278 | * @param {int} t the top extent
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| 279 | * @param {int} r the right extent
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| 280 | * @param {int} b the bottom extent
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| 281 | * @param {int} l the left extent
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| 282 | * @constructor
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| 283 | */
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| 284 | YAHOO.util.Region = function(t, r, b, l) {
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| 285 |
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| 286 | /**
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| 287 | * The region's top extent
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| 288 | * @type int
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| 289 | */
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| 290 | this.top = t;
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| 291 |
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| 292 | /**
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| 293 | * The region's right extent
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| 294 | * @type int
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| 295 | */
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| 296 | this.right = r;
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| 297 |
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| 298 | /**
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| 299 | * The region's bottom extent
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| 300 | * @type int
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| 301 | */
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| 302 | this.bottom = b;
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| 303 |
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| 304 | /**
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| 305 | * The region's left extent
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| 306 | * @type int
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| 307 | */
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| 308 | this.left = l;
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| 309 | };
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| 310 |
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| 311 | /**
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| 312 | * Returns true if this region contains the region passed in
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| 313 | *
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| 314 | * @param {Region} region The region to evaluate
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| 315 | * @return {boolean} True if the region is contained with this region,
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| 316 | * else false
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| 317 | */
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| 318 | YAHOO.util.Region.prototype.contains = function(region) {
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| 319 | return ( region.left >= this.left &&
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| 320 | region.right <= this.right &&
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| 321 | region.top >= this.top &&
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| 322 | region.bottom <= this.bottom );
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| 323 | };
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| 324 |
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| 325 | /**
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| 326 | * Returns the area of the region
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| 327 | *
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| 328 | * @return {int} the region's area
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| 329 | */
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| 330 | YAHOO.util.Region.prototype.getArea = function() {
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| 331 | return ( (this.bottom - this.top) * (this.right - this.left) );
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| 332 | };
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| 333 |
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| 334 | /**
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| 335 | * Returns the region where the passed in region overlaps with this one
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| 336 | *
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| 337 | * @param {Region} region The region that intersects
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| 338 | * @return {Region} The overlap region, or null if there is no overlap
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| 339 | */
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| 340 | YAHOO.util.Region.prototype.intersect = function(region) {
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| 341 | var t = Math.max( this.top, region.top );
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| 342 | var r = Math.min( this.right, region.right );
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| 343 | var b = Math.min( this.bottom, region.bottom );
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| 344 | var l = Math.max( this.left, region.left );
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| 345 |
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| 346 | if (b >= t && r >= l) {
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| 347 | return new YAHOO.util.Region(t, r, b, l);
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| 348 | } else {
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| 349 | return null;
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| 350 | }
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| 351 | };
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| 352 |
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| 353 | /**
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| 354 | * Returns the region representing the smallest region that can contain both
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| 355 | * the passed in region and this region.
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| 356 | *
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| 357 | * @param {Region} region The region that to create the union with
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| 358 | * @return {Region} The union region
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| 359 | */
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| 360 | YAHOO.util.Region.prototype.union = function(region) {
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| 361 | var t = Math.min( this.top, region.top );
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| 362 | var r = Math.max( this.right, region.right );
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| 363 | var b = Math.max( this.bottom, region.bottom );
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| 364 | var l = Math.min( this.left, region.left );
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| 365 |
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| 366 | return new YAHOO.util.Region(t, r, b, l);
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| 367 | };
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| 368 |
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| 369 | /**
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| 370 | * toString
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| 371 | * @return string the region properties
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| 372 | */
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| 373 | YAHOO.util.Region.prototype.toString = function() {
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| 374 | return ( "Region {" +
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| 375 | " t: " + this.top +
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| 376 | ", r: " + this.right +
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| 377 | ", b: " + this.bottom +
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| 378 | ", l: " + this.left +
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| 379 | "}" );
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| 380 | }
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| 381 |
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| 382 | /**
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| 383 | * Returns a region that is occupied by the DOM element
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| 384 | *
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| 385 | * @param {HTMLElement} el The element
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| 386 | * @return {Region} The region that the element occupies
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| 387 | * @static
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| 388 | */
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| 389 | YAHOO.util.Region.getRegion = function(el) {
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| 390 | var p = YAHOO.util.Dom.getXY(el);
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| 391 |
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| 392 | var t = p[1];
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| 393 | var r = p[0] + el.offsetWidth;
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| 394 | var b = p[1] + el.offsetHeight;
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| 395 | var l = p[0];
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| 396 |
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| 397 | return new YAHOO.util.Region(t, r, b, l);
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| 398 | };
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| 399 |
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| 400 | /////////////////////////////////////////////////////////////////////////////
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| 401 |
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| 402 |
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| 403 | /**
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| 404 | * @class
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| 405 | *
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| 406 | * A point is a region that is special in that it represents a single point on
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| 407 | * the grid.
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| 408 | *
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| 409 | * @param {int} x The X position of the point
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| 410 | * @param {int} y The Y position of the point
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| 411 | * @constructor
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| 412 | * @extends Region
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| 413 | */
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| 414 | YAHOO.util.Point = function(x, y) {
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| 415 | /**
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| 416 | * The X position of the point
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| 417 | * @type int
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| 418 | */
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| 419 | this.x = x;
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| 420 |
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| 421 | /**
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| 422 | * The Y position of the point
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| 423 | * @type int
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| 424 | */
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| 425 | this.y = y;
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| 426 |
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| 427 | this.top = y;
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| 428 | this.right = x;
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| 429 | this.bottom = y;
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| 430 | this.left = x;
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| 431 | };
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| 432 |
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| 433 | YAHOO.util.Point.prototype = new YAHOO.util.Region();
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