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/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Util.js
* @requires OpenLayers/BaseTypes.js
*/
/**
* Namespace: OpenLayers.Element
*/
OpenLayers.Element = {
/**
* APIFunction: visible
*
* Parameters:
* element - {DOMElement}
*
* Returns:
* {Boolean} Is the element visible?
*/
visible: function(element) {
return OpenLayers.Util.getElement(element).style.display != 'none';
},
/**
* APIFunction: toggle
* Toggle the visibility of element(s) passed in
*
* Parameters:
* element - {DOMElement} Actually user can pass any number of elements
*/
toggle: function() {
for (var i=0, len=arguments.length; i<len; i++) {
var element = OpenLayers.Util.getElement(arguments[i]);
var display = OpenLayers.Element.visible(element) ? 'none'
: '';
element.style.display = display;
}
},
/**
* APIFunction: remove
* Remove the specified element from the DOM.
*
* Parameters:
* element - {DOMElement}
*/
remove: function(element) {
element = OpenLayers.Util.getElement(element);
element.parentNode.removeChild(element);
},
/**
* APIFunction: getHeight
*
* Parameters:
* element - {DOMElement}
*
* Returns:
* {Integer} The offset height of the element passed in
*/
getHeight: function(element) {
element = OpenLayers.Util.getElement(element);
return element.offsetHeight;
},
/**
* Function: hasClass
* Tests if an element has the given CSS class name.
*
* Parameters:
* element - {DOMElement} A DOM element node.
* name - {String} The CSS class name to search for.
*
* Returns:
* {Boolean} The element has the given class name.
*/
hasClass: function(element, name) {
var names = element.className;
return (!!names && new RegExp("(^|\\s)" + name + "(\\s|$)").test(names));
},
/**
* Function: addClass
* Add a CSS class name to an element. Safe where element already has
* the class name.
*
* Parameters:
* element - {DOMElement} A DOM element node.
* name - {String} The CSS class name to add.
*
* Returns:
* {DOMElement} The element.
*/
addClass: function(element, name) {
if(!OpenLayers.Element.hasClass(element, name)) {
element.className += (element.className ? " " : "") + name;
}
return element;
},
/**
* Function: removeClass
* Remove a CSS class name from an element. Safe where element does not
* have the class name.
*
* Parameters:
* element - {DOMElement} A DOM element node.
* name - {String} The CSS class name to remove.
*
* Returns:
* {DOMElement} The element.
*/
removeClass: function(element, name) {
var names = element.className;
if(names) {
element.className = OpenLayers.String.trim(
names.replace(
new RegExp("(^|\\s+)" + name + "(\\s+|$)"), " "
)
);
}
return element;
},
/**
* Function: toggleClass
* Remove a CSS class name from an element if it exists. Add the class name
* if it doesn't exist.
*
* Parameters:
* element - {DOMElement} A DOM element node.
* name - {String} The CSS class name to toggle.
*
* Returns:
* {DOMElement} The element.
*/
toggleClass: function(element, name) {
if(OpenLayers.Element.hasClass(element, name)) {
OpenLayers.Element.removeClass(element, name);
} else {
OpenLayers.Element.addClass(element, name);
}
return element;
},
/**
* APIFunction: getStyle
*
* Parameters:
* element - {DOMElement}
* style - {?}
*
* Returns:
* {?}
*/
getStyle: function(element, style) {
element = OpenLayers.Util.getElement(element);
var value = null;
if (element && element.style) {
value = element.style[OpenLayers.String.camelize(style)];
if (!value) {
if (document.defaultView &&
document.defaultView.getComputedStyle) {
var css = document.defaultView.getComputedStyle(element, null);
value = css ? css.getPropertyValue(style) : null;
} else if (element.currentStyle) {
value = element.currentStyle[OpenLayers.String.camelize(style)];
}
}
var positions = ['left', 'top', 'right', 'bottom'];
if (window.opera &&
(OpenLayers.Util.indexOf(positions,style) != -1) &&
(OpenLayers.Element.getStyle(element, 'position') == 'static')) {
value = 'auto';
}
}
return value == 'auto' ? null : value;
}
};