openlayers
Version:
Build tools and sources for developing OpenLayers based mapping applications
80 lines (68 loc) • 2.1 kB
JavaScript
goog.provide('ol.dom');
/**
* Create an html canvas element and returns its 2d context.
* @param {number=} opt_width Canvas width.
* @param {number=} opt_height Canvas height.
* @return {CanvasRenderingContext2D} The context.
*/
ol.dom.createCanvasContext2D = function(opt_width, opt_height) {
var canvas = document.createElement('CANVAS');
if (opt_width) {
canvas.width = opt_width;
}
if (opt_height) {
canvas.height = opt_height;
}
return canvas.getContext('2d');
};
/**
* Get the current computed width for the given element including margin,
* padding and border.
* Equivalent to jQuery's `$(el).outerWidth(true)`.
* @param {!Element} element Element.
* @return {number} The width.
*/
ol.dom.outerWidth = function(element) {
var width = element.offsetWidth;
var style = element.currentStyle || getComputedStyle(element);
width += parseInt(style.marginLeft, 10) + parseInt(style.marginRight, 10);
return width;
};
/**
* Get the current computed height for the given element including margin,
* padding and border.
* Equivalent to jQuery's `$(el).outerHeight(true)`.
* @param {!Element} element Element.
* @return {number} The height.
*/
ol.dom.outerHeight = function(element) {
var height = element.offsetHeight;
var style = element.currentStyle || getComputedStyle(element);
height += parseInt(style.marginTop, 10) + parseInt(style.marginBottom, 10);
return height;
};
/**
* @param {Node} newNode Node to replace old node
* @param {Node} oldNode The node to be replaced
*/
ol.dom.replaceNode = function(newNode, oldNode) {
var parent = oldNode.parentNode;
if (parent) {
parent.replaceChild(newNode, oldNode);
}
};
/**
* @param {Node} node The node to remove.
* @returns {Node} The node that was removed or null.
*/
ol.dom.removeNode = function(node) {
return node && node.parentNode ? node.parentNode.removeChild(node) : null;
};
/**
* @param {Node} node The node to remove the children from.
*/
ol.dom.removeChildren = function(node) {
while (node.lastChild) {
node.removeChild(node.lastChild);
}
};