82 lines
2.1 KiB
JavaScript
82 lines
2.1 KiB
JavaScript
/**
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* @module ol/dom
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*/
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/**
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* Create an html canvas element and returns its 2d context.
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* @param {number=} opt_width Canvas width.
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* @param {number=} opt_height Canvas height.
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* @return {CanvasRenderingContext2D} The context.
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*/
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export function createCanvasContext2D(opt_width, opt_height) {
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const canvas = /** @type {HTMLCanvasElement} */ (document.createElement('canvas'));
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if (opt_width) {
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canvas.width = opt_width;
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}
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if (opt_height) {
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canvas.height = opt_height;
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}
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return /** @type {CanvasRenderingContext2D} */ (canvas.getContext('2d'));
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}
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/**
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* Get the current computed width for the given element including margin,
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* padding and border.
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* Equivalent to jQuery's `$(el).outerWidth(true)`.
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* @param {!HTMLElement} element Element.
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* @return {number} The width.
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*/
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export function outerWidth(element) {
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let width = element.offsetWidth;
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const style = getComputedStyle(element);
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width += parseInt(style.marginLeft, 10) + parseInt(style.marginRight, 10);
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return width;
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}
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/**
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* Get the current computed height for the given element including margin,
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* padding and border.
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* Equivalent to jQuery's `$(el).outerHeight(true)`.
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* @param {!HTMLElement} element Element.
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* @return {number} The height.
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*/
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export function outerHeight(element) {
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let height = element.offsetHeight;
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const style = getComputedStyle(element);
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height += parseInt(style.marginTop, 10) + parseInt(style.marginBottom, 10);
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return height;
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}
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/**
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* @param {Node} newNode Node to replace old node
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* @param {Node} oldNode The node to be replaced
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*/
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export function replaceNode(newNode, oldNode) {
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const parent = oldNode.parentNode;
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if (parent) {
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parent.replaceChild(newNode, oldNode);
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}
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}
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/**
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* @param {Node} node The node to remove.
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* @returns {Node} The node that was removed or null.
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*/
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export function removeNode(node) {
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return node && node.parentNode ? node.parentNode.removeChild(node) : null;
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}
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/**
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* @param {Node} node The node to remove the children from.
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*/
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export function removeChildren(node) {
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while (node.lastChild) {
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node.removeChild(node.lastChild);
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}
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}
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