86 lines
1.6 KiB
JavaScript
86 lines
1.6 KiB
JavaScript
/**
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* @module ol/css
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*/
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/**
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* The CSS class for hidden feature.
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*
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* @const
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* @type {string}
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*/
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export const CLASS_HIDDEN = 'ol-hidden';
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/**
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* The CSS class that we'll give the DOM elements to have them selectable.
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*
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* @const
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* @type {string}
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*/
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export const CLASS_SELECTABLE = 'ol-selectable';
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/**
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* The CSS class that we'll give the DOM elements to have them unselectable.
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*
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* @const
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* @type {string}
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*/
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export const CLASS_UNSELECTABLE = 'ol-unselectable';
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/**
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* The CSS class for unsupported feature.
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*
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* @const
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* @type {string}
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*/
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export const CLASS_UNSUPPORTED = 'ol-unsupported';
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/**
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* The CSS class for controls.
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*
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* @const
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* @type {string}
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*/
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export const CLASS_CONTROL = 'ol-control';
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/**
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* The CSS class that we'll give the DOM elements that are collapsed, i.e.
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* to those elements which usually can be expanded.
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*
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* @const
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* @type {string}
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*/
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export const CLASS_COLLAPSED = 'ol-collapsed';
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/**
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* Get the list of font families from a font spec. Note that this doesn't work
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* for font families that have commas in them.
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* @param {string} The CSS font property.
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* @return {Object<string>} The font families (or null if the input spec is invalid).
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*/
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export const getFontFamilies = (function() {
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let style;
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const cache = {};
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return function(font) {
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if (!style) {
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style = document.createElement('div').style;
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}
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if (!(font in cache)) {
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style.font = font;
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const family = style.fontFamily;
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style.font = '';
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if (!family) {
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return null;
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}
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cache[font] = family.split(/,\s?/);
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}
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return cache[font];
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};
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})();
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