Created
January 3, 2012 18:36
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Get object with computed styles from the node
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/** | |
* Return object with computed styles | |
* @param {DOMNode} node | |
* @param {String|Array} styles_to_get "float colot padding-top" or ["float", "padding-top", "padding-bottom"] | |
* @return {Object} list of styles values { | |
* "float" : "none", | |
* "color" : "#000000" | |
* } | |
*/ | |
function get_computed_styles(node, styles_to_get) { | |
'use strict'; | |
var res = {}, | |
current_styles, | |
camel_case_style_name, | |
second_param_type, | |
i; | |
// Get object, representing current styles | |
if (node.currentStyle) { | |
current_styles = node.currentStyle; | |
} else if (window.getComputedStyle) { | |
current_styles = window.getComputedStyle(node); | |
} else { | |
throw (new Error('get_computed_styles: could not get styles')); | |
} | |
second_param_type = Object.prototype.toString.call(styles_to_get); | |
// Create array of styles to get, if possible | |
if (styles_to_get) { | |
if (second_param_type === '[object String]') { | |
styles_to_get = styles_to_get.split(/\s+/); | |
} else if (second_param_type !== '[object Array]') { | |
throw (new Error('get_computed_styles: second param string or array expected, but got ' + second_param_type)); | |
} | |
// Collect styles value into result object | |
for (i = 0; i < styles_to_get.length; i += 1) { | |
camel_case_style_name = styles_to_get[i].replace(/-(.)/, function (match, first_letter) { | |
return first_letter.toUpperCase(); | |
}); | |
if (camel_case_style_name === 'float') { | |
res[styles_to_get[i]] = current_styles.cssFloat || current_styles.styleFloat; | |
} else { | |
res[styles_to_get[i]] = current_styles[camel_case_style_name]; | |
} | |
} | |
} else { | |
res = current_styles; | |
} | |
return res; | |
} |
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