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/*!
* getSize v2.0.2
* measure size of elements
* MIT license
*/
/*jshint browser: true, strict: true, undef: true, unused: true */
/*global define: false, module: false, console: false */
( function( window, factory ) {
'use strict';
if ( typeof define == 'function' && define.amd ) {
// AMD
define( function() {
return factory();
});
} else if ( typeof module == 'object' && module.exports ) {
// CommonJS
module.exports = factory();
} else {
// browser global
window.getSize = factory();
}
})( window, function factory() {
'use strict';
// -------------------------- helpers -------------------------- //
// get a number from a string, not a percentage
function getStyleSize( value ) {
var num = parseFloat( value );
// not a percent like '100%', and a number
var isValid = value.indexOf('%') == -1 && !isNaN( num );
return isValid && num;
}
function noop() {}
var logError = typeof console == 'undefined' ? noop :
function( message ) {
console.error( message );
};
// -------------------------- measurements -------------------------- //
var measurements = [
'paddingLeft',
'paddingRight',
'paddingTop',
'paddingBottom',
'marginLeft',
'marginRight',
'marginTop',
'marginBottom',
'borderLeftWidth',
'borderRightWidth',
'borderTopWidth',
'borderBottomWidth'
];
var measurementsLength = measurements.length;
function getZeroSize() {
var size = {
width: 0,
height: 0,
innerWidth: 0,
innerHeight: 0,
outerWidth: 0,
outerHeight: 0
};
for ( var i=0; i < measurementsLength; i++ ) {
var measurement = measurements[i];
size[ measurement ] = 0;
}
return size;
}
// -------------------------- getStyle -------------------------- //
/**
* getStyle, get style of element, check for Firefox bug
* https://bugzilla.mozilla.org/show_bug.cgi?id=548397
*/
function getStyle( elem ) {
var style = getComputedStyle( elem );
if ( !style ) {
logError( 'Style returned ' + style +
'. Are you running this code in a hidden iframe on Firefox? ' +
'See http://bit.ly/getsizebug1' );
}
return style;
}
// -------------------------- setup -------------------------- //
var isSetup = false;
var isBoxSizeOuter;
/**
* setup
* check isBoxSizerOuter
* do on first getSize() rather than on page load for Firefox bug
*/
function setup() {
// setup once
if ( isSetup ) {
return;
}
isSetup = true;
// -------------------------- box sizing -------------------------- //
/**
* WebKit measures the outer-width on style.width on border-box elems
* IE & Firefox<29 measures the inner-width
*/
var div = document.createElement('div');
div.style.width = '200px';
div.style.padding = '1px 2px 3px 4px';
div.style.borderStyle = 'solid';
div.style.borderWidth = '1px 2px 3px 4px';
div.style.boxSizing = 'border-box';
var body = document.body || document.documentElement;
body.appendChild( div );
var style = getStyle( div );
getSize.isBoxSizeOuter = isBoxSizeOuter = getStyleSize( style.width ) == 200;
body.removeChild( div );
}
// -------------------------- getSize -------------------------- //
function getSize( elem ) {
setup();
// use querySeletor if elem is string
if ( typeof elem == 'string' ) {
elem = document.querySelector( elem );
}
// do not proceed on non-objects
if ( !elem || typeof elem != 'object' || !elem.nodeType ) {
return;
}
var style = getStyle( elem );
// if hidden, everything is 0
if ( style.display == 'none' ) {
return getZeroSize();
}
var size = {};
size.width = elem.offsetWidth;
size.height = elem.offsetHeight;
var isBorderBox = size.isBorderBox = style.boxSizing == 'border-box';
// get all measurements
for ( var i=0; i < measurementsLength; i++ ) {
var measurement = measurements[i];
var value = style[ measurement ];
var num = parseFloat( value );
// any 'auto', 'medium' value will be 0
size[ measurement ] = !isNaN( num ) ? num : 0;
}
var paddingWidth = size.paddingLeft + size.paddingRight;
var paddingHeight = size.paddingTop + size.paddingBottom;
var marginWidth = size.marginLeft + size.marginRight;
var marginHeight = size.marginTop + size.marginBottom;
var borderWidth = size.borderLeftWidth + size.borderRightWidth;
var borderHeight = size.borderTopWidth + size.borderBottomWidth;
var isBorderBoxSizeOuter = isBorderBox && isBoxSizeOuter;
// overwrite width and height if we can get it from style
var styleWidth = getStyleSize( style.width );
if ( styleWidth !== false ) {
size.width = styleWidth +
// add padding and border unless it's already including it
( isBorderBoxSizeOuter ? 0 : paddingWidth + borderWidth );
}
var styleHeight = getStyleSize( style.height );
if ( styleHeight !== false ) {
size.height = styleHeight +
// add padding and border unless it's already including it
( isBorderBoxSizeOuter ? 0 : paddingHeight + borderHeight );
}
size.innerWidth = size.width - ( paddingWidth + borderWidth );
size.innerHeight = size.height - ( paddingHeight + borderHeight );
size.outerWidth = size.width + marginWidth;
size.outerHeight = size.height + marginHeight;
return size;
}
return getSize;
});
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