/*!
 Autosize 3.0.7
 license: MIT
 http://www.jacklmoore.com/autosize
 */
(function (global, factory) {
    if (typeof define === 'function' && define.amd) {
        define(['exports', 'module'], factory);
    } else if (typeof exports !== 'undefined' && typeof module !== 'undefined') {
        factory(exports, module);
    } else {
        var mod = {
            exports: {}
        };
        factory(mod.exports, mod);
        global.autosize = mod.exports;
    }
})(this, function (exports, module) {
    'use strict';

    function assign(ta) {
        var _ref = arguments[1] === undefined ? {} : arguments[1];

        var _ref$setOverflowX = _ref.setOverflowX;
        var setOverflowX = _ref$setOverflowX === undefined ? true : _ref$setOverflowX;
        var _ref$setOverflowY = _ref.setOverflowY;
        var setOverflowY = _ref$setOverflowY === undefined ? true : _ref$setOverflowY;

        if (!ta || !ta.nodeName || ta.nodeName !== 'TEXTAREA' || ta.hasAttribute('data-autosize-on')) return;

        var heightOffset = null;
        var overflowY = 'hidden';

        function init() {
            var style = window.getComputedStyle(ta, null);

            if (style.resize === 'vertical') {
                ta.style.resize = 'none';
            } else if (style.resize === 'both') {
                ta.style.resize = 'horizontal';
            }

            if (style.boxSizing === 'content-box') {
                heightOffset = -(parseFloat(style.paddingTop) + parseFloat(style.paddingBottom));
            } else {
                heightOffset = parseFloat(style.borderTopWidth) + parseFloat(style.borderBottomWidth);
            }

            update();
        }

        function changeOverflow(value) {
            {
                // Chrome/Safari-specific fix:
                // When the textarea y-overflow is hidden, Chrome/Safari do not reflow the text to account for the space
                // made available by removing the scrollbar. The following forces the necessary text reflow.
                var width = ta.style.width;
                ta.style.width = '0px';
                // Force reflow:
                /* jshint ignore:start */
                ta.offsetWidth;
                /* jshint ignore:end */
                ta.style.width = width;
            }

            overflowY = value;

            if (setOverflowY) {
                ta.style.overflowY = value;
            }

            update();
        }

        function update() {
            var startHeight = ta.style.height;
            var htmlTop = window.pageYOffset;
            var bodyTop = document.body.scrollTop;
            var originalHeight = ta.style.height;

            ta.style.height = 'auto';

            var endHeight = ta.scrollHeight + heightOffset;

            if (ta.scrollHeight === 0) {
                // If the scrollHeight is 0, then the element probably has display:none or is detached from the DOM.
                ta.style.height = originalHeight;
                return;
            }

            ta.style.height = endHeight + 'px';

            // prevents scroll-position jumping
            document.documentElement.scrollTop = htmlTop;
            document.body.scrollTop = bodyTop;

            var style = window.getComputedStyle(ta, null);

            if (style.height !== ta.style.height) {
                if (overflowY !== 'visible') {
                    changeOverflow('visible');
                    return;
                }
            } else {
                if (overflowY !== 'hidden') {
                    changeOverflow('hidden');
                    return;
                }
            }

            if (startHeight !== ta.style.height) {
                var evt = document.createEvent('Event');
                evt.initEvent('autosize:resized', true, false);
                ta.dispatchEvent(evt);
            }
        }

        var destroy = (function (style) {
            window.removeEventListener('resize', update);
            ta.removeEventListener('input', update);
            ta.removeEventListener('keyup', update);
            ta.removeAttribute('data-autosize-on');
            ta.removeEventListener('autosize:destroy', destroy);

            Object.keys(style).forEach(function (key) {
                ta.style[key] = style[key];
            });
        }).bind(ta, {
                height: ta.style.height,
                resize: ta.style.resize,
                overflowY: ta.style.overflowY,
                overflowX: ta.style.overflowX,
                wordWrap: ta.style.wordWrap });

        ta.addEventListener('autosize:destroy', destroy);

        // IE9 does not fire onpropertychange or oninput for deletions,
        // so binding to onkeyup to catch most of those events.
        // There is no way that I know of to detect something like 'cut' in IE9.
        if ('onpropertychange' in ta && 'oninput' in ta) {
            ta.addEventListener('keyup', update);
        }

        window.addEventListener('resize', update);
        ta.addEventListener('input', update);
        ta.addEventListener('autosize:update', update);
        ta.setAttribute('data-autosize-on', true);

        if (setOverflowY) {
            ta.style.overflowY = 'hidden';
        }
        if (setOverflowX) {
            ta.style.overflowX = 'hidden';
            ta.style.wordWrap = 'break-word';
        }

        init();
    }

    function destroy(ta) {
        if (!(ta && ta.nodeName && ta.nodeName === 'TEXTAREA')) return;
        var evt = document.createEvent('Event');
        evt.initEvent('autosize:destroy', true, false);
        ta.dispatchEvent(evt);
    }

    function update(ta) {
        if (!(ta && ta.nodeName && ta.nodeName === 'TEXTAREA')) return;
        var evt = document.createEvent('Event');
        evt.initEvent('autosize:update', true, false);
        ta.dispatchEvent(evt);
    }

    var autosize = null;

    // Do nothing in Node.js environment and IE8 (or lower)
    if (typeof window === 'undefined' || typeof window.getComputedStyle !== 'function') {
        autosize = function (el) {
            return el;
        };
        autosize.destroy = function (el) {
            return el;
        };
        autosize.update = function (el) {
            return el;
        };
    } else {
        autosize = function (el, options) {
            if (el) {
                Array.prototype.forEach.call(el.length ? el : [el], function (x) {
                    return assign(x, options);
                });
            }
            return el;
        };
        autosize.destroy = function (el) {
            if (el) {
                Array.prototype.forEach.call(el.length ? el : [el], destroy);
            }
            return el;
        };
        autosize.update = function (el) {
            if (el) {
                Array.prototype.forEach.call(el.length ? el : [el], update);
            }
            return el;
        };
    }

    module.exports = autosize;
});