adjustPosition: function()

in server/site/js/pikaday.js [1033:1091]
51 lines of code
20 McCabe index (conditional complexity)

        adjustPosition: function()
        {
            var field, pEl, width, height, viewportWidth, viewportHeight, scrollTop, left, top, clientRect, leftAligned, bottomAligned;

            if (this._o.container) return;

            this.el.style.position = 'absolute';

            field = this._o.trigger;
            pEl = field;
            width = this.el.offsetWidth;
            height = this.el.offsetHeight;
            viewportWidth = window.innerWidth || document.documentElement.clientWidth;
            viewportHeight = window.innerHeight || document.documentElement.clientHeight;
            scrollTop = window.pageYOffset || document.body.scrollTop || document.documentElement.scrollTop;
            leftAligned = true;
            bottomAligned = true;

            if (typeof field.getBoundingClientRect === 'function') {
                clientRect = field.getBoundingClientRect();
                left = clientRect.left + window.pageXOffset;
                top = clientRect.bottom + window.pageYOffset;
            } else {
                left = pEl.offsetLeft;
                top  = pEl.offsetTop + pEl.offsetHeight;
                while((pEl = pEl.offsetParent)) {
                    left += pEl.offsetLeft;
                    top  += pEl.offsetTop;
                }
            }

            // default position is bottom & left
            if ((this._o.reposition && left + width > viewportWidth) ||
                (
                    this._o.position.indexOf('right') > -1 &&
                    left - width + field.offsetWidth > 0
                )
            ) {
                left = left - width + field.offsetWidth;
                leftAligned = false;
            }
            if ((this._o.reposition && top + height > viewportHeight + scrollTop) ||
                (
                    this._o.position.indexOf('top') > -1 &&
                    top - height - field.offsetHeight > 0
                )
            ) {
                top = top - height - field.offsetHeight;
                bottomAligned = false;
            }

            this.el.style.left = left + 'px';
            this.el.style.top = top + 'px';

            addClass(this.el, leftAligned ? 'left-aligned' : 'right-aligned');
            addClass(this.el, bottomAligned ? 'bottom-aligned' : 'top-aligned');
            removeClass(this.el, !leftAligned ? 'left-aligned' : 'right-aligned');
            removeClass(this.el, !bottomAligned ? 'bottom-aligned' : 'top-aligned');
        },