Extend Bootstrap 3 Popover positions

bootstrap-popover-extension.css

.popover.topLeft {
    margin-top: -10px;
}

.popover.topLeft .arrow {
    bottom: -11px;
    left: 20%;
    margin-left: -11px;
    border-top-color: #999999;
    border-top-color: rgba(0, 0, 0, 0.25);
    border-bottom-width: 0;
}

.popover.topLeft .arrow:after {
    bottom: 1px;
    margin-left: -10px;
    border-top-color: #ffffff;
    border-bottom-width: 0;
    content: " ";
}

/** Top Right **/
.popover.topRight {
    margin-top: -10px;
}

.popover.topRight .arrow {
    bottom: -11px;
    left: 80%;
    margin-left: -11px;
    border-top-color: #999999;
    border-top-color: rgba(0, 0, 0, 0.25);
    border-bottom-width: 0;
}

.popover.topRight .arrow:after {
    bottom: 1px;
    margin-left: -10px;
    border-top-color: #ffffff;
    border-bottom-width: 0;
    content: " ";
}

/*************************
 *   Right Positions
 *************************/

/** Right Top **/
.popover.rightTop {
    margin-left: 10px;
}

.popover.rightTop .arrow {
    top: 20%;
    left: -11px;
    margin-top: -11px;
    border-right-color: #999999;
    border-right-color: rgba(0, 0, 0, 0.25);
    border-left-width: 0;
}

.popover.rightTop .arrow:after {
    bottom: -10px;
    left: 1px;
    border-right-color: #ffffff;
    border-left-width: 0;
    content: " ";
}

/** Right Bottom **/
.popover.rightBottom {
    margin-left: 10px;
}

.popover.rightBottom .arrow {
    top: 80%;
    left: -11px;
    margin-top: -11px;
    border-right-color: #999999;
    border-right-color: rgba(0, 0, 0, 0.25);
    border-left-width: 0;
}

.popover.rightBottom .arrow:after {
    bottom: -10px;
    left: 1px;
    border-right-color: #ffffff;
    border-left-width: 0;
    content: " ";
}

/*************************
 *   Bottom Positions
 *************************/

/** Bottom Left **/
.popover.bottomLeft {
    margin-top: 10px;
}

.popover.bottomLeft .arrow {
    top: -11px;
    left: 20%;
    margin-left: -11px;
    border-bottom-color: #999999;
    border-bottom-color: rgba(0, 0, 0, 0.25);
    border-top-width: 0;
}

.popover.bottomLeft .arrow:after {
    top: 1px;
    margin-left: -10px;
    border-bottom-color: #ffffff;
    border-top-width: 0;
    content: " ";
}

/** Bottom Right **/
.popover.bottomRight {
    margin-top: 10px;
}

.popover.bottomRight .arrow {
    top: -11px;
    left: 80%;
    margin-left: -11px;
    border-bottom-color: #999999;
    border-bottom-color: rgba(0, 0, 0, 0.25);
    border-top-width: 0;
}

.popover.bottomRight .arrow:after {
    top: 1px;
    margin-left: -10px;
    border-bottom-color: #ffffff;
    border-top-width: 0;
    content: " ";
}

/*************************
 *   Left Positions
 *************************/

/** Left Top **/
.popover.leftTop {
    margin-left: -10px;
}

.popover.leftTop .arrow {
    top: 20%;
    right: -11px;
    margin-top: -11px;
    border-left-color: #999999;
    border-left-color: rgba(0, 0, 0, 0.25);
    border-right-width: 0;
}

.popover.leftTop .arrow:after {
    right: 1px;
    bottom: -10px;
    border-left-color: #ffffff;
    border-right-width: 0;
    content: " ";
}


/** Left Bottom **/
.popover.leftBottom {
    margin-left: -10px;
}

.popover.leftBottom .arrow {
    top: 80%;
    right: -11px;
    margin-top: -11px;
    border-left-color: #999999;
    border-left-color: rgba(0, 0, 0, 0.25);
    border-right-width: 0;
}

.popover.leftBottom .arrow:after {
    right: 1px;
    bottom: -10px;
    border-left-color: #ffffff;
    border-right-width: 0;
    content: " ";
}

bootstrap-popover-extension.js

(function($) {

    $.fn.popover.Constructor.prototype.getCalculatedOffset = function (placement, pos, actualWidth, actualHeight) {
        var result;
        switch (placement) {
            case 'bottom':
                result = {top: pos.top + pos.height, left: pos.left + pos.width / 2 - actualWidth / 2};
                break;
            case 'top':
                result = {top: pos.top - actualHeight, left: pos.left + pos.width / 2 - actualWidth / 2};
                break;
            case 'left':
                result = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left - actualWidth};
                break;
            case 'right':
                result = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left + pos.width};
                break;

            // extend placements (top)
            case 'topLeft':
                result = {top: pos.top - actualHeight,  left: pos.left + pos.width / 2 - (actualWidth * .20)};
                break;
            case 'topRight':
                result = {top: pos.top - actualHeight, left: pos.left + pos.width / 2 - (actualWidth * .80)};
                break;

            // extend placements (right)
            case 'rightTop':
                result = {top: pos.top + pos.height / 2 - (actualHeight *.20), left: pos.left + pos.width};
                break;
            case 'rightBottom':
                result = {top: pos.top + pos.height / 2 - (actualHeight * .80), left: pos.left + pos.width};
                break;

            // extend placements (bottom)
            case 'bottomLeft':
                result = {top: pos.top + pos.height, left: pos.left + pos.width / 2 - (actualWidth * .20)};
                break;
            case 'bottomRight':
                result = {top: pos.top + pos.height, left: pos.left + pos.width / 2 - (actualWidth * .80)};
                break;

            // extend placements (left)
            case 'leftTop':
                result = {top: pos.top + pos.height / 2 - (actualHeight *.20), left: pos.left - actualWidth};
                break;
            case 'leftBottom':
                result = {top: pos.top + pos.height / 2 - (actualHeight * .80), left: pos.left - actualWidth};
                break;

            default:
                /* placement == 'top' */
                result = {top: pos.top - actualHeight, left: pos.left + pos.width / 2 - actualWidth / 2}
                break;
        }
        return result;
    };

})(jQuery);

installation.html

<script type="text/javascript" src="/bootstrap/js/bootstrap.min.js"></script>
<script type="text/javascript" src="bootstrap-popover-extension.js"></script>
<link rel="stylesheet" type="text/css" href="bootstrap-popover-extension.css">